// SPDX-License-Identifier: GPL-2.0-or-later /** \file * Pen event context implementation. */ /* * Authors: * Lauris Kaplinski * bulia byak * Jon A. Cruz * * 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 #include #include #include #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" namespace Inkscape { namespace UI { namespace Tools { static Geom::Point pen_drag_origin_w(0, 0); static bool pen_within_tolerance = false; const double HANDLE_CUBIC_GAP = 0.001; PenTool::PenTool(SPDesktop *desktop, std::string prefs_path, const std::string &cursor_filename) : FreehandBase(desktop, prefs_path, cursor_filename) { tablet_enabled = false; // Pen indicators (temporary handles shown when adding a new node). c0 = new Inkscape::CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_ROTATE); c1 = new Inkscape::CanvasItemCtrl(desktop->getCanvasControls(), Inkscape::CANVAS_ITEM_CTRL_TYPE_ROTATE); c0->set_fill(0x0); c1->set_fill(0x0); c0->hide(); c1->hide(); cl0 = new Inkscape::CanvasItemCurve(desktop->getCanvasControls()); cl1 = new Inkscape::CanvasItemCurve(desktop->getCanvasControls()); 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); } } if (this->c0) { delete c0; } if (this->c1) { delete c1; } if (this->cl0) { delete cl0; } if (this->cl1) { delete cl1; } 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->num_clicks = 0; this->state = PenTool::STOP; this->_resetColors(); c0->hide(); c1->hide(); cl0->hide(); cl1->hide(); this->message_context->clear(); this->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled")); } /** * 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 origin = std::optional(); 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 origin = this->npoints > 0 ? this->p[0] : std::optional(); 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 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 this->sa = anchor; if (anchor) { //Put the start overwrite curve always on the same direction if (anchor->start) { this->sa_overwrited = this->sa->curve->create_reverse(); } else { this->sa_overwrited = this->sa->curve->copy(); } this->_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() && SP_IS_PATH(selection->singleItem())) { _desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path")); } // Create green anchor p = event_dt; this->_endpointSnap(p, bevent.state); this->green_anchor.reset(new SPDrawAnchor(this, this->green_curve.get(), 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, _("Click or click and drag to close and finish the path.")); }else{ this->message_context->set(Inkscape::NORMAL_MESSAGE, _("Click or click and drag 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, _("Click or click and drag to continue the path from this point.")); }else{ this->message_context->set(Inkscape::NORMAL_MESSAGE, _("Click or click and drag 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){ c1->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){ c1->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(SP_PATH(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 for (auto path : this->green_bpaths) { delete path; } this->green_bpaths.clear(); // one canvas bpath for all of green_curve auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), green_curve.get(), true); canvas_shape->set_stroke(green_color); canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); this->green_bpaths.push_back(canvas_shape); } if (this->green_anchor) { this->green_anchor->ctrl->set_position(this->green_anchor->dp); } 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.get(), true); // handles // hide the handlers in bspline and spiro modes if (this->p[0] != this->p[1] && !this->spiro && !this->bspline) { c1->set_position(p[1]); c1->show(); cl1->set_coords(p[0], p[1]); cl1->show(); } else { c1->hide(); cl1->hide(); } Geom::Curve const * last_seg = this->green_curve->last_segment(); if (last_seg) { Geom::CubicBezier const * cubic = dynamic_cast( 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]; c0->set_position(p2); c0->show(); cl0->set_coords(p2, p[0]); cl0->show(); } else { c0->hide(); 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( 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_unique(); previous->moveto(A); previous->curveto(B, C, D); if ( this->green_curve->get_segment_count() == 1) { this->green_curve = std::move(previous); } else { //we eliminate the last segment this->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_unique(); Geom::CubicBezier const * cubic = dynamic_cast( this->green_curve->last_segment() ); if ( cubic ) { A = this->green_curve->last_segment()->initialPoint(); B = (*cubic)[1]; C = *this->green_curve->last_point(); D = C; } else { //We obtain the last segment 4 points in the previous curve A = this->green_curve->last_segment()->initialPoint(); B = A; C = *this->green_curve->last_point(); D = C; } previous->moveto(A); previous->curveto(B, C, D); if( this->green_curve->get_segment_count() == 1){ this->green_curve = std::move(previous); }else{ //we eliminate the last segment this->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(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 if we have started drawing a path. User might have change shortcut. if (this->npoints > 0) { Gtk::AccelKey shortcut = Inkscape::Shortcuts::get_from_event((GdkEventKey*)event); auto app = InkscapeApplication::instance(); auto gapp = app->gtk_app(); auto actions = gapp->get_actions_for_accel(shortcut.get_abbrev()); if (std::find(actions.begin(), actions.end(), "win.undo") != actions.end()) { return _undoLastPoint(); } } 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->selection->toGuides(); ret = true; } break; case GDK_KEY_BackSpace: case GDK_KEY_Delete: case GDK_KEY_KP_Delete: ret = _undoLastPoint(); break; case GDK_KEY_Z: case GDK_KEY_z: if (event->key.state & INK_GDK_PRIMARY_MASK) { ret = _undoLastPoint(); } break; default: break; } return ret; } void PenTool::_resetColors() { // Red this->red_curve->reset(); this->red_bpath->set_bpath(nullptr); // Blue this->blue_curve->reset(); this->blue_bpath->set_bpath(nullptr); // Green for (auto path : this->green_bpaths) { delete path; } 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 for (auto path : this->green_bpaths) { delete path; } this->green_bpaths.clear(); // one canvas bpath for all of green_curve auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), green_curve.get(), true); canvas_shape->set_stroke(green_color); canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); this->green_bpaths.push_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()){ using Geom::X; using Geom::Y; 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]); this->p[2] = Geom::Point(this->p[2][X] + HANDLE_CUBIC_GAP,this->p[2][Y] + HANDLE_CUBIC_GAP); } } 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 (SP_IS_LPE_ITEM(this->white_item) && SP_LPE_ITEM(this->white_item)->hasPathEffect()){ Inkscape::LivePathEffect::Effect *thisEffect = SP_LPE_ITEM(this->white_item)->getFirstPathEffectOfType(Inkscape::LivePathEffect::BSPLINE); if(thisEffect){ lpe_bsp = dynamic_cast(thisEffect->getLPEObj()->get_lpe()); } } if(lpe_bsp){ this->bspline = true; }else{ this->bspline = false; } LivePathEffect::LPESpiro *lpe_spi = nullptr; if (SP_IS_LPE_ITEM(this->white_item) && SP_LPE_ITEM(this->white_item)->hasPathEffect()){ Inkscape::LivePathEffect::Effect *thisEffect = SP_LPE_ITEM(this->white_item)->getFirstPathEffectOfType(Inkscape::LivePathEffect::SPIRO); if(thisEffect){ lpe_spi = dynamic_cast(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(&*this->sa_overwrited ->last_segment()); auto last_segment = std::make_unique(); 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); point_c = Geom::Point(point_c[X] + HANDLE_CUBIC_GAP, point_c[Y] + HANDLE_CUBIC_GAP); 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(&*this->sa_overwrited->last_segment()); if(cubic){ auto last_segment = std::make_unique(); 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; std::unique_ptr tmp_curve(new SPCurve()); this->p[2] = this->p[3] + (1./3)*(this->p[0] - this->p[3]); this->p[2] = Geom::Point(this->p[2][X] + HANDLE_CUBIC_GAP,this->p[2][Y] + HANDLE_CUBIC_GAP); if (this->green_curve->is_unset() && !this->sa) { this->p[1] = this->p[0] + (1./3)*(this->p[3] - this->p[0]); this->p[1] = Geom::Point(this->p[1][X] + HANDLE_CUBIC_GAP, this->p[1][Y] + HANDLE_CUBIC_GAP); if(shift){ this->p[2] = this->p[3]; } } else if (!this->green_curve->is_unset()){ tmp_curve = this->green_curve->copy(); } else { tmp_curve = this->sa_overwrited->copy(); } 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(&*tmp_curve ->last_segment()); if ((state & GDK_MOD1_MASK ) && !Geom::are_near(*tmp_curve ->last_point(), this->p[0], 0.1)) { auto previous_weight_power = std::make_unique(); Geom::D2< Geom::SBasis > SBasisweight_power; previous_weight_power->moveto(tmp_curve ->last_segment()->initialPoint()); previous_weight_power->lineto(this->p[0]); 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(&*tmp_curve ->last_segment()); if (this->sa && this->green_curve->is_unset()) { this->sa_overwrited = tmp_curve->copy(); } this->green_curve = tmp_curve->copy(); } if (cubic) { if (this->bspline) { auto weight_power = std::make_unique(); Geom::D2< Geom::SBasis > SBasisweight_power; weight_power->moveto(this->red_curve->last_segment()->initialPoint()); weight_power->lineto(*this->red_curve->last_point()); 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] = Geom::Point(this->p[1][X] + HANDLE_CUBIC_GAP,this->p[1][Y] + HANDLE_CUBIC_GAP); } else { 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 = *this->red_curve->last_point(); auto red = std::make_unique(); red->moveto(this->p[0]); red->curveto(this->p[1],this->p[2],this->p[3]); this->red_bpath->set_bpath(red.get(), true); } if(this->anchor_statusbar && !this->red_curve->is_unset()){ if(shift){ this->_bsplineSpiroEndAnchorOff(); }else{ this->_bsplineSpiroEndAnchorOn(); } } // remove old piecewise green canvasitems for (auto path: this->green_bpaths) { delete path; } this->green_bpaths.clear(); // one canvas bpath for all of green_curve auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), green_curve.get(), true); canvas_shape->set_stroke(green_color); canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); this->green_bpaths.push_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]); this->p[2] = Geom::Point(this->p[2][X] + HANDLE_CUBIC_GAP,this->p[2][Y] + HANDLE_CUBIC_GAP); std::unique_ptr tmp_curve(new SPCurve()); std::unique_ptr last_segment(new SPCurve()); Geom::Point point_c(0,0); if( this->green_anchor && this->green_anchor->active ){ tmp_curve = this->green_curve->create_reverse(); if(this->green_curve->get_segment_count()==0){ return; } } else if(this->sa){ tmp_curve = this->sa_overwrited->create_reverse(); }else{ return; } Geom::CubicBezier const * cubic = dynamic_cast(&*tmp_curve ->last_segment()); if(this->bspline){ point_c = *tmp_curve ->last_point() + (1./3)*(tmp_curve ->last_segment()->initialPoint() - *tmp_curve ->last_point()); point_c = Geom::Point(point_c[X] + HANDLE_CUBIC_GAP, point_c[Y] + HANDLE_CUBIC_GAP); }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(*last_segment); } tmp_curve = tmp_curve->create_reverse(); if( this->green_anchor && this->green_anchor->active ) { this->green_curve->reset(); this->green_curve = std::move(tmp_curve); }else{ this->sa_overwrited->reset(); this->sa_overwrited = std::move(tmp_curve); } } void PenTool::_bsplineSpiroEndAnchorOff() { std::unique_ptr tmp_curve(new SPCurve()); std::unique_ptr last_segment(new SPCurve()); this->p[2] = this->p[3]; if( this->green_anchor && this->green_anchor->active ){ tmp_curve = this->green_curve->create_reverse(); if(this->green_curve->get_segment_count()==0){ return; } } else if(this->sa){ tmp_curve = this->sa_overwrited->create_reverse(); }else{ return; } Geom::CubicBezier const * cubic = dynamic_cast(&*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(*last_segment); } tmp_curve = tmp_curve->create_reverse(); if( this->green_anchor && this->green_anchor->active ) { this->green_curve->reset(); this->green_curve = std::move(tmp_curve); }else{ this->sa_overwrited->reset(); this->sa_overwrited = std::move(tmp_curve); } } //prepares the curves for its transformation into BSpline curve. void PenTool::_bsplineSpiroBuild() { if(!this->spiro && !this->bspline){ return; } //We create the base curve auto curve = std::make_unique(); //If we continuate the existing curve we add it at the start if(this->sa && !this->sa->curve->is_unset()){ curve = this->sa_overwrited->copy(); } if (!this->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.get(), 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 (curve); //Effect *spr = static_cast ( new LPEbspline(lpeobj) ); //spr->doEffect(curve); if (this->bspline) { Geom::PathVector hp; LivePathEffect::sp_bspline_do_effect(curve.get(), 0, hp); } else { LivePathEffect::sp_spiro_do_effect(curve.get()); } blue_bpath->set_bpath(curve.get(), true); blue_bpath->set_stroke(blue_color); blue_bpath->show(); this->blue_curve->reset(); //We hide the holders that doesn't contribute anything if (this->spiro){ c1->set_position(p[0]); c1->show(); } else { c1->hide(); } c0->hide(); 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.get(), true); if (statusbar) { gchar *message; if(this->spiro || this->bspline){ message = is_curve ? _("Curve segment: angle %3.2f°; Shift+Click creates cusp node, ALT moves previous, Enter or Shift+Enter to finish" ): _("Line segment: angle %3.2f°; Shift+Click creates cusp node, ALT moves previous, Enter or Shift+Enter to finish"); this->_setAngleDistanceStatusMessage(p, 0, message); } else { message = is_curve ? _("Curve segment: angle %3.2f°, distance %s; with Ctrl to snap angle, Enter or Shift+Enter to finish the path" ): _("Line segment: angle %3.2f°, distance %s; with Ctrl to snap angle, Enter or Shift+Enter 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. c1->show(); cl1->show(); if ( this->npoints == 2 ) { this->p[1] = q; c0->hide(); cl0->hide(); c1->set_position(p[1]); cl1->set_coords(p[0], p[1]); this->_setAngleDistanceStatusMessage(q, 0, _("Curve handle: angle %3.2f°, length %s; with Ctrl to snap angle")); } else if ( this->npoints == 5 ) { this->p[4] = q; c0->show(); 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.get(), true); } c0->set_position(this->p[2]); cl0->set_coords(this->p[3], this->p[2]); c1->set_position(this->p[4]); cl1->set_coords(this->p[3], this->p[4]); gchar *message = is_symm ? _("Curve handle, symmetric: angle %3.2f°, length %s; with Ctrl to snap angle, with Shift to move this handle only") : _("Curve handle: angle %3.2f°, length %s; with Ctrl to snap angle, with Shift 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); } ++num_clicks; 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])) { std::unique_ptr lsegment(new SPCurve()); Geom::CubicBezier const * cubic = dynamic_cast(&*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()); this->green_curve->backspace(); green_curve->append_continuous(*lsegment); } } this->green_curve->append_continuous(*red_curve); auto curve = this->red_curve->copy(); /// \todo fixme: auto canvas_shape = new Inkscape::CanvasItemBpath(_desktop->getCanvasSketch(), curve.get(), true); canvas_shape->set_stroke(green_color); canvas_shape->set_fill(0x0, SP_WIND_RULE_NONZERO); this->green_bpaths.push_back(canvas_shape); this->p[0] = this->p[3]; this->p[1] = this->p[4]; this->npoints = 2; this->red_curve->reset(); } } // Partial fix for https://bugs.launchpad.net/inkscape/+bug/171990 // TODO: implement the redo feature bool PenTool::_undoLastPoint() { bool ret = false; if ( this->green_curve->is_unset() || (this->green_curve->last_segment() == nullptr) ) { if (!this->red_curve->is_unset()) { this->_cancel (); ret = true; } else { // do nothing; this event should be handled upstream } } else { // Reset red curve this->red_curve->reset(); // Get last segment if ( this->green_curve->is_unset() ) { g_warning("pen_handle_key_press, case GDK_KP_Delete: Green curve is empty"); return false; } // 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(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()) { delete this->green_bpaths.back(); this->green_bpaths.pop_back(); } this->green_curve->reset(); } else { this->green_curve->backspace(); if (this->green_bpaths.size() > 1) { delete this->green_bpaths.back(); 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(this->green_curve->last_segment()); if ( cubic ) { this->p[1] = (*cubic)[3] + (*cubic)[3] - (*cubic)[2]; c1->set_position(this->p[0]); } else { this->p[1] = this->p[0]; } } c0->hide(); c1->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; } 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->num_clicks = 0; 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; c0->hide(); c1->hide(); cl0->hide(); cl1->hide(); this->green_anchor.reset(); 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 :