Is there an event that fires when clicking the close button on a docked control

Phoenix7 Ltd

For  'useability' i hav a dock panel that autodocks various forms when a button is pressed - it fires  splotter 'opensplitter'  to reval the docked control(s).

Correspondingly by clicking the button again it undocks and closes the docked control - when the docked panel count gets to 0 the splitter closesplitter is executed to hide the empty dockpanel - all works perfectly in my scenariio (show the dockpanel, dock a control, if undocking and control empty - hide the panel)

However, if  the user clicks the close icon on the docked control - the docked control closes - but the panelcount does not decrement - such that when all the docked controls are closed in this manner there doesn't seem to be a reliable way of checking that nothing is docked and hence firing the closesplitter to hide the empty dockpanel.

Manually undocking the control works fine (by dragging with the mouse)  - control undocks and the panelcount is decremented

Using a buttton to undock works ok as well.

so - is there an event that fires when the close button is pressed on a docked control and that decrements the panelcount.?

or - is there an event that fires on close tab of the dockpanel ? both of which decrement the docked panel count (to 0 if nothing is docked)

NB - all docking controls are forms

Eugene Balabuev (LMD)

PanelCount will not be decremented because all panels are still on their corresponding places, but hidden. You can call Show method subsequently to show a panel again.

TLMDDockPanel control provides OnClose and OnCloseQuery events, which can be used to prevent panel closing or to execute some custom action.