Moving a rectangle with a button click

I have been delaying asking for help for a while now but now it just seems undoable. The problem that I am stuck on is to move a rectangle graphic at the click of a button. Upon clicking the "Send" button, the ActionListener attached to the "Send" button should cause a rectangle shape to move from the top of the frame to the bottom. I would really appreciate if you guys steer me in the right direction. Thanks

I'm been trying to do something like this just recently. I'm trying to do it by scheduling a panel.repaint(). My program sets the coordinates of the image with the mouses current position.

I haven't been able to get it to work yet.

You may want to take a look at this:
ScheduledExecutorService – Java program example « pradeepwiki

I just read your post again. It seems I misunderstood. But you'll still want to use a timer or scheduling to move the object. At each period you will update the position of the object and then call panel.repaint (or whatever your painting to).

you need to create a swing Timer like:

Code:

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Timer time =  new Timer(40, this);

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Your class must implement the interface ActionListener

call your rapaint() method in your actionPerformed method.
you need a variable for your change lets say in x.

Code:

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int dx = 400;

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Code:

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        public void actionPerformed(ActionEvent arg0)
        {
            dx += 50;
            repaint();
        }

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Code:

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public void paint(Graphics g)
{
    g.drawRect(dx, 100, 50, 50);
}

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this scenario would redraw the rectangle 50 pixels to the right every 40 milliseconds.
hope it helps!

I miss read. To do this on button click you would do your dx += 50; in your button click event. I also forgot you need to start the timer:

Code:

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time.start();

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Quote:

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Originally Posted by mwr1976

Your class must implement the interface ActionListener

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Wrong. And a gentle nudge in the right direction would have been better than posting code, especially when the person asking the question hasn't posted his/her attempts at a solution.

db

Quote:

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Originally Posted by mwr1976

To do this on button click you would do your dx += 50; in your button click event.

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What's a button click event? Are you sure you're posting advice that pertains to Java?

db