67 lines
1.8 KiB
HTML
67 lines
1.8 KiB
HTML
<html>
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<body>
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<hr break>
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<h2><a name="Fl_Double_Window">class Fl_Double_Window</a></h2>
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<hr>
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<h3>Class Hierarchy</h3>
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<ul><pre>
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<a href="#Fl_Window">Fl_Window</a>
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+----<b>Fl_Double_Window</b>
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</pre></ul>
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<h3>Include Files</h3>
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<ul><pre>
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#include <FL/Fl_Double_Window.H>
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</pre></ul>
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<h3>Description</h3>
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The <tt>Fl_Double_Window</tt> class provides a double-buffered window.
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If possible this will use the X double buffering extension (Xdbe). If
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not, it will draw the window data into an off-screen pixmap, and then
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copy it to the on-screen window.
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<p>It is highly recommended that you put the following code before the
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first <tt>show()</tt> of <i>any</i> window in your program:
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<ul><pre>
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Fl::visual(FL_DOUBLE|FL_INDEX)
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</pre></ul>
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This makes sure you can use Xdbe on servers where double buffering does
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not exist for every visual.
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<h3>Methods</h3>
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<ul>
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<li><a href="#Fl_Double_Window.Fl_Double_Window">Fl_Double_Window</a>
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<li><a href="#Fl_Double_Window.~Fl_Double_Window">~Fl_Double_Window</a>
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<li><a href="#Fl_Double_Window.pixmap">pixmap</a>
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</ul>
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<h4><a name="Fl_Double_Window.Fl_Double_Window">Fl_Double_Window::Fl_Double_Window(int x, int y, int w, int h, const char *label = 0)</a></h4>
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Creates a new <tt>Fl_Double_Window</tt> widget using the given position, size, and
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label (title) string.
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<h4><a name="Fl_Double_Window.~Fl_Double_Window">virtual Fl_Double_Window::~Fl_Double_Window()</a></h4>
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The destructor <i>also deletes all the children</i>. This allows a
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whole tree to be deleted at once, without having to keep a pointer to all
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the children in the user code.
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<h4><a name="Fl_Double_Window.pixmap>ulong Fl_Double_Window::pixmap() const</a></h4>
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Returns the off-screen pixmap or back buffer. This value is zero until
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the first time <tt>flush()</tt> is called.
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</body>
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</html>
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