Where is the entry point to graphical application
lazarus / 39-Graphics

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no_shaking · 2014-05-07 12:43

I have developed a graphical application which uses a TTimer object.
However, the TTimer procedure acts as the entry point into my
application.

I wish to know what calls this procedure;

TGraphicalForm.Timer1Timer(Sender: TObject);
begin


end;

I would like to do the following

Procedure runGraphicalSimulation()
begin

   Dosomething();

   while ExitProgram = false do
   begin

       ProcinitialseVars();

       ProcSetBasevalues();

       TGraphicalForm.Timer1Timer(Sender: TObject);
    end;

   TidyUp();

end;

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Leledumbo · 2014-05-07 14:54

Welcome to event driven programming world. Actually, I'm a bit
confused with what you want, but I'll just explain how TTimer works.
Once you set Interval property and then set Enabled property to true,
a native widgetset timer is created. Usually, this is internally
implemented as a thread. The interval is then copied and and
decremented until it reaches 0, that's when TTimer.OnTimer is called.
The process is repeated as long as Enabled = true.

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Martin_fr · 2014-05-07 15:02

Menu "Project" > "Show Project Source"

It calls Application.ProcessMessages. That is the closest to that
loop. The actual "loop" is in the OS. That is ProcessMessagces IIRC is
a loop, but it does not call all the events, it calls the OS, and the
OS calls the event.

It also depends, on if it is Windows, or gtk, or qt.

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User137 · 2014-05-07 16:21

Is this what you mean, how to call an event procedure?
Code: [Select]Timer1Timer(nil);It expects a TObject parameter so it
could be nil, or just aswell Timer1Timer(Timer1);