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/*
* tkButton.h --
*
* Declarations of types and functions used to implement
* button-like 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.
*
* RCS: @(#) $Id: tkButton.h,v 1.1.4.2 1998/09/30 02:16:41 stanton Exp $
*/
#ifndef _TKBUTTON
#define _TKBUTTON
#ifndef _TKINT
#include "tkInt.h"
#endif
#ifdef BUILD_tk
# undef TCL_STORAGE_CLASS
# define TCL_STORAGE_CLASS DLLEXPORT
#endif
/*
* Legal values for the "state" field of TkButton records.
*/
enum state {
STATE_ACTIVE, STATE_DISABLED, STATE_NORMAL
};
/*
* Legal values for the "defaultState" field of TkButton records.
*/
enum defaultState {
DEFAULT_ACTIVE, DEFAULT_DISABLED, DEFAULT_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 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, such as TYPE_LABEL:
* restricts operations that may be performed
* on widget. See below for legal values. */
Tk_OptionTable optionTable; /* Table that defines configuration options
* available for this widget. */
/*
* Information about what's in the button.
*/
Tcl_Obj *textPtr; /* Value of -text option: specifies text to
* display in button. */
int underline; /* Value of -underline option: specifies
* index of character to underline. < 0 means
* don't underline anything. */
Tcl_Obj *textVarNamePtr; /* Value of -textvariable option: specifies
* name of variable or NULL. If non-NULL,
* button displays the contents of this
* variable. */
Pixmap bitmap; /* Value of -bitmap option. If not None,
* specifies bitmap to display and text and
* textVar are ignored. */
Tcl_Obj *imagePtr; /* Value of -image option: specifies image
* to display in window, or NULL if none.
* If non-NULL, bitmap, text, and textVarName
* are ignored.*/
Tk_Image image; /* Derived from imagePtr by calling
* Tk_GetImage, or NULL if imagePtr is NULL. */
Tcl_Obj *selectImagePtr; /* Value of -selectimage option: specifies
* image to display in window when selected,
* or NULL if none. Ignored if imagePtr is
* NULL. */
Tk_Image selectImage; /* Derived from selectImagePtr by calling
* Tk_GetImage, or NULL if selectImagePtr
* is NULL. */
/*
* Information used when displaying widget:
*/
enum state state; /* Value of -state option: specifies
* state of button for display purposes.*/
Tk_3DBorder normalBorder; /* Value of -background option: specifies
* color for background (and border) when
* window isn't active. */
Tk_3DBorder activeBorder; /* Value of -activebackground option:
* this is the color used to draw 3-D border
* and background when widget is active. */
Tcl_Obj *borderWidthPtr; /* Value of -borderWidth option: specifies
* width of border in pixels. */
int borderWidth; /* Integer value corresponding to
* borderWidthPtr. Always >= 0. */
int relief; /* Value of -relief option: specifies 3-d
* effect for border, such as
* TK_RELIEF_RAISED. */
Tcl_Obj *highlightWidthPtr; /* Value of -highlightthickness option:
* specifies width in pixels of highlight to
* draw around widget when it has the focus.
* <= 0 means don't draw a highlight. */
int highlightWidth; /* Integer value corresponding to
* highlightWidthPtr. Always >= 0. */
Tk_3DBorder highlightBorder;/* Value of -highlightbackground option:
* specifies background with which to draw 3-D
* default ring and focus highlight area when
* highlight is off. */
XColor *highlightColorPtr; /* Value of -highlightcolor option:
* specifies 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; /* Value of -font option: specifies font
* to use for display text. */
XColor *normalFg; /* Value of -font option: specifies foreground
* color in normal mode. */
XColor *activeFg; /* Value of -activeforeground option:
* foreground color in active mode. NULL
* means use -foreground instead. */
XColor *disabledFg; /* Value of -disabledforeground option:
* 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). */
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. */
Pixmap gray; /* Pixmap for displaying disabled text if
* disabledFg is NULL. */
GC copyGC; /* Used for copying information from an
* off-screen pixmap to the screen. */
Tcl_Obj *widthPtr; /* Value of -width option. */
int width; /* Integer value corresponding to widthPtr. */
Tcl_Obj *heightPtr; /* Value of -height option. */
int height; /* Integer value corresponding to heightPtr. */
Tcl_Obj *wrapLengthPtr; /* Value of -wraplength option: specifies
* line length (in pixels) at which to wrap
* onto next line. <= 0 means don't wrap
* except at newlines. */
int wrapLength; /* Integer value corresponding to
* wrapLengthPtr. */
Tcl_Obj *padXPtr; /* Value of -padx option: specifies how many
* pixels of extra space to leave on left and
* right of text. Ignored for bitmaps and
* images. */
int padX; /* Integer value corresponding to padXPtr. */
Tcl_Obj *padYPtr; /* Value of -padx option: specifies how many
* pixels of extra space to leave above and
* below text. Ignored for bitmaps and
* images. */
int padY; /* Integer value corresponding to padYPtr. */
Tk_Anchor anchor; /* Value of -anchor option: specifies where
* text/bitmap should be displayed inside
* button region. */
Tk_Justify justify; /* Value of -justify option: specifies how
* to align lines of multi-line text. */
int indicatorOn; /* Value of -indicatoron option: 1 means
* draw indicator in checkbuttons and
* radiobuttons, 0 means don't draw it. */
Tk_3DBorder selectBorder; /* Value of -selectcolor option: specifies
* color 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. */
enum defaultState defaultState;
/* Value of -default option, such as
* DEFAULT_NORMAL: specifies state
* of default ring for buttons (normal,
* active, or disabled). NULL for other
* classes. */
/*
* For check and radio buttons, the fields below are used
* to manage the variable indicating the button's state.
*/
Tcl_Obj *selVarNamePtr; /* Value of -variable option: specifies name
* of variable used to control selected
* state of button. */
Tcl_Obj *onValuePtr; /* Value of -offvalue option: specifies value
* to store in variable when this button is
* selected. */
Tcl_Obj *offValuePtr; /* Value of -offvalue option: specifies value
* to store in variable when this button
* isn't selected. Used only by
* checkbuttons. */
/*
* Miscellaneous information:
*/
Tk_Cursor cursor; /* Value of -cursor option: if not None,
* specifies current cursor for window. */
Tcl_Obj *takeFocusPtr; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. */
Tcl_Obj *commandPtr; /* Value of -command option: specifies script
* to execute when button is invoked. If
* widget is label or has no command, this
* is NULL. */
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.
* BUTTON_DELETED: Non-zero needs that this button has been
* deleted, or is in the process of being
* deleted.
*/
#define REDRAW_PENDING 1
#define SELECTED 2
#define GOT_FOCUS 4
#define BUTTON_DELETED 0x8
/*
* Declaration of variables shared between the files in the button module.
*/
extern TkClassProcs tkpButtonProcs;
/*
* Declaration of procedures used in the implementation of the button
* widget.
*/
#ifndef TkpButtonSetDefaults
EXTERN void TkpButtonSetDefaults _ANSI_ARGS_((
Tk_OptionSpec *specPtr));
#endif
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));
# undef TCL_STORAGE_CLASS
# define TCL_STORAGE_CLASS DLLIMPORT
#endif /* _TKBUTTON */
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