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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:29:01 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:29:01 +0000
commit35a96bde514a8897f6f0fcc41c5833bf63df2e2a (patch)
tree657d15a03cc46bd099fc2c6546a7a4ad43815d9f /src/ui/tools/pencil-tool.cpp
parentInitial commit. (diff)
downloadinkscape-35a96bde514a8897f6f0fcc41c5833bf63df2e2a.tar.xz
inkscape-35a96bde514a8897f6f0fcc41c5833bf63df2e2a.zip
Adding upstream version 1.0.2.upstream/1.0.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/ui/tools/pencil-tool.cpp')
-rw-r--r--src/ui/tools/pencil-tool.cpp1239
1 files changed, 1239 insertions, 0 deletions
diff --git a/src/ui/tools/pencil-tool.cpp b/src/ui/tools/pencil-tool.cpp
new file mode 100644
index 0000000..7bb0275
--- /dev/null
+++ b/src/ui/tools/pencil-tool.cpp
@@ -0,0 +1,1239 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * Pencil 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 <gdk/gdkkeysyms.h>
+
+#include "ui/tools/pencil-tool.h"
+#include <2geom/bezier-utils.h>
+#include <2geom/circle.h>
+#include <2geom/sbasis-to-bezier.h>
+#include <2geom/svg-path-parser.h>
+
+#include "desktop.h"
+#include "inkscape.h"
+
+#include "context-fns.h"
+#include "desktop-style.h"
+#include "message-context.h"
+#include "message-stack.h"
+#include "selection-chemistry.h"
+#include "selection.h"
+#include "snap.h"
+
+#include "display/canvas-bpath.h"
+#include "display/curve.h"
+#include "display/sp-canvas.h"
+
+#include "livarot/Path.h" // Simplify paths
+
+#include "live_effects/lpe-powerstroke-interpolators.h"
+#include "live_effects/lpe-powerstroke.h"
+#include "live_effects/lpe-simplify.h"
+#include "live_effects/lpeobject.h"
+
+#include "object/sp-lpe-item.h"
+#include "object/sp-path.h"
+#include "splivarot.h"
+#include "style.h"
+
+#include "ui/pixmaps/cursor-pencil.xpm"
+
+#include "svg/svg.h"
+
+#include "ui/draw-anchor.h"
+#include "ui/tool/event-utils.h"
+
+#include "xml/node.h"
+#include "xml/sp-css-attr.h"
+#include <glibmm/i18n.h>
+// #include <thread>
+// #include <chrono>
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+static Geom::Point pencil_drag_origin_w(0, 0);
+static bool pencil_within_tolerance = false;
+
+static bool in_svg_plane(Geom::Point const &p) { return Geom::LInfty(p) < 1e18; }
+const double HANDLE_CUBIC_GAP = 0.01;
+
+const std::string& PencilTool::getPrefsPath() {
+ return PencilTool::prefsPath;
+}
+
+const std::string PencilTool::prefsPath = "/tools/freehand/pencil";
+
+PencilTool::PencilTool()
+ : FreehandBase(cursor_pencil_xpm)
+ , p()
+ , _npoints(0)
+ , _state(SP_PENCIL_CONTEXT_IDLE)
+ , _req_tangent(0, 0)
+ , _is_drawing(false)
+ , sketch_n(0)
+ , _curve(nullptr)
+ , _pressure_curve(nullptr)
+{
+}
+
+void PencilTool::setup() {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if (prefs->getBool("/tools/freehand/pencil/selcue")) {
+ this->enableSelectionCue();
+ }
+ this->_curve = new SPCurve();
+ this->_pressure_curve = new SPCurve();
+
+ FreehandBase::setup();
+
+ this->_is_drawing = false;
+ this->anchor_statusbar = false;
+}
+
+
+
+PencilTool::~PencilTool() {
+ if (this->_curve) {
+ this->_curve->unref();
+ }
+ if (this->_pressure_curve) {
+ this->_pressure_curve->unref();
+ }
+}
+
+void PencilTool::_extinput(GdkEvent *event) {
+ if (gdk_event_get_axis (event, GDK_AXIS_PRESSURE, &this->pressure)) {
+ this->pressure = CLAMP (this->pressure, DDC_MIN_PRESSURE, DDC_MAX_PRESSURE);
+ is_tablet = true;
+ } else {
+ this->pressure = DDC_DEFAULT_PRESSURE;
+ is_tablet = false;
+ }
+}
+
+/** Snaps new node relative to the previous node. */
+void PencilTool::_endpointSnap(Geom::Point &p, guint const state) {
+ if ((state & GDK_CONTROL_MASK)) { //CTRL enables constrained snapping
+ if (this->_npoints > 0) {
+ spdc_endpoint_snap_rotation(this, p, this->p[0], state);
+ }
+ } else {
+ if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
+ //After all, the user explicitly asked for angular snapping by
+ //pressing CTRL
+ boost::optional<Geom::Point> origin = this->_npoints > 0 ? this->p[0] : boost::optional<Geom::Point>();
+ spdc_endpoint_snap_free(this, p, origin, state);
+ }
+ }
+}
+
+/**
+ * Callback for handling all pencil context events.
+ */
+bool PencilTool::root_handler(GdkEvent* event) {
+ bool ret = false;
+ this->_extinput(event);
+ 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_KEY_PRESS:
+ ret = this->_handleKeyPress(event->key);
+ break;
+
+ case GDK_KEY_RELEASE:
+ ret = this->_handleKeyRelease(event->key);
+ break;
+
+ default:
+ break;
+ }
+ if (!ret) {
+ ret = FreehandBase::root_handler(event);
+ }
+
+ return ret;
+}
+
+bool PencilTool::_handleButtonPress(GdkEventButton const &bevent) {
+ bool ret = false;
+ if ( bevent.button == 1 && !this->space_panning) {
+ Inkscape::Selection *selection = desktop->getSelection();
+
+ if (Inkscape::have_viable_layer(desktop, defaultMessageContext()) == false) {
+ return true;
+ }
+
+ if (!this->grab) {
+ /* Grab mouse, so release will not pass unnoticed */
+ this->grab = SP_CANVAS_ITEM(desktop->acetate);
+ sp_canvas_item_grab(this->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK |
+ GDK_BUTTON_RELEASE_MASK |
+ GDK_POINTER_MOTION_MASK ),
+ nullptr, bevent.time);
+ }
+
+ Geom::Point const button_w(bevent.x, bevent.y);
+
+ /* Find desktop coordinates */
+ Geom::Point p = this->desktop->w2d(button_w);
+
+ /* Test whether we hit any anchor. */
+ SPDrawAnchor *anchor = spdc_test_inside(this, button_w);
+ if (tablet_enabled) {
+ anchor = nullptr;
+ }
+ pencil_drag_origin_w = Geom::Point(bevent.x,bevent.y);
+ pencil_within_tolerance = true;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ tablet_enabled = prefs->getBool("/tools/freehand/pencil/pressure", false);
+ switch (this->_state) {
+ case SP_PENCIL_CONTEXT_ADDLINE:
+ /* Current segment will be finished with release */
+ ret = true;
+ break;
+ default:
+ /* Set first point of sequence */
+ SnapManager &m = desktop->namedview->snap_manager;
+ if (bevent.state & GDK_CONTROL_MASK) {
+ m.setup(desktop, true);
+ if (!(bevent.state & GDK_SHIFT_MASK)) {
+ m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ }
+ spdc_create_single_dot(this, p, "/tools/freehand/pencil", bevent.state);
+ m.unSetup();
+ ret = true;
+ break;
+ }
+ if (anchor) {
+ p = anchor->dp;
+ //Put the start overwrite curve always on the same direction
+ if (anchor->start) {
+ this->sa_overwrited = anchor->curve->create_reverse();
+ } else {
+ this->sa_overwrited = anchor->curve->copy();
+ }
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
+ } else {
+ m.setup(desktop, true);
+ if (tablet_enabled) {
+ // 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)
+ selection->clear();
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
+ } else if (!(bevent.state & GDK_SHIFT_MASK)) {
+ // 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)
+ selection->clear();
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
+ m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ } else if (selection->singleItem() && SP_IS_PATH(selection->singleItem())) {
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Appending to selected path"));
+ m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_NODE_HANDLE);
+ }
+ m.unSetup();
+ }
+ if (!tablet_enabled) {
+ this->sa = anchor;
+ }
+ this->_setStartpoint(p);
+ ret = true;
+ break;
+ }
+
+ set_high_motion_precision();
+ this->_is_drawing = true;
+ }
+ return ret;
+}
+
+bool PencilTool::_handleMotionNotify(GdkEventMotion const &mevent) {
+ if ((mevent.state & GDK_CONTROL_MASK) && (mevent.state & GDK_BUTTON1_MASK)) {
+ // mouse was accidentally moved during Ctrl+click;
+ // ignore the motion and create a single point
+ this->_is_drawing = false;
+ return true;
+ }
+ bool ret = false;
+
+ if (this->space_panning || (mevent.state & GDK_BUTTON2_MASK) || (mevent.state & GDK_BUTTON3_MASK)) {
+ // allow scrolling
+ return ret;
+ }
+
+ /* Test whether we hit any anchor. */
+ SPDrawAnchor *anchor = spdc_test_inside(this, pencil_drag_origin_w);
+ if (this->pressure == 0.0 && tablet_enabled && !anchor) {
+ // tablet event was accidentally fired without press;
+ return ret;
+ }
+
+ if ( ( mevent.state & GDK_BUTTON1_MASK ) && !this->grab && this->_is_drawing) {
+ /* Grab mouse, so release will not pass unnoticed */
+ this->grab = SP_CANVAS_ITEM(desktop->acetate);
+ sp_canvas_item_grab(this->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK |
+ GDK_BUTTON_RELEASE_MASK |
+ GDK_POINTER_MOTION_MASK ),
+ nullptr, mevent.time);
+ }
+
+ /* Find desktop coordinates */
+ Geom::Point p = desktop->w2d(Geom::Point(mevent.x, mevent.y));
+
+
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if (pencil_within_tolerance) {
+ gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+ if ( Geom::LInfty( Geom::Point(mevent.x,mevent.y) - pencil_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)
+ pencil_within_tolerance = false;
+
+ anchor = spdc_test_inside(this, Geom::Point(mevent.x,mevent.y));
+
+ switch (this->_state) {
+ case SP_PENCIL_CONTEXT_ADDLINE:
+ if (is_tablet) {
+ this->_state = SP_PENCIL_CONTEXT_FREEHAND;
+ return false;
+ }
+ /* Set red endpoint */
+ if (anchor) {
+ p = anchor->dp;
+ } else {
+ Geom::Point ptnr(p);
+ this->_endpointSnap(ptnr, mevent.state);
+ p = ptnr;
+ }
+ this->_setEndpoint(p);
+ ret = true;
+ break;
+ default:
+ /* We may be idle or already freehand */
+ if ( (mevent.state & GDK_BUTTON1_MASK) && this->_is_drawing ) {
+ if (this->_state == SP_PENCIL_CONTEXT_IDLE) {
+ sp_event_context_discard_delayed_snap_event(this);
+ }
+ this->_state = SP_PENCIL_CONTEXT_FREEHAND;
+
+ if ( !this->sa && !this->green_anchor ) {
+ /* Create green anchor */
+ this->green_anchor = sp_draw_anchor_new(this, this->green_curve, TRUE, this->p[0]);
+ }
+ if (anchor) {
+ p = anchor->dp;
+ }
+ if ( this->_npoints != 0) { // buttonpress may have happened before we entered draw context!
+ if (this->ps.empty()) {
+ // Only in freehand mode we have to add the first point also to this->ps (apparently)
+ // - We cannot add this point in spdc_set_startpoint, because we only need it for freehand
+ // - We cannot do this in the button press handler because at that point we don't know yet
+ // whether we're going into freehand mode or not
+ this->ps.push_back(this->p[0]);
+ if (tablet_enabled) {
+ this->_wps.emplace_back(0, 0);
+ }
+ }
+ this->_addFreehandPoint(p, mevent.state, false);
+ ret = true;
+ }
+ if (anchor && !this->anchor_statusbar) {
+ this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Release</b> here to close and finish the path."));
+ this->anchor_statusbar = true;
+ this->ea = anchor;
+ } else if (!anchor && this->anchor_statusbar) {
+ this->message_context->clear();
+ this->anchor_statusbar = false;
+ this->ea = nullptr;
+ } else if (!anchor) {
+ this->message_context->set(Inkscape::NORMAL_MESSAGE, _("Drawing a freehand path"));
+ this->ea = nullptr;
+ }
+
+ } else {
+ if (anchor && !this->anchor_statusbar) {
+ this->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Drag</b> to continue the path from this point."));
+ this->anchor_statusbar = true;
+ } else if (!anchor && this->anchor_statusbar) {
+ this->message_context->clear();
+ this->anchor_statusbar = false;
+ }
+ }
+
+ // Show the pre-snap indicator to communicate to the user where we would snap to if he/she were to
+ // a) press the mousebutton to start a freehand drawing, or
+ // b) release the mousebutton to finish a freehand drawing
+ if (!tablet_enabled && !this->sp_event_context_knot_mouseover()) {
+ SnapManager &m = desktop->namedview->snap_manager;
+ m.setup(desktop, true);
+ m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
+ m.unSetup();
+ }
+ break;
+ }
+ return ret;
+}
+
+bool PencilTool::_handleButtonRelease(GdkEventButton const &revent) {
+ bool ret = false;
+
+ set_high_motion_precision(false);
+
+ if ( revent.button == 1 && this->_is_drawing && !this->space_panning) {
+ this->_is_drawing = false;
+
+ /* Find desktop coordinates */
+ Geom::Point p = desktop->w2d(Geom::Point(revent.x, revent.y));
+
+ /* Test whether we hit any anchor. */
+ SPDrawAnchor *anchor = spdc_test_inside(this, Geom::Point(revent.x, revent.y));
+
+ switch (this->_state) {
+ case SP_PENCIL_CONTEXT_IDLE:
+ /* Releasing button in idle mode means single click */
+ /* We have already set up start point/anchor in button_press */
+ if (!(revent.state & GDK_CONTROL_MASK) && !is_tablet) {
+ // Ctrl+click creates a single point so only set context in ADDLINE mode when Ctrl isn't pressed
+ this->_state = SP_PENCIL_CONTEXT_ADDLINE;
+ }
+ /*Or select the down item if we are in tablet mode*/
+ if (is_tablet) {
+ using namespace Inkscape::LivePathEffect;
+ SPItem * item = sp_event_context_find_item (desktop, Geom::Point(revent.x, revent.y), FALSE, FALSE);
+ if (item && (!this->white_item || item != white_item)) {
+ Effect* lpe = SP_LPE_ITEM(item)->getCurrentLPE();
+ if (lpe) {
+ LPEPowerStroke* ps = static_cast<LPEPowerStroke*>(lpe);
+ if (ps) {
+ desktop->selection->clear();
+ desktop->selection->add(item);
+ }
+ }
+ }
+ }
+ break;
+ case SP_PENCIL_CONTEXT_ADDLINE:
+ /* Finish segment now */
+ if (anchor) {
+ p = anchor->dp;
+ } else {
+ this->_endpointSnap(p, revent.state);
+ }
+ this->ea = anchor;
+ this->_setEndpoint(p);
+ this->_finishEndpoint();
+ this->_state = SP_PENCIL_CONTEXT_IDLE;
+ sp_event_context_discard_delayed_snap_event(this);
+ break;
+ case SP_PENCIL_CONTEXT_FREEHAND:
+ if (revent.state & GDK_MOD1_MASK && !tablet_enabled) {
+ /* sketch mode: interpolate the sketched path and improve the current output path with the new interpolation. don't finish sketch */
+ this->_sketchInterpolate();
+
+ if (this->green_anchor) {
+ this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
+ }
+
+ this->_state = SP_PENCIL_CONTEXT_SKETCH;
+ } else {
+ /* Finish segment now */
+ /// \todo fixme: Clean up what follows (Lauris)
+ if (anchor) {
+ p = anchor->dp;
+ } else {
+ Geom::Point p_end = p;
+ if (tablet_enabled) {
+ this->_addFreehandPoint(p_end, revent.state, true);
+ this->_pressure_curve->reset();
+ } else {
+ this->_endpointSnap(p_end, revent.state);
+ if (p_end != p) {
+ // then we must have snapped!
+ this->_addFreehandPoint(p_end, revent.state, true);
+ }
+ }
+ }
+
+ this->ea = anchor;
+ /* Write curves to object */
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing freehand"));
+ this->_interpolate();
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if (tablet_enabled) {
+ gint shapetype = prefs->getInt("/tools/freehand/pencil/shape", 0);
+ gint simplify = prefs->getInt("/tools/freehand/pencil/simplify", 0);
+ gint mode = prefs->getInt("/tools/freehand/pencil/freehand-mode", 0);
+ prefs->setInt("/tools/freehand/pencil/shape", 0);
+ prefs->setInt("/tools/freehand/pencil/simplify", 0);
+ prefs->setInt("/tools/freehand/pencil/freehand-mode", 0);
+ spdc_concat_colors_and_flush(this, FALSE);
+ prefs->setInt("/tools/freehand/pencil/freehand-mode", mode);
+ prefs->setInt("/tools/freehand/pencil/simplify", simplify);
+ prefs->setInt("/tools/freehand/pencil/shape", shapetype);
+ } else {
+ spdc_concat_colors_and_flush(this, FALSE);
+ }
+ this->points.clear();
+ this->sa = nullptr;
+ this->ea = nullptr;
+ this->ps.clear();
+ this->_wps.clear();
+ if (this->green_anchor) {
+ this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
+ }
+ this->_state = SP_PENCIL_CONTEXT_IDLE;
+ // reset sketch mode too
+ this->sketch_n = 0;
+ }
+ break;
+ case SP_PENCIL_CONTEXT_SKETCH:
+ default:
+ break;
+ }
+
+ if (this->grab) {
+ /* Release grab now */
+ sp_canvas_item_ungrab(this->grab);
+ this->grab = nullptr;
+ }
+
+ ret = true;
+ }
+ return ret;
+}
+
+void PencilTool::_cancel() {
+ if (this->grab) {
+ /* Release grab now */
+ sp_canvas_item_ungrab(this->grab);
+ this->grab = nullptr;
+ }
+
+ this->_is_drawing = false;
+ this->_state = SP_PENCIL_CONTEXT_IDLE;
+ sp_event_context_discard_delayed_snap_event(this);
+
+ this->red_curve->reset();
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), nullptr);
+ for (auto i:this->green_bpaths) {
+ sp_canvas_item_destroy(i);
+ }
+ this->green_bpaths.clear();
+ this->green_curve->reset();
+ if (this->green_anchor) {
+ this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
+ }
+
+ this->message_context->clear();
+ this->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
+
+ this->desktop->canvas->endForcedFullRedraws();
+}
+
+bool PencilTool::_handleKeyPress(GdkEventKey const &event) {
+ bool ret = false;
+
+ switch (get_latin_keyval(&event)) {
+ case GDK_KEY_Up:
+ case GDK_KEY_Down:
+ case GDK_KEY_KP_Up:
+ case GDK_KEY_KP_Down:
+ // Prevent the zoom field from activation.
+ if (!Inkscape::UI::held_only_control(event)) {
+ ret = true;
+ }
+ break;
+ case GDK_KEY_Escape:
+ if (this->_npoints != 0) {
+ // if drawing, cancel, otherwise pass it up for deselecting
+ if (this->_state != SP_PENCIL_CONTEXT_IDLE) {
+ this->_cancel();
+ ret = true;
+ }
+ }
+ break;
+ case GDK_KEY_z:
+ case GDK_KEY_Z:
+ if (Inkscape::UI::held_only_control(event) && this->_npoints != 0) {
+ // if drawing, cancel, otherwise pass it up for undo
+ if (this->_state != SP_PENCIL_CONTEXT_IDLE) {
+ this->_cancel();
+ ret = true;
+ }
+ }
+ break;
+ case GDK_KEY_g:
+ case GDK_KEY_G:
+ if (Inkscape::UI::held_only_shift(event)) {
+ this->desktop->selection->toGuides();
+ ret = true;
+ }
+ break;
+ case GDK_KEY_Alt_L:
+ case GDK_KEY_Alt_R:
+ case GDK_KEY_Meta_L:
+ case GDK_KEY_Meta_R:
+ if (this->_state == SP_PENCIL_CONTEXT_IDLE) {
+ this->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("<b>Sketch mode</b>: holding <b>Alt</b> interpolates between sketched paths. Release <b>Alt</b> to finalize."));
+ }
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+bool PencilTool::_handleKeyRelease(GdkEventKey const &event) {
+ bool ret = false;
+
+ switch (get_latin_keyval(&event)) {
+ case GDK_KEY_Alt_L:
+ case GDK_KEY_Alt_R:
+ case GDK_KEY_Meta_L:
+ case GDK_KEY_Meta_R:
+ if (this->_state == SP_PENCIL_CONTEXT_SKETCH) {
+ spdc_concat_colors_and_flush(this, FALSE);
+ this->sketch_n = 0;
+ this->sa = nullptr;
+ this->ea = nullptr;
+ if (this->green_anchor) {
+ this->green_anchor = sp_draw_anchor_destroy(this->green_anchor);
+ }
+ this->_state = SP_PENCIL_CONTEXT_IDLE;
+ sp_event_context_discard_delayed_snap_event(this);
+ this->desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing freehand sketch"));
+ ret = true;
+ }
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+/**
+ * Reset points and set new starting point.
+ */
+void PencilTool::_setStartpoint(Geom::Point const &p) {
+ this->_npoints = 0;
+ this->red_curve_is_valid = false;
+ if (in_svg_plane(p)) {
+ this->p[this->_npoints++] = p;
+ }
+}
+
+/**
+ * Change moving endpoint position.
+ * <ul>
+ * <li>Ctrl constrains to moving to H/V direction, snapping in given direction.
+ * <li>Otherwise we snap freely to whatever attractors are available.
+ * </ul>
+ *
+ * Number of points is (re)set to 2 always, 2nd point is modified.
+ * We change RED curve.
+ */
+void PencilTool::_setEndpoint(Geom::Point const &p) {
+ if (this->_npoints == 0) {
+ return;
+ /* May occur if first point wasn't in SVG plane (e.g. weird w2d transform, perhaps from bad
+ * zoom setting).
+ */
+ }
+ g_return_if_fail( this->_npoints > 0 );
+
+ this->red_curve->reset();
+ if ( ( p == this->p[0] )
+ || !in_svg_plane(p) )
+ {
+ this->_npoints = 1;
+ } else {
+ this->p[1] = p;
+ this->_npoints = 2;
+
+ this->red_curve->moveto(this->p[0]);
+ this->red_curve->lineto(this->p[1]);
+ this->red_curve_is_valid = true;
+ if (!tablet_enabled) {
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->red_curve);
+ }
+ }
+}
+
+/**
+ * Finalize addline.
+ *
+ * \todo
+ * fixme: I'd like remove red reset from concat colors (lauris).
+ * Still not sure, how it will make most sense.
+ */
+void PencilTool::_finishEndpoint() {
+ if (this->red_curve->is_unset() ||
+ this->red_curve->first_point() == this->red_curve->second_point())
+ {
+ this->red_curve->reset();
+ if (!tablet_enabled) {
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), nullptr);
+ }
+ } else {
+ /* Write curves to object. */
+ spdc_concat_colors_and_flush(this, FALSE);
+ this->sa = nullptr;
+ this->ea = nullptr;
+ }
+}
+
+static inline double square(double const x) { return x * x; }
+
+
+
+void PencilTool::addPowerStrokePencil()
+{
+ if (this->_curve) {
+ SPDocument *document = SP_ACTIVE_DOCUMENT;
+ if (!document) {
+ return;
+ }
+ using namespace Inkscape::LivePathEffect;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ double tol = prefs->getDoubleLimited("/tools/freehand/pencil/base-simplify", 25.0, 0.0, 100.0) * 0.4;
+ double tolerance_sq = 0.02 * square(this->desktop->w2d().descrim() * tol) * exp(0.2 * tol - 2);
+ int n_points = this->ps.size();
+ // worst case gives us a segment per point
+ int max_segs = 4 * n_points;
+ std::vector<Geom::Point> b(max_segs);
+ SPCurve *curvepressure = new SPCurve();
+ int const n_segs = Geom::bezier_fit_cubic_r(b.data(), this->ps.data(), n_points, tolerance_sq, max_segs);
+ if (n_segs > 0) {
+ /* Fit and draw and reset state */
+ curvepressure->moveto(b[0]);
+ for (int c = 0; c < n_segs; c++) {
+ curvepressure->curveto(b[4 * c + 1], b[4 * c + 2], b[4 * c + 3]);
+ }
+ }
+ Geom::Affine transform_coordinate = SP_ITEM(SP_ACTIVE_DESKTOP->currentLayer())->i2dt_affine().inverse();
+ curvepressure->transform(transform_coordinate);
+ Geom::Path path = curvepressure->get_pathvector()[0];
+ if (!path.empty()) {
+ Inkscape::XML::Document *xml_doc = document->getReprDoc();
+ Inkscape::XML::Node *pp = nullptr;
+ pp = xml_doc->createElement("svg:path");
+ gchar *pvector_str = sp_svg_write_path(path);
+ if (pvector_str) {
+ pp->setAttribute("d", pvector_str);
+ g_free(pvector_str);
+ }
+ pp->setAttribute("id", "power_stroke_preview");
+ Inkscape::GC::release(pp);
+
+ SPShape *powerpreview = SP_SHAPE(SP_ITEM(SP_ACTIVE_DESKTOP->currentLayer())->appendChildRepr(pp));
+ SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(powerpreview);
+ if (!lpeitem) {
+ return;
+ }
+ Inkscape::DocumentUndo::ScopedInsensitive no_undo(document);
+ tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 0.0, 100.0) + 30;
+ if (tol > 30) {
+ tol = tol / (130.0 * (132.0 - tol));
+ Inkscape::SVGOStringStream threshold;
+ threshold << tol;
+ Effect::createAndApply(SIMPLIFY, desktop->doc(), SP_ITEM(lpeitem));
+ Effect *lpe = lpeitem->getCurrentLPE();
+ Inkscape::LivePathEffect::LPESimplify *simplify =
+ static_cast<Inkscape::LivePathEffect::LPESimplify *>(lpe);
+ if (simplify) {
+ sp_lpe_item_enable_path_effects(lpeitem, false);
+ Glib::ustring pref_path = "/live_effects/simplify/smooth_angles";
+ bool valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ lpe->getRepr()->setAttribute("smooth_angles", "0");
+ }
+ pref_path = "/live_effects/simplify/helper_size";
+ valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ lpe->getRepr()->setAttribute("helper_size", "0");
+ }
+ pref_path = "/live_effects/simplify/step";
+ valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ lpe->getRepr()->setAttribute("step", "1");
+ }
+ lpe->getRepr()->setAttribute("threshold", threshold.str());
+ lpe->getRepr()->setAttribute("simplify_individual_paths", "false");
+ lpe->getRepr()->setAttribute("simplify_just_coalesce", "false");
+ sp_lpe_item_enable_path_effects(lpeitem, true);
+ }
+ sp_lpe_item_update_patheffect(lpeitem, false, true);
+ curvepressure = powerpreview->getCurve();
+ if (curvepressure->is_empty()) {
+ return;
+ }
+ path = curvepressure->get_pathvector()[0];
+ }
+ powerStrokeInterpolate(path);
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ Glib::ustring pref_path_pp = "/live_effects/powerstroke/powerpencil";
+ prefs->setBool(pref_path_pp, true);
+ Effect::createAndApply(POWERSTROKE, SP_ACTIVE_DESKTOP->doc(), lpeitem);
+ Effect *lpe = lpeitem->getCurrentLPE();
+ Inkscape::LivePathEffect::LPEPowerStroke *pspreview = static_cast<LPEPowerStroke *>(lpe);
+ if (pspreview) {
+ sp_lpe_item_enable_path_effects(lpeitem, false);
+ Glib::ustring pref_path = "/live_effects/powerstroke/interpolator_type";
+ bool valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ pspreview->getRepr()->setAttribute("interpolator_type", "CentripetalCatmullRom");
+ }
+ pref_path = "/live_effects/powerstroke/linejoin_type";
+ valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ pspreview->getRepr()->setAttribute("linejoin_type", "spiro");
+ }
+ pref_path = "/live_effects/powerstroke/interpolator_beta";
+ valid = prefs->getEntry(pref_path).isValid();
+ if (!valid) {
+ pspreview->getRepr()->setAttribute("interpolator_beta", "0.75");
+ }
+ gint cap = prefs->getInt("/live_effects/powerstroke/powerpencilcap", 2);
+ pspreview->getRepr()->setAttribute("start_linecap_type", LineCapTypeConverter.get_key(cap));
+ pspreview->getRepr()->setAttribute("end_linecap_type", LineCapTypeConverter.get_key(cap));
+ pspreview->getRepr()->setAttribute("sort_points", "true");
+ if (!this->points.size()) {
+ Geom::Point default_point((path.size()/2.0), 0.5);
+ this->points.push_back(default_point);
+ }
+ pspreview->offset_points.param_set_and_write_new_value(this->points);
+ sp_lpe_item_enable_path_effects(lpeitem, true);
+ sp_lpe_item_update_patheffect(lpeitem, false, true);
+ pp->setAttribute("style", "fill:#888888;opacity:1;fill-rule:nonzero;stroke:none;");
+ }
+ if (curvepressure) {
+ curvepressure->unref();
+ }
+ prefs->setBool(pref_path_pp, false);
+ }
+ }
+}
+
+/**
+ * Add a virtual point to the future pencil path.
+ *
+ * @param p the point to add.
+ * @param state event state
+ * @param last the point is the last of the user stroke.
+ */
+void PencilTool::_addFreehandPoint(Geom::Point const &p, guint /*state*/, bool last)
+{
+ g_assert( this->_npoints > 0 );
+ g_return_if_fail(unsigned(this->_npoints) < G_N_ELEMENTS(this->p));
+
+ double distance = 0;
+ if ( ( p != this->p[ this->_npoints - 1 ] )
+ && in_svg_plane(p) )
+ {
+ this->p[this->_npoints++] = p;
+ this->_fitAndSplit();
+ if (tablet_enabled) {
+ distance = Geom::distance(p, this->ps.back()) + this->_wps.back()[Geom::X];
+ }
+ this->ps.push_back(p);
+ }
+ if (tablet_enabled && in_svg_plane(p)) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ double min = prefs->getIntLimited("/tools/freehand/pencil/minpressure", 0, 0, 100) / 100.0;
+ double max = prefs->getIntLimited("/tools/freehand/pencil/maxpressure", 30, 0, 100) / 100.0;
+ if (min > max) {
+ min = max;
+ }
+ double dezoomify_factor = 0.05 * 1000 / SP_EVENT_CONTEXT(this)->desktop->current_zoom();
+ double pressure_shrunk = (((this->pressure - 0.25) * 1.25) * (max - min)) + min;
+ double pressure_computed = pressure_shrunk * dezoomify_factor;
+ double pressure_computed_scaled = std::abs(pressure_computed * SP_ACTIVE_DOCUMENT->getDocumentScale().inverse()[Geom::X]);
+ if (p != this->p[this->_npoints - 1]) {
+ this->_wps.emplace_back(distance, pressure_computed_scaled);
+ }
+ pressure_computed = std::abs(pressure_computed);
+ if (pressure_computed) {
+ Geom::Circle pressure_dot(p, pressure_computed);
+ Geom::Piecewise<Geom::D2<Geom::SBasis>> pressure_piecewise;
+ pressure_piecewise.push_cut(0);
+ pressure_piecewise.push(pressure_dot.toSBasis(), 1);
+ Geom::PathVector pressure_path = Geom::path_from_piecewise(pressure_piecewise, 0.1);
+ Geom::PathVector previous_presure = this->_pressure_curve->get_pathvector();
+ if (!pressure_path.empty() && !previous_presure.empty()) {
+ pressure_path = sp_pathvector_boolop(pressure_path, previous_presure, bool_op_union, fill_nonZero, fill_nonZero);
+ }
+ this->_pressure_curve->set_pathvector(pressure_path);
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->_pressure_curve);
+ }
+ if (last) {
+ this->addPowerStrokePencil();
+ }
+ }
+}
+
+void PencilTool::powerStrokeInterpolate(Geom::Path const path)
+{
+ size_t ps_size = this->ps.size();
+ if ( ps_size <= 1 ) {
+ return;
+ }
+
+ using Geom::X;
+ using Geom::Y;
+ gint path_size = path.size();
+ std::vector<Geom::Point> tmp_points;
+ Geom::Point previous = Geom::Point(Geom::infinity(), 0);
+ bool increase = false;
+ size_t i = 0;
+ double dezoomify_factor = 0.05 * 1000 / SP_EVENT_CONTEXT(this)->desktop->current_zoom();
+ double limit = 6 * dezoomify_factor;
+ double max =
+ std::max(this->_wps.back()[Geom::X] - (this->_wps.back()[Geom::X] / 10), this->_wps.back()[Geom::X] - limit);
+ double min = std::min(this->_wps.back()[Geom::X] / 10, limit);
+ double original_lenght = this->_wps.back()[Geom::X];
+ double max10 = 0;
+ double min10 = 0;
+ for (auto wps : this->_wps) {
+ i++;
+ Geom::Coord pressure = wps[Geom::Y];
+ max10 = max10 > pressure ? max10 : pressure;
+ min10 = min10 <= pressure ? min10 : pressure;
+
+ if (!original_lenght || wps[Geom::X] > max) {
+ break;
+ }
+ if (wps[Geom::Y] == 0 || wps[Geom::X] < min) {
+ continue;
+ }
+ if (previous[Geom::Y] < (max10 + min10) / 2.0) {
+ if (increase && tmp_points.size() > 1) {
+ tmp_points.pop_back();
+ }
+ wps[Geom::Y] = max10;
+ tmp_points.push_back(wps);
+ increase = true;
+ } else {
+ if (!increase && tmp_points.size() > 1) {
+ tmp_points.pop_back();
+ }
+ wps[Geom::Y] = min10;
+ tmp_points.push_back(wps);
+ increase = false;
+ }
+ previous = wps;
+ max10 = 0;
+ min10 = 999999999;
+ }
+ this->points.clear();
+ double prev_pressure = 0;
+ for (auto point : tmp_points) {
+ point[Geom::X] /= (double)original_lenght;
+ point[Geom::X] *= path_size;
+ if (std::abs(point[Geom::Y] - prev_pressure) > point[Geom::Y] / 10.0) {
+ this->points.push_back(point);
+ prev_pressure = point[Geom::Y];
+ }
+ }
+ tmp_points.clear();
+}
+
+void PencilTool::_interpolate() {
+ size_t ps_size = this->ps.size();
+ if ( ps_size <= 1 ) {
+ return;
+ }
+ using Geom::X;
+ using Geom::Y;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ double tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 1.0, 100.0) * 0.4;
+ bool simplify = prefs->getInt("/tools/freehand/pencil/simplify", 0);
+ if(simplify){
+ double tol2 = prefs->getDoubleLimited("/tools/freehand/pencil/base-simplify", 25.0, 0.0, 100.0) * 0.4;
+ tol = std::min(tol,tol2);
+ }
+ this->green_curve->reset();
+ this->red_curve->reset();
+ this->red_curve_is_valid = false;
+ double tolerance_sq = square(this->desktop->w2d().descrim() * tol) * exp(0.2 * tol - 2);
+
+ g_assert(is_zero(this->_req_tangent) || is_unit_vector(this->_req_tangent));
+
+ int n_points = this->ps.size();
+
+ // worst case gives us a segment per point
+ int max_segs = 4 * n_points;
+
+ std::vector<Geom::Point> b(max_segs);
+ int const n_segs = Geom::bezier_fit_cubic_r(b.data(), this->ps.data(), n_points, tolerance_sq, max_segs);
+ if (n_segs > 0) {
+ /* Fit and draw and reset state */
+ this->green_curve->moveto(b[0]);
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ guint mode = prefs->getInt("/tools/freehand/pencil/freehand-mode", 0);
+ for (int c = 0; c < n_segs; c++) {
+ // if we are in BSpline we modify the trace to create adhoc nodes
+ if (mode == 2) {
+ Geom::Point point_at1 = b[4 * c + 0] + (1./3) * (b[4 * c + 3] - b[4 * c + 0]);
+ point_at1 = Geom::Point(point_at1[X] + HANDLE_CUBIC_GAP, point_at1[Y] + HANDLE_CUBIC_GAP);
+ Geom::Point point_at2 = b[4 * c + 3] + (1./3) * (b[4 * c + 0] - b[4 * c + 3]);
+ point_at2 = Geom::Point(point_at2[X] + HANDLE_CUBIC_GAP, point_at2[Y] + HANDLE_CUBIC_GAP);
+ this->green_curve->curveto(point_at1,point_at2,b[4*c+3]);
+ } else {
+ if (!tablet_enabled || c != n_segs - 1) {
+ this->green_curve->curveto(b[4 * c + 1], b[4 * c + 2], b[4 * c + 3]);
+ } else {
+ boost::optional<Geom::Point> finalp = this->green_curve->last_point();
+ if (this->green_curve->nodes_in_path() > 4 && Geom::are_near(*finalp, b[4 * c + 3], 10.0)) {
+ this->green_curve->backspace();
+ this->green_curve->curveto(*finalp, b[4 * c + 3], b[4 * c + 3]);
+ } else {
+ this->green_curve->curveto(b[4 * c + 1], b[4 * c + 3], b[4 * c + 3]);
+ }
+ }
+ }
+ }
+ if (!tablet_enabled) {
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->green_curve);
+ }
+ /* Fit and draw and copy last point */
+ g_assert(!this->green_curve->is_empty());
+ /* Set up direction of next curve. */
+ {
+ Geom::Curve const * last_seg = this->green_curve->last_segment();
+ g_assert( last_seg ); // Relevance: validity of (*last_seg)
+ this->p[0] = last_seg->finalPoint();
+ this->_npoints = 1;
+ Geom::Curve *last_seg_reverse = last_seg->reverse();
+ Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
+ delete last_seg_reverse;
+ this->_req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
+ ? Geom::Point(0, 0)
+ : Geom::unit_vector(req_vec) );
+ }
+ }
+}
+
+
+/* interpolates the sketched curve and tweaks the current sketch interpolation*/
+void PencilTool::_sketchInterpolate() {
+ if ( this->ps.size() <= 1 ) {
+ return;
+ }
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ double tol = prefs->getDoubleLimited("/tools/freehand/pencil/tolerance", 10.0, 1.0, 100.0) * 0.4;
+ bool simplify = prefs->getInt("/tools/freehand/pencil/simplify", 0);
+ if(simplify){
+ double tol2 = prefs->getDoubleLimited("/tools/freehand/pencil/base-simplify", 25.0, 1.0, 100.0) * 0.4;
+ tol = std::min(tol,tol2);
+ }
+ double tolerance_sq = 0.02 * square(this->desktop->w2d().descrim() * tol) * exp(0.2 * tol - 2);
+
+ bool average_all_sketches = prefs->getBool("/tools/freehand/pencil/average_all_sketches", true);
+
+ g_assert(is_zero(this->_req_tangent) || is_unit_vector(this->_req_tangent));
+
+ this->red_curve->reset();
+ this->red_curve_is_valid = false;
+
+ int n_points = this->ps.size();
+
+ // worst case gives us a segment per point
+ int max_segs = 4 * n_points;
+
+ std::vector<Geom::Point> b(max_segs);
+
+ int const n_segs = Geom::bezier_fit_cubic_r(b.data(), this->ps.data(), n_points, tolerance_sq, max_segs);
+
+ if (n_segs > 0) {
+ Geom::Path fit(b[0]);
+
+ for (int c = 0; c < n_segs; c++) {
+ fit.appendNew<Geom::CubicBezier>(b[4 * c + 1], b[4 * c + 2], b[4 * c + 3]);
+ }
+
+ Geom::Piecewise<Geom::D2<Geom::SBasis> > fit_pwd2 = fit.toPwSb();
+
+ if (this->sketch_n > 0) {
+ double t;
+
+ if (average_all_sketches) {
+ // Average = (sum of all) / n
+ // = (sum of all + new one) / n+1
+ // = ((old average)*n + new one) / n+1
+ t = this->sketch_n / (this->sketch_n + 1.);
+ } else {
+ t = 0.5;
+ }
+
+ this->sketch_interpolation = Geom::lerp(t, fit_pwd2, this->sketch_interpolation);
+
+ // simplify path, to eliminate small segments
+ Path path;
+ path.LoadPathVector(Geom::path_from_piecewise(this->sketch_interpolation, 0.01));
+ path.Simplify(0.5);
+
+ Geom::PathVector *pathv = path.MakePathVector();
+ this->sketch_interpolation = (*pathv)[0].toPwSb();
+ delete pathv;
+ } else {
+ this->sketch_interpolation = fit_pwd2;
+ }
+
+ this->sketch_n++;
+
+ this->green_curve->reset();
+ this->green_curve->set_pathvector(Geom::path_from_piecewise(this->sketch_interpolation, 0.01));
+ if (!tablet_enabled) {
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->green_curve);
+ }
+ /* Fit and draw and copy last point */
+ g_assert(!this->green_curve->is_empty());
+
+ /* Set up direction of next curve. */
+ {
+ Geom::Curve const * last_seg = this->green_curve->last_segment();
+ g_assert( last_seg ); // Relevance: validity of (*last_seg)
+ this->p[0] = last_seg->finalPoint();
+ this->_npoints = 1;
+ Geom::Curve *last_seg_reverse = last_seg->reverse();
+ Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
+ delete last_seg_reverse;
+ this->_req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
+ ? Geom::Point(0, 0)
+ : Geom::unit_vector(req_vec) );
+ }
+ }
+
+ this->ps.clear();
+ this->points.clear();
+ this->_wps.clear();
+}
+
+void PencilTool::_fitAndSplit() {
+ g_assert( this->_npoints > 1 );
+
+ double const tolerance_sq = 0;
+
+ Geom::Point b[4];
+ g_assert(is_zero(this->_req_tangent)
+ || is_unit_vector(this->_req_tangent));
+ Geom::Point const tHatEnd(0, 0);
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ int const n_segs = Geom::bezier_fit_cubic_full(b, nullptr, this->p, this->_npoints,
+ this->_req_tangent, tHatEnd,
+ tolerance_sq, 1);
+ if ( n_segs > 0
+ && unsigned(this->_npoints) < G_N_ELEMENTS(this->p) )
+ {
+ /* Fit and draw and reset state */
+
+ this->red_curve->reset();
+ this->red_curve->moveto(b[0]);
+ using Geom::X;
+ using Geom::Y;
+ // if we are in BSpline we modify the trace to create adhoc nodes
+ guint mode = prefs->getInt("/tools/freehand/pencil/freehand-mode", 0);
+ if(mode == 2){
+ Geom::Point point_at1 = b[0] + (1./3)*(b[3] - b[0]);
+ point_at1 = Geom::Point(point_at1[X] + HANDLE_CUBIC_GAP, point_at1[Y] + HANDLE_CUBIC_GAP);
+ Geom::Point point_at2 = b[3] + (1./3)*(b[0] - b[3]);
+ point_at2 = Geom::Point(point_at2[X] + HANDLE_CUBIC_GAP, point_at2[Y] + HANDLE_CUBIC_GAP);
+ this->red_curve->curveto(point_at1,point_at2,b[3]);
+ }else{
+ this->red_curve->curveto(b[1], b[2], b[3]);
+ }
+ if (!tablet_enabled) {
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(this->red_bpath), this->red_curve);
+ }
+ this->red_curve_is_valid = true;
+ } else {
+ /* Fit and draw and copy last point */
+
+ g_assert(!this->red_curve->is_empty());
+
+ /* Set up direction of next curve. */
+ {
+ Geom::Curve const * last_seg = this->red_curve->last_segment();
+ g_assert( last_seg ); // Relevance: validity of (*last_seg)
+ this->p[0] = last_seg->finalPoint();
+ this->_npoints = 1;
+ Geom::Curve *last_seg_reverse = last_seg->reverse();
+ Geom::Point const req_vec( -last_seg_reverse->unitTangentAt(0) );
+ delete last_seg_reverse;
+ this->_req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
+ ? Geom::Point(0, 0)
+ : Geom::unit_vector(req_vec) );
+ }
+
+
+ this->green_curve->append_continuous(this->red_curve, 0.0625);
+ SPCurve *curve = this->red_curve->copy();
+
+ /// \todo fixme:
+ SPCanvasItem *cshape = sp_canvas_bpath_new(this->desktop->getSketch(), curve, true);
+ curve->unref();
+
+ this->highlight_color = SP_ITEM(this->desktop->currentLayer())->highlight_color();
+ if((unsigned int)prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff) == this->highlight_color){
+ this->green_color = 0x00ff007f;
+ } else {
+ this->green_color = this->highlight_color;
+ }
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), this->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+
+ this->green_bpaths.push_back(cshape);
+
+ this->red_curve_is_valid = false;
+ }
+}
+
+}
+}
+}
+
+/*
+ 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 :