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Documentation: details about how to position a window in screens

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ManoloFLTK
2023-07-13 18:22:59 +02:00
parent 6f05af3c12
commit d9df40f99d
1 changed files with 14 additions and 0 deletions
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FL/Fl_Window.H
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@@ -159,8 +159,22 @@ public:
*/ */
Fl_Window(int w, int h, const char *title = 0); Fl_Window(int w, int h, const char *title = 0);
/** Creates a window from the given position (x, y), size (w, h) and title. /** Creates a window from the given position (x, y), size (w, h) and title.
On a multi-screen system, the values computed by
Fl::screen_xywh(int &X, int &Y, int &W, int &H, int n) can be used to
discover the coordinates of the area of screen #n.
When these screens have various scale factor
values, an \p (x, y) pair may not be enough to specify the targetted screen
for the window, because the same \p (x,y) pair can belong to several screens.
In that situation, a call to Fl_Window::screen_num(int) is to be used to identify
unambiguously the targetted screen.
\see Fl_Window(int w, int h, const char *title) \see Fl_Window(int w, int h, const char *title)
\see Fl::screen_xywh(int &X, int &Y, int &W, int &H, int n)
\note Under Wayland, it's generally not possible for the client app to control
the position of a window in the system. It's only possible to specify on what screen
should the compositor place a fullscreen window.
*/ */
Fl_Window(int x, int y, int w, int h, const char *title = 0); Fl_Window(int x, int y, int w, int h, const char *title = 0);
/** /**