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/** \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 <j.b.c.engelen@utwente.nl>
* Copyright (C) Diederik van Lierop 2009 <mail@diedenrezi.nl>
*
* 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 <glibmm/i18n.h>
#include <gtk/gtk.h>
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 :
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