> Consider the following program:
------------
> public:
> MainWindow(int w, int h, char *s = 0): Window(w, h, s) {
> begin();
> menu = new PopupMenu(0, 0, w, h);
> menu->type(PopupMenu::POPUP3);
> menu->begin();
> about_item = new Item("About clock");
> exit_item = new Item("Exit clock");
> menu->end();
> menu->callback(cb_menu, this);
>
> win = new Window(100, 100);
> end();
> color(12);
> show();
> win->show();
> }
>
> };
> This window in its begin/end block first creates and defines PopupMenu (menu),
> and then it creates one subwindow (win). After compiling and running it, it
> behaves as expected, with third mouse button click on main window, menu
> appears.
I am not sure which version of fltk you are using, perhaps the previous weekly
snapshot. I just downloaded the latest weekly snapshot 5782, and the behaviour
is a little different to what you describe.
When I compile the first program, it does not create one subwindow, it creates
a top level window, the menu is functional as you say, but the subwindow is not
created. The reason the subwindow is not created , is that the constructor
used to create MainWindow::win is the top level window constructor (Window(int
w,int h,const char *) ) , instead of the subwindow constructor ( Window(int
x,int y,int w,int h,const char *) ) (see
http://www.fltk.org/doc-2.0/html/classWindow.html#a0).
In the second version of the program which you show below, the behaviour i get
is that again, MainWindow::win is created as a top level window not a
subwindow, but as for you the menu is not functional.
The reason for this it seems is that the top level window constructor includes
the command Group::current(0) which effectively end()s the begin() called
earlier. This can be seen on lines 151,152 in the file Window.cxx in the
source code.
So I guess the solution is to simply change:
win = new Window(100, 100);
to
win = new Window(x,y,100,100);
and then it doesn't matter if MainWindow::win is constructed before or after
the popup menu, they will both behave as expected.
> However, if it was subwindow that was first created, followed by menu creation
> and definition, like in the following:
>
-----------------------
>
> public:
> MainWindow(int w, int h, char *s = 0): Window(w, h, s) {
> begin();
> win = new Window(100, 100);
>
> menu = new PopupMenu(0, 0, w, h);
> menu->type(PopupMenu::POPUP3);
> menu->begin();
> about_item = new Item("About clock");
> exit_item = new Item("Exit clock");
> menu->end();
> menu->callback(cb_menu, this);
> end();
> color(12);
> show();
> win->show();
> }
>
> };
>
---------------
> then right mouse button click on main window wont bring up the menu!?
>
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