44bb080c0f
Although this was not strictly necessary I decided to implement the proposed patch, but in a slightly different way. This adds a static public method for internal use only but it wouldn't do any harm if a user called it.
629 lines
23 KiB
C++
629 lines
23 KiB
C++
//
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// Window header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2023 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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/** \file
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Fl_Window widget . */
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#ifndef Fl_Window_H
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#define Fl_Window_H
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#include <FL/Fl.H>
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#include <FL/Fl_Group.H>
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#include <FL/Fl_Bitmap.H>
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#define FL_WINDOW 0xF0 ///< window type id: all subclasses have type() >= this
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#define FL_DOUBLE_WINDOW 0xF1 ///< double window type id
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class Fl_X;
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class Fl_Window_Driver;
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class Fl_RGB_Image;
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class Fl_Double_Window;
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/**
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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 parent().
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Once you create a window, you usually add children Fl_Widget's to it
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by using window->add(child) for each new widget.
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See Fl_Group for more information on how to add and remove children.
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There are several subclasses of Fl_Window that provide
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double-buffering, overlay, menu, and OpenGL support.
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The window's callback is done if the user tries to close a window
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using the window manager and Fl::modal() is zero or equal to the
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window. Fl_Window has a default callback that calls Fl_Window::hide().
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Callback reasons can be \p FL_REASON_CANCELLED if the Escape key was pressed,
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or \p FL_REASON_CLOSED when the close button is clicked. \p FL_WHEN_...
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flags are ignored.
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*/
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class FL_EXPORT Fl_Window : public Fl_Group {
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friend class Fl_X;
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friend class Fl_Window_Driver;
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private:
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static char *default_xclass_;
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static char show_next_window_iconic_; // 1 means create next window in iconic form
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int no_fullscreen_x;
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int no_fullscreen_y;
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int no_fullscreen_w;
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int no_fullscreen_h;
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int fullscreen_screen_top;
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int fullscreen_screen_bottom;
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int fullscreen_screen_left;
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int fullscreen_screen_right;
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// TODO: it would make sense to merge the use of Fl_X and Fl_Window_Driver, maybe simply by
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// TODO: deriving Fl_Window_Driver from Fl_X. However, there are a lot of historic kludges
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// TODO: for some platforms around Fl_X.
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Fl_X *flx_; // points at the system-specific stuff, but exists only after the window is mapped
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Fl_Window_Driver *pWindowDriver; // points at the system-specific stuff at window creation time
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const char* iconlabel_;
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char* xclass_;
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// private size_range stuff:
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int minw_, minh_, maxw_, maxh_;
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int dw_, dh_, aspect_;
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uchar size_range_set_; // true (1) if size_range() has been set or calculated
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// cursor stuff
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Fl_Cursor cursor_default;
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void _Fl_Window(); // constructor innards
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// unimplemented copy ctor and assignment operator
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Fl_Window(const Fl_Window&);
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Fl_Window& operator=(const Fl_Window&);
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void is_maximized_(bool b);
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protected:
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/** Stores the last window that was made current. See current() const */
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static Fl_Window *current_;
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void draw() FL_OVERRIDE;
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/** Forces the window to be drawn, this window is also made current and calls draw(). */
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virtual void flush();
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/**
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Sets an internal flag that tells FLTK and the window manager to
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honor position requests.
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This is used internally and should not be needed by user code.
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\param[in] force 1 to set the FORCE_POSITION flag, 0 to clear it
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*/
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void force_position(int force) {
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if (force) set_flag(FORCE_POSITION);
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else clear_flag(FORCE_POSITION);
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}
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/**
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Returns the internal state of the window's FORCE_POSITION flag.
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\retval 1 if flag is set
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\retval 0 otherwise
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\see force_position(int)
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*/
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int force_position() const { return ((flags() & FORCE_POSITION)?1:0); }
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void free_icons();
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void default_size_range(); // calculate size_range() if not set explicitly
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int is_resizable(); // calculate size_range() and return whether this is resizable
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public:
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/**
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Creates a window from the given width \p w, height \p h, and \p title.
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If Fl_Group::current() is not NULL, the window is created as a
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subwindow of the parent window.
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The (w, h) form of the constructor creates a top-level window
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and asks the window manager to position the window. The (x, y, w, h)
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form of the constructor either creates a subwindow or a
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top-level window at the specified location (x, y), subject to window
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manager configuration. If you do not specify the position of the
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window, the window manager will pick a place to show the window
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or allow the user to pick a location. Use position(x, y)
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or hotspot() before calling show() to request a
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position on the screen. See Fl_Window::resize()
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for some more details on positioning windows.
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Top-level windows initially have visible() set to 0
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and parent() set to NULL. Subwindows initially
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have visible() set to 1 and parent() set to
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the parent window pointer.
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Fl_Widget::box() defaults to FL_FLAT_BOX. If you plan to
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completely fill the window with children widgets you should
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change this to FL_NO_BOX. If you turn the window border off
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you may want to change this to FL_UP_BOX.
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\see Fl_Window(int x, int y, int w, int h, const char *title)
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*/
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Fl_Window(int w, int h, const char *title = 0);
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/** Creates a window from the given position (x, y), size (w, h) and title.
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On a multi-screen system, the values computed by
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Fl::screen_xywh(int &X, int &Y, int &W, int &H, int n) can be used to
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discover the coordinates of the area of screen \#n.
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When these screens have various scale factor
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values, an \p (x, y) pair may not be enough to specify the targeted screen
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for the window, because the same \p (x,y) pair can belong to several screens.
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In that situation, a call to Fl_Window::screen_num(int) is to be used to identify
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unambiguously the targeted screen.
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\see Fl_Window(int w, int h, const char *title)
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\see Fl::screen_xywh(int &X, int &Y, int &W, int &H, int n)
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\note Under Wayland, it's generally not possible for the client app to control
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the position of a window in the system. It's only possible to specify on what screen
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should the compositor place a fullscreen window.
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*/
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Fl_Window(int x, int y, int w, int h, const char *title = 0);
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/**
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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
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Fl_Window and all of its children can be automatic (local)
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variables, but you must declare the Fl_Window <I>first</I> so
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that it is destroyed last.
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*/
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virtual ~Fl_Window();
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int handle(int) FL_OVERRIDE;
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/**
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Changes the size and position of the window. If shown() is true,
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these changes are communicated to the window server (which may
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refuse that size and cause a further resize). If shown() is
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false, the size and position are used when show() is called.
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See Fl_Group for the effect of resizing on the child widgets.
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You can also call the Fl_Widget methods size(x,y) and position(w,h),
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which are inline wrappers for this virtual function.
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A top-level window can not force, but merely suggest a position and
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size to the operating system. The window manager may not be willing or
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able to display a window at the desired position or with the given
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dimensions. It is up to the application developer to verify window
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parameters after the resize request.
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*/
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void resize(int X,int Y,int W,int H) FL_OVERRIDE;
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/** Sets whether or not the window manager border is around the window.
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The default value is true. <I>With some X window
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managers, this does not work after show() has been called.</I>
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*/
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void border(int b);
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/**
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Fast inline function to turn the window manager border
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off. It only works before show() is called.
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*/
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void clear_border() {set_flag(NOBORDER);}
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/** Returns whether the window possesses a border */
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unsigned int border() const {return !(flags() & NOBORDER);}
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/** Activates the flags NOBORDER|OVERRIDE */
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void set_override() {set_flag(NOBORDER|OVERRIDE);}
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/** Returns non zero if OVERRIDE flag is set, 0 otherwise. */
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unsigned int override() const { return flags()&OVERRIDE; }
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/**
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A "modal" window, when shown(), 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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which window (if any) is modal by calling Fl::modal().
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*/
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void set_modal() {set_flag(MODAL);}
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/** Returns true if this window is modal. */
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unsigned int modal() const {return flags() & MODAL;}
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/**
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A "non-modal" window (terminology borrowed from Microsoft Windows)
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acts like a modal() 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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*/
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void set_non_modal() {set_flag(NON_MODAL);}
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/** Returns true if this window is modal or non-modal. */
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unsigned int non_modal() const {return flags() & (NON_MODAL|MODAL);}
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/**
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Clears the "modal" flags and converts a "modal" or "non-modal"
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window back into a "normal" window.
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Note that there are <I>three</I> states for a window: modal,
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non-modal, and normal.
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You can not change the "modality" of a window whilst
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it is shown, so it is necessary to first hide() the window,
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change its "modality" as required, then re-show the window
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for the new state to take effect.
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This method can also be used to change a "modal" window into a
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"non-modal" one. On several supported platforms, the "modal" state
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over-rides the "non-modal" state, so the "modal" state must be
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cleared before the window can be set into the "non-modal"
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state.
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In general, the following sequence should work:
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\code
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win->hide();
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win->clear_modal_states();
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// Set win to new state as desired, or leave "normal", e.g...
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win->set_non_modal();
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win->show();
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\endcode
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\note Under some window managers, the sequence of hiding the
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window and changing its modality will often cause it to be
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re-displayed at a different position when it is subsequently
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shown. This is an irritating feature but appears to be
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unavoidable at present.
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As a result we would advise to use this method only when
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absolutely necessary.
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\see void set_modal(), void set_non_modal()
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*/
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void clear_modal_states() {clear_flag(NON_MODAL | MODAL);}
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/**
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Marks the window as a menu window.
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This is intended for internal use, but it can also be used if you
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write your own menu handling. However, this is not recommended.
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This flag is used for correct "parenting" of windows in communication
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with the windowing system. Modern X window managers can use different
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flags to distinguish menu and tooltip windows from normal windows.
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This must be called before the window is shown and cannot be changed
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later.
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*/
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void set_menu_window() {set_flag(MENU_WINDOW);}
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/** Returns true if this window is a menu window. */
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unsigned int menu_window() const {return flags() & MENU_WINDOW;}
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/**
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Marks the window as a tooltip window.
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This is intended for internal use, but it can also be used if you
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write your own tooltip handling. However, this is not recommended.
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This flag is used for correct "parenting" of windows in communication
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with the windowing system. Modern X window managers can use different
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flags to distinguish menu and tooltip windows from normal windows.
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This must be called before the window is shown and cannot be changed
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later.
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\note Since Fl_Tooltip_Window is derived from Fl_Menu_Window, this
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also \b clears the menu_window() state.
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*/
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void set_tooltip_window() { set_flag(TOOLTIP_WINDOW);
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clear_flag(MENU_WINDOW); }
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/** Returns true if this window is a tooltip window. */
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unsigned int tooltip_window() const {return flags() & TOOLTIP_WINDOW;}
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/**
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Positions the window so that the mouse is pointing at the given
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position, or at the center of the given widget, which may be the
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window itself. If the optional offscreen 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). \see position()
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*/
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void hotspot(int x, int y, int offscreen = 0);
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/** See void Fl_Window::hotspot(int x, int y, int offscreen = 0) */
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void hotspot(const Fl_Widget*, int offscreen = 0);
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/** See void Fl_Window::hotspot(int x, int y, int offscreen = 0) */
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void hotspot(const Fl_Widget& p, int offscreen = 0) {hotspot(&p,offscreen);}
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/**
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Undoes the effect of a previous resize() or show() so that the next time
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show() is called the window manager is free to position the window.
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This is for Forms compatibility only.
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\deprecated please use force_position(0) instead
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*/
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void free_position() {clear_flag(FORCE_POSITION);}
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void size_range(int minw, int minh, int maxw=0, int maxh=0, int dw=0, int dh=0, int aspect=0);
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/** See void Fl_Window::label(const char*) */
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const char* label() const {return Fl_Widget::label();}
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/** See void Fl_Window::iconlabel(const char*) */
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const char* iconlabel() const {return iconlabel_;}
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/** Sets the window title bar label. */
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void label(const char*);
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/** Sets the icon label. */
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void iconlabel(const char*);
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/** Sets the icon label. */
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void label(const char* label, const char* iconlabel); // platform dependent
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void copy_label(const char* a);
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static void default_xclass(const char*);
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static const char *default_xclass();
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const char* xclass() const;
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void xclass(const char* c);
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static void default_icon(const Fl_RGB_Image*);
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static void default_icons(const Fl_RGB_Image*[], int);
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void icon(const Fl_RGB_Image*);
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void icons(const Fl_RGB_Image*[], int);
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#if defined(_WIN32) || defined(FL_DOXYGEN)
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typedef struct HICON__* HICON;
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// These 2 member functions break the driver model but are kept for back compatibility.
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// They are implemented in Fl_win32.cxx
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/** Sets the default window icons (Windows platform only).
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Convenience function to set the default icons using Windows'
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native HICON icon handles.
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The given icons are copied. You can free the icons immediately after
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this call.
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\param[in] big_icon default large icon for all windows
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subsequently created
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\param[in] small_icon default small icon for all windows
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subsequently created
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\see Fl_Window::default_icon(const Fl_RGB_Image *)
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\see Fl_Window::default_icons(const Fl_RGB_Image *[], int)
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\see Fl_Window::icon(const Fl_RGB_Image *)
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\see Fl_Window::icons(const Fl_RGB_Image *[], int)
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\see Fl_Window::icons(HICON, HICON)
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*/
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static void default_icons(HICON big_icon, HICON small_icon);
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/** Sets the window icons using HICON handles (Windows platform only).
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The given icons are copied. You can free the icons immediately after
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this call.
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\param[in] big_icon large window icon
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\param[in] small_icon small window icon
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*/
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void icons(HICON big_icon, HICON small_icon);
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#endif // defined(_WIN32) || defined(FL_DOXYGEN)
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/* for legacy compatibility */
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const void* icon() const;
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void icon(const void * ic);
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/**
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Returns non-zero if show() has been called (but not hide()
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). You can tell if a window is iconified with (w->shown()
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&& !w->visible()).
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*/
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int shown() {return flx_ != 0;}
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/**
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Puts the window on the screen. This has the side
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effect of opening the display, if not done before.
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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 show()
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at any time, even if the window is already up. It also means that
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show() serves the purpose of raise() in other toolkits.
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Fl_Window::show(int argc, char **argv) is used for top-level
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windows and allows standard arguments to be parsed from the
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command-line.
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\note For some obscure reasons Fl_Window::show() resets the current
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group by calling Fl_Group::current(0). The comments in the code
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say "get rid of very common user bug: forgot end()". Although
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this is true it may have unwanted side effects if you show() an
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unrelated window (maybe for an error message or warning) while
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building a window or any other group widget.
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\todo Check if we can remove resetting the current group in a later
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FLTK version (after 1.3.x). This may break "already broken" programs
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though if they rely on this "feature".
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\see Fl_Window::show(int argc, char **argv)
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*/
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void show() FL_OVERRIDE;
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/**
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Removes 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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*/
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void hide() FL_OVERRIDE;
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/**
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Puts the window on the screen with show() and parses command-line arguments.
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This call should be used for top-level windows, at least for the
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first (main) window. It allows standard arguments to be parsed, as done by Fl::args(int, char **),
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from the command-line. You can use \p argc and \p argv from
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main(int argc, char **argv) for this call.
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This call also sets up some system-specific internal variables, that is,
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it sets FL_SELECTION_COLOR and calls Fl::background(), Fl::background2(), Fl::foreground()
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with default or X resources-given values, and calls Fl::scheme(const char *) for the current scheme.
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On X11, it also calls Fl::dnd_text_ops(int), Fl_Tooltip::enable(int),
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Fl::visible_focus(int) with X resources-given values.
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\param argc command-line argument count, usually from main()
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\param argv command-line argument vector, usually from main()
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\see virtual void Fl_Window::show()
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\see Fl::args(int, char **)
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*/
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void show(int argc, char **argv);
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// Enables synchronous show(), docs in Fl_Window.cxx
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void wait_for_expose();
|
|
|
|
/**
|
|
Makes the window completely fill one or more screens, without any
|
|
window manager border visible. You must use fullscreen_off() to
|
|
undo this.
|
|
|
|
\note On some platforms, this can result in the keyboard being
|
|
grabbed. The window may also be recreated, meaning hide() and
|
|
show() will be called.
|
|
|
|
\see void Fl_Window::fullscreen_screens()
|
|
*/
|
|
void fullscreen();
|
|
/**
|
|
Turns off any side effects of fullscreen()
|
|
*/
|
|
void fullscreen_off();
|
|
/**
|
|
Turns off any side effects of fullscreen() and does
|
|
resize(x,y,w,h).
|
|
*/
|
|
void fullscreen_off(int X,int Y,int W,int H);
|
|
/**
|
|
Returns non zero if FULLSCREEN flag is set, 0 otherwise.
|
|
*/
|
|
unsigned int fullscreen_active() const { return flags() & FULLSCREEN; }
|
|
/**
|
|
Sets which screens should be used when this window is in fullscreen
|
|
mode. The window will be resized to the top of the screen with index
|
|
\p top, the bottom of the screen with index \p bottom, etc.
|
|
|
|
If this method is never called, or if any argument is < 0, then the
|
|
window will be resized to fill the screen it is currently on.
|
|
|
|
\see void Fl_Window::fullscreen()
|
|
*/
|
|
void fullscreen_screens(int top, int bottom, int left, int right);
|
|
|
|
void maximize();
|
|
void un_maximize();
|
|
/** Returns whether the window is currently maximized */
|
|
unsigned int maximize_active() const { return flags() & MAXIMIZED; }
|
|
public:
|
|
/**
|
|
Iconifies the window. If you call this when shown() is false
|
|
it will show() it as an icon. If the window is already
|
|
iconified this does nothing.
|
|
|
|
Call show() to restore the window.
|
|
|
|
When a window is iconified/restored (either by these calls or by the
|
|
user) the handle() method is called with FL_HIDE and
|
|
FL_SHOW events and visible() is turned on and off.
|
|
|
|
There is no way to control what is drawn in the icon except with the
|
|
string passed to Fl_Window::xclass(). You should not rely on
|
|
window managers displaying the icons.
|
|
*/
|
|
void iconize();
|
|
|
|
int x_root() const ;
|
|
int y_root() const ;
|
|
|
|
static Fl_Window *current();
|
|
/**
|
|
Sets things up so that the drawing functions in <FL/fl_draw.H> will go
|
|
into this window. This is useful for incremental update of windows, such
|
|
as in an idle callback, which will make your program behave much better
|
|
if it draws a slow graphic. <B>Danger: incremental update is very hard to
|
|
debug and maintain!</B>
|
|
|
|
This method only works for the Fl_Window and Fl_Gl_Window derived classes.
|
|
*/
|
|
void make_current();
|
|
|
|
void cursor(Fl_Cursor);
|
|
void cursor(const Fl_RGB_Image*, int, int);
|
|
void default_cursor(Fl_Cursor);
|
|
|
|
/* for legacy compatibility */
|
|
void cursor(Fl_Cursor c, Fl_Color, Fl_Color=FL_WHITE);
|
|
void default_cursor(Fl_Cursor c, Fl_Color, Fl_Color=FL_WHITE);
|
|
|
|
static void default_callback(Fl_Window*, void* v);
|
|
|
|
/** Returns the window width including any frame added by the window manager.
|
|
|
|
Same as w() if applied to a subwindow, or if window is not yet mapped.
|
|
\see decorated_h().
|
|
*/
|
|
int decorated_w() const;
|
|
|
|
/** Returns the window height including any window title bar and any frame
|
|
added by the window manager.
|
|
|
|
Same as h() if applied to a subwindow, or if window is not yet mapped.
|
|
\note Under X11, FLTK is able to compute the size of window titlebars and borders
|
|
only if these decoration elements are strictly X11-based. When that's not the case,
|
|
decorated_h() returns the same value as h() and decorated_w() as w(), and FLTK
|
|
cannot access window decorations.
|
|
|
|
\note Under X11 again, the values returned by decorated_h() and decorated_w()
|
|
may not be reliable <b> during a resize operation</b>. The size of decoration elements
|
|
of a window is best computed when the window is first mapped.
|
|
*/
|
|
int decorated_h() const;
|
|
|
|
// Note: Doxygen docs in Fl_Widget.H to avoid redundancy.
|
|
Fl_Window* as_window() FL_OVERRIDE { return this; }
|
|
Fl_Window const* as_window() const FL_OVERRIDE { return this; }
|
|
|
|
/**
|
|
Return non-null if this is an Fl_Overlay_Window object.
|
|
*/
|
|
virtual class Fl_Overlay_Window *as_overlay_window() {return 0L; }
|
|
|
|
/**
|
|
Return non-null if this is an Fl_Double_Window object.
|
|
*/
|
|
virtual class Fl_Double_Window *as_double_window() {return 0L;}
|
|
|
|
void shape(const Fl_Image* img);
|
|
void shape(const Fl_Image& b);
|
|
const Fl_Image *shape();
|
|
void draw_backdrop();
|
|
int screen_num();
|
|
void screen_num(int screen_num);
|
|
static bool is_a_rescale();
|
|
fl_uintptr_t os_id();
|
|
|
|
/**
|
|
Sets a static flag whether the next window should be opened iconified.
|
|
|
|
\note This is an <b>internal function</b>, you should not use this in user code.
|
|
|
|
Please use Fl_Window::iconize() instead.
|
|
*/
|
|
static void show_next_window_iconic(char stat) {
|
|
show_next_window_iconic_ = stat ? 1 : 0;
|
|
}
|
|
|
|
/**
|
|
Returns the static flag whether the next window should be opened iconified.
|
|
|
|
\note This is an <b>internal function</b>, you should not use this in user code.
|
|
|
|
Please use Fl_Window::iconize() to iconify a window.
|
|
*/
|
|
static char show_next_window_iconic() {
|
|
return show_next_window_iconic_;
|
|
}
|
|
};
|
|
|
|
#endif
|