drawpanel.java

drawPanel.java for shape drawing program

/*
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 * and open the template in the editor.
 */

import java.awt.Color;
import java.awt.Paint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Stroke;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
 *
 * @author Diallo
 */
public class DrawPanel extends JPanel{
    MyShape shape[];
    private int shapeCount=0;
    private int shapeType;
    private MyShape currentShape;
    private Paint currentColor;
    private boolean filledShape;
    private JLabel statusLabel;
    private Stroke currentStroke;
    
  
    @Override
    public void paintComponent(Graphics g){
          Graphics2D g2=(Graphics2D) g;
          super.paintComponent(g);
                   
          for(int i=0;i<shapeCount;i++){
              currentShape=shape[i];
              if(currentShape instanceof MyOval){
                  MyOval oval=(MyOval) currentShape;
                  oval.draw(g2);
              }else if(currentShape instanceof MyRectangle){
                  MyRectangle rect=(MyRectangle) currentShape;
                  rect.draw(g2);
              }else if(currentShape instanceof MyLine){
                  MyLine line=(MyLine) currentShape;
                  line.draw(g2);
              }              
          }
    }
    
       
    public void setShapeType(int shapeType){
        this.shapeType=shapeType;                
    }
    
    public void setStroke(Stroke stroke){
        this.currentStroke=stroke;
    }
    
    public void setCurrentColor(Paint currentColor){
        this.currentColor=currentColor;       
    }
    
    public void setFilledShape(boolean filledShape){
        this.filledShape=filledShape;
    }
    
    public void clearLastShape(){
        shapeCount=(shapeCount>0)?((shapeCount==1)?(shapeCount-1):(shapeCount-2)):(shapeCount=0);        
        repaint();
    }
    
    public void clearDrawing(){
        shapeCount=0;
        repaint();
    }
    
    private class MouseClickHandler extends MouseAdapter implements MouseMotionListener{
        
        @Override
        public void mousePressed(MouseEvent event){
            if(shapeType==2){
                currentShape=new MyRectangle(event.getX(),event.getY(),event.getX(),event.getY(),
                                 currentColor,currentStroke,filledShape);
            }else if(shapeType==1){
               currentShape=new MyOval(event.getX(),event.getY(),event.getX(),event.getY(),
                                 currentColor,currentStroke,filledShape);
            }else if(shapeType==0){
               currentShape=new MyLine(event.getX(),event.getY(),event.getX(),event.getY(),currentColor,currentStroke);
            }              
            
        }
        
        @Override
        public void mouseReleased(MouseEvent event){
            currentShape.setX2(event.getX());
            currentShape.setY2(event.getY());
            shape[shapeCount++]=currentShape;
            currentShape=null;
            repaint();
        }
        
        @Override
        public void mouseMoved(MouseEvent event){
            statusLabel.setText("("+event.getX()+","+event.getY()+")");
        }
        
        @Override
        public void mouseDragged(MouseEvent event){
            currentShape.setX2(event.getX());
            currentShape.setY2(event.getY());
            repaint();
            statusLabel.setText("("+event.getX()+","+event.getY()+")");
        }
    }
    
    public DrawPanel(JLabel statusBar){
        statusLabel=statusBar;
        shape=new MyShape[100];
        shapeCount=0;
        shapeType=0;
        currentShape=null;
        currentColor=Color.BLACK;        
        setBackground(Color.WHITE);
        setVisible(true);
        addMouseListener(new MouseClickHandler());
        addMouseMotionListener(new MouseClickHandler());
        
    }

}