(SOLVED) About execution order for resize, move and show a hidden widget

[tonnot]

Sometimes I have this problem ....
I have this code to creat a custom widget:

A_panel * my_class;    
 my_classs = new a_panel(title, parent, sizable, modal);
 a_panel->resize(parent->width()*float(tam_100_or_0)/100, parent->height()*float(tam_100_or_0)/100); 
 a_panel->w_center_on window(w_original,w_dest); 
// (w_original is or the a_panel itself or a dialog that owns it , w_dest is the main window or a dialog) (they are properly determined).
 a_panel->setVisible(true);

A_panel * my_class;    
 my_classs = new a_panel(title, parent, sizable, modal);
 a_panel->resize(parent->width()*float(tam_100_or_0)/100, parent->height()*float(tam_100_or_0)/100); 
 a_panel->w_center_on window(w_original,w_dest); 
// (w_original is or the a_panel itself or a dialog that owns it , w_dest is the main window or a dialog) (they are properly determined).
 a_panel->setVisible(true);

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Ok, the w_center_on_window( QWidget* widget_dest, QWidget * widget) :

widget->move((widget_dest->width()-widget->width())/2, (widget_dest->height()-widget->height())/2);

widget->move((widget_dest->width()-widget->width())/2, (widget_dest->height()-widget->height())/2);

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Ok, a_panel is hidden until I show it (A_panel->setvisible(true));
The centered of widget using w_center_on_window does not work. This is because the widget is not visible ?
If I change the order, it works (but I see a fast but annoying screenshot....
a_panel->setVisible(true);[/CODE]
a_panel->w_center_on window();

Any help ? Thanks.
Ups, excuse me ............

If the widget is visible when it is being resized, it receives a resize event (resizeEvent()) immediately. If the widget is not currently visible, it is guaranteed to receive an event before it is shown.

[wysota]

If a widget was never shown, it won't "resize" nor "move". Changes will only be scheduled, not executed. If you are interested in the order itself then look into Qt source code, I would assume it uses setGeometry() which would resize and move at the same time.