Fl_Menu_Bar Class Reference
This widget provides a standard menubar interface. More...
#include <Fl_Menu_Bar.H>
Inheritance diagram for Fl_Menu_Bar:
Public Member Functions | |
| Fl_Menu_Bar (int X, int Y, int W, int H, const char *l=0) | |
| Creates a new Fl_Menu_Bar widget using the given position, size, and label string. More... | |
| int | handle (int) FL_OVERRIDE |
| Handles the specified event. More... | |
| virtual void | play_menu (const Fl_Menu_Item *item) |
Opens the 1st level submenu of the menubar corresponding to item. More... | |
| virtual void | update () |
| Updates the menu bar after any change to its items. More... | |
 Public Member Functions inherited from Fl_Menu_ | |
| int | add (const char *) |
| This is a Forms (and SGI GL library) compatible add function, it adds many menu items, with '|' separating the menu items, and tab separating the menu item names from an optional shortcut string. More... | |
| int | add (const char *, int shortcut, Fl_Callback *, void *=0, int=0) |
| Adds a new menu item. More... | |
| int | add (const char *a, const char *b, Fl_Callback *c, void *d=0, int e=0) |
| See int Fl_Menu_::add(const char* label, int shortcut, Fl_Callback*, void *user_data=0, int flags=0) | |
| void | clear () |
| Same as menu(NULL), set the array pointer to null, indicating a zero-length menu. More... | |
| int | clear_submenu (int index) |
Clears the specified submenu pointed to by index of all menu items. More... | |
| void | copy (const Fl_Menu_Item *m, void *user_data=0) |
| Sets the menu array pointer with a copy of m that will be automatically deleted. More... | |
| Fl_Boxtype | down_box () const |
| This box type is used to surround the currently-selected items in the menus. | |
| void | down_box (Fl_Boxtype b) |
| Sets the box type used to surround the currently-selected items in the menus. More... | |
| Fl_Color | down_color () const |
| For back compatibility, same as selection_color() | |
| void | down_color (unsigned c) |
| For back compatibility, same as selection_color() | |
| int | find_index (const char *name) const |
Find the menu item index for a given menu pathname, such as "Edit/Copy". More... | |
| int | find_index (const Fl_Menu_Item *item) const |
Find the index into the menu array for a given item. More... | |
| int | find_index (Fl_Callback *cb) const |
Find the index into the menu array for a given callback cb. More... | |
| const Fl_Menu_Item * | find_item (const char *name) |
Find the menu item for a given menu pathname, such as "Edit/Copy". More... | |
| const Fl_Menu_Item * | find_item (Fl_Callback *) |
Find the menu item for the given callback cb. More... | |
| const Fl_Menu_Item * | find_item_with_argument (long) |
Find the menu item for the given user argument v. More... | |
| const Fl_Menu_Item * | find_item_with_user_data (void *) |
Find the menu item for the given user data v. More... | |
| Fl_Menu_ (int, int, int, int, const char *=0) | |
| Creates a new Fl_Menu_ widget using the given position, size, and label string. More... | |
| void | global () |
| Make the shortcuts for this menu work no matter what window has the focus when you type it. More... | |
| int | insert (int index, const char *, int shortcut, Fl_Callback *, void *=0, int=0) |
Inserts a new menu item at the specified index position. More... | |
| int | insert (int index, const char *a, const char *b, Fl_Callback *c, void *d=0, int e=0) |
| See int Fl_Menu_::insert(const char* label, int shortcut, Fl_Callback*, void *user_data=0, int flags=0) | |
| int | item_pathname (char *name, int namelen, const Fl_Menu_Item *finditem=0) const |
| Get the menu 'pathname' for the specified menuitem. More... | |
| const Fl_Menu_Item * | menu () const |
| Returns a pointer to the array of Fl_Menu_Items. More... | |
| void | menu (const Fl_Menu_Item *m) |
| Sets the menu array pointer directly. More... | |
| Fl_Boxtype | menu_box () const |
| Get the box type for the menu popup windows. More... | |
| void | menu_box (Fl_Boxtype b) |
| Set the box type for the menu popup windows. More... | |
| const Fl_Menu_Item * | menu_end () |
| Finishes menu modifications and returns menu(). More... | |
| int | mode (int i) const |
| Get the flags of item i. More... | |
| void | mode (int i, int fl) |
| Set the flags of item i. More... | |
| const Fl_Menu_Item * | mvalue () const |
| Return a pointer to the last menu item that was picked. More... | |
| const Fl_Menu_Item * | picked (const Fl_Menu_Item *) |
| When user picks a menu item, call this. More... | |
| const Fl_Menu_Item * | prev_mvalue () const |
| Return a pointer to the menu item that was picked before the current one was picked. More... | |
| void | remove (int) |
Deletes item i from the menu. More... | |
| void | replace (int, const char *) |
Changes the text of item i. More... | |
| void | setonly (Fl_Menu_Item *item) |
| Turns the radio item "on" for the menu item and turns "off" adjacent radio items of the same group. | |
| void | shortcut (int i, int s) |
Change the shortcut of item i to s. | |
| int | size () const |
| This returns the number of Fl_Menu_Item structures that make up the menu, correctly counting submenus. More... | |
| void | size (int W, int H) |
| const Fl_Menu_Item * | test_shortcut () |
| Returns the menu item with the entered shortcut (key value). More... | |
| const char * | text () const |
| Returns the title of the last item chosen. More... | |
| const char * | text (int i) const |
| Returns the title of item i. More... | |
| Fl_Color | textcolor () const |
| Get the current color of menu item labels. More... | |
| void | textcolor (Fl_Color c) |
| Sets the current color of menu item labels. | |
| Fl_Font | textfont () const |
| Gets the current font of menu item labels. More... | |
| void | textfont (Fl_Font c) |
| Sets the current font of menu item labels. More... | |
| Fl_Fontsize | textsize () const |
| Gets the font size of menu item labels. More... | |
| void | textsize (Fl_Fontsize c) |
| Sets the font size of menu item labels. More... | |
| int | value () const |
| Return the index into the menu() of the last item chosen by the user. More... | |
| int | value (const Fl_Menu_Item *) |
Set the value of a menu to the menu item m. More... | |
| int | value (int i) |
Set the value of the menu to index i. More... | |
| Public Member Functions inherited from Fl_Widget | |
| void | _clear_fullscreen () |
| void | _set_fullscreen () |
| void | activate () |
| Activates the widget. More... | |
| unsigned int | active () const |
| Returns whether the widget is active. More... | |
| int | active_r () const |
| Returns whether the widget and all of its parents are active. More... | |
| Fl_Align | align () const |
| Gets the label alignment. More... | |
| void | align (Fl_Align alignment) |
| Sets the label alignment. More... | |
| long | argument () const |
| Gets the current user data (long) argument that is passed to the callback function. More... | |
| void | argument (long v) |
| Sets the current user data (long) argument that is passed to the callback function. More... | |
| virtual class Fl_Gl_Window * | as_gl_window () |
| Returns an Fl_Gl_Window pointer if this widget is an Fl_Gl_Window. More... | |
| virtual class Fl_Gl_Window const * | as_gl_window () const |
| virtual Fl_Group * | as_group () |
| Returns an Fl_Group pointer if this widget is an Fl_Group. More... | |
| virtual Fl_Group const * | as_group () const |
| virtual Fl_Window * | as_window () |
| Returns an Fl_Window pointer if this widget is an Fl_Window. More... | |
| virtual Fl_Window const * | as_window () const |
| void | bind_deimage (Fl_Image *img) |
| Sets the image to use as part of the widget label when in the inactive state. More... | |
| void | bind_deimage (int f) |
| Bind the inactive image to the widget, so the widget will delete the image when it is no longer needed. More... | |
| void | bind_image (Fl_Image *img) |
| Sets the image to use as part of the widget label when in the active state. More... | |
| void | bind_image (int f) |
| Bind the image to the widget, so the widget will delete the image when it is no longer needed. More... | |
| Fl_Boxtype | box () const |
| Gets the box type of the widget. More... | |
| void | box (Fl_Boxtype new_box) |
| Sets the box type for the widget. More... | |
| Fl_Callback_p | callback () const |
| Gets the current callback function for the widget. More... | |
| void | callback (Fl_Callback *cb) |
| Sets the current callback function for the widget. More... | |
| void | callback (Fl_Callback *cb, Fl_Callback_User_Data *p, bool auto_free) |
| Sets the current callback function and managed user data for the widget. More... | |
| void | callback (Fl_Callback *cb, void *p) |
| Sets the current callback function and data for the widget. More... | |
| void | callback (Fl_Callback0 *cb) |
| Sets the current callback function for the widget. More... | |
| void | callback (Fl_Callback1 *cb, long p=0) |
| Sets the current callback function for the widget. More... | |
| unsigned int | changed () const |
| Checks if the widget value changed since the last callback. More... | |
| void | clear_active () |
| Marks the widget as inactive without sending events or changing focus. More... | |
| void | clear_changed () |
| Marks the value of the widget as unchanged. More... | |
| void | clear_damage (uchar c=0) |
| Clears or sets the damage flags. More... | |
| void | clear_output () |
| Sets a widget to accept input. More... | |
| void | clear_visible () |
| Hides the widget. More... | |
| void | clear_visible_focus () |
| Disables keyboard focus navigation with this widget. More... | |
| Fl_Color | color () const |
| Gets the background color of the widget. More... | |
| void | color (Fl_Color bg) |
| Sets the background color of the widget. More... | |
| void | color (Fl_Color bg, Fl_Color sel) |
| Sets the background and selection color of the widget. More... | |
| Fl_Color | color2 () const |
| For back compatibility only. More... | |
| void | color2 (unsigned a) |
| For back compatibility only. More... | |
| int | contains (const Fl_Widget *w) const |
| Checks if w is a child of this widget. More... | |
| void | copy_label (const char *new_label) |
| Sets the current label. More... | |
| void | copy_tooltip (const char *text) |
| Sets the current tooltip text. More... | |
| uchar | damage () const |
| Returns non-zero if draw() needs to be called. More... | |
| void | damage (uchar c) |
| Sets the damage bits for the widget. More... | |
| void | damage (uchar c, int x, int y, int w, int h) |
| Sets the damage bits for an area inside the widget. More... | |
| int | damage_resize (int, int, int, int) |
| Internal use only. | |
| void | deactivate () |
| Deactivates the widget. More... | |
| Fl_Image * | deimage () |
| Gets the image that is used as part of the widget label when in the inactive state. More... | |
| const Fl_Image * | deimage () const |
| Gets the image that is used as part of the widget label when in the inactive state. More... | |
| void | deimage (Fl_Image &img) |
| Sets the image to use as part of the widget label when in the inactive state. More... | |
| void | deimage (Fl_Image *img) |
| Sets the image to use as part of the widget label when in the inactive state. More... | |
| int | deimage_bound () const |
| Returns whether the inactive image is managed by the widget. More... | |
| void | do_callback (Fl_Callback_Reason reason=FL_REASON_UNKNOWN) |
| Calls the widget callback function with default arguments. More... | |
| void | do_callback (Fl_Widget *widget, long arg, Fl_Callback_Reason reason=FL_REASON_UNKNOWN) |
| Calls the widget callback function with arbitrary arguments. More... | |
| void | do_callback (Fl_Widget *widget, void *arg=0, Fl_Callback_Reason reason=FL_REASON_UNKNOWN) |
| Calls the widget callback function with arbitrary arguments. More... | |
| virtual void | draw ()=0 |
| Draws the widget. More... | |
| void | draw_label (int, int, int, int, Fl_Align) const |
| Draws the label in an arbitrary bounding box with an arbitrary alignment. More... | |
| int | h () const |
| Gets the widget height. More... | |
| virtual int | handle (int event) |
| Handles the specified event. More... | |
| virtual void | hide () |
| Makes a widget invisible. More... | |
| int | horizontal_label_margin () |
| Get the spacing between the label and the horizontal edge of the widget. More... | |
| void | horizontal_label_margin (int px) |
| Set the spacing between the label and the horizontal edge of the widget. More... | |
| Fl_Image * | image () |
| Gets the image that is used as part of the widget label when in the active state. More... | |
| const Fl_Image * | image () const |
| Gets the image that is used as part of the widget label when in the active state. More... | |
| void | image (Fl_Image &img) |
| Sets the image to use as part of the widget label when in the active state. More... | |
| void | image (Fl_Image *img) |
| Sets the image to use as part of the widget label when in the active state. More... | |
| int | image_bound () const |
| Returns whether the image is managed by the widget. More... | |
| int | inside (const Fl_Widget *wgt) const |
Checks if this widget is a child of wgt. More... | |
| int | is_label_copied () const |
| Returns whether the current label was assigned with copy_label(). More... | |
| const char * | label () const |
| Gets the current label text. More... | |
| void | label (const char *text) |
| Sets the current label pointer. More... | |
| void | label (Fl_Labeltype a, const char *b) |
| Shortcut to set the label text and type in one call. More... | |
| int | label_image_spacing () |
| Return the gap size between the label and the image. More... | |
| void | label_image_spacing (int gap) |
| Set the gap between the label and the image in pixels. More... | |
| Fl_Color | labelcolor () const |
| Gets the label color. More... | |
| void | labelcolor (Fl_Color c) |
| Sets the label color. More... | |
| Fl_Font | labelfont () const |
| Gets the font to use. More... | |
| void | labelfont (Fl_Font f) |
| Sets the font to use. More... | |
| Fl_Fontsize | labelsize () const |
| Gets the font size in pixels. More... | |
| void | labelsize (Fl_Fontsize pix) |
| Sets the font size in pixels. More... | |
| Fl_Labeltype | labeltype () const |
| Gets the label type. More... | |
| void | labeltype (Fl_Labeltype a) |
| Sets the label type. More... | |
| void | measure_label (int &ww, int &hh) const |
| Sets width ww and height hh accordingly with the label size. More... | |
| bool | needs_keyboard () const |
| Returns whether this widget needs a keyboard. More... | |
| void | needs_keyboard (bool needs) |
| Sets whether this widget needs a keyboard. More... | |
| unsigned int | output () const |
| Returns if a widget is used for output only. More... | |
| Fl_Group * | parent () const |
| Returns a pointer to the parent widget. More... | |
| void | parent (Fl_Group *p) |
| Internal use only - "for hacks only". More... | |
| void | position (int X, int Y) |
| Repositions the window or widget. More... | |
| void | redraw () |
| Schedules the drawing of the widget. More... | |
| void | redraw_label () |
| Schedules the drawing of the label. More... | |
| virtual void | resize (int x, int y, int w, int h) |
| Changes the size or position of the widget. More... | |
| Fl_Color | selection_color () const |
| Gets the selection color. More... | |
| void | selection_color (Fl_Color a) |
| Sets the selection color. More... | |
| void | set_active () |
| Marks the widget as active without sending events or changing focus. More... | |
| void | set_changed () |
| Marks the value of the widget as changed. More... | |
| void | set_output () |
| Sets a widget to output only. More... | |
| void | set_visible () |
| Makes the widget visible. More... | |
| void | set_visible_focus () |
| Enables keyboard focus navigation with this widget. More... | |
| int | shortcut_label () const |
| Returns whether the widget's label uses '&' to indicate shortcuts. More... | |
| void | shortcut_label (int value) |
| Sets whether the widget's label uses '&' to indicate shortcuts. More... | |
| virtual void | show () |
| Makes a widget visible. More... | |
| void | size (int W, int H) |
| Changes the size of the widget. More... | |
| int | take_focus () |
| Gives the widget the keyboard focus. More... | |
| unsigned int | takesevents () const |
| Returns if the widget is able to take events. More... | |
| int | test_shortcut () |
| Returns true if the widget's label contains the entered '&x' shortcut. More... | |
| const char * | tooltip () const |
| Gets the current tooltip text. More... | |
| void | tooltip (const char *text) |
| Sets the Tooltip Text for a Widget. More... | |
| Fl_Window * | top_window () const |
| Returns a pointer to the top-level window for the widget. More... | |
| Fl_Window * | top_window_offset (int &xoff, int &yoff) const |
| Finds the x/y offset of the current widget relative to the top-level window. More... | |
| uchar | type () const |
| Gets the widget type. More... | |
| void | type (uchar t) |
| Sets the widget type. More... | |
| int | use_accents_menu () |
| Returns non zero if MAC_USE_ACCENTS_MENU flag is set, 0 otherwise. | |
| void * | user_data () const |
| Gets the user data for this widget. More... | |
| void | user_data (Fl_Callback_User_Data *v, bool auto_free) |
| Sets the user data for this widget. | |
| void | user_data (void *v) |
| Sets the user data for this widget. | |
| int | vertical_label_margin () |
| Get the spacing between the label and the vertical edge of the widget. More... | |
| void | vertical_label_margin (int px) |
| Set the spacing between the label and the vertical edge of the widget. More... | |
| unsigned int | visible () const |
| Returns whether a widget is visible. More... | |
| unsigned int | visible_focus () const |
| Checks whether this widget has a visible focus. More... | |
| void | visible_focus (int v) |
| Modifies keyboard focus navigation. More... | |
| int | visible_r () const |
| Returns whether a widget and all its parents are visible. More... | |
| int | w () const |
| Gets the widget width. More... | |
| Fl_When | when () const |
| Returns the conditions under which the callback is called. More... | |
| void | when (uchar i) |
| Sets the flags used to decide when a callback is called. More... | |
| Fl_Window * | window () const |
| Returns a pointer to the nearest parent window up the widget hierarchy. More... | |
| int | x () const |
| Gets the widget position in its window. More... | |
| int | y () const |
| Gets the widget position in its window. More... | |
| virtual | ~Fl_Widget () |
| Destroys the widget. More... | |
Protected Member Functions | |
| void | draw () FL_OVERRIDE |
| Draws the widget. More... | |
| Protected Member Functions inherited from Fl_Menu_ | |
| int | item_pathname_ (char *name, int namelen, const Fl_Menu_Item *finditem, const Fl_Menu_Item *menu=0) const |
| Protected Member Functions inherited from Fl_Widget | |
| void | clear_flag (unsigned int c) |
| Clears a flag in the flags mask. | |
| void | draw_backdrop () const |
| If FL_ALIGN_IMAGE_BACKDROP is set, the image or deimage will be drawn. | |
| void | draw_box () const |
| Draws the widget box according its box style. | |
| void | draw_box (Fl_Boxtype t, Fl_Color c) const |
| Draws a box of type t, of color c at the widget's position and size. | |
| void | draw_box (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color c) const |
| Draws a box of type t, of color c at the position X,Y and size W,H. | |
| void | draw_focus () const |
| Draws a focus rectangle around the widget. More... | |
| void | draw_focus (Fl_Boxtype t, int X, int Y, int W, int H) const |
| Draws a focus rectangle around the widget. More... | |
| void | draw_focus (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color bg) const |
| Draws a focus box for the widget at the given position and size. More... | |
| void | draw_label () const |
| Draws the widget's label at the defined label position. More... | |
| void | draw_label (int, int, int, int) const |
| Draws the label in an arbitrary bounding box. More... | |
| Fl_Widget (int x, int y, int w, int h, const char *label=0L) | |
| Creates a widget at the given position and size. More... | |
| unsigned int | flags () const |
| Gets the widget flags mask. | |
| void | h (int v) |
| Internal use only. More... | |
| void | set_flag (unsigned int c) |
| Sets a flag in the flags mask. | |
| void | w (int v) |
| Internal use only. More... | |
| void | x (int v) |
| Internal use only. More... | |
| void | y (int v) |
| Internal use only. More... | |
Friends | |
| class | Fl_Sys_Menu_Bar_Driver |
Additional Inherited Members | |
| Static Public Member Functions inherited from Fl_Widget | |
| static void | default_callback (Fl_Widget *widget, void *data) |
| The default callback for all widgets that don't set a callback. More... | |
| static unsigned int | label_shortcut (const char *t) |
| Returns the Unicode value of the '&x' shortcut in a given text. More... | |
| static int | test_shortcut (const char *, const bool require_alt=false) |
Returns true if the given text t contains the entered '&x' shortcut. More... | |
| Protected Types inherited from Fl_Widget | |
| enum | { INACTIVE = 1<<0 , INVISIBLE = 1<<1 , OUTPUT = 1<<2 , NOBORDER = 1<<3 , FORCE_POSITION = 1<<4 , NON_MODAL = 1<<5 , SHORTCUT_LABEL = 1<<6 , CHANGED = 1<<7 , OVERRIDE = 1<<8 , VISIBLE_FOCUS = 1<<9 , COPIED_LABEL = 1<<10 , CLIP_CHILDREN = 1<<11 , MENU_WINDOW = 1<<12 , TOOLTIP_WINDOW = 1<<13 , MODAL = 1<<14 , NO_OVERLAY = 1<<15 , GROUP_RELATIVE = 1<<16 , COPIED_TOOLTIP = 1<<17 , FULLSCREEN = 1<<18 , MAC_USE_ACCENTS_MENU = 1<<19 , NEEDS_KEYBOARD = 1<<20 , IMAGE_BOUND = 1<<21 , DEIMAGE_BOUND = 1<<22 , AUTO_DELETE_USER_DATA = 1<<23 , MAXIMIZED = 1<<24 , POPUP = 1<<25 , USERFLAG3 = 1<<29 , USERFLAG2 = 1<<30 , USERFLAG1 = 1<<31 } |
| flags possible values enumeration. More... | |
| Protected Attributes inherited from Fl_Menu_ | |
| uchar | alloc |
| uchar | down_box_ |
| Fl_Boxtype | menu_box_ |
| Fl_Color | textcolor_ |
| Fl_Font | textfont_ |
| Fl_Fontsize | textsize_ |
Detailed Description
This widget provides a standard menubar interface.
Usually you will put this widget along the top edge of your window. The height of the widget should be 30 for the menu titles to draw correctly with the default font.
The items on the bar and the menus they bring up are defined by a single Fl_Menu_Item array. Because a Fl_Menu_Item array defines a hierarchy, the top level menu defines the items in the menubar, while the submenus define the pull-down menus. Sub-sub menus and lower pop up to the right of the submenus.
If there is an item in the top menu that is not a title of a submenu, then it acts like a "button" in the menubar. Clicking on it will pick it.
When the user clicks a menu item, value() is set to that item and then:
- The item's callback is done if one has been set; the Fl_Menu_Bar is passed as the Fl_Widget* argument, along with any userdata configured for the callback.
- If the item does not have a callback, the Fl_Menu_Bar's callback is done instead, along with any userdata configured for the callback. The callback can determine which item was picked using value(), mvalue(), item_pathname(), etc.
Submenus will also pop up in response to shortcuts indicated by putting a '&' character in the name field of the menu item. If you put a '&' character in a top-level "button" then the shortcut picks it. The '&' character in submenus is ignored until the menu is popped up.
Typing the shortcut() of any of the menu items will cause callbacks exactly the same as when you pick the item with the mouse.
FLTK triggers an FL_BEFORE_MENU event for this widget right before displaying the menu. This event provides an opportunity to update menu item states and activation.
Constructor & Destructor Documentation
◆ Fl_Menu_Bar()
| Fl_Menu_Bar::Fl_Menu_Bar | ( | int | X, |
| int | Y, | ||
| int | W, | ||
| int | H, | ||
| const char * | l = 0 |
||
| ) |
Creates a new Fl_Menu_Bar widget using the given position, size, and label string.
The default boxtype is FL_UP_BOX.
The constructor sets menu() to NULL. See Fl_Menu_ for the methods to set or change the menu.
labelsize(), labelfont(), and labelcolor() are used to control how the menubar items are drawn. They are initialized from the Fl_Menu static variables, but you can change them if desired.
label() is ignored unless you change align() to put it outside the menubar.
The destructor removes the Fl_Menu_Bar widget and all of its menu items.
Member Function Documentation
◆ draw()
|
protectedvirtual |
Draws the widget.
Never call this function directly. FLTK will schedule redrawing whenever needed. If your widget must be redrawn as soon as possible, call redraw() instead.
Override this function to draw your own widgets.
If you ever need to call another widget's draw method from within your own draw() method, e.g. for an embedded scrollbar, you can do it (because draw() is virtual) like this:
Fl_Widget *s = &scrollbar; // scrollbar is an embedded Fl_Scrollbar
s->draw(); // calls Fl_Scrollbar::draw()
Implements Fl_Widget.
Reimplemented in Fl_Sys_Menu_Bar.
◆ handle()
|
virtual |
Handles the specified event.
You normally don't call this method directly, but instead let FLTK do it when the user interacts with the widget.
When implemented in a widget, this function must return 0 if the widget does not use the event or 1 otherwise.
Most of the time, you want to call the inherited handle() method in your overridden method so that you don't short-circuit events that you don't handle. In this last case you should return the callee retval.
One exception to the rule in the previous paragraph is if you really want to override the behavior of the base class. This requires knowledge of the details of the inherited class.
In rare cases you may want to return 1 from your handle() method although you don't really handle the event. The effect would be to filter event processing, for instance if you want to dismiss non-numeric characters (keypresses) in a numeric input widget. You may "ring the bell" or show another visual indication or drop the event silently. In such a case you must not call the handle() method of the base class and tell FLTK that you consumed the event by returning 1 even if you didn't do anything with it.
- Parameters
-
[in] event the kind of event received
- Return values
-
0 if the event was not used or understood 1 if the event was used and can be deleted
- See also
- Fl_Event
Reimplemented from Fl_Widget.
◆ play_menu()
|
virtual |
Opens the 1st level submenu of the menubar corresponding to item.
- Since
- 1.4.0
Reimplemented in Fl_Sys_Menu_Bar.
◆ update()
|
inlinevirtual |
Updates the menu bar after any change to its items.
This is useful when the menu bar can be an Fl_Sys_Menu_Bar object.
Reimplemented in Fl_Sys_Menu_Bar.
The documentation for this class was generated from the following files:
- Fl_Menu_Bar.H
- Fl_Menu_Bar.cxx
