~ubuntu-branches/ubuntu/oneiric/tuxguitar/oneiric

package org.herac.tuxguitar.gui.editors.tab;

 

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.graphics.Device;

import org.eclipse.swt.graphics.Image;

import org.herac.tuxguitar.gui.editors.TGPainter;

 

public class TGMeasureBuffer {

        

        private Device device;

        

        private Image buffer;

        

        private TGPainter painter;

        

        private int width;

        

        private int height;

        

        public TGMeasureBuffer(Device device){

                this.device = device;

        }

        

        public void makeBuffer(int width,int height,Color background){

                this.dispose();

                this.buffer = new Image(this.device,width,height);

                this.width = width;

                this.height = height;

                this.fillBuffer(background);

        }

        

        private void fillBuffer(Color background){

                getPainter().setBackground(background);

                getPainter().initPath(TGPainter.PATH_FILL);

                getPainter().addRectangle(0,0,this.width,this.height);

                getPainter().closePath();

        }

        

        public TGPainter getPainter(){

                if(this.painter == null || this.painter.getGC().isDisposed()){

                        this.painter = new TGPainter(this.buffer);

                }

                return this.painter;

        }

        

        public void paintImage(TGPainter painter,int x,int y,int srcY){

                painter.drawImage(this.buffer,0,srcY, this.width, (this.height - srcY), x, (y + srcY), this.width, (this.height - srcY));

        }

        

        public Image getImage(){

                return this.buffer;

        }

        

        public void dispose(){

                if(this.painter != null && !this.painter.getGC().isDisposed()){

                        this.painter.dispose();

                }

                if(this.buffer != null && !this.buffer.isDisposed()){

                        this.buffer.dispose();

                }

        }

        

        public boolean isDisposed(){

                return (this.buffer == null || this.buffer.isDisposed());

        }

}