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How do I add a label

Posted on 2004-04-04
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Last Modified: 2010-03-31
How do I add a label to a canvas and move the label with the mouse on every mouseDragged event.
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Question by:amba2004
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5 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 10753656
label.setPosition(me.getX(), me.getY()); // 'me' is the MouseEvent
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LVL 92

Expert Comment

by:objects
ID: 10753660
Use a null layout, and set the label location in your mouseDragged.

label.setLocation(event.getX(), event.getY());
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LVL 16

Expert Comment

by:gnoon
ID: 10754832
>How do I add a label to a canvas
You *cannot* add Label to a Canvas since Canvas is not a Container.
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Accepted Solution

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gnoon earned 100 total points
ID: 10755069
In you need Canvas anyway, this example can tells you how to do work around.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Frm extends JFrame {

    public Frm() {
        super("");
        Container c = getContentPane();
        c.setLayout(new BorderLayout());
        setSize(400,400);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        MyCanvas cv = new MyCanvas();
        c.add(cv);
    }

    public static void main(String[] args) {
        Frm f1 = new Frm();
        f1.show();
    }
}

class MyCanvas extends Canvas implements MouseMotionListener {
    int x = 0;
    int y = 10;
    public MyCanvas() {
        addMouseMotionListener(this);
    }
    public void paint(Graphics g) {
        g.setColor(Color.black);
        g.drawString("Label",x,y);
    }
    public void setXY(int x,int y) {
        this.x = x;
        this.y = y;
        repaint();
    }
    public void mouseDragged(MouseEvent e){
        setXY(e.getX(),e.getY());
    }
    public void mouseMoved(MouseEvent e) {}
}
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LVL 16

Expert Comment

by:gnoon
ID: 10771234
:)
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