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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.
*/
#ifndef _TKBUTTON
#define _TKBUTTON
#ifndef _TKINT
#include "tkInt.h"
#endif
/*
* Legal values for the "compound" field of TkButton records.
*/
enum compound {
COMPOUND_BOTTOM, COMPOUND_CENTER, COMPOUND_LEFT, COMPOUND_NONE,
COMPOUND_RIGHT, COMPOUND_TOP
};
/*
* 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. */
Tcl_Obj *tristateImagePtr; /* Value of -tristateimage option: specifies
* image to display in window when selected,
* or NULL if none. Ignored if imagePtr is
* NULL. */
Tk_Image tristateImage; /* Derived from tristateImagePtr by calling
* Tk_GetImage, or NULL if tristateImagePtr 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. */
int overRelief; /* Value of -overrelief option: specifies a
* 3-d effect for the border, such as
* TK_RELIEF_RAISED, to be used when the mouse
* is over the button. */
int offRelief; /* Value of -offrelief option: specifies a 3-d
* effect for the border, such as
* TK_RELIEF_RAISED, to be used when a
* checkbutton or radiobutton without
* indicator is off. */
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 for text
* and check/radio marks. */
GC stippleGC; /* Used to produce disabled stipple effect for
* images when disabled. */
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. */
Tcl_Obj *tristateValuePtr; /* Value of -tristatevalue option: specifies
* value to display Tristate or Multivalue
* mode when variable matches this value.
* Used by check- buttons. */
/*
* 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 compound; /* Value of -compound option; specifies
* whether the button should show both an
* image and text, and, if so, how. */
int repeatDelay; /* Value of -repeatdelay option; specifies the
* number of ms after which the button will
* start to auto-repeat its command. */
int repeatInterval; /* Value of -repeatinterval option; specifies
* the number of ms between auto-repeat
* invocataions of the button command. */
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 << 0)
#define SELECTED (1 << 1)
#define GOT_FOCUS (1 << 2)
#define BUTTON_DELETED (1 << 3)
#define TRISTATED (1 << 4)
/*
* Declaration of button class functions structure
* and button/label defaults, for use in optionSpecs.
*/
MODULE_SCOPE const Tk_ClassProcs tkpButtonProcs;
MODULE_SCOPE char tkDefButtonHighlightWidth[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefButtonPadx[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefButtonPady[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefButtonBorderWidth[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefLabelHighlightWidth[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefLabelPadx[TCL_INTEGER_SPACE];
MODULE_SCOPE char tkDefLabelPady[TCL_INTEGER_SPACE];
/*
* Declaration of functions used in the implementation of the button widget.
*/
#ifndef TkpButtonSetDefaults
MODULE_SCOPE void TkpButtonSetDefaults();
#endif
MODULE_SCOPE void TkButtonWorldChanged(ClientData instanceData);
MODULE_SCOPE void TkpComputeButtonGeometry(TkButton *butPtr);
MODULE_SCOPE TkButton *TkpCreateButton(Tk_Window tkwin);
#ifndef TkpDestroyButton
MODULE_SCOPE void TkpDestroyButton(TkButton *butPtr);
#endif
#ifndef TkpDisplayButton
MODULE_SCOPE void TkpDisplayButton(ClientData clientData);
#endif
MODULE_SCOPE int TkInvokeButton(TkButton *butPtr);
#endif /* _TKBUTTON */
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