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<HTML><BODY>
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<H2><A name=Fl_Double_Window>class Fl_Double_Window</A></H2>
<HR>
<H3>Class Hierarchy</H3>
<UL>
<PRE>
<A href=Fl_Window.html#Fl_Window>Fl_Window</A>
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+----<B>Fl_Double_Window</B>
</PRE>
</UL>
<H3>Include Files</H3>
<UL>
<PRE>
#include <FL/Fl_Double_Window.H>
</PRE>
</UL>
<H3>Description</H3>
The <TT>Fl_Double_Window</TT> class provides a double-buffered window.
If possible this will use the X double buffering extension (Xdbe). If
not, it will draw the window data into an off-screen pixmap, and then
copy it to the on-screen window.
<P>It is highly recommended that you put the following code before the
first <TT>show()</TT> of <I>any</I> window in your program: </P>
<UL>
<PRE>
Fl::visual(FL_DOUBLE|FL_INDEX)
</PRE>
</UL>
This makes sure you can use Xdbe on servers where double buffering
does not exist for every visual.
<H3>Methods</H3>
<UL>
<LI><A href=#Fl_Double_Window.Fl_Double_Window>Fl_Double_Window</A></LI>
<LI><A href=#Fl_Double_Window.~Fl_Double_Window>~Fl_Double_Window</A></LI>
</UL>
<H4><A name=Fl_Double_Window.Fl_Double_Window>
Fl_Double_Window::Fl_Double_Window(int w, int h, const
char *label = 0)<br>
Fl_Double_Window::Fl_Double_Window(int x, int y, int w, int h, const
char *label = 0)</A></H4>
<p>Creates a new <TT>Fl_Double_Window</TT> widget using the given
position, size, and label (title) string.</p>
<H4><A name=Fl_Double_Window.~Fl_Double_Window>virtual
Fl_Double_Window::~Fl_Double_Window()</A></H4>
The destructor <I>also deletes all the children</I>. This allows a
whole tree to be deleted at once, without having to keep a pointer to
all the children in the user code.
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