On 14.06.2011, at 17:18, asif saeed wrote:
> Finally, the following code worked. Can you tell me why?
>
> int main(int argc, char **argv)
> {
> // Fl_Group::current(NULL);
> // Fl_Window *w = new Fl_Window(0,0,0,0);
>
> Fl_Button *button1 = new Fl_Button(2,2,80,40,"Hello");
>
> Fl_Group *flow_panel = new Fl_Group(2,2,100,100);
> Fl_Group::current(flow_panel);
> flow_panel->begin();
> flow_panel->add(button1);
> flow_panel->end();
Calling end() makes the parent of flow_panel the "current" group. Since there
is no parent, the current group is null, and newly created windows are top
level windows.
> Fl_Window *window = new Fl_Window(2,2,300,300);
> Fl_Group::current(window);
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