How to modify the PopupContainerEdit reaction on the outer mouse click

By default, the RepositoryItemPopupContainerEdit.CloseOnOuterMouseClick property allows you to specify that the PopupContainerEdit should not close the pop-up window if the user clicks within another pop-up window opened by the control placed within the pop-up Form. However, there is no way to keep the pop-up window if the user clicks within the PopupContainerEdit owner Form. This example demonstrates how to create the editor inherited from the PopupContainerEdit that does not close its pop-up Form, unless the drop-down button or Escape keyboard key is pressed.

To implement this functionality, it is necessary to create a custom PopupContainerForm descendant, and override its AlllowMouseClick method. You can put any complex logic within this method to calculate whether or not the pop-up window should be closed in a certain situation. This example simply returns the True value in, any case.

See also:
How to register a custom editor for use in the XtraGrid