CODEWITHSUNDEEP
javaswingjpanel
jaybee
jaybee

Reputation: 1925

JPanel removeAll doesn't get rid of previous components

I have a swing application in which I display images in a JPanel. If the app is unable to produce the image I want to remove the previous one from the JPanel and replace it with a JTextField and message. I can add the text field , but it's drawn on top of the previous contents, which is itself a subclass of JPanel. Here's what I have:

private void displayMessage(String message) {
  JTextField tf = new JTextField(message);
  cdPanel.removeAll();
  cdPanel.add(tf, BorderLayout.NORTH);//tried lots of variations, inc. no layout    
  cdPanel.validate();
}

How can I get cdPanel to completely redraw itself?

Upvotes: 12

Views: 17881

Answers (2)

nIcE cOw
nIcE cOw

Reputation: 24626

You can simply try calling :

cdPanel.revalidate();
cdPanel.repaint();   // This is required in some cases

instead of 

cdPanel.validate();

Upvotes: 28

trashgod
trashgod

Reputation: 205785

As you are dealing with unpredictable latency, use a SwingWorker to do the loading in the background, as shown here. The example uses pack() to resize the label to that of the image, but you may want to use a fixed-size grid and scale the images, as shown here.

Upvotes: 3

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