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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 2008 <j.b.c.engelen@utwente.nl>
* Copyright (C) Diederik van Lierop 2008 <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"
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) {
// TODO add many different kinds of snap indicator :-)
// For this we should use p->getTarget() to find out what has snapped
// and adjust the shape of the snapindicator accordingly, e.g. a cross
// when snapping to an intersection, a circle when snapping to a node, etc.
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_CROSS,
NULL );
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, 1000); // TODO add preference for snap indicator timeout
}
}
void
SnapIndicator::remove_snaptarget()
{
if (_snaptarget) {
_desktop->remove_temporary_canvasitem(_snaptarget);
_snaptarget = NULL;
}
}
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_DIAMOND,
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;
}
}
} //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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