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/*
* Modification History
*
* 2001-September-15 Jason Rohrer
* Created.
*/
#ifndef BUTTON_GL_INCLUDED
#define BUTTON_GL_INCLUDED
#include "GUIComponentGL.h"
#include "minorGems/graphics/Image.h"
#include "minorGems/graphics/openGL/SingleTextureGL.h"
#include "minorGems/ui/event/ActionListenerList.h"
#include <GL/gl.h>
/**
* A textured button for GL-based GUIs.
*
* @author Jason Rohrer
*/
class ButtonGL : public GUIComponentGL, public ActionListenerList {
public:
/**
* Constructs a button.
*
* @param inAnchorX the x position of the upper left corner
* of this component.
* @param inAnchorY the y position of the upper left corner
* of this component.
* @param inWidth the width of this component.
* @param inHeight the height of this component.
* @param inUnpressedImage the image to display
* when this button is unpressed. Must have dimensions
* that are powers of 2.
* Will be destroyed when this class is destroyed.
* @param inPressedImage the image to display
* when this button is pressed. Must have dimensions
* that are powers of 2.
* Will be destroyed when this class is destroyed.
*/
ButtonGL(
double inAnchorX, double inAnchorY, double inWidth,
double inHeight, Image *inUnpressedImage,
Image *inPressedImage );
~ButtonGL();
// override funxtions in GUIComponentGL
virtual void mouseDragged( double inX, double inY );
virtual void mousePressed( double inX, double inY );
virtual void mouseReleased( double inX, double inY );
virtual void fireRedraw();
protected:
Image *mUnpressedImage;
Image *mPressedImage;
SingleTextureGL *mUnpressedTexture;
SingleTextureGL *mPressedTexture;
SingleTextureGL *mCurrentTexture;
};
inline ButtonGL::ButtonGL(
double inAnchorX, double inAnchorY, double inWidth,
double inHeight, Image *inUnpressedImage,
Image *inPressedImage )
: GUIComponentGL( inAnchorX, inAnchorY, inWidth, inHeight ),
mUnpressedImage( inUnpressedImage ),
mPressedImage( inPressedImage ) {
mUnpressedTexture = new SingleTextureGL( mUnpressedImage );
mPressedTexture = new SingleTextureGL( mPressedImage );
mCurrentTexture = mUnpressedTexture;
}
inline ButtonGL::~ButtonGL() {
delete mUnpressedImage;
delete mPressedImage;
delete mUnpressedTexture;
delete mPressedTexture;
}
inline void ButtonGL::mouseDragged( double inX, double inY ) {
if( mCurrentTexture == mPressedTexture
&& !isInside( inX, inY ) ) {
// the mouse has been dragged outside of us, so unpress
mCurrentTexture = mUnpressedTexture;
}
}
inline void ButtonGL::mousePressed( double inX, double inY ) {
// we'll only get pressed events if the mouse is pressed on us
mCurrentTexture = mPressedTexture;
}
inline void ButtonGL::mouseReleased( double inX, double inY ) {
// always unpress on a release
mCurrentTexture = mUnpressedTexture;
if( isInside( inX, inY ) ) {
// fire an event
fireActionPerformed( this );
}
}
inline void ButtonGL::fireRedraw() {
// set our texture
mCurrentTexture->enable();
glColor3f( 1.0f, 1.0f, 1.0f );
glDisable( GL_BLEND );
glBegin( GL_QUADS ); {
glTexCoord2f( 0, 1.0f );
glVertex2d( mAnchorX, mAnchorY );
glTexCoord2f( 1.0f, 1.0f );
glVertex2d( mAnchorX + mWidth, mAnchorY );
glTexCoord2f( 1.0f, 0 );
glVertex2d( mAnchorX + mWidth, mAnchorY + mHeight );
glTexCoord2f( 0, 0 );
glVertex2d( mAnchorX, mAnchorY + mHeight );
}
glEnd();
mCurrentTexture->disable();
}
#endif
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