/** \file * Provides a class that shows a temporary indicator on the canvas of where the snap was, and what kind of snap * * Authors: * Johan Engelen * Diederik van Lierop * * Copyright (C) Johan Engelen 2009 * Copyright (C) Diederik van Lierop 2009 * * Released under GNU GPL, read the file 'COPYING' for more information */ #include "display/snap-indicator.h" #include "desktop.h" #include "desktop-handles.h" #include "display/sodipodi-ctrl.h" #include "knot.h" #include "preferences.h" #include #include namespace Inkscape { namespace Display { SnapIndicator::SnapIndicator(SPDesktop * desktop) : _snaptarget(NULL), _snapsource(NULL), _desktop(desktop) { } SnapIndicator::~SnapIndicator() { // remove item that might be present remove_snaptarget(); remove_snapsource(); } void SnapIndicator::set_new_snaptarget(Inkscape::SnappedPoint const p) { remove_snaptarget(); g_assert(_desktop != NULL); /* Commented out for now, because this might hide any snapping bug! if (!p.getSnapped()) { return; // If we haven't snapped, then it is of no use to draw a snapindicator } */ Inkscape::Preferences *prefs = Inkscape::Preferences::get(); bool value = prefs->getBool("/options/snapindicator/value", true); if (value) { gchar *target_name = _("UNDEFINED"); switch (p.getTarget()) { case SNAPTARGET_UNDEFINED: target_name = _("UNDEFINED"); break; case SNAPTARGET_GRID: target_name = _("grid line"); break; case SNAPTARGET_GRID_INTERSECTION: target_name = _("grid intersection"); break; case SNAPTARGET_GUIDE: target_name = _("guide"); break; case SNAPTARGET_GUIDE_INTERSECTION: target_name = _("guide intersection"); break; case SNAPTARGET_GRID_GUIDE_INTERSECTION: target_name = _("grid-guide intersection"); break; case SNAPTARGET_NODE: target_name = _("node"); break; case SNAPTARGET_PATH: target_name = _("path"); break; case SNAPTARGET_PATH_INTERSECTION: target_name = _("path intersection"); break; case SNAPTARGET_BBOX_CORNER: target_name = _("bounding box corner"); break; case SNAPTARGET_BBOX_EDGE: target_name = _("bounding box side"); break; case SNAPTARGET_GRADIENT: target_name = _("gradient"); break; case SNAPTARGET_PAGE_BORDER: target_name = _("page border"); break; default: g_warning("Snap target has not yet been defined!"); break; } // std::cout << "Snapped to: " << target_name << std::endl; // Display the snap indicator (i.e. the cross) SPCanvasItem * canvasitem = NULL; if (p.getTarget() == SNAPTARGET_NODE) { canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop), SP_TYPE_CTRL, "anchor", GTK_ANCHOR_CENTER, "size", 10.0, "stroked", TRUE, "stroke_color", 0xf000f0ff, "mode", SP_KNOT_MODE_XOR, "shape", SP_KNOT_SHAPE_DIAMOND, NULL ); } else { canvasitem = sp_canvas_item_new(sp_desktop_tempgroup (_desktop), SP_TYPE_CTRL, "anchor", GTK_ANCHOR_CENTER, "size", 10.0, "stroked", TRUE, "stroke_color", 0xf000f0ff, "mode", SP_KNOT_MODE_XOR, "shape", SP_KNOT_SHAPE_CROSS, NULL ); } const int timeout_val = 1000; // TODO add preference for snap indicator timeout? SP_CTRL(canvasitem)->moveto(p.getPoint()); remove_snapsource(); // Don't set both the source and target indicators, as these will overlap _snaptarget = _desktop->add_temporary_canvasitem(canvasitem, timeout_val); // Display the tooltip GtkSettings *settings = gtk_widget_get_settings (&(_desktop->canvas->widget)); // If we set the timeout too short, then the tooltip might not show at all (most noticeable when a long snap delay is active) g_object_set(settings, "gtk-tooltip-timeout", 200, NULL); // tooltip will be shown after x msec. gtk_widget_set_tooltip_text(&(_desktop->canvas->widget), target_name); // has_tooltip will be true by now because gtk_widget_set_has_tooltip() has been called implicitly update_tooltip(); // The snap indicator will be removed automatically because it's a temporary canvas item; the tooltip // however must be removed manually, so we'll create a timer to that end Glib::signal_timeout().connect(sigc::mem_fun(*this, &SnapIndicator::remove_tooltip), timeout_val); } } void SnapIndicator::remove_snaptarget() { if (_snaptarget) { _desktop->remove_temporary_canvasitem(_snaptarget); _snaptarget = NULL; } remove_tooltip(); } void SnapIndicator::set_new_snapsource(Geom::Point const p) { remove_snapsource(); g_assert(_desktop != NULL); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); bool value = prefs->getBool("/options/snapindicator/value", true); if (value) { SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (_desktop), SP_TYPE_CTRL, "anchor", GTK_ANCHOR_CENTER, "size", 10.0, "stroked", TRUE, "stroke_color", 0xf000f0ff, "mode", SP_KNOT_MODE_XOR, "shape", SP_KNOT_SHAPE_CIRCLE, NULL ); SP_CTRL(canvasitem)->moveto(p); _snapsource = _desktop->add_temporary_canvasitem(canvasitem, 1000); } } void SnapIndicator::remove_snapsource() { if (_snapsource) { _desktop->remove_temporary_canvasitem(_snapsource); _snapsource = NULL; } } // Shows or hides the tooltip void SnapIndicator::update_tooltip() const { // When using gtk_widget_trigger_tooltip_query, the tooltip will for some reason always popup // in the upper-left corner of the screen (probably at (0,0)). As a workaround we'll create // a motion event instead, which will also trigger the tooltip gint x, y; GdkWindow *window; GdkDisplay *display = gdk_display_get_default(); window = gdk_display_get_window_at_pointer(display, &x, &y); if (window) { GdkEvent *event = gdk_event_new(GDK_MOTION_NOTIFY); event->motion.window = window; event->motion.x = x; event->motion.y = y; event->motion.is_hint = FALSE; gdk_window_get_origin(window, &x, &y); event->motion.x_root = event->motion.x + x; event->motion.y_root = event->motion.y + y; gtk_main_do_event(event); } } // Can be called either directly or through a timer bool SnapIndicator::remove_tooltip() const { gtk_widget_set_has_tooltip (&(_desktop->canvas->widget), false); gtk_widget_trigger_tooltip_query(&(_desktop->canvas->widget)); return false; } } //namespace Display } /* namespace Inkscape */ /* 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 :