1999-01-13 22:28:54 +03:00
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<HTML><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>
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<PRE>
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<A href=Fl_Window.html#Fl_Window>Fl_Window</A>
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1998-12-29 17:21:17 +03:00
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1999-01-13 22:28:54 +03:00
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+----<B>Fl_Double_Window</B>
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</PRE>
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</UL>
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<H3>Include Files</H3>
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<UL>
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<PRE>
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#include <FL/Fl_Double_Window.H>
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</PRE>
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</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: </P>
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<UL>
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<PRE>
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1998-12-29 17:21:17 +03:00
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Fl::visual(FL_DOUBLE|FL_INDEX)
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1999-01-13 22:28:54 +03:00
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</PRE>
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</UL>
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This makes sure you can use Xdbe on servers where double buffering
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does 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></LI>
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<LI><A href=#Fl_Double_Window.~Fl_Double_Window>~Fl_Double_Window</A></LI>
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<LI><A href=#Fl_Double_Window.pixmap>pixmap</A></LI>
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</UL>
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<H4><A name=Fl_Double_Window.Fl_Double_Window>
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Fl_Double_Window::Fl_Double_Window(int x, int y, int w, int h, const
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char *label = 0)</A></H4>
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Creates a new <TT>Fl_Double_Window</TT> widget using the given
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position, size, and label (title) string.
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<H4><A name=Fl_Double_Window.~Fl_Double_Window>virtual
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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
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all the children in the user code.
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2001-05-06 20:25:05 +04:00
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<H4><A name="Fl_Double_Window.pixmap">ulong Fl_Double_Window::pixmap() const</a></h4>
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1998-12-29 17:21:17 +03:00
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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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1999-01-13 22:28:54 +03:00
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</BODY></HTML>
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