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<!-- NEW PAGE -->
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<H2><A name=Fl_Window>class Fl_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_Group.html#Fl_Group>Fl_Group</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_Window</B>
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1999-01-13 22:28:54 +03:00
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+----<A href=Fl_Double_Window.html#Fl_Double_Window>Fl_Double_Window</A>, <A href=Fl_Gl_Window.html#Fl_Gl_Window>Fl_Gl_Window</A>,
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<A href=Fl_Overlay_Window.html#Fl_Overlay_Window>Fl_Overlay_Window</A>, <A href=Fl_Single_Window.html#Fl_Single_Window>Fl_Single_Window</A>
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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_Window.H>
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</PRE>
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</UL>
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<H3>Description</H3>
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This widget produces an actual window. This can either be a main
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window, with a border and title and all the window management controls,
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or a "subwindow" inside a window. This is controlled by whether or not
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the window has a <TT>parent()</TT>.
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<P>Once you create a window, you usually add children <TT>Fl_Widget</TT>
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's to it by using <TT>window->add(child)</TT> for each new widget. See <A
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href=Fl_Group.html#Fl_Group><TT>Fl_Group</TT></A> for more information
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on how to add and remove children. </P>
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<P>There are several subclasses of <TT>Fl_Window</TT> that provide
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double-buffering, overlay, menu, and OpenGL support. </P>
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<P>The window's callback is done if the user tries to close a window
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using the window manager and <A href="Fl.html#Fl.modal"><TT>
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Fl::modal()</TT></A> is zero or equal to the window. <TT>Fl_Window</TT>
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has a default callback that calls <TT>Fl_Window::hide()</TT>. </P>
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<H3>Methods</H3>
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<CENTER>
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<TABLE width=90% summary="Fl_Window methods.">
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<TR><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Window.Fl_Window>Fl_Window</A></LI>
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<LI><A href=#Fl_Window.~Fl_Window>~Fl_Window</A></LI>
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<LI><A href=#Fl_Window.border>border</A></LI>
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<LI><A href=#Fl_Window.clear_border>clear_border</A></LI>
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<LI><A href=#Fl_Window.current>current</A></LI>
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<LI><A href=#Fl_Window.cursor>cursor</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Window.free_position>free_position</A></LI>
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<LI><A href=#Fl_Window.fullscreen>fullscreen</A></LI>
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<LI><A href=#Fl_Window.fullscreen_off>fullscreen_off</A></LI>
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<LI><A href=#Fl_Window.hide>hide</A></LI>
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<LI><A href=#Fl_Window.hotspot>hotspot</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Window.iconize>iconize</A></LI>
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<LI><A href=#Fl_Window.iconlabel>iconlabel</A></LI>
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<LI><A href=#Fl_Window.label>label</A></LI>
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<LI><A href=#Fl_Window.make_current>make_current</A></LI>
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<LI><A href=#Fl_Window.modal>modal</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Window.non_modal>non_modal</A></LI>
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<LI><A href=#Fl_Window.resize>resize</A></LI>
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<LI><A href=#Fl_Window.set_modal>set_modal</A></LI>
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<LI><A href=#Fl_Window.set_non_modal>set_non_modal</A></LI>
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<LI><A href=#Fl_Window.show>show</A></LI>
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</UL>
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</TD><TD align=left valign=top>
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<UL>
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<LI><A href=#Fl_Window.shown>shown</A></LI>
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<LI><A href=#Fl_Window.size_range>size_range</A></LI>
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<LI><A href=#Fl_Window.xclass>xclass</A></LI>
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</UL>
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</TD></TR>
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</TABLE>
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</CENTER>
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<H4><A name=Fl_Window.Fl_Window>Fl_Window::Fl_Window(int w, int h, const char *title = 0)</A></H4>
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The first form of the constructor should be used for a "top-level" window
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(that is, one that is not inside another window). It correctly sets
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<tt>visible()</tt> to false and <tt>parent()</tt> to <tt>NULL</tt>.
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By not specifying the position of the window, the window system will pick a
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place to show the window or allow the user to pick a location. If you want to
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force a position you should call <tt>position(x,y)</tt> or <tt>hotspot()</tt>
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before calling <tt>show()</tt>.
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2001-11-29 22:24:00 +03:00
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<P><TT>Fl_Widget::box()</TT> is set to <TT>FL_FLAT_BOX</TT>. If you
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plan to completely fill the window with children widgets you should
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change this to <TT>FL_NO_BOX</TT>. If you turn the window border off
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you may want to change this to <TT>FL_UP_BOX</TT>. </P>
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<h4>Fl_Window::Fl_Window(int x, int y, int w, int h, const char *title = 0)</H4>
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<P>The second form of the constructor is for creating child windows. It
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leaves <tt>visible()</tt> set to true.
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<H4><A name=Fl_Window.~Fl_Window>virtual Fl_Window::~Fl_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. A kludge has been done so the <TT>
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Fl_Window</TT> and all of it's children can be automatic (local)
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variables, but you must declare the <TT>Fl_Window</TT> <I>first</I> so
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that it is destroyed last.
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<H4><A name=Fl_Window.size_range>void Fl_Window::size_range(int minw,
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int minh, int maxw=0, int maxh=0, int dw=0, int dh=0, int aspect=0)</A></H4>
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Set the allowable range the user can resize this window to. This only
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works for top-level windows.
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<UL>
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<LI><TT>minw</TT> and <TT>minh</TT> are the smallest the window can
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be. </LI>
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<LI><TT>maxw</TT> and <TT>maxh</TT> are the largest the window can be.
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If either is <I>equal</I> to the minimum then you cannot resize in
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that direction. If either is zero then FLTK picks a maximum size in
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that direction such that the window will fill the screen. </LI>
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<LI><TT>dw</TT> and <TT>dh</TT> are size increments. The window will
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be constrained to widths of <TT>minw + N * dw</TT>, where <TT>N</TT>
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is any non-negative integer. If these are less or equal to 1 they
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are ignored. (this is ignored on WIN32)</LI>
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<LI><TT>aspect</TT> is a flag that indicates that the window should
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preserve it's aspect ratio. This only works if both the maximum and
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minimum have the same aspect ratio. (ignored on WIN32 and by many X
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window managers)</LI>
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</UL>
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If this function is not called, FLTK tries to figure out the range
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from the setting of <A href="Fl_Group.html#Fl_Group.resizable"><TT>resizable()</TT></A>:
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<UL>
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<LI>If <TT>resizable()</TT> is <TT>NULL</TT> (this is the default)
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then the window cannot be resized and the resize border and max-size
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control will not be displayed for the window. </LI>
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<LI>If either dimension of <TT>resizable()</TT> is less than 100,
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then that is considered the minimum size. Otherwise the <TT>
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resizable()</TT> has a minimum size of 100. </LI>
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<LI>If either dimension of <TT>resizable()</TT> is zero, then that is
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also the maximum size (so the window cannot resize in that direction). </LI>
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</UL>
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It is undefined what happens if the current size does not fit in the
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constraints passed to <TT>size_range()</TT>.
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<H4><A name=Fl_Window.show>virtual void Fl_Window::show()
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<BR> void Fl_Window::show(int argc, char **argv)</A></H4>
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Put the window on the screen. Usually this has the side effect of
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opening the display. The second form is used for top-level
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windows and allow standard arguments to be parsed from the
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command-line.
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<P>If the window is already shown then it is restored and raised to the
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top. This is really convenient because your program can call <TT>show()</TT>
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at any time, even if the window is already up. It also means that <TT>
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show()</TT> serves the purpose of <TT>raise()</TT> in other toolkits. </P>
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<H4><A name=Fl_Window.hide>virtual void Fl_Window::hide()</A></H4>
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Remove the window from the screen. If the window is already hidden or
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has not been shown then this does nothing and is harmless.
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<H4><A name=Fl_Window.shown>int Fl_Window::shown() const</A></H4>
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Returns non-zero if <TT>show()</TT> has been called (but not <TT>hide()</TT>
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). You can tell if a window is iconified with <TT>(w->shown()
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&!w->visible())</TT>.
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<H4><A name=Fl_Window.iconize>void Fl_Window::iconize()</A></H4>
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Iconifies the window. If you call this when <TT>shown()</TT> is false
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it will <TT>show()</TT> it as an icon. If the window is already
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iconified this does nothing.
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<P>Call <TT>show()</TT> to restore the window. </P>
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<P>When a window is iconified/restored (either by these calls or by the
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user) the <TT>handle()</TT> method is called with <TT>FL_HIDE</TT> and <TT>
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FL_SHOW</TT> events and <TT>visible()</TT> is turned on and off. </P>
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<P>There is no way to control what is drawn in the icon except with the
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string passed to <TT>Fl_Window::xclass()</TT>. You should not rely on
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window managers displaying the icons. </P>
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<H4><A name=Fl_Window.resize>void Fl_Window::resize(int,int,int,int)</A></H4>
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Change the size and position of the window. If <TT>shown()</TT> is
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true, these changes are communicated to the window server (which may
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refuse that size and cause a further resize). If <TT>shown()</TT> is
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false, the size and position are used when <TT>show()</TT> is called.
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See <A href=Fl_Group.html#Fl_Group><TT>Fl_Group</TT></A> for the effect
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of resizing on the child widgets.
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<P>You can also call the <TT>Fl_Widget</TT> methods <TT>size(x,y)</TT>
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and <TT>position(w,h)</TT>, which are inline wrappers for this virtual
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function. </P>
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<H4><A name=Fl_Window.free_position>void Fl_Window::free_position()</A></H4>
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Undoes the effect of a previous <TT>resize()</TT> or <TT>show()</TT>
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so that the next time <TT>show()</TT> is called the window manager is
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free to position the window.
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<H4><A name=Fl_Window.hotspot>void Fl_Window::hotspot(int x, int y, int
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offscreen = 0)
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<BR> void Fl_Window::hotspot(const Fl_Widget*, int offscreen = 0)
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<BR> void Fl_Window::hotspot(const Fl_Widgetp, int offscreen = 0)</A></H4>
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<TT>position()</TT> the window so that the mouse is pointing at the
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given position, or at the center of the given widget, which may be the
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window itself. If the optional <TT>offscreen</TT> parameter is
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non-zero, then the window is allowed to extend off the screen (this
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does not work with some X window managers).
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<H4><A name=Fl_Window.fullscreen>void Fl_Window::fullscreen()</A></H4>
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Makes the window completely fill the screen, without any window
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manager border visible. You must use <TT>fullscreen_off()</TT> to undo
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this. This may not work with all window managers.
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<H4><A name=Fl_Window.fullscreen_off>int Fl_Window::fullscreen_off(int
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x, int y, int w, int h)</A></H4>
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Turns off any side effects of <TT>fullscreen()</TT> and does <TT>
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resize(x,y,w,h)</TT>.
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<H4><A name=Fl_Window.border>int Fl_Window::border(int)
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<BR> uchar Fl_Window::border() const</A></H4>
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Gets or sets whether or not the window manager border is around the
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window. The default value is true. <TT>border(n)</TT> can be used to
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turn the border on and off, and returns non-zero if the value has been
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changed. <I>Under most X window managers this does not work after <TT>
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show()</TT> has been called, although SGI's 4DWM does work.</I>
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<H4><A name=Fl_Window.clear_border>void Fl_Window::clear_border()</A></H4>
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<TT>clear_border()</TT> is a fast inline function to turn the border
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off. It only works before <TT>show()</TT> is called.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.set_modal>void Fl_Window::set_modal()</A></H4>
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2001-11-29 22:24:00 +03:00
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A "modal" window, when <TT>shown()</TT>, will prevent any events from
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being delivered to other windows in the same program, and will also
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remain on top of the other windows (if the X window manager supports
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the "transient for" property). Several modal windows may be shown at
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once, in which case only the last one shown gets events. You can see
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2002-01-15 05:17:19 +03:00
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which window (if any) is modal by calling <A href="Fl.html#Fl.modal"><TT>
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2001-11-29 22:24:00 +03:00
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Fl::modal()</TT></A>.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.modal>uchar Fl_Window::modal() const</A></H4>
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2001-11-29 22:24:00 +03:00
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Returns true if this window is modal.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.set_non_modal>void Fl_Window::set_non_modal()</A></H4>
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2001-11-29 22:24:00 +03:00
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A "non-modal" window (terminology borrowed from Microsoft Windows)
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acts like a <TT>modal()</TT> one in that it remains on top, but it has
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no effect on event delivery. There are <I>three</I> states for a
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window: modal, non-modal, and normal.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.non_modal>uchar Fl_Window::non_modal() const</A></H4>
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2001-11-29 22:24:00 +03:00
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Returns true if this window is modal or non-modal.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.label>void Fl_Window::label(const char*)
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<BR> const char* Fl_Window::label() const</A></H4>
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2001-11-29 22:24:00 +03:00
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Gets or sets the window title bar label.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.iconlabel>void Fl_Window::iconlabel(const char*)
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<BR> const char* Fl_Window::iconlabel() const</A></H4>
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2001-11-29 22:24:00 +03:00
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Gets or sets the icon label.
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.xclass>void Fl_Window::xclass(const char*)
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<BR> const char* Fl_Window::xclass() const</A></H4>
|
2001-11-29 22:24:00 +03:00
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A string used to tell the system what type of window this is. Mostly
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this identifies the picture to draw in the icon. <I>Under X, this is
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turned into a <TT>XA_WM_CLASS</TT> pair by truncating at the first
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non-alphanumeric character and capitalizing the first character, and
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the second one if the first is 'x'. Thus "foo" turns into "foo, Foo",
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1999-01-13 22:28:54 +03:00
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and "xprog.1" turns into "xprog, XProg".</I> This only works if called <I>
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2001-11-29 22:24:00 +03:00
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before</I> calling <TT>show()</TT>.
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1999-01-27 11:45:11 +03:00
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<P>Under Microsoft Windows this string is used as the name of the
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WNDCLASS structure, though it is not clear if this can have any
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visible effect. </P>
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1999-01-13 22:28:54 +03:00
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<H4><A name=Fl_Window.make_current>void Fl_Window::make_current()</A></H4>
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<TT>make_current()</TT> sets things up so that the drawing functions in <A
|
2002-02-14 00:26:04 +03:00
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href=drawing.html#drawing><TT><FL/fl_draw.H></TT></A> will go into this
|
2001-11-29 22:24:00 +03:00
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window. This is useful for incremental update of windows, such as in an
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idle callback, which will make your program behave much better if it
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draws a slow graphic. <B>Danger: incremental update is very hard to
|
1999-01-13 22:28:54 +03:00
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debug and maintain!</B>
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<P>This method only works for the <TT>Fl_Window</TT> and <TT>
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Fl_Gl_Window</TT> classes. </P>
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<H4><A name=Fl_Window.current>static Fl_Window* Fl_Window::current()</A></H4>
|
1999-01-31 10:43:16 +03:00
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Returns the last window that was made current.
|
2001-05-06 20:25:05 +04:00
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<H4><A name=Fl_Window.cursor>void Fl_Window::cursor(Fl_Cursor, Fl_Color = FL_WHITE, Fl_Color = FL_BLACK)</A></H4>
|
1999-01-31 10:43:16 +03:00
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Change the cursor for this window. This always calls the system, if
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you are changing the cursor a lot you may want to keep track of how
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you set it in a static varaible and call this only if the new cursor
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is different.
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<P>The type <TT>Fl_Cursor</TT> is an enumeration defined in <A
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href=enumerations.html#cursor> <TT><Enumerations.H></TT></A>.
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(Under X you can get any XC_cursor value by passing <TT>
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Fl_Cursor((XC_foo/2)+1)</TT>). The colors only work on X, they are
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not implemented on WIN32.
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</BODY></HTML>
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