I have a Swing app with a middlin complex set of nested layouts. (Multiple splitpanes and scrolpanes) One of the Jpanels in a ScrollPane in a SplitPane contains a list of Jpanels with various controls in them.
Every now and then when I resize the window, or re-fill it with a new set of panels, that panel goes into a flickering frenzy. Both scrollbars are displayed and needed, and the panel just starts flickering/jiggling as the controls in it slightly resize bigger and smaller.
I've even caught this in the debugger - and NONE of my code is being invoked. It's all inside the Swing/AWT code. NONE of my Swing.invokeLater calls is being invoked during this either. I don't have any custom controls or painting happening. This is the stack trace the debugger shows me when I pause the AWT EventQueue thread.
Thread [AWT-EventQueue-0] (Suspended)
X11TextRenderer.doDrawGlyphList(long, long, Region, GlyphList) line: not available [native method]
X11TextRenderer.drawGlyphList(SunGraphics2D, GlyphList) line: 62
X11TextRenderer(GlyphListPipe).drawChars(SunGraphics2D, char[], int, int, int, int) line: 86
SunGraphics2D.drawChars(char[], int, int, int, int) line: 2843
SwingUtilities2.drawChars(JComponent, Graphics, char[], int, int, int, int) line: 780
Utilities.drawTabbedText(View, Segment, int, int, Graphics, TabExpander, int, int[]) line: 170
Utilities.drawTabbedText(View, Segment, int, int, Graphics, TabExpander, int) line: 89
PlainView.drawUnselectedText(Graphics, int, int, int, int) line: 137
PlainView.drawElement(int, Element, Graphics, int, int) line: 96
PlainView.drawLine(int, Graphics, int, int) line: 65
PlainView.paint(Graphics, Shape) line: 288
BasicTextUI$RootView.paint(Graphics, Shape) line: 1422
BasicTextAreaUI(BasicTextUI).paintSafely(Graphics) line: 722
BasicTextAreaUI(BasicTextUI).paint(Graphics, JComponent) line: 869
BasicTextAreaUI(BasicTextUI).update(Graphics, JComponent) line: 848
JTextArea(JComponent).paintComponent(Graphics) line: 752
JTextArea(JComponent).paint(Graphics) line: 1029
JPanel(JComponent).paintChildren(Graphics) line: 862
JPanel(JComponent).paint(Graphics) line: 1038
JPanel(JComponent).paintChildren(Graphics) line: 862
JPanel(JComponent).paint(Graphics) line: 1038
JPanel(JComponent).paintChildren(Graphics) line: 862
JPanel(JComponent).paint(Graphics) line: 1038
JViewport(JComponent).paintChildren(Graphics) line: 862
JViewport(JComponent).paint(Graphics) line: 1038
JViewport.paint(Graphics) line: 747
JScrollPane(JComponent).paintChildren(Graphics) line: 862
JScrollPane(JComponent).paint(Graphics) line: 1038
JPanel(JComponent).paintChildren(Graphics) line: 862
JPanel(JComponent).paint(Graphics) line: 1038
JViewport(JComponent).paintChildren(Graphics) line: 862
JViewport(JComponent).paint(Graphics) line: 1038
JViewport.paint(Graphics) line: 747
JScrollPane(JComponent).paintChildren(Graphics) line: 862
JScrollPane(JComponent).paint(Graphics) line: 1038
JScrollPane(JComponent).paintToOffscreen(Graphics, int, int, int, int, int, int) line: 5124
BufferStrategyPaintManager.paint(JComponent, JComponent, Graphics, int, int, int, int) line: 278
RepaintManager.paint(JComponent, JComponent, Graphics, int, int, int, int) line: 1224
JScrollPane(JComponent)._paintImmediately(int, int, int, int) line: 5072
JScrollPane(JComponent).paintImmediately(int, int, int, int) line: 4882
RepaintManager.paintDirtyRegions(Map<Component,Rectangle>) line: 785
RepaintManager.paintDirtyRegions() line: 713
RepaintManager.seqPaintDirtyRegions() line: 693
SystemEventQueueUtilities$ComponentWorkRequest.run() line: 125
InvocationEvent.dispatch() line: 209
EventQueue.dispatchEventImpl(AWTEvent, Object) line: 641
EventQueue.access$000(EventQueue, AWTEvent, Object) line: 84
EventQueue$1.run() line: 602
EventQueue$1.run() line: 600
AccessController.doPrivileged(PrivilegedAction<T>, AccessControlContext) line: not available [native method]
AccessControlContext$1.doIntersectionPrivilege(PrivilegedAction<T>, AccessControlContext, AccessControlContext) line: 87
EventQueue.dispatchEvent(AWTEvent) line: 611
EventDispatchThread.pumpOneEventForFilters(int) line: 269
EventDispatchThread.pumpEventsForFilter(int, Conditional, EventFilter) line: 184
EventDispatchThread.pumpEventsForHierarchy(int, Conditional, Component) line: 174
EventDispatchThread.pumpEvents(int, Conditional) line: 169
EventDispatchThread.pumpEvents(Conditional) line: 161
EventDispatchThread.run() line: 122
