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Diffstat (limited to 'src/ui/tools/pen-tool.cpp')
| -rw-r--r-- | src/ui/tools/pen-tool.cpp | 2043 |
1 files changed, 2043 insertions, 0 deletions
diff --git a/src/ui/tools/pen-tool.cpp b/src/ui/tools/pen-tool.cpp new file mode 100644 index 0000000..2c280c6 --- /dev/null +++ b/src/ui/tools/pen-tool.cpp @@ -0,0 +1,2043 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** \file + * Pen event context implementation. + */ + +/* + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * Jon A. Cruz <jon@joncruz.org> + * + * Copyright (C) 2000 Lauris Kaplinski + * Copyright (C) 2000-2001 Ximian, Inc. + * Copyright (C) 2002 Lauris Kaplinski + * Copyright (C) 2004 Monash University + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstring> +#include <string> + +#include <gdk/gdkkeysyms.h> +#include <glibmm/i18n.h> + +#include <2geom/curves.h> + +#include "context-fns.h" +#include "desktop.h" +#include "include/macros.h" +#include "inkscape-application.h" // Undo check +#include "message-context.h" +#include "message-stack.h" +#include "selection-chemistry.h" +#include "selection.h" + +#include "display/curve.h" +#include "display/control/canvas-item-bpath.h" +#include "display/control/canvas-item-ctrl.h" +#include "display/control/canvas-item-curve.h" + +#include "object/sp-path.h" + +#include "ui/draw-anchor.h" +#include "ui/shortcuts.h" +#include "ui/tools/pen-tool.h" + +// we include the necessary files for BSpline & Spiro +#include "live_effects/lpeobject.h" +#include "live_effects/lpeobject-reference.h" +#include "live_effects/parameter/path.h" + +#define INKSCAPE_LPE_SPIRO_C +#include "live_effects/lpe-spiro.h" + +#include "helper/geom-nodetype.h" + +// For handling un-continuous paths: +#include "inkscape.h" + +#include "live_effects/spiro.h" + +#define INKSCAPE_LPE_BSPLINE_C +#include "live_effects/lpe-bspline.h" + +// Given an optionally-present SPCurve, e.g. a smart/raw pointer or an optional, +// return a copy of its pathvector if present, or a blank pathvector otherwise. +template <typename T> +static Geom::PathVector copy_pathvector_optional(T &p) +{ + if (p) { + return p->get_pathvector(); + } else { + return {}; + } +} + +namespace Inkscape { +namespace UI { +namespace Tools { + +static Geom::Point pen_drag_origin_w(0, 0); +static bool pen_within_tolerance = false; + +PenTool::PenTool(SPDesktop *desktop, std::string prefs_path, const std::string &cursor_filename) + : FreehandBase(desktop, prefs_path, cursor_filename) + , _undo{"doc.undo"} + , _redo{"doc.redo"} +{ + tablet_enabled = false; + + // Pen indicators (temporary handles shown when adding a new node). + auto canvas = desktop->getCanvasControls(); + for (int i = 0; i < 4; i++) { + ctrl[i] = make_canvasitem<CanvasItemCtrl>(canvas, ctrl_types[i]); + ctrl[i]->set_fill(0x0); + ctrl[i]->hide(); + } + + cl0 = make_canvasitem<CanvasItemCurve>(canvas); + cl1 = make_canvasitem<CanvasItemCurve>(canvas); + cl0->hide(); + cl1->hide(); + + sp_event_context_read(this, "mode"); + + this->anchor_statusbar = false; + + this->setPolylineMode(); + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if (prefs->getBool("/tools/freehand/pen/selcue")) { + this->enableSelectionCue(); + } + + _desktop_destroy = _desktop->connectDestroy([=](SPDesktop *) { state = State::DEAD; }); +} + +PenTool::~PenTool() { + _desktop_destroy.disconnect(); + this->discard_delayed_snap_event(); + + if (this->npoints != 0) { + // switching context - finish path + this->ea = nullptr; // unset end anchor if set (otherwise crashes) + if (state != State::DEAD) { + _finish(false); + } + } + + for (auto &c : ctrl) { + c.reset(); + } + cl0.reset(); + cl1.reset(); + + if (this->waiting_item && this->expecting_clicks_for_LPE > 0) { + // we received too few clicks to sanely set the parameter path so we remove the LPE from the item + this->waiting_item->removeCurrentPathEffect(false); + } +} + +void PenTool::setPolylineMode() { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + guint mode = prefs->getInt("/tools/freehand/pen/freehand-mode", 0); + // change the nodes to make space for bspline mode + this->polylines_only = (mode == 3 || mode == 4); + this->polylines_paraxial = (mode == 4); + this->spiro = (mode == 1); + this->bspline = (mode == 2); + this->_bsplineSpiroColor(); + if (!this->green_bpaths.empty()) { + this->_redrawAll(); + } +} + + +void PenTool::_cancel() { + this->state = PenTool::STOP; + this->_resetColors(); + for (auto &c : ctrl) { + c->hide(); + } + cl0->hide(); + cl1->hide(); + this->message_context->clear(); + this->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled")); + _redo_stack.clear(); +} + +/** + * Callback that sets key to value in pen context. + */ +void PenTool::set(const Inkscape::Preferences::Entry& val) { + Glib::ustring name = val.getEntryName(); + + if (name == "mode") { + if ( val.getString() == "drag" ) { + this->mode = MODE_DRAG; + } else { + this->mode = MODE_CLICK; + } + } +} + +bool PenTool::hasWaitingLPE() { + // note: waiting_LPE_type is defined in SPDrawContext + return (this->waiting_LPE != nullptr || + this->waiting_LPE_type != Inkscape::LivePathEffect::INVALID_LPE); +} + +/** + * Snaps new node relative to the previous node. + */ +void PenTool::_endpointSnap(Geom::Point &p, guint const state) { + // Paraxial kicks in after first line has set the angle (before then it's a free line) + bool poly = this->polylines_paraxial && !this->green_curve->is_unset(); + + if ((state & GDK_CONTROL_MASK) && !poly) { //CTRL enables angular snapping + if (this->npoints > 0) { + spdc_endpoint_snap_rotation(this, p, this->p[0], state); + } else { + std::optional<Geom::Point> origin = std::optional<Geom::Point>(); + spdc_endpoint_snap_free(this, p, origin, state); + } + } else { + // We cannot use shift here to disable snapping because the shift-key is already used + // to toggle the paraxial direction; if the user wants to disable snapping (s)he will + // have to use the %-key, the menu, or the snap toolbar + if ((this->npoints > 0) && poly) { + // snap constrained + this->_setToNearestHorizVert(p, state); + } else { + // snap freely + std::optional<Geom::Point> origin = this->npoints > 0 ? this->p[0] : std::optional<Geom::Point>(); + spdc_endpoint_snap_free(this, p, origin, state); // pass the origin, to allow for perpendicular / tangential snapping + } + } +} + +/** + * Snaps new node's handle relative to the new node. + */ +void PenTool::_endpointSnapHandle(Geom::Point &p, guint const state) { + g_return_if_fail(( this->npoints == 2 || + this->npoints == 5 )); + + if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping + spdc_endpoint_snap_rotation(this, p, this->p[this->npoints - 2], state); + } else { + if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above + std::optional<Geom::Point> origin = this->p[this->npoints - 2]; + spdc_endpoint_snap_free(this, p, origin, state); + } + } +} + +bool PenTool::item_handler(SPItem* item, GdkEvent* event) { + bool ret = false; + + switch (event->type) { + case GDK_BUTTON_PRESS: + ret = this->_handleButtonPress(event->button); + break; + case GDK_BUTTON_RELEASE: + ret = this->_handleButtonRelease(event->button); + break; + default: + break; + } + + if (!ret) { + ret = FreehandBase::item_handler(item, event); + } + + return ret; +} + +/** + * Callback to handle all pen events. + */ +bool PenTool::root_handler(GdkEvent* event) { + bool ret = false; + + switch (event->type) { + case GDK_BUTTON_PRESS: + ret = this->_handleButtonPress(event->button); + break; + + case GDK_MOTION_NOTIFY: + ret = this->_handleMotionNotify(event->motion); + break; + + case GDK_BUTTON_RELEASE: + ret = this->_handleButtonRelease(event->button); + break; + + case GDK_2BUTTON_PRESS: + ret = this->_handle2ButtonPress(event->button); + break; + + case GDK_KEY_PRESS: + ret = this->_handleKeyPress(event); + break; + + default: + break; + } + + if (!ret) { + ret = FreehandBase::root_handler(event); + } + + return ret; +} + +/** + * Handle mouse button press event. + */ +bool PenTool::_handleButtonPress(GdkEventButton const &bevent) { + if (this->events_disabled) { + // skip event processing if events are disabled + return false; + } + + Geom::Point const event_w(bevent.x, bevent.y); + Geom::Point event_dt(_desktop->w2d(event_w)); + //Test whether we hit any anchor. + SPDrawAnchor * const anchor = spdc_test_inside(this, event_w); + + //with this we avoid creating a new point over the existing one + if(bevent.button != 3 && (this->spiro || this->bspline) && this->npoints > 0 && this->p[0] == this->p[3]){ + if( anchor && anchor == this->sa && this->green_curve->is_unset()){ + //remove the following line to avoid having one node on top of another + _finishSegment(event_dt, bevent.state); + _finish(true); + return true; + } + return false; + } + + bool ret = false; + if (bevent.button == 1 + // make sure this is not the last click for a waiting LPE (otherwise we want to finish the path) + && this->expecting_clicks_for_LPE != 1) { + if (Inkscape::have_viable_layer(_desktop, defaultMessageContext()) == false) { + return true; + } + + grabCanvasEvents(); + + pen_drag_origin_w = event_w; + pen_within_tolerance = true; + + switch (this->mode) { + + case PenTool::MODE_CLICK: + // In click mode we add point on release + switch (this->state) { + case PenTool::POINT: + case PenTool::CONTROL: + case PenTool::CLOSE: + break; + case PenTool::STOP: + // This is allowed, if we just canceled curve + this->state = PenTool::POINT; + break; + default: + break; + } + break; + case PenTool::MODE_DRAG: + switch (this->state) { + case PenTool::STOP: + // This is allowed, if we just canceled curve + case PenTool::POINT: + if (this->npoints == 0) { + this->_bsplineSpiroColor(); + Geom::Point p; + if ((bevent.state & GDK_CONTROL_MASK) && (this->polylines_only || this->polylines_paraxial)) { + p = event_dt; + if (!(bevent.state & GDK_SHIFT_MASK)) { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE); + m.unSetup(); + } + spdc_create_single_dot(this, p, "/tools/freehand/pen", bevent.state); + ret = true; + break; + } + + // TODO: Perhaps it would be nicer to rearrange the following case + // distinction so that the case of a waiting LPE is treated separately + + // Set start anchor + + sa = anchor; + if (anchor) { + //Put the start overwrite curve always on the same direction + if (anchor->start) { + sa_overwrited = std::make_shared<SPCurve>(sa->curve->reversed()); + } else { + sa_overwrited = std::make_shared<SPCurve>(*sa->curve); + } + _bsplineSpiroStartAnchor(bevent.state & GDK_SHIFT_MASK); + } + if (anchor && (!this->hasWaitingLPE()|| this->bspline || this->spiro)) { + // Adjust point to anchor if needed; if we have a waiting LPE, we need + // a fresh path to be created so don't continue an existing one + p = anchor->dp; + _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path")); + } else { + // This is the first click of a new curve; deselect item so that + // this curve is not combined with it (unless it is drawn from its + // anchor, which is handled by the sibling branch above) + Inkscape::Selection * const selection = _desktop->getSelection(); + if (!(bevent.state & GDK_SHIFT_MASK) || this->hasWaitingLPE()) { + // if we have a waiting LPE, we need a fresh path to be created + // so don't append to an existing one + selection->clear(); + _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path")); + } else if (selection->singleItem() && is<SPPath>(selection->singleItem())) { + _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path")); + } + + // Create green anchor + p = event_dt; + _endpointSnap(p, bevent.state); + green_anchor = std::make_unique<SPDrawAnchor>(this, green_curve, true, p); + } + this->_setInitialPoint(p); + } else { + // Set end anchor + this->ea = anchor; + Geom::Point p; + if (anchor) { + p = anchor->dp; + // we hit an anchor, will finish the curve (either with or without closing) + // in release handler + this->state = PenTool::CLOSE; + + if (this->green_anchor && this->green_anchor->active) { + // we clicked on the current curve start, so close it even if + // we drag a handle away from it + this->green_closed = true; + } + ret = true; + break; + + } else { + p = event_dt; + this->_endpointSnap(p, bevent.state); // Snap node only if not hitting anchor. + this->_setSubsequentPoint(p, true); + } + } + // avoid the creation of a control point so a node is created in the release event + this->state = (this->spiro || this->bspline || this->polylines_only) ? PenTool::POINT : PenTool::CONTROL; + ret = true; + break; + case PenTool::CONTROL: + g_warning("Button down in CONTROL state"); + break; + case PenTool::CLOSE: + g_warning("Button down in CLOSE state"); + break; + default: + break; + } + break; + default: + break; + } + } else if (this->expecting_clicks_for_LPE == 1 && this->npoints != 0) { + // when the last click for a waiting LPE occurs we want to finish the path + this->_finishSegment(event_dt, bevent.state); + if (this->green_closed) { + // finishing at the start anchor, close curve + this->_finish(true); + } else { + // finishing at some other anchor, finish curve but not close + this->_finish(false); + } + + ret = true; + } else if (bevent.button == 3 && this->npoints != 0 && !_button1on) { + // right click - finish path, but only if the left click isn't pressed. + this->ea = nullptr; // unset end anchor if set (otherwise crashes) + this->_finish(false); + ret = true; + } + + if (this->expecting_clicks_for_LPE > 0) { + --this->expecting_clicks_for_LPE; + } + + return ret; +} + +/** + * Handle motion_notify event. + */ +bool PenTool::_handleMotionNotify(GdkEventMotion const &mevent) { + bool ret = false; + + if (mevent.state & GDK_BUTTON2_MASK) { + // allow scrolling + return false; + } + + if (this->events_disabled) { + // skip motion events if pen events are disabled + return false; + } + + Geom::Point const event_w(mevent.x, mevent.y); + + //we take out the function the const "tolerance" because we need it later + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); + + if (pen_within_tolerance) { + if ( Geom::LInfty( event_w - pen_drag_origin_w ) < tolerance ) { + return false; // Do not drag if we're within tolerance from origin. + } + } + // Once the user has moved farther than tolerance from the original location + // (indicating they intend to move the object, not click), then always process the + // motion notify coordinates as given (no snapping back to origin) + pen_within_tolerance = false; + + // Find desktop coordinates + Geom::Point p = _desktop->w2d(event_w); + + // Test, whether we hit any anchor + SPDrawAnchor *anchor = spdc_test_inside(this, event_w); + + switch (this->mode) { + case PenTool::MODE_CLICK: + switch (this->state) { + case PenTool::POINT: + if ( this->npoints != 0 ) { + // Only set point, if we are already appending + this->_endpointSnap(p, mevent.state); + this->_setSubsequentPoint(p, true); + ret = true; + } else if (!this->sp_event_context_knot_mouseover()) { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE)); + m.unSetup(); + } + break; + case PenTool::CONTROL: + case PenTool::CLOSE: + // Placing controls is last operation in CLOSE state + this->_endpointSnap(p, mevent.state); + this->_setCtrl(p, mevent.state); + ret = true; + break; + case PenTool::STOP: + if (!this->sp_event_context_knot_mouseover()) { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE)); + m.unSetup(); + } + break; + default: + break; + } + break; + case PenTool::MODE_DRAG: + switch (this->state) { + case PenTool::POINT: + if ( this->npoints > 0 ) { + // Only set point, if we are already appending + + if (!anchor) { // Snap node only if not hitting anchor + this->_endpointSnap(p, mevent.state); + this->_setSubsequentPoint(p, true, mevent.state); + } else { + this->_setSubsequentPoint(anchor->dp, false, mevent.state); + } + + if (anchor && !this->anchor_statusbar) { + if(!this->spiro && !this->bspline){ + this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path.")); + }else{ + this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path. Shift+Click make a cusp node")); + } + this->anchor_statusbar = true; + } else if (!anchor && this->anchor_statusbar) { + this->message_context->clear(); + this->anchor_statusbar = false; + } + + ret = true; + } else { + if (anchor && !this->anchor_statusbar) { + if(!this->spiro && !this->bspline){ + this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point.")); + }else{ + this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point. Shift+Click make a cusp node")); + } + this->anchor_statusbar = true; + } else if (!anchor && this->anchor_statusbar) { + this->message_context->clear(); + this->anchor_statusbar = false; + + } + if (!this->sp_event_context_knot_mouseover()) { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE)); + m.unSetup(); + } + } + break; + case PenTool::CONTROL: + case PenTool::CLOSE: + // Placing controls is last operation in CLOSE state + + // snap the handle + + this->_endpointSnapHandle(p, mevent.state); + + if (!this->polylines_only) { + this->_setCtrl(p, mevent.state); + } else { + this->_setCtrl(this->p[1], mevent.state); + } + + gobble_motion_events(GDK_BUTTON1_MASK); + ret = true; + break; + case PenTool::STOP: + // Don't break; fall through to default to do preSnapping + default: + if (!this->sp_event_context_knot_mouseover()) { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE)); + m.unSetup(); + } + break; + } + break; + default: + break; + } + // calls the function "bspline_spiro_motion" when the mouse starts or stops moving + if (this->bspline) { + this->_bsplineSpiroMotion(mevent.state); + } else { + if ( Geom::LInfty( event_w - pen_drag_origin_w ) > (tolerance/2) || mevent.time == 0) { + this->_bsplineSpiroMotion(mevent.state); + pen_drag_origin_w = event_w; + } + } + + return ret; +} + +/** + * Handle mouse button release event. + */ +bool PenTool::_handleButtonRelease(GdkEventButton const &revent) { + if (this->events_disabled) { + // skip event processing if events are disabled + return false; + } + + bool ret = false; + + if (revent.button == 1) { + Geom::Point const event_w(revent.x, revent.y); + + // Find desktop coordinates + Geom::Point p = _desktop->w2d(event_w); + + // Test whether we hit any anchor. + + SPDrawAnchor *anchor = spdc_test_inside(this, event_w); + // if we try to create a node in the same place as another node, we skip + if((!anchor || anchor == this->sa) && (this->spiro || this->bspline) && this->npoints > 0 && this->p[0] == this->p[3]){ + return true; + } + + switch (this->mode) { + case PenTool::MODE_CLICK: + switch (this->state) { + case PenTool::POINT: + this->ea = anchor; + if (anchor) { + p = anchor->dp; + } + this->state = PenTool::CONTROL; + break; + case PenTool::CONTROL: + // End current segment + this->_endpointSnap(p, revent.state); + this->_finishSegment(p, revent.state); + this->state = PenTool::POINT; + break; + case PenTool::CLOSE: + // End current segment + if (!anchor) { // Snap node only if not hitting anchor + this->_endpointSnap(p, revent.state); + } + this->_finishSegment(p, revent.state); + // hude the guide of the penultimate node when closing the curve + if(this->spiro){ + ctrl[1]->hide(); + } + this->_finish(true); + this->state = PenTool::POINT; + break; + case PenTool::STOP: + // This is allowed, if we just canceled curve + this->state = PenTool::POINT; + break; + default: + break; + } + break; + case PenTool::MODE_DRAG: + switch (this->state) { + case PenTool::POINT: + case PenTool::CONTROL: + this->_endpointSnap(p, revent.state); + this->_finishSegment(p, revent.state); + break; + case PenTool::CLOSE: + this->_endpointSnap(p, revent.state); + this->_finishSegment(p, revent.state); + // hide the penultimate node guide when closing the curve + if(this->spiro){ + ctrl[1]->hide(); + } + if (this->green_closed) { + // finishing at the start anchor, close curve + this->_finish(true); + } else { + // finishing at some other anchor, finish curve but not close + this->_finish(false); + } + break; + case PenTool::STOP: + // This is allowed, if we just cancelled curve + break; + default: + break; + } + this->state = PenTool::POINT; + break; + default: + break; + } + + ungrabCanvasEvents(); + + ret = true; + + this->green_closed = false; + } + + // TODO: can we be sure that the path was created correctly? + // TODO: should we offer an option to collect the clicks in a list? + if (this->expecting_clicks_for_LPE == 0 && this->hasWaitingLPE()) { + this->setPolylineMode(); + + Inkscape::Selection *selection = _desktop->getSelection(); + + if (this->waiting_LPE) { + // we have an already created LPE waiting for a path + this->waiting_LPE->acceptParamPath(cast<SPPath>(selection->singleItem())); + selection->add(this->waiting_item); + this->waiting_LPE = nullptr; + } else { + // the case that we need to create a new LPE and apply it to the just-drawn path is + // handled in spdc_check_for_and_apply_waiting_LPE() in draw-context.cpp + } + } + + return ret; +} + +bool PenTool::_handle2ButtonPress(GdkEventButton const &bevent) { + bool ret = false; + // only end on LMB double click. Otherwise horizontal scrolling causes ending of the path + if (this->npoints != 0 && bevent.button == 1 && this->state != PenTool::CLOSE) { + this->_finish(false); + ret = true; + } + return ret; +} + +void PenTool::_redrawAll() { + // green + if (! this->green_bpaths.empty()) { + // remove old piecewise green canvasitems + this->green_bpaths.clear(); + + // one canvas bpath for all of green_curve + auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), copy_pathvector_optional(green_curve), true); + canvas_shape->set_stroke(green_color); + canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); + this->green_bpaths.emplace_back(canvas_shape); + } + if (this->green_anchor) { + this->green_anchor->ctrl->set_position(this->green_anchor->dp); + } + + red_curve.reset(); + red_curve.moveto(p[0]); + red_curve.curveto(p[1], p[2], p[3]); + red_bpath->set_bpath(&red_curve, true); + + for (auto &c : ctrl) { + c->hide(); + } + // handles + // hide the handlers in bspline and spiro modes + if (this->npoints == 5) { + ctrl[0]->set_position(p[0]); + ctrl[0]->show(); + ctrl[3]->set_position(p[3]); + ctrl[3]->show(); + } + + if (this->p[0] != this->p[1] && !this->spiro && !this->bspline) { + ctrl[1]->set_position(p[1]); + ctrl[1]->show(); + cl1->set_coords(p[0], p[1]); + cl1->show(); + } else { + cl1->hide(); + } + + Geom::Curve const * last_seg = this->green_curve->last_segment(); + if (last_seg) { + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( last_seg ); + // hide the handlers in bspline and spiro modes + if ( cubic && + (*cubic)[2] != this->p[0] && !this->spiro && !this->bspline ) + { + Geom::Point p2 = (*cubic)[2]; + ctrl[2]->set_position(p2); + ctrl[2]->show(); + cl0->set_coords(p2, p[0]); + cl0->show(); + } else { + cl0->hide(); + } + } + + // simply redraw the spiro. because its a redrawing, we don't call the global function, + // but we call the redrawing at the ending. + this->_bsplineSpiroBuild(); +} + +void PenTool::_lastpointMove(gdouble x, gdouble y) { + if (this->npoints != 5) + return; + + y *= -_desktop->yaxisdir(); + + // green + if (!this->green_curve->is_unset()) { + this->green_curve->last_point_additive_move( Geom::Point(x,y) ); + } else { + // start anchor too + if (this->green_anchor) { + this->green_anchor->dp += Geom::Point(x, y); + } + } + + // red + + this->p[0] += Geom::Point(x, y); + this->p[1] += Geom::Point(x, y); + this->_redrawAll(); +} + +void PenTool::_lastpointMoveScreen(gdouble x, gdouble y) { + this->_lastpointMove(x / _desktop->current_zoom(), y / _desktop->current_zoom()); +} + +void PenTool::_lastpointToCurve() { + // avoid that if the "red_curve" contains only two points ( rect ), it doesn't stop here. + if (this->npoints != 5 && !this->spiro && !this->bspline) + return; + + this->p[1] = this->red_curve.last_segment()->initialPoint() + (1./3.)*(*this->red_curve.last_point() - this->red_curve.last_segment()->initialPoint()); + //modificate the last segment of the green curve so it creates the type of node we need + if (this->spiro||this->bspline) { + if (!this->green_curve->is_unset()) { + Geom::Point A(0,0); + Geom::Point B(0,0); + Geom::Point C(0,0); + Geom::Point D(0,0); + Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const *>( this->green_curve->last_segment() ); + //We obtain the last segment 4 points in the previous curve + if ( cubic ){ + A = (*cubic)[0]; + B = (*cubic)[1]; + if (this->spiro) { + C = this->p[0] + (this->p[0] - this->p[1]); + } else { + C = *this->green_curve->last_point() + (1./3.)*(this->green_curve->last_segment()->initialPoint() - *this->green_curve->last_point()); + } + D = (*cubic)[3]; + } else { + A = this->green_curve->last_segment()->initialPoint(); + B = this->green_curve->last_segment()->initialPoint(); + if (this->spiro) { + C = this->p[0] + (this->p[0] - this->p[1]); + } else { + C = *this->green_curve->last_point() + (1./3.)*(this->green_curve->last_segment()->initialPoint() - *this->green_curve->last_point()); + } + D = *this->green_curve->last_point(); + } + auto previous = std::make_shared<SPCurve>(); + previous->moveto(A); + previous->curveto(B, C, D); + if (green_curve->get_segment_count() == 1) { + green_curve = std::move(previous); + } else { + //we eliminate the last segment + green_curve->backspace(); + //and we add it again with the recreation + green_curve->append_continuous(*previous); + } + } + //if the last node is an union with another curve + if (this->green_curve->is_unset() && this->sa && !this->sa->curve->is_unset()) { + this->_bsplineSpiroStartAnchor(false); + } + } + + this->_redrawAll(); +} + + +void PenTool::_lastpointToLine() { + // avoid that if the "red_curve" contains only two points ( rect) it doesn't stop here. + if (this->npoints != 5 && !this->bspline) + return; + + // modify the last segment of the green curve so the type of node we want is created. + if(this->spiro || this->bspline){ + if(!this->green_curve->is_unset()){ + Geom::Point A(0,0); + Geom::Point B(0,0); + Geom::Point C(0,0); + Geom::Point D(0,0); + auto previous = std::make_shared<SPCurve>(); + if (auto const cubic = dynamic_cast<Geom::CubicBezier const *>(green_curve->last_segment())) { + A = green_curve->last_segment()->initialPoint(); + B = (*cubic)[1]; + C = *green_curve->last_point(); + D = C; + } else { + //We obtain the last segment 4 points in the previous curve + A = green_curve->last_segment()->initialPoint(); + B = A; + C = *green_curve->last_point(); + D = C; + } + previous->moveto(A); + previous->curveto(B, C, D); + if (green_curve->get_segment_count() == 1){ + green_curve = std::move(previous); + }else{ + //we eliminate the last segment + green_curve->backspace(); + //and we add it again with the recreation + green_curve->append_continuous(*previous); + } + } + // if the last node is an union with another curve + if (green_curve->is_unset() && sa && !sa->curve->is_unset()) { + _bsplineSpiroStartAnchor(true); + } + } + + this->p[1] = this->p[0]; + this->_redrawAll(); +} + + +bool PenTool::_handleKeyPress(GdkEvent *event) { + bool ret = false; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px + + // Check for undo/redo. + if (npoints > 0 && _undo.isTriggeredBy(&event->key)) { + return _undoLastPoint(true); + } else if (_redo.isTriggeredBy(&event->key)) { + return _redoLastPoint(); + } + + switch (get_latin_keyval (&event->key)) { + case GDK_KEY_Left: // move last point left + case GDK_KEY_KP_Left: + if (!MOD__CTRL(event)) { // not ctrl + if (MOD__ALT(event)) { // alt + if (MOD__SHIFT(event)) { + this->_lastpointMoveScreen(-10, 0); // shift + } + else { + this->_lastpointMoveScreen(-1, 0); // no shift + } + } + else { // no alt + if (MOD__SHIFT(event)) { + this->_lastpointMove(-10*nudge, 0); // shift + } + else { + this->_lastpointMove(-nudge, 0); // no shift + } + } + ret = true; + } + break; + case GDK_KEY_Up: // move last point up + case GDK_KEY_KP_Up: + if (!MOD__CTRL(event)) { // not ctrl + if (MOD__ALT(event)) { // alt + if (MOD__SHIFT(event)) { + this->_lastpointMoveScreen(0, 10); // shift + } + else { + this->_lastpointMoveScreen(0, 1); // no shift + } + } + else { // no alt + if (MOD__SHIFT(event)) { + this->_lastpointMove(0, 10*nudge); // shift + } + else { + this->_lastpointMove(0, nudge); // no shift + } + } + ret = true; + } + break; + case GDK_KEY_Right: // move last point right + case GDK_KEY_KP_Right: + if (!MOD__CTRL(event)) { // not ctrl + if (MOD__ALT(event)) { // alt + if (MOD__SHIFT(event)) { + this->_lastpointMoveScreen(10, 0); // shift + } + else { + this->_lastpointMoveScreen(1, 0); // no shift + } + } + else { // no alt + if (MOD__SHIFT(event)) { + this->_lastpointMove(10*nudge, 0); // shift + } + else { + this->_lastpointMove(nudge, 0); // no shift + } + } + ret = true; + } + break; + case GDK_KEY_Down: // move last point down + case GDK_KEY_KP_Down: + if (!MOD__CTRL(event)) { // not ctrl + if (MOD__ALT(event)) { // alt + if (MOD__SHIFT(event)) { + this->_lastpointMoveScreen(0, -10); // shift + } + else { + this->_lastpointMoveScreen(0, -1); // no shift + } + } + else { // no alt + if (MOD__SHIFT(event)) { + this->_lastpointMove(0, -10*nudge); // shift + } + else { + this->_lastpointMove(0, -nudge); // no shift + } + } + ret = true; + } + break; + +/*TODO: this is not yet enabled?? looks like some traces of the Geometry tool + case GDK_KEY_P: + case GDK_KEY_p: + if (MOD__SHIFT_ONLY(event)) { + sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PARALLEL, 2); + ret = true; + } + break; + + case GDK_KEY_C: + case GDK_KEY_c: + if (MOD__SHIFT_ONLY(event)) { + sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::CIRCLE_3PTS, 3); + ret = true; + } + break; + + case GDK_KEY_B: + case GDK_KEY_b: + if (MOD__SHIFT_ONLY(event)) { + sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PERP_BISECTOR, 2); + ret = true; + } + break; + + case GDK_KEY_A: + case GDK_KEY_a: + if (MOD__SHIFT_ONLY(event)) { + sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::ANGLE_BISECTOR, 3); + ret = true; + } + break; +*/ + + case GDK_KEY_U: + case GDK_KEY_u: + if (MOD__SHIFT_ONLY(event)) { + this->_lastpointToCurve(); + ret = true; + } + break; + case GDK_KEY_L: + case GDK_KEY_l: + if (MOD__SHIFT_ONLY(event)) { + this->_lastpointToLine(); + ret = true; + } + break; + + case GDK_KEY_Return: + case GDK_KEY_KP_Enter: + if (this->npoints != 0) { + this->ea = nullptr; // unset end anchor if set (otherwise crashes) + if(MOD__SHIFT_ONLY(event)) { + // All this is needed to stop the last control + // point dispeating and stop making an n-1 shape. + Geom::Point const p(0, 0); + if(this->red_curve.is_unset()) { + this->red_curve.moveto(p); + } + this->_finishSegment(p, 0); + this->_finish(true); + } else { + this->_finish(false); + } + ret = true; + } + break; + case GDK_KEY_Escape: + if (this->npoints != 0) { + // if drawing, cancel, otherwise pass it up for deselecting + this->_cancel (); + ret = true; + } + break; + case GDK_KEY_g: + case GDK_KEY_G: + if (MOD__SHIFT_ONLY(event)) { + _desktop->getSelection()->toGuides(); + ret = true; + } + break; + case GDK_KEY_BackSpace: + case GDK_KEY_Delete: + case GDK_KEY_KP_Delete: + ret = _undoLastPoint(); + break; + default: + break; + } + return ret; +} + +void PenTool::_resetColors() { + // Red + this->red_curve.reset(); + this->red_bpath->set_bpath(nullptr); + + // Blue + blue_curve.reset(); + blue_bpath->set_bpath(nullptr); + + // Green + this->green_bpaths.clear(); + this->green_curve->reset(); + this->green_anchor.reset(); + + this->sa = nullptr; + this->ea = nullptr; + + if (this->sa_overwrited) { + this->sa_overwrited->reset(); + } + + this->npoints = 0; + this->red_curve_is_valid = false; +} + + +void PenTool::_setInitialPoint(Geom::Point const p) { + g_assert( this->npoints == 0 ); + + this->p[0] = p; + this->p[1] = p; + this->npoints = 2; + this->red_bpath->set_bpath(nullptr); +} + +/** + * Show the status message for the current line/curve segment. + * This type of message always shows angle/distance as the last + * two parameters ("angle %3.2f°, distance %s"). + */ +void PenTool::_setAngleDistanceStatusMessage(Geom::Point const p, int pc_point_to_compare, gchar const *message) { + g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles + g_assert(message != nullptr); + + Geom::Point rel = p - this->p[pc_point_to_compare]; + Inkscape::Util::Quantity q = Inkscape::Util::Quantity(Geom::L2(rel), "px"); + Glib::ustring dist = q.string(_desktop->namedview->display_units); + double angle = atan2(rel[Geom::Y], rel[Geom::X]) * 180 / M_PI; + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if (prefs->getBool("/options/compassangledisplay/value", false) != 0) { + angle = 90 - angle; + + if (_desktop->is_yaxisdown()) { + angle = 180 - angle; + } + + if (angle < 0) { + angle += 360; + } + } + + this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist.c_str()); +} + +// this function changes the colors red, green and blue making them transparent or not, depending on if spiro is being used. +void PenTool::_bsplineSpiroColor() +{ + static Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if (this->spiro){ + this->red_color = 0xff000000; + this->green_color = 0x00ff0000; + } else if(this->bspline) { + this->highlight_color = currentLayer()->highlight_color(); + if((unsigned int)prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff) == this->highlight_color){ + this->green_color = 0xff00007f; + this->red_color = 0xff00007f; + } else { + this->green_color = this->highlight_color; + this->red_color = this->highlight_color; + } + } else { + this->highlight_color = currentLayer()->highlight_color(); + this->red_color = 0xff00007f; + if((unsigned int)prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff) == this->highlight_color){ + this->green_color = 0x00ff007f; + } else { + this->green_color = this->highlight_color; + } + blue_bpath->hide(); + } + + //We erase all the "green_bpaths" to recreate them after with the colour + //transparency recently modified + if (!this->green_bpaths.empty()) { + // remove old piecewise green canvasitems + this->green_bpaths.clear(); + + // one canvas bpath for all of green_curve + auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), copy_pathvector_optional(green_curve), true); + canvas_shape->set_stroke(green_color); + canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); + green_bpaths.emplace_back(canvas_shape); + } + + this->red_bpath->set_stroke(red_color); +} + + +void PenTool::_bsplineSpiro(bool shift) +{ + if(!this->spiro && !this->bspline){ + return; + } + + shift?this->_bsplineSpiroOff():this->_bsplineSpiroOn(); + this->_bsplineSpiroBuild(); +} + +void PenTool::_bsplineSpiroOn() +{ + if(!this->red_curve.is_unset()){ + this->npoints = 5; + this->p[0] = *this->red_curve.first_point(); + this->p[3] = this->red_curve.first_segment()->finalPoint(); + this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]); + } +} + +void PenTool::_bsplineSpiroOff() +{ + if(!this->red_curve.is_unset()){ + this->npoints = 5; + this->p[0] = *this->red_curve.first_point(); + this->p[3] = this->red_curve.first_segment()->finalPoint(); + this->p[2] = this->p[3]; + } +} + +void PenTool::_bsplineSpiroStartAnchor(bool shift) +{ + if(this->sa->curve->is_unset()){ + return; + } + + LivePathEffect::LPEBSpline *lpe_bsp = nullptr; + + if (is<SPLPEItem>(this->white_item) && cast<SPLPEItem>(this->white_item)->hasPathEffect()){ + Inkscape::LivePathEffect::Effect *thisEffect = + cast<SPLPEItem>(this->white_item)->getFirstPathEffectOfType(Inkscape::LivePathEffect::BSPLINE); + if(thisEffect){ + lpe_bsp = dynamic_cast<LivePathEffect::LPEBSpline*>(thisEffect->getLPEObj()->get_lpe()); + } + } + if(lpe_bsp){ + this->bspline = true; + }else{ + this->bspline = false; + } + LivePathEffect::LPESpiro *lpe_spi = nullptr; + + if (is<SPLPEItem>(this->white_item) && cast<SPLPEItem>(this->white_item)->hasPathEffect()){ + Inkscape::LivePathEffect::Effect *thisEffect = + cast<SPLPEItem>(this->white_item)->getFirstPathEffectOfType(Inkscape::LivePathEffect::SPIRO); + if(thisEffect){ + lpe_spi = dynamic_cast<LivePathEffect::LPESpiro*>(thisEffect->getLPEObj()->get_lpe()); + } + } + if(lpe_spi){ + this->spiro = true; + }else{ + this->spiro = false; + } + if(!this->spiro && !this->bspline){ + _bsplineSpiroColor(); + return; + } + if(shift){ + this->_bsplineSpiroStartAnchorOff(); + } else { + this->_bsplineSpiroStartAnchorOn(); + } +} + +void PenTool::_bsplineSpiroStartAnchorOn() +{ + using Geom::X; + using Geom::Y; + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*this->sa_overwrited->last_segment()); + auto last_segment = std::make_shared<SPCurve>(); + Geom::Point point_a = this->sa_overwrited->last_segment()->initialPoint(); + Geom::Point point_d = *this->sa_overwrited->last_point(); + Geom::Point point_c = point_d + (1./3)*(point_a - point_d); + if (cubic) { + last_segment->moveto(point_a); + last_segment->curveto((*cubic)[1],point_c,point_d); + } else { + last_segment->moveto(point_a); + last_segment->curveto(point_a,point_c,point_d); + } + if ( this->sa_overwrited->get_segment_count() == 1){ + this->sa_overwrited = std::move(last_segment); + } else { + //we eliminate the last segment + this->sa_overwrited->backspace(); + //and we add it again with the recreation + sa_overwrited->append_continuous(*last_segment); + } +} + +void PenTool::_bsplineSpiroStartAnchorOff() +{ + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*this->sa_overwrited->last_segment()); + if(cubic){ + auto last_segment = std::make_shared<SPCurve>(); + last_segment->moveto((*cubic)[0]); + last_segment->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); + if( this->sa_overwrited->get_segment_count() == 1){ + this->sa_overwrited = std::move(last_segment); + }else{ + //we eliminate the last segment + this->sa_overwrited->backspace(); + //and we add it again with the recreation + sa_overwrited->append_continuous(*last_segment); + } + } +} + +void PenTool::_bsplineSpiroMotion(guint const state){ + bool shift = state & GDK_SHIFT_MASK; + if(!this->spiro && !this->bspline){ + return; + } + using Geom::X; + using Geom::Y; + if(this->red_curve.is_unset()) return; + this->npoints = 5; + SPCurve tmp_curve; + this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]); + if (this->green_curve->is_unset() && !this->sa) { + this->p[1] = this->p[0] + (1./3)*(this->p[3] - this->p[0]); + if (shift) { + this->p[2] = this->p[3]; + } + } else if (!this->green_curve->is_unset()){ + tmp_curve = *green_curve; + } else { + tmp_curve = *sa_overwrited; + } + if ((state & GDK_MOD1_MASK ) && previous != Geom::Point(0,0)) { //ALT drag + this->p[0] = this->p[0] + (this->p[3] - previous); + } + if(!tmp_curve.is_unset()){ + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(tmp_curve.last_segment()); + if ((state & GDK_MOD1_MASK ) && !Geom::are_near(*tmp_curve.last_point(), this->p[0], 0.1)) + { + SPCurve previous_weight_power; + previous_weight_power.moveto(tmp_curve.last_segment()->initialPoint()); + previous_weight_power.lineto(this->p[0]); + auto SBasisweight_power = previous_weight_power.first_segment()->toSBasis(); + if (tmp_curve.get_segment_count() == 1) { + Geom::Point initial = tmp_curve.last_segment()->initialPoint(); + tmp_curve.reset(); + tmp_curve.moveto(initial); + } else { + tmp_curve.backspace(); + } + if(this->bspline && cubic && !Geom::are_near((*cubic)[2],(*cubic)[3])){ + tmp_curve.curveto(SBasisweight_power.valueAt(0.33334), SBasisweight_power.valueAt(0.66667), this->p[0]); + } else if(this->bspline && cubic) { + tmp_curve.curveto(SBasisweight_power.valueAt(0.33334), this->p[0], this->p[0]); + } else if (cubic && !Geom::are_near((*cubic)[2],(*cubic)[3])) { + tmp_curve.curveto((*cubic)[1], (*cubic)[2] + (this->p[3] - previous), this->p[0]); + } else if (cubic){ + tmp_curve.curveto((*cubic)[1], this->p[0], this->p[0]); + } else { + tmp_curve.lineto(this->p[0]); + } + cubic = dynamic_cast<Geom::CubicBezier const*>(tmp_curve.last_segment()); + if (sa && green_curve->is_unset()) { + sa_overwrited = std::make_shared<SPCurve>(tmp_curve); + } + green_curve = std::make_shared<SPCurve>(std::move(tmp_curve)); + } + if (cubic) { + if (this->bspline) { + SPCurve weight_power; + weight_power.moveto(red_curve.last_segment()->initialPoint()); + weight_power.lineto(*red_curve.last_point()); + auto SBasisweight_power = weight_power.first_segment()->toSBasis(); + this->p[1] = SBasisweight_power.valueAt(0.33334); + if (Geom::are_near(this->p[1],this->p[0])) { + this->p[1] = this->p[0]; + } + if (shift) { + this->p[2] = this->p[3]; + } + if(Geom::are_near((*cubic)[3], (*cubic)[2])) { + this->p[1] = this->p[0]; + } + } else { + this->p[1] = (*cubic)[3] + ((*cubic)[3] - (*cubic)[2] ); + } + } else { + this->p[1] = this->p[0]; + if (shift) { + this->p[2] = this->p[3]; + } + } + previous = *red_curve.last_point(); + SPCurve red; + red.moveto(this->p[0]); + red.curveto(this->p[1],this->p[2],this->p[3]); + red_bpath->set_bpath(&red, true); + } + + if(this->anchor_statusbar && !this->red_curve.is_unset()){ + if(shift){ + this->_bsplineSpiroEndAnchorOff(); + }else{ + this->_bsplineSpiroEndAnchorOn(); + } + } + + // remove old piecewise green canvasitems + green_bpaths.clear(); + + // one canvas bpath for all of green_curve + auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), copy_pathvector_optional(green_curve), true); + canvas_shape->set_stroke(green_color); + canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); + green_bpaths.emplace_back(canvas_shape); + + this->_bsplineSpiroBuild(); +} + +void PenTool::_bsplineSpiroEndAnchorOn() +{ + + using Geom::X; + using Geom::Y; + this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]); + SPCurve tmp_curve; + SPCurve last_segment; + Geom::Point point_c(0,0); + if( green_anchor && green_anchor->active ){ + tmp_curve = green_curve->reversed(); + if (green_curve->get_segment_count() == 0) { + return; + } + } else if(this->sa){ + tmp_curve = sa_overwrited->reversed(); + }else{ + return; + } + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(tmp_curve.last_segment()); + if(this->bspline){ + point_c = *tmp_curve.last_point() + (1./3)*(tmp_curve.last_segment()->initialPoint() - *tmp_curve.last_point()); + } else { + point_c = this->p[3] + this->p[3] - this->p[2]; + } + if (cubic) { + last_segment.moveto((*cubic)[0]); + last_segment.curveto((*cubic)[1],point_c,(*cubic)[3]); + } else { + last_segment.moveto(tmp_curve.last_segment()->initialPoint()); + last_segment.lineto(*tmp_curve.last_point()); + } + if ( tmp_curve.get_segment_count() == 1){ + tmp_curve = std::move(last_segment); + } else { + //we eliminate the last segment + tmp_curve.backspace(); + //and we add it again with the recreation + tmp_curve.append_continuous(std::move(last_segment)); + } + tmp_curve.reverse(); + if (green_anchor && green_anchor->active) { + green_curve->reset(); + green_curve = std::make_shared<SPCurve>(std::move(tmp_curve)); + } else { + sa_overwrited->reset(); + sa_overwrited = std::make_shared<SPCurve>(std::move(tmp_curve)); + } +} + +void PenTool::_bsplineSpiroEndAnchorOff() +{ + SPCurve tmp_curve; + SPCurve last_segment; + this->p[2] = this->p[3]; + if (green_anchor && green_anchor->active) { + tmp_curve = green_curve->reversed(); + if (green_curve->get_segment_count() == 0) { + return; + } + } else if (sa) { + tmp_curve = sa_overwrited->reversed(); + } else { + return; + } + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(tmp_curve.last_segment()); + if (cubic) { + last_segment.moveto((*cubic)[0]); + last_segment.curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); + } else { + last_segment.moveto(tmp_curve.last_segment()->initialPoint()); + last_segment.lineto(*tmp_curve.last_point()); + } + if ( tmp_curve.get_segment_count() == 1){ + tmp_curve = std::move(last_segment); + } else{ + //we eliminate the last segment + tmp_curve.backspace(); + //and we add it again with the recreation + tmp_curve.append_continuous(std::move(last_segment)); + } + tmp_curve.reverse(); + + if (green_anchor && green_anchor->active) { + green_curve->reset(); + green_curve = std::make_shared<SPCurve>(std::move(tmp_curve)); + } else { + sa_overwrited->reset(); + sa_overwrited = std::make_shared<SPCurve>(std::move(tmp_curve)); + } +} + +//prepares the curves for its transformation into BSpline curve. +void PenTool::_bsplineSpiroBuild() +{ + if (!spiro && !bspline){ + return; + } + + //We create the base curve + SPCurve curve; + //If we continuate the existing curve we add it at the start + if (sa && !sa->curve->is_unset()){ + curve = *sa_overwrited; + } + + if (!green_curve->is_unset()) { + curve.append_continuous(*green_curve); + } + + //and the red one + if (!this->red_curve.is_unset()){ + this->red_curve.reset(); + this->red_curve.moveto(this->p[0]); + if(this->anchor_statusbar && !this->sa && !(this->green_anchor && this->green_anchor->active)){ + this->red_curve.curveto(this->p[1],this->p[3],this->p[3]); + }else{ + this->red_curve.curveto(this->p[1],this->p[2],this->p[3]); + } + red_bpath->set_bpath(&red_curve, true); + curve.append_continuous(red_curve); + } + previous = *this->red_curve.last_point(); + if(!curve.is_unset()){ + // close the curve if the final points of the curve are close enough + if(Geom::are_near(curve.first_path()->initialPoint(), curve.last_path()->finalPoint())){ + curve.closepath_current(); + } + //TODO: CALL TO CLONED FUNCTION SPIRO::doEffect IN lpe-spiro.cpp + //For example + //using namespace Inkscape::LivePathEffect; + //LivePathEffectObject *lpeobj = static_cast<LivePathEffectObject*> (curve); + //Effect *spr = static_cast<Effect*> ( new LPEbspline(lpeobj) ); + //spr->doEffect(curve); + if (bspline) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + Geom::PathVector hp; + bool uniform = false; + Glib::ustring pref_path = "/live_effects/bspline/uniform"; + if (prefs->getEntry(pref_path).isValid()) { + uniform = prefs->getString(pref_path) == "true"; + } + LivePathEffect::sp_bspline_do_effect(curve, 0, hp, uniform); + } else { + LivePathEffect::sp_spiro_do_effect(curve); + } + + blue_bpath->set_bpath(&curve, true); + blue_bpath->set_stroke(blue_color); + blue_bpath->show(); + + blue_curve.reset(); + //We hide the holders that doesn't contribute anything + for (auto &c : ctrl) { + c->hide(); + } + if (spiro){ + ctrl[1]->set_position(p[0]); + ctrl[1]->show(); + } + cl0->hide(); + cl1->hide(); + } else { + //if the curve is empty + blue_bpath->hide(); + } +} + +void PenTool::_setSubsequentPoint(Geom::Point const p, bool statusbar, guint status) { + g_assert( this->npoints != 0 ); + + // todo: Check callers to see whether 2 <= npoints is guaranteed. + + this->p[2] = p; + this->p[3] = p; + this->p[4] = p; + this->npoints = 5; + this->red_curve.reset(); + bool is_curve; + this->red_curve.moveto(this->p[0]); + if (this->polylines_paraxial && !statusbar) { + // we are drawing horizontal/vertical lines and hit an anchor; + Geom::Point const origin = this->p[0]; + // if the previous point and the anchor are not aligned either horizontally or vertically... + if ((std::abs(p[Geom::X] - origin[Geom::X]) > 1e-9) && (std::abs(p[Geom::Y] - origin[Geom::Y]) > 1e-9)) { + // ...then we should draw an L-shaped path, consisting of two paraxial segments + Geom::Point intermed = p; + this->_setToNearestHorizVert(intermed, status); + this->red_curve.lineto(intermed); + } + this->red_curve.lineto(p); + is_curve = false; + } else { + // one of the 'regular' modes + if (this->p[1] != this->p[0] || this->spiro) { + this->red_curve.curveto(this->p[1], p, p); + is_curve = true; + } else { + this->red_curve.lineto(p); + is_curve = false; + } + } + + red_bpath->set_bpath(&red_curve, true); + + if (statusbar) { + gchar *message; + if(this->spiro || this->bspline){ + message = is_curve ? + _("<b>Curve segment</b>: angle %3.2f°; <b>Shift+Click</b> creates cusp node, <b>ALT</b> moves previous, <b>Enter</b> or <b>Shift+Enter</b> to finish" ): + _("<b>Line segment</b>: angle %3.2f°; <b>Shift+Click</b> creates cusp node, <b>ALT</b> moves previous, <b>Enter</b> or <b>Shift+Enter</b> to finish"); + this->_setAngleDistanceStatusMessage(p, 0, message); + } else { + message = is_curve ? + _("<b>Curve segment</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> or <b>Shift+Enter</b> to finish the path" ): + _("<b>Line segment</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> or <b>Shift+Enter</b> to finish the path"); + this->_setAngleDistanceStatusMessage(p, 0, message); + } + + } +} + +void PenTool::_setCtrl(Geom::Point const q, guint const state) +{ + // use 'q' as 'p' shadows member variable. + for (auto &c : ctrl) { + c->hide(); + } + + ctrl[1]->show(); + cl1->show(); + + if ( this->npoints == 2 ) { + this->p[1] = q; + cl0->hide(); + ctrl[1]->set_position(p[1]); + ctrl[1]->show(); + cl1->set_coords(p[0], p[1]); + this->_setAngleDistanceStatusMessage(q, 0, _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle")); + } else if ( this->npoints == 5 ) { + this->p[4] = q; + cl0->show(); + bool is_symm = false; + if ( ( ( this->mode == PenTool::MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) || + ( ( this->mode == PenTool::MODE_DRAG ) && !( state & GDK_SHIFT_MASK ) ) ) { + Geom::Point delta = q - this->p[3]; + this->p[2] = this->p[3] - delta; + is_symm = true; + this->red_curve.reset(); + this->red_curve.moveto(this->p[0]); + this->red_curve.curveto(this->p[1], this->p[2], this->p[3]); + red_bpath->set_bpath(&red_curve, true); + } + // Avoid conflicting with initial point ctrl + if (green_curve->get_segment_count() > 0) { + ctrl[0]->set_position(this->p[0]); + ctrl[0]->show(); + } + ctrl[3]->set_position(this->p[3]); + ctrl[3]->show(); + ctrl[2]->set_position(this->p[2]); + ctrl[2]->show(); + ctrl[1]->set_position(this->p[4]); + ctrl[1]->show(); + + cl0->set_coords(this->p[3], this->p[2]); + cl1->set_coords(this->p[3], this->p[4]); + + gchar *message = is_symm ? + _("<b>Curve handle, symmetric</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") : + _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only"); + this->_setAngleDistanceStatusMessage(q, 3, message); + } else { + g_warning("Something bad happened - npoints is %d", this->npoints); + } +} + +void PenTool::_finishSegment(Geom::Point const q, guint const state) { // use 'q' as 'p' shadows member variable. + if (this->polylines_paraxial) { + this->nextParaxialDirection(q, this->p[0], state); + } + + if (!this->red_curve.is_unset()) { + this->_bsplineSpiro(state & GDK_SHIFT_MASK); + if(!this->green_curve->is_unset() && + !Geom::are_near(*this->green_curve->last_point(),this->p[0])) + { + SPCurve lsegment; + Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*this->green_curve->last_segment()); + if (cubic) { + lsegment.moveto((*cubic)[0]); + lsegment.curveto((*cubic)[1], this->p[0] - ((*cubic)[2] - (*cubic)[3]), *this->red_curve.first_point()); + green_curve->backspace(); + green_curve->append_continuous(std::move(lsegment)); + } + } + green_curve->append_continuous(red_curve); + auto curve = red_curve; + + /// \todo fixme: + auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), curve.get_pathvector(), true); + canvas_shape->set_stroke(green_color); + canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); + green_bpaths.emplace_back(canvas_shape); + + this->p[0] = this->p[3]; + this->p[1] = this->p[4]; + this->npoints = 2; + + red_curve.reset(); + _redo_stack.clear(); + } +} + +bool PenTool::_undoLastPoint(bool user_undo) { + bool ret = false; + + if ( this->green_curve->is_unset() || (this->green_curve->last_segment() == nullptr) ) { + if (red_curve.is_unset()) { + return ret; // do nothing; this event should be handled upstream + } + _cancel(); + ret = true; + } else { + red_curve.reset(); + if (user_undo) { + if (_did_redo) { + _redo_stack.clear(); + _did_redo = false; + } + _redo_stack.push_back(green_curve->get_pathvector()); + } + // The code below assumes that this->green_curve has only ONE path ! + Geom::Curve const * crv = this->green_curve->last_segment(); + this->p[0] = crv->initialPoint(); + if ( Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>(crv)) { + this->p[1] = (*cubic)[1]; + + } else { + this->p[1] = this->p[0]; + } + + // assign the value in a third of the distance of the last segment. + if (this->bspline){ + this->p[1] = this->p[0] + (1./3)*(this->p[3] - this->p[0]); + } + + Geom::Point const pt( (this->npoints < 4) ? crv->finalPoint() : this->p[3] ); + + this->npoints = 2; + // delete the last segment of the green curve and green bpath + if (this->green_curve->get_segment_count() == 1) { + this->npoints = 5; + if (!this->green_bpaths.empty()) { + this->green_bpaths.pop_back(); + } + this->green_curve->reset(); + } else { + this->green_curve->backspace(); + if (this->green_bpaths.size() > 1) { + this->green_bpaths.pop_back(); + } else if (this->green_bpaths.size() == 1) { + green_bpaths.back()->set_bpath(green_curve.get(), true); + } + } + + // assign the value of this->p[1] to the opposite of the green line last segment + if (this->spiro){ + Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const *>(this->green_curve->last_segment()); + if ( cubic ) { + this->p[1] = (*cubic)[3] + (*cubic)[3] - (*cubic)[2]; + ctrl[1]->set_position(this->p[0]); + } else { + this->p[1] = this->p[0]; + } + } + + for (auto &c : ctrl) { + c->hide(); + } + cl0->hide(); + cl1->hide(); + this->state = PenTool::POINT; + + if(this->polylines_paraxial) { + // We compare the point we're removing with the nearest horiz/vert to + // see if the line was added with SHIFT or not. + Geom::Point compare(pt); + this->_setToNearestHorizVert(compare, 0); + if ((std::abs(compare[Geom::X] - pt[Geom::X]) > 1e-9) + || (std::abs(compare[Geom::Y] - pt[Geom::Y]) > 1e-9)) { + this->paraxial_angle = this->paraxial_angle.cw(); + } + } + this->_setSubsequentPoint(pt, true); + + //redraw + this->_bsplineSpiroBuild(); + ret = true; + } + + return ret; +} + +/** Re-add the last undone point to the path being drawn */ +bool PenTool::_redoLastPoint() +{ + if (_redo_stack.empty()) { + return false; + } + + auto old_green = std::move(_redo_stack.back()); + _redo_stack.pop_back(); + green_curve->set_pathvector(old_green); + + if (auto const *last_seg = green_curve->last_segment()) { + Geom::Path freshly_added; + freshly_added.append(*last_seg); + green_bpaths.emplace_back(make_canvasitem<CanvasItemBpath>(_desktop->getCanvasSketch(), freshly_added, true)); + } + green_bpaths.back()->set_stroke(green_color); + green_bpaths.back()->set_fill(0x0, SP_WIND_RULE_NONZERO); + + auto const last_point = green_curve->last_point(); + if (last_point) { + p[0] = p[1] = *last_point; + } + _setSubsequentPoint(p[3], true); + _bsplineSpiroBuild(); + + _did_redo = true; + return true; +} + +void PenTool::_finish(gboolean const closed) { + if (this->expecting_clicks_for_LPE > 1) { + // don't let the path be finished before we have collected the required number of mouse clicks + return; + } + + this->_disableEvents(); + + this->message_context->clear(); + + _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished")); + + // cancelate line without a created segment + this->red_curve.reset(); + spdc_concat_colors_and_flush(this, closed); + this->sa = nullptr; + this->ea = nullptr; + + this->npoints = 0; + this->state = PenTool::POINT; + + for (auto &c : ctrl) { + c->hide(); + } + + cl0->hide(); + cl1->hide(); + + this->green_anchor.reset(); + _redo_stack.clear(); + this->_enableEvents(); +} + +void PenTool::_disableEvents() { + this->events_disabled = true; +} + +void PenTool::_enableEvents() { + g_return_if_fail(this->events_disabled != 0); + + this->events_disabled = false; +} + +void PenTool::waitForLPEMouseClicks(Inkscape::LivePathEffect::EffectType effect_type, unsigned int num_clicks, bool use_polylines) { + if (effect_type == Inkscape::LivePathEffect::INVALID_LPE) + return; + + this->waiting_LPE_type = effect_type; + this->expecting_clicks_for_LPE = num_clicks; + this->polylines_only = use_polylines; + this->polylines_paraxial = false; // TODO: think if this is correct for all cases +} + +void PenTool::nextParaxialDirection(Geom::Point const &pt, Geom::Point const &origin, guint state) { + // + // after the first mouse click we determine whether the mouse pointer is closest to a + // horizontal or vertical segment; for all subsequent mouse clicks, we use the direction + // orthogonal to the last one; pressing Shift toggles the direction + // + // num_clicks is not reliable because spdc_pen_finish_segment is sometimes called too early + // (on first mouse release), in which case num_clicks immediately becomes 1. + // if (this->num_clicks == 0) { + + if (this->green_curve->is_unset()) { + // first mouse click + double h = pt[Geom::X] - origin[Geom::X]; + double v = pt[Geom::Y] - origin[Geom::Y]; + this->paraxial_angle = Geom::Point(h, v).ccw(); + } + if(!(state & GDK_SHIFT_MASK)) { + this->paraxial_angle = this->paraxial_angle.ccw(); + } +} + +void PenTool::_setToNearestHorizVert(Geom::Point &pt, guint const state) const { + Geom::Point const origin = this->p[0]; + Geom::Point const target = (state & GDK_SHIFT_MASK) ? this->paraxial_angle : this->paraxial_angle.ccw(); + + // Create a horizontal or vertical constraint line + Inkscape::Snapper::SnapConstraint cl(origin, target); + + // Snap along the constraint line; if we didn't snap then still the constraint will be applied + SnapManager &m = _desktop->namedview->snap_manager; + + Inkscape::Selection *selection = _desktop->getSelection(); + // selection->singleItem() is the item that is currently being drawn. This item will not be snapped to (to avoid self-snapping) + // TODO: Allow snapping to the stationary parts of the item, and only ignore the last segment + + m.setup(_desktop, true, selection->singleItem()); + m.constrainedSnapReturnByRef(pt, Inkscape::SNAPSOURCE_NODE_HANDLE, cl); + m.unSetup(); +} + +} +} +} + +/* + 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:fileencoding=utf-8:textwidth=99 : |