| Losing focus on DateCellEditor [message #1776420] |
Thu, 16 November 2017 10:41  |
 Robin Welsch
Messages: 1
Registered: November 2017 |
Junior Member |
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Hello,
Things have been working fine on Windows so far, but I'm having problems with the DateCellEditor component under Linux (with GNOME 3).
The calendar window never shows up when the user requests it. Instead, I'm having this NullPointerException :
java.lang.NullPointerException
at org.eclipse.swt.widgets.DateTime.isDropped(DateTime.java:1026)
at org.eclipse.swt.widgets.DateTime.dropDownCalendar(DateTime.java:550)
at org.eclipse.swt.widgets.DateTime$5.handleEvent(DateTime.java:491)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1605)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1339)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4561)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4151)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
Specifically, the popupShell field is null, but it shouldn't be at this point.
It seems it lost focus before even showing up. I've noticed the onDispose() method is called before the exception happens, here's the stack at the breakpoint when it's nullified:
Thread [main] (Suspended (breakpoint at line 539 in DateTime))
DateTime.onDispose(Event) line: 539
DateTime$3.handleEvent(Event) line: 453
EventTable.sendEvent(Event) line: 84
Display.sendEvent(EventTable, Event) line: 5227
DateTime(Widget).sendEvent(Event) line: 1340
DateTime(Widget).sendEvent(int, Event, boolean) line: 1366
DateTime(Widget).sendEvent(int) line: 1345
DateTime(Widget).release(boolean) line: 1153
DateTime(Control).release(boolean) line: 3996
DateTime(Widget).dispose() line: 479
DateCellEditor(AbstractCellEditor).close() line: 408
DateCellEditor(AbstractCellEditor).commit(SelectionLayer$MoveDirectionEnum, boolean, boolean) line: 369
DateCellEditor(AbstractCellEditor).commit(SelectionLayer$MoveDirectionEnum, boolean) line: 356
AbstractCellEditor$InlineFocusListener.focusLost(FocusEvent) line: 502
TypedListener.handleEvent(Event) line: 144
EventTable.sendEvent(Event) line: 84
Display.sendEvent(EventTable, Event) line: 5227
DateTime(Widget).sendEvent(Event) line: 1340
DateTime(Widget).sendEvent(int, Event, boolean) line: 1366
DateTime(Widget).sendEvent(int) line: 1345
DateTime(Control).sendFocusEvent(int) line: 4069
DateTime(Control).gtk_event_after(long, long) line: 3341
DateTime(Widget).windowProc(long, long, long) line: 1986
DateTime(Control).windowProc(long, long, long) line: 5827
Display.windowProc(long, long, long) line: 5498
OS._gtk_main_do_event(long) line: not available [native method]
OS.gtk_main_do_event(long) line: 9545
Display.eventProc(long, long) line: 1275
OS._g_main_context_iteration(long, boolean) line: not available [native method]
OS.g_main_context_iteration(long, boolean) line: 2495
Display.readAndDispatch() line: 4149
PartRenderingEngine$4.run() line: 1121
Realm.runWithDefault(Realm, Runnable) line: 336
PartRenderingEngine.run(MApplicationElement, IEclipseContext) line: 1022
E4Workbench.createAndRunUI(MApplicationElement) line: 150
Workbench$5.run() line: 693
Realm.runWithDefault(Realm, Runnable) line: 336
Workbench.createAndRunWorkbench(Display, WorkbenchAdvisor) line: 610
PlatformUI.createAndRunWorkbench(Display, WorkbenchAdvisor) line: 148
I don't know what to do here, it works properly on Windows so clearly there's a problem with a Linux-specific behavior, and my own code is never involved in this.
Thanks.
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