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#ifndef CANVAS_AXONOMGRID_H
#define CANVAS_AXONOMGRID_H
/*
* Authors:
* Johan Engelen <j.b.c.engelen@alumnus.utwente.nl>
*
* Copyright (C) 2006-2012 Authors
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "line-snapper.h"
#include "canvas-grid.h"
class SPCanvasBuf;
class SPDesktop;
struct SPNamedView;
namespace Inkscape {
namespace XML {
class Node;
};
class CanvasAxonomGrid : public CanvasGrid {
public:
CanvasAxonomGrid(SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc);
virtual ~CanvasAxonomGrid();
void Update (Geom::Affine const &affine, unsigned int flags);
void Render (SPCanvasBuf *buf);
void readRepr();
void onReprAttrChanged (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive);
double lengthy; /**< The lengths of the primary y-axis */
double angle_deg[3]; /**< Angle of each axis (note that angle[2] == 0) */
double angle_rad[3]; /**< Angle of each axis (note that angle[2] == 0) */
double tan_angle[3]; /**< tan(angle[.]) */
bool scaled; /**< Whether the grid is in scaled mode */
protected:
friend class CanvasAxonomGridSnapper;
Geom::Point ow; /**< Transformed origin by the affine for the zoom */
double lyw; /**< Transformed length y by the affine for the zoom */
double lxw_x;
double lxw_z;
double spacing_ylines;
Geom::Point sw; /**< the scaling factors of the affine transform */
virtual Gtk::Widget * newSpecificWidget();
private:
CanvasAxonomGrid(const CanvasAxonomGrid&);
CanvasAxonomGrid& operator=(const CanvasAxonomGrid&);
void updateWidgets();
};
class CanvasAxonomGridSnapper : public LineSnapper
{
public:
CanvasAxonomGridSnapper(CanvasAxonomGrid *grid, SnapManager *sm, Geom::Coord const d);
bool ThisSnapperMightSnap() const;
Geom::Coord getSnapperTolerance() const; //returns the tolerance of the snapper in screen pixels (i.e. independent of zoom)
bool getSnapperAlwaysSnap() const; //if true, then the snapper will always snap, regardless of its tolerance
private:
LineList _getSnapLines(Geom::Point const &p) const;
void _addSnappedLine(IntermSnapResults &isr, Geom::Point const snapped_point, Geom::Coord const snapped_distance, SnapSourceType const &source, long source_num, Geom::Point const normal_to_line, const Geom::Point point_on_line) const;
void _addSnappedPoint(IntermSnapResults &isr, Geom::Point const snapped_point, Geom::Coord const snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const;
void _addSnappedLinePerpendicularly(IntermSnapResults &isr, Geom::Point const snapped_point, Geom::Coord const snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const;
CanvasAxonomGrid *grid;
};
}; //namespace Inkscape
#endif
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