1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
//
// Overlay window header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
/* \file
Fl_Overlay_Window class . */
#ifndef Fl_Overlay_Window_H
#define Fl_Overlay_Window_H
#include "Fl_Double_Window.H"
/**
This window provides double buffering and also the ability to draw the
"overlay" which is another picture placed on top of the main image. The
overlay is designed to be a rapidly-changing but simple graphic such as
a mouse selection box. Fl_Overlay_Window uses the overlay
planes provided by your graphics hardware if they are available.
<P>If no hardware support is found the overlay is simulated by drawing
directly into the on-screen copy of the double-buffered window, and
"erased" by copying the backbuffer over it again. This means the
overlay will blink if you change the image in the window.
*/
class FL_EXPORT Fl_Overlay_Window : public Fl_Double_Window {
#ifndef FL_DOXYGEN
friend class _Fl_Overlay;
friend class Fl_Window_Driver;
#endif
public:
/**
You must subclass Fl_Overlay_Window and provide this method.
It is just like a draw() method, except it draws the overlay.
The overlay will have already been "cleared" when this is called. You
can use any of the routines described in <FL/fl_draw.H>.
*/
virtual void draw_overlay() = 0;
private:
Fl_Window *overlay_;
public:
void show();
void hide();
void flush();
void resize(int,int,int,int);
~Fl_Overlay_Window();
/** Returns non-zero if there's hardware overlay support */
int can_do_overlay();
void redraw_overlay();
protected:
/**
See Fl_Overlay_Window::Fl_Overlay_Window(int X, int Y, int W, int H, const char *l=0)
*/
Fl_Overlay_Window(int W, int H, const char *l=0);
/**
Creates a new Fl_Overlay_Window widget using the given
position, size, and label (title) string. If the
positions (x,y) are not given, then the window manager
will choose them.
*/
Fl_Overlay_Window(int X, int Y, int W, int H, const char *l=0);
public:
/** Same as Fl_Window::show(int a, char **b) */
void show(int a, char **b) {Fl_Double_Window::show(a,b);}
Fl_Overlay_Window *as_overlay_window() {return this; }
};
#endif
|
