Problems with Swing JLayer (calling repaint() doesn't update my layerUI)

[doru.chiulan]

Hy folks, it's my first post here, i hope i fill find a solution for my problem because it gives me headaches.

Ok i'll try to explain my problem correctly.

What i am trying to do: Make a Animated Busy Indicator like this one from the Java Turorial (see bottom of the page)Click Here.

ok, i changed the original signature of the WaitLayerUI class like this :

class WaitLayerUI extends LayerUI<ListViewCell> implements ActionListener {}

You can see also what ListViewCell is.

class ListViewCell extends JPanel implements ListCellRenderer

The problem i have starts in this method of the WaitLayerUI

@Override
  public void applyPropertyChange(PropertyChangeEvent pce, JLayer l) {
    if ("tick".equals(pce.getPropertyName())) {
      l.repaint();
    }
  }

the repaint() method call should call the WaitLayerUI's "paint(Graphics g, JComponent j)" when a "tick" event occurs and some changes should occur (the indicator should spin).
The problem is that my paint method is called only once. and i don't understand the problem.
I have to mention that the event arrives every tick so the repaint() is called every "tick", the problem is what repaint does.
That JLayer and LayerUI are created and instantiated in this method of my ListViewCell

 public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
    WaitLayerUI layerUI = new WaitLayerUI();
    JLayer<ListViewCell> jlayer = new JLayer<ListViewCell>(this, layerUI);
}

I can't understand why repaint doesn't call the paint method every "tick"

[DarrylBurke]

To get better help sooner, post a SSCCE (Short, Self Contained, Correct (Compilable), Example) that demonstrates the problem.

the repaint() method call should call the WaitLayerUI's "paint(Graphics g, JComponent j)"

What if it does? The renderer has already done its job.

class ListViewCell extends JPanel implements ListCellRenderer

db

[doru.chiulan]

To get better help sooner, post a SSCCE (Short, Self Contained, Correct (Compilable), Example) that demonstrates the problem.


What if it does? The renderer has already done its job.
db

So the problem is that after the first paint is done, the panel is returned by the renderer to the JList as it was after the first paint and the layer is updated but not rendered again in the JList?

I will try to post a SSCCE soon.

PS. Ok seems that's the problem, i am looking now for solutions for adding an animated JLayer to a JList Cell.

[DarrylBurke]

You will need to repaint() the component that uses the renderer -- in this case, the JList.

db

[doru.chiulan]

Thank you for your help. I solved my problem :D, You can close this thread.