On 12/03/18 17:45, José Mejuto via Lazarus wrote:
El 12/03/2018 a las 18:25, Mark Morgan Lloyd via Lazarus escribió:>

On the main form I've got (a tabbed notebook containing multiple > instances of) a TStringGrid. The OnSelection event invokes a modal form > (containing nothing of significant complexity) with OK and Cancel > buttons, and stripped down looks like this:
Just for testing the OnSelection is raised by mouse click ? If the answer is yes, try to click the cell and keep the mouse button pressed. If the form appears the grid is still waiting for a MOUSE_UP (thinking you are holding MOUSE_DOWN to perform a selection) and the modal form has its own queue, so MOUSE_UP never arrives.

Yes, the modal form appears while the mouse button is held down (for both GTK2 and Qt).

Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

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