src/display/snap-indicator.cpp

	snap-indicator.cpp revision c0730cd203da4bff902711ee9ce32513a6691c2e
/** \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
 *
 * Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.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"

namespace Inkscape {
namespace Display {

/** lifetime is measured in milliseconds
 */
SnapIndicator::SnapIndicator(SPDesktop * desktop)
    :   tempitem(NULL),
        desktop(desktop)
{
}

SnapIndicator::~SnapIndicator()
{
    // remove item that might be present
    remove_snappoint();
}

void
SnapIndicator::set_new_snappoint(Geom::Point p)
{
    remove_snappoint();

    SPCanvasItem * canvasitem = sp_canvas_item_new( sp_desktop_tempgroup (desktop),
                                                    SP_TYPE_CTRL,
                                                    "anchor", GTK_ANCHOR_CENTER,
                                                    "size", 6.0,
                                                    "stroked", TRUE,
                                                    "stroke_color", 0xf000f0ff,
                                                    "mode", SP_KNOT_MODE_XOR,
                                                    "shape", SP_KNOT_SHAPE_CROSS,
                                                    NULL );
    SP_CTRL(canvasitem)->moveto ( p );
    tempitem = desktop->add_temporary_canvasitem(canvasitem, 1000);
}

void
SnapIndicator::remove_snappoint()
{
    if (tempitem) {
        desktop->remove_temporary_canvasitem(tempitem);
        tempitem = 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 :