VGUI ImageButton

This class allows you to create buttons that are images. Depending upon what you pass in the constructor, this 'imagebutton' will change its image if your mouse hovers over it, or you click on it, and then change back when your mouse moves away from it, or you finish clicking.

class ImageButton : public vgui::ImagePanel
{
private:
	DECLARE_CLASS_SIMPLE( ImageButton, vgui::ImagePanel );
	char command[32]; // The command when it is clicked on
	vgui::IImage *i_normalImage; // The image when the mouse isn't over it, and its not being clicked
	vgui::IImage *i_mouseOverImage; // The image that appears as when the mouse is hovering over it
	vgui::IImage *i_mouseClickImage; // The image that appears while the mouse is clicking
	char m_normalImage[32];
	char m_mouseOverImage[32];
	char m_mouseClickImage[32];

	bool hasCommand; // If this is to act as a button
	bool hasMouseOverImage; // If this changes images when the mouse is hovering over it
	bool hasMouseClickImage; // If this changes images when the mouse is clicking it

	virtual void SetImage( vgui::IImage *image ) //Private because this really shouldnt be changed
	{
		BaseClass::SetImage( image );
	}

public:
	ImageButton( Panel *parent, const char *panelName, const char *normalImage, const char *mouseOverImage = NULL, const char *mouseClickImage = NULL, const char *pCmd=NULL ) : vgui::ImagePanel( parent, panelName ) 
	{
		if ( pCmd != NULL )
		{
			Q_strcpy( command, pCmd );
			hasCommand = true;
		}
		else
			hasCommand = false;

		Q_strcpy( m_normalImage, normalImage );
		i_normalImage = vgui::scheme()->GetImage( m_normalImage, false );

		if ( mouseOverImage != NULL )
		{
			Q_strcpy( m_mouseOverImage, mouseOverImage );
			i_mouseOverImage = vgui::scheme()->GetImage( m_mouseOverImage, false );
			hasMouseOverImage = true;
		}
		else
			hasMouseOverImage = false;

		if ( mouseClickImage != NULL )
		{
			Q_strcpy( m_mouseClickImage, mouseClickImage );
			i_mouseClickImage = vgui::scheme()->GetImage( m_mouseClickImage, false );
			hasMouseClickImage = true;
		}
		else
			hasMouseClickImage = false;

		SetNormalImage();
	}

        // When the mouse hovers over this panel, change images
	virtual void OnCursorEntered()
	{
		if ( hasMouseOverImage )
			SetMouseOverImage();
	}

        // When the mouse leaves this panel, change back
	virtual void OnCursorExited()
	{
		if ( hasMouseOverImage )
			SetNormalImage();
	}

	virtual void OnMouseReleased( vgui::MouseCode code )
	 {
		 Panel *parentPanel = GetParent();
		 parentPanel->OnCommand( command );

		 if ( ( code == MOUSE_LEFT ) && hasMouseClickImage )
			SetNormalImage();
	 }

	 virtual void OnMousePressed( vgui::MouseCode code )
	 {
		if ( ( code == MOUSE_LEFT ) && hasMouseClickImage )
			SetMouseClickImage();
	 }

	void SetNormalImage( void )
	{
		SetImage(i_normalImage);
		Repaint();
	}

	void SetMouseOverImage( void )
	{
		SetImage(i_mouseOverImage);
		Repaint();
	}

};