Bug #3071: A NPE is thrown when Alt-Tab while COMBO-BOX drop down active - User Interface - Golden Code Redmine

Bug #3071

Bug #2677: fix drawing and functional differences between P2J GUI and 4GL GUI

A NPE is thrown when Alt-Tab while COMBO-BOX drop down active

Added by Hynek Cihlar over 10 years ago. Updated over 9 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Hynek Cihlar

Target version:

FWD - Cleanup and Stabilization for GUI

Start date:

Due date:

% Done:

100%

billable:

vendor_id:

GCD

case_num:

version_reported:

version_resolved:

reviewer:

production:

env_name:

topics:

History

#1 Updated by Hynek Cihlar over 10 years ago

This can be reproduced in current trunk.

The steps:

Open COMBO-BOX drop down by clicking into the widget.
Press Alt-tab.
An NPE is thrown, see below for the call stack.

Thread [main] (Suspended (exception NullPointerException))    
    ThinClient.invokeTriggers(Widget, Widget, long, int, boolean, Integer, Integer) line: 16770    
    ThinClient.invokeTriggers(Widget, Widget, int, boolean) line: 16639    
    ThinClient.processProgressEvent(Event) line: 16217    
    FocusManager.focusChange(Widget, boolean, boolean) line: 1388    
    ThinClient.nextTabStop(Widget) line: 18350    
    ComboBoxGuiImpl(ComboBox<O>).processKeyEvent(KeyInput) line: 505    
    ComboBoxGuiImpl.processKeyEvent(KeyInput) line: 494    
    ComboBox$1.run() line: 1369    
    ThinClient.eventBracket(boolean, Runnable) line: 14272    
    ThinClient.eventDrawingBracket(Widget<?>, boolean, boolean, Runnable) line: 14213    
    ThinClient.independentEventDrawingBracket(Widget, Runnable) line: 14086    
    ComboBoxGuiImpl(ComboBox<O>).processSystemKey(KeyInput) line: 1364    
    ComboBoxGuiImpl.processFocusMoveKey(KeyInput) line: 660    
    ComboBoxGuiImpl.postprocessDropDown() line: 940    
    ComboBoxGuiImpl(ComboBox<O>).activate() line: 1153

The cause seems to be in FocusManager. It must be made aware of the overlay windows when calculating the next focused widget on TAB.