Cancel Button Available During Heavy Processing ?

T6 · **Joined:** Sun Oct 14, 2007 11:27 pm **Posts:** 3

Hi,

In my application I have a processing which produce a "freeze" feeling.
I can avoid this with a progressbar updated like this (freepascal code) :

Code:

    while (g_main_context_iteration (NULL, FALSE)) do 
    begin
      Fraction := I / Number_of_Channels;
      gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pProgressBarScan), Fraction);
      scan_label := PChar(' Capturing Channel #'+inttostr(I)+' ['+C_A[I]+']...');
      gtk_statusbar_push (GTK_STATUSBAR (pStatusBar), 0, scan_label);
      gtk_main_iteration;
    end;

This works fine but now I'd like to add a CANCEL button to stop the processing if needed.
However I'm unable to keep any button reachable during the operation.
Does anyone know how to proceed please ?

Thx.
T6

Micah Carrick · **Posted:** Mon Oct 15, 2007 3:01 pm

In C, we often use:

Code:

while( gtk_events_pending() ) { gtk_main_iteration(); }

T6 · **Joined:** Sun Oct 14, 2007 11:27 pm **Posts:** 3

Thanks for your reply.
I've actually seen such syntax several times. However after implementing it into my code the application still behaves on the same way and I'm unable to click anything :(
Is there something else to add with this ?
Thx.

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Cancel Button Available During Heavy Processing ?

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