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Diffstat (limited to 'src/gradient-drag.cpp')
| -rw-r--r-- | src/gradient-drag.cpp | 3128 |
1 files changed, 3128 insertions, 0 deletions
diff --git a/src/gradient-drag.cpp b/src/gradient-drag.cpp new file mode 100644 index 0000000..7c353d8 --- /dev/null +++ b/src/gradient-drag.cpp @@ -0,0 +1,3128 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * On-canvas gradient dragging + * + * Authors: + * bulia byak <buliabyak@users.sf.net> + * Johan Engelen <j.b.c.engelen@ewi.utwente.nl> + * Jon A. Cruz <jon@joncruz.org> + * Abhishek Sharma + * Tavmjong Bah <tavmjong@free.fr> + * + * Copyright (C) 2007 Johan Engelen + * Copyright (C) 2005,2010 Authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstring> +#include <string> + +#include <glibmm/i18n.h> + +#include "desktop-style.h" +#include "desktop.h" +#include "document-undo.h" +#include "document.h" +#include "gradient-chemistry.h" +#include "gradient-drag.h" +#include "include/macros.h" +#include "inkscape.h" +#include "selection-chemistry.h" +#include "selection.h" +#include "snap.h" + +#include "display/control/canvas-item-group.h" +#include "display/control/canvas-item-ctrl.h" +#include "display/control/canvas-item-curve.h" + +#include "object/sp-linear-gradient.h" +#include "object/sp-mesh-gradient.h" +#include "object/sp-namedview.h" +#include "object/sp-radial-gradient.h" +#include "object/sp-stop.h" +#include "style.h" + +#include "svg/css-ostringstream.h" +#include "svg/svg.h" + +#include "ui/icon-names.h" +#include "ui/knot/knot.h" +#include "ui/tools/tool-base.h" +#include "ui/widget/canvas.h" // Forced redraws + +#include "xml/sp-css-attr.h" +#include "xml/attribute-record.h" + +using Inkscape::DocumentUndo; +using Inkscape::allPaintTargets; + +guint32 const GR_KNOT_COLOR_NORMAL = 0xffffff00; +guint32 const GR_KNOT_COLOR_MOUSEOVER = 0xff000000; +guint32 const GR_KNOT_COLOR_SELECTED = 0x0000ff00; +guint32 const GR_KNOT_COLOR_HIGHLIGHT = 0xffffff00; +guint32 const GR_KNOT_COLOR_MESHCORNER = 0xbfbfbf00; + +// absolute distance between gradient points for them to become a single dragger when the drag is created: +#define MERGE_DIST 0.1 + +// knot shapes corresponding to GrPointType enum (in sp-gradient.h) +Inkscape::CanvasItemCtrlShape gr_knot_shapes [] = { + Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE, // POINT_LG_BEGIN + Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_LG_END + Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_LG_MID + Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE, // POINT_RG_CENTER + Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_RG_R1 + Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_RG_R2 + Inkscape::CANVAS_ITEM_CTRL_SHAPE_CROSS, // POINT_RG_FOCUS + Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_RG_MID1 + Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_RG_MID2 + Inkscape::CANVAS_ITEM_CTRL_SHAPE_DIAMOND, // POINT_MG_CORNER + Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE, // POINT_MG_HANDLE + Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE // POINT_MG_TENSOR +}; + +const gchar *gr_knot_descr [] = { + N_("Linear gradient <b>start</b>"), //POINT_LG_BEGIN + N_("Linear gradient <b>end</b>"), + N_("Linear gradient <b>mid stop</b>"), + N_("Radial gradient <b>center</b>"), + N_("Radial gradient <b>radius</b>"), + N_("Radial gradient <b>radius</b>"), + N_("Radial gradient <b>focus</b>"), // POINT_RG_FOCUS + N_("Radial gradient <b>mid stop</b>"), + N_("Radial gradient <b>mid stop</b>"), + N_("Mesh gradient <b>corner</b>"), + N_("Mesh gradient <b>handle</b>"), + N_("Mesh gradient <b>tensor</b>") +}; + +static void +gr_drag_sel_changed(Inkscape::Selection */*selection*/, gpointer data) +{ + GrDrag *drag = (GrDrag *) data; + drag->updateDraggers (); + drag->updateLines (); + drag->updateLevels (); +} + +static void gr_drag_sel_modified(Inkscape::Selection */*selection*/, guint /*flags*/, gpointer data) +{ + GrDrag *drag = (GrDrag *) data; + if (drag->local_change) { + drag->refreshDraggers (); // Needed to move mesh handles and toggle visibility + drag->local_change = false; + } else { + drag->updateDraggers (); + } + drag->updateLines (); + drag->updateLevels (); +} + +/** + * When a _query_style_signal is received, check that \a property requests fill/stroke/opacity (otherwise + * skip), and fill the \a style with the averaged color of all draggables of the selected dragger, if + * any. + */ +static int gr_drag_style_query(SPStyle *style, int property, gpointer data) +{ + GrDrag *drag = (GrDrag *) data; + + if (property != QUERY_STYLE_PROPERTY_FILL && property != QUERY_STYLE_PROPERTY_STROKE && property != QUERY_STYLE_PROPERTY_MASTEROPACITY) { + return QUERY_STYLE_NOTHING; + } + + if (drag->selected.empty()) { + return QUERY_STYLE_NOTHING; + } else { + int ret = QUERY_STYLE_NOTHING; + + float cf[4]; + cf[0] = cf[1] = cf[2] = cf[3] = 0; + + SPStop* selected = nullptr; + int count = 0; + for(auto d : drag->selected) { //for all selected draggers + for(auto draggable : d->draggables) { //for all draggables of dragger + if (ret == QUERY_STYLE_NOTHING) { + ret = QUERY_STYLE_SINGLE; + selected = sp_item_gradient_get_stop(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); + } else if (ret == QUERY_STYLE_SINGLE) { + ret = QUERY_STYLE_MULTIPLE_AVERAGED; + } + + guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); + cf[0] += SP_RGBA32_R_F (c); + cf[1] += SP_RGBA32_G_F (c); + cf[2] += SP_RGBA32_B_F (c); + cf[3] += SP_RGBA32_A_F (c); + + count ++; + } + } + + if (count) { + cf[0] /= count; + cf[1] /= count; + cf[2] /= count; + cf[3] /= count; + + // set both fill and stroke with our stop-color and stop-opacity + style->fill.clear(); + style->fill.setColor( cf[0], cf[1], cf[2] ); + style->fill.set = TRUE; + style->fill.setTag(selected); + style->stroke.clear(); + style->stroke.setColor( cf[0], cf[1], cf[2] ); + style->stroke.set = TRUE; + style->stroke.setTag(selected); + + style->fill_opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]); + style->fill_opacity.set = TRUE; + style->stroke_opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]); + style->stroke_opacity.set = TRUE; + + style->opacity.value = SP_SCALE24_FROM_FLOAT (cf[3]); + style->opacity.set = TRUE; + } + + return ret; + } +} + +Glib::ustring GrDrag::makeStopSafeColor( gchar const *str, bool &isNull ) +{ + Glib::ustring colorStr; + if ( str ) { + isNull = false; + colorStr = str; + Glib::ustring::size_type pos = colorStr.find("url(#"); + if ( pos != Glib::ustring::npos ) { + Glib::ustring targetName = colorStr.substr(pos + 5, colorStr.length() - 6); + std::vector<SPObject *> gradients = desktop->doc()->getResourceList("gradient"); + for (auto gradient : gradients) { + SPGradient* grad = SP_GRADIENT(gradient); + if ( targetName == grad->getId() ) { + SPGradient *vect = grad->getVector(); + SPStop *firstStop = (vect) ? vect->getFirstStop() : grad->getFirstStop(); + if (firstStop) { + Glib::ustring stopColorStr = firstStop->getColor().toString(); + if ( !stopColorStr.empty() ) { + colorStr = stopColorStr; + } + } + break; + } + } + } + } else { + isNull = true; + } + + return colorStr; +} + +bool GrDrag::styleSet( const SPCSSAttr *css, bool switch_style) +{ + if (selected.empty()) { + return false; + } + + SPCSSAttr *stop = sp_repr_css_attr_new(); + + // See if the css contains interesting properties, and if so, translate them into the format + // acceptable for gradient stops + + // any of color properties, in order of increasing priority: + if (css->attribute("flood-color")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("flood-color")); + } + + if (css->attribute("lighting-color")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("lighting-color")); + } + + if (css->attribute("color")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("color")); + } + + if (css->attribute("stroke") && strcmp(css->attribute("stroke"), "none")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("stroke")); + } + + if (css->attribute("fill") && strcmp(css->attribute("fill"), "none")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("fill")); + } + + if (css->attribute("stop-color")) { + sp_repr_css_set_property (stop, "stop-color", css->attribute("stop-color")); + } + + // Make sure the style is allowed for gradient stops. + if ( !sp_repr_css_property_is_unset( stop, "stop-color") ) { + bool stopIsNull = false; + Glib::ustring tmp = makeStopSafeColor( sp_repr_css_property( stop, "stop-color", "" ), stopIsNull ); + if ( !stopIsNull && !tmp.empty() ) { + sp_repr_css_set_property( stop, "stop-color", tmp.c_str() ); + } + } + + + if (css->attribute("stop-opacity")) { // direct setting of stop-opacity has priority + sp_repr_css_set_property(stop, "stop-opacity", css->attribute("stop-opacity")); + } else { // multiply all opacity properties: + gdouble accumulated = 1.0; + accumulated *= sp_svg_read_percentage(css->attribute("flood-opacity"), 1.0); + accumulated *= sp_svg_read_percentage(css->attribute("opacity"), 1.0); + accumulated *= sp_svg_read_percentage(css->attribute("stroke-opacity"), 1.0); + accumulated *= sp_svg_read_percentage(css->attribute("fill-opacity"), 1.0); + + Inkscape::CSSOStringStream os; + os << accumulated; + sp_repr_css_set_property(stop, "stop-opacity", os.str().c_str()); + + if ((css->attribute("fill") && !css->attribute("stroke") && !strcmp(css->attribute("fill"), "none")) || + (css->attribute("stroke") && !css->attribute("fill") && !strcmp(css->attribute("stroke"), "none"))) { + sp_repr_css_set_property(stop, "stop-opacity", "0"); // if a single fill/stroke property is set to none, don't change color, set opacity to 0 + } + } + + const auto& al = stop->attributeList(); + if (al.empty()) { // nothing for us here, pass it on + sp_repr_css_attr_unref(stop); + return false; + } + + for(auto d : selected) { //for all selected draggers + for(auto draggable : d->draggables) { //for all draggables of dragger + SPGradient* gradient = getGradient(draggable->item, draggable->fill_or_stroke); + + // for linear and radial gradients F&S dialog deals with stops' colors; + // don't handle style notifications, or else it will not be possible to switch + // object style back to solid color + if (switch_style && gradient && SP_IS_GRADIENT(gradient) && + (SP_IS_LINEARGRADIENT(gradient) || SP_IS_RADIALGRADIENT(gradient))) { + continue; + } + + local_change = true; + sp_item_gradient_stop_set_style(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop); + } + } + + //sp_repr_css_print(stop); + sp_repr_css_attr_unref(stop); + return local_change; // true if handled +} + +guint32 GrDrag::getColor() +{ + if (selected.empty()) return 0; + + float cf[4]; + cf[0] = cf[1] = cf[2] = cf[3] = 0; + + int count = 0; + + for(auto d : selected) { //for all selected draggers + for(auto draggable : d->draggables) { //for all draggables of dragger + guint32 c = sp_item_gradient_stop_query_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); + cf[0] += SP_RGBA32_R_F (c); + cf[1] += SP_RGBA32_G_F (c); + cf[2] += SP_RGBA32_B_F (c); + cf[3] += SP_RGBA32_A_F (c); + + count ++; + } + } + + if (count) { + cf[0] /= count; + cf[1] /= count; + cf[2] /= count; + cf[3] /= count; + } + + return SP_RGBA32_F_COMPOSE(cf[0], cf[1], cf[2], cf[3]); +} + +// TODO refactor early returns +SPStop *GrDrag::addStopNearPoint(SPItem *item, Geom::Point mouse_p, double tolerance) +{ + gfloat new_stop_offset = 0; // type of SPStop.offset = gfloat + SPGradient *gradient = nullptr; + //bool r1_knot = false; + + // For Mesh + int divide_row = -1; + int divide_column = -1; + double divide_coord = 0.5; + + bool addknot = false; + + for (std::vector<Inkscape::PaintTarget>::const_iterator it = allPaintTargets().begin(); (it != allPaintTargets().end()) && !addknot; ++it) + { + Inkscape::PaintTarget fill_or_stroke = *it; + gradient = getGradient(item, fill_or_stroke); + if (SP_IS_LINEARGRADIENT(gradient)) { + Geom::Point begin = getGradientCoords(item, POINT_LG_BEGIN, 0, fill_or_stroke); + Geom::Point end = getGradientCoords(item, POINT_LG_END, 0, fill_or_stroke); + Geom::LineSegment ls(begin, end); + double offset = ls.nearestTime(mouse_p); + Geom::Point nearest = ls.pointAt(offset); + double dist_screen = Geom::distance(mouse_p, nearest); + if ( dist_screen < tolerance ) { + // calculate the new stop offset + new_stop_offset = distance(begin, nearest) / distance(begin, end); + // add the knot + addknot = true; + } + } else if (SP_IS_RADIALGRADIENT(gradient)) { + Geom::Point begin = getGradientCoords(item, POINT_RG_CENTER, 0, fill_or_stroke); + Geom::Point end = getGradientCoords(item, POINT_RG_R1, 0, fill_or_stroke); + Geom::LineSegment ls(begin, end); + double offset = ls.nearestTime(mouse_p); + Geom::Point nearest = ls.pointAt(offset); + double dist_screen = Geom::distance(mouse_p, nearest); + if ( dist_screen < tolerance ) { + // calculate the new stop offset + new_stop_offset = distance(begin, nearest) / distance(begin, end); + // add the knot + addknot = true; + //r1_knot = true; + } else { + end = getGradientCoords(item, POINT_RG_R2, 0, fill_or_stroke); + ls = Geom::LineSegment(begin, end); + offset = ls.nearestTime(mouse_p); + nearest = ls.pointAt(offset); + dist_screen = Geom::distance(mouse_p, nearest); + if ( dist_screen < tolerance ) { + // calculate the new stop offset + new_stop_offset = distance(begin, nearest) / distance(begin, end); + // add the knot + addknot = true; + //r1_knot = false; + } + } + } else if (SP_IS_MESHGRADIENT(gradient)) { + + // add_stop_near_point() + // Find out which curve pointer is over and use that curve to determine + // which row or column will be divided. + // This is silly as we already should know which line we are over... + // but that information is not saved (sp_gradient_context_is_over_line). + + SPMeshGradient *mg = SP_MESHGRADIENT(gradient); + Geom::Affine transform = Geom::Affine(mg->gradientTransform)*(Geom::Affine)item->i2dt_affine(); + + guint rows = mg->array.patch_rows(); + guint columns = mg->array.patch_columns(); + + double closest = 1e10; + for( guint i = 0; i < rows; ++i ) { + for( guint j = 0; j < columns; ++j ) { + + SPMeshPatchI patch( &(mg->array.nodes), i, j ); + Geom::Point p[4]; + + // Top line + { + p[0] = patch.getPoint( 0, 0 ) * transform; + p[1] = patch.getPoint( 0, 1 ) * transform; + p[2] = patch.getPoint( 0, 2 ) * transform; + p[3] = patch.getPoint( 0, 3 ) * transform; + Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] ); + Geom::Coord coord = b.nearestTime( mouse_p ); + Geom::Point nearest = b( coord ); + double dist_screen = Geom::L2 ( mouse_p - nearest ); + if ( dist_screen < closest ) { + closest = dist_screen; + divide_row = -1; + divide_column = j; + divide_coord = coord; + } + } + + // Right line (only for last column) + if( j == columns - 1 ) { + p[0] = patch.getPoint( 1, 0 ) * transform; + p[1] = patch.getPoint( 1, 1 ) * transform; + p[2] = patch.getPoint( 1, 2 ) * transform; + p[3] = patch.getPoint( 1, 3 ) * transform; + Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] ); + Geom::Coord coord = b.nearestTime( mouse_p ); + Geom::Point nearest = b( coord ); + double dist_screen = Geom::L2 ( mouse_p - nearest ); + if ( dist_screen < closest ) { + closest = dist_screen; + divide_row = i; + divide_column = -1; + divide_coord = coord; + } + } + + // Bottom line (only for last row) + if( i == rows - 1 ) { + p[0] = patch.getPoint( 2, 0 ) * transform; + p[1] = patch.getPoint( 2, 1 ) * transform; + p[2] = patch.getPoint( 2, 2 ) * transform; + p[3] = patch.getPoint( 2, 3 ) * transform; + Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] ); + Geom::Coord coord = b.nearestTime( mouse_p ); + Geom::Point nearest = b( coord ); + double dist_screen = Geom::L2 ( mouse_p - nearest ); + if ( dist_screen < closest ) { + closest = dist_screen; + divide_row = -1; + divide_column = j; + divide_coord = 1.0 - coord; + } + } + + // Left line + { + p[0] = patch.getPoint( 3, 0 ) * transform; + p[1] = patch.getPoint( 3, 1 ) * transform; + p[2] = patch.getPoint( 3, 2 ) * transform; + p[3] = patch.getPoint( 3, 3 ) * transform; + Geom::BezierCurveN<3> b( p[0], p[1], p[2], p[3] ); + Geom::Coord coord = b.nearestTime( mouse_p ); + Geom::Point nearest = b( coord ); + double dist_screen = Geom::L2 ( mouse_p - nearest ); + if ( dist_screen < closest ) { + closest = dist_screen; + divide_row = i; + divide_column = -1; + divide_coord = 1.0 - coord; + } + } + + } // End loop over columns + } // End loop rows + + if( closest < tolerance ) { + addknot = true; + } + + } // End if mesh + + } + + if (addknot) { + + if( SP_IS_LINEARGRADIENT(gradient) || SP_IS_RADIALGRADIENT( gradient ) ) { + SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false); + SPStop* prev_stop = vector->getFirstStop(); + SPStop* next_stop = prev_stop->getNextStop(); + guint i = 1; + while ( (next_stop) && (next_stop->offset < new_stop_offset) ) { + prev_stop = next_stop; + next_stop = next_stop->getNextStop(); + i++; + } + if (!next_stop) { + // logical error: the endstop should have offset 1 and should always be more than this offset here + return nullptr; + } + + + SPStop *newstop = sp_vector_add_stop (vector, prev_stop, next_stop, new_stop_offset); + gradient->ensureVector(); + updateDraggers(); + + // so that it does not automatically update draggers in idle loop, as this would deselect + local_change = true; + + // select the newly created stop + selectByStop(newstop); + + return newstop; + + } else { + + SPMeshGradient *mg = SP_MESHGRADIENT(gradient); + + if( divide_row > -1 ) { + mg->array.split_row( divide_row, divide_coord ); + } else { + mg->array.split_column( divide_column, divide_coord ); + } + + // Update repr + mg->array.write( mg ); + mg->array.built = false; + mg->ensureArray(); + // How do we do this? + DocumentUndo::done(desktop->getDocument(), _("Added patch row or column"), INKSCAPE_ICON("mesh-gradient")); + + } // Mesh + } + + return nullptr; +} + + +bool GrDrag::dropColor(SPItem */*item*/, gchar const *c, Geom::Point p) +{ + // Note: not sure if a null pointer can come in for the style, but handle that just in case + bool stopIsNull = false; + Glib::ustring toUse = makeStopSafeColor( c, stopIsNull ); + + // first, see if we can drop onto one of the existing draggers + for(auto d : draggers) { //for all draggers + if (Geom::L2(p - d->point)*desktop->current_zoom() < 5) { + SPCSSAttr *stop = sp_repr_css_attr_new (); + sp_repr_css_set_property( stop, "stop-color", stopIsNull ? nullptr : toUse.c_str() ); + sp_repr_css_set_property( stop, "stop-opacity", "1" ); + for(auto draggable : d->draggables) { //for all draggables of dragger + local_change = true; + sp_item_gradient_stop_set_style (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke, stop); + } + sp_repr_css_attr_unref(stop); + return true; + } + } + + // now see if we're over line and create a new stop + for (auto curve : item_curves) { + if (curve->is_line() && curve->get_item() && curve->contains(p, 5)) { + SPStop *stop = addStopNearPoint(curve->get_item(), p, 5/desktop->current_zoom()); + if (stop) { + SPCSSAttr *css = sp_repr_css_attr_new(); + sp_repr_css_set_property( css, "stop-color", stopIsNull ? nullptr : toUse.c_str() ); + sp_repr_css_set_property( css, "stop-opacity", "1" ); + sp_repr_css_change(stop->getRepr(), css, "style"); + return true; + } + } + } + + return false; +} + + +GrDrag::GrDrag(SPDesktop *desktop) : + keep_selection(false), + local_change(false), + desktop(desktop), + hor_levels(), + vert_levels(), + draggers(0), + selection(desktop->getSelection()), + sel_changed_connection(), + sel_modified_connection(), + style_set_connection(), + style_query_connection() +{ + sel_changed_connection = selection->connectChangedFirst( + sigc::bind( + sigc::ptr_fun(&gr_drag_sel_changed), + (gpointer)this ) + + ); + sel_modified_connection = selection->connectModifiedFirst( + sigc::bind( + sigc::ptr_fun(&gr_drag_sel_modified), + (gpointer)this ) + ); + + style_set_connection = desktop->connectSetStyleEx( sigc::mem_fun(*this, &GrDrag::styleSet) ); + + style_query_connection = desktop->connectQueryStyle( + sigc::bind( + sigc::ptr_fun(&gr_drag_style_query), + (gpointer)this ) + ); + + updateDraggers(); + updateLines(); + updateLevels(); + + if (desktop->gr_item) { + GrDragger *dragger = getDraggerFor(desktop->gr_item, desktop->gr_point_type, desktop->gr_point_i, desktop->gr_fill_or_stroke); + if (dragger) { + setSelected(dragger); + } + } +} + +GrDrag::~GrDrag() +{ + this->sel_changed_connection.disconnect(); + this->sel_modified_connection.disconnect(); + this->style_set_connection.disconnect(); + this->style_query_connection.disconnect(); + + if (! this->selected.empty()) { + GrDraggable *draggable = (*(this->selected.begin()))->draggables[0]; + desktop->gr_item = draggable->item; + desktop->gr_point_type = draggable->point_type; + desktop->gr_point_i = draggable->point_i; + desktop->gr_fill_or_stroke = draggable->fill_or_stroke; + } else { + desktop->gr_item = nullptr; + desktop->gr_point_type = POINT_LG_BEGIN; + desktop->gr_point_i = 0; + desktop->gr_fill_or_stroke = Inkscape::FOR_FILL; + } + + deselect_all(); + for (auto dragger : this->draggers) { + delete dragger; + } + this->draggers.clear(); + this->selected.clear(); + + for (auto curve : item_curves) { + delete curve; + } + item_curves.clear(); +} + +GrDraggable::GrDraggable(SPItem *item, GrPointType point_type, guint point_i, Inkscape::PaintTarget fill_or_stroke) : + item(item), + point_type(point_type), + point_i(point_i), + fill_or_stroke(fill_or_stroke) +{ + //g_object_ref(G_OBJECT(item)); + sp_object_ref(item); +} + +GrDraggable::~GrDraggable() +{ + //g_object_unref (G_OBJECT (this->item)); + sp_object_unref(this->item); +} + + +SPObject *GrDraggable::getServer() +{ + SPObject *server = nullptr; + if (item) { + switch (fill_or_stroke) { + case Inkscape::FOR_FILL: + server = item->style->getFillPaintServer(); + break; + case Inkscape::FOR_STROKE: + server = item->style->getStrokePaintServer(); + break; + } + } + + return server; +} + +static void gr_knot_moved_handler(SPKnot *knot, Geom::Point const &ppointer, guint state, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + + // Dragger must have at least one draggable + GrDraggable *draggable = (GrDraggable *) dragger->draggables[0]; + if (!draggable) return; + + // Find mesh corner that corresponds to dragger (only checks first draggable) and highlight it. + GrDragger *dragger_corner = dragger->getMgCorner(); + if (dragger_corner) { + dragger_corner->highlightCorner(true); + } + + // Set-up snapping + SPDesktop *desktop = dragger->parent->desktop; + SnapManager &m = desktop->namedview->snap_manager; + double snap_dist = m.snapprefs.getObjectTolerance() / dragger->parent->desktop->current_zoom(); + + Geom::Point p = ppointer; + + if (state & GDK_SHIFT_MASK) { + // with Shift; unsnap if we carry more than one draggable + if (dragger->draggables.size()>1) { + // create a new dragger + GrDragger *dr_new = new GrDragger (dragger->parent, dragger->point, nullptr); + dragger->parent->draggers.insert(dragger->parent->draggers.begin(), dr_new); + // relink to it all but the first draggable in the list + std::vector<GrDraggable *>::const_iterator i = dragger->draggables.begin(); + for ( ++i ; i != dragger->draggables.end(); ++i ) { + GrDraggable *draggable = *i; + dr_new->addDraggable (draggable); + } + dr_new->updateKnotShape(); + if(dragger->draggables.size()>1){ + GrDraggable *tmp = dragger->draggables[0]; + dragger->draggables.clear(); + dragger->draggables.push_back(tmp); + } + dragger->updateKnotShape(); + dragger->updateTip(); + } + } else if (!(state & GDK_CONTROL_MASK)) { + // without Shift or Ctrl; see if we need to snap to another dragger + for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin(); di != dragger->parent->draggers.end() ; ++di) { + GrDragger *d_new = *di; + if (dragger->mayMerge(d_new) && Geom::L2 (d_new->point - p) < snap_dist) { + + // Merge draggers: + for (auto draggable : dragger->draggables) { + // copy draggable to d_new: + GrDraggable *da_new = new GrDraggable (draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); + d_new->addDraggable (da_new); + } + + // unlink and delete this dragger + dragger->parent->draggers.erase(std::remove(dragger->parent->draggers.begin(),dragger->parent->draggers.end(), dragger),dragger->parent->draggers.end()); + d_new->parent->draggers.erase(std::remove(d_new->parent->draggers.begin(),d_new->parent->draggers.end(), dragger),d_new->parent->draggers.end()); + d_new->parent->selected.erase(dragger); + delete dragger; + + // throw out delayed snap context + desktop->event_context->discard_delayed_snap_event(); + + // update the new merged dragger + d_new->fireDraggables(true, false, true); + d_new->parent->updateLines(); + d_new->parent->setSelected (d_new); + d_new->updateKnotShape (); + d_new->updateTip (); + d_new->updateDependencies(true); + DocumentUndo::done(d_new->parent->desktop->getDocument(), _("Merge gradient handles"), INKSCAPE_ICON("color-gradient")); + return; + } + } + } + + if (!((state & GDK_SHIFT_MASK) || (state & GDK_CONTROL_MASK))) { + m.setup(desktop); + Inkscape::SnappedPoint s = m.freeSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE)); + m.unSetup(); + if (s.getSnapped()) { + p = s.getPoint(); + knot->moveto(p); + } + } else if (state & GDK_CONTROL_MASK) { + IntermSnapResults isr; + Inkscape::SnapCandidatePoint scp = Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + unsigned snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12)); + /* 0 means no snapping. */ + + for (std::vector<GrDraggable *>::const_iterator i = dragger->draggables.begin(); i != dragger->draggables.end(); ++i) { + GrDraggable *draggable = *i; + + Geom::Point dr_snap(Geom::infinity(), Geom::infinity()); + + if (draggable->point_type == POINT_LG_BEGIN || draggable->point_type == POINT_LG_END) { + for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin() ; di != dragger->parent->draggers.end() ; ++di) { + GrDragger *d_new = *di; + if (d_new == dragger) + continue; + if (d_new->isA (draggable->item, + draggable->point_type == POINT_LG_BEGIN? POINT_LG_END : POINT_LG_BEGIN, + draggable->fill_or_stroke)) { + // found the other end of the linear gradient; + if (state & GDK_SHIFT_MASK) { + // moving linear around center + Geom::Point center = Geom::Point (0.5*(d_new->point + dragger->point)); + dr_snap = center; + } else { + // moving linear around the other end + dr_snap = d_new->point; + } + } + } + } else if (draggable->point_type == POINT_RG_R1 || draggable->point_type == POINT_RG_R2 || draggable->point_type == POINT_RG_FOCUS) { + for (std::vector<GrDragger *>::const_iterator di = dragger->parent->draggers.begin(); di != dragger->parent->draggers.end(); ++di) { + GrDragger *d_new = *di; + if (d_new == dragger) + continue; + if (d_new->isA (draggable->item, + POINT_RG_CENTER, + draggable->fill_or_stroke)) { + // found the center of the radial gradient; + dr_snap = d_new->point; + } + } + } else if (draggable->point_type == POINT_RG_CENTER) { + // radial center snaps to hor/vert relative to its original position + dr_snap = dragger->point_original; + } else if (draggable->point_type == POINT_MG_CORNER || + draggable->point_type == POINT_MG_HANDLE || + draggable->point_type == POINT_MG_TENSOR ) { + // std::cout << " gr_knot_moved_handler: Got mesh point!" << std::endl; + } + + // dr_snap contains the origin of the gradient, whereas p will be the new endpoint which we will try to snap now + Inkscape::SnappedPoint sp; + if (dr_snap.isFinite()) { + m.setup(desktop); + if (state & GDK_MOD1_MASK) { + // with Alt, snap to the original angle and its perpendiculars + sp = m.constrainedAngularSnap(scp, dragger->point_original, dr_snap, 2); + } else { + // with Ctrl, snap to M_PI/snaps + sp = m.constrainedAngularSnap(scp, std::optional<Geom::Point>(), dr_snap, snaps); + } + m.unSetup(); + isr.points.push_back(sp); + } + } + + m.setup(desktop, false); // turn of the snap indicator temporarily + Inkscape::SnappedPoint bsp = m.findBestSnap(scp, isr, true); + m.unSetup(); + if (!bsp.getSnapped()) { + // If we didn't truly snap to an object or to a grid, then we will still have to look for the + // closest projection onto one of the constraints. findBestSnap() will not do this for us + for (std::list<Inkscape::SnappedPoint>::const_iterator i = isr.points.begin(); i != isr.points.end(); ++i) { + if (i == isr.points.begin() || (Geom::L2((*i).getPoint() - p) < Geom::L2(bsp.getPoint() - p))) { + bsp.setPoint((*i).getPoint()); + bsp.setTarget(Inkscape::SNAPTARGET_CONSTRAINED_ANGLE); + } + } + } + //p = isr.points.front().getPoint(); + p = bsp.getPoint(); + knot->moveto(p); + } + + GrDrag *drag = dragger->parent; // There is just one GrDrag. + drag->keep_selection = (drag->selected.find(dragger)!=drag->selected.end()); + bool scale_radial = (state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK); + + if (drag->keep_selection) { + Geom::Point diff = p - dragger->point; + drag->selected_move_nowrite (diff[Geom::X], diff[Geom::Y], scale_radial); + } else { + Geom::Point p_old = dragger->point; + dragger->point = p; + dragger->fireDraggables (false, scale_radial); + dragger->updateDependencies(false); + dragger->moveMeshHandles( p_old, MG_NODE_NO_SCALE ); + } +} + + +static void gr_midpoint_limits(GrDragger *dragger, SPObject *server, Geom::Point *begin, Geom::Point *end, Geom::Point *low_lim, Geom::Point *high_lim, std::vector<GrDragger *> &moving) +{ + + GrDrag *drag = dragger->parent; + // a midpoint dragger can (logically) only contain one GrDraggable + GrDraggable *draggable = dragger->draggables[0]; + + // get begin and end points between which dragging is allowed: + // the draglimits are between knot(lowest_i - 1) and knot(highest_i + 1) + moving.push_back(dragger); + + guint lowest_i = draggable->point_i; + guint highest_i = draggable->point_i; + GrDragger *lowest_dragger = dragger; + GrDragger *highest_dragger = dragger; + if (dragger->isSelected()) { + GrDragger* d_add; + while ( true ) + { + d_add = drag->getDraggerFor(draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke); + if ( d_add && drag->selected.find(d_add)!=drag->selected.end() ) { + lowest_i = lowest_i - 1; + moving.insert(moving.begin(),d_add); + lowest_dragger = d_add; + } else { + break; + } + } + + while ( true ) + { + d_add = drag->getDraggerFor(draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke); + if ( d_add && drag->selected.find(d_add)!=drag->selected.end() ) { + highest_i = highest_i + 1; + moving.push_back(d_add); + highest_dragger = d_add; + } else { + break; + } + } + } + + if ( SP_IS_LINEARGRADIENT(server) ) { + guint num = SP_LINEARGRADIENT(server)->vector.stops.size(); + GrDragger *d_temp; + if (lowest_i == 1) { + d_temp = drag->getDraggerFor (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke); + } else { + d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, lowest_i - 1, draggable->fill_or_stroke); + } + if (d_temp) + *begin = d_temp->point; + + d_temp = drag->getDraggerFor (draggable->item, POINT_LG_MID, highest_i + 1, draggable->fill_or_stroke); + if (d_temp == nullptr) { + d_temp = drag->getDraggerFor (draggable->item, POINT_LG_END, num-1, draggable->fill_or_stroke); + } + if (d_temp) + *end = d_temp->point; + } else if ( SP_IS_RADIALGRADIENT(server) ) { + guint num = SP_RADIALGRADIENT(server)->vector.stops.size(); + GrDragger *d_temp; + if (lowest_i == 1) { + d_temp = drag->getDraggerFor (draggable->item, POINT_RG_CENTER, 0, draggable->fill_or_stroke); + } else { + d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, lowest_i - 1, draggable->fill_or_stroke); + } + if (d_temp) + *begin = d_temp->point; + + d_temp = drag->getDraggerFor (draggable->item, draggable->point_type, highest_i + 1, draggable->fill_or_stroke); + if (d_temp == nullptr) { + d_temp = drag->getDraggerFor (draggable->item, (draggable->point_type==POINT_RG_MID1) ? POINT_RG_R1 : POINT_RG_R2, num-1, draggable->fill_or_stroke); + } + if (d_temp) + *end = d_temp->point; + } + + *low_lim = dragger->point - (lowest_dragger->point - *begin); + *high_lim = dragger->point - (highest_dragger->point - *end); +} + +/** + * Called when a midpoint knot is dragged. + */ +static void gr_knot_moved_midpoint_handler(SPKnot */*knot*/, Geom::Point const &ppointer, guint state, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + GrDrag *drag = dragger->parent; + // a midpoint dragger can (logically) only contain one GrDraggable + GrDraggable *draggable = dragger->draggables[0]; + + // FIXME: take from prefs + double snap_fraction = 0.1; + + Geom::Point p = ppointer; + Geom::Point begin(0,0), end(0,0); + Geom::Point low_lim(0,0), high_lim(0,0); + + SPObject *server = draggable->getServer(); + + std::vector<GrDragger *> moving; + gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, moving); + + if (state & GDK_CONTROL_MASK) { + Geom::LineSegment ls(low_lim, high_lim); + p = ls.pointAt(round(ls.nearestTime(p) / snap_fraction) * snap_fraction); + } else { + Geom::LineSegment ls(low_lim, high_lim); + p = ls.pointAt(ls.nearestTime(p)); + if (!(state & GDK_SHIFT_MASK)) { + Inkscape::Snapper::SnapConstraint cl(low_lim, high_lim - low_lim); + SPDesktop *desktop = dragger->parent->desktop; + SnapManager &m = desktop->namedview->snap_manager; + m.setup(desktop); + m.constrainedSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE, cl); + m.unSetup(); + } + } + Geom::Point displacement = p - dragger->point; + + for (auto drg : moving) { + SPKnot *drgknot = drg->knot; + Geom::Point this_move = displacement; + if (state & GDK_MOD1_MASK) { + // FIXME: unify all these profiles (here, in nodepath, in tweak) in one place + double alpha = 1.0; + if (Geom::L2(drg->point - dragger->point) + Geom::L2(drg->point - begin) - 1e-3 > Geom::L2(dragger->point - begin)) { // drg is on the end side from dragger + double x = Geom::L2(drg->point - dragger->point)/Geom::L2(end - dragger->point); + this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move; + } else { // drg is on the begin side from dragger + double x = Geom::L2(drg->point - dragger->point)/Geom::L2(begin - dragger->point); + this_move = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5) * this_move; + } + } + drg->point += this_move; + drgknot->moveto(drg->point); + drg->fireDraggables (false); + drg->updateDependencies(false); + } + + drag->keep_selection = dragger->isSelected(); +} + + + +static void gr_knot_mousedown_handler(SPKnot */*knot*/, unsigned int /*state*/, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + GrDrag *drag = dragger->parent; + + // Turn off all mesh handle highlighting + for(auto d : drag->draggers) { //for all selected draggers + d->highlightCorner(false); + } + + // Highlight only mesh corner corresponding to grabbed corner or handle + GrDragger *dragger_corner = dragger->getMgCorner(); + if (dragger_corner) { + dragger_corner->highlightCorner(true); + } +} + +/** + * Called when the mouse releases a dragger knot; changes gradient writing to repr, updates other draggers if needed. + */ +static void gr_knot_ungrabbed_handler(SPKnot *knot, unsigned int state, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + + dragger->point_original = dragger->point = knot->pos; + + if ((state & GDK_CONTROL_MASK) && (state & GDK_SHIFT_MASK)) { + dragger->fireDraggables (true, true); + } else { + dragger->fireDraggables (true); + } + dragger->moveMeshHandles( dragger->point_original, MG_NODE_NO_SCALE ); + + for (std::set<GrDragger *>::const_iterator it = dragger->parent->selected.begin(); it != dragger->parent->selected.end() ; ++it ) { + if (*it == dragger) + continue; + (*it)->fireDraggables (true); + } + + // make this dragger selected + if (!dragger->parent->keep_selection) { + dragger->parent->setSelected (dragger); + } + dragger->parent->keep_selection = false; + + dragger->updateDependencies(true); + + // we did an undoable action + DocumentUndo::done(dragger->parent->desktop->getDocument(), _("Move gradient handle"), INKSCAPE_ICON("color-gradient")); +} + +/** + * Called when a dragger knot is clicked; selects the dragger or deletes it depending on the + * state of the keyboard keys. + */ +static void gr_knot_clicked_handler(SPKnot */*knot*/, guint state, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + GrDraggable *draggable = dragger->draggables[0]; + if (!draggable) return; + + if ( (state & GDK_CONTROL_MASK) && (state & GDK_MOD1_MASK ) ) { + // delete this knot from vector + SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke); + gradient = gradient->getVector(); + if (gradient->vector.stops.size() > 2) { // 2 is the minimum + SPStop *stop = nullptr; + switch (draggable->point_type) { // if we delete first or last stop, move the next/previous to the edge + + case POINT_LG_BEGIN: + case POINT_RG_CENTER: + stop = gradient->getFirstStop(); + { + SPStop *next = stop->getNextStop(); + if (next) { + next->offset = 0; + next->getRepr()->setAttributeCssDouble("offset", 0); + } + } + break; + + case POINT_LG_END: + case POINT_RG_R1: + case POINT_RG_R2: + stop = sp_last_stop(gradient); + { + SPStop *prev = stop->getPrevStop(); + if (prev) { + prev->offset = 1; + prev->getRepr()->setAttributeCssDouble("offset", 1); + } + } + break; + + case POINT_LG_MID: + case POINT_RG_MID1: + case POINT_RG_MID2: + stop = sp_get_stop_i(gradient, draggable->point_i); + break; + + default: + return; + + } + + gradient->getRepr()->removeChild(stop->getRepr()); + DocumentUndo::done(gradient->document, _("Delete gradient stop"), INKSCAPE_ICON("color-gradient")); + } + } else { + // select the dragger + + dragger->point_original = dragger->point; + + if ( state & GDK_SHIFT_MASK ) { + dragger->parent->setSelected (dragger, true, false); + } else { + dragger->parent->setSelected (dragger); + } + } +} + +/** + * Called when a dragger knot is doubleclicked; + */ +static void gr_knot_doubleclicked_handler(SPKnot */*knot*/, guint /*state*/, gpointer data) +{ + GrDragger *dragger = (GrDragger *) data; + + dragger->point_original = dragger->point; + + if (dragger->draggables.empty()) + return; +} + +/** + * Act upon all draggables of the dragger, setting them to the dragger's point. + */ +void GrDragger::fireDraggables(bool write_repr, bool scale_radial, bool merging_focus) +{ + for (auto draggable : this->draggables) { + // set local_change flag so that selection_changed callback does not regenerate draggers + this->parent->local_change = true; + + // change gradient, optionally writing to repr; prevent focus from moving if it's snapped + // to the center, unless it's the first update upon merge when we must snap it to the point + if (merging_focus || + !(draggable->point_type == POINT_RG_FOCUS && this->isA(draggable->item, POINT_RG_CENTER, draggable->point_i, draggable->fill_or_stroke))) + { + sp_item_gradient_set_coords (draggable->item, draggable->point_type, draggable->point_i, this->point, draggable->fill_or_stroke, write_repr, scale_radial); + } + } +} + +// TODO: REMOVE THIS +void GrDragger::updateControlSizesOverload(SPKnot * knot) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + int size = prefs->getIntLimited("/options/grabsize/value", 3, 1, 15); + + // shadow what's done in CanvasItemCtrl::set_size_via_index; + // TODO: code should likely be merged + int knot_size = size * 2 + 3; + if(knot->shape == Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE) { + knot_size = size * 8 + 1; + } + + knot->setSize(knot_size); +} + +void GrDragger::updateControlSizes() +{ + updateControlSizesOverload(this->knot); + this->knot->updateCtrl(); + this->updateKnotShape(); +} + +/** + * Checks if the dragger has a draggable with this point_type. + */ +bool GrDragger::isA(GrPointType point_type) +{ + for (auto draggable : this->draggables) { + if (draggable->point_type == point_type) { + return true; + } + } + return false; +} + +/** + * Checks if the dragger has a draggable with this item, point_type + point_i (number), fill_or_stroke. + */ +bool GrDragger::isA(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke) +{ + for (auto draggable : this->draggables) { + if ( (draggable->point_type == point_type) && (draggable->point_i == point_i) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) { + return true; + } + } + return false; +} + +/** + * Checks if the dragger has a draggable with this item, point_type, fill_or_stroke. + */ +bool GrDragger::isA(SPItem *item, GrPointType point_type, Inkscape::PaintTarget fill_or_stroke) +{ + for (auto draggable : this->draggables) { + if ( (draggable->point_type == point_type) && (draggable->item == item) && (draggable->fill_or_stroke == fill_or_stroke) ) { + return true; + } + } + return false; +} + +bool GrDraggable::mayMerge(GrDraggable *da2) +{ + if ((this->item == da2->item) && (this->fill_or_stroke == da2->fill_or_stroke)) { + // we must not merge the points of the same gradient! + if (!((this->point_type == POINT_RG_FOCUS && da2->point_type == POINT_RG_CENTER) || + (this->point_type == POINT_RG_CENTER && da2->point_type == POINT_RG_FOCUS))) { + // except that we can snap center and focus together + return false; + } + } + // disable merging of midpoints. + if ( (this->point_type == POINT_LG_MID) || (da2->point_type == POINT_LG_MID) + || (this->point_type == POINT_RG_MID1) || (da2->point_type == POINT_RG_MID1) + || (this->point_type == POINT_RG_MID2) || (da2->point_type == POINT_RG_MID2) ) + return false; + + return true; +} + +bool GrDragger::mayMerge(GrDragger *other) +{ + if (this == other) + return false; + + for (auto da1 : this->draggables) { + for (auto da2 : other->draggables) { + if (!da1->mayMerge(da2)) + return false; + } + } + return true; +} + +bool GrDragger::mayMerge(GrDraggable *da2) +{ + for (auto da1 : this->draggables) { + if (!da1->mayMerge(da2)) + return false; + } + return true; +} + +/** + * Update mesh handles when mesh corner is moved. + * pc_old: old position of corner (could be changed to dp if we figure out transforms). + * op: how other nodes (handles, tensors) should be moved. + * Scaling takes place only between a selected and an unselected corner, + * other wise a handle is displaced the same distance as the adjacent corner. + * If a side is a line, then the handles are always placed 1/3 of side length + * from each corner. + * + * Ooops, needs to be reimplemented. + */ +void +GrDragger::moveMeshHandles ( Geom::Point pc_old, MeshNodeOperation op ) +{ + // This routine might more properly be in mesh-context.cpp but moving knots is + // handled here rather than there. + + // We need to update two places: + // 1. In SPMeshArrayI with object coordinates + // 2. In Drager/Knots with desktop coordinates. + + // This routine is more complicated than it might need to be inorder to allow + // corner points to be selected in multiple meshes at the same time... with some + // sharing the same dragger (overkill, perhaps?). + + // If no corner point in GrDragger then do nothing. + if( !isA (POINT_MG_CORNER ) ) return; + + GrDrag *drag = this->parent; + + // We need a list of selected corners per mesh if scaling. + std::map<SPGradient*, std::vector<guint> > selected_corners; + // scaling was disabled so #if 0'ing out for now. +#if 0 + const bool scale = false; + if( scale ) { + + for( std::set<GrDragger *>::const_iterator it = drag->selected.begin(); it != drag->selected.end(); ++it ) { + GrDragger *dragger = *it; + for (std::vector<GrDraggable *>::const_iterator it2 = dragger->draggables.begin(); it2 != dragger->draggables.end(); ++it2 ) { + GrDraggable *draggable = *it2; + + // Check draggable is of type POINT_MG_CORNER (don't allow selection of POINT_MG_HANDLE) + if( draggable->point_type != POINT_MG_CORNER ) continue; + + // Must be a mesh gradient + SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke); + if ( !SP_IS_MESHGRADIENT( gradient ) ) continue; + + selected_corners[ gradient ].push_back( draggable->point_i ); + } + } + } +#endif + + // Now we do the handle moves. + + // Loop over all draggables in moved corner + std::map<SPGradient*, std::vector<guint> > dragger_corners; + for (auto draggable : draggables) { + SPItem *item = draggable->item; + gint point_type = draggable->point_type; + gint point_i = draggable->point_i; + Inkscape::PaintTarget + fill_or_stroke = draggable->fill_or_stroke; + + // Check draggable is of type POINT_MG_CORNER (don't allow selection of POINT_MG_HANDLE) + if( point_type != POINT_MG_CORNER ) continue; + + // Must be a mesh gradient + SPGradient *gradient = getGradient(item, fill_or_stroke); + if ( !SP_IS_MESHGRADIENT( gradient ) ) continue; + SPMeshGradient *mg = SP_MESHGRADIENT( gradient ); + + // pc_old is the old corner position in desktop coordinates, we need it in gradient coordinate. + gradient = sp_gradient_convert_to_userspace (gradient, item, (fill_or_stroke == Inkscape::FOR_FILL) ? "fill" : "stroke"); + Geom::Affine i2d ( item->i2dt_affine() ); + Geom::Point pcg_old = pc_old * i2d.inverse(); + pcg_old *= (gradient->gradientTransform).inverse(); + + mg->array.update_handles( point_i, selected_corners[ gradient ], pcg_old, op ); + mg->array.write( mg ); + + // Move on-screen knots + for( guint i = 0; i < mg->array.handles.size(); ++i ) { + GrDragger *handle = drag->getDraggerFor( item, POINT_MG_HANDLE, i, fill_or_stroke ); + SPKnot *knot = handle->knot; + Geom::Point pk = getGradientCoords( item, POINT_MG_HANDLE, i, fill_or_stroke ); + knot->moveto(pk); + + } + + for( guint i = 0; i < mg->array.tensors.size(); ++i ) { + + GrDragger *handle = drag->getDraggerFor( item, POINT_MG_TENSOR, i, fill_or_stroke ); + SPKnot *knot = handle->knot; + Geom::Point pk = getGradientCoords( item, POINT_MG_TENSOR, i, fill_or_stroke ); + knot->moveto(pk); + + } + + } // Loop over draggables. +} + + +/** + * Updates the statusbar tip of the dragger knot, based on its draggables. + */ +void GrDragger::updateTip() +{ + g_return_if_fail(this->knot != nullptr); + + if (this->knot && this->knot->tip) { + g_free (this->knot->tip); + this->knot->tip = nullptr; + } + + if (this->draggables.size() == 1) { + GrDraggable *draggable = this->draggables[0]; + char *item_desc = draggable->item->detailedDescription(); + switch (draggable->point_type) { + case POINT_LG_MID: + case POINT_RG_MID1: + case POINT_RG_MID2: + this->knot->tip = g_strdup_printf (_("%s %d for: %s%s; drag with <b>Ctrl</b> to snap offset; click with <b>Ctrl+Alt</b> to delete stop"), + _(gr_knot_descr[draggable->point_type]), + draggable->point_i, + item_desc, + (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : ""); + break; + + case POINT_MG_CORNER: + case POINT_MG_HANDLE: + case POINT_MG_TENSOR: + this->knot->tip = g_strdup_printf (_("%s for: %s%s"), + _(gr_knot_descr[draggable->point_type]), + item_desc, + (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : ""); + break; + + default: + this->knot->tip = g_strdup_printf (_("%s for: %s%s; drag with <b>Ctrl</b> to snap angle, with <b>Ctrl+Alt</b> to preserve angle, with <b>Ctrl+Shift</b> to scale around center"), + _(gr_knot_descr[draggable->point_type]), + item_desc, + (draggable->fill_or_stroke == Inkscape::FOR_STROKE) ? _(" (stroke)") : ""); + break; + } + g_free(item_desc); + } else if (draggables.size() == 2 && isA (POINT_RG_CENTER) && isA (POINT_RG_FOCUS)) { + this->knot->tip = g_strdup_printf ("%s", _("Radial gradient <b>center</b> and <b>focus</b>; drag with <b>Shift</b> to separate focus")); + } else { + int length = this->draggables.size(); + this->knot->tip = g_strdup_printf (ngettext("Gradient point shared by <b>%d</b> gradient; drag with <b>Shift</b> to separate", + "Gradient point shared by <b>%d</b> gradients; drag with <b>Shift</b> to separate", + length), + length); + } +} + +/** + * Adds a draggable to the dragger. + */ +void GrDragger::updateKnotShape() +{ + if (draggables.empty()) + return; + GrDraggable *last = draggables.back(); + + this->knot->ctrl->set_shape(gr_knot_shapes[last->point_type]); + + // For highlighting mesh handles corresponding to selected corner + if (this->knot->shape == Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE) { + this->knot->setFill(GR_KNOT_COLOR_HIGHLIGHT, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER); + if (gr_knot_shapes[last->point_type] == Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE) { + this->knot->ctrl->set_shape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE); + } + } +} + +/** + * Adds a draggable to the dragger. + */ +void GrDragger::addDraggable(GrDraggable *draggable) +{ + this->draggables.insert(this->draggables.begin(), draggable); + + this->updateTip(); +} + + +/** + * Moves this dragger to the point of the given draggable, acting upon all other draggables. + */ +void GrDragger::moveThisToDraggable(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, bool write_repr) +{ + if (draggables.empty()) + return; + + GrDraggable *dr_first = draggables[0]; + + this->point = getGradientCoords(dr_first->item, dr_first->point_type, dr_first->point_i, dr_first->fill_or_stroke); + this->point_original = this->point; + + this->knot->moveto(this->point); + + for (auto da : draggables) { + if ( (da->item == item) && + (da->point_type == point_type) && + (point_i == -1 || da->point_i == point_i) && + (da->fill_or_stroke == fill_or_stroke) ) { + // Don't move initial draggable + continue; + } + sp_item_gradient_set_coords(da->item, da->point_type, da->point_i, this->point, da->fill_or_stroke, write_repr, false); + } + // FIXME: here we should also call this->updateDependencies(write_repr); to propagate updating, but how to prevent loops? +} + + +/** + * Moves all midstop draggables that depend on this one. + */ +void GrDragger::updateMidstopDependencies(GrDraggable *draggable, bool write_repr) +{ + SPObject *server = draggable->getServer(); + if (!server) + return; + guint num = SP_GRADIENT(server)->vector.stops.size(); + if (num <= 2) return; + + if ( SP_IS_LINEARGRADIENT(server) ) { + for ( guint i = 1; i < num - 1; i++ ) { + this->moveOtherToDraggable (draggable->item, POINT_LG_MID, i, draggable->fill_or_stroke, write_repr); + } + } else if ( SP_IS_RADIALGRADIENT(server) ) { + for ( guint i = 1; i < num - 1; i++ ) { + this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, i, draggable->fill_or_stroke, write_repr); + this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, i, draggable->fill_or_stroke, write_repr); + } + } +} + + +/** + * Moves all draggables that depend on this one. + */ +void GrDragger::updateDependencies(bool write_repr) +{ + for (auto draggable : draggables) { + switch (draggable->point_type) { + case POINT_LG_BEGIN: + { + // the end point is dependent only when dragging with ctrl+shift + this->moveOtherToDraggable (draggable->item, POINT_LG_END, -1, draggable->fill_or_stroke, write_repr); + + this->updateMidstopDependencies (draggable, write_repr); + } + break; + case POINT_LG_END: + { + // the begin point is dependent only when dragging with ctrl+shift + this->moveOtherToDraggable (draggable->item, POINT_LG_BEGIN, 0, draggable->fill_or_stroke, write_repr); + + this->updateMidstopDependencies (draggable, write_repr); + } + break; + case POINT_LG_MID: + // no other nodes depend on mid points. + break; + case POINT_RG_R2: + this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr); + this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr); + this->updateMidstopDependencies (draggable, write_repr); + break; + case POINT_RG_R1: + this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr); + this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr); + this->updateMidstopDependencies (draggable, write_repr); + break; + case POINT_RG_CENTER: + this->moveOtherToDraggable (draggable->item, POINT_RG_R1, -1, draggable->fill_or_stroke, write_repr); + this->moveOtherToDraggable (draggable->item, POINT_RG_R2, -1, draggable->fill_or_stroke, write_repr); + this->moveOtherToDraggable (draggable->item, POINT_RG_FOCUS, -1, draggable->fill_or_stroke, write_repr); + this->updateMidstopDependencies (draggable, write_repr); + break; + case POINT_RG_FOCUS: + // nothing can depend on that + break; + case POINT_RG_MID1: + this->moveOtherToDraggable (draggable->item, POINT_RG_MID2, draggable->point_i, draggable->fill_or_stroke, write_repr); + break; + case POINT_RG_MID2: + this->moveOtherToDraggable (draggable->item, POINT_RG_MID1, draggable->point_i, draggable->fill_or_stroke, write_repr); + break; + default: + break; + } + } +} + + + +GrDragger::GrDragger(GrDrag *parent, Geom::Point p, GrDraggable *draggable) + : point(p), + point_original(p) +{ + this->draggables.clear(); + + this->parent = parent; + + guint32 fill_color = GR_KNOT_COLOR_NORMAL; + if (draggable && draggable->point_type == POINT_MG_CORNER) { + fill_color = GR_KNOT_COLOR_MESHCORNER; + } + + // create the knot + this->knot = new SPKnot(parent->desktop, "", Inkscape::CANVAS_ITEM_CTRL_TYPE_SHAPER, "CanvasItemCtrl::GrDragger"); + this->knot->setFill(fill_color, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER); + this->knot->setStroke(0x0000007f, 0x0000007f, 0x0000007f, 0x0000007f); + this->updateControlSizesOverload(this->knot); + this->knot->updateCtrl(); + + // move knot to the given point + this->knot->setPosition(p, SP_KNOT_STATE_NORMAL); + this->knot->show(); + + // connect knot's signals + if ( (draggable) // it can be NULL if a node in unsnapped (eg. focus point unsnapped from center) + // luckily, midstops never snap to other nodes so are never unsnapped... + && ( (draggable->point_type == POINT_LG_MID) + || (draggable->point_type == POINT_RG_MID1) + || (draggable->point_type == POINT_RG_MID2) ) ) + { + this->_moved_connection = this->knot->moved_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_moved_midpoint_handler), this)); + } else { + this->_moved_connection = this->knot->moved_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_moved_handler), this)); + } + + this->_clicked_connection = + this->knot->click_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_clicked_handler), this)); + + this->_doubleclicked_connection = + this->knot->doubleclicked_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_doubleclicked_handler), this)); + + this->_mousedown_connection = + this->knot->mousedown_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_mousedown_handler), this)); + + this->_ungrabbed_connection = + this->knot->ungrabbed_signal.connect(sigc::bind(sigc::ptr_fun(gr_knot_ungrabbed_handler), this)); + + // add the initial draggable + if (draggable) { + this->addDraggable (draggable); + } + + updateKnotShape(); +} + +GrDragger::~GrDragger() +{ + // unselect if it was selected + // Hmm, this causes a race condition as it triggers a call to gradient_selection_changed which + // can be executed while a list of draggers is being deleted. It doesn't actually seem to be + // necessary. + //this->parent->setDeselected(this); + + // disconnect signals + this->_moved_connection.disconnect(); + this->_clicked_connection.disconnect(); + this->_doubleclicked_connection.disconnect(); + this->_mousedown_connection.disconnect(); + this->_ungrabbed_connection.disconnect(); + + /* unref should call destroy */ + knot_unref(this->knot); + + // delete all draggables + for (auto draggable : this->draggables) { + delete draggable; + } + this->draggables.clear(); +} + +/** + * Select the dragger which has the given draggable. + */ +GrDragger *GrDrag::getDraggerFor(GrDraggable *d) { + for (auto dragger : this->draggers) { + for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j ) { + if (d == *j) { + return dragger; + } + } + } + return nullptr; +} + +/** + * Select the dragger which has the given draggable. + */ +GrDragger *GrDrag::getDraggerFor(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke) +{ + for (auto dragger : this->draggers) { + for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j ) { + GrDraggable *da2 = *j; + if ( (da2->item == item) && + (da2->point_type == point_type) && + (point_i == -1 || da2->point_i == point_i) && // -1 means this does not matter + (da2->fill_or_stroke == fill_or_stroke)) { + return (dragger); + } + } + } + return nullptr; +} + + +void GrDragger::moveOtherToDraggable(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, bool write_repr) +{ + GrDragger *d = this->parent->getDraggerFor(item, point_type, point_i, fill_or_stroke); + if (d && d != this) { + d->moveThisToDraggable(item, point_type, point_i, fill_or_stroke, write_repr); + } +} + +/** + * Find mesh corner corresponding to given dragger. + */ +GrDragger* GrDragger::getMgCorner(){ + GrDraggable *draggable = (GrDraggable *) this->draggables[0]; + if (draggable) { + + // If corner, we already found it! + if (draggable->point_type == POINT_MG_CORNER) { + return this; + } + + // The mapping between handles and corners is complex... so find corner by bruit force. + SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke); + SPMeshGradient *mg = dynamic_cast<SPMeshGradient *>(gradient); + if (mg) { + std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes; + for (guint i = 0; i < nodes.size(); ++i) { + for (guint j = 0; j < nodes[i].size(); ++j) { + if (nodes[i][j]->set && nodes[i][j]->node_type == MG_NODE_TYPE_HANDLE) { + if (draggable->point_i == (gint)nodes[i][j]->draggable) { + + if (nodes.size() > i+1 && nodes[i+1].size() > j && nodes[i+1][j]->node_type == MG_NODE_TYPE_CORNER) { + return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i+1][j]->draggable, draggable->fill_or_stroke); + } + + if (j != 0 && nodes.size() > i && nodes[i].size() > j-1 && nodes[i][j-1]->node_type == MG_NODE_TYPE_CORNER) { + return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i][j-1]->draggable, draggable->fill_or_stroke); + } + + if (i != 0 && nodes.size() > i-1 && nodes[i-1].size() > j && nodes[i-1][j]->node_type == MG_NODE_TYPE_CORNER) { + return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i-1][j]->draggable, draggable->fill_or_stroke); + } + + if (nodes.size() > i && nodes[i].size() > j+1 && nodes[i][j+1]->node_type == MG_NODE_TYPE_CORNER) { + return this->parent->getDraggerFor(draggable->item, POINT_MG_CORNER, nodes[i][j+1]->draggable, draggable->fill_or_stroke); + } + } + } + } + } + } + } + return nullptr; +} + +/** + * Highlight mesh node + */ +void GrDragger::highlightNode(SPMeshNode *node, bool highlight, Geom::Point corner_pos, int index) +{ + GrPointType type = POINT_MG_TENSOR; + if (node->node_type == MG_NODE_TYPE_HANDLE) { + type = POINT_MG_HANDLE; + } + + GrDraggable *draggable = (GrDraggable *) this->draggables[0]; + GrDragger *d = this->parent->getDraggerFor(draggable->item, type, node->draggable, draggable->fill_or_stroke); + if (d && node->draggable < G_MAXUINT) { + Geom::Point end = d->knot->pos; + Geom::Ray ray = Geom::Ray(corner_pos, end); + if (d->knot->desktop->is_yaxisdown()) { + end *= Geom::Scale(1, -1); + corner_pos *= Geom::Scale(1, -1); + ray.setPoints(corner_pos, end); + } + double angl = ray.angle(); + + if (highlight && knot->fill[SP_KNOT_VISIBLE] == GR_KNOT_COLOR_HIGHLIGHT && abs(angl - knot->angle) > Geom::rad_from_deg(10.0)){ + return; + } + + SPKnot *knot = d->knot; + if (highlight) { + knot->setFill(GR_KNOT_COLOR_HIGHLIGHT, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER); + } else { + knot->setFill(GR_KNOT_COLOR_NORMAL, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER, GR_KNOT_COLOR_MOUSEOVER); + } + + if (type == POINT_MG_HANDLE) { + if (highlight) { + knot->setShape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_TRIANGLE); + } else { + knot->setShape(Inkscape::CANVAS_ITEM_CTRL_SHAPE_CIRCLE); + } + } else { + //Code for tensors + return; + } + + this->updateControlSizesOverload(knot); + knot->setAngle(angl); + knot->updateCtrl(); + d->updateKnotShape(); + } +} + +/** + * Highlight handles for mesh corner corresponding to this dragger. + */ +void GrDragger::highlightCorner(bool highlight) +{ + // Must be a mesh gradient + GrDraggable *draggable = (GrDraggable *) this->draggables[0]; + if (draggable && draggable->point_type == POINT_MG_CORNER) { + SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke); + if (SP_IS_MESHGRADIENT( gradient )) { + Geom::Point corner_point = this->point; + gint corner = draggable->point_i; + SPMeshGradient *mg = SP_MESHGRADIENT( gradient ); + SPMeshNodeArray mg_arr = mg->array; + std::vector< std::vector< SPMeshNode* > > nodes = mg_arr.nodes; + // Find number of patch rows and columns + guint mrow = mg_arr.patch_rows(); + guint mcol = mg_arr.patch_columns(); + // Number of corners in a row of patches. + guint ncorners = mcol + 1; + // Find corner row/column + guint crow = corner / ncorners; + guint ccol = corner % ncorners; + // Find node row/column + guint nrow = crow * 3; + guint ncol = ccol * 3; + + bool patch[4]; + patch[0] = patch[1] = patch[2] = patch[3] = false; + if (ccol > 0 && crow > 0 ) patch[0] = true; + if (ccol < mcol && crow > 0 ) patch[1] = true; + if (ccol < mcol && crow < mrow ) patch[2] = true; + if (ccol > 0 && crow < mrow ) patch[3] = true; + if (patch[0] || patch[1]) { + highlightNode(nodes[nrow - 1][ncol], highlight, corner_point, 0); + } + if (patch[1] || patch[2]) { + highlightNode(nodes[nrow][ncol + 1], highlight, corner_point, 1); + } + if (patch[2] || patch[3]) { + highlightNode(nodes[nrow + 1][ncol], highlight, corner_point, 2); + } + if (patch[3] || patch[0]) { + highlightNode(nodes[nrow][ncol - 1], highlight, corner_point, 3); + } + // Highlight tensors + /* + if( patch[0] ) highlightNode(nodes[nrow-1][ncol-1], highlight, corner_point, point_i); + if( patch[1] ) highlightNode(nodes[nrow-1][ncol+1], highlight, corner_point, point_i); + if( patch[2] ) highlightNode(nodes[nrow+1][ncol+1], highlight, corner_point, point_i); + if( patch[3] ) highlightNode(nodes[nrow+1][ncol-1], highlight, corner_point, point_i); + */ + } + } +} + +/** + * Draw this dragger as selected. + */ +void GrDragger::select() +{ + this->knot->fill [SP_KNOT_STATE_NORMAL] = GR_KNOT_COLOR_SELECTED; + this->knot->ctrl->set_fill(GR_KNOT_COLOR_SELECTED); + highlightCorner(true); +} + +/** + * Draw this dragger as normal (deselected). + */ +void GrDragger::deselect() +{ + guint32 fill_color = isA(POINT_MG_CORNER) ? GR_KNOT_COLOR_MESHCORNER : GR_KNOT_COLOR_NORMAL; + this->knot->fill [SP_KNOT_STATE_NORMAL] = fill_color; + this->knot->ctrl->set_fill(fill_color); + highlightCorner(false); +} + +bool +GrDragger::isSelected() +{ + return parent->selected.find(this) != parent->selected.end(); +} + +/** + * Deselect all stops/draggers (private). + */ +void GrDrag::deselect_all() +{ + for (auto it : selected) + it->deselect(); + selected.clear(); +} + +/** + * Deselect all stops/draggers (public; emits signal). + */ +void GrDrag::deselectAll() +{ + deselect_all(); + desktop->emit_gradient_stop_selected(this, nullptr); +} + +/** + * Select all stops/draggers. + */ +void GrDrag::selectAll() +{ + for (auto d : this->draggers) { + setSelected (d, true, true); + } +} + +/** + * Select all stops/draggers that match the coords. + */ +void GrDrag::selectByCoords(std::vector<Geom::Point> coords) +{ + for (auto d : this->draggers) { + for (auto coord : coords) { + if (Geom::L2 (d->point - coord) < 1e-4) { + setSelected (d, true, true); + } + } + } +} + +/** + * Select draggers by stop + */ +void GrDrag::selectByStop(SPStop *stop, bool add_to_selection, bool override ) +{ + for (auto dragger : this->draggers) { + + for (std::vector<GrDraggable *>::const_iterator j = dragger->draggables.begin(); j != dragger->draggables.end(); ++j) { + + GrDraggable *d = *j; + SPGradient *gradient = getGradient(d->item, d->fill_or_stroke); + SPGradient *vector = gradient->getVector(false); + SPStop *stop_i = sp_get_stop_i(vector, d->point_i); + + if (stop_i == stop) { + setSelected(dragger, add_to_selection, override); + } + } + } +} +/** + * Select all stops/draggers that fall within the rect. + */ +void GrDrag::selectRect(Geom::Rect const &r) +{ + for (auto d : this->draggers) { + if (r.contains(d->point)) { + setSelected (d, true, true); + } + } +} + +/** + * Select a dragger. + * @param dragger The dragger to select. + * @param add_to_selection If true, add to selection, otherwise deselect others. + * @param override If true, always select this node, otherwise toggle selected status. +*/ +void GrDrag::setSelected(GrDragger *dragger, bool add_to_selection, bool override) +{ + GrDragger *seldragger = nullptr; + + // Don't allow selecting a mesh handle or mesh tensor. + // We might want to rethink since a dragger can have draggables of different types. + if ( dragger->isA( POINT_MG_HANDLE ) || dragger->isA( POINT_MG_TENSOR ) ) return; + + if (add_to_selection) { + if (!dragger) return; + if (override) { + selected.insert(dragger); + dragger->select(); + seldragger = dragger; + } else { // toggle + if(selected.find(dragger)!=selected.end()) { + selected.erase(dragger); + dragger->deselect(); + if (!selected.empty()) { + seldragger = *(selected.begin()); // select the dragger that is first in the list + } + } else { + selected.insert(dragger); + dragger->select(); + seldragger = dragger; + } + } + } else { + deselect_all(); + if (dragger) { + selected.insert(dragger); + dragger->select(); + seldragger = dragger; + } + } + if (seldragger) { + desktop->emit_gradient_stop_selected(this, nullptr); + } +} + +/** + * Deselect a dragger. + * @param dragger The dragger to deselect. + */ +void GrDrag::setDeselected(GrDragger *dragger) +{ + if (selected.find(dragger) != selected.end()) { + selected.erase(dragger); + dragger->deselect(); + } + desktop->emit_gradient_stop_selected(this, nullptr); +} + + +/** + * Create a line from p1 to p2 and add it to the curves list. Used for linear and radial gradients. + */ +void GrDrag::addLine(SPItem *item, Geom::Point p1, Geom::Point p2, Inkscape::PaintTarget fill_or_stroke) +{ + auto canvas_item_color = (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_PRIMARY : Inkscape::CANVAS_ITEM_SECONDARY; + auto item_curve = new Inkscape::CanvasItemCurve(desktop->getCanvasControls(), p1, p2); + item_curve->set_name("GradientLine"); + item_curve->set_stroke(canvas_item_color); + item_curve->set_is_fill(fill_or_stroke == Inkscape::FOR_FILL); + item_curve->set_item(item); + item_curves.push_back(item_curve); +} + + + +/** + * Create a curve from p0 to p3 and add it to the curves list. Used for mesh sides. + */ +void GrDrag::addCurve(SPItem *item, Geom::Point p0, Geom::Point p1, Geom::Point p2, Geom::Point p3, + int corner0, int corner1, int handle0, int handle1, Inkscape::PaintTarget fill_or_stroke) + +{ + // Highlight curve if one of its draggers has a mouse over it. + bool highlight = false; + GrDragger* dragger0 = getDraggerFor(item, POINT_MG_CORNER, corner0, fill_or_stroke); + GrDragger* dragger1 = getDraggerFor(item, POINT_MG_CORNER, corner1, fill_or_stroke); + GrDragger* dragger2 = getDraggerFor(item, POINT_MG_HANDLE, handle0, fill_or_stroke); + GrDragger* dragger3 = getDraggerFor(item, POINT_MG_HANDLE, handle1, fill_or_stroke); + if ((dragger0->knot && (dragger0->knot->flags & SP_KNOT_MOUSEOVER)) || + (dragger1->knot && (dragger1->knot->flags & SP_KNOT_MOUSEOVER)) || + (dragger2->knot && (dragger2->knot->flags & SP_KNOT_MOUSEOVER)) || + (dragger3->knot && (dragger3->knot->flags & SP_KNOT_MOUSEOVER)) ) { + highlight = true; + } + + auto canvas_item_color = + (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_PRIMARY : Inkscape::CANVAS_ITEM_SECONDARY; + if (highlight) { + canvas_item_color = + (fill_or_stroke == Inkscape::FOR_FILL) ? Inkscape::CANVAS_ITEM_SECONDARY : Inkscape::CANVAS_ITEM_PRIMARY; + } + + auto item_curve = new Inkscape::CanvasItemCurve(desktop->getCanvasControls(), p0, p1, p2, p3); + item_curve->set_name("GradientCurve"); + item_curve->set_stroke(canvas_item_color); + item_curve->set_is_fill(fill_or_stroke == Inkscape::FOR_FILL); + item_curve->set_item(item); + item_curve->set_corner0(corner0); + item_curve->set_corner1(corner1); + item_curves.push_back(item_curve); +} + + +/** + * If there already exists a dragger within MERGE_DIST of p, add the draggable to it; otherwise create + * new dragger and add it to draggers list. + */ +GrDragger* GrDrag::addDragger(GrDraggable *draggable) +{ + Geom::Point p = getGradientCoords(draggable->item, draggable->point_type, draggable->point_i, draggable->fill_or_stroke); + + for (auto dragger : this->draggers) { + if (dragger->mayMerge (draggable) && Geom::L2 (dragger->point - p) < MERGE_DIST) { + // distance is small, merge this draggable into dragger, no need to create new dragger + dragger->addDraggable (draggable); + dragger->updateKnotShape(); + return dragger; + } + } + + GrDragger *new_dragger = new GrDragger(this, p, draggable); + // fixme: draggers should be added AFTER the last one: this way tabbing through them will be from begin to end. + this->draggers.push_back(new_dragger); + return new_dragger; +} + +/** + * Add draggers for the radial gradient rg on item. + */ +void GrDrag::addDraggersRadial(SPRadialGradient *rg, SPItem *item, Inkscape::PaintTarget fill_or_stroke) +{ + rg->ensureVector(); + addDragger (new GrDraggable (item, POINT_RG_CENTER, 0, fill_or_stroke)); + guint num = rg->vector.stops.size(); + if (num > 2) { + for ( guint i = 1; i < num - 1; i++ ) { + addDragger (new GrDraggable (item, POINT_RG_MID1, i, fill_or_stroke)); + } + } + addDragger (new GrDraggable (item, POINT_RG_R1, num-1, fill_or_stroke)); + if (num > 2) { + for ( guint i = 1; i < num - 1; i++ ) { + addDragger (new GrDraggable (item, POINT_RG_MID2, i, fill_or_stroke)); + } + } + addDragger (new GrDraggable (item, POINT_RG_R2, num - 1, fill_or_stroke)); + addDragger (new GrDraggable (item, POINT_RG_FOCUS, 0, fill_or_stroke)); +} + +/** + * Add draggers for the linear gradient lg on item. + */ +void GrDrag::addDraggersLinear(SPLinearGradient *lg, SPItem *item, Inkscape::PaintTarget fill_or_stroke) +{ + lg->ensureVector(); + addDragger(new GrDraggable (item, POINT_LG_BEGIN, 0, fill_or_stroke)); + guint num = lg->vector.stops.size(); + if (num > 2) { + for ( guint i = 1; i < num - 1; i++ ) { + addDragger(new GrDraggable (item, POINT_LG_MID, i, fill_or_stroke)); + } + } + addDragger(new GrDraggable (item, POINT_LG_END, num - 1, fill_or_stroke)); +} + +/** + *Add draggers for the mesh gradient mg on item + */ +void GrDrag::addDraggersMesh(SPMeshGradient *mg, SPItem *item, Inkscape::PaintTarget fill_or_stroke) +{ + mg->ensureArray(); + std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes; + + // Show/hide mesh on fill/stroke. This doesn't work at the moment... and prevents node color updating. + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool show_handles = (prefs->getBool("/tools/mesh/show_handles", true)); + bool edit_fill = (prefs->getBool("/tools/mesh/edit_fill", true)); + bool edit_stroke = (prefs->getBool("/tools/mesh/edit_stroke", true)); + + // Make sure we have at least one patch defined. + if( mg->array.patch_rows() == 0 || mg->array.patch_columns() == 0 ) { + + std::cerr << "Empty Mesh, No Draggers to Add" << std::endl; + return; + } + + guint icorner = 0; + guint ihandle = 0; + guint itensor = 0; + mg->array.corners.clear(); + mg->array.handles.clear(); + mg->array.tensors.clear(); + + if( (fill_or_stroke == Inkscape::FOR_FILL && !edit_fill) || + (fill_or_stroke == Inkscape::FOR_STROKE && !edit_stroke) ) { + return; + } + + for(auto & node : nodes) { + for(auto & j : node) { + + // std::cout << " Draggers: " << i << " " << j << " " << nodes[i][j]->node_type << std::endl; + switch ( j->node_type ) { + + case MG_NODE_TYPE_CORNER: + { + mg->array.corners.push_back( j ); + GrDraggable *corner = new GrDraggable (item, POINT_MG_CORNER, icorner, fill_or_stroke); + addDragger ( corner ); + j->draggable = icorner; + ++icorner; + break; + } + + case MG_NODE_TYPE_HANDLE: + { + mg->array.handles.push_back( j ); + GrDraggable *handle = new GrDraggable (item, POINT_MG_HANDLE, ihandle, fill_or_stroke); + GrDragger* dragger = addDragger ( handle ); + + if( !show_handles || !j->set ) { + dragger->knot->hide(); + } + j->draggable = ihandle; + ++ihandle; + break; + } + + case MG_NODE_TYPE_TENSOR: + { + mg->array.tensors.push_back( j ); + GrDraggable *tensor = new GrDraggable (item, POINT_MG_TENSOR, itensor, fill_or_stroke); + GrDragger* dragger = addDragger ( tensor ); + if( !show_handles || !j->set ) { + dragger->knot->hide(); + } + j->draggable = itensor; + ++itensor; + break; + } + + default: + std::cerr << "Bad Mesh draggable type" << std::endl; + break; + } + } + } + + mg->array.draggers_valid = true; +} + +/** + * Refresh draggers, moving and toggling visibility as necessary. + * Does not regenerate draggers (as does updateDraggersMesh()). + */ +void GrDrag::refreshDraggersMesh(SPMeshGradient *mg, SPItem *item, Inkscape::PaintTarget fill_or_stroke) +{ + mg->ensureArray(); + std::vector< std::vector< SPMeshNode* > > nodes = mg->array.nodes; + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool show_handles = (prefs->getBool("/tools/mesh/show_handles", true)); + + // Make sure we have at least one patch defined. + if( mg->array.patch_rows() == 0 || mg->array.patch_columns() == 0 ) { + + std::cerr << "GrDrag::refreshDraggersMesh: Empty Mesh, No Draggers to refresh!" << std::endl; + return; + } + + guint ihandle = 0; + guint itensor = 0; + + for(auto & node : nodes) { + for(auto & j : node) { + + // std::cout << " Draggers: " << i << " " << j << " " << nodes[i][j]->node_type << std::endl; + + switch ( j->node_type ) { + + case MG_NODE_TYPE_CORNER: + // Do nothing, corners are always shown. + break; + + case MG_NODE_TYPE_HANDLE: + { + GrDragger* dragger = getDraggerFor(item, POINT_MG_HANDLE, ihandle, fill_or_stroke); + if (dragger) { + Geom::Point pk = getGradientCoords( item, POINT_MG_HANDLE, ihandle, fill_or_stroke); + dragger->knot->moveto(pk); + if( !show_handles || !j->set ) { + dragger->knot->hide(); + } else { + dragger->knot->show(); + } + } else { + // This can happen if a draggable is not visible. + // std::cerr << "GrDrag::refreshDraggersMesh: No dragger!" << std::endl; + } + ++ihandle; + break; + } + + case MG_NODE_TYPE_TENSOR: + { + GrDragger* dragger = getDraggerFor(item, POINT_MG_TENSOR, itensor, fill_or_stroke); + if (dragger) { + Geom::Point pk = getGradientCoords( item, POINT_MG_TENSOR, itensor, fill_or_stroke); + dragger->knot->moveto(pk); + if( !show_handles || !j->set ) { + dragger->knot->hide(); + } else { + dragger->knot->show(); + } + } else { + // This can happen if a draggable is not visible. + // std::cerr << "GrDrag::refreshDraggersMesh: No dragger!" << std::endl; + } + ++itensor; + break; + } + + default: + std::cerr << "Bad Mesh draggable type" << std::endl; + break; + } + } + } +} + +/** + * Artificially grab the knot of this dragger; used by the gradient context. + * Not used at the moment. + */ +void GrDrag::grabKnot(GrDragger *dragger, gint x, gint y, guint32 etime) +{ + if (dragger) { + dragger->knot->startDragging(dragger->point, x, y, etime); + } +} + +/** + * Artificially grab the knot of the dragger with this draggable; used by the gradient context. + * This allows setting the final point from the end of the drag when creating a new gradient. + */ +void GrDrag::grabKnot(SPItem *item, GrPointType point_type, gint point_i, Inkscape::PaintTarget fill_or_stroke, gint x, gint y, guint32 etime) +{ + GrDragger *dragger = getDraggerFor(item, point_type, point_i, fill_or_stroke); + if (dragger) { + dragger->knot->startDragging(dragger->point, x, y, etime); + } +} + +/** + * Regenerates the draggers list from the current selection; is called when selection is changed or + * modified, also when a radial dragger needs to update positions of other draggers in the gradient. + */ +void GrDrag::updateDraggers() +{ + selected.clear(); + // delete old draggers + for (auto dragger : this->draggers) { + delete dragger; + } + this->draggers.clear(); + + g_return_if_fail(this->selection != nullptr); + auto list = this->selection->items(); + for (auto i = list.begin(); i != list.end(); ++i) { + SPItem *item = *i; + SPStyle *style = item->style; + + if (style && (style->fill.isPaintserver())) { + SPPaintServer *server = style->getFillPaintServer(); + if (auto gradient = dynamic_cast<SPGradient *>(server)) { + if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) { + // Suppress "gradientness" of solid paint + } else if (SP_IS_LINEARGRADIENT(server)) { + addDraggersLinear( SP_LINEARGRADIENT(server), item, Inkscape::FOR_FILL ); + } else if (SP_IS_RADIALGRADIENT(server)) { + addDraggersRadial( SP_RADIALGRADIENT(server), item, Inkscape::FOR_FILL ); + } else if (SP_IS_MESHGRADIENT(server)) { + addDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_FILL ); + } + } + } + + if (style && (style->stroke.isPaintserver())) { + SPPaintServer *server = style->getStrokePaintServer(); + if (auto gradient = dynamic_cast<SPGradient *>(server)) { + if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) { + // Suppress "gradientness" of solid paint + } else if (SP_IS_LINEARGRADIENT(server)) { + addDraggersLinear( SP_LINEARGRADIENT(server), item, Inkscape::FOR_STROKE ); + } else if (SP_IS_RADIALGRADIENT(server)) { + addDraggersRadial( SP_RADIALGRADIENT(server), item, Inkscape::FOR_STROKE ); + } else if (SP_IS_MESHGRADIENT(server)) { + addDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_STROKE ); + } + } + } + } +} + + +/** + * Refresh draggers, moving and toggling visibility as necessary. + * Does not regenerate draggers (as does updateDraggers()). + * Only applies to mesh gradients. + */ +void GrDrag::refreshDraggers() +{ + + g_return_if_fail(this->selection != nullptr); + auto list = this->selection->items(); + for (auto i = list.begin(); i != list.end(); ++i) { + SPItem *item = *i; + SPStyle *style = item->style; + + if (style && (style->fill.isPaintserver())) { + SPPaintServer *server = style->getFillPaintServer(); + if ( server && SP_IS_GRADIENT( server ) ) { + if ( SP_IS_MESHGRADIENT(server) ) { + refreshDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_FILL ); + } + } + } + + if (style && (style->stroke.isPaintserver())) { + SPPaintServer *server = style->getStrokePaintServer(); + if ( server && SP_IS_GRADIENT( server ) ) { + if ( SP_IS_MESHGRADIENT(server) ) { + refreshDraggersMesh( SP_MESHGRADIENT(server), item, Inkscape::FOR_STROKE ); + } + } + } + } +} + + +/** + * Returns true if at least one of the draggers' knots has the mouse hovering above it. + */ +bool GrDrag::mouseOver() +{ + static bool mouse_out = false; + // added knot mouse out for future use + for (auto d : this->draggers) { + if (d->knot && (d->knot->flags & SP_KNOT_MOUSEOVER)) { + mouse_out = true; + updateLines(); + return true; + } + } + if(mouse_out == true){ + updateLines(); + mouse_out = false; + } + return false; +} + +/** + * Regenerates the lines list from the current selection; is called on each move of a dragger, so that + * lines are always in sync with the actual gradient. + */ +void GrDrag::updateLines() +{ + for (auto curve : item_curves) { + delete curve; + } + item_curves.clear(); + + g_return_if_fail(this->selection != nullptr); + + auto list = this->selection->items(); + for (auto i = list.begin(); i != list.end(); ++i) { + SPItem *item = *i; + + SPStyle *style = item->style; + + if (style && (style->fill.isPaintserver())) { + SPPaintServer *server = item->style->getFillPaintServer(); + if (auto gradient = dynamic_cast<SPGradient *>(server)) { + if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) { + // Suppress "gradientness" of solid paint + } else if (SP_IS_LINEARGRADIENT(server)) { + addLine(item, getGradientCoords(item, POINT_LG_BEGIN, 0, Inkscape::FOR_FILL), getGradientCoords(item, POINT_LG_END, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL); + } else if (SP_IS_RADIALGRADIENT(server)) { + Geom::Point center = getGradientCoords(item, POINT_RG_CENTER, 0, Inkscape::FOR_FILL); + addLine(item, center, getGradientCoords(item, POINT_RG_R1, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL); + addLine(item, center, getGradientCoords(item, POINT_RG_R2, 0, Inkscape::FOR_FILL), Inkscape::FOR_FILL); + } else if (SP_IS_MESHGRADIENT(server)) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool edit_fill = (prefs->getBool("/tools/mesh/edit_fill", true)); + + SPMeshGradient *mg = SP_MESHGRADIENT(server); + + if (edit_fill) { + guint rows = mg->array.patch_rows(); + guint columns = mg->array.patch_columns(); + for ( guint i = 0; i < rows; ++i ) { + for ( guint j = 0; j < columns; ++j ) { + + std::vector<Geom::Point> h; + + SPMeshPatchI patch( &(mg->array.nodes), i, j ); + + // clockwise around patch, used to find corner dragger + int corner0 = i * (columns + 1) + j; + int corner1 = corner0 + 1; + int corner2 = corner1 + columns + 1; + int corner3 = corner2 - 1; + // clockwise around patch, used to find handle dragger + int handle0 = 2*j + i*(2+4*columns); + int handle1 = handle0 + 1; + int handle2 = j + i*(2+4*columns) + 2*columns + 1; + int handle3 = j + i*(2+4*columns) + 3*columns + 2; + int handle4 = handle1 + (2+4*columns); + int handle5 = handle0 + (2+4*columns); + int handle6 = handle3 - 1; + int handle7 = handle2 - 1; + + // Top line + h = patch.getPointsForSide( 0 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner0, corner1, handle0, handle1, Inkscape::FOR_FILL ); + + // Right line + if( j == columns - 1 ) { + h = patch.getPointsForSide( 1 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner1, corner2, handle2, handle3, Inkscape::FOR_FILL ); + } + + // Bottom line + if( i == rows - 1 ) { + h = patch.getPointsForSide( 2 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner2, corner3, handle4, handle5, Inkscape::FOR_FILL ); + } + + // Left line + h = patch.getPointsForSide( 3 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner3, corner0, handle6, handle7, Inkscape::FOR_FILL ); + } + } + } + } + } + } + + if (style && (style->stroke.isPaintserver())) { + SPPaintServer *server = item->style->getStrokePaintServer(); + if (auto gradient = dynamic_cast<SPGradient *>(server)) { + if (gradient->isSolid() || (gradient->getVector() && gradient->getVector()->isSolid())) { + // Suppress "gradientness" of solid paint + } else if (SP_IS_LINEARGRADIENT(server)) { + addLine(item, getGradientCoords(item, POINT_LG_BEGIN, 0, Inkscape::FOR_STROKE), getGradientCoords(item, POINT_LG_END, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE); + } else if (SP_IS_RADIALGRADIENT(server)) { + Geom::Point center = getGradientCoords(item, POINT_RG_CENTER, 0, Inkscape::FOR_STROKE); + addLine(item, center, getGradientCoords(item, POINT_RG_R1, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE); + addLine(item, center, getGradientCoords(item, POINT_RG_R2, 0, Inkscape::FOR_STROKE), Inkscape::FOR_STROKE); + } else if (SP_IS_MESHGRADIENT(server)) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool edit_stroke = (prefs->getBool("/tools/mesh/edit_stroke", true)); + + if (edit_stroke) { + + // MESH FIXME: TURN ROUTINE INTO FUNCTION AND CALL FOR BOTH FILL AND STROKE. + SPMeshGradient *mg = SP_MESHGRADIENT(server); + + guint rows = mg->array.patch_rows(); + guint columns = mg->array.patch_columns(); + for ( guint i = 0; i < rows; ++i ) { + for ( guint j = 0; j < columns; ++j ) { + + std::vector<Geom::Point> h; + + SPMeshPatchI patch( &(mg->array.nodes), i, j ); + + // clockwise around patch, used to find corner dragger + int corner0 = i * (columns + 1) + j; + int corner1 = corner0 + 1; + int corner2 = corner1 + columns + 1; + int corner3 = corner2 - 1; + // clockwise around patch, used to find handle dragger + int handle0 = 2*j + i*(2+4*columns); + int handle1 = handle0 + 1; + int handle2 = j + i*(2+4*columns) + 2*columns + 1; + int handle3 = j + i*(2+4*columns) + 3*columns + 2; + int handle4 = handle1 + (2+4*columns); + int handle5 = handle0 + (2+4*columns); + int handle6 = handle3 - 1; + int handle7 = handle2 - 1; + + // Top line + h = patch.getPointsForSide( 0 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner0, corner1, handle0, handle1, Inkscape::FOR_STROKE); + + // Right line + if( j == columns - 1 ) { + h = patch.getPointsForSide( 1 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner1, corner2, handle2, handle3, Inkscape::FOR_STROKE); + } + + // Bottom line + if( i == rows - 1 ) { + h = patch.getPointsForSide( 2 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner2, corner3, handle4, handle5, Inkscape::FOR_STROKE); + } + + // Left line + h = patch.getPointsForSide( 3 ); + for( guint p = 0; p < 4; ++p ) { + h[p] *= Geom::Affine(mg->gradientTransform) * (Geom::Affine)item->i2dt_affine(); + } + addCurve (item, h[0], h[1], h[2], h[3], corner3, corner0, handle6, handle7,Inkscape::FOR_STROKE); + } + } + } + } + } + } + } +} + +/** + * Regenerates the levels list from the current selection. + * Levels correspond to bounding box edges and midpoints. + */ +void GrDrag::updateLevels() +{ + hor_levels.clear(); + vert_levels.clear(); + + g_return_if_fail (this->selection != nullptr); + + auto list = this->selection->items(); + for (auto i = list.begin(); i != list.end(); ++i) { + SPItem *item = *i; + Geom::OptRect rect = item->desktopVisualBounds(); + if (rect) { + // Remember the edges of the bbox and the center axis + hor_levels.push_back(rect->min()[Geom::Y]); + hor_levels.push_back(rect->max()[Geom::Y]); + hor_levels.push_back(rect->midpoint()[Geom::Y]); + vert_levels.push_back(rect->min()[Geom::X]); + vert_levels.push_back(rect->max()[Geom::X]); + vert_levels.push_back(rect->midpoint()[Geom::X]); + } + } +} + +void GrDrag::selected_reverse_vector() +{ + if (selected.empty()) + return; + + for(auto draggable : (*(selected.begin()))->draggables) { + sp_item_gradient_reverse_vector (draggable->item, draggable->fill_or_stroke); + } +} + +void GrDrag::selected_move_nowrite(double x, double y, bool scale_radial) +{ + selected_move (x, y, false, scale_radial); +} + +void GrDrag::selected_move(double x, double y, bool write_repr, bool scale_radial) +{ + if (selected.empty()) + return; + + bool did = false; + + for(auto d : selected) { + if (!d->isA(POINT_LG_MID) && !d->isA(POINT_RG_MID1) && !d->isA(POINT_RG_MID2)) { + // if this is an endpoint, + + // Moving an rg center moves its focus and radii as well. + // therefore, if this is a focus or radius and if selection + // contains the center as well, do not move this one + if (d->isA(POINT_RG_R1) || d->isA(POINT_RG_R2) || + (d->isA(POINT_RG_FOCUS) && !d->isA(POINT_RG_CENTER))) { + bool skip_radius_with_center = false; + for(auto d_new : selected) { + if (d_new->isA (( d->draggables[0])->item, + POINT_RG_CENTER, + 0, + (d->draggables[0])->fill_or_stroke)) { + // FIXME: here we take into account only the first draggable! + skip_radius_with_center = true; + } + } + if (skip_radius_with_center) + continue; + } + + did = true; + Geom::Point p_old = d->point; + d->point += Geom::Point (x, y); + d->point_original = d->point; + d->knot->moveto(d->point); + + d->fireDraggables (write_repr, scale_radial); + d->moveMeshHandles( p_old, MG_NODE_NO_SCALE ); + d->updateDependencies(write_repr); + } + } + + if (write_repr && did) { + // we did an undoable action + DocumentUndo::maybeDone(desktop->getDocument(), "grmoveh", _("Move gradient handle(s)"), INKSCAPE_ICON("color-gradient")); + return; + } + + if (!did) { // none of the end draggers are selected, so let's try to move the mids + + GrDragger *dragger = *(selected.begin()); + // a midpoint dragger can (logically) only contain one GrDraggable + GrDraggable *draggable = dragger->draggables[0]; + + Geom::Point begin(0,0), end(0,0); + Geom::Point low_lim(0,0), high_lim(0,0); + + SPObject *server = draggable->getServer(); + std::vector<GrDragger *> moving; + gr_midpoint_limits(dragger, server, &begin, &end, &low_lim, &high_lim, moving); + + Geom::LineSegment ls(low_lim, high_lim); + Geom::Point p = ls.pointAt(ls.nearestTime(dragger->point + Geom::Point(x,y))); + Geom::Point displacement = p - dragger->point; + + for(auto drg : moving) { + SPKnot *drgknot = drg->knot; + drg->point += displacement; + drgknot->moveto(drg->point); + drg->fireDraggables (true); + drg->updateDependencies(true); + did = true; + } + + if (write_repr && did) { + // we did an undoable action + DocumentUndo::maybeDone(desktop->getDocument(), "grmovem", _("Move gradient mid stop(s)"), INKSCAPE_ICON("color-gradient")); + } + } +} + +void GrDrag::selected_move_screen(double x, double y) +{ + gdouble zoom = desktop->current_zoom(); + gdouble zx = x / zoom; + gdouble zy = y / zoom; + + selected_move (zx, zy); +} + +/** + * Handle arrow key events + * @param event Event with type GDK_KEY_PRESS + * @return True if the event was handled, false otherwise + */ +bool GrDrag::key_press_handler(GdkEvent *event) +{ + if (MOD__CTRL(event)) { + return false; + } + + auto keyval = Inkscape::UI::Tools::get_latin_keyval(&event->key); + double x_dir = 0; + double y_dir = 0; + + switch (keyval) { + case GDK_KEY_Left: // move handle left + case GDK_KEY_KP_Left: + case GDK_KEY_KP_4: + x_dir = -1; + break; + + case GDK_KEY_Up: // move handle up + case GDK_KEY_KP_Up: + case GDK_KEY_KP_8: + y_dir = 1; + break; + + case GDK_KEY_Right: // move handle right + case GDK_KEY_KP_Right: + case GDK_KEY_KP_6: + x_dir = 1; + break; + + case GDK_KEY_Down: // move handle down + case GDK_KEY_KP_Down: + case GDK_KEY_KP_2: + y_dir = -1; + break; + + default: + return false; + } + + y_dir *= -desktop->yaxisdir(); + + gint mul = 1 + desktop->canvas->gobble_key_events(keyval, 0); // with any mask + + if (MOD__SHIFT(event)) { + mul *= 10; + } + + if (MOD__ALT(event)) { + selected_move_screen(mul * x_dir, mul * y_dir); + } else { + auto *prefs = Inkscape::Preferences::get(); + auto nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px + + mul *= nudge; + selected_move(mul * x_dir, mul * y_dir); + } + + return true; +} + +/** + * Select the knot next to the last selected one and deselect all other selected. + */ +GrDragger *GrDrag::select_next() +{ + GrDragger *d = nullptr; + if (selected.empty() || (++find(draggers.begin(),draggers.end(),*(selected.begin())))==draggers.end()) { + if (!draggers.empty()) + d = draggers[0]; + } else { + d = *(++find(draggers.begin(),draggers.end(),*(selected.begin()))); + } + if (d) + setSelected (d); + return d; +} + +/** + * Select the knot previous from the last selected one and deselect all other selected. + */ +GrDragger *GrDrag::select_prev() +{ + GrDragger *d = nullptr; + if (selected.empty() || draggers[0] == (*(selected.begin()))) { + if (!draggers.empty()) + d = draggers[draggers.size()-1]; + } else { + d = *(--find(draggers.begin(),draggers.end(),*(selected.begin()))); + } + if (d) + setSelected (d); + return d; +} + + +// FIXME: i.m.o. an ugly function that I just made to work, but... aargh! (Johan) +void GrDrag::deleteSelected(bool just_one) +{ + if (selected.empty()) return; + + SPDocument *document = nullptr; + + struct StructStopInfo { + SPStop * spstop; + GrDraggable * draggable; + SPGradient * gradient; + SPGradient * vector; + }; + + std::vector<SPStop *> midstoplist;// list of stops that must be deleted (will be deleted first) + std::vector<StructStopInfo *> endstoplist;// list of stops that must be deleted + + while (!selected.empty()) { + GrDragger *dragger = *(selected.begin()); + for(auto draggable : dragger->draggables) { + SPGradient *gradient = getGradient(draggable->item, draggable->fill_or_stroke); + SPGradient *vector = sp_gradient_get_forked_vector_if_necessary (gradient, false); + + switch (draggable->point_type) { + case POINT_LG_MID: + case POINT_RG_MID1: + case POINT_RG_MID2: + { + SPStop *stop = sp_get_stop_i(vector, draggable->point_i); + // check if already present in list. (e.g. when both RG_MID1 and RG_MID2 were selected) + bool present = false; + for (auto i:midstoplist) { + if ( i == stop ) { + present = true; + break; // no need to search further. + } + } + if (!present) + midstoplist.push_back(stop); + } + break; + case POINT_LG_BEGIN: + case POINT_LG_END: + case POINT_RG_CENTER: + case POINT_RG_R1: + case POINT_RG_R2: + { + SPStop *stop = nullptr; + if ( (draggable->point_type == POINT_LG_BEGIN) || (draggable->point_type == POINT_RG_CENTER) ) { + stop = vector->getFirstStop(); + } else { + stop = sp_last_stop(vector); + } + if (stop) { + StructStopInfo *stopinfo = new StructStopInfo; + stopinfo->spstop = stop; + stopinfo->draggable = draggable; + stopinfo->gradient = gradient; + stopinfo->vector = vector; + // check if already present in list. (e.g. when both R1 and R2 were selected) + bool present = false; + for (auto i : endstoplist) { + if ( i->spstop == stopinfo->spstop ) { + present = true; + break; // no need to search further. + } + } + if (!present) + endstoplist.push_back(stopinfo); + else + delete stopinfo; + } + } + break; + + default: + break; + } + } + selected.erase(dragger); + if ( just_one ) break; // iterate once if just_one is set. + } + for (auto stop:midstoplist) { + document = stop->document; + Inkscape::XML::Node * parent = stop->getRepr()->parent(); + parent->removeChild(stop->getRepr()); + } + + for (auto stopinfo:endstoplist) { + document = stopinfo->spstop->document; + + // 2 is the minimum, cannot delete more than that without deleting the whole vector + // cannot use vector->vector.stops.size() because the vector might be invalidated by deletion of a midstop + // manually count the children, don't know if there already exists a function for this... + int len = 0; + for (auto& child: stopinfo->vector->children) + { + if ( SP_IS_STOP(&child) ) { + len ++; + } + } + if (len > 2) + { + switch (stopinfo->draggable->point_type) { + case POINT_LG_BEGIN: + { + stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr()); + + SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient); + Geom::Point oldbegin = Geom::Point (lg->x1.computed, lg->y1.computed); + Geom::Point end = Geom::Point (lg->x2.computed, lg->y2.computed); + SPStop *stop = stopinfo->vector->getFirstStop(); + gdouble offset = stop->offset; + Geom::Point newbegin = oldbegin + offset * (end - oldbegin); + lg->x1.computed = newbegin[Geom::X]; + lg->y1.computed = newbegin[Geom::Y]; + + Inkscape::XML::Node *repr = stopinfo->gradient->getRepr(); + repr->setAttributeSvgDouble("x1", lg->x1.computed); + repr->setAttributeSvgDouble("y1", lg->y1.computed); + stop->offset = 0; + stop->getRepr()->setAttributeCssDouble("offset", 0); + + // iterate through midstops to set new offset values such that they won't move on canvas. + SPStop *laststop = sp_last_stop(stopinfo->vector); + stop = stop->getNextStop(); + while ( stop != laststop ) { + stop->offset = (stop->offset - offset)/(1 - offset); + stop->getRepr()->setAttributeCssDouble("offset", stop->offset); + stop = stop->getNextStop(); + } + } + break; + case POINT_LG_END: + { + stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr()); + + SPLinearGradient *lg = SP_LINEARGRADIENT(stopinfo->gradient); + Geom::Point begin = Geom::Point (lg->x1.computed, lg->y1.computed); + Geom::Point oldend = Geom::Point (lg->x2.computed, lg->y2.computed); + SPStop *laststop = sp_last_stop(stopinfo->vector); + gdouble offset = laststop->offset; + Geom::Point newend = begin + offset * (oldend - begin); + lg->x2.computed = newend[Geom::X]; + lg->y2.computed = newend[Geom::Y]; + + Inkscape::XML::Node *repr = stopinfo->gradient->getRepr(); + repr->setAttributeSvgDouble("x2", lg->x2.computed); + repr->setAttributeSvgDouble("y2", lg->y2.computed); + laststop->offset = 1; + laststop->getRepr()->setAttributeCssDouble("offset", 1); + + // iterate through midstops to set new offset values such that they won't move on canvas. + SPStop *stop = stopinfo->vector->getFirstStop(); + stop = stop->getNextStop(); + while ( stop != laststop ) { + stop->offset = stop->offset / offset; + stop->getRepr()->setAttributeCssDouble("offset", stop->offset); + stop = stop->getNextStop(); + } + } + break; + case POINT_RG_CENTER: + { + SPStop *newfirst = stopinfo->spstop->getNextStop(); + if (newfirst) { + newfirst->offset = 0; + newfirst->getRepr()->setAttributeCssDouble("offset", 0); + } + stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr()); + } + break; + case POINT_RG_R1: + case POINT_RG_R2: + { + stopinfo->vector->getRepr()->removeChild(stopinfo->spstop->getRepr()); + + SPRadialGradient *rg = SP_RADIALGRADIENT(stopinfo->gradient); + double oldradius = rg->r.computed; + SPStop *laststop = sp_last_stop(stopinfo->vector); + gdouble offset = laststop->offset; + double newradius = offset * oldradius; + rg->r.computed = newradius; + + Inkscape::XML::Node *repr = rg->getRepr(); + repr->setAttributeSvgDouble("r", rg->r.computed); + laststop->offset = 1; + laststop->getRepr()->setAttributeCssDouble("offset", 1); + + // iterate through midstops to set new offset values such that they won't move on canvas. + SPStop *stop = stopinfo->vector->getFirstStop(); + stop = stop->getNextStop(); + while ( stop != laststop ) { + stop->offset = stop->offset / offset; + stop->getRepr()->setAttributeCssDouble("offset", stop->offset); + stop = stop->getNextStop(); + } + } + break; + default: + break; + } + } + else + { // delete the gradient from the object. set fill to unset FIXME: set to fill of unselected node? + SPCSSAttr *css = sp_repr_css_attr_new (); + + // stopinfo->spstop is the selected stop + Inkscape::XML::Node *unselectedrepr = stopinfo->vector->getRepr()->firstChild(); + if (unselectedrepr == stopinfo->spstop->getRepr() ) { + unselectedrepr = unselectedrepr->next(); + } + + if (unselectedrepr == nullptr) { + if (stopinfo->draggable->fill_or_stroke == Inkscape::FOR_FILL) { + sp_repr_css_unset_property (css, "fill"); + } else { + sp_repr_css_unset_property (css, "stroke"); + } + } else { + SPCSSAttr *stopcss = sp_repr_css_attr(unselectedrepr, "style"); + if (stopinfo->draggable->fill_or_stroke == Inkscape::FOR_FILL) { + sp_repr_css_set_property(css, "fill", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset")); + sp_repr_css_set_property(css, "fill-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1")); + } else { + sp_repr_css_set_property(css, "stroke", sp_repr_css_property(stopcss, "stop-color", "inkscape:unset")); + sp_repr_css_set_property(css, "stroke-opacity", sp_repr_css_property(stopcss, "stop-opacity", "1")); + } + sp_repr_css_attr_unref (stopcss); + } + + sp_repr_css_change(stopinfo->draggable->item->getRepr(), css, "style"); + sp_repr_css_attr_unref (css); + } + + delete stopinfo; + } + + if (document) { + DocumentUndo::done( document, _("Delete gradient stop(s)"), INKSCAPE_ICON("color-gradient")); + } +} + + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 : |