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/*
* tkButton.h --
*
* Declarations of types and functions used to implement
* button-like widgets.
*
* Copyright (c) 1996 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.
*
* SCCS: @(#) tkButton.h 1.5 97/06/06 11:19:24
*/
#ifndef _TKBUTTON
#define _TKBUTTON
#ifndef _TKINT
#include "tkInt.h"
#endif
/*
* 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 button. NULL
* means that the window has been destroyed. */
Display *display; /* Display containing widget. Needed to
* free up resources after tkwin is gone. */
Tcl_Interp *interp; /* Interpreter associated with button. */
Tcl_Command widgetCmd; /* Token for button's widget command. */
int type; /* Type of widget: restricts operations
* that may be performed on widget. See
* below for possible values. */
/*
* Information about what's in the button.
*/
char *text; /* Text to display in button (malloc'ed)
* or NULL. */
int underline; /* Index of character to underline. < 0 means
* don't underline anything. */
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 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. */
char *selectImageString; /* Name of image to display when selected
* (malloc'ed), or NULL. */
Tk_Image selectImage; /* Image to display in window when selected,
* or NULL if none. Ignored if image is
* NULL. */
/*
* Information used when displaying widget:
*/
Tk_Uid 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. */
Tk_3DBorder highlightBorder;
/* Structure used to draw 3-D default ring
* and focus 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. Also
* used to copy from off-screen pixmap onto
* screen. */
GC activeTextGC; /* GC for drawing text in active mode (NULL
* means use normalTextGC). */
Pixmap gray; /* Pixmap for displaying disabled text if
* disabledFg is NULL. */
GC disabledGC; /* Used to produce disabled effect. If
* disabledFg isn't NULL, this GC is used to
* draw button text or icon. Otherwise
* text or icon is drawn with normalGC and
* this GC is used to stipple background
* across it. For labels this is None. */
GC copyGC; /* Used for copying information from an
* off-screen pixmap to the screen. */
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 (pixels to leave
* on each side). Ignored for bitmaps and
* images. */
Tk_Anchor anchor; /* Where text/bitmap should be displayed
* inside button region. */
Tk_Justify justify; /* Justification to use for multi-line text. */
int indicatorOn; /* True means draw indicator, false means
* don't draw it. */
Tk_3DBorder selectBorder; /* For drawing indicator background, or perhaps
* widget background, when selected. */
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 indicatorSpace; /* Horizontal space (in pixels) allocated for
* display of indicator. */
int indicatorDiameter; /* Diameter of indicator, in pixels. */
Tk_Uid defaultState; /* State of default ring: normal, active, or
* disabled. */
/*
* For check and radio buttons, the fields below are used
* to manage the variable indicating the button's state.
*/
char *selVarName; /* Name of variable used to control selected
* state of button. Malloc'ed (if
* not NULL). */
char *onValue; /* Value to store in variable when
* this button is selected. Malloc'ed (if
* not NULL). */
char *offValue; /* Value to store in variable when this
* button isn't selected. Malloc'ed
* (if not NULL). Valid only for check
* buttons. */
/*
* Miscellaneous information:
*/
Tk_Cursor cursor; /* Current cursor for window, or None. */
char *takeFocus; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
char *command; /* Command to execute when button is
* invoked; valid for buttons only.
* If not NULL, it's malloc-ed. */
int flags; /* Various flags; see below for
* definitions. */
} TkButton;
/*
* Possible "type" values for buttons. These are the kinds of
* widgets supported by this file. The ordering of the type
* numbers is significant: greater means more features and is
* used in the code.
*/
#define TYPE_LABEL 0
#define TYPE_BUTTON 1
#define TYPE_CHECK_BUTTON 2
#define TYPE_RADIO_BUTTON 3
/*
* Flag bits for buttons:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* SELECTED: Non-zero means this button is selected,
* so special highlight should be drawn.
* GOT_FOCUS: Non-zero means this button currently
* has the input focus.
*/
#define REDRAW_PENDING 1
#define SELECTED 2
#define GOT_FOCUS 4
/*
* Mask values used to selectively enable entries in the
* configuration specs:
*/
#define LABEL_MASK TK_CONFIG_USER_BIT
#define BUTTON_MASK TK_CONFIG_USER_BIT << 1
#define CHECK_BUTTON_MASK TK_CONFIG_USER_BIT << 2
#define RADIO_BUTTON_MASK TK_CONFIG_USER_BIT << 3
#define ALL_MASK (LABEL_MASK | BUTTON_MASK \
| CHECK_BUTTON_MASK | RADIO_BUTTON_MASK)
/*
* Declaration of variables shared between the files in the button module.
*/
extern TkClassProcs tkpButtonProcs;
extern Tk_ConfigSpec tkpButtonConfigSpecs[];
/*
* Declaration of procedures used in the implementation of the button
* widget.
*/
EXTERN void TkButtonWorldChanged _ANSI_ARGS_((
ClientData instanceData));
EXTERN void TkpComputeButtonGeometry _ANSI_ARGS_((
TkButton *butPtr));
EXTERN TkButton * TkpCreateButton _ANSI_ARGS_((Tk_Window tkwin));
#ifndef TkpDestroyButton
EXTERN void TkpDestroyButton _ANSI_ARGS_((TkButton *butPtr));
#endif
#ifndef TkpDisplayButton
EXTERN void TkpDisplayButton _ANSI_ARGS_((ClientData clientData));
#endif
EXTERN int TkInvokeButton _ANSI_ARGS_((TkButton *butPtr));
#endif /* _TKBUTTON */
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