[Lazarus] TStringGrid and cancelling a modal form

zeljko zeljko at holobit.net
Tue Mar 13 08:46:44 CET 2018

On 03/12/2018 08:05 PM, Mark Morgan Lloyd via Lazarus wrote:
> 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:
>> Hello,
>> 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).

So, yes, seem that grid expects mouseup

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