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POCheck when component is removed from JTable
 

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  1. POCheck when component is removed from JTable
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    <p>I have a JTable that holds several JPanels using a custom renderer/editor. The JPanel listens to another object for changes. Now when I remove the rows from the JTable the JPanel still exists in the listener list in the object so the JPanel doesn't get destroyed.</p> <p>Previously I displayed the JPanel in another JPanel so when the object got removed I could add some code to unregister the listener in its removeNotify() method.</p> <p>The removeNotify() trick doesn't work when the JPanel is in a JTable because it is constantly removed and re-added to the table's renderer/editor. I tried using addNotify() to add the JPanel as a listener, but somehow it doesn't get removed from the listener list. So how can I do this as clean as possible?</p> <p>How I add rows to the table:</p> <pre><code>public void fillTable() { DefaultTableModel model = (DefaultTableModel) table.getModel(); model.setRowCount(0); CustomPanel panel = new CustomPanel(getSomeObject()); model.addRow(new Object[]{panel}); } </code></pre> <p>How the custom panel registers as a listener:</p> <pre><code>public class CustomPanel extends JPanel implements CustomObjectListener { public CustomPanel(CustomObjet obj) { obj.addListener(this); } @Override public void CustomObjectEvent(Event evt) { handle event; } } </code></pre> <p>How the event is thrown:</p> <pre><code>public class CustomObject { ArrayList&lt;CustomObjectListener&gt; listeners = new ArrayList&lt;CustomObjectListener&gt;(); public CustomObject() { } public void addListener(CustomObjectListener listener) { listeners.add(listener); } public void removeListener(CustomObjectListener listener) { listeners.remove(listener); } public void fireEvent(Event evt) { for (CustomObjectListener listener : listeners) { listener.CustomObjectEvent(evt); } } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USsiebz0r
    1. USsiebz0r
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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      1. PTAnswer
    1. VO
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      1. POCheck when component is removed from JTable
      1. This table or related slice is empty.
      1. VTUpMod
    1. COCould you show some code?
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      1. USJonas
    2. COdont add _components_ to the model. Instead, add _data_ which is rendered/edited by custom cellRenderers/-Editors
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      1. POCheck when component is removed from JTable
      1. USkleopatra
 

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