> On 06/10/11 11:04, Greg Ercolano wrote:
> >> However, most write-your-own-widget examples put the widget in (0,0)
> >> of the top window,
> > [..]
> > This distinction of widgets vs. windows should certainly be
> > pointed out in the "drawing" section of the docs, and this
> > section referenced from other parts of the docs where we talk
> > about deriving custom widgets.
> >
> > If I can, I'll see if I can add that.
>
> I've submitted STR#2662 to schedule this be updated in the docs:
> http://fltk.org/str.php?L2662
>
> BTW, you can derive widgets from Fl_Window if you want your
> coordinate space to be relative to 0,0.
>
> Fl_Windows can be children of windows, just like an Fl_Group,
> and unless I'm forgetting something (I don't usually use this
> technique myself), you can probably get what you want this way
> if you prefer your widget to work relative to 0,0.
>
> I recall there once was a time putting windows in windows
> didn't work well.. I think this was fixed in recent versions,
> but I can't remember the details.
>
> Here's a small example I just whipped up in 1.3.x which
> shows deriving a custom window class, and using it to create
> a window, and a window-in-a-window.
>
> It's draw() method prints the x() and y() values for the window,
> which shows the x() y() value for the actual window to be the
> window's position on the desktop, and the x()/y() values for
> the window-in-a-window to be its position on the parent window.
>
>
> #include <FL/Fl.H>
> #include <FL/Fl_Window.H>
> // Demonstrate a window's x()/y() values in draw() of a window vs. a
> window-in-a-window -erco 6/10/11
> class MyWindow : public Fl_Window {
> public:
> MyWindow(int X, int Y, const char*L=0) : Fl_Window(X,Y,L) { }
> MyWindow(int X, int Y, int W, int H, const char*L=0) :
> Fl_Window(X,Y,W,H,L) { }
> void draw() {
> Fl_Window::draw();
> printf("[%s] MyWindow::draw(): x/y = %d/%d\n", // show
> window's x()/y() values at draw() time
> label(), x(), y());
> }
> };
> int main(int argc, char **argv) {
> MyWindow win(300, 300, "MAINWIN"); // make
> a main window
> MyWindow subwin(50,50,300-100,300-100, "SUB-WIN"); // make a
> window inside the main window at 50,50
> subwin.color(FL_RED); // (make it red
> so we can see it)
> win.end();
> win.resizable(win);
> win.show(argc,argv);
> return(Fl::run());
> }
Thank you for improving the documentaion and giving this example.
And the fact that a window can be in another window is interesting, for I never
thought this can be done in fltk.
_______________________________________________
fltk mailing list
[email protected]
http://lists.easysw.com/mailman/listinfo/fltk
