/** \file * Pen event context implementation. */ /* * Authors: * Lauris Kaplinski * bulia byak * Jon A. Cruz * * Copyright (C) 2000 Lauris Kaplinski * Copyright (C) 2000-2001 Ximian, Inc. * Copyright (C) 2002 Lauris Kaplinski * Copyright (C) 2004 Monash University * * Released under GNU GPL, read the file 'COPYING' for more information */ #include #include #include #include "pen-context.h" #include "sp-namedview.h" #include "sp-metrics.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 #include "helper/units.h" #include "macros.h" #include "context-fns.h" #include "tools-switch.h" #include "ui/control-manager.h" //BSpline //Incluimos #define INKSCAPE_LPE_SPIRO_C #include "live_effects/lpe-spiro.h" #include "display/curve.h" #include #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 using Inkscape::ControlManager; static void sp_pen_context_dispose(GObject *object); static void sp_pen_context_setup(SPEventContext *ec); static void sp_pen_context_finish(SPEventContext *ec); static void sp_pen_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val); static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event); static gint sp_pen_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event); static void spdc_pen_set_initial_point(SPPenContext *pc, Geom::Point const p); /* *BSpline *Added functions */ /* *Sobrecarga la función "sp_pen_context_set_polyline_mode" *Le da valor a la nueva propiedad "pc->spiro" que como se auto define indica si estamos en modo spiro *En el futuro se la dará a "pc->bspline" */ static void sp_pen_context_set_mode(SPPenContext *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 spiro_color(SPPenContext *const pc); //Guarda el valor si se ha pulsado la tecla SHIFT al continuar una curva static bool saShift = false; //Preparamos la curva roja para que se muestre según esté pulsada la tecla SHIFT static void spiro(SPPenContext *const pc, bool Shift); //Unimos todas las curvas en juego y llamamos a la función doEffect. static void spiro_build(SPPenContext *const pc); //function spiro cloned from lpe-spiro.cpp static void spiro_doEffect(SPCurve * curve); //Preparamos la curva roja para que se muestre según esté pulsada la tecla SHIFT static void bspline(SPPenContext *const pc,bool Shift); //Unimos todas las curvas en juego y llamamos a la función doEffect. static void bspline_build(SPPenContext *const pc); //function bspline cloned from lpe-bspline.cpp static void bspline_doEffect(SPCurve * curve); //BSpline end static void spdc_pen_set_subsequent_point(SPPenContext *const pc, Geom::Point const p, bool statusbar, guint status = 0); static void spdc_pen_set_ctrl(SPPenContext *pc, Geom::Point const p, guint state); static void spdc_pen_finish_segment(SPPenContext *pc, Geom::Point p, guint state); static void spdc_pen_finish(SPPenContext *pc, gboolean closed); static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent); static gint pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent); static gint pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent); static gint pen_handle_2button_press(SPPenContext *const pc, GdkEventButton const &bevent); static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event); static void spdc_reset_colors(SPPenContext *pc); static void pen_disable_events(SPPenContext *const pc); static void pen_enable_events(SPPenContext *const pc); static Geom::Point pen_drag_origin_w(0, 0); static bool pen_within_tolerance = false; static int pen_next_paraxial_direction(const SPPenContext *const pc, Geom::Point const &pt, Geom::Point const &origin, guint state); static void pen_set_to_nearest_horiz_vert(const SPPenContext *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 G_DEFINE_TYPE(SPPenContext, sp_pen_context, SP_TYPE_DRAW_CONTEXT); /** * Initialize the SPPenContext vtable. */ static void sp_pen_context_class_init(SPPenContextClass *klass) { GObjectClass *object_class; SPEventContextClass *event_context_class; object_class = (GObjectClass *) klass; event_context_class = (SPEventContextClass *) klass; object_class->dispose = sp_pen_context_dispose; event_context_class->setup = sp_pen_context_setup; event_context_class->finish = sp_pen_context_finish; event_context_class->set = sp_pen_context_set; event_context_class->root_handler = sp_pen_context_root_handler; event_context_class->item_handler = sp_pen_context_item_handler; } /** * Callback to initialize SPPenContext object. */ static void sp_pen_context_init(SPPenContext *pc) { SPEventContext *event_context = SP_EVENT_CONTEXT(pc); event_context->cursor_shape = cursor_pen_xpm; event_context->hot_x = 4; event_context->hot_y = 4; pc->npoints = 0; pc->mode = SP_PEN_CONTEXT_MODE_CLICK; pc->state = SP_PEN_CONTEXT_POINT; pc->c0 = NULL; pc->c1 = NULL; pc->cl0 = NULL; pc->cl1 = NULL; pc->events_disabled = 0; pc->num_clicks = 0; pc->waiting_LPE = NULL; pc->waiting_item = NULL; } /** * Callback to destroy the SPPenContext object's members and itself. */ static void sp_pen_context_dispose(GObject *object) { SPPenContext *pc = SP_PEN_CONTEXT(object); if (pc->c0) { sp_canvas_item_destroy(pc->c0); pc->c0 = NULL; } if (pc->c1) { sp_canvas_item_destroy(pc->c1); pc->c1 = NULL; } if (pc->cl0) { sp_canvas_item_destroy(pc->cl0); pc->cl0 = NULL; } if (pc->cl1) { sp_canvas_item_destroy(pc->cl1); pc->cl1 = NULL; } G_OBJECT_CLASS(sp_pen_context_parent_class)->dispose(object); if (pc->expecting_clicks_for_LPE > 0) { // we received too few clicks to sanely set the parameter path so we remove the LPE from the item sp_lpe_item_remove_current_path_effect(pc->waiting_item, false); } } void sp_pen_context_set_polyline_mode(SPPenContext *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 B-spline in the future //todo: merge to one function only sp_pen_context_set_mode(pc, mode); //BSpline End } //BSpline /* *.Set the mode of draw now spiro, and later b-splines */ void sp_pen_context_set_mode(SPPenContext *const pc, guint mode) { pc->spiro = (mode == 1); pc->bspline = (mode == 2); } //BSpline End /** * Callback to initialize SPPenContext object. */ static void sp_pen_context_setup(SPEventContext *ec) { SPPenContext *pc = SP_PEN_CONTEXT(ec); if (((SPEventContextClass *) sp_pen_context_parent_class)->setup) { ((SPEventContextClass *) sp_pen_context_parent_class)->setup(ec); } ControlManager &mgr = ControlManager::getManager(); // Pen indicators pc->c0 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), Inkscape::CTRL_TYPE_ADJ_HANDLE); mgr.track(pc->c0); pc->c1 = mgr.createControl(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), Inkscape::CTRL_TYPE_ADJ_HANDLE); mgr.track(pc->c1); pc->cl0 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec))); pc->cl1 = mgr.createControlLine(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec))); sp_canvas_item_hide(pc->c0); sp_canvas_item_hide(pc->c1); sp_canvas_item_hide(pc->cl0); sp_canvas_item_hide(pc->cl1); sp_event_context_read(ec, "mode"); pc->anchor_statusbar = false; sp_pen_context_set_polyline_mode(pc); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/freehand/pen/selcue")) { ec->enableSelectionCue(); } } static void pen_cancel (SPPenContext *const pc) { pc->num_clicks = 0; pc->state = SP_PEN_CONTEXT_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. */ static void sp_pen_context_finish(SPEventContext *ec) { SPPenContext *pc = SP_PEN_CONTEXT(ec); sp_event_context_discard_delayed_snap_event(ec); if (pc->npoints != 0) { pen_cancel (pc); } if (((SPEventContextClass *) sp_pen_context_parent_class)->finish) { ((SPEventContextClass *) sp_pen_context_parent_class)->finish(ec); } } /** * Callback that sets key to value in pen context. */ static void sp_pen_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val) { SPPenContext *pc = SP_PEN_CONTEXT(ec); Glib::ustring name = val->getEntryName(); if (name == "mode") { if ( val->getString() == "drag" ) { pc->mode = SP_PEN_CONTEXT_MODE_DRAG; } else { pc->mode = SP_PEN_CONTEXT_MODE_CLICK; } } } /** * Snaps new node relative to the previous node. */ static void spdc_endpoint_snap(SPPenContext 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 origin = pc->npoints > 0 ? pc->p[0] : boost::optional(); 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(SPPenContext 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 origin = pc->p[pc->npoints - 2]; spdc_endpoint_snap_free(pc, p, origin, state); } } } static gint sp_pen_context_item_handler(SPEventContext *ec, SPItem *item, GdkEvent *event) { SPPenContext *const pc = SP_PEN_CONTEXT(ec); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: ret = pen_handle_button_press(pc, event->button); break; case GDK_BUTTON_RELEASE: ret = pen_handle_button_release(pc, event->button); break; default: break; } if (!ret) { if (((SPEventContextClass *) sp_pen_context_parent_class)->item_handler) ret = ((SPEventContextClass *) sp_pen_context_parent_class)->item_handler(ec, item, event); } return ret; } /** * Callback to handle all pen events. */ static gint sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event) { SPPenContext *const pc = SP_PEN_CONTEXT(ec); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: ret = pen_handle_button_press(pc, event->button); break; case GDK_MOTION_NOTIFY: ret = pen_handle_motion_notify(pc, event->motion); break; case GDK_BUTTON_RELEASE: ret = pen_handle_button_release(pc, event->button); break; case GDK_2BUTTON_PRESS: ret = pen_handle_2button_press(pc, event->button); break; case GDK_KEY_PRESS: ret = pen_handle_key_press(pc, event); break; default: break; } if (!ret) { gint (*const parent_root_handler)(SPEventContext *, GdkEvent *) = ((SPEventContextClass *) sp_pen_context_parent_class)->root_handler; if (parent_root_handler) { ret = parent_root_handler(ec, event); } } return ret; } /** * Handle mouse button press event. */ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent) { if (pc->events_disabled) { // skip event processing if events are disabled return FALSE; } SPDrawContext * 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)); SPEventContext *event_context = SP_EVENT_CONTEXT(pc); //Test whether we hit any anchor. SPDrawAnchor * const 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) && 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 SP_PEN_CONTEXT_MODE_CLICK: // In click mode we add point on release switch (pc->state) { case SP_PEN_CONTEXT_POINT: case SP_PEN_CONTEXT_CONTROL: case SP_PEN_CONTEXT_CLOSE: break; case SP_PEN_CONTEXT_STOP: // This is allowed, if we just canceled curve pc->state = SP_PEN_CONTEXT_POINT; break; default: break; } break; case SP_PEN_CONTEXT_MODE_DRAG: switch (pc->state) { case SP_PEN_CONTEXT_STOP: // This is allowed, if we just canceled curve case SP_PEN_CONTEXT_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; 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 = SP_PEN_CONTEXT_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); } } pc->state = pc->polylines_only ? SP_PEN_CONTEXT_POINT : SP_PEN_CONTEXT_CONTROL; //BSpline //Esto evita arrastrar los manejadores ya que el punto se crea //al soltar el botón del ratón. if((pc->spiro || pc->bspline) && pc->state != SP_PEN_CONTEXT_CLOSE) pc->state = SP_PEN_CONTEXT_POINT; //BSpline End ret = TRUE; break; case SP_PEN_CONTEXT_CONTROL: g_warning("Button down in CONTROL state"); break; case SP_PEN_CONTEXT_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(SPPenContext *const pc, GdkEventMotion const &mevent) { gint ret = FALSE; SPEventContext *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 spiro_color(pc); 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 SP_PEN_CONTEXT_MODE_CLICK: switch (pc->state) { case SP_PEN_CONTEXT_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 SP_PEN_CONTEXT_CONTROL: case SP_PEN_CONTEXT_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 SP_PEN_CONTEXT_STOP: // This is perfectly valid break; default: break; } break; case SP_PEN_CONTEXT_MODE_DRAG: switch (pc->state) { case SP_PEN_CONTEXT_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, _("Click or click and drag to close and finish the path.")); }else{ pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("Click or click and drag 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, _("Click or click and drag to continue the path from this point.")); }else{ pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("Click or click and drag 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 SP_PEN_CONTEXT_CONTROL: case SP_PEN_CONTEXT_CLOSE: // Placing controls is last operation in CLOSE state // snap the handle spdc_endpoint_snap_handle(pc, p, mevent.state); //BSpline if (!pc->polylines_only && !pc->spiro && !pc->bspline) { //BSpline End 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 SP_PEN_CONTEXT_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 if ( Geom::LInfty( event_w - pen_drag_origin_w ) > tolerance || mevent.time == 0) { if(pc->spiro){ spiro(pc,(mevent.state & GDK_SHIFT_MASK)); } if(pc->bspline){ bspline(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(SPPenContext *const pc, GdkEventButton const &revent) { if (pc->events_disabled) { // skip event processing if events are disabled return FALSE; } gint ret = FALSE; SPEventContext *event_context = SP_EVENT_CONTEXT(pc); if ( revent.button == 1 && !event_context->space_panning ) { SPDrawContext *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 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 SP_PEN_CONTEXT_MODE_CLICK: switch (pc->state) { case SP_PEN_CONTEXT_POINT: if ( pc->npoints == 0 ) { // Start new thread only with button release if (anchor) { p = anchor->dp; } pc->sa = anchor; spdc_pen_set_initial_point(pc, p); } else { // Set end anchor here pc->ea = anchor; if (anchor) { p = anchor->dp; } } //BSpline if(pc->spiro){ spiro(pc,(revent.state & GDK_SHIFT_MASK)); } if(pc->bspline){ bspline(pc,(revent.state & GDK_SHIFT_MASK)); } //BSpline End pc->state = SP_PEN_CONTEXT_CONTROL; ret = TRUE; break; case SP_PEN_CONTEXT_CONTROL: // End current segment spdc_endpoint_snap(pc, p, revent.state); spdc_pen_finish_segment(pc, p, revent.state); pc->state = SP_PEN_CONTEXT_POINT; ret = TRUE; break; case SP_PEN_CONTEXT_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 = SP_PEN_CONTEXT_POINT; ret = TRUE; break; case SP_PEN_CONTEXT_STOP: // This is allowed, if we just canceled curve pc->state = SP_PEN_CONTEXT_POINT; ret = TRUE; break; default: break; } break; case SP_PEN_CONTEXT_MODE_DRAG: switch (pc->state) { case SP_PEN_CONTEXT_POINT: case SP_PEN_CONTEXT_CONTROL: spdc_endpoint_snap(pc, p, revent.state); spdc_pen_finish_segment(pc, p, revent.state); break; case SP_PEN_CONTEXT_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 SP_PEN_CONTEXT_STOP: // This is allowed, if we just cancelled curve break; default: break; } pc->state = SP_PEN_CONTEXT_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); SPEventContext *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(SPPenContext *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 (SPPenContext *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 SPCurve * WPower = new SPCurve(); Geom::D2< Geom::SBasis > SBasisWPower; float WP = 0; if (pc->p[0] != pc->p[1] && !pc->spiro /*&& !pc->bspline*/) { //BSpline End if(pc->bspline){ WPower->moveto(pc->red_curve->first_segment()->initialPoint()); WPower->lineto(pc->red_curve->first_segment()->finalPoint()); SBasisWPower = WPower->first_segment()->toSBasis(); WPower->reset(); pc->p[1] = SBasisWPower.valueAt(WP); } 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::Point p2; Geom::Curve const * last_seg = pc->green_curve->last_segment(); if (last_seg) { Geom::CubicBezier const * cubic = dynamic_cast( last_seg ); //BSpline if ( cubic && (*cubic)[2] != pc->p[0]&& !pc->spiro /*&& !pc->bspline*/ ) { //BSpline End if(pc->bspline){ WPower->moveto(last_seg->finalPoint()); WPower->lineto(last_seg->initialPoint()); SBasisWPower = WPower->first_segment()->toSBasis(); p2 = SBasisWPower.valueAt(WP); }else{ 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 if(pc->spiro){ //we redraw spiro spiro_build(pc); } if(pc->bspline){ //we redraw bspline bspline_build(pc); } //BSpline End } static void pen_lastpoint_move (SPPenContext *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 (SPPenContext *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 (SPPenContext *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; if(!pc->bspline) pc->p[1] = pc->p[0]; //Para formar una curva necesitamos un nodo symm en el "lastpoint" //de esta manera modificamos el final de la "curva_verde" para que sea symm con el pricipio de la "red_curve" if(pc->spiro){ 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( pc->green_curve->last_segment() ); //We obtain the last segment 4 points in the previous curve if ( cubic ){ A = (*cubic)[0]; B = (*cubic)[1]; C = pc->p[0] + (Geom::Point)(pc->p[0] - pc->p[1]); D = (*cubic)[3]; }else{ A = pc->green_curve->last_segment()->initialPoint(); B = pc->green_curve->last_segment()->initialPoint(); C = pc->p[0] + (Geom::Point)(pc->p[0] - pc->p[1]); 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); } } //BSpline //Para formar una recta necesitamos un nodo con manejador en el "lastpoint" //de esta manera modificamos el final de la "curva_verde" para que tenga manejador if(pc->bspline && !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); using Geom::X; using Geom::Y; SPCurve * previous = new SPCurve(); //We obtain the last segment 4 points in the previous curve A = pc->green_curve->last_segment()->initialPoint(); B = pc->green_curve->last_segment()->initialPoint(); C = pc->green_curve->last_segment()->finalPoint() + (1./3)* (Geom::Point)(pc->green_curve->last_segment()->initialPoint() - pc->green_curve->last_segment()->finalPoint()); pc->p[1] = pc->p[0] + (1./3)*(C - pc->p[0]); 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); } } //Spiro Live pen_redraw_all(pc); } static void pen_lastpoint_toline (SPPenContext *const pc) { //BSpline //Si no es bspline if (pc->npoints != 5 && !pc->bspline) return; Geom::CubicBezier const * cubic; if(pc->spiro){ 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( 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; pc->p[1] = pc->p[0] + (Geom::Point)( (*cubic)[3] - (*cubic)[2] ); } 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); } } if(!pc->bspline){ cubic = dynamic_cast( pc->green_curve->last_segment() ); if ( cubic ) { pc->p[1] = pc->p[0] + (Geom::Point)( pc->p[0] - (*cubic)[2] ); } else { pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]); } } //Para formar una curva bspline necesitamos un nodo cusp en el "lastpoint" //de esta manera modificamos el final de la "curva_verde" para que sea cusp con el pricipio de la "red_curve" //Que se quedará recta if(pc->bspline){ Geom::Point A(0,0); Geom::Point B(0,0); SPCurve * previous = new SPCurve(); //We obtain the last segment 2 points in the previous curve A = pc->green_curve->last_segment()->initialPoint(); B = pc->green_curve->last_segment()->finalPoint(); previous->moveto(A); previous->lineto(B); 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); } } pen_redraw_all(pc); } static gint pen_handle_key_press(SPPenContext *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) { // not ctrl if (MOD__ALT) { // alt if (MOD__SHIFT) pen_lastpoint_move_screen(pc, -10, 0); // shift else pen_lastpoint_move_screen(pc, -1, 0); // no shift } else { // no alt if (MOD__SHIFT) 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) { // not ctrl if (MOD__ALT) { // alt if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, 10); // shift else pen_lastpoint_move_screen(pc, 0, 1); // no shift } else { // no alt if (MOD__SHIFT) 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) { // not ctrl if (MOD__ALT) { // alt if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 10, 0); // shift else pen_lastpoint_move_screen(pc, 1, 0); // no shift } else { // no alt if (MOD__SHIFT) 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) { // not ctrl if (MOD__ALT) { // alt if (MOD__SHIFT) pen_lastpoint_move_screen(pc, 0, -10); // shift else pen_lastpoint_move_screen(pc, 0, -1); // no shift } else { // no alt if (MOD__SHIFT) 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) { 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) { 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) { 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) { 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) { pen_lastpoint_tocurve(pc); ret = TRUE; } break; case GDK_KEY_L: case GDK_KEY_l: if (MOD__SHIFT_ONLY) { 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 && 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) { 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 //BSpline if ((pc->spiro || pc->bspline) && pc->green_curve->get_segment_count()==1) { pen_cancel (pc); ret = TRUE; } //BSpline End 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(); if ( Geom::CubicBezier const * cubic = dynamic_cast(crv)) { pc->p[1] = (*cubic)[1]; } else { pc->p[1] = pc->p[0]; } Geom::Point const pt(( pc->npoints < 4 ? (Geom::Point)(crv->finalPoint()) : pc->p[3] )); pc->npoints = 2; pc->green_curve->backspace(); sp_canvas_item_hide(pc->cl0); sp_canvas_item_hide(pc->cl1); pc->state = SP_PEN_CONTEXT_POINT; spdc_pen_set_subsequent_point(pc, pt, true); pen_last_paraxial_dir = !pen_last_paraxial_dir; //BSpline if(pc->spiro || pc->bspline){ 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); pen_redraw_all(pc); } //BSpline End ret = TRUE; } break; default: break; } return ret; } static void spdc_reset_colors(SPPenContext *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(SPPenContext *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°, distance %s"). */ static void spdc_pen_set_angle_distance_status_message(SPPenContext *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]; GString *dist = SP_PX_TO_METRIC_STRING(Geom::L2(rel), desktop->namedview->getDefaultMetric()); 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 = angle_to_compass (angle); 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 spiro_color(SPPenContext *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); } //Preparamos la curva roja para que se muestre según esté pulsada la tecla SHIFT static void spiro(SPPenContext *const pc, bool Shift) { if(Shift){ if(!pc->red_curve->is_empty()){ //Creamos un nodo CUSP pc->npoints = 5; pc->p[2] = pc->p[3]; } //Continuamos la curva en modo CUSP //Guardamos el valor de inicio en cusp para que no se redibuje como SYMM if(pc->anchor_statusbar && pc->red_curve->is_empty()){ saShift = true; } }else{ //Symm nodo using Geom::X; using Geom::Y; Geom::CubicBezier const * cubic; if(pc->anchor_statusbar && pc->red_curve->is_empty()){ saShift = false; } if(!pc->red_curve->is_empty()){ //Damos valores a los puntos de la curva roja para que generen un nodo SYMM pc->npoints = 5; //Les damos valor pc->p[3] = pc->red_curve->first_segment()->finalPoint(); pc->p[0] = pc->red_curve->first_segment()->initialPoint(); pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]); pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]); pc->p[1] = Geom::Point(pc->p[1][X]+1,pc->p[1][Y]+1); pc->p[2] = Geom::Point(pc->p[2][X]+1,pc->p[2][Y]+1); pc->p[4] = pc->p[3] + (Geom::Point)( pc->p[3] - pc->p[2] ); } //Continuamos la curva en modo SPIRO if( saShift == false && pc->sa && !pc->sa->curve->is_empty() && !pc->ea && pc->green_curve->is_empty()){ cubic = dynamic_cast( pc->sa->curve->last_segment()); if (pc->sa->start) { cubic = dynamic_cast( pc->sa->curve->create_reverse()->last_segment() ); } if(cubic){ pc->p[1] = (pc->p[0] - (*cubic)[2]) + pc->p[0]; } } //Nos aseguramos que el primer nodo sea SYMM con el ultimo segmento de la curva verde if(!pc->green_curve->is_empty()){ cubic = dynamic_cast( pc->green_curve->last_segment()); if(cubic && (*cubic)[2] != (*cubic)[3]){ pc->p[1] = (pc->p[0] - (*cubic)[2]) + pc->p[0]; } //Damos valor original a la variable por si se necesita de nuevo saShift = false; } //Si cerramos sobre otra curva ponemos simetrico a esta el manejador del punto de cierre if(pc->anchor_statusbar && pc->sa && !Geom::are_near(pc->sa->dp, pc->red_curve->first_segment()->finalPoint())){ cubic = dynamic_cast( pc->sa->curve->last_segment() ); if (!pc->sa->start) { cubic = dynamic_cast( pc->sa->curve->create_reverse()->last_segment() ); } if(cubic){ pc->p[2] = (pc->p[3]-(*cubic)[2]) + pc->p[3]; } } //Lo mismpo pero cerrando sobre la curva inicial if(pc->anchor_statusbar && pc->green_anchor && pc->green_anchor->active){ cubic = dynamic_cast( pc->green_curve->first_segment() ); if(cubic){ pc->p[2] = (pc->p[3]-(*cubic)[1]) + pc->p[3]; } } } spiro_build(pc); } //Unimos todas las curvas en juego y llamamos a la función doEffect. static void spiro_build(SPPenContext *const pc) { //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(); } } //We add also the green curve 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 (curve); //Effect *spr = static_cast ( new LPEspiro(lpeobj) ); //spr->doEffect(curve); 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(); sp_canvas_item_show(pc->c1); pc->blue_curve->reset(); SP_CTRL(pc->c1)->moveto(pc->p[0]); //We hide the holders that doesn't contribute anything 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); } } //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); } //Unimos todas las curvas en juego y llamamos a la función doEffect. static void bspline(SPPenContext *const pc, bool Shift) { using Geom::X; using Geom::Y; Geom::CubicBezier const *cubic; if(Shift){ //Continuamos la curva en modo CUSP //Guardamos el valor de inicio en cusp para que no se redibuje como SYMM if(pc->anchor_statusbar && pc->red_curve->is_empty()){ SPCurve *previousCurve = new SPCurve(); if(pc->sa && !pc->sa->curve->is_empty()){ previousCurve = pc->sa->curve->copy(); if (pc->sa->start) { previousCurve = previousCurve->create_reverse(); } cubic = dynamic_cast(&*previousCurve->last_segment()); if(cubic){ SPCurve *lastSeg = new SPCurve(); lastSeg->moveto((*cubic)[0]); lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); previousCurve->backspace(); previousCurve->append_continuous(lastSeg, 0.0625); if (pc->sa->start) { previousCurve = previousCurve->create_reverse(); } pc->sa->curve->reset(); pc->sa->curve = previousCurve; } } } if(pc->anchor_statusbar && !pc->red_curve->is_empty()){ // Step B - both start and end anchored to same curve if ( pc->sa && pc->ea && ( pc->sa->curve == pc->ea->curve ) && ( ( pc->sa != pc->ea ) || pc->sa->curve->is_closed() ) ) { SPCurve * same = pc->sa->curve->copy(); if (pc->sa->start) { same = same->create_reverse(); } cubic = dynamic_cast(&*same->last_segment()); if(cubic){ SPCurve *lastSeg = new SPCurve(); lastSeg->moveto((*cubic)[0]); lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); same->backspace(); same->append_continuous(lastSeg, 0.0625); if (pc->sa->start) { same = same->create_reverse(); } pc->sa->curve->reset(); pc->sa->curve = same; } } // Step A - test, whether we ended on green anchor if ( pc->green_anchor && pc->green_anchor->active ) { // We hit green anchor, closing Green-Blue-Red SPCurve * green = pc->green_curve->copy()->create_reverse(); cubic = dynamic_cast(&*green->last_segment()); if(cubic){ SPCurve *lastSeg = new SPCurve(); lastSeg->moveto((*cubic)[0]); lastSeg->curveto((*cubic)[1],(*cubic)[3],(*cubic)[3]); green->backspace(); green->append_continuous(lastSeg, 0.0625); green = green->create_reverse(); pc->green_curve->reset(); pc->green_curve = green; } } } 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(); if(pc->green_curve->is_empty()){ pc->p[1] = pc->p[0]; }else{ cubic = dynamic_cast(&*pc->green_curve->last_segment()); if(!cubic || ((*cubic)[2] == (*cubic)[3])){ pc->p[1] = pc->p[0]; pc->p[2] = pc->p[3]; }else{ pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]); pc->p[1] = Geom::Point(pc->p[1][X]+1,pc->p[1][Y]+1); pc->p[2] = pc->p[3]; } } } }else{ //NODO CUSP formado por nodo SMOOTH //solo mobemos el manejador del nodo final de cada segmento //Es suficiente para mostrar el nodo como CUSP //Usamos 5 puntos 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(); if(pc->green_curve->is_empty()){ if(!pc->sa || (pc->sa && pc->p[0] != pc->p[1])){ pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]); pc->p[1] = Geom::Point(pc->p[1][X]+1,pc->p[1][Y]+1); } }else{ cubic = dynamic_cast(&*pc->green_curve->last_segment()); if(!cubic || ((*cubic)[2] == (*cubic)[3])) pc->p[1] = pc->p[0]; else{ SPCurve * WPower = new SPCurve(); Geom::D2< Geom::SBasis > SBasisWPower; WPower->moveto(pc->green_curve->last_segment()->finalPoint()); WPower->lineto(pc->green_curve->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); pc->p[1] = Geom::Point(pc->p[1][X]+1,pc->p[1][Y]+1); } } pc->p[2] = pc->p[3] + (1./3)*(pc->p[0] - pc->p[3]); pc->p[2] = Geom::Point(pc->p[2][X]+1,pc->p[2][Y]+1); } } bspline_build(pc); } //preparates the curves for its trasformation into BSline curves. static void bspline_build(SPPenContext *const pc) { //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(); } } //We add also the green curve 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]); if(pc->npoints == 2){ pc->red_curve->lineto(pc->p[1]); }else{ 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->get_segment_count() > 1 ){ //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 (curve); //Effect *spr = static_cast ( new LPEbspline(lpeobj) ); //spr->doEffect(curve); bspline_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 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(); //Sbasis Geom::D2< Geom::SBasis > SBasisIn; Geom::D2< Geom::SBasis > SBasisOut; Geom::D2< Geom::SBasis > SBasisEnd; Geom::D2< Geom::SBasis > SBasisHelper; //curves SPCurve * in = new SPCurve(); SPCurve * out = new SPCurve(); SPCurve * end = new SPCurve(); //Curvas temporales SPCurve *lineHelper = new SPCurve(); SPCurve *curveHelper = new SPCurve(); SPCurve *nCurve = new SPCurve(); //Puntos a usar. Ponemos todos los posibles para hacer más inteligible el código Geom::Point startNode(0,0); Geom::Point previousNode(0,0); Geom::Point node(0,0); //Geom::Point previousPointAt3(0,0); Geom::Point pointAt0(0,0); Geom::Point pointAt1(0,0); Geom::Point pointAt2(0,0); Geom::Point pointAt3(0,0); //Geom::Point nextPointAt0(0,0); Geom::Point nextPointAt1(0,0); Geom::Point nextPointAt2(0,0); Geom::Point nextPointAt3(0,0); Geom::Point endPointAt2(0,0); Geom::CubicBezier const *cubic; //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_end = path_it->end_open(); // end 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 in->moveto(curve_it1->initialPoint()); in->lineto(curve_it1->finalPoint()); out->moveto(curve_it2->initialPoint()); out->lineto(curve_it2->finalPoint()); //este no cambia. end->moveto(curve_end->initialPoint()); end->lineto(curve_end->finalPoint()); //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 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(); } SBasisIn = in->first_segment()->toSBasis(); SBasisEnd = end->first_segment()->toSBasis(); cubic = dynamic_cast(&*curve_it1); if(cubic){ pointAt1 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[1],*in->first_segment())); }else{ pointAt1 = in->first_segment()->initialPoint(); } cubic = dynamic_cast(&*curve_end); if(cubic){ endPointAt2 = SBasisEnd.valueAt(Geom::nearest_point((*cubic)[2],*end->first_segment())); }else{ endPointAt2 = end->first_segment()->finalPoint(); } lineHelper->moveto(pointAt1); lineHelper->lineto(endPointAt2); SBasisHelper = lineHelper->first_segment()->toSBasis(); lineHelper->reset(); //Guardamos el principio de la curva startNode = SBasisHelper.valueAt(0.5); //Definimos el punto de inicio original de la curva resultante node = startNode; }else{ //Guardamos el principio de la curva startNode = in->first_segment()->initialPoint(); //Definimos el punto de inicio original de la curva resultante node = startNode; } //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 cubic = dynamic_cast(&*curve_it1); if(cubic){ SBasisIn = in->first_segment()->toSBasis(); pointAt0 = (*cubic)[0]; pointAt1 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[1],*in->first_segment())); pointAt2 = SBasisIn.valueAt(Geom::nearest_point((*cubic)[2],*in->first_segment())); pointAt3 = (*cubic)[3]; }else{ pointAt0 = in->first_segment()->initialPoint(); pointAt1 = in->first_segment()->initialPoint(); pointAt2 = in->first_segment()->finalPoint(); pointAt3 = in->first_segment()->finalPoint(); } //Y hacemos lo propio con el path de salida //nextPointAt0 = curveOut.valueAt(0); cubic = dynamic_cast(&*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(); } //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 lineHelper->moveto(pointAt2); lineHelper->lineto(nextPointAt1); SBasisHelper = lineHelper->first_segment()->toSBasis(); lineHelper->reset(); //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); curveHelper->moveto(previousNode); curveHelper->curveto(pointAt1, pointAt2, node); //añadimos la curva generada a la curva pricipal nCurve->append_continuous(curveHelper, 0.0625); curveHelper->reset(); //aumentamos los valores para el siguiente paso en el bucle ++curve_it1; ++curve_it2; //Damos valor a el objeto para el path de entrada y el de salida in->reset(); in->moveto(curve_it1->initialPoint()); in->lineto(curve_it1->finalPoint()); out->reset(); if(curve_it1 != curve_end){ out->moveto(curve_it2->initialPoint()); out->lineto(curve_it2->finalPoint()); } } //Aberiguamos la ultima parte de la curva correspondiente al último segmento curveHelper->moveto(node); //Si está cerrada la curva, la cerramos sobre el valor guardado previamente //Si no finalizamos en el punto final if (path_it->closed()) { curveHelper->curveto(nextPointAt1, nextPointAt2, startNode); }else{ curveHelper->curveto(nextPointAt1, nextPointAt2, nextPointAt3); } //añadimos este último segmento nCurve->append_continuous(curveHelper, 0.0625); //y cerramos la curva if (path_it->closed()) { nCurve->closepath_current(); } curve->append(nCurve,false); nCurve->reset(); //Limpiamos in->reset(); out->reset(); end->reset(); lineHelper->reset(); curveHelper->reset(); } delete in; delete out; delete end; delete lineHelper; delete curveHelper; //Todo: remove? //delete SBasisHelper; } //BSpline end static void spdc_pen_set_subsequent_point(SPPenContext *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 ? _("Curve segment: angle %3.2f°, distance %s; with Ctrl to snap angle, Enter to finish the path" ): _("Line segment: angle %3.2f°, distance %s; with Ctrl to snap angle, Enter to finish the path"); //BSpline if(pc->spiro || pc->bspline){ message = is_curve ? _("Curve segment: angle %3.2f°, distance %s; with Shift to cusp node, Enter to finish the path" ): _("Line segment: angle %3.2f°, distance %s; with Shift to cusp node, Enter to finish the path"); } //BSpline End spdc_pen_set_angle_distance_status_message(pc, p, 0, message); } } static void spdc_pen_set_ctrl(SPPenContext *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, _("Curve handle: angle %3.2f°, length %s; with Ctrl 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 == SP_PEN_CONTEXT_MODE_CLICK ) && ( state & GDK_CONTROL_MASK ) ) || ( ( pc->mode == SP_PEN_CONTEXT_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 ? _("Curve handle, symmetric: angle %3.2f°, length %s; with Ctrl to snap angle, with Shift to move this handle only") : _("Curve handle: angle %3.2f°, length %s; with Ctrl to snap angle, with Shift to move this handle only"); 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(SPPenContext *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 if(pc->spiro){ spiro(pc, (state & GDK_SHIFT_MASK)); } if(pc->bspline){ bspline(pc, (state & GDK_SHIFT_MASK)); } //BSpline End 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(SPPenContext *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; if(pc->spiro || pc->bspline){ saShift = false; } 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 = SP_PEN_CONTEXT_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(SPPenContext *const pc) { pc->events_disabled++; } static void pen_enable_events(SPPenContext *const pc) { g_return_if_fail(pc->events_disabled != 0); pc->events_disabled--; } void sp_pen_context_wait_for_LPE_mouse_clicks(SPPenContext *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(SPPenContext *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 SPPenContext *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 SPPenContext *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 :