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-rw-r--r--src/ui/tools/pen-tool.cpp2371
1 files changed, 2371 insertions, 0 deletions
diff --git a/src/ui/tools/pen-tool.cpp b/src/ui/tools/pen-tool.cpp
new file mode 100644
index 000000000..32b1b47ef
--- /dev/null
+++ b/src/ui/tools/pen-tool.cpp
@@ -0,0 +1,2371 @@
+ /** \file
+ * Pen event context implementation.
+ */
+
+/*
+ * Authors:
+ * Lauris Kaplinski <lauris@kaplinski.com>
+ * bulia byak <buliabyak@users.sf.net>
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2000 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 2002 Lauris Kaplinski
+ * Copyright (C) 2004 Monash University
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include <gdk/gdkkeysyms.h>
+#include <cstring>
+#include <string>
+
+
+#include "ui/tools/pen-tool.h"
+#include "sp-namedview.h"
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "selection.h"
+#include "selection-chemistry.h"
+#include "draw-anchor.h"
+#include "message-stack.h"
+#include "message-context.h"
+#include "preferences.h"
+#include "sp-path.h"
+#include "display/sp-canvas.h"
+#include "display/curve.h"
+#include "pixmaps/cursor-pen.xpm"
+#include "display/canvas-bpath.h"
+#include "display/sp-ctrlline.h"
+#include "display/sodipodi-ctrl.h"
+#include <glibmm/i18n.h>
+#include "macros.h"
+#include "context-fns.h"
+#include "tools-switch.h"
+#include "ui/control-manager.h"
+//BSpline
+//Incluimos los archivos necesarios para las BSpline y Spiro
+#define INKSCAPE_LPE_SPIRO_C
+#include "live_effects/lpe-spiro.h"
+
+
+#include <typeinfo>
+#include <2geom/pathvector.h>
+#include <2geom/affine.h>
+#include <2geom/bezier-curve.h>
+#include <2geom/hvlinesegment.h>
+#include "helper/geom-nodetype.h"
+#include "helper/geom-curves.h"
+
+// For handling un-continuous paths:
+#include "message-stack.h"
+#include "inkscape.h"
+#include "desktop.h"
+
+#include "live_effects/spiro.h"
+
+
+#define INKSCAPE_LPE_BSPLINE_C
+#include "live_effects/lpe-bspline.h"
+#include <2geom/nearest-point.h>
+//BSpline End
+
+#include "tool-factory.h"
+
+
+using Inkscape::ControlManager;
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+static void spdc_pen_set_initial_point(PenTool *pc, Geom::Point const p);
+/*
+ *BSpline
+ *Added functions
+*/
+//Añade los modos spiro y bspline
+static void sp_pen_context_set_mode(PenTool *const pc, guint mode);
+//Esta función cambia los colores rojo,verde y azul haciendolos transparentes o no en función de si se usa spiro
+static void bspline_spiro_color(PenTool *const pc);
+//Crea un nodo en modo bspline o spiro
+static void bspline_spiro(PenTool *const pc,bool shift);
+//Crea un nodo de modo spiro o bspline
+static void bspline_spiro_on(PenTool *const pc);
+//Crea un nodo de tipo CUSP
+static void bspline_spiro_off(PenTool *const pc);
+//Continua una curva existente en modo bspline o spiro
+static void bspline_spiro_start_anchor(PenTool *const pc,bool shift);
+//Continua una curva exsitente con el nodo de union en modo bspline o spiro
+static void bspline_spiro_start_anchor_on(PenTool *const pc);
+//Continua una curva existente con el nodo de union en modo CUSP
+static void bspline_spiro_start_anchor_off(PenTool *const pc);
+//Modifica la "red_curve" cuando se detecta movimiento
+static void bspline_spiro_motion(PenTool *const pc,bool shift);
+//Cierra la curva con el último nodo en modo bspline o spiro
+static void bspline_spiro_end_anchor_on(PenTool *const pc);
+//Cierra la curva con el último nodo en modo CUSP
+static void bspline_spiro_end_anchor_off(PenTool *const pc);
+//Unimos todas las curvas en juego y llamamos a la función doEffect.
+static void bspline_spiro_build(PenTool *const pc);
+//function bspline cloned from lpe-bspline.cpp
+static void bspline_doEffect(SPCurve * curve);
+//function spiro cloned from lpe-spiro.cpp
+static void spiro_doEffect(SPCurve * curve);
+//BSpline end
+static void spdc_pen_set_subsequent_point(PenTool *const pc, Geom::Point const p, bool statusbar, guint status = 0);
+static void spdc_pen_set_ctrl(PenTool *pc, Geom::Point const p, guint state);
+static void spdc_pen_finish_segment(PenTool *pc, Geom::Point p, guint state);
+
+static void spdc_pen_finish(PenTool *pc, gboolean closed);
+
+static gint pen_handle_button_press(PenTool *const pc, GdkEventButton const &bevent);
+static gint pen_handle_motion_notify(PenTool *const pc, GdkEventMotion const &mevent);
+static gint pen_handle_button_release(PenTool *const pc, GdkEventButton const &revent);
+static gint pen_handle_2button_press(PenTool *const pc, GdkEventButton const &bevent);
+static gint pen_handle_key_press(PenTool *const pc, GdkEvent *event);
+static void spdc_reset_colors(PenTool *pc);
+
+static void pen_disable_events(PenTool *const pc);
+static void pen_enable_events(PenTool *const pc);
+
+static Geom::Point pen_drag_origin_w(0, 0);
+static bool pen_within_tolerance = false;
+
+static int pen_next_paraxial_direction(const PenTool *const pc, Geom::Point const &pt, Geom::Point const &origin, guint state);
+static void pen_set_to_nearest_horiz_vert(const PenTool *const pc, Geom::Point &pt, guint const state, bool snap);
+
+static int pen_last_paraxial_dir = 0; // last used direction in horizontal/vertical mode; 0 = horizontal, 1 = vertical
+
+namespace {
+ ToolBase* createPenContext() {
+ return new PenTool();
+ }
+
+ bool penContextRegistered = ToolFactory::instance().registerObject("/tools/freehand/pen", createPenContext);
+}
+
+const std::string& PenTool::getPrefsPath() {
+ return PenTool::prefsPath;
+}
+
+const std::string PenTool::prefsPath = "/tools/freehand/pen";
+
+PenTool::PenTool() : FreehandBase() {
+ this->polylines_only = false;
+ this->polylines_paraxial = false;
+ this->expecting_clicks_for_LPE = 0;
+
+ this->cursor_shape = cursor_pen_xpm;
+ this->hot_x = 4;
+ this->hot_y = 4;
+
+ this->npoints = 0;
+ this->mode = MODE_CLICK;
+ this->state = POINT;
+
+ this->c0 = NULL;
+ this->c1 = NULL;
+ this->cl0 = NULL;
+ this->cl1 = NULL;
+
+ this->events_disabled = 0;
+
+ this->num_clicks = 0;
+ this->waiting_LPE = NULL;
+ this->waiting_item = NULL;
+}
+
+PenTool::~PenTool() {
+ if (this->c0) {
+ sp_canvas_item_destroy(this->c0);
+ this->c0 = NULL;
+ }
+ if (this->c1) {
+ sp_canvas_item_destroy(this->c1);
+ this->c1 = NULL;
+ }
+ if (this->cl0) {
+ sp_canvas_item_destroy(this->cl0);
+ this->cl0 = NULL;
+ }
+ if (this->cl1) {
+ sp_canvas_item_destroy(this->cl1);
+ this->cl1 = NULL;
+ }
+
+ if (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 sp_pen_context_set_polyline_mode(PenTool *const pc) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ guint mode = prefs->getInt("/tools/freehand/pen/freehand-mode", 0);
+ pc->polylines_only = (mode == 3 || mode == 4);
+ pc->polylines_paraxial = (mode == 4);
+ //BSpline
+ //we call the function which defines the Spiro modes and the BSpline
+ //todo: merge to one function only
+ sp_pen_context_set_mode(pc, mode);
+ //BSpline End
+}
+
+//BSpline
+/*
+*.Set the mode of draw spiro, and bsplines
+*/
+void sp_pen_context_set_mode(PenTool *const pc, guint mode) {
+ pc->spiro = (mode == 1);
+ pc->bspline = (mode == 2);
+}
+//BSpline End
+
+/**
+ * Callback to initialize PenTool object.
+ */
+void PenTool::setup() {
+ FreehandBase::setup();
+
+ ControlManager &mgr = ControlManager::getManager();
+
+ // Pen indicators
+ this->c0 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)), Inkscape::CTRL_TYPE_ADJ_HANDLE);
+ mgr.track(this->c0);
+
+ this->c1 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)), Inkscape::CTRL_TYPE_ADJ_HANDLE);
+ mgr.track(this->c1);
+
+ this->cl0 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)));
+ this->cl1 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(this)));
+
+ sp_canvas_item_hide(this->c0);
+ sp_canvas_item_hide(this->c1);
+ sp_canvas_item_hide(this->cl0);
+ sp_canvas_item_hide(this->cl1);
+
+ sp_event_context_read(this, "mode");
+
+ this->anchor_statusbar = false;
+
+ sp_pen_context_set_polyline_mode(this);
+
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if (prefs->getBool("/tools/freehand/pen/selcue")) {
+ this->enableSelectionCue();
+ }
+}
+
+static void pen_cancel (PenTool *const pc)
+{
+ pc->num_clicks = 0;
+ pc->state = PenTool::STOP;
+ spdc_reset_colors(pc);
+ sp_canvas_item_hide(pc->c0);
+ sp_canvas_item_hide(pc->c1);
+ sp_canvas_item_hide(pc->cl0);
+ sp_canvas_item_hide(pc->cl1);
+ pc->message_context->clear();
+ pc->message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
+
+ pc->desktop->canvas->endForcedFullRedraws();
+}
+
+/**
+ * Finalization callback.
+ */
+void PenTool::finish() {
+ sp_event_context_discard_delayed_snap_event(this);
+
+ if (this->npoints != 0) {
+ pen_cancel(this);
+ }
+
+ FreehandBase::finish();
+}
+
+/**
+ * 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;
+ }
+ }
+}
+
+/**
+ * Snaps new node relative to the previous node.
+ */
+static void spdc_endpoint_snap(PenTool const *const pc, Geom::Point &p, guint const state)
+{
+ if ((state & GDK_CONTROL_MASK) && !pc->polylines_paraxial) { //CTRL enables angular snapping
+ if (pc->npoints > 0) {
+ spdc_endpoint_snap_rotation(pc, p, pc->p[0], 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 ((pc->npoints > 0) && pc->polylines_paraxial) {
+ // snap constrained
+ pen_set_to_nearest_horiz_vert(pc, p, state, true);
+ } else {
+ // snap freely
+ boost::optional<Geom::Point> origin = pc->npoints > 0 ? pc->p[0] : boost::optional<Geom::Point>();
+ spdc_endpoint_snap_free(pc, p, origin, state); // pass the origin, to allow for perpendicular / tangential snapping
+ }
+ }
+}
+
+/**
+ * Snaps new node's handle relative to the new node.
+ */
+static void spdc_endpoint_snap_handle(PenTool const *const pc, Geom::Point &p, guint const state)
+{
+ g_return_if_fail(( pc->npoints == 2 ||
+ pc->npoints == 5 ));
+
+ if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping
+ spdc_endpoint_snap_rotation(pc, p, pc->p[pc->npoints - 2], state);
+ } else {
+ if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above
+ boost::optional<Geom::Point> origin = pc->p[pc->npoints - 2];
+ spdc_endpoint_snap_free(pc, p, origin, state);
+ }
+ }
+}
+
+bool PenTool::item_handler(SPItem* item, GdkEvent* event) {
+ gint ret = FALSE;
+
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ ret = pen_handle_button_press(this, event->button);
+ break;
+ case GDK_BUTTON_RELEASE:
+ ret = pen_handle_button_release(this, 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) {
+ gint ret = FALSE;
+
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ ret = pen_handle_button_press(this, event->button);
+ break;
+
+ case GDK_MOTION_NOTIFY:
+ ret = pen_handle_motion_notify(this, event->motion);
+ break;
+
+ case GDK_BUTTON_RELEASE:
+ ret = pen_handle_button_release(this, event->button);
+ break;
+
+ case GDK_2BUTTON_PRESS:
+ ret = pen_handle_2button_press(this, event->button);
+ break;
+
+ case GDK_KEY_PRESS:
+ ret = pen_handle_key_press(this, event);
+ break;
+
+ default:
+ break;
+ }
+
+ if (!ret) {
+ ret = FreehandBase::root_handler(event);
+ }
+
+ return ret;
+}
+
+/**
+ * Handle mouse button press event.
+ */
+static gint pen_handle_button_press(PenTool *const pc, GdkEventButton const &bevent)
+{
+ if (pc->events_disabled) {
+ // skip event processing if events are disabled
+ return FALSE;
+ }
+
+ FreehandBase * const dc = SP_DRAW_CONTEXT(pc);
+ SPDesktop * const desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
+ Geom::Point const event_w(bevent.x, bevent.y);
+ Geom::Point event_dt(desktop->w2d(event_w));
+ ToolBase *event_context = SP_EVENT_CONTEXT(pc);
+ //Test whether we hit any anchor.
+ SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w);
+ //with this we avoid creating a new point over the existing one
+ if(!bevent.button == 3 && (pc->spiro || pc->bspline) && pc->npoints > 0 && pc->p[0] == pc->p[3]){
+ return FALSE;
+ }
+ //BSpline end
+
+ gint ret = FALSE;
+ if (bevent.button == 1 && !event_context->space_panning
+ // make sure this is not the last click for a waiting LPE (otherwise we want to finish the path)
+ && (pc->expecting_clicks_for_LPE != 1)) {
+
+ if (Inkscape::have_viable_layer(desktop, dc->message_context) == false) {
+ return TRUE;
+ }
+
+ if (!pc->grab ) {
+ // Grab mouse, so release will not pass unnoticed
+ pc->grab = SP_CANVAS_ITEM(desktop->acetate);
+ sp_canvas_item_grab(pc->grab, ( GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK |
+ GDK_BUTTON_RELEASE_MASK |
+ GDK_POINTER_MOTION_MASK ),
+ NULL, bevent.time);
+ }
+
+ pen_drag_origin_w = event_w;
+ pen_within_tolerance = true;
+
+ switch (pc->mode) {
+ case PenTool::MODE_CLICK:
+ // In click mode we add point on release
+ switch (pc->state) {
+ case PenTool::POINT:
+ case PenTool::CONTROL:
+ case PenTool::CLOSE:
+ break;
+ case PenTool::STOP:
+ // This is allowed, if we just canceled curve
+ pc->state = PenTool::POINT;
+ break;
+ default:
+ break;
+ }
+ break;
+ case PenTool::MODE_DRAG:
+ switch (pc->state) {
+ case PenTool::STOP:
+ // This is allowed, if we just canceled curve
+ case PenTool::POINT:
+ if (pc->npoints == 0) {
+
+ Geom::Point p;
+ if ((bevent.state & GDK_CONTROL_MASK) && (pc->polylines_only || pc->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(event_context, 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
+ pc->sa = anchor;
+ //BSpline
+ //Continuamos una curva existente
+ if(anchor){
+ bspline_spiro_start_anchor(pc,(bevent.state & GDK_SHIFT_MASK));
+ }
+ //BSpline End
+ if (anchor && !sp_pen_context_has_waiting_LPE(pc)) {
+ // 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 = sp_desktop_selection(desktop);
+ if (!(bevent.state & GDK_SHIFT_MASK) || sp_pen_context_has_waiting_LPE(pc)) {
+ // 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;
+ spdc_endpoint_snap(pc, p, bevent.state);
+ pc->green_anchor = sp_draw_anchor_new(pc, pc->green_curve, TRUE, p);
+ }
+ spdc_pen_set_initial_point(pc, p);
+ } else {
+
+ // Set end anchor
+ pc->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
+ pc->state = PenTool::CLOSE;
+
+ if (pc->green_anchor && pc->green_anchor->active) {
+ // we clicked on the current curve start, so close it even if
+ // we drag a handle away from it
+ dc->green_closed = TRUE;
+ }
+ ret = TRUE;
+ break;
+
+ } else {
+ p = event_dt;
+ spdc_endpoint_snap(pc, p, bevent.state); // Snap node only if not hitting anchor.
+ spdc_pen_set_subsequent_point(pc, p, true);
+ }
+ }
+
+ //BSpline
+ //Evitamos la creación de un punto de control para que se cree el nodo en el evento de soltar
+ pc->state = (pc->spiro || pc->bspline || pc->polylines_only) ? PenTool::POINT : PenTool::CONTROL;
+ //BSpline End
+
+ 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 (pc->expecting_clicks_for_LPE == 1 && pc->npoints != 0) {
+ // when the last click for a waiting LPE occurs we want to finish the path
+ spdc_pen_finish_segment(pc, event_dt, bevent.state);
+ if (pc->green_closed) {
+ // finishing at the start anchor, close curve
+ spdc_pen_finish(pc, TRUE);
+ } else {
+ // finishing at some other anchor, finish curve but not close
+ spdc_pen_finish(pc, FALSE);
+ }
+
+ ret = TRUE;
+ } else if (bevent.button == 3 && pc->npoints != 0) {
+ // right click - finish path
+ spdc_pen_finish(pc, FALSE);
+ ret = TRUE;
+ }
+
+ if (pc->expecting_clicks_for_LPE > 0) {
+ --pc->expecting_clicks_for_LPE;
+ }
+ return ret;
+}
+
+/**
+ * Handle motion_notify event.
+ */
+static gint pen_handle_motion_notify(PenTool *const pc, GdkEventMotion const &mevent)
+{
+ gint ret = FALSE;
+
+ ToolBase *event_context = SP_EVENT_CONTEXT(pc);
+ SPDesktop * const dt = SP_EVENT_CONTEXT_DESKTOP(event_context);
+
+ if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
+ // allow scrolling
+ return FALSE;
+ }
+
+ if (pc->events_disabled) {
+ // skip motion events if pen events are disabled
+ return FALSE;
+ }
+
+ Geom::Point const event_w(mevent.x,
+ mevent.y);
+ //BSpline
+ //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);
+ //"spiro_color" lo ejecutamos siempre sea o no spiro
+ 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.
+ }
+ }
+ //BSpline END
+ // 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 = dt->w2d(event_w);
+ // Test, whether we hit any anchor
+ SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
+ switch (pc->mode) {
+ case PenTool::MODE_CLICK:
+ switch (pc->state) {
+ case PenTool::POINT:
+ if ( pc->npoints != 0 ) {
+ // Only set point, if we are already appending
+ spdc_endpoint_snap(pc, p, mevent.state);
+ spdc_pen_set_subsequent_point(pc, p, true);
+ ret = TRUE;
+ } else if (!sp_event_context_knot_mouseover(pc)) {
+ SnapManager &m = dt->namedview->snap_manager;
+ m.setup(dt);
+ 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
+ spdc_endpoint_snap(pc, p, mevent.state);
+ spdc_pen_set_ctrl(pc, p, mevent.state);
+ ret = TRUE;
+ break;
+ case PenTool::STOP:
+ // This is perfectly valid
+ break;
+ default:
+ break;
+ }
+ break;
+ case PenTool::MODE_DRAG:
+ switch (pc->state) {
+ case PenTool::POINT:
+ if ( pc->npoints > 0 ) {
+ // Only set point, if we are already appending
+
+ if (!anchor) { // Snap node only if not hitting anchor
+ spdc_endpoint_snap(pc, p, mevent.state);
+ spdc_pen_set_subsequent_point(pc, p, true, mevent.state);
+ } else {
+ spdc_pen_set_subsequent_point(pc, anchor->dp, false, mevent.state);
+ }
+
+ if (anchor && !pc->anchor_statusbar) {
+ if(!pc->spiro && !pc->bspline){
+ pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path."));
+ }else{
+ pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path. Shift to cusp node"));
+ }
+ pc->anchor_statusbar = true;
+ } else if (!anchor && pc->anchor_statusbar) {
+ pc->message_context->clear();
+ pc->anchor_statusbar = false;
+ }
+
+ ret = TRUE;
+ } else {
+ if (anchor && !pc->anchor_statusbar) {
+ if(!pc->spiro && !pc->bspline){
+ pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point."));
+ }else{
+ pc->message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point. Shift to cusp node"));
+ }
+ pc->anchor_statusbar = true;
+ } else if (!anchor && pc->anchor_statusbar) {
+ pc->message_context->clear();
+ pc->anchor_statusbar = false;
+ }
+ if (!sp_event_context_knot_mouseover(pc)) {
+ SnapManager &m = dt->namedview->snap_manager;
+ m.setup(dt);
+ 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
+ spdc_endpoint_snap_handle(pc, p, mevent.state);
+ if (!pc->polylines_only) {
+ spdc_pen_set_ctrl(pc, p, mevent.state);
+ } else {
+ spdc_pen_set_ctrl(pc, pc->p[1], mevent.state);
+ }
+
+ gobble_motion_events(GDK_BUTTON1_MASK);
+ ret = TRUE;
+ break;
+ case PenTool::STOP:
+ // This is perfectly valid
+ break;
+ default:
+ if (!sp_event_context_knot_mouseover(pc)) {
+ SnapManager &m = dt->namedview->snap_manager;
+ m.setup(dt);
+ m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_NODE_HANDLE));
+ m.unSetup();
+ }
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ //BSpline
+ //Lanzamos la función "bspline_spiro_motion" al moverse el ratón o cuando se para.
+ if(pc->bspline){
+ bspline_spiro_color(pc);
+ bspline_spiro_motion(pc,(mevent.state & GDK_SHIFT_MASK));
+ }else{
+ if ( Geom::LInfty( event_w - pen_drag_origin_w ) > tolerance || mevent.time == 0) {
+ bspline_spiro_color(pc);
+ bspline_spiro_motion(pc,(mevent.state & GDK_SHIFT_MASK));
+ pen_drag_origin_w = event_w;
+ }
+ }
+ //BSpline End
+ return ret;
+}
+
+/**
+ * Handle mouse button release event.
+ */
+static gint pen_handle_button_release(PenTool *const pc, GdkEventButton const &revent)
+{
+ if (pc->events_disabled) {
+ // skip event processing if events are disabled
+ return FALSE;
+ }
+
+ gint ret = FALSE;
+
+ ToolBase *event_context = SP_EVENT_CONTEXT(pc);
+ if ( revent.button == 1 && !event_context->space_panning) {
+
+ FreehandBase *dc = SP_DRAW_CONTEXT (pc);
+
+ Geom::Point const event_w(revent.x,
+ revent.y);
+ // Find desktop coordinates
+ Geom::Point p = pc->desktop->w2d(event_w);
+
+ // Test whether we hit any anchor.
+ SPDrawAnchor *anchor = spdc_test_inside(pc, event_w);
+ //BSpline
+ //with this we avoid creating a new point over the existing one
+ if(pc->spiro || pc->bspline){
+ //Si intentamos crear un nodo en el mismo sitio que el origen, paramos.
+ if(pc->npoints > 0 && pc->p[0] == pc->p[3]){
+ return FALSE;
+ }
+ }
+ //BSpline End
+ switch (pc->mode) {
+ case PenTool::MODE_CLICK:
+ switch (pc->state) {
+ case PenTool::POINT:
+ if ( pc->npoints == 0 ) {
+ // Start new thread only with button release
+ if (anchor) {
+ p = anchor->dp;
+ }
+ pc->sa = anchor;
+ //BSpline
+ //continuamos una curva existente
+ if (anchor) {
+ if(pc->bspline || pc->spiro){
+ bspline_spiro_start_anchor(pc,(revent.state & GDK_SHIFT_MASK));
+ }
+ }
+ //BSpline End
+ spdc_pen_set_initial_point(pc, p);
+ } else {
+ // Set end anchor here
+ pc->ea = anchor;
+ if (anchor) {
+ p = anchor->dp;
+ }
+ }
+ pc->state = PenTool::CONTROL;
+ ret = TRUE;
+ break;
+ case PenTool::CONTROL:
+ // End current segment
+ spdc_endpoint_snap(pc, p, revent.state);
+ spdc_pen_finish_segment(pc, p, revent.state);
+ pc->state = PenTool::POINT;
+ ret = TRUE;
+ break;
+ case PenTool::CLOSE:
+ // End current segment
+ if (!anchor) { // Snap node only if not hitting anchor
+ spdc_endpoint_snap(pc, p, revent.state);
+ }
+ spdc_pen_finish_segment(pc, p, revent.state);
+ //BSpline
+ //Ocultamos la guia del penultimo nodo al cerrar la curva
+ if(pc->spiro){
+ sp_canvas_item_hide(pc->c1);
+ }
+ //BSpline End
+ spdc_pen_finish(pc, TRUE);
+ pc->state = PenTool::POINT;
+ ret = TRUE;
+ break;
+ case PenTool::STOP:
+ // This is allowed, if we just canceled curve
+ pc->state = PenTool::POINT;
+ ret = TRUE;
+ break;
+ default:
+ break;
+ }
+ break;
+ case PenTool::MODE_DRAG:
+ switch (pc->state) {
+ case PenTool::POINT:
+ case PenTool::CONTROL:
+ spdc_endpoint_snap(pc, p, revent.state);
+ spdc_pen_finish_segment(pc, p, revent.state);
+ break;
+ case PenTool::CLOSE:
+ spdc_endpoint_snap(pc, p, revent.state);
+ spdc_pen_finish_segment(pc, p, revent.state);
+ //BSpline
+ //Ocultamos la guia del penultimo nodo al cerrar la curva
+ if(pc->spiro){
+ sp_canvas_item_hide(pc->c1);
+ }
+ //BSpline End
+ if (pc->green_closed) {
+ // finishing at the start anchor, close curve
+ spdc_pen_finish(pc, TRUE);
+ } else {
+ // finishing at some other anchor, finish curve but not close
+ spdc_pen_finish(pc, FALSE);
+ }
+ break;
+ case PenTool::STOP:
+ // This is allowed, if we just cancelled curve
+ break;
+ default:
+ break;
+ }
+ pc->state = PenTool::POINT;
+ ret = TRUE;
+ break;
+ default:
+ break;
+ }
+ if (pc->grab) {
+ // Release grab now
+ sp_canvas_item_ungrab(pc->grab, revent.time);
+ pc->grab = NULL;
+ }
+
+ ret = TRUE;
+
+ dc->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 (pc->expecting_clicks_for_LPE == 0 && sp_pen_context_has_waiting_LPE(pc)) {
+ sp_pen_context_set_polyline_mode(pc);
+
+ ToolBase *ec = SP_EVENT_CONTEXT(pc);
+ Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
+
+ if (pc->waiting_LPE) {
+ // we have an already created LPE waiting for a path
+ pc->waiting_LPE->acceptParamPath(SP_PATH(selection->singleItem()));
+ selection->add(SP_OBJECT(pc->waiting_item));
+ pc->waiting_LPE = NULL;
+ } 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;
+}
+
+static gint pen_handle_2button_press(PenTool *const pc, GdkEventButton const &bevent)
+{
+ gint ret = FALSE;
+ // only end on LMB double click. Otherwise horizontal scrolling causes ending of the path
+ if (pc->npoints != 0 && bevent.button == 1) {
+ spdc_pen_finish(pc, FALSE);
+ ret = TRUE;
+ }
+ return ret;
+}
+
+static void pen_redraw_all (PenTool *const pc)
+{
+ // green
+ if (pc->green_bpaths) {
+ // remove old piecewise green canvasitems
+ while (pc->green_bpaths) {
+ sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
+ pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+ }
+ // one canvas bpath for all of green_curve
+ SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+ sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
+ pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
+ }
+ if (pc->green_anchor)
+ SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
+ pc->red_curve->reset();
+ pc->red_curve->moveto(pc->p[0]);
+ pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
+
+ // handles
+ //BSpline
+ //Ocultamos los tiradores en modo BSpline y spiro
+ if (pc->p[0] != pc->p[1] && !pc->spiro && !pc->bspline) {
+ //BSpline End
+ SP_CTRL(pc->c1)->moveto(pc->p[1]);
+ pc->cl1->setCoords(pc->p[0], pc->p[1]);
+ sp_canvas_item_show(pc->c1);
+ sp_canvas_item_show(pc->cl1);
+ } else {
+ sp_canvas_item_hide(pc->c1);
+ sp_canvas_item_hide(pc->cl1);
+ }
+
+ Geom::Curve const * last_seg = pc->green_curve->last_segment();
+ if (last_seg) {
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( last_seg );
+ //BSpline
+ //Ocultamos los tiradores en modo BSpline y spiro
+ if ( cubic &&
+ (*cubic)[2] != pc->p[0] && !pc->spiro && !pc->bspline )
+ {
+ //BSpline End
+ Geom::Point p2 = (*cubic)[2];
+ SP_CTRL(pc->c0)->moveto(p2);
+ pc->cl0->setCoords(p2, pc->p[0]);
+ sp_canvas_item_show(pc->c0);
+ sp_canvas_item_show(pc->cl0);
+ } else {
+ sp_canvas_item_hide(pc->c0);
+ sp_canvas_item_hide(pc->cl0);
+ }
+ }
+ //BSpline
+ //Simplemente redibujamos la spiro teniendo en cuenta si el nodo es cusp o symm.
+ //como es un redibujo simplemente no llamamos a la función global
+ //sino al final de esta
+
+ //BSpline
+ //Lanzamos solamente el redibujado
+ bspline_spiro_build(pc);
+ //BSpline End
+}
+
+static void pen_lastpoint_move (PenTool *const pc, gdouble x, gdouble y)
+{
+ if (pc->npoints != 5)
+ return;
+
+ // green
+ if (!pc->green_curve->is_empty()) {
+ pc->green_curve->last_point_additive_move( Geom::Point(x,y) );
+ } else {
+ // start anchor too
+ if (pc->green_anchor) {
+ pc->green_anchor->dp += Geom::Point(x, y);
+ }
+ }
+
+ // red
+ pc->p[0] += Geom::Point(x, y);
+ pc->p[1] += Geom::Point(x, y);
+ pen_redraw_all(pc);
+}
+
+static void pen_lastpoint_move_screen (PenTool *const pc, gdouble x, gdouble y)
+{
+ pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
+}
+
+static void pen_lastpoint_tocurve (PenTool *const pc)
+{
+ //BSpline
+ //Evitamos que si la "red_curve" tiene solo dos puntos -recta- no se pare aqui.
+ if (pc->npoints != 5 && !pc->spiro && !pc->bspline)
+ return;
+ //BSpline
+ Geom::CubicBezier const * cubic;
+ pc->p[1] = pc->red_curve->last_segment()->initialPoint() + (1./3)* (Geom::Point)(pc->red_curve->last_segment()->finalPoint() - pc->red_curve->last_segment()->initialPoint());
+ //Modificamos el último segmento de la curva verde para que forme el tipo de nodo que deseamos
+ if(pc->spiro||pc->bspline){
+ if(!pc->green_curve->is_empty()){
+ Geom::Point A(0,0);
+ Geom::Point B(0,0);
+ Geom::Point C(0,0);
+ Geom::Point D(0,0);
+ SPCurve * previous = new SPCurve();
+ cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() );
+ //We obtain the last segment 4 points in the previous curve
+ if ( cubic ){
+ A = (*cubic)[0];
+ B = (*cubic)[1];
+ if(pc->spiro){
+ C = pc->p[0] + (Geom::Point)(pc->p[0] - pc->p[1]);
+ }else
+ C = pc->green_curve->last_segment()->finalPoint() + (1./3)* (Geom::Point)(pc->green_curve->last_segment()->initialPoint() - pc->green_curve->last_segment()->finalPoint());
+ D = (*cubic)[3];
+ }else{
+ A = pc->green_curve->last_segment()->initialPoint();
+ B = pc->green_curve->last_segment()->initialPoint();
+ if(pc->spiro)
+ C = pc->p[0] + (Geom::Point)(pc->p[0] - pc->p[1]);
+ else
+ C = pc->green_curve->last_segment()->finalPoint() + (1./3)* (Geom::Point)(pc->green_curve->last_segment()->initialPoint() - pc->green_curve->last_segment()->finalPoint());
+ D = pc->green_curve->last_segment()->finalPoint();
+ }
+ previous->moveto(A);
+ previous->curveto(B, C, D);
+ if( pc->green_curve->get_segment_count() == 1){
+ pc->green_curve = previous;
+ }else{
+ //we eliminate the last segment
+ pc->green_curve->backspace();
+ //and we add it again with the recreation
+ pc->green_curve->append_continuous(previous, 0.0625);
+ }
+ }
+ //Si el último nodo es una union con otra curva
+ if(pc->green_curve->is_empty() && pc->sa && !pc->sa->curve->is_empty()){
+ bspline_spiro_start_anchor(pc, false);
+ }
+ }
+
+ //Spiro Live
+ pen_redraw_all(pc);
+}
+
+static void pen_lastpoint_toline (PenTool *const pc)
+{
+ //BSpline
+ //Evitamos que si la "red_curve" tiene solo dos puntos -recta- no se pare aqui.
+ if (pc->npoints != 5 && !pc->bspline)
+ return;
+
+ //Modificamos el último segmento de la curva verde para que forme el tipo de nodo que deseamos
+ if(pc->spiro || pc->bspline){
+ if(!pc->green_curve->is_empty()){
+ Geom::Point A(0,0);
+ Geom::Point B(0,0);
+ Geom::Point C(0,0);
+ Geom::Point D(0,0);
+ SPCurve * previous = new SPCurve();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() );
+ if ( cubic ) {
+ A = pc->green_curve->last_segment()->initialPoint();
+ B = (*cubic)[1];
+ C = pc->green_curve->last_segment()->finalPoint();
+ D = C;
+ } else {
+ //We obtain the last segment 4 points in the previous curve
+ A = pc->green_curve->last_segment()->initialPoint();
+ B = A;
+ C = pc->green_curve->last_segment()->finalPoint();
+ D = C;
+ }
+ previous->moveto(A);
+ previous->curveto(B, C, D);
+ if( pc->green_curve->get_segment_count() == 1){
+ pc->green_curve = previous;
+ }else{
+ //we eliminate the last segment
+ pc->green_curve->backspace();
+ //and we add it again with the recreation
+ pc->green_curve->append_continuous(previous, 0.0625);
+ }
+ }
+ //Si el último nodo es una union con otra curva
+ if(pc->green_curve->is_empty() && pc->sa && !pc->sa->curve->is_empty()){
+ bspline_spiro_start_anchor(pc, true);
+ }
+ }
+
+ pc->p[1] = pc->p[0];
+ pen_redraw_all(pc);
+}
+
+
+static gint pen_handle_key_press(PenTool *const pc, GdkEvent *event)
+{
+
+ gint ret = FALSE;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ gdouble const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
+
+ switch (get_group0_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)) pen_lastpoint_move_screen(pc, -10, 0); // shift
+ else pen_lastpoint_move_screen(pc, -1, 0); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT(event)) pen_lastpoint_move(pc, -10*nudge, 0); // shift
+ else pen_lastpoint_move(pc, -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)) pen_lastpoint_move_screen(pc, 0, 10); // shift
+ else pen_lastpoint_move_screen(pc, 0, 1); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 0, 10*nudge); // shift
+ else pen_lastpoint_move(pc, 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)) pen_lastpoint_move_screen(pc, 10, 0); // shift
+ else pen_lastpoint_move_screen(pc, 1, 0); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 10*nudge, 0); // shift
+ else pen_lastpoint_move(pc, 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)) pen_lastpoint_move_screen(pc, 0, -10); // shift
+ else pen_lastpoint_move_screen(pc, 0, -1); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT(event)) pen_lastpoint_move(pc, 0, -10*nudge); // shift
+ else pen_lastpoint_move(pc, 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)) {
+ pen_lastpoint_tocurve(pc);
+ ret = TRUE;
+ }
+ break;
+ case GDK_KEY_L:
+ case GDK_KEY_l:
+ if (MOD__SHIFT_ONLY(event)) {
+ pen_lastpoint_toline(pc);
+ ret = TRUE;
+ }
+ break;
+
+ case GDK_KEY_Return:
+ case GDK_KEY_KP_Enter:
+ if (pc->npoints != 0) {
+ spdc_pen_finish(pc, FALSE);
+ ret = TRUE;
+ }
+ break;
+ case GDK_KEY_Escape:
+ if (pc->npoints != 0) {
+ // if drawing, cancel, otherwise pass it up for deselecting
+ pen_cancel (pc);
+ ret = TRUE;
+ }
+ break;
+ case GDK_KEY_z:
+ case GDK_KEY_Z:
+ if (MOD__CTRL_ONLY(event) && pc->npoints != 0) {
+ // if drawing, cancel, otherwise pass it up for undo
+ pen_cancel (pc);
+ ret = TRUE;
+ }
+ break;
+ case GDK_KEY_g:
+ case GDK_KEY_G:
+ if (MOD__SHIFT_ONLY(event)) {
+ sp_selection_to_guides(SP_EVENT_CONTEXT(pc)->desktop);
+ ret = true;
+ }
+ break;
+ case GDK_KEY_BackSpace:
+ case GDK_KEY_Delete:
+ case GDK_KEY_KP_Delete:
+ if ( pc->green_curve->is_empty() || (pc->green_curve->last_segment() == NULL) ) {
+ if (!pc->red_curve->is_empty()) {
+ pen_cancel (pc);
+ ret = TRUE;
+ } else {
+ // do nothing; this event should be handled upstream
+ }
+ } else {
+ // Reset red curve
+ Geom::CubicBezier const * cubic = NULL;
+ pc->red_curve->reset();
+ // Destroy topmost green bpath
+ if (pc->green_bpaths) {
+ if (pc->green_bpaths->data)
+ sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
+ pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+ }
+ // Get last segment
+ if ( pc->green_curve->is_empty() ) {
+ g_warning("pen_handle_key_press, case GDK_KP_Delete: Green curve is empty");
+ break;
+ }
+ // The code below assumes that pc->green_curve has only ONE path !
+ Geom::Curve const * crv = pc->green_curve->last_segment();
+ pc->p[0] = crv->initialPoint();
+ cubic = dynamic_cast<Geom::CubicBezier const *>(crv);
+ if ( cubic ) {
+ pc->p[1] = (*cubic)[1];
+ } else {
+ pc->p[1] = pc->p[0];
+ }
+ //Asignamos el valor a un tercio de distancia del último segmento.
+ if(pc->bspline){
+ pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
+ }
+
+ Geom::Point const pt((pc->npoints < 4
+ ? (Geom::Point)(crv->finalPoint())
+ : pc->p[3]));
+
+ pc->npoints = 2;
+ //BSpline
+ //Eliminamos el último segmento de la curva verde
+ if( pc->green_curve->get_segment_count() == 1){
+ pc->npoints = 5;
+ if (pc->green_bpaths) {
+ if (pc->green_bpaths->data)
+ sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
+ pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+ }
+ pc->green_curve->reset();
+ }else{
+ pc->green_curve->backspace();
+ }
+ //Asignamos el valor de pc->p[1] a el opuesto de el ultimo segmento de la línea verde
+ if(pc->spiro){
+ cubic = dynamic_cast<Geom::CubicBezier const *>(pc->green_curve->last_segment());
+ if ( cubic ) {
+ pc->p[1] = (*cubic)[3] + (Geom::Point)((*cubic)[3] - (*cubic)[2]);
+ SP_CTRL(pc->c1)->moveto(pc->p[0]);
+ } else {
+ pc->p[1] = pc->p[0];
+ }
+ }
+ //BSpline End
+ sp_canvas_item_hide(pc->cl0);
+ sp_canvas_item_hide(pc->cl1);
+ pc->state = PenTool::POINT;
+ spdc_pen_set_subsequent_point(pc, pt, true);
+ pen_last_paraxial_dir = !pen_last_paraxial_dir;
+ //BSpline
+ //Redibujamos
+ bspline_spiro_build(pc);
+ //BSpline End
+ ret = TRUE;
+ }
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+static void spdc_reset_colors(PenTool *pc)
+{
+ // Red
+ pc->red_curve->reset();
+
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
+ // Blue
+ pc->blue_curve->reset();
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), NULL);
+
+ // Green
+ while (pc->green_bpaths) {
+ sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
+ pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+ }
+ pc->green_curve->reset();
+ if (pc->green_anchor) {
+ pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
+ }
+ pc->sa = NULL;
+ pc->ea = NULL;
+ pc->npoints = 0;
+ pc->red_curve_is_valid = false;
+}
+
+
+static void spdc_pen_set_initial_point(PenTool *const pc, Geom::Point const p)
+{
+ g_assert( pc->npoints == 0 );
+
+ pc->p[0] = p;
+ pc->p[1] = p;
+ pc->npoints = 2;
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
+
+ pc->desktop->canvas->forceFullRedrawAfterInterruptions(5);
+}
+
+/**
+ * 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&#176;, distance %s").
+ */
+static void spdc_pen_set_angle_distance_status_message(PenTool *const pc, Geom::Point const p, int pc_point_to_compare, gchar const *message)
+{
+ g_assert(pc != NULL);
+ g_assert((pc_point_to_compare == 0) || (pc_point_to_compare == 3)); // exclude control handles
+ g_assert(message != NULL);
+
+ SPDesktop *desktop = SP_EVENT_CONTEXT(pc)->desktop;
+ Geom::Point rel = p - pc->p[pc_point_to_compare];
+ Inkscape::Util::Quantity q = Inkscape::Util::Quantity(Geom::L2(rel), "px");
+ GString *dist = g_string_new(q.string(desktop->namedview->doc_units).c_str());
+ double angle = atan2(rel[Geom::Y], rel[Geom::X]) * 180 / M_PI;
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ if (prefs->getBool("/options/compassangledisplay/value", 0) != 0) {
+ angle = 90 - angle;
+ if (angle < 0) {
+ angle += 360;
+ }
+ }
+
+ pc->message_context->setF(Inkscape::IMMEDIATE_MESSAGE, message, angle, dist->str);
+ g_string_free(dist, FALSE);
+}
+
+
+//Esta función cambia los colores rojo,verde y azul haciendolos transparentes o no en función de si se usa spiro
+static void bspline_spiro_color(PenTool *const pc)
+{
+ bool remake_green_bpaths = false;
+ if(pc->spiro){
+ //If the colour is not defined as trasparent, por example when changing
+ //from drawing to spiro mode or when selecting the pen tool
+ if(pc->green_color != 0x00ff000){
+ //We change the green and red colours to transparent, so this lines are not necessary
+ //to the drawing with spiro
+ pc->red_color = 0xff00000;
+ pc->green_color = 0x00ff000;
+ remake_green_bpaths = true;
+ }
+ }else{
+ //If we come from working with the spiro curve and change the mode the "green_curve" colour is transparent
+ if(pc->green_color != 0x00ff007f){
+ //since we are not im spiro mode, we assign the original colours
+ //to the red and the green curve, removing their transparency
+ pc->red_color = 0xff00007f;
+ pc->green_color = 0x00ff007f;
+ remake_green_bpaths = true;
+ }
+ //we hide the spiro/bspline rests
+ if(!pc->bspline){
+ sp_canvas_item_hide(pc->blue_bpath);
+ }
+ }
+ //We erase all the "green_bpaths" to recreate them after with the colour
+ //transparency recently modified
+ if (pc->green_bpaths && remake_green_bpaths) {
+ // remove old piecewise green canvasitems
+ while (pc->green_bpaths) {
+ sp_canvas_item_destroy(SP_CANVAS_ITEM(pc->green_bpaths->data));
+ pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+ }
+ // one canvas bpath for all of green_curve
+ SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+ sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
+ pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
+ }
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(pc->red_bpath), pc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+}
+
+
+static void bspline_spiro(PenTool *const pc, bool shift)
+{
+ if(!pc->spiro && !pc->bspline)
+ return;
+
+ if(!pc->anchor_statusbar)
+ shift?bspline_spiro_off(pc):bspline_spiro_on(pc);
+
+ bspline_spiro_build(pc);
+}
+
+static void bspline_spiro_on(PenTool *const pc)
+{
+ if(!pc->red_curve->is_empty()){
+ using Geom::X;
+ using Geom::Y;
+ pc->npoints = 5;
+ pc->p[0] = pc->red_curve->first_segment()->initialPoint();
+ pc->p[3] = pc->red_curve->first_segment()->finalPoint();
+ pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]);
+ pc->p[2] = Geom::Point(pc->p[2][X] + 0.0001,pc->p[2][Y] + 0.0001);
+ }
+}
+
+static void bspline_spiro_off(PenTool *const pc)
+{
+ if(!pc->red_curve->is_empty()){
+ pc->npoints = 5;
+ pc->p[0] = pc->red_curve->first_segment()->initialPoint();
+ pc->p[3] = pc->red_curve->first_segment()->finalPoint();
+ pc->p[2] = pc->p[3];
+ }
+}
+
+static void bspline_spiro_start_anchor(PenTool *const pc, bool shift)
+{
+ if(!pc->spiro && !pc->bspline)
+ return;
+
+ if(pc->sa->curve->is_empty())
+ return;
+
+ if(shift)
+ bspline_spiro_start_anchor_off(pc);
+ else
+ bspline_spiro_start_anchor_on(pc);
+}
+
+static void bspline_spiro_start_anchor_on(PenTool *const pc)
+{
+ using Geom::X;
+ using Geom::Y;
+ SPCurve *tmpCurve = new SPCurve();
+ tmpCurve = pc->sa->curve->copy();
+ if(pc->sa->start)
+ tmpCurve = tmpCurve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ SPCurve *lastSeg = new SPCurve();
+ Geom::Point A = tmpCurve->last_segment()->initialPoint();
+ Geom::Point D = tmpCurve->last_segment()->finalPoint();
+ Geom::Point C = D + (1./3)*(A - D);
+ C = Geom::Point(C[X] + 0.0001,C[Y] + 0.0001);
+ if(cubic){
+ lastSeg->moveto(A);
+ lastSeg->curveto((*cubic)[1],C,D);
+ }else{
+ lastSeg->moveto(A);
+ lastSeg->curveto(A,C,D);
+ }
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ if (pc->sa->start) {
+ tmpCurve = tmpCurve->create_reverse();
+ }
+ pc->sa->curve->reset();
+ pc->sa->curve = tmpCurve;
+}
+
+static void bspline_spiro_start_anchor_off(PenTool *const pc)
+{
+ SPCurve *tmpCurve = new SPCurve();
+ tmpCurve = pc->sa->curve->copy();
+ if(pc->sa->start)
+ tmpCurve = tmpCurve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(cubic){
+ SPCurve *lastSeg = new SPCurve();
+ lastSeg->moveto((*cubic)[0]);
+ lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]);
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ if (pc->sa->start) {
+ tmpCurve = tmpCurve->create_reverse();
+ }
+ pc->sa->curve->reset();
+ pc->sa->curve = tmpCurve;
+ }
+
+}
+
+static void bspline_spiro_motion(PenTool *const pc, bool shift){
+ if(!pc->spiro && !pc->bspline)
+ return;
+
+ using Geom::X;
+ using Geom::Y;
+ SPCurve *tmpCurve = new SPCurve();
+ pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]);
+ if(pc->green_curve->is_empty() && !pc->sa){
+ pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]);
+ }else if(!pc->green_curve->is_empty()){
+ tmpCurve = pc->green_curve->copy();
+ }else{
+ tmpCurve = pc->sa->curve->copy();
+ if(pc->sa->start)
+ tmpCurve = tmpCurve->create_reverse();
+
+ }
+ if(!tmpCurve->is_empty() && !pc->red_curve->is_empty()){
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(cubic){
+ if(pc->bspline){
+ SPCurve * WPower = new SPCurve();
+ Geom::D2< Geom::SBasis > SBasisWPower;
+ WPower->moveto(tmpCurve->last_segment()->finalPoint());
+ WPower->lineto(tmpCurve->last_segment()->initialPoint());
+ float WP = Geom::nearest_point((*cubic)[2],*WPower->first_segment());
+ WPower->reset();
+ WPower->moveto(pc->red_curve->last_segment()->initialPoint());
+ WPower->lineto(pc->red_curve->last_segment()->finalPoint());
+ SBasisWPower = WPower->first_segment()->toSBasis();
+ WPower->reset();
+ pc->p[1] = SBasisWPower.valueAt(WP);
+ if(!Geom::are_near(pc->p[1],pc->p[0]))
+ pc->p[1] = Geom::Point(pc->p[1][X] + 0.0001,pc->p[1][Y] + 0.0001);
+ if(shift)
+ pc->p[2]=pc->p[3];
+ else
+ pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]);
+ }else{
+ pc->p[1] = (*cubic)[3] + (Geom::Point)((*cubic)[3] - (*cubic)[2] );
+ }
+ }else{
+ pc->p[1] = pc->p[0];
+ }
+ }
+
+ if(pc->anchor_statusbar && !pc->red_curve->is_empty()){
+ if(shift)
+ bspline_spiro_end_anchor_off(pc);
+ else
+ bspline_spiro_end_anchor_on(pc);
+ }
+
+ bspline_spiro_build(pc);
+}
+
+static void bspline_spiro_end_anchor_on(PenTool *const pc)
+{
+
+ using Geom::X;
+ using Geom::Y;
+ pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]);
+ pc->p[2] = Geom::Point(pc->p[2][X] + 0.0001,pc->p[2][Y] + 0.0001);
+ SPCurve *tmpCurve = new SPCurve();
+ SPCurve *lastSeg = new SPCurve();
+ Geom::Point C(0,0);
+ if(!pc->sa || pc->sa->curve->is_empty()){
+ tmpCurve = pc->green_curve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(pc->bspline){
+ C = tmpCurve->last_segment()->finalPoint() + (1./3)*(tmpCurve->last_segment()->initialPoint() - tmpCurve->last_segment()->finalPoint());
+ C = Geom::Point(C[X] + 0.0001,C[Y] + 0.0001);
+ }else{
+ C = pc->p[3] + (Geom::Point)(pc->p[3] - pc->p[2] );
+ }
+ if(cubic){
+ lastSeg->moveto((*cubic)[0]);
+ lastSeg->curveto((*cubic)[1],C,(*cubic)[3]);
+ }else{
+ lastSeg->moveto(tmpCurve->last_segment()->initialPoint());
+ lastSeg->curveto(tmpCurve->last_segment()->initialPoint(),C,tmpCurve->last_segment()->finalPoint());
+ }
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ tmpCurve = tmpCurve->create_reverse();
+ pc->green_curve->reset();
+ pc->green_curve = tmpCurve;
+ }else{
+ tmpCurve = pc->sa->curve->copy();
+ if(!pc->sa->start)
+ tmpCurve = tmpCurve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(pc->bspline){
+ C = tmpCurve->last_segment()->finalPoint() + (1./3)*(tmpCurve->last_segment()->initialPoint() - tmpCurve->last_segment()->finalPoint());
+ C = Geom::Point(C[X] + 0.0001,C[Y] + 0.0001);
+ }else{
+ C = pc->p[3] + (Geom::Point)(pc->p[3] - pc->p[2] );
+ }
+ if(cubic){
+ lastSeg->moveto((*cubic)[0]);
+ lastSeg->curveto((*cubic)[1],C,(*cubic)[3]);
+ }else{
+ lastSeg->moveto(tmpCurve->last_segment()->initialPoint());
+ lastSeg->curveto(tmpCurve->last_segment()->initialPoint(),C,tmpCurve->last_segment()->finalPoint());
+ }
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ if (!pc->sa->start) {
+ tmpCurve = tmpCurve->create_reverse();
+ }
+ pc->sa->curve->reset();
+ pc->sa->curve = tmpCurve;
+ }
+}
+
+static void bspline_spiro_end_anchor_off(PenTool *const pc)
+{
+
+ pc->p[2] = pc->p[3];
+ SPCurve *tmpCurve = new SPCurve();
+ SPCurve *lastSeg = new SPCurve();
+ if(!pc->sa || pc->sa->curve->is_empty()){
+ tmpCurve = pc->green_curve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(cubic){
+ lastSeg->moveto((*cubic)[0]);
+ lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]);
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ tmpCurve = tmpCurve->create_reverse();
+ pc->green_curve->reset();
+ pc->green_curve = tmpCurve;
+ }
+ }else{
+ tmpCurve = pc->sa->curve->copy();
+ if(!pc->sa->start)
+ tmpCurve = tmpCurve->create_reverse();
+ Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const*>(&*tmpCurve->last_segment());
+ if(cubic){
+ lastSeg->moveto((*cubic)[0]);
+ lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]);
+ if( tmpCurve->get_segment_count() == 1){
+ tmpCurve = lastSeg;
+ }else{
+ //we eliminate the last segment
+ tmpCurve->backspace();
+ //and we add it again with the recreation
+ tmpCurve->append_continuous(lastSeg, 0.0625);
+ }
+ if (!pc->sa->start) {
+ tmpCurve = tmpCurve->create_reverse();
+ }
+ pc->sa->curve->reset();
+ pc->sa->curve = tmpCurve;
+ }
+ }
+}
+
+
+//preparates the curves for its trasformation into BSline curves.
+static void bspline_spiro_build(PenTool *const pc)
+{
+ if(!pc->spiro && !pc->bspline)
+ return;
+
+ //We create the base curve
+ SPCurve *curve = new SPCurve();
+ //If we continuate the existing curve we add it at the start
+ if(pc->sa && !pc->sa->curve->is_empty()){
+ curve = pc->sa->curve->copy();
+ if (pc->sa->start) {
+ curve = curve->create_reverse();
+ }
+ }
+
+ if (!pc->green_curve->is_empty())
+ curve->append_continuous(pc->green_curve, 0.0625);
+
+ //and the red one
+ if (!pc->red_curve->is_empty()){
+ pc->red_curve->reset();
+ pc->red_curve->moveto(pc->p[0]);
+ pc->red_curve->curveto(pc->p[1],pc->p[2],pc->p[3]);
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
+ curve->append_continuous(pc->red_curve, 0.0625);
+ }
+
+ if(!curve->is_empty()){
+ //cerramos la curva si estan cerca los puntos finales de la curva spiro
+ if(Geom::are_near(curve->first_path()->initialPoint(), curve->last_path()->finalPoint())){
+ curve->closepath_current();
+ }
+ //TODO: CALL TO CLONED FUNCTION SPIRO::doEffect IN lpe-spiro.cpp
+ //For example
+ //using namespace Inkscape::LivePathEffect;
+ //LivePathEffectObject *lpeobj = static_cast<LivePathEffectObject*> (curve);
+ //Effect *spr = static_cast<Effect*> ( new LPEbspline(lpeobj) );
+ //spr->doEffect(curve);
+ if(pc->bspline){
+ bspline_doEffect(curve);
+ }else{
+ spiro_doEffect(curve);
+ }
+
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->blue_bpath), curve);
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(pc->blue_bpath), pc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+ sp_canvas_item_show(pc->blue_bpath);
+ curve->unref();
+ pc->blue_curve->reset();
+ //We hide the holders that doesn't contribute anything
+ if(pc->spiro){
+ sp_canvas_item_show(pc->c1);
+ SP_CTRL(pc->c1)->moveto(pc->p[0]);
+ }else
+ sp_canvas_item_hide(pc->c1);
+ sp_canvas_item_hide(pc->cl1);
+ sp_canvas_item_hide(pc->c0);
+ sp_canvas_item_hide(pc->cl0);
+ }else{
+ //if the curve is empty
+ sp_canvas_item_hide(pc->blue_bpath);
+
+ }
+}
+
+static void bspline_doEffect(SPCurve * curve)
+{
+ if(curve->get_segment_count() < 2)
+ return;
+ // Make copy of old path as it is changed during processing
+ Geom::PathVector const original_pathv = curve->get_pathvector();
+ curve->reset();
+
+ //Recorremos todos los paths a los que queremos aplicar el efecto, hasta el penúltimo
+ for(Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {
+ //Si está vacío...
+ if (path_it->empty())
+ continue;
+ //Itreadores
+
+ Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
+ Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
+ Geom::Path::const_iterator curve_endit = path_it->end_default(); // this determines when the loop has to stop
+ //Creamos las lineas rectas que unen todos los puntos del trazado y donde se calcularán
+ //los puntos clave para los manejadores.
+ //Esto hace que la curva BSpline no pierda su condición aunque se trasladen
+ //dichos manejadores
+ SPCurve *nCurve = new SPCurve();
+ Geom::Point previousNode(0,0);
+ Geom::Point node(0,0);
+ Geom::Point pointAt1(0,0);
+ Geom::Point pointAt2(0,0);
+ Geom::Point nextPointAt1(0,0);
+ Geom::Point nextPointAt2(0,0);
+ Geom::Point nextPointAt3(0,0);
+ Geom::D2< Geom::SBasis > SBasisIn;
+ Geom::D2< Geom::SBasis > SBasisOut;
+ Geom::D2< Geom::SBasis > SBasisHelper;
+ Geom::CubicBezier const *cubic = NULL;
+ if (path_it->closed()) {
+ // if the path is closed, maybe we have to stop a bit earlier because the closing line segment has zerolength.
+ const Geom::Curve &closingline = path_it->back_closed(); // the closing line segment is always of type Geom::LineSegment.
+ if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
+ // closingline.isDegenerate() did not work, because it only checks for *exact* zero length, which goes wrong for relative coordinates and rounding errors...
+ // the closing line segment has zero-length. So stop before that one!
+ curve_endit = path_it->end_open();
+ }
+ }
+ //Si la curva está cerrada calculamos el punto donde
+ //deveria estar el nodo BSpline de cierre/inicio de la curva
+ //en posible caso de que se cierre con una linea recta creando un nodo BSPline
+
+ //Recorremos todos los segmentos menos el último
+ while ( curve_it2 != curve_endit )
+ {
+ //previousPointAt3 = pointAt3;
+ //Calculamos los puntos que dividirían en tres segmentos iguales el path recto de entrada y de salida
+ SPCurve * in = new SPCurve();
+ in->moveto(curve_it1->initialPoint());
+ in->lineto(curve_it1->finalPoint());
+ cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it1);
+ if(cubic){
+ SBasisIn = in->first_segment()->toSBasis();
+ pointAt1 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[1],*in->first_segment()));
+ pointAt2 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[2],*in->first_segment()));
+ }else{
+ pointAt1 = in->first_segment()->initialPoint();
+ pointAt2 = in->first_segment()->finalPoint();
+ }
+ in->reset();
+ delete in;
+ //Y hacemos lo propio con el path de salida
+ //nextPointAt0 = curveOut.valueAt(0);
+ SPCurve * out = new SPCurve();
+ out->moveto(curve_it2->initialPoint());
+ out->lineto(curve_it2->finalPoint());
+ cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it2);
+ if(cubic){
+ SBasisOut = out->first_segment()->toSBasis();
+ nextPointAt1 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[1],*out->first_segment()));
+ nextPointAt2 = SBasisOut.valueAt(Geom::nearest_point((*cubic)[2],*out->first_segment()));;
+ nextPointAt3 = (*cubic)[3];
+ }else{
+ nextPointAt1 = out->first_segment()->initialPoint();
+ nextPointAt2 = out->first_segment()->finalPoint();
+ nextPointAt3 = out->first_segment()->finalPoint();
+ }
+ out->reset();
+ delete out;
+ //La curva BSpline se forma calculando el centro del segmanto de unión
+ //de el punto situado en las 2/3 partes de el segmento de entrada
+ //con el punto situado en la posición 1/3 del segmento de salida
+ //Estos dos puntos ademas estan posicionados en el lugas correspondiente de
+ //los manejadores de la curva
+ SPCurve *lineHelper = new SPCurve();
+ lineHelper->moveto(pointAt2);
+ lineHelper->lineto(nextPointAt1);
+ SBasisHelper = lineHelper->first_segment()->toSBasis();
+ lineHelper->reset();
+ delete lineHelper;
+ //almacenamos el punto del anterior bucle -o el de cierre- que nos hara de principio de curva
+ previousNode = node;
+ //Y este hará de final de curva
+ node = SBasisHelper.valueAt(0.5);
+ SPCurve *curveHelper = new SPCurve();
+ curveHelper->moveto(previousNode);
+ curveHelper->curveto(pointAt1, pointAt2, node);
+ //añadimos la curva generada a la curva pricipal
+ nCurve->append_continuous(curveHelper, 0.0625);
+ curveHelper->reset();
+ delete curveHelper;
+ //aumentamos los valores para el siguiente paso en el bucle
+ ++curve_it1;
+ ++curve_it2;
+ }
+ //Aberiguamos la ultima parte de la curva correspondiente al último segmento
+ SPCurve *curveHelper = new SPCurve();
+ curveHelper->moveto(node);
+ //Si está cerrada la curva, la cerramos sobre el valor guardado previamente
+ //Si no finalizamos en el punto final
+ Geom::Point startNode(0,0);
+ if (path_it->closed()) {
+ SPCurve * start = new SPCurve();
+ start->moveto(path_it->begin()->initialPoint());
+ start->lineto(path_it->begin()->finalPoint());
+ Geom::D2< Geom::SBasis > SBasisStart = start->first_segment()->toSBasis();
+ SPCurve *lineHelper = new SPCurve();
+ cubic = dynamic_cast<Geom::CubicBezier const*>(&*path_it->begin());
+ if(cubic){
+ lineHelper->moveto(SBasisStart.valueAt(Geom::nearest_point((*cubic)[1],*start->first_segment())));
+ }else{
+ lineHelper->moveto(start->first_segment()->initialPoint());
+ }
+ start->reset();
+ delete start;
+
+ SPCurve * end = new SPCurve();
+ end->moveto(curve_it1->initialPoint());
+ end->lineto(curve_it1->finalPoint());
+ Geom::D2< Geom::SBasis > SBasisEnd = end->first_segment()->toSBasis();
+ //Geom::BezierCurve const *bezier = dynamic_cast<Geom::BezierCurve const*>(&*curve_endit);
+ cubic = dynamic_cast<Geom::CubicBezier const*>(&*curve_it1);
+ if(cubic){
+ lineHelper->lineto(SBasisEnd.valueAt(Geom::nearest_point((*cubic)[2],*end->first_segment())));
+ }else{
+ lineHelper->lineto(end->first_segment()->finalPoint());
+ }
+ end->reset();
+ delete end;
+ SBasisHelper = lineHelper->first_segment()->toSBasis();
+ lineHelper->reset();
+ delete lineHelper;
+ //Guardamos el principio de la curva
+ startNode = SBasisHelper.valueAt(0.5);
+ curveHelper->curveto(nextPointAt1, nextPointAt2, startNode);
+ nCurve->append_continuous(curveHelper, 0.0625);
+ nCurve->move_endpoints(startNode,startNode);
+ }else{
+ SPCurve * start = new SPCurve();
+ start->moveto(path_it->begin()->initialPoint());
+ start->lineto(path_it->begin()->finalPoint());
+ startNode = start->first_segment()->initialPoint();
+ start->reset();
+ delete start;
+ curveHelper->curveto(nextPointAt1, nextPointAt2, nextPointAt3);
+ nCurve->append_continuous(curveHelper, 0.0625);
+ nCurve->move_endpoints(startNode,nextPointAt3);
+ }
+ curveHelper->reset();
+ delete curveHelper;
+ //y cerramos la curva
+ if (path_it->closed()) {
+ nCurve->closepath_current();
+ }
+ curve->append(nCurve,false);
+ nCurve->reset();
+ delete nCurve;
+ }
+}
+
+//Spiro function cloned from lpe-spiro.cpp
+static void spiro_doEffect(SPCurve * curve)
+{
+ using Geom::X;
+ using Geom::Y;
+
+ // Make copy of old path as it is changed during processing
+ Geom::PathVector const original_pathv = curve->get_pathvector();
+ guint len = curve->get_segment_count() + 2;
+
+ curve->reset();
+ Spiro::spiro_cp *path = g_new (Spiro::spiro_cp, len);
+ int ip = 0;
+
+ for(Geom::PathVector::const_iterator path_it = original_pathv.begin(); path_it != original_pathv.end(); ++path_it) {
+ if (path_it->empty())
+ continue;
+
+ // start of path
+ {
+ Geom::Point p = path_it->front().pointAt(0);
+ path[ip].x = p[X];
+ path[ip].y = p[Y];
+ path[ip].ty = '{' ; // for closed paths, this is overwritten
+ ip++;
+ }
+
+ // midpoints
+ Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
+ Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
+
+ Geom::Path::const_iterator curve_endit = path_it->end_default(); // this determines when the loop has to stop
+ if (path_it->closed()) {
+ // if the path is closed, maybe we have to stop a bit earlier because the closing line segment has zerolength.
+ const Geom::Curve &closingline = path_it->back_closed(); // the closing line segment is always of type Geom::LineSegment.
+ if (are_near(closingline.initialPoint(), closingline.finalPoint())) {
+ // closingline.isDegenerate() did not work, because it only checks for *exact* zero length, which goes wrong for relative coordinates and rounding errors...
+ // the closing line segment has zero-length. So stop before that one!
+ curve_endit = path_it->end_open();
+ }
+ }
+
+ while ( curve_it2 != curve_endit )
+ {
+ /* This deals with the node between curve_it1 and curve_it2.
+ * Loop to end_default (so without last segment), loop ends when curve_it2 hits the end
+ * and then curve_it1 points to end or closing segment */
+ Geom::Point p = curve_it1->finalPoint();
+ path[ip].x = p[X];
+ path[ip].y = p[Y];
+
+ // Determine type of spiro node this is, determined by the tangents (angles) of the curves
+ // TODO: see if this can be simplified by using /helpers/geom-nodetype.cpp:get_nodetype
+ bool this_is_line = is_straight_curve(*curve_it1);
+ bool next_is_line = is_straight_curve(*curve_it2);
+
+ Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
+
+ if ( nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM )
+ {
+ if (this_is_line && !next_is_line) {
+ path[ip].ty = ']';
+ } else if (next_is_line && !this_is_line) {
+ path[ip].ty = '[';
+ } else {
+ path[ip].ty = 'c';
+ }
+ } else {
+ path[ip].ty = 'v';
+ }
+
+ ++curve_it1;
+ ++curve_it2;
+ ip++;
+ }
+
+ // add last point to the spiropath
+ Geom::Point p = curve_it1->finalPoint();
+ path[ip].x = p[X];
+ path[ip].y = p[Y];
+ if (path_it->closed()) {
+ // curve_it1 points to the (visually) closing segment. determine the match between first and this last segment (the closing node)
+ Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, path_it->front());
+ switch (nodetype) {
+ case Geom::NODE_NONE: // can't happen! but if it does, it means the path isn't closed :-)
+ path[ip].ty = '}';
+ ip++;
+ break;
+ case Geom::NODE_CUSP:
+ path[0].ty = path[ip].ty = 'v';
+ break;
+ case Geom::NODE_SMOOTH:
+ case Geom::NODE_SYMM:
+ path[0].ty = path[ip].ty = 'c';
+ break;
+ }
+ } else {
+ // set type to path closer
+ path[ip].ty = '}';
+ ip++;
+ }
+
+ // run subpath through spiro
+ int sp_len = ip;
+ Spiro::spiro_run(path, sp_len, *curve);
+ ip = 0;
+ }
+
+ g_free (path);
+}
+
+//BSpline end
+
+static void spdc_pen_set_subsequent_point(PenTool *const pc, Geom::Point const p, bool statusbar, guint status)
+{
+ g_assert( pc->npoints != 0 );
+ // todo: Check callers to see whether 2 <= npoints is guaranteed.
+
+ pc->p[2] = p;
+ pc->p[3] = p;
+ pc->p[4] = p;
+ pc->npoints = 5;
+ pc->red_curve->reset();
+ bool is_curve;
+ pc->red_curve->moveto(pc->p[0]);
+ if (pc->polylines_paraxial && !statusbar) {
+ // we are drawing horizontal/vertical lines and hit an anchor;
+ Geom::Point const origin = pc->p[0];
+ // if the previous point and the anchor are not aligned either horizontally or vertically...
+ if ((abs(p[Geom::X] - origin[Geom::X]) > 1e-9) && (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;
+ pen_set_to_nearest_horiz_vert(pc, intermed, status, false);
+ pc->red_curve->lineto(intermed);
+ }
+ pc->red_curve->lineto(p);
+ is_curve = false;
+ } else {
+ // one of the 'regular' modes
+ //SpiroLive
+ if (pc->p[1] != pc->p[0] || pc->spiro) {
+ //SpiroLive End
+ pc->red_curve->curveto(pc->p[1], p, p);
+ is_curve = true;
+ } else {
+ pc->red_curve->lineto(p);
+ is_curve = false;
+ }
+ }
+
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
+
+ if (statusbar) {
+ gchar *message = is_curve ?
+ _("<b>Curve segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path" ):
+ _("<b>Line segment</b>: angle %3.2f&#176;, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path");
+ //BSpline
+ if(pc->spiro || pc->bspline){
+ message = is_curve ?
+ _("<b>Curve segment</b>: angle %3.2f&#176;, distance %s; with <b>Shift</b> to cusp node, <b>Enter</b> to finish the path" ):
+ _("<b>Line segment</b>: angle %3.2f&#176;, distance %s; with <b>Shift</b> to cusp node, <b>Enter</b> to finish the path");
+ }
+ //BSpline End
+ spdc_pen_set_angle_distance_status_message(pc, p, 0, message);
+ }
+}
+
+static void spdc_pen_set_ctrl(PenTool *const pc, Geom::Point const p, guint const state)
+{
+ sp_canvas_item_show(pc->c1);
+ sp_canvas_item_show(pc->cl1);
+
+ if ( pc->npoints == 2 ) {
+ pc->p[1] = p;
+ sp_canvas_item_hide(pc->c0);
+ sp_canvas_item_hide(pc->cl0);
+ SP_CTRL(pc->c1)->moveto(pc->p[1]);
+ pc->cl1->setCoords(pc->p[0], pc->p[1]);
+ spdc_pen_set_angle_distance_status_message(pc, p, 0, _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle"));
+ } else if ( pc->npoints == 5 ) {
+ pc->p[4] = p;
+ sp_canvas_item_show(pc->c0);
+ sp_canvas_item_show(pc->cl0);
+ bool is_symm = false;
+ if ( ( ( pc->mode == PenTool::MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) ||
+ ( ( pc->mode == PenTool::MODE_DRAG ) && !( state & GDK_SHIFT_MASK ) ) ) {
+ Geom::Point delta = p - pc->p[3];
+ pc->p[2] = pc->p[3] - delta;
+ is_symm = true;
+ pc->red_curve->reset();
+ pc->red_curve->moveto(pc->p[0]);
+ pc->red_curve->curveto(pc->p[1], pc->p[2], pc->p[3]);
+ sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
+ }
+ SP_CTRL(pc->c0)->moveto(pc->p[2]);
+ pc->cl0 ->setCoords(pc->p[3], pc->p[2]);
+ SP_CTRL(pc->c1)->moveto(pc->p[4]);
+ pc->cl1->setCoords(pc->p[3], pc->p[4]);
+ gchar *message = is_symm ?
+ _("<b>Curve handle, symmetric</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") :
+ _("<b>Curve handle</b>: angle %3.2f&#176;, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only");
+ spdc_pen_set_angle_distance_status_message(pc, p, 3, message);
+ } else {
+ g_warning("Something bad happened - npoints is %d", pc->npoints);
+ }
+}
+
+static void spdc_pen_finish_segment(PenTool *const pc, Geom::Point const p, guint const state)
+{
+ if (pc->polylines_paraxial) {
+ pen_last_paraxial_dir = pen_next_paraxial_direction(pc, p, pc->p[0], state);
+ }
+
+ ++pc->num_clicks;
+
+ if (!pc->red_curve->is_empty()) {
+ bspline_spiro(pc,(state & GDK_SHIFT_MASK));
+ pc->green_curve->append_continuous(pc->red_curve, 0.0625);
+ SPCurve *curve = pc->red_curve->copy();
+ /// \todo fixme:
+ SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
+ curve->unref();
+ sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+
+ pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
+
+ pc->p[0] = pc->p[3];
+ pc->p[1] = pc->p[4];
+ pc->npoints = 2;
+
+ pc->red_curve->reset();
+ }
+}
+
+static void spdc_pen_finish(PenTool *const pc, gboolean const closed)
+{
+ if (pc->expecting_clicks_for_LPE > 1) {
+ // don't let the path be finished before we have collected the required number of mouse clicks
+ return;
+ }
+
+ pc->num_clicks = 0;
+ pen_disable_events(pc);
+
+ SPDesktop *const desktop = pc->desktop;
+ pc->message_context->clear();
+ desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
+
+ pc->red_curve->reset();
+ spdc_concat_colors_and_flush(pc, closed);
+ pc->sa = NULL;
+ pc->ea = NULL;
+
+ pc->npoints = 0;
+ pc->state = PenTool::POINT;
+
+ sp_canvas_item_hide(pc->c0);
+ sp_canvas_item_hide(pc->c1);
+ sp_canvas_item_hide(pc->cl0);
+ sp_canvas_item_hide(pc->cl1);
+
+ if (pc->green_anchor) {
+ pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
+ }
+
+
+ pc->desktop->canvas->endForcedFullRedraws();
+
+ pen_enable_events(pc);
+}
+
+static void pen_disable_events(PenTool *const pc) {
+ pc->events_disabled++;
+}
+
+static void pen_enable_events(PenTool *const pc) {
+ g_return_if_fail(pc->events_disabled != 0);
+
+ pc->events_disabled--;
+}
+
+void sp_pen_context_wait_for_LPE_mouse_clicks(PenTool *pc, Inkscape::LivePathEffect::EffectType effect_type,
+ unsigned int num_clicks, bool use_polylines)
+{
+ if (effect_type == Inkscape::LivePathEffect::INVALID_LPE)
+ return;
+
+ pc->waiting_LPE_type = effect_type;
+ pc->expecting_clicks_for_LPE = num_clicks;
+ pc->polylines_only = use_polylines;
+ pc->polylines_paraxial = false; // TODO: think if this is correct for all cases
+}
+
+void sp_pen_context_cancel_waiting_for_LPE(PenTool *pc)
+{
+ pc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
+ pc->expecting_clicks_for_LPE = 0;
+ sp_pen_context_set_polyline_mode(pc);
+}
+
+static int pen_next_paraxial_direction(const PenTool *const pc,
+ 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 (pc->num_clicks == 0) {
+
+ if (pc->green_curve->is_empty()) {
+ // first mouse click
+ double dist_h = fabs(pt[Geom::X] - origin[Geom::X]);
+ double dist_v = fabs(pt[Geom::Y] - origin[Geom::Y]);
+ int ret = (dist_h < dist_v) ? 1 : 0; // 0 = horizontal, 1 = vertical
+ pen_last_paraxial_dir = (state & GDK_SHIFT_MASK) ? 1 - ret : ret;
+ return pen_last_paraxial_dir;
+ } else {
+ // subsequent mouse click
+ return (state & GDK_SHIFT_MASK) ? pen_last_paraxial_dir : 1 - pen_last_paraxial_dir;
+ }
+}
+
+void pen_set_to_nearest_horiz_vert(const PenTool *const pc, Geom::Point &pt, guint const state, bool snap)
+{
+ Geom::Point const origin = pc->p[0];
+
+ int next_dir = pen_next_paraxial_direction(pc, pt, origin, state);
+
+ if (!snap) {
+ if (next_dir == 0) {
+ // line is forced to be horizontal
+ pt[Geom::Y] = origin[Geom::Y];
+ } else {
+ // line is forced to be vertical
+ pt[Geom::X] = origin[Geom::X];
+ }
+ } else {
+ // Create a horizontal or vertical constraint line
+ Inkscape::Snapper::SnapConstraint cl(origin, next_dir ? Geom::Point(0, 1) : Geom::Point(1, 0));
+
+ // Snap along the constraint line; if we didn't snap then still the constraint will be applied
+ SnapManager &m = pc->desktop->namedview->snap_manager;
+
+ Inkscape::Selection *selection = sp_desktop_selection (pc->desktop);
+ // 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(pc->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 :
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2026-05-19 21:00:26 +0000