/** \file * Pen event context implementation. */ /* * Authors: * Lauris Kaplinski <lauris@kaplinski.com> * bulia byak <buliabyak@users.sf.net> * * 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 "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/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 "libnr/nr-point-ops.h" #include "helper/units.h" #include "macros.h" #include "context-fns.h" #include "tools-switch.h" static void sp_pen_context_class_init(SPPenContextClass *klass); static void sp_pen_context_init(SPPenContext *pc); 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); 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 SPDrawContextClass *pen_parent_class; 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); static int pen_last_paraxial_dir = 0; // last used direction in horizontal/vertical mode; 0 = horizontal, 1 = vertical /** * Register SPPenContext with Gdk and return its type. */ GType 00087 sp_pen_context_get_type(void) { static GType type = 0; if (!type) { GTypeInfo info = { sizeof(SPPenContextClass), NULL, NULL, (GClassInitFunc) sp_pen_context_class_init, NULL, NULL, sizeof(SPPenContext), 4, (GInstanceInitFunc) sp_pen_context_init, NULL, /* value_table */ }; type = g_type_register_static(SP_TYPE_DRAW_CONTEXT, "SPPenContext", &info, (GTypeFlags)0); } return type; } /** * Initialize the SPPenContext vtable. */ static void 00110 sp_pen_context_class_init(SPPenContextClass *klass) { GObjectClass *object_class; SPEventContextClass *event_context_class; object_class = (GObjectClass *) klass; event_context_class = (SPEventContextClass *) klass; pen_parent_class = (SPDrawContextClass*)g_type_class_peek_parent(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 00133 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 00162 sp_pen_context_dispose(GObject *object) { SPPenContext *pc; pc = SP_PEN_CONTEXT(object); if (pc->c0) { gtk_object_destroy(GTK_OBJECT(pc->c0)); pc->c0 = NULL; } if (pc->c1) { gtk_object_destroy(GTK_OBJECT(pc->c1)); pc->c1 = NULL; } if (pc->cl0) { gtk_object_destroy(GTK_OBJECT(pc->cl0)); pc->cl0 = NULL; } if (pc->cl1) { gtk_object_destroy(GTK_OBJECT(pc->cl1)); pc->cl1 = NULL; } G_OBJECT_CLASS(pen_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 == 2 || mode == 3); pc->polylines_paraxial = (mode == 3); } /** * Callback to initialize SPPenContext object. */ static void 00205 sp_pen_context_setup(SPEventContext *ec) { SPPenContext *pc; pc = SP_PEN_CONTEXT(ec); if (((SPEventContextClass *) pen_parent_class)->setup) { ((SPEventContextClass *) pen_parent_class)->setup(ec); } /* Pen indicators */ pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE, "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL); pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE, "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL); pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL); sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f); pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL); sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f); 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")); sp_canvas_end_forced_full_redraws(pc->desktop->canvas); } /** * Finalization callback. */ static void 00262 sp_pen_context_finish(SPEventContext *ec) { SPPenContext *pc = SP_PEN_CONTEXT(ec); sp_event_context_snap_window_closed(ec, false); //TODO: Detailed implementation of the snap window; now it's simply always open if (pc->npoints != 0) { pen_cancel (pc); } if (((SPEventContextClass *) pen_parent_class)->finish) { ((SPEventContextClass *) pen_parent_class)->finish(ec); } } /** * Callback that sets key to value in pen context. */ static void 00281 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 00299 spdc_endpoint_snap(SPPenContext const *const pc, Geom::Point &p, guint const state) { if ((state & GDK_CONTROL_MASK)) { //CTRL enables angular snapping if (pc->npoints > 0) { spdc_endpoint_snap_rotation(pc, p, pc->p[0], state); } } else { if (!(state & GDK_SHIFT_MASK)) { //SHIFT disables all snapping, except the angular snapping above //After all, the user explicitely asked for angular snapping by //pressing CTRL spdc_endpoint_snap_free(pc, p, state); } } if (pc->polylines_paraxial) { // TODO: must we avoid one of the snaps in the previous case distinction in some situations? pen_set_to_nearest_horiz_vert(pc, p, state); } } /** * Snaps new node's handle relative to the new node. */ static void 00322 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 spdc_endpoint_snap_free(pc, p, 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 *) pen_parent_class)->item_handler) ret = ((SPEventContextClass *) pen_parent_class)->item_handler(ec, item, event); } return ret; } /** * Callback to handle all pen events. */ static gint 00366 sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event) { SPPenContext *const pc = SP_PEN_CONTEXT(ec); sp_event_context_snap_window_open(ec, false); //TODO: Detailed implementation of the snap window; now it's simply always open 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 *) pen_parent_class)->root_handler; if (parent_root_handler) { ret = parent_root_handler(ec, event); } } return ret; } /** * Handle mouse button press event. */ 00413 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); 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; /* Test whether we hit any anchor. */ SPDrawAnchor * const anchor = spdc_test_inside(pc, event_w); 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(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, Inkscape::SNAPSOURCE_HANDLE); } 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; if (!pc->polylines_paraxial) { // only snap the starting point if we're not in horizontal/vertical mode // because otherwise it gets shifted; TODO: why do we snap here at all?? 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); if (pc->polylines_only) { spdc_pen_finish_segment(pc, p, bevent.state); } } } pc->state = pc->polylines_only ? SP_PEN_CONTEXT_POINT : SP_PEN_CONTEXT_CONTROL; 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 (bevent.button == 3 || pc->expecting_clicks_for_LPE == 1) { // when the last click for a waiting LPE occurs we want to finish the path if (pc->npoints != 0) { 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; } } if (pc->expecting_clicks_for_LPE > 0) { --pc->expecting_clicks_for_LPE; } return ret; } /** * Handle motion_notify event. */ static gint 00592 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); if (pen_within_tolerance) { Inkscape::Preferences *prefs = Inkscape::Preferences::get(); gint const tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); if ( Geom::LInfty( event_w - pen_drag_origin_w ) < tolerance ) { return FALSE; // Do not drag if we're within tolerance from origin. } } // Once the user has moved farther than tolerance from the original location // (indicating they intend to move the object, not click), then always process the // motion notify coordinates as given (no snapping back to origin) pen_within_tolerance = false; /* Find desktop coordinates */ Geom::Point p = 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; } 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, !anchor, mevent.state); if (anchor && !pc->anchor_statusbar) { pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to close and finish the path.")); 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) { pc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Click</b> or <b>click and drag</b> to continue the path from this point.")); pc->anchor_statusbar = true; } else if (!anchor && pc->anchor_statusbar) { pc->_message_context->clear(); pc->anchor_statusbar = false; } } 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); 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 SP_PEN_CONTEXT_STOP: /* This is perfectly valid */ break; default: break; } break; default: break; } return ret; } /** * Handle mouse button release event. */ static gint 00717 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); 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; } } 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); 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: if (!pc->polylines_only) { 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); 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; } void pen_redraw_all (SPPenContext *const pc) { // green if (pc->green_bpaths) { // remove old piecewise green canvasitems while (pc->green_bpaths) { gtk_object_destroy(GTK_OBJECT(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 if (pc->p[0] != pc->p[1]) { SP_CTRL(pc->c1)->moveto(pc->p[1]); sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), 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 ); if ( cubic && (*cubic)[2] != to_2geom(pc->p[0]) ) { Geom::Point p2 = (*cubic)[2]; SP_CTRL(pc->c0)->moveto(p2); sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), 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); } } } 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); } 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()); } void pen_lastpoint_tocurve (SPPenContext *const pc) { if (pc->npoints != 5) return; Geom::CubicBezier const * cubic = dynamic_cast<Geom::CubicBezier const *>( pc->green_curve->last_segment() ); if ( cubic ) { pc->p[1] = pc->p[0] + (Geom::Point)( (*cubic)[3] - (*cubic)[2] ); } else { pc->p[1] = pc->p[0] + (1./3)*(pc->p[3] - pc->p[0]); } pen_redraw_all(pc); } void pen_lastpoint_toline (SPPenContext *const pc) { if (pc->npoints != 5) return; pc->p[1] = pc->p[0]; 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); // in px switch (get_group0_keyval (&event->key)) { case GDK_Left: // move last point left case GDK_KP_Left: case GDK_KP_4: 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_Up: // move last point up case GDK_KP_Up: case GDK_KP_8: 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_Right: // move last point right case GDK_KP_Right: case GDK_KP_6: 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_Down: // move last point down case GDK_KP_Down: case GDK_KP_2: 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_P: case GDK_p: if (MOD__SHIFT_ONLY) { sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PARALLEL, 2); ret = TRUE; } break; case GDK_C: case GDK_c: if (MOD__SHIFT_ONLY) { sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::CIRCLE_3PTS, 3); ret = TRUE; } break; case GDK_B: case GDK_b: if (MOD__SHIFT_ONLY) { sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::PERP_BISECTOR, 2); ret = TRUE; } break; case GDK_A: case GDK_a: if (MOD__SHIFT_ONLY) { sp_pen_context_wait_for_LPE_mouse_clicks(pc, Inkscape::LivePathEffect::ANGLE_BISECTOR, 3); ret = TRUE; } break; */ case GDK_U: case GDK_u: if (MOD__SHIFT_ONLY) { pen_lastpoint_tocurve(pc); ret = TRUE; } break; case GDK_L: case GDK_l: if (MOD__SHIFT_ONLY) { pen_lastpoint_toline(pc); ret = TRUE; } break; case GDK_Return: case GDK_KP_Enter: if (pc->npoints != 0) { spdc_pen_finish(pc, FALSE); ret = TRUE; } break; case GDK_Escape: if (pc->npoints != 0) { // if drawing, cancel, otherwise pass it up for deselecting pen_cancel (pc); ret = TRUE; } break; case GDK_z: case GDK_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_g: case GDK_G: if (MOD__SHIFT_ONLY) { sp_selection_to_guides(SP_EVENT_CONTEXT(pc)->desktop); ret = true; } break; case GDK_BackSpace: case GDK_Delete: case GDK_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 */ pc->red_curve->reset(); /* Destroy topmost green bpath */ if (pc->green_bpaths) { if (pc->green_bpaths->data) gtk_object_destroy(GTK_OBJECT(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<Geom::CubicBezier const *>(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->c0); sp_canvas_item_hide(pc->c1); 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); 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) { gtk_object_destroy(GTK_OBJECT(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); sp_canvas_force_full_redraw_after_interruptions(pc->desktop->canvas, 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 01219 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); } 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; draw an L-shaped path Geom::Point intermed = p; pen_set_to_nearest_horiz_vert(pc, intermed, status); pc->red_curve->lineto(intermed); pc->red_curve->lineto(p); is_curve = false; } else { // one of the 'regular' modes if (pc->p[1] != pc->p[0]) { 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°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path" ): _("<b>Line segment</b>: angle %3.2f°, distance %s; with <b>Ctrl</b> to snap angle, <b>Enter</b> to finish the path"); 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]); sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]); spdc_pen_set_angle_distance_status_message(pc, p, 0, _("<b>Curve handle</b>: angle %3.2f°, 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 == 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]); sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), pc->p[3], pc->p[2]); SP_CTRL(pc->c1)->moveto(pc->p[4]); sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[3], pc->p[4]); gchar *message = is_symm ? _("<b>Curve handle, symmetric</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only") : _("<b>Curve handle</b>: angle %3.2f°, length %s; with <b>Ctrl</b> to snap angle, with <b>Shift</b> to move this handle only"); spdc_pen_set_angle_distance_status_message(pc, p, 3, message); } else { g_warning("Something bad happened - npoints is %d", pc->npoints); } } static void 01323 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()) { 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; 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); } sp_canvas_end_forced_full_redraws(pc->desktop->canvas); 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 */ if (pc->num_clicks == 0) { // 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) { Geom::Point const &origin = pc->p[0]; int next_dir = pen_next_paraxial_direction(pc, pt, origin, state); 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]; } } /* 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:encoding=utf-8:textwidth=99 :