323 lines
12 KiB
C
323 lines
12 KiB
C
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/*
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* tkButton.h --
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*
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* Declarations of types and functions used to implement button-like
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* widgets.
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*
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* Copyright (c) 1996-1998 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution of
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* this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*/
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#ifndef _TKBUTTON
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#define _TKBUTTON
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#ifndef _TKINT
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#include "tkInt.h"
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#endif
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/*
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* Legal values for the "compound" field of TkButton records.
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*/
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enum compound {
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COMPOUND_BOTTOM, COMPOUND_CENTER, COMPOUND_LEFT, COMPOUND_NONE,
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COMPOUND_RIGHT, COMPOUND_TOP
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};
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/*
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* Legal values for the "state" field of TkButton records.
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*/
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enum state {
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STATE_ACTIVE, STATE_DISABLED, STATE_NORMAL
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};
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/*
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* Legal values for the "defaultState" field of TkButton records.
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*/
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enum defaultState {
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DEFAULT_ACTIVE, DEFAULT_DISABLED, DEFAULT_NORMAL
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};
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/*
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* A data structure of the following type is kept for each widget managed by
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* this file:
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*/
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typedef struct {
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Tk_Window tkwin; /* Window that embodies the button. NULL means
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* that the window has been destroyed. */
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Display *display; /* Display containing widget. Needed to free
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* up resources after tkwin is gone. */
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Tcl_Interp *interp; /* Interpreter associated with button. */
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Tcl_Command widgetCmd; /* Token for button's widget command. */
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int type; /* Type of widget, such as TYPE_LABEL:
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* restricts operations that may be performed
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* on widget. See below for legal values. */
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Tk_OptionTable optionTable; /* Table that defines configuration options
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* available for this widget. */
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/*
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* Information about what's in the button.
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*/
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Tcl_Obj *textPtr; /* Value of -text option: specifies text to
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* display in button. */
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int underline; /* Value of -underline option: specifies index
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* of character to underline. < 0 means don't
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* underline anything. */
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Tcl_Obj *textVarNamePtr; /* Value of -textvariable option: specifies
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* name of variable or NULL. If non-NULL,
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* button displays the contents of this
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* variable. */
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Pixmap bitmap; /* Value of -bitmap option. If not None,
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* specifies bitmap to display and text and
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* textVar are ignored. */
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Tcl_Obj *imagePtr; /* Value of -image option: specifies image to
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* display in window, or NULL if none. If
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* non-NULL, bitmap, text, and textVarName are
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* ignored.*/
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Tk_Image image; /* Derived from imagePtr by calling
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* Tk_GetImage, or NULL if imagePtr is
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* NULL. */
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Tcl_Obj *selectImagePtr; /* Value of -selectimage option: specifies
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* image to display in window when selected,
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* or NULL if none. Ignored if imagePtr is
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* NULL. */
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Tk_Image selectImage; /* Derived from selectImagePtr by calling
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* Tk_GetImage, or NULL if selectImagePtr is
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* NULL. */
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Tcl_Obj *tristateImagePtr; /* Value of -tristateimage option: specifies
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* image to display in window when selected,
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* or NULL if none. Ignored if imagePtr is
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* NULL. */
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Tk_Image tristateImage; /* Derived from tristateImagePtr by calling
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* Tk_GetImage, or NULL if tristateImagePtr is
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* NULL. */
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/*
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* Information used when displaying widget:
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*/
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enum state state; /* Value of -state option: specifies state of
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* button for display purposes.*/
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Tk_3DBorder normalBorder; /* Value of -background option: specifies
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* color for background (and border) when
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* window isn't active. */
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Tk_3DBorder activeBorder; /* Value of -activebackground option: this is
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* the color used to draw 3-D border and
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* background when widget is active. */
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Tcl_Obj *borderWidthPtr; /* Value of -borderWidth option: specifies
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* width of border in pixels. */
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int borderWidth; /* Integer value corresponding to
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* borderWidthPtr. Always >= 0. */
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int relief; /* Value of -relief option: specifies 3-d
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* effect for border, such as
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* TK_RELIEF_RAISED. */
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int overRelief; /* Value of -overrelief option: specifies a
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* 3-d effect for the border, such as
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* TK_RELIEF_RAISED, to be used when the mouse
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* is over the button. */
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int offRelief; /* Value of -offrelief option: specifies a 3-d
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* effect for the border, such as
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* TK_RELIEF_RAISED, to be used when a
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* checkbutton or radiobutton without
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* indicator is off. */
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Tcl_Obj *highlightWidthPtr; /* Value of -highlightthickness option:
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* specifies width in pixels of highlight to
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* draw around widget when it has the focus.
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* <= 0 means don't draw a highlight. */
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int highlightWidth; /* Integer value corresponding to
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* highlightWidthPtr. Always >= 0. */
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Tk_3DBorder highlightBorder;/* Value of -highlightbackground option:
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* specifies background with which to draw 3-D
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* default ring and focus highlight area when
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* highlight is off. */
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XColor *highlightColorPtr; /* Value of -highlightcolor option: specifies
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* color for drawing traversal highlight. */
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int inset; /* Total width of all borders, including
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* traversal highlight and 3-D border.
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* Indicates how much interior stuff must be
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* offset from outside edges to leave room for
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* borders. */
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Tk_Font tkfont; /* Value of -font option: specifies font to
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* use for display text. */
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XColor *normalFg; /* Value of -font option: specifies foreground
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* color in normal mode. */
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XColor *activeFg; /* Value of -activeforeground option:
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* foreground color in active mode. NULL means
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* use -foreground instead. */
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XColor *disabledFg; /* Value of -disabledforeground option:
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* foreground color when disabled. NULL means
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* use normalFg with a 50% stipple instead. */
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GC normalTextGC; /* GC for drawing text in normal mode. Also
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* used to copy from off-screen pixmap onto
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* screen. */
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GC activeTextGC; /* GC for drawing text in active mode (NULL
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* means use normalTextGC). */
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GC disabledGC; /* Used to produce disabled effect for text
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* and check/radio marks. */
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GC stippleGC; /* Used to produce disabled stipple effect for
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* images when disabled. */
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Pixmap gray; /* Pixmap for displaying disabled text if
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* disabledFg is NULL. */
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GC copyGC; /* Used for copying information from an
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* off-screen pixmap to the screen. */
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Tcl_Obj *widthPtr; /* Value of -width option. */
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int width; /* Integer value corresponding to widthPtr. */
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Tcl_Obj *heightPtr; /* Value of -height option. */
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int height; /* Integer value corresponding to heightPtr. */
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Tcl_Obj *wrapLengthPtr; /* Value of -wraplength option: specifies line
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* length (in pixels) at which to wrap onto
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* next line. <= 0 means don't wrap except at
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* newlines. */
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int wrapLength; /* Integer value corresponding to
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* wrapLengthPtr. */
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Tcl_Obj *padXPtr; /* Value of -padx option: specifies how many
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* pixels of extra space to leave on left and
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* right of text. Ignored for bitmaps and
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* images. */
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int padX; /* Integer value corresponding to padXPtr. */
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Tcl_Obj *padYPtr; /* Value of -padx option: specifies how many
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* pixels of extra space to leave above and
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* below text. Ignored for bitmaps and
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* images. */
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int padY; /* Integer value corresponding to padYPtr. */
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Tk_Anchor anchor; /* Value of -anchor option: specifies where
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* text/bitmap should be displayed inside
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* button region. */
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Tk_Justify justify; /* Value of -justify option: specifies how to
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* align lines of multi-line text. */
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int indicatorOn; /* Value of -indicatoron option: 1 means draw
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* indicator in checkbuttons and radiobuttons,
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* 0 means don't draw it. */
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Tk_3DBorder selectBorder; /* Value of -selectcolor option: specifies
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* color for drawing indicator background, or
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* perhaps widget background, when
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* selected. */
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int textWidth; /* Width needed to display text as requested,
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* in pixels. */
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int textHeight; /* Height needed to display text as requested,
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* in pixels. */
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Tk_TextLayout textLayout; /* Saved text layout information. */
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int indicatorSpace; /* Horizontal space (in pixels) allocated for
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* display of indicator. */
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int indicatorDiameter; /* Diameter of indicator, in pixels. */
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enum defaultState defaultState;
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/* Value of -default option, such as
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* DEFAULT_NORMAL: specifies state of default
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* ring for buttons (normal, active, or
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* disabled). NULL for other classes. */
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/*
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* For check and radio buttons, the fields below are used to manage the
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* variable indicating the button's state.
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*/
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Tcl_Obj *selVarNamePtr; /* Value of -variable option: specifies name
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* of variable used to control selected state
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* of button. */
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Tcl_Obj *onValuePtr; /* Value of -offvalue option: specifies value
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* to store in variable when this button is
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* selected. */
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Tcl_Obj *offValuePtr; /* Value of -offvalue option: specifies value
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* to store in variable when this button isn't
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* selected. Used only by checkbuttons. */
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Tcl_Obj *tristateValuePtr; /* Value of -tristatevalue option: specifies
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* value to display Tristate or Multivalue
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* mode when variable matches this value.
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* Used by check- buttons. */
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/*
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* Miscellaneous information:
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*/
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Tk_Cursor cursor; /* Value of -cursor option: if not None,
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* specifies current cursor for window. */
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Tcl_Obj *takeFocusPtr; /* Value of -takefocus option; not used in the
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* C code, but used by keyboard traversal
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* scripts. */
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Tcl_Obj *commandPtr; /* Value of -command option: specifies script
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* to execute when button is invoked. If
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* widget is label or has no command, this is
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* NULL. */
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int compound; /* Value of -compound option; specifies
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* whether the button should show both an
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* image and text, and, if so, how. */
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int repeatDelay; /* Value of -repeatdelay option; specifies the
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* number of ms after which the button will
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* start to auto-repeat its command. */
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int repeatInterval; /* Value of -repeatinterval option; specifies
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* the number of ms between auto-repeat
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* invocataions of the button command. */
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int flags; /* Various flags; see below for
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* definitions. */
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} TkButton;
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/*
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* Possible "type" values for buttons. These are the kinds of widgets
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* supported by this file. The ordering of the type numbers is significant:
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* greater means more features and is used in the code.
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*/
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#define TYPE_LABEL 0
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#define TYPE_BUTTON 1
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#define TYPE_CHECK_BUTTON 2
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#define TYPE_RADIO_BUTTON 3
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/*
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* Flag bits for buttons:
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*
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* REDRAW_PENDING: Non-zero means a DoWhenIdle handler has
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* already been queued to redraw this window.
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* SELECTED: Non-zero means this button is selected, so
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* special highlight should be drawn.
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* GOT_FOCUS: Non-zero means this button currently has the
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* input focus.
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* BUTTON_DELETED: Non-zero needs that this button has been
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* deleted, or is in the process of being deleted
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*/
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#define REDRAW_PENDING (1 << 0)
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#define SELECTED (1 << 1)
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#define GOT_FOCUS (1 << 2)
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#define BUTTON_DELETED (1 << 3)
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#define TRISTATED (1 << 4)
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/*
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* Declaration of button class functions structure
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* and button/label defaults, for use in optionSpecs.
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*/
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MODULE_SCOPE const Tk_ClassProcs tkpButtonProcs;
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MODULE_SCOPE char tkDefButtonHighlightWidth[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefButtonPadx[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefButtonPady[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefButtonBorderWidth[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefLabelHighlightWidth[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefLabelPadx[TCL_INTEGER_SPACE];
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MODULE_SCOPE char tkDefLabelPady[TCL_INTEGER_SPACE];
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/*
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* Declaration of functions used in the implementation of the button widget.
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*/
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#ifndef TkpButtonSetDefaults
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MODULE_SCOPE void TkpButtonSetDefaults();
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#endif
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MODULE_SCOPE void TkButtonWorldChanged(ClientData instanceData);
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MODULE_SCOPE void TkpComputeButtonGeometry(TkButton *butPtr);
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MODULE_SCOPE TkButton *TkpCreateButton(Tk_Window tkwin);
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#ifndef TkpDestroyButton
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MODULE_SCOPE void TkpDestroyButton(TkButton *butPtr);
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#endif
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#ifndef TkpDisplayButton
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MODULE_SCOPE void TkpDisplayButton(ClientData clientData);
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#endif
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MODULE_SCOPE int TkInvokeButton(TkButton *butPtr);
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#endif /* _TKBUTTON */
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