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* tkMenu.h --
* Declarations shared among all of the files that implement menu
* widgets.
* Copyright (c) 1996-1998 by Sun Microsystems, Inc.
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
#ifndef _TKMENU
#define _TKMENU
#ifndef _TK
#include "tk.h"
#ifndef _TKINT
#include "tkInt.h"
#ifndef _DEFAULT
#include "default.h"
* Dummy types used by the platform menu code.
typedef struct TkMenuPlatformData_ *TkMenuPlatformData;
typedef struct TkMenuPlatformEntryData_ *TkMenuPlatformEntryData;
* Legal values for the "compound" field of TkMenuEntry and TkMenuButton
* records.
enum compound {
* Additional menu entry drawing parameters for Windows platform.
* DRAW_MENU_ENTRY_ARROW makes TkpDrawMenuEntry draw the arrow
* itself when cascade entry is disabled.
* is set, thus obeying the system-wide Windows UI setting.
enum drawingParameters {
* One of the following data structures is kept for each entry of each menu
* managed by this file:
typedef struct TkMenuEntry {
int type; /* Type of menu entry; see below for valid
* types. */
struct TkMenu *menuPtr; /* Menu with which this entry is
* associated. */
Tk_OptionTable optionTable; /* Option table for this menu entry. */
Tcl_Obj *labelPtr; /* Main text label displayed in entry (NULL if
* no label). */
int labelLength; /* Number of non-NULL characters in label. */
int state; /* State of button for display purposes:
* normal, active, or disabled. */
int underline; /* Value of -underline option: specifies index
* of character to underline (<0 means don't
* underline anything). */
Tcl_Obj *underlinePtr; /* Index of character to underline. */
Tcl_Obj *bitmapPtr; /* Bitmap to display in menu entry, or None.
* If not None then label is ignored. */
Tcl_Obj *imagePtr; /* Name of image to display, or NULL. If not
* NULL, bitmap, text, and textVarName are
* ignored. */
Tk_Image image; /* Image to display in menu entry, or NULL if
* none. */
Tcl_Obj *selectImagePtr; /* Name of image to display when selected, or
* NULL. */
Tk_Image selectImage; /* Image to display in entry when selected, or
* NULL if none. Ignored if image is NULL. */
Tcl_Obj *accelPtr; /* Accelerator string displayed at right of
* menu entry. NULL means no such accelerator.
* Malloc'ed. */
int accelLength; /* Number of non-NULL characters in
* accelerator. */
int indicatorOn; /* True means draw indicator, false means
* don't draw it. This field is ignored unless
* the entry is a radio or check button. */
* Display attributes
Tcl_Obj *borderPtr; /* Structure used to draw background for
* entry. NULL means use overall border for
* menu. */
Tcl_Obj *fgPtr; /* Foreground color to use for entry. NULL
* means use foreground color from menu. */
Tcl_Obj *activeBorderPtr; /* Used to draw background and border when
* element is active. NULL means use
* activeBorder from menu. */
Tcl_Obj *activeFgPtr; /* Foreground color to use when entry is
* active. NULL means use active foreground
* from menu. */
Tcl_Obj *indicatorFgPtr; /* Color for indicators in radio and check
* button entries. NULL means use indicatorFg
* GC from menu. */
Tcl_Obj *fontPtr; /* Text font for menu entries. NULL means use
* overall font for menu. */
int columnBreak; /* If this is 0, this item appears below the
* item in front of it. If this is 1, this
* item starts a new column. This field is
* always 0 for tearoff and separator
* entries. */
int hideMargin; /* If this is 0, then the item has enough
* margin to accomodate a standard check mark
* and a default right margin. If this is 1,
* then the item has no such margins, and
* checkbuttons and radiobuttons with this set
* will have a rectangle drawn in the
* indicator around the item if the item is
* checked. This is useful for palette menus.
* This field is ignored for separators and
* tearoffs. */
int indicatorSpace; /* The width of the indicator space for this
* entry. */
int labelWidth; /* Number of pixels to allow for displaying
* labels in menu entries. */
int compound; /* Value of -compound option; specifies
* whether the entry should show both an image
* and text, and, if so, how. */
* Information used to implement this entry's action:
Tcl_Obj *commandPtr; /* Command to invoke when entry is invoked.
* Malloc'ed. */
Tcl_Obj *namePtr; /* Name of variable (for check buttons and
* radio buttons) or menu (for cascade
* entries). Malloc'ed. */
Tcl_Obj *onValuePtr; /* Value to store in variable when selected
* (only for radio and check buttons).
* Malloc'ed. */
Tcl_Obj *offValuePtr; /* Value to store in variable when not
* selected (only for check buttons).
* Malloc'ed. */
* Information used for drawing this menu entry.
int width; /* Number of pixels occupied by entry in
* horizontal dimension. Not used except in
* menubars. The width of norma menus is
* dependent on the rest of the menu. */
int x; /* X-coordinate of leftmost pixel in entry. */
int height; /* Number of pixels occupied by entry in
* vertical dimension, including raised border
* drawn around entry when active. */
int y; /* Y-coordinate of topmost pixel in entry. */
GC textGC; /* GC for drawing text in entry. NULL means
* use overall textGC for menu. */
GC activeGC; /* GC for drawing text in entry when active.
* NULL means use overall activeGC for
* menu. */
GC disabledGC; /* Used to produce disabled effect for entry.
* NULL means use overall disabledGC from menu
* structure. See comments for disabledFg in
* menu structure for more information. */
GC indicatorGC; /* For drawing indicators. None means use GC
* from menu. */
* Miscellaneous fields.
int entryFlags; /* Various flags. See below for
* definitions. */
int index; /* Need to know which index we are. This is
* zero-based. This is the top-left entry of
* the menu. */
* Bookeeping for master menus and cascade menus.
struct TkMenuReferences *childMenuRefPtr;
/* A pointer to the hash table entry for the
* child menu. Stored here when the menu entry
* is configured so that a hash lookup is not
* necessary later.*/
struct TkMenuEntry *nextCascadePtr;
/* The next cascade entry that is a parent of
* this entry's child cascade menu. NULL end
* of list, this is not a cascade entry, or
* the menu that this entry point to does not
* yet exist. */
TkMenuPlatformEntryData platformEntryData;
/* The data for the specific type of menu.
* Depends on platform and menu type what kind
* of options are in this structure. */
} TkMenuEntry;
* Flag values defined for menu entries:
* ENTRY_SELECTED: Non-zero means this is a radio or check button
* and that it should be drawn in the "selected"
* state.
* ENTRY_NEEDS_REDISPLAY: Non-zero means the entry should be redisplayed.
* ENTRY_LAST_COLUMN: Used by the drawing code. If the entry is in
* the last column, the space to its right needs
* to be filled.
* ENTRY_PLATFORM_FLAG1 - 4 These flags are reserved for use by the
* platform-dependent implementation of menus
* and should not be used by anything else.
#define ENTRY_PLATFORM_FLAG1 (1 << 30)
#define ENTRY_PLATFORM_FLAG2 (1 << 29)
#define ENTRY_PLATFORM_FLAG3 (1 << 28)
#define ENTRY_PLATFORM_FLAG4 (1 << 27)
* Types defined for MenuEntries:
* Menu states
#define ENTRY_ACTIVE 0
#define ENTRY_NORMAL 1
* A data structure of the following type is kept for each menu widget:
typedef struct TkMenu {
Tk_Window tkwin; /* Window that embodies the pane. NULL means
* that the window has been destroyed but the
* data structures haven't yet been cleaned
* up. */
Display *display; /* Display containing widget. Needed, among
* other things, so that resources can be
* freed up even after tkwin has gone away. */
Tcl_Interp *interp; /* Interpreter associated with menu. */
Tcl_Command widgetCmd; /* Token for menu's widget command. */
TkMenuEntry **entries; /* Array of pointers to all the entries in the
* menu. NULL means no entries. */
int numEntries; /* Number of elements in entries. */
int active; /* Index of active entry. -1 means nothing
* active. */
* below for definitions. */
Tcl_Obj *menuTypePtr; /* Used to control whether created tkwin is a
* toplevel or not. "normal", "menubar", or
* "toplevel" */
* Information used when displaying widget:
Tcl_Obj *borderPtr; /* Structure used to draw 3-D border and
* background for menu. */
Tcl_Obj *borderWidthPtr; /* Width of border around whole menu. */
Tcl_Obj *activeBorderPtr; /* Used to draw background and border for
* active element (if any). */
Tcl_Obj *activeBorderWidthPtr;
/* Width of border around active element. */
Tcl_Obj *reliefPtr; /* 3-d effect: TK_RELIEF_RAISED, etc. */
Tcl_Obj *fontPtr; /* Text font for menu entries. */
Tcl_Obj *fgPtr; /* Foreground color for entries. */
Tcl_Obj *disabledFgPtr; /* Foreground color when disabled. NULL means
* use normalFg with a 50% stipple instead. */
Tcl_Obj *activeFgPtr; /* Foreground color for active entry. */
Tcl_Obj *indicatorFgPtr; /* Color for indicators in radio and check
* button entries. */
Pixmap gray; /* Bitmap for drawing disabled entries in a
* stippled fashion. None means not allocated
* yet. */
GC textGC; /* GC for drawing text and other features of
* menu entries. */
GC disabledGC; /* Used to produce disabled effect. If
* disabledFg isn't NULL, this GC is used to
* draw text and icons for disabled entries.
* Otherwise text and icons are drawn with
* normalGC and this GC is used to stipple
* background across them. */
GC activeGC; /* GC for drawing active entry. */
GC indicatorGC; /* For drawing indicators. */
GC disabledImageGC; /* Used for drawing disabled images. They have
* to be stippled. This is created when the
* image is about to be drawn the first
* time. */
* Information about geometry of menu.
int totalWidth; /* Width of entire menu. */
int totalHeight; /* Height of entire menu. */
* Miscellaneous information:
int tearoff; /* 1 means this menu can be torn off. On some
* platforms, the user can drag an outline of
* the menu by just dragging outside of the
* menu, and the tearoff is created where the
* mouse is released. On others, an indicator
* (such as a dashed stripe) is drawn, and
* when the menu is selected, the tearoff is
* created. */
Tcl_Obj *titlePtr; /* The title to use when this menu is torn
* off. If this is NULL, a default scheme will
* be used to generate a title for tearoff. */
Tcl_Obj *tearoffCommandPtr; /* If non-NULL, points to a command to run
* whenever the menu is torn-off. */
Tcl_Obj *takeFocusPtr; /* Value of -takefocus option; not used in the
* C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
Tcl_Obj *cursorPtr; /* Current cursor for window, or None. */
Tcl_Obj *postCommandPtr; /* Used to detect cycles in cascade hierarchy
* trees when preprocessing postcommands on
* some platforms. See PostMenu for more
* details. */
int postCommandGeneration; /* Need to do pre-invocation post command
* traversal. */
int menuFlags; /* Flags for use by X; see below for
* definition. */
TkMenuEntry *postedCascade; /* Points to menu entry for cascaded submenu
* that is currently posted or NULL if no
* submenu posted. */
struct TkMenu *nextInstancePtr;
/* The next instance of this menu in the
* chain. */
struct TkMenu *masterMenuPtr;
/* A pointer to the original menu for this
* clone chain. Points back to this structure
* if this menu is a master menu. */
void *reserved1; /* not used any more. */
Tk_Window parentTopLevelPtr;/* If this menu is a menubar, this is the
* toplevel that owns the menu. Only
* applicable for menubar clones. */
struct TkMenuReferences *menuRefPtr;
/* Each menu is hashed into a table with the
* name of the menu's window as the key. The
* information in this hash table includes a
* pointer to the menu (so that cascades can
* find this menu), a pointer to the list of
* toplevel widgets that have this menu as its
* menubar, and a list of menu entries that
* have this menu specified as a cascade. */
TkMenuPlatformData platformData;
/* The data for the specific type of menu.
* Depends on platform and menu type what kind
* of options are in this structure. */
Tk_OptionSpec *extensionPtr;/* Needed by the configuration package for
* this widget to be extended. */
Tk_SavedOptions *errorStructPtr;
/* We actually have to allocate these because
* multiple menus get changed during one
* ConfigureMenu call. */
} TkMenu;
* When the toplevel configure -menu command is executed, the menu may not
* exist yet. We need to keep a linked list of windows that reference a
* particular menu.
typedef struct TkMenuTopLevelList {
struct TkMenuTopLevelList *nextPtr;
/* The next window in the list. */
Tk_Window tkwin; /* The window that has this menu as its
* menubar. */
} TkMenuTopLevelList;
* The following structure is used to keep track of things which reference a
* menu. It is created when:
* - a menu is created.
* - a cascade entry is added to a menu with a non-null name
* - the "-menu" configuration option is used on a toplevel widget with a
* non-null parameter.
* One of these three fields must be non-NULL, but any of the fields may be
* NULL. This structure makes it easy to determine whether or not anything
* like recalculating platform data or geometry is necessary when one of the
* three actions above is performed.
typedef struct TkMenuReferences {
struct TkMenu *menuPtr; /* The menu data structure. This is NULL if
* the menu does not exist. */
TkMenuTopLevelList *topLevelListPtr;
/* First in the list of all toplevels that
* have this menu as its menubar. NULL if no
* toplevel widgets have this menu as its
* menubar. */
TkMenuEntry *parentEntryPtr;/* First in the list of all cascade menu
* entries that have this menu as their child.
* NULL means no cascade entries. */
Tcl_HashEntry *hashEntryPtr;/* This is needed because the pathname of the
* window (which is what we hash on) may not
* be around when we are deleting. */
} TkMenuReferences;
* Flag bits for menus:
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler has
* already been queued to redraw this window.
* RESIZE_PENDING: Non-zero means a call to ComputeMenuGeometry
* has already been scheduled.
* MENU_DELETION_PENDING Non-zero means that we are currently
* destroying this menu's internal structures.
* This is useful when we are in the middle of
* cleaning this master menu's chain of menus up
* when TkDestroyMenu was called again on this
* menu (via a destroy binding or somesuch).
* MENU_WIN_DESTRUCTION_PENDING Non-zero means we are in the middle of
* destroying this menu's Tk_Window.
* MENU_PLATFORM_FLAG1... Reserved for use by the platform-specific menu
* code.
#define MENU_PLATFORM_FLAG1 (1 << 30)
#define MENU_PLATFORM_FLAG2 (1 << 29)
#define MENU_PLATFORM_FLAG3 (1 << 28)
* Each menu created by the user is a MASTER_MENU. When a menu is torn off, a
* TEAROFF_MENU instance is created. When a menu is assigned to a toplevel as
* a menu bar, a MENUBAR instance is created. All instances have the same
* configuration information. If the master instance is deleted, all instances
* are deleted. If one of the other instances is deleted, only that instance
* is deleted.
#define UNKNOWN_TYPE -1
#define MASTER_MENU 0
#define TEAROFF_MENU 1
#define MENUBAR 2
* Various geometry definitions:
* Menu-related functions that are shared among Tk modules but not exported to
* the outside world:
MODULE_SCOPE int TkActivateMenuEntry(TkMenu *menuPtr, int index);
MODULE_SCOPE void TkBindMenu(Tk_Window tkwin, TkMenu *menuPtr);
MODULE_SCOPE TkMenuReferences*TkCreateMenuReferences(Tcl_Interp *interp,
const char *name);
MODULE_SCOPE void TkDestroyMenu(TkMenu *menuPtr);
MODULE_SCOPE void TkEventuallyRecomputeMenu(TkMenu *menuPtr);
MODULE_SCOPE void TkEventuallyRedrawMenu(TkMenu *menuPtr,
TkMenuEntry *mePtr);
MODULE_SCOPE TkMenuReferences*TkFindMenuReferences(Tcl_Interp *interp, const char *name);
MODULE_SCOPE TkMenuReferences*TkFindMenuReferencesObj(Tcl_Interp *interp,
Tcl_Obj *namePtr);
MODULE_SCOPE int TkFreeMenuReferences(TkMenuReferences *menuRefPtr);
MODULE_SCOPE Tcl_HashTable *TkGetMenuHashTable(Tcl_Interp *interp);
MODULE_SCOPE int TkGetMenuIndex(Tcl_Interp *interp, TkMenu *menuPtr,
Tcl_Obj *objPtr, int lastOK, int *indexPtr);
MODULE_SCOPE void TkMenuInitializeDrawingFields(TkMenu *menuPtr);
MODULE_SCOPE void TkMenuInitializeEntryDrawingFields(TkMenuEntry *mePtr);
MODULE_SCOPE int TkInvokeMenu(Tcl_Interp *interp, TkMenu *menuPtr,
int index);
MODULE_SCOPE void TkMenuConfigureDrawOptions(TkMenu *menuPtr);
MODULE_SCOPE int TkMenuConfigureEntryDrawOptions(
TkMenuEntry *mePtr, int index);
MODULE_SCOPE void TkMenuFreeDrawOptions(TkMenu *menuPtr);
MODULE_SCOPE void TkMenuEntryFreeDrawOptions(TkMenuEntry *mePtr);
MODULE_SCOPE void TkMenuEventProc(ClientData clientData,
XEvent *eventPtr);
MODULE_SCOPE void TkMenuImageProc(ClientData clientData, int x, int y,
int width, int height, int imgWidth,
int imgHeight);
MODULE_SCOPE void TkMenuInit(void);
MODULE_SCOPE void TkMenuSelectImageProc(ClientData clientData, int x,
int y, int width, int height, int imgWidth,
int imgHeight);
MODULE_SCOPE Tcl_Obj * TkNewMenuName(Tcl_Interp *interp,
Tcl_Obj *parentNamePtr, TkMenu *menuPtr);
MODULE_SCOPE int TkPostCommand(TkMenu *menuPtr);
MODULE_SCOPE int TkPostSubmenu(Tcl_Interp *interp, TkMenu *menuPtr,
TkMenuEntry *mePtr);
MODULE_SCOPE int TkPostTearoffMenu(Tcl_Interp *interp, TkMenu *menuPtr,
int x, int y);
MODULE_SCOPE int TkPreprocessMenu(TkMenu *menuPtr);
MODULE_SCOPE void TkRecomputeMenu(TkMenu *menuPtr);
* These routines are the platform-dependent routines called by the common
* code.
MODULE_SCOPE void TkpComputeMenubarGeometry(TkMenu *menuPtr);
MODULE_SCOPE void TkpComputeStandardMenuGeometry(TkMenu *menuPtr);
MODULE_SCOPE int TkpConfigureMenuEntry(TkMenuEntry *mePtr);
MODULE_SCOPE void TkpDestroyMenu(TkMenu *menuPtr);
MODULE_SCOPE void TkpDestroyMenuEntry(TkMenuEntry *mEntryPtr);
MODULE_SCOPE void TkpDrawMenuEntry(TkMenuEntry *mePtr,
Drawable d, Tk_Font tkfont,
const Tk_FontMetrics *menuMetricsPtr, int x,
int y, int width, int height, int strictMotif,
int drawingParameters);
MODULE_SCOPE void TkpMenuInit(void);
MODULE_SCOPE int TkpMenuNewEntry(TkMenuEntry *mePtr);
MODULE_SCOPE int TkpNewMenu(TkMenu *menuPtr);
MODULE_SCOPE int TkpPostMenu(Tcl_Interp *interp, TkMenu *menuPtr,
int x, int y);
MODULE_SCOPE void TkpSetWindowMenuBar(Tk_Window tkwin, TkMenu *menuPtr);
#endif /* _TKMENU */