I recommend either setting up a custom method or a library script to avoid redundancy.
Example:
Then on your propertyChange event handler, call the method anytime a selection change closes the dropdown [mouse selection]
# handle slection changes that are triggered by the mouse
if event.propertyName == 'selectedStringValue' and not event.source.popupVisible:
event.source.filterNextDropdown()
For the key released event handler the code would look something like this:
if event.keyCode == event.VK_ENTER or event.keyCode == event.VK_SPACE:
event.source.filterNextDropdown()
...and it's probable that you should also consider focusLost for when people click away.
...or another option would be to simply add a custom listener to detect when the dropdown menu closes, and perform the filtering actions directly from there.
Example:
# Written for the propertyChange event handler of a dropdown component
# Only runs one time at initialization
# Won't run in the designer unless preview mode is active prior to the window being opened
if event.propertyName == 'componentRunning':
from javax.swing.event import PopupMenuListener
class PopupCloseListener(PopupMenuListener):
def popupMenuCanceled(self, event):
pass # No action needed for this event
def popupMenuWillBecomeVisible(self, event):
pass # No action needed for this event
def popupMenuWillBecomeInvisible(self, event):
print event.source.selectedStringValue
# perform the filtering actions here
event.source.addPopupMenuListener(PopupCloseListener())