CODEWITHSUNDEEP
java
Par Whale
Par Whale

Reputation: 23

Java send parameter to method paint

in my class draw Shape i want to send parameter to method paint like

 g.drawRect (a, b, 200, 200);

how can i implement my code

class MyCanvas extends JComponent {

public void paint(Graphics g) {
    g.drawRect (10, 10, 200, 200);  
  }
}

public class drawShape {

  public drawShape(){
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 300, 300);
    window.getContentPane().add(new MyCanvas());
    window.setVisible(true);
  }
}

Upvotes: 0

Views: 1894

Answers (1)

krzydyn
krzydyn

Reputation: 1032

The method paint is called from EDT every time the component needs to be repainted. And parameters of drawing should be considered as the properties of the MyCanvas. For example:

class MyCanvas extends JComponent {
    int a,b;
    public void setProps(int a, int b) {
        this.a=a; this.b=b;
        repaint();//mark this component to be repainted
    }
    public void paint(Graphics g) {
        super.paint(g);
        g.drawRect (a, b, 200, 200);
    }

  static public void main(String args[]){
    JFrame window = new JFrame();
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setBounds(30, 30, 300, 300);
    MyCanvas canvas=new MyCanvas();
    canvas.setProps(20,40);
    window.getContentPane().add(canvas);
    window.setVisible(true);
  }
}

Upvotes: 3

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