<HTML><BODY> <!-- NEW PAGE --> <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> | +----<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. </BODY></HTML>