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/*
* tkMenubutton.h --
*
* Declarations of types and functions used to implement the menubutton
* widget.
*
* Copyright (c) 1996-1997 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 _TKMENUBUTTON
#define _TKMENUBUTTON
#ifndef _TKINT
#include "tkInt.h"
#endif
#ifndef _TKMENU
#include "tkMenu.h"
#endif
/*
* Legal values for the "orient" field of TkMenubutton records.
*/
enum direction {
DIRECTION_ABOVE, DIRECTION_BELOW, DIRECTION_FLUSH,
DIRECTION_LEFT, DIRECTION_RIGHT
};
/*
* Legal values for the "state" field of TkMenubutton records.
*/
enum state {
STATE_ACTIVE, STATE_DISABLED, STATE_NORMAL
};
/*
* A data structure of the following type is kept for each widget managed by
* this file:
*/
typedef struct {
Tk_Window tkwin; /* Window that embodies the widget. 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 bee
* freed up even after tkwin has gone away. */
Tcl_Interp *interp; /* Interpreter associated with menubutton. */
Tcl_Command widgetCmd; /* Token for menubutton's widget command. */
Tk_OptionTable optionTable; /* Table that defines configuration options
* available for this widget. */
char *menuName; /* Name of menu associated with widget.
* Malloc-ed. */
/*
* Information about what's displayed in the menu button:
*/
char *text; /* Text to display in button (malloc'ed) or
* NULL. */
int underline; /* Index of character to underline. */
char *textVarName; /* Name of variable (malloc'ed) or NULL. If
* non-NULL, button displays the contents of
* this variable. */
Pixmap bitmap; /* Bitmap to display or None. If not None then
* text and textVar and underline are
* ignored. */
char *imageString; /* Name of image to display (malloc'ed), or
* NULL. If non-NULL, bitmap, text, and
* textVarName are ignored. */
Tk_Image image; /* Image to display in window, or NULL if
* none. */
/*
* Information used when displaying widget:
*/
enum state state; /* State of button for display purposes:
* normal, active, or disabled. */
Tk_3DBorder normalBorder; /* Structure used to draw 3-D border and
* background when window isn't active. NULL
* means no such border exists. */
Tk_3DBorder activeBorder; /* Structure used to draw 3-D border and
* background when window is active. NULL
* means no such border exists. */
int borderWidth; /* Width of border. */
int relief; /* 3-d effect: TK_RELIEF_RAISED, etc. */
int highlightWidth; /* Width in pixels of highlight to draw around
* widget when it has the focus. <= 0 means
* don't draw a highlight. */
XColor *highlightBgColorPtr;/* Color for drawing traversal highlight area
* when highlight is off. */
XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
int inset; /* Total width of all borders, including
* traversal highlight and 3-D border.
* Indicates how much interior stuff must be
* offset from outside edges to leave room for
* borders. */
Tk_Font tkfont; /* Information about text font, or NULL. */
XColor *normalFg; /* Foreground color in normal mode. */
XColor *activeFg; /* Foreground color in active mode. NULL means
* use normalFg instead. */
XColor *disabledFg; /* Foreground color when disabled. NULL means
* use normalFg with a 50% stipple instead. */
GC normalTextGC; /* GC for drawing text in normal mode. */
GC activeTextGC; /* GC for drawing text in active mode (NULL
* means use normalTextGC). */
Pixmap gray; /* Pixmap for displaying disabled text/icon if
* disabledFg is NULL. */
GC disabledGC; /* Used to produce disabled effect for
* text. */
GC stippleGC; /* Used to produce disabled stipple effect for
* images when disabled. */
int leftBearing; /* Distance from text origin to leftmost drawn
* pixel (positive means to right). */
int rightBearing; /* Amount text sticks right from its
* origin. */
char *widthString; /* Value of -width option. Malloc'ed. */
char *heightString; /* Value of -height option. Malloc'ed. */
int width, height; /* If > 0, these specify dimensions to request
* for window, in characters for text and in
* pixels for bitmaps. In this case the actual
* size of the text string or bitmap is
* ignored in computing desired window
* size. */
int wrapLength; /* Line length (in pixels) at which to wrap
* onto next line. <= 0 means don't wrap
* except at newlines. */
int padX, padY; /* Extra space around text or bitmap (pixels
* on each side). */
Tk_Anchor anchor; /* Where text/bitmap should be displayed
* inside window region. */
Tk_Justify justify; /* Justification to use for multi-line
* text. */
int textWidth; /* Width needed to display text as requested,
* in pixels. */
int textHeight; /* Height needed to display text as requested,
* in pixels. */
Tk_TextLayout textLayout; /* Saved text layout information. */
int indicatorOn; /* Non-zero means display indicator; 0 means
* don't display. */
int indicatorHeight; /* Height of indicator in pixels. This same
* amount of extra space is also left on each
* side of the indicator. 0 if no
* indicator. */
int indicatorWidth; /* Width of indicator in pixels, including
* indicatorHeight in padding on each side. 0
* if no indicator. */
/*
* Miscellaneous information:
*/
int compound; /* Value of -compound option; specifies
* whether the menubutton should show both an
* image and text, and, if so, how. */
enum direction direction; /* Direction for where to pop the menu. Valid
* directions are "above", "below", "left",
* "right", and "flush". "flush" means that
* the upper left corner of the menubutton is
* where the menu pops up. "above" and "below"
* will attempt to pop the menu compleletly
* above or below the menu respectively.
* "left" and "right" will pop the menu left
* or right, and the active item will be next
* to the button. */
Tk_Cursor cursor; /* Current cursor for window, or NULL. */
char *takeFocus; /* Value of -takefocus option; not used in the
* C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
int flags; /* Various flags; see below for
* definitions. */
} TkMenuButton;
/*
* Flag bits for buttons:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler has
* already been queued to redraw this window.
* POSTED: Non-zero means that the menu associated with
* this button has been posted (typically because
* of an active button press).
* GOT_FOCUS: Non-zero means this button currently has the
* input focus.
*/
#define REDRAW_PENDING 1
#define POSTED 2
#define GOT_FOCUS 4
/*
* The following constants define the dimensions of the cascade indicator,
* which is displayed if the "-indicatoron" option is true. The units for
* these options are 1/10 millimeters.
*/
#define INDICATOR_WIDTH 40
#define INDICATOR_HEIGHT 17
/*
* Declaration of procedures used in the implementation of the button widget.
*/
MODULE_SCOPE void TkpComputeMenuButtonGeometry(TkMenuButton *mbPtr);
MODULE_SCOPE TkMenuButton *TkpCreateMenuButton(Tk_Window tkwin);
MODULE_SCOPE void TkpDisplayMenuButton(ClientData clientData);
MODULE_SCOPE void TkpDestroyMenuButton(TkMenuButton *mbPtr);
MODULE_SCOPE void TkMenuButtonWorldChanged(ClientData instanceData);
#endif /* _TKMENUBUTTON */
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