mirror of https://github.com/fltk/fltk
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
//
|
|
// 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:
|
|
void show(int a, char **b) {Fl_Double_Window::show(a,b);}
|
|
virtual Fl_Overlay_Window *as_overlay_window() {return this; }
|
|
};
|
|
|
|
#endif
|