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// Copyright (C) 1999-2017
// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
// For conditions of distribution and use, see copyright notice in "copyright"
#ifndef __magnifier_h__
#define __magnifier_h__
#include "widget.h"
class Magnifier : public Widget {
private:
Pixmap thumbnail; // current gterm thumbnail pixmap
double crosshairSize; // size of crosshair (diameter)
double crosshairAngle; // angle of rotation (radians)
GC crosshairGC; // gc for crosshairs
int useCrosshair; // flag to render crosshair
int needsUpdate; // flag to indicate update needed
protected:
virtual void clearPixmap() =0;
private:
int updatePixmap(const BBox&); // renders image/graphics into pixmap
void update();
void invalidPixmap();
public:
Magnifier(Tcl_Interp*, Tk_Canvas, Tk_Item*);
int parse(istringstream&); // parse subcommands
// SubCommandFunctions
void crosshairCmd(int);
void getBBoxCmd();
void updateCmd(void*);
};
#endif
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