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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"
/**
* Construct new Snapper for named view.
* \param nv Named view.
* \param d Snap tolerance.
*/
Inkscape::Snapper::Snapper(SnapManager const *sm, Geom::Coord const t) :
_snapmanager(sm),
_snap_enabled(true),
_snapper_tolerance(std::max(t, 1.0))
{
g_assert(_snapmanager != NULL);
}
/**
* Set snap tolerance.
* \param d New snap tolerance (desktop coordinates)
*/
void Inkscape::Snapper::setSnapperTolerance(Geom::Coord const d)
{
_snapper_tolerance = std::max(d, 1.0);
}
/**
* \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
{
SPDesktop const *dt = _snapmanager->getDesktop();
double const zoom = dt ? dt->current_zoom() : 1;
return _snapper_tolerance / zoom;
}
bool Inkscape::Snapper::getSnapperAlwaysSnap() const
{
return _snapper_tolerance == 10000; //TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp
}
/**
* \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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