d7b88a3bcc
Revision 1. git-svn-id: file:///fltk/svn/fltk/trunk@219 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
58 lines
1.8 KiB
HTML
58 lines
1.8 KiB
HTML
<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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+----<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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Fl::visual(FL_DOUBLE|FL_INDEX)
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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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<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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">
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</H4>
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</BODY></HTML> |