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ltkscrollingcanvas.h
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C/C++ Source or Header
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1998-11-27
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2KB
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71 lines
//========================================================================
//
// LTKScrollingCanvas.h
//
// Copyright 1996 Derek B. Noonburg
//
//========================================================================
#ifndef LTKSCROLLINGCANVAS_H
#define LTKSCROLLINGCANVAS_H
#ifdef __GNUC__
#pragma interface
#endif
#include <stddef.h>
#include <X11/Xlib.h>
#include "LTKWidget.h"
//------------------------------------------------------------------------
// LTKScrollingCanvas
//------------------------------------------------------------------------
class LTKScrollingCanvas: public LTKWidget {
public:
//---------- constructor and destructor ----------
LTKScrollingCanvas(char *name1, int widgetNum1,
int realWidth1, int realHeight1,
int minWidth1, int minHeight1);
virtual ~LTKScrollingCanvas();
//---------- special access ----------
Pixmap getPixmap() { return pixmap; }
void resize(int realWidth1, int realHeight1);
int getRealWidth() { return realWidth; }
int getRealHeight() { return realHeight; }
int getMaxX() { return realWidth >= width ? realWidth - width : 0; }
int getMaxY() { return realHeight >= height ? realHeight - height : 0; }
void scroll(int x, int y);
void redrawRect(int x1, int y1, int x2, int y2);
//---------- layout ----------
virtual void layout1();
virtual void layout3();
//---------- drawing ----------
virtual void redraw();
//---------- callbacks and event handlers ----------
virtual void buttonPress(int mx, int my, int button, GBool dblClick);
virtual void buttonRelease(int mx, int my, int button, GBool click);
virtual void mouseMove(int mx, int my, int btn);
protected:
int realWidth, realHeight; // size of "real" canvas, i.e., backdrop
int minWidth, minHeight; // minimum size
int left, top; // location of window in "real" canvas
Pixmap pixmap; // the "real" canvas drawable
};
#endif