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POSwing Popup menus are not completely painted
 

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  1. POSwing Popup menus are not completely painted
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    <p>I have this in several areas of an app I'm working on and I can see no way to replicate it outside of this app. I can't create a sscce since I can't manage to replicate this at all - This leads me to believe that it must be something caused by the parent frame / app, but I have no idea where to look.</p> <p>What I see is that part of the left hand side of popup menus are not painted. I see this behaviour with JCombobox popups as well as JPopupMenu's. I've attached a couple of images to show what I mean. most of these did work properly previously and without any changes to the code where the popupmenu's are created or displayed, this problem has spread to a lot of other places now.</p> <p>I'm not mixing heavyweight and lightweight components, as we only use Swing components and the two examples I show below are in completely different parts of the app. The first one is in a fairly simple panel with very little functionality, but the second example (JPoopupMenu) is in a very complex legacy panel. </p> <p>On both of these and other place where I see it, I'm not altering the parent's clipping region at all and in all case, these popups are constructed and displayed on the EDT. </p> <p>I know this question is rather vague, but that is because of the nature of the problem. I'll provide any requested info.</p> <p><img src="https://i.stack.imgur.com/73oGz.jpg" alt="JComboBox popup issue"> This specific case happens to be a custom combobox model, but we've seen it when using the DefaultComboBoxModel as well:</p> <pre><code>public class GroupListModel extends AbstractListModel implements ComboBoxModel{ private List&lt;groupObject&gt; groups; private groupObject selectedItem = null; public GroupListModel() { this(new ArrayList&lt;groupObject&gt;()); } public GroupListModel(List&lt;groupObject&gt; groups) { this.groups = groups; } @Override public int getSize() { return groups.size(); } @Override public Object getElementAt(int index) { if(index&gt;=groups.size()){ throw new IndexOutOfBoundsException(); } return groups.get(index); } public void setGroups(List&lt;groupObject&gt; groups){ this.groups = groups; fireContentsChanged(this, 0, groups.size()); } public void addElement(groupObject group){ groups.add(group); fireIntervalAdded(this, groups.size()-1, groups.size()-1); } public void addElement(groupObject group, int index){ groups.add(index, group); fireIntervalAdded(this, index, index+1); } @Override public void setSelectedItem(Object anItem) { if(anItem instanceof groupObject){ selectedItem = (groupObject) anItem; }else{ throw new IllegalArgumentException(); } fireContentsChanged(this, 0, groups.size()); } @Override public Object getSelectedItem() { return selectedItem; } </code></pre> <p>This is a JPopupMenu that gets displayed when you right click using the following code: <img src="https://i.stack.imgur.com/MUNve.jpg" alt="JPopupMenu paint problem"></p> <pre><code>public void mouseClicked(MouseEvent e) { if( e.getButton()==e.BUTTON3 ){ lastClickedID = tmp.getUniqueID(); lastClickedGui = (bigEventGui) gui; itmComplete.setText( completed ? ctOne.getLang("uncomplete") : ctOne.getLang("complete") ); itmComplete.setIcon( (completed ? iconFramework.getIcon( iconFramework.UNCOMPLETE_ITEM, 24, false) : iconFramework.getIcon( iconFramework.COMPLETE_ITEM, 24, false) )); popRCEvent.show(gui, e.getX(), e.getY() ); } </code></pre>
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    1. COAre you by chance mixing heavy weight (AWT) and light weight (Swing) components in the same application?
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      1. USHovercraft Full Of Eels
    2. COOr altering the parent's clipping region inappropriately? An [sscce](http://sscce.org) would help clarify things.
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      1. POSwing Popup menus are not completely painted
      1. UStrashgod
    3. COI'm not mixing heavyweight and lightweight components, as we only use Swing components. The two examples are in completely different parts of the app and I'm not altering the parent's clipping region at all. Something I forgot to mention is that these popups are created and called on the EDT. I can't create a sscce since I can't manage to replicate this at all. It must be something caused by the parent frame / app, but I have no idea where to look.
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      1. POSwing Popup menus are not completely painted
      1. USRiaan Cornelius
 

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