Once you create a window, you usually add children Fl_Widget 's to it by using window->add(child) for each new widget. See Fl_Group for more information on how to add and remove children.
There are several subclasses of Fl_Window that provide double-buffering, overlay, menu, and OpenGL support.
The window's callback is done if the user tries to close a window using the window manager and Fl::modal() is zero or equal to the window. Fl_Window has a default callback that calls Fl_Window::hide(). */ class FL_EXPORT Fl_Window : public Fl_Group { friend class Fl_X; Fl_X *i; // points at the system-specific stuff const char* iconlabel_; const char* xclass_; const void* icon_; // size_range stuff: int minw, minh, maxw, maxh; int dw, dh, aspect; uchar size_range_set; // cursor stuff Fl_Cursor cursor_default; Fl_Color cursor_fg, cursor_bg; void size_range_(); // values for flags(): enum { FL_MODAL = 64, FL_NOBORDER = 8, FL_FORCE_POSITION = 16, FL_NON_MODAL = 32, FL_OVERRIDE = 256 }; void _Fl_Window(); // constructor innards // unimplemented copy ctor and assignment operator Fl_Window(const Fl_Window&); Fl_Window& operator=(const Fl_Window&); protected: /** Stores the last window that was made current. See current() const */ static Fl_Window *current_; virtual void draw(); /** Forces the window to be drawn, this window is also made current and calls draw(). */ virtual void flush(); public: /** Creates a window from the given size and title. If Fl_Group::current() is not NULL, the window is created as a subwindow of the parent window.
The first form of the constructor creates a top-level window and asks the window manager to position the window. The second form of the constructor either creates a subwindow or a top-level window at the specified location (x,y) , subject to window manager configuration. If you do not specify the position of the window, the window manager will pick a place to show the window or allow the user to pick a location. Use position(x,y) or hotspot() before calling show() to request a position on the screen. See Fl_Window::resize() for some more details on positioning windows.
Top-level windows initially have visible() set to 0 and parent() set to NULL. Subwindows initially have visible() set to 1 and parent() set to the parent window pointer.
Fl_Widget::box() defaults to FL_FLAT_BOX. If you plan to completely fill the window with children widgets you should change this to FL_NO_BOX. If you turn the window border off you may want to change this to FL_UP_BOX. */ Fl_Window(int w, int h, const char* title= 0); /** Creates a window from the given position, size and title. See Fl_Window::Fl_Window(int w, int h, const char *title = 0) */ Fl_Window(int x, int y, int w, int h, const char* title = 0); /** The destructor also deletes all the children. This allows a whole tree to be deleted at once, without having to keep a pointer to all the children in the user code. A kludge has been done so the Fl_Window and all of it's children can be automatic (local) variables, but you must declare the Fl_Window first so that it is destroyed last. */ virtual ~Fl_Window(); virtual int handle(int); /** Changes the size and position of the window. If shown() is true, these changes are communicated to the window server (which may refuse that size and cause a further resize). If shown() is false, the size and position are used when show() is called. See Fl_Group for the effect of resizing on the child widgets.
You can also call the Fl_Widget methods size(x,y) and position(w,h), which are inline wrappers for this virtual function.
A top-level window can not force, but merely suggest a position and size to the operating system. The window manager may not be willing or able to display a window at the desired position or with the given dimensions. It is up to the application developer to verify window parameters after the resize request. */ virtual void resize(int,int,int,int); /** Gets or sets whether or not the window manager border is around the window. The default value is true. border(n) can be used to turn the border on and off, and returns non-zero if the value has been changed. Under most X window managers this does not work after show() has been called, although SGI's 4DWM does work. */ void border(int b); /** Fast inline function to turn the border off. It only works before show() is called. */ void clear_border() {set_flag(FL_NOBORDER);} /** See int Fl_Window::border(int) */ int border() const {return !(flags() & FL_NOBORDER);} /** Activate the flags FL_NOBORDER|FL_OVERRIDE */ void set_override() {set_flag(FL_NOBORDER|FL_OVERRIDE);} /** Returns non zero if FL_OVERRIDE flag is set, 0 otherwise. */ int override() const { return flags()&FL_OVERRIDE; } /** A "modal" window, when shown(), will prevent any events from being delivered to other windows in the same program, and will also remain on top of the other windows (if the X window manager supports the "transient for" property). Several modal windows may be shown at once, in which case only the last one shown gets events. You can See which window (if any) is modal by calling Fl::modal(). */ void set_modal() {set_flag(FL_MODAL);} /** Returns true if this window is modal. */ int modal() const {return flags() & FL_MODAL;} /** A "non-modal" window (terminology borrowed from Microsoft Windows) acts like a modal() one in that it remains on top, but it has no effect on event delivery. There are three states for a window: modal, non-modal, and normal. */ void set_non_modal() {set_flag(FL_NON_MODAL);} /** Returns true if this window is modal or non-modal. */ int non_modal() const {return flags() & (FL_NON_MODAL|FL_MODAL);} /** Position the window so that the mouse is pointing at the given position, or at the center of the given widget, which may be the window itself. If the optional offscreen parameter is non-zero, then the window is allowed to extend off the screen (this does not work with some X window managers). \see position() */ void hotspot(int x, int y, int offscreen = 0); /** See void Fl_Window::hotspot(int x, int y, int offscreen = 0) */ void hotspot(const Fl_Widget*, int offscreen = 0); /** See void Fl_Window::hotspot(int x, int y, int offscreen = 0) */ void hotspot(const Fl_Widget& p, int offscreen = 0) {hotspot(&p,offscreen);} /** Undoes the effect of a previous resize() or show() so that the next time show() is called the window manager is free to position the window. */ void free_position() {clear_flag(FL_FORCE_POSITION);} /** Set the allowable range the user can resize this window to. This only works for top-level windows.
Under Microsoft Windows this string is used as the name of the WNDCLASS structure, though it is not clear if this can have any visible effect. The passed pointer is stored unchanged. The string is not copied. */ void xclass(const char* c) {xclass_ = c;} /** Gets the current icon window target dependent data */ const void* icon() const {return icon_;} /** Sets the current icon window target dependent data */ void icon(const void * ic) {icon_ = ic;} /** Returns non-zero if show() has been called (but not hide() ). You can tell if a window is iconified with (w->shown() &!w->visible()). */ int shown() {return i != 0;} /** Put the window on the screen. Usually this has the side effect of opening the display. The second form is used for top-level windows and allow standard arguments to be parsed from the command-line.
If the window is already shown then it is restored and raised to the top. This is really convenient because your program can call show() at any time, even if the window is already up. It also means that show() serves the purpose of raise() in other toolkits. */ virtual void show(); /** Remove the window from the screen. If the window is already hidden or has not been shown then this does nothing and is harmless. */ virtual void hide(); /** See virtual void Fl_Window::show() */ void show(int, char**); /** Makes the window completely fill the screen, without any window manager border visible. You must use fullscreen_off() to undo this. This may not work with all window managers. */ void fullscreen(); /** Turns off any side effects of fullscreen() and does resize(x,y,w,h). */ void fullscreen_off(int,int,int,int); /** 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. Danger: incremental update is very hard to debug and maintain!
This method only works for the Fl_Window and Fl_Gl_Window derived classes. */ void make_current(); // for back-compatibility only: /** Changes the cursor for this window. This always calls the system, if you are changing the cursor a lot you may want to keep track of how you set it in a static varaible and call this only if the new cursor is different.
The type Fl_Cursor is an enumeration defined in <Enumerations.H>. (Under X you can get any XC_cursor value by passing Fl_Cursor((XC_foo/2)+1)). The colors only work on X, they are not implemented on WIN32.
For back compatibility only. */ void cursor(Fl_Cursor, Fl_Color=FL_BLACK, Fl_Color=FL_WHITE); // platform dependent void default_cursor(Fl_Cursor, Fl_Color=FL_BLACK, Fl_Color=FL_WHITE); static void default_callback(Fl_Window*, void* v); }; #endif // // End of "$Id$". //