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/**
* \file src/snapper.cpp
* \brief Snapper class.
*
* Authors:
* Carl Hetherington <inkscape@carlh.net>
* Diederik van Lierop <mail@diedenrezi.nl>
*
* Released under GNU GPL, read the file 'COPYING' for more information.
*/
#include "libnr/nr-values.h"
#include "sp-namedview.h"
#include "inkscape.h"
#include "desktop.h"
Inkscape::Snapper::PointType const Inkscape::Snapper::SNAPPOINT_BBOX = 0x1;
Inkscape::Snapper::PointType const Inkscape::Snapper::SNAPPOINT_NODE = 0x2;
Inkscape::Snapper::PointType const Inkscape::Snapper::SNAPPOINT_GUIDE = 0x4;
/**
* Construct new Snapper for named view.
* \param nv Named view.
* \param d Snap tolerance.
*/
Inkscape::Snapper::Snapper(SPNamedView const *nv, Geom::Coord const t) : _named_view(nv), _snap_enabled(true), _snapper_tolerance(t)
{
g_assert(_named_view != NULL);
g_assert(SP_IS_NAMEDVIEW(_named_view));
setSnapFrom(SNAPPOINT_BBOX | SNAPPOINT_NODE, true); //Snap any point. In v0.45 and earlier, this was controlled in the preferences tab
}
/**
* Set snap tolerance.
* \param d New snap tolerance (desktop coordinates)
*/
void Inkscape::Snapper::setSnapperTolerance(Geom::Coord const d)
{
_snapper_tolerance = d;
}
/**
* \return Snap tolerance (desktop coordinates); depends on current zoom so that it's always the same in screen pixels
*/
Geom::Coord Inkscape::Snapper::getSnapperTolerance() const
{
return _snapper_tolerance / SP_ACTIVE_DESKTOP->current_zoom();
}
bool Inkscape::Snapper::getSnapperAlwaysSnap() const
{
return _snapper_tolerance == 10000; //TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp
}
/**
* Turn on/off snapping of specific point types.
* \param t Point type.
* \param s true to snap to this point type, otherwise false;
*/
void Inkscape::Snapper::setSnapFrom(PointType t, bool s)
{
if (s) {
_snap_from |= t;
} else {
_snap_from &= ~t;
}
}
/**
* \param t Point type.
* \return true if snapper will snap this type of point, otherwise false.
*/
bool Inkscape::Snapper::getSnapFrom(PointType t) const
{
return (_snap_from & t);
}
/**
* \param s true to enable this snapper, otherwise false.
*/
void Inkscape::Snapper::setEnabled(bool s)
{
_snap_enabled = s;
}
/*
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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