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- /*
- * tkButton.c --
- *
- * This module implements a collection of button-like
- * widgets for the Tk toolkit. The widgets implemented
- * include labels, buttons, check buttons, and radio
- * buttons.
- *
- * Copyright (c) 1990-1993 The Regents of the University of California.
- * All rights reserved.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
- * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
- * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkButton.c,v 1.77 93/06/16 17:15:20 ouster Exp $ SPRITE (Berkeley)";
- #endif
-
- #include "default.h"
- #include "tkConfig.h"
- #include "tkInt.h"
-
- /*
- * 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. */
- 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 textLength; /* # of characters in text. */
- 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. */
-
- /*
- * 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. */
- XFontStruct *fontPtr; /* 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. */
- int leftBearing; /* Distance from origin of text to its leftmost
- * drawn pixel, in pixels (positive measures
- * to the right). */
- int rightBearing; /* Amount text sticks right from its origin. */
- 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 padX, padY; /* Extra space around text or bitmap (pixels
- * on each side). */
- Tk_Anchor anchor; /* Where text/bitmap should be displayed
- * inside button region. */
- XColor *selectorFg; /* Color for selector. */
- GC selectorGC; /* For drawing highlight when this button
- * is in selected state. */
- int selectorSpace; /* Horizontal space (in pixels) allocated for
- * display of selector. */
- int selectorDiameter; /* Diameter of selector, in pixels. */
-
- /*
- * 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:
- */
-
- Cursor cursor; /* Current cursor for window, or None. */
- 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. */
- } Button;
-
- /*
- * 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
-
- /*
- * Class names for buttons, indexed by one of the type values above.
- */
-
- static char *classNames[] = {"Label", "Button", "Checkbutton", "Radiobutton"};
-
- /*
- * 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.
- */
-
- #define REDRAW_PENDING 1
- #define SELECTED 2
-
- /*
- * 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)
-
- static int configFlags[] = {LABEL_MASK, BUTTON_MASK,
- CHECK_BUTTON_MASK, RADIO_BUTTON_MASK};
- /*
- * Information used for parsing configuration specs:
- */
-
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
- DEF_BUTTON_ACTIVE_BG_COLOR, Tk_Offset(Button, activeBorder),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
- |TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
- DEF_BUTTON_ACTIVE_BG_MONO, Tk_Offset(Button, activeBorder),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
- |TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
- DEF_BUTTON_ACTIVE_FG_COLOR, Tk_Offset(Button, activeFg),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
- |TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
- DEF_BUTTON_ACTIVE_FG_MONO, Tk_Offset(Button, activeFg),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
- |TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
- DEF_BUTTON_ANCHOR, Tk_Offset(Button, anchor), ALL_MASK},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_BUTTON_BG_COLOR, Tk_Offset(Button, normalBorder),
- ALL_MASK | TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_BUTTON_BG_MONO, Tk_Offset(Button, normalBorder),
- ALL_MASK | TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
- (char *) NULL, 0, ALL_MASK},
- {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
- (char *) NULL, 0, ALL_MASK},
- {TK_CONFIG_BITMAP, "-bitmap", "bitmap", "Bitmap",
- DEF_BUTTON_BITMAP, Tk_Offset(Button, bitmap),
- ALL_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
- DEF_BUTTON_BORDER_WIDTH, Tk_Offset(Button, borderWidth), ALL_MASK},
- {TK_CONFIG_STRING, "-command", "command", "Command",
- DEF_BUTTON_COMMAND, Tk_Offset(Button, command),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
- DEF_BUTTON_CURSOR, Tk_Offset(Button, cursor),
- ALL_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
- "DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
- Tk_Offset(Button, disabledFg), BUTTON_MASK|CHECK_BUTTON_MASK
- |RADIO_BUTTON_MASK|TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
- "DisabledForeground", DEF_BUTTON_DISABLED_FG_MONO,
- Tk_Offset(Button, disabledFg), BUTTON_MASK|CHECK_BUTTON_MASK
- |RADIO_BUTTON_MASK|TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
- {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
- (char *) NULL, 0, ALL_MASK},
- {TK_CONFIG_FONT, "-font", "font", "Font",
- DEF_BUTTON_FONT, Tk_Offset(Button, fontPtr),
- ALL_MASK},
- {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
- DEF_BUTTON_FG, Tk_Offset(Button, normalFg), ALL_MASK},
- {TK_CONFIG_INT, "-height", "height", "Height",
- DEF_BUTTON_HEIGHT, Tk_Offset(Button, height), ALL_MASK},
- {TK_CONFIG_STRING, "-offvalue", "offValue", "Value",
- DEF_BUTTON_OFF_VALUE, Tk_Offset(Button, offValue),
- CHECK_BUTTON_MASK},
- {TK_CONFIG_STRING, "-onvalue", "onValue", "Value",
- DEF_BUTTON_ON_VALUE, Tk_Offset(Button, onValue),
- CHECK_BUTTON_MASK},
- {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
- DEF_BUTTON_PADX, Tk_Offset(Button, padX), ALL_MASK},
- {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
- DEF_BUTTON_PADY, Tk_Offset(Button, padY), ALL_MASK},
- {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
- DEF_BUTTON_RELIEF, Tk_Offset(Button, relief),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
- {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
- DEF_LABEL_RELIEF, Tk_Offset(Button, relief), LABEL_MASK},
- {TK_CONFIG_COLOR, "-selector", "selector", "Foreground",
- DEF_BUTTON_SELECTOR_COLOR, Tk_Offset(Button, selectorFg),
- CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_COLOR_ONLY
- |TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-selector", "selector", "Foreground",
- DEF_BUTTON_SELECTOR_MONO, Tk_Offset(Button, selectorFg),
- CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_MONO_ONLY
- |TK_CONFIG_NULL_OK},
- {TK_CONFIG_UID, "-state", "state", "State",
- DEF_BUTTON_STATE, Tk_Offset(Button, state),
- BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
- {TK_CONFIG_STRING, "-text", "text", "Text",
- DEF_BUTTON_TEXT, Tk_Offset(Button, text), ALL_MASK},
- {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
- DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(Button, textVarName),
- ALL_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-value", "value", "Value",
- DEF_BUTTON_VALUE, Tk_Offset(Button, onValue),
- RADIO_BUTTON_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_STRING, "-variable", "variable", "Variable",
- DEF_RADIOBUTTON_VARIABLE, Tk_Offset(Button, selVarName),
- RADIO_BUTTON_MASK},
- {TK_CONFIG_STRING, "-variable", "variable", "Variable",
- DEF_CHECKBUTTON_VARIABLE, Tk_Offset(Button, selVarName),
- CHECK_BUTTON_MASK|TK_CONFIG_NULL_OK},
- {TK_CONFIG_INT, "-width", "width", "Width",
- DEF_BUTTON_WIDTH, Tk_Offset(Button, width), ALL_MASK},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
-
- /*
- * String to print out in error messages, identifying options for
- * widget commands for different types of labels or buttons:
- */
-
- static char *optionStrings[] = {
- "configure",
- "activate, configure, deactivate, flash, or invoke",
- "activate, configure, deactivate, deselect, flash, invoke, select, or toggle",
- "activate, configure, deactivate, deselect, flash, invoke, or select"
- };
-
- /*
- * Forward declarations for procedures defined later in this file:
- */
-
- static void ButtonEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static char * ButtonTextVarProc _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, char *name1, char *name2,
- int flags));
- static char * ButtonVarProc _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, char *name1, char *name2,
- int flags));
- static int ButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- static void ComputeButtonGeometry _ANSI_ARGS_((Button *butPtr));
- static int ConfigureButton _ANSI_ARGS_((Tcl_Interp *interp,
- Button *butPtr, int argc, char **argv,
- int flags));
- static void DestroyButton _ANSI_ARGS_((ClientData clientData));
- static void DisplayButton _ANSI_ARGS_((ClientData clientData));
- static int InvokeButton _ANSI_ARGS_((Button *butPtr));
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_ButtonCmd --
- *
- * This procedure is invoked to process the "button", "label",
- * "radiobutton", and "checkbutton" Tcl commands. See the
- * user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_ButtonCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Main window associated with
- * interpreter. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- register Button *butPtr;
- int type;
- Tk_Window tkwin = (Tk_Window) clientData;
- Tk_Window new;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " pathName ?options?\"", (char *) NULL);
- return TCL_ERROR;
- }
-
- switch (argv[0][0]) {
- case 'l':
- type = TYPE_LABEL;
- break;
- case 'b':
- type = TYPE_BUTTON;
- break;
- case 'c':
- type = TYPE_CHECK_BUTTON;
- break;
- case 'r':
- type = TYPE_RADIO_BUTTON;
- break;
- default:
- sprintf(interp->result,
- "unknown button-creation command \"%.50s\"", argv[0]);
- return TCL_ERROR;
- }
-
- /*
- * Create the new window.
- */
-
- new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
- if (new == NULL) {
- return TCL_ERROR;
- }
-
- /*
- * Initialize the data structure for the button.
- */
-
- butPtr = (Button *) ckalloc(sizeof(Button));
- butPtr->tkwin = new;
- butPtr->display = Tk_Display(new);
- butPtr->interp = interp;
- butPtr->type = type;
- butPtr->text = NULL;
- butPtr->textVarName = NULL;
- butPtr->bitmap = None;
- butPtr->state = tkNormalUid;
- butPtr->normalBorder = NULL;
- butPtr->activeBorder = NULL;
- butPtr->borderWidth = 0;
- butPtr->relief = TK_RELIEF_FLAT;
- butPtr->fontPtr = NULL;
- butPtr->normalFg = NULL;
- butPtr->activeFg = NULL;
- butPtr->disabledFg = NULL;
- butPtr->normalTextGC = None;
- butPtr->activeTextGC = None;
- butPtr->gray = None;
- butPtr->disabledGC = None;
- butPtr->selectorFg = NULL;
- butPtr->selectorGC = None;
- butPtr->selVarName = NULL;
- butPtr->onValue = NULL;
- butPtr->offValue = NULL;
- butPtr->cursor = None;
- butPtr->command = NULL;
- butPtr->flags = 0;
-
- Tk_SetClass(new, classNames[type]);
- Tk_CreateEventHandler(butPtr->tkwin, ExposureMask|StructureNotifyMask,
- ButtonEventProc, (ClientData) butPtr);
- Tcl_CreateCommand(interp, Tk_PathName(butPtr->tkwin), ButtonWidgetCmd,
- (ClientData) butPtr, (void (*)()) NULL);
- if (ConfigureButton(interp, butPtr, argc-2, argv+2,
- configFlags[type]) != TCL_OK) {
- Tk_DestroyWindow(butPtr->tkwin);
- return TCL_ERROR;
- }
-
- interp->result = Tk_PathName(butPtr->tkwin);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ButtonWidgetCmd --
- *
- * This procedure is invoked to process the Tcl command
- * that corresponds to a widget managed by this module.
- * See the user documentation for details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- static int
- ButtonWidgetCmd(clientData, interp, argc, argv)
- ClientData clientData; /* Information about button widget. */
- Tcl_Interp *interp; /* Current interpreter. */
- int argc; /* Number of arguments. */
- char **argv; /* Argument strings. */
- {
- register Button *butPtr = (Button *) clientData;
- int result = TCL_OK;
- int length;
- char c;
-
- if (argc < 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s option [arg arg ...]\"",
- argv[0]);
- return TCL_ERROR;
- }
- Tk_Preserve((ClientData) butPtr);
- c = argv[1][0];
- length = strlen(argv[1]);
- if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)
- && (butPtr->type != TYPE_LABEL)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s activate\"",
- argv[0]);
- goto error;
- }
- if (butPtr->state != tkDisabledUid) {
- butPtr->state = tkActiveUid;
- Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->activeBorder);
- goto redisplay;
- }
- } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
- if (argc == 2) {
- result = Tk_ConfigureInfo(interp, butPtr->tkwin, configSpecs,
- (char *) butPtr, (char *) NULL, configFlags[butPtr->type]);
- } else if (argc == 3) {
- result = Tk_ConfigureInfo(interp, butPtr->tkwin, configSpecs,
- (char *) butPtr, argv[2],
- configFlags[butPtr->type]);
- } else {
- result = ConfigureButton(interp, butPtr, argc-2, argv+2,
- configFlags[butPtr->type] | TK_CONFIG_ARGV_ONLY);
- }
- } else if ((c == 'd') && (strncmp(argv[1], "deactivate", length) == 0)
- && (length > 2) && (butPtr->type != TYPE_LABEL)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s deactivate\"",
- argv[0]);
- goto error;
- }
- if (butPtr->state != tkDisabledUid) {
- butPtr->state = tkNormalUid;
- Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->normalBorder);
- goto redisplay;
- }
- } else if ((c == 'd') && (strncmp(argv[1], "deselect", length) == 0)
- && (length > 2) && (butPtr->type >= TYPE_CHECK_BUTTON)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s deselect\"",
- argv[0]);
- goto error;
- }
- if (butPtr->type == TYPE_CHECK_BUTTON) {
- Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue,
- TCL_GLOBAL_ONLY);
- } else if (butPtr->flags & SELECTED) {
- Tcl_SetVar(interp, butPtr->selVarName, "", TCL_GLOBAL_ONLY);
- }
- } else if ((c == 'f') && (strncmp(argv[1], "flash", length) == 0)
- && (butPtr->type != TYPE_LABEL)) {
- int i;
-
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s flash\"",
- argv[0]);
- goto error;
- }
- if (butPtr->state != tkDisabledUid) {
- for (i = 0; i < 4; i++) {
- butPtr->state = (butPtr->state == tkNormalUid)
- ? tkActiveUid : tkNormalUid;
- Tk_SetBackgroundFromBorder(butPtr->tkwin,
- (butPtr->state == tkActiveUid) ? butPtr->activeBorder
- : butPtr->normalBorder);
- DisplayButton((ClientData) butPtr);
- XFlush(butPtr->display);
- Tk_Sleep(50);
- }
- }
- } else if ((c == 'i') && (strncmp(argv[1], "invoke", length) == 0)
- && (butPtr->type > TYPE_LABEL)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s invoke\"",
- argv[0]);
- goto error;
- }
- if (butPtr->state != tkDisabledUid) {
- result = InvokeButton(butPtr);
- }
- } else if ((c == 's') && (strncmp(argv[1], "select", length) == 0)
- && (butPtr->type >= TYPE_CHECK_BUTTON)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s select\"",
- argv[0]);
- goto error;
- }
- Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue, TCL_GLOBAL_ONLY);
- } else if ((c == 't') && (strncmp(argv[1], "toggle", length) == 0)
- && (length >= 2) && (butPtr->type == TYPE_CHECK_BUTTON)) {
- if (argc > 2) {
- sprintf(interp->result,
- "wrong # args: should be \"%.50s select\"",
- argv[0]);
- goto error;
- }
- if (butPtr->flags & SELECTED) {
- Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue, TCL_GLOBAL_ONLY);
- } else {
- Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue, TCL_GLOBAL_ONLY);
- }
- } else {
- sprintf(interp->result,
- "bad option \"%.50s\": must be %s", argv[1],
- optionStrings[butPtr->type]);
- goto error;
- }
- Tk_Release((ClientData) butPtr);
- return result;
-
- redisplay:
- if (Tk_IsMapped(butPtr->tkwin) && !(butPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
- butPtr->flags |= REDRAW_PENDING;
- }
- Tk_Release((ClientData) butPtr);
- return TCL_OK;
-
- error:
- Tk_Release((ClientData) butPtr);
- return TCL_ERROR;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DestroyButton --
- *
- * This procedure is invoked by Tk_EventuallyFree or Tk_Release
- * to clean up the internal structure of a button at a safe time
- * (when no-one is using it anymore).
- *
- * Results:
- * None.
- *
- * Side effects:
- * Everything associated with the widget is freed up.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DestroyButton(clientData)
- ClientData clientData; /* Info about entry widget. */
- {
- register Button *butPtr = (Button *) clientData;
-
- /*
- * Free up all the stuff that requires special handling, then
- * let Tk_FreeOptions handle all the standard option-related
- * stuff.
- */
-
- if (butPtr->textVarName != NULL) {
- Tcl_UntraceVar(butPtr->interp, butPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonTextVarProc, (ClientData) butPtr);
- }
- if (butPtr->normalTextGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->normalTextGC);
- }
- if (butPtr->activeTextGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->activeTextGC);
- }
- if (butPtr->gray != None) {
- Tk_FreeBitmap(butPtr->display, butPtr->gray);
- }
- if (butPtr->disabledGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->disabledGC);
- }
- if (butPtr->selectorGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->selectorGC);
- }
- if (butPtr->selVarName != NULL) {
- Tcl_UntraceVar(butPtr->interp, butPtr->selVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonVarProc, (ClientData) butPtr);
- }
- Tk_FreeOptions(configSpecs, (char *) butPtr, butPtr->display,
- configFlags[butPtr->type]);
- ckfree((char *) butPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ConfigureButton --
- *
- * This procedure is called to process an argv/argc list, plus
- * the Tk option database, in order to configure (or
- * reconfigure) a button widget.
- *
- * Results:
- * The return value is a standard Tcl result. If TCL_ERROR is
- * returned, then interp->result contains an error message.
- *
- * Side effects:
- * Configuration information, such as text string, colors, font,
- * etc. get set for butPtr; old resources get freed, if there
- * were any. The button is redisplayed.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ConfigureButton(interp, butPtr, argc, argv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- register Button *butPtr; /* Information about widget; may or may
- * not already have values for some fields. */
- int argc; /* Number of valid entries in argv. */
- char **argv; /* Arguments. */
- int flags; /* Flags to pass to Tk_ConfigureWidget. */
- {
- XGCValues gcValues;
- GC newGC;
- unsigned long mask;
-
- /*
- * Eliminate any existing trace on variables monitored by the button.
- */
-
- if (butPtr->textVarName != NULL) {
- Tcl_UntraceVar(interp, butPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonTextVarProc, (ClientData) butPtr);
- }
- if (butPtr->selVarName != NULL) {
- Tcl_UntraceVar(interp, butPtr->selVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonVarProc, (ClientData) butPtr);
- }
-
- if (Tk_ConfigureWidget(interp, butPtr->tkwin, configSpecs,
- argc, argv, (char *) butPtr, flags) != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * A few options need special processing, such as setting the
- * background from a 3-D border, or filling in complicated
- * defaults that couldn't be specified to Tk_ConfigureWidget.
- */
-
- if (butPtr->state == tkActiveUid) {
- Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->activeBorder);
- } else {
- Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->normalBorder);
- if ((butPtr->state != tkNormalUid)
- && (butPtr->state != tkDisabledUid)) {
- Tcl_AppendResult(interp, "bad state value \"", butPtr->state,
- "\": must be normal, active, or disabled", (char *) NULL);
- butPtr->state = tkNormalUid;
- return TCL_ERROR;
- }
- }
-
- gcValues.font = butPtr->fontPtr->fid;
- gcValues.foreground = butPtr->normalFg->pixel;
- gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;
-
- /*
- * Note: GraphicsExpose events are disabled in normalTextGC because it's
- * used to copy stuff from an off-screen pixmap onto the screen (we know
- * that there's no problem with obscured areas).
- */
-
- gcValues.graphics_exposures = False;
- newGC = Tk_GetGC(butPtr->tkwin,
- GCForeground|GCBackground|GCFont|GCGraphicsExposures, &gcValues);
- if (butPtr->normalTextGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->normalTextGC);
- }
- butPtr->normalTextGC = newGC;
-
- if (butPtr->activeFg != NULL) {
- gcValues.font = butPtr->fontPtr->fid;
- gcValues.foreground = butPtr->activeFg->pixel;
- gcValues.background = Tk_3DBorderColor(butPtr->activeBorder)->pixel;
- newGC = Tk_GetGC(butPtr->tkwin, GCForeground|GCBackground|GCFont,
- &gcValues);
- if (butPtr->activeTextGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->activeTextGC);
- }
- butPtr->activeTextGC = newGC;
- }
-
- gcValues.font = butPtr->fontPtr->fid;
- gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;
- if (butPtr->disabledFg != NULL) {
- gcValues.foreground = butPtr->disabledFg->pixel;
- mask = GCForeground|GCBackground|GCFont;
- } else {
- gcValues.foreground = gcValues.background;
- if (butPtr->gray == None) {
- butPtr->gray = Tk_GetBitmap(interp, butPtr->tkwin,
- Tk_GetUid("gray50"));
- if (butPtr->gray == None) {
- return TCL_ERROR;
- }
- }
- gcValues.fill_style = FillStippled;
- gcValues.stipple = butPtr->gray;
- mask = GCForeground|GCFillStyle|GCStipple;
- }
- newGC = Tk_GetGC(butPtr->tkwin, mask, &gcValues);
- if (butPtr->disabledGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->disabledGC);
- }
- butPtr->disabledGC = newGC;
-
- if (butPtr->padX < 0) {
- butPtr->padX = 0;
- }
- if (butPtr->padY < 0) {
- butPtr->padY = 0;
- }
-
- if (butPtr->type >= TYPE_CHECK_BUTTON) {
- char *value;
-
- if (butPtr->selectorFg != NULL) {
- gcValues.foreground = butPtr->selectorFg->pixel;
- newGC = Tk_GetGC(butPtr->tkwin, GCForeground, &gcValues);
- } else {
- newGC = None;
- }
- if (butPtr->selectorGC != None) {
- Tk_FreeGC(butPtr->display, butPtr->selectorGC);
- }
- butPtr->selectorGC = newGC;
-
- if (butPtr->selVarName == NULL) {
- butPtr->selVarName = (char *) ckalloc((unsigned)
- (strlen(Tk_Name(butPtr->tkwin)) + 1));
- strcpy(butPtr->selVarName, Tk_Name(butPtr->tkwin));
- }
- if (butPtr->onValue == NULL) {
- butPtr->onValue = (char *) ckalloc((unsigned)
- (strlen(Tk_Name(butPtr->tkwin)) + 1));
- strcpy(butPtr->onValue, Tk_Name(butPtr->tkwin));
- }
-
- /*
- * Select the button if the associated variable has the
- * appropriate value, initialize the variable if it doesn't
- * exist, then set a trace on the variable to monitor future
- * changes to its value.
- */
-
- value = Tcl_GetVar(interp, butPtr->selVarName, TCL_GLOBAL_ONLY);
- butPtr->flags &= ~SELECTED;
- if (value != NULL) {
- if (strcmp(value, butPtr->onValue) == 0) {
- butPtr->flags |= SELECTED;
- }
- } else {
- Tcl_SetVar(interp, butPtr->selVarName,
- (butPtr->type == TYPE_CHECK_BUTTON) ? butPtr->offValue : "",
- TCL_GLOBAL_ONLY);
- }
- Tcl_TraceVar(interp, butPtr->selVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonVarProc, (ClientData) butPtr);
- }
-
- /*
- * If the button is to display the value of a variable, then set up
- * a trace on the variable's value, create the variable if it doesn't
- * exist, and fetch its current value.
- */
-
- if ((butPtr->bitmap == None) && (butPtr->textVarName != NULL)) {
- char *value;
-
- value = Tcl_GetVar(interp, butPtr->textVarName, TCL_GLOBAL_ONLY);
- if (value == NULL) {
- Tcl_SetVar(interp, butPtr->textVarName, butPtr->text,
- TCL_GLOBAL_ONLY);
- } else {
- if (butPtr->text != NULL) {
- ckfree(butPtr->text);
- }
- butPtr->text = ckalloc((unsigned) (strlen(value) + 1));
- strcpy(butPtr->text, value);
- }
- Tcl_TraceVar(interp, butPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonTextVarProc, (ClientData) butPtr);
- }
-
- ComputeButtonGeometry(butPtr);
-
- /*
- * Lastly, arrange for the button to be redisplayed.
- */
-
- if (Tk_IsMapped(butPtr->tkwin) && !(butPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
- butPtr->flags |= REDRAW_PENDING;
- }
-
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DisplayButton --
- *
- * This procedure is invoked to display a button widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Commands are output to X to display the button in its
- * current mode.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DisplayButton(clientData)
- ClientData clientData; /* Information about widget. */
- {
- register Button *butPtr = (Button *) clientData;
- GC gc;
- Tk_3DBorder border;
- Pixmap pixmap;
- int x = 0; /* Initialization only needed to stop
- * compiler warning. */
- int y;
- register Tk_Window tkwin = butPtr->tkwin;
-
- butPtr->flags &= ~REDRAW_PENDING;
- if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
- return;
- }
-
- if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
- gc = butPtr->disabledGC;
- border = butPtr->normalBorder;
- } else if (butPtr->state == tkActiveUid) {
- gc = butPtr->activeTextGC;
- border = butPtr->activeBorder;
- } else {
- gc = butPtr->normalTextGC;
- border = butPtr->normalBorder;
- }
-
- /*
- * In order to avoid screen flashes, this procedure redraws
- * the button in a pixmap, then copies the pixmap to the
- * screen in a single operation. This means that there's no
- * point in time where the on-sreen image has been cleared.
- */
-
- pixmap = XCreatePixmap(butPtr->display, Tk_WindowId(tkwin),
- Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
- Tk_Fill3DRectangle(butPtr->display, pixmap, border,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
-
- /*
- * Display bitmap or text for button.
- */
-
- if (butPtr->bitmap != None) {
- unsigned int width, height;
-
- Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
- switch (butPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
- x = butPtr->borderWidth + butPtr->selectorSpace
- + butPtr->padX + 1;
- break;
- case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
- x = (Tk_Width(tkwin) + butPtr->selectorSpace - width)/2;
- break;
- default:
- x = Tk_Width(tkwin) - butPtr->borderWidth - butPtr->padX
- - width - 1;
- break;
- }
- switch (butPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
- y = butPtr->borderWidth + butPtr->padY + 1;
- break;
- case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
- y = (Tk_Height(tkwin) - height)/2;
- break;
- default:
- y = Tk_Height(tkwin) - butPtr->borderWidth - butPtr->padY
- - height - 1;
- break;
- }
- if (butPtr->relief == TK_RELIEF_RAISED) {
- x -= 1;
- y -= 1;
- } else if (butPtr->relief == TK_RELIEF_SUNKEN) {
- x += 1;
- y += 1;
- }
- XCopyPlane(butPtr->display, butPtr->bitmap, pixmap,
- gc, 0, 0, width, height, x, y, 1);
- y += height/2;
- } else {
- switch (butPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
- x = butPtr->borderWidth + butPtr->padX + butPtr->selectorSpace
- - butPtr->leftBearing + 1;
- break;
- case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
- x = (Tk_Width(tkwin) + butPtr->selectorSpace
- - butPtr->leftBearing - butPtr->rightBearing)/2;
- break;
- default:
- x = Tk_Width(tkwin) - butPtr->borderWidth - butPtr->padX
- - butPtr->rightBearing - 1;
- break;
- }
- switch (butPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
- y = butPtr->borderWidth + butPtr->fontPtr->ascent
- + butPtr->padY + 1;
- break;
- case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
- y = (Tk_Height(tkwin) + butPtr->fontPtr->ascent
- - butPtr->fontPtr->descent)/2;
- break;
- default:
- y = Tk_Height(tkwin) - butPtr->borderWidth - butPtr->padY
- - butPtr->fontPtr->descent - 1;
- break;
- }
- if (butPtr->relief == TK_RELIEF_RAISED) {
- x -= 1;
- y -= 1;
- } else if (butPtr->relief == TK_RELIEF_SUNKEN) {
- x += 1;
- y += 1;
- }
- XDrawString(butPtr->display, pixmap, gc, x, y,
- butPtr->text, butPtr->textLength);
- y -= (butPtr->fontPtr->ascent - butPtr->fontPtr->descent)/2;
- x += butPtr->leftBearing;
- }
-
- /*
- * Draw the selector for check buttons and radio buttons. At this
- * point x and y refer to the top-left corner of the text or bitmap.
- */
-
- if ((butPtr->type == TYPE_CHECK_BUTTON) && (butPtr->selectorGC != None)) {
- int dim;
-
- dim = butPtr->selectorDiameter;
- x -= butPtr->selectorSpace;
- y -= dim/2;
- Tk_Draw3DRectangle(butPtr->display, pixmap, border, x, y,
- dim, dim, butPtr->borderWidth, TK_RELIEF_SUNKEN);
- x += butPtr->borderWidth;
- y += butPtr->borderWidth;
- dim -= 2*butPtr->borderWidth;
- if (dim > 0) {
- if (butPtr->flags & SELECTED) {
- XFillRectangle(butPtr->display, pixmap, butPtr->selectorGC,
- x, y, (unsigned int) dim, (unsigned int) dim);
- } else {
- Tk_Fill3DRectangle(butPtr->display, pixmap,
- butPtr->normalBorder, x, y, dim, dim,
- butPtr->borderWidth, TK_RELIEF_FLAT);
- }
- }
- } else if ((butPtr->type == TYPE_RADIO_BUTTON)
- && (butPtr->selectorGC != None)) {
- XPoint points[4];
- int radius;
-
- radius = butPtr->selectorDiameter/2;
- points[0].x = x - butPtr->selectorSpace;
- points[0].y = y;
- points[1].x = points[0].x + radius;
- points[1].y = points[0].y + radius;
- points[2].x = points[1].x + radius;
- points[2].y = points[0].y;
- points[3].x = points[1].x;
- points[3].y = points[0].y - radius;
- if (butPtr->flags & SELECTED) {
- XFillPolygon(butPtr->display, pixmap, butPtr->selectorGC,
- points, 4, Convex, CoordModeOrigin);
- } else {
- Tk_Fill3DPolygon(butPtr->display, pixmap, butPtr->normalBorder,
- points, 4, butPtr->borderWidth, TK_RELIEF_FLAT);
- }
- Tk_Draw3DPolygon(butPtr->display, pixmap, border,
- points, 4, butPtr->borderWidth, TK_RELIEF_RAISED);
- }
-
- /*
- * If the button is disabled with a stipple rather than a special
- * foreground color, generate the stippled effect.
- */
-
- if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg == NULL)) {
- XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC,
- butPtr->borderWidth, butPtr->borderWidth,
- (unsigned) (Tk_Width(tkwin) - 2*butPtr->borderWidth),
- (unsigned) (Tk_Height(tkwin) - 2*butPtr->borderWidth));
- }
-
- /*
- * Draw the border last. This way, if the button's contents
- * overflow onto the border they'll be covered up by the border.
- */
-
- if (butPtr->relief != TK_RELIEF_FLAT) {
- Tk_Draw3DRectangle(butPtr->display, pixmap, border,0, 0,
- Tk_Width(tkwin), Tk_Height(tkwin), butPtr->borderWidth,
- butPtr->relief);
- }
-
- /*
- * Copy the information from the off-screen pixmap onto the screen,
- * then delete the pixmap.
- */
-
- XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin),
- butPtr->normalTextGC, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, 0);
- XFreePixmap(butPtr->display, pixmap);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ButtonEventProc --
- *
- * This procedure is invoked by the Tk dispatcher for various
- * events on buttons.
- *
- * Results:
- * None.
- *
- * Side effects:
- * When the window gets deleted, internal structures get
- * cleaned up. When it gets exposed, it is redisplayed.
- *
- *--------------------------------------------------------------
- */
-
- static void
- ButtonEventProc(clientData, eventPtr)
- ClientData clientData; /* Information about window. */
- XEvent *eventPtr; /* Information about event. */
- {
- Button *butPtr = (Button *) clientData;
- if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
- if ((butPtr->tkwin != NULL) && !(butPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
- butPtr->flags |= REDRAW_PENDING;
- }
- } else if (eventPtr->type == DestroyNotify) {
- Tcl_DeleteCommand(butPtr->interp, Tk_PathName(butPtr->tkwin));
- butPtr->tkwin = NULL;
- if (butPtr->flags & REDRAW_PENDING) {
- Tk_CancelIdleCall(DisplayButton, (ClientData) butPtr);
- }
- Tk_EventuallyFree((ClientData) butPtr, DestroyButton);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ComputeButtonGeometry --
- *
- * After changes in a button's text or bitmap, this procedure
- * recomputes the button's geometry and passes this information
- * along to the geometry manager for the window.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The button's window may change size.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- ComputeButtonGeometry(butPtr)
- register Button *butPtr; /* Button whose geometry may have changed. */
- {
- XCharStruct bbox;
- int dummy;
- unsigned int width, height;
-
- butPtr->selectorSpace = 0;
- if (butPtr->bitmap != None) {
- Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
- if (butPtr->width > 0) {
- width = butPtr->width;
- }
- if (butPtr->height > 0) {
- height = butPtr->height;
- }
- if ((butPtr->type >= TYPE_CHECK_BUTTON)
- && (butPtr->selectorGC != None)) {
- butPtr->selectorSpace = height;
- if (butPtr->type == TYPE_CHECK_BUTTON) {
- butPtr->selectorDiameter = (65*height)/100;
- } else {
- butPtr->selectorDiameter = (75*height)/100;
- }
- }
- } else {
- butPtr->textLength = strlen(butPtr->text);
- XTextExtents(butPtr->fontPtr, butPtr->text, butPtr->textLength,
- &dummy, &dummy, &dummy, &bbox);
- butPtr->leftBearing = bbox.lbearing;
- butPtr->rightBearing = bbox.rbearing;
- width = bbox.rbearing - bbox.lbearing;
- height = butPtr->fontPtr->ascent + butPtr->fontPtr->descent;
- if (butPtr->width > 0) {
- width = butPtr->width * XTextWidth(butPtr->fontPtr, "0", 1);
- }
- if (butPtr->height > 0) {
- height *= butPtr->height;
- }
- if ((butPtr->type >= TYPE_CHECK_BUTTON)
- && (butPtr->selectorGC != None)) {
- butPtr->selectorDiameter = butPtr->fontPtr->ascent
- + butPtr->fontPtr->descent;
- if (butPtr->type == TYPE_CHECK_BUTTON) {
- butPtr->selectorDiameter = (80*butPtr->selectorDiameter)/100;
- }
- butPtr->selectorSpace = butPtr->selectorDiameter
- + XTextWidth(butPtr->fontPtr, "0", 1);
- }
- }
-
- /*
- * When issuing the geometry request, add extra space for the selector,
- * if any, and for the border and padding, plus two extra pixels so the
- * display can be offset by 1 pixel in either direction for the raised
- * or lowered effect.
- */
-
- width += 2*butPtr->padX;
- height += 2*butPtr->padY;
- Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->selectorSpace
- + 2*butPtr->borderWidth + 2),
- (int) (height + 2*butPtr->borderWidth + 2));
- Tk_SetInternalBorder(butPtr->tkwin, butPtr->borderWidth);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * InvokeButton --
- *
- * This procedure is called to carry out the actions associated
- * with a button, such as invoking a Tcl command or setting a
- * variable. This procedure is invoked, for example, when the
- * button is invoked via the mouse.
- *
- * Results:
- * A standard Tcl return value. Information is also left in
- * interp->result.
- *
- * Side effects:
- * Depends on the button and its associated command.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- InvokeButton(butPtr)
- register Button *butPtr; /* Information about button. */
- {
- if (butPtr->type == TYPE_CHECK_BUTTON) {
- if (butPtr->flags & SELECTED) {
- Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->offValue,
- TCL_GLOBAL_ONLY);
- } else {
- Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->onValue,
- TCL_GLOBAL_ONLY);
- }
- } else if (butPtr->type == TYPE_RADIO_BUTTON) {
- Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->onValue,
- TCL_GLOBAL_ONLY);
- }
- if ((butPtr->type != TYPE_LABEL) && (butPtr->command != NULL)) {
- return TkCopyAndGlobalEval(butPtr->interp, butPtr->command);
- }
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ButtonVarProc --
- *
- * This procedure is invoked when someone changes the
- * state variable associated with a radio button. Depending
- * on the new value of the button's variable, the button
- * may be selected or deselected.
- *
- * Results:
- * NULL is always returned.
- *
- * Side effects:
- * The button may become selected or deselected.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static char *
- ButtonVarProc(clientData, interp, name1, name2, flags)
- ClientData clientData; /* Information about button. */
- Tcl_Interp *interp; /* Interpreter containing variable. */
- char *name1; /* Name of variable. */
- char *name2; /* Second part of variable name. */
- int flags; /* Information about what happened. */
- {
- register Button *butPtr = (Button *) clientData;
- char *value;
-
- /*
- * If the variable is being unset, then just re-establish the
- * trace unless the whole interpreter is going away.
- */
-
- if (flags & TCL_TRACE_UNSETS) {
- butPtr->flags &= ~SELECTED;
- if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
- Tcl_TraceVar2(interp, name1, name2,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonVarProc, clientData);
- }
- goto redisplay;
- }
-
- /*
- * Use the value of the variable to update the selected status of
- * the button.
- */
-
- value = Tcl_GetVar2(interp, name1, name2, flags & TCL_GLOBAL_ONLY);
- if (strcmp(value, butPtr->onValue) == 0) {
- if (butPtr->flags & SELECTED) {
- return (char *) NULL;
- }
- butPtr->flags |= SELECTED;
- } else if (butPtr->flags & SELECTED) {
- butPtr->flags &= ~SELECTED;
- } else {
- return (char *) NULL;
- }
-
- redisplay:
- if ((butPtr->tkwin != NULL) && Tk_IsMapped(butPtr->tkwin)
- && !(butPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
- butPtr->flags |= REDRAW_PENDING;
- }
- return (char *) NULL;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * ButtonTextVarProc --
- *
- * This procedure is invoked when someone changes the variable
- * whose contents are to be displayed in a button.
- *
- * Results:
- * NULL is always returned.
- *
- * Side effects:
- * The text displayed in the button will change to match the
- * variable.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static char *
- ButtonTextVarProc(clientData, interp, name1, name2, flags)
- ClientData clientData; /* Information about button. */
- Tcl_Interp *interp; /* Interpreter containing variable. */
- char *name1; /* Name of variable. */
- char *name2; /* Second part of variable name. */
- int flags; /* Information about what happened. */
- {
- register Button *butPtr = (Button *) clientData;
- char *value;
-
- /*
- * If the variable is unset, then immediately recreate it unless
- * the whole interpreter is going away.
- */
-
- if (flags & TCL_TRACE_UNSETS) {
- if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
- Tcl_SetVar2(interp, name1, name2, butPtr->text,
- flags & TCL_GLOBAL_ONLY);
- Tcl_TraceVar2(interp, name1, name2,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- ButtonTextVarProc, clientData);
- }
- return (char *) NULL;
- }
-
- value = Tcl_GetVar2(interp, name1, name2, flags & TCL_GLOBAL_ONLY);
- if (value == NULL) {
- value = "";
- }
- if (butPtr->text != NULL) {
- ckfree(butPtr->text);
- }
- butPtr->text = ckalloc((unsigned) (strlen(value) + 1));
- strcpy(butPtr->text, value);
- ComputeButtonGeometry(butPtr);
-
- if ((butPtr->tkwin != NULL) && Tk_IsMapped(butPtr->tkwin)
- && !(butPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayButton, (ClientData) butPtr);
- butPtr->flags |= REDRAW_PENDING;
- }
- return (char *) NULL;
- }
-