On Wed, 26 Oct 2016 09:49:44 +0200 LacaK via Lazarus <lazarus@lists.lazarus-ide.org> wrote:
> >>> ShowModal() for a modal form will call it. >[...] > I did test in Delphi and Delphi seems also perform synchronize upon > ShowModal Yes. > > Nowhere is it stated or guaranteed that synchronisation cannot happen > > in a GUI event > > handler. > > But cann't happen if nobody calls ProcessMessages or CheckSynchronize > explicitly. > So if user code is executed in event handler then this execution cann't > be interrupted by thread waiting for "synchronization" Yes. Unless you call something that does call HandleMessages/ProcessMessages or CheckSynchronize. > > Any code at any time can call the GUI message loop. A modal form is > > just one instance. > > ModalForm is IMO one example but may be alone in LCL ... as there are no > more controls which do same, does not ? The dialogs like TOpenDialog and ShowMessage call it. Another example is reading the Clipboard on gtk and retrieving files in TShellTreeView. Mattias -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus-ide.org http://lists.lazarus-ide.org/listinfo/lazarus
