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- /*
- * tkMenubutton.c --
- *
- * This module implements button-like widgets that are used
- * to invoke pull-down menus.
- *
- * Copyright 1990 Regents of the University of California.
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkMenubutton.c,v 1.33 92/08/21 16:21:47 ouster Exp $ SPRITE (Berkeley)";
- #endif
-
- #include "tkConfig.h"
- #include "default.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 widget. NULL
- * means that the window has been destroyed
- * but the data structures haven't yet been
- * cleaned up.*/
- Tcl_Interp *interp; /* Interpreter associated with menu button. */
- char *menuName; /* Name of menu associated with widget (used
- * to generate post and unpost commands).
- * Malloc-ed. */
- Tk_Uid varName; /* Name of variable associated with collection
- * of menu bars: used to allow scanning of
- * menus. Also used as identifier for
- * menu group. */
-
- /*
- * Information about what's displayed in the menu button:
- */
-
- char *text; /* Text to display in button (malloc'ed)
- * or NULL. */
- int textLength; /* # of characters in text. */
- int underline; /* Index of character to underline. */
- 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 and underline
- * 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. */
- GC activeTextGC; /* GC for drawing text in active mode (NULL
- * means use normalTextGC). */
- Pixmap gray; /* Pixmap for displaying disabled text/icon 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; /* Amount text sticks left from its origin,
- * in pixels. */
- 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 window region. */
-
- /*
- * Miscellaneous information:
- */
-
- Cursor cursor; /* Current cursor for window, or None. */
- int flags; /* Various flags; see below for
- * definitions. */
- } MenuButton;
-
- /*
- * Flag bits for buttons:
- *
- * REDRAW_PENDING: Non-zero means a DoWhenIdle handler
- * has already been queued to redraw
- * this window.
- * POSTED: Non-zero means that the menu associated
- * with this button has been posted (typically
- * because of an active button press).
- */
-
- #define REDRAW_PENDING 1
- #define POSTED 2
-
- /*
- * Information used for parsing configuration specs:
- */
-
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
- DEF_MENUBUTTON_ACTIVE_BG_COLOR, Tk_Offset(MenuButton, activeBorder),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
- DEF_MENUBUTTON_ACTIVE_BG_MONO, Tk_Offset(MenuButton, activeBorder),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
- DEF_MENUBUTTON_ACTIVE_FG_COLOR, Tk_Offset(MenuButton, activeFg),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
- DEF_MENUBUTTON_ACTIVE_FG_MONO, Tk_Offset(MenuButton, activeFg),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
- DEF_MENUBUTTON_ANCHOR, Tk_Offset(MenuButton, anchor), 0},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_MENUBUTTON_BG_COLOR, Tk_Offset(MenuButton, normalBorder),
- TK_CONFIG_COLOR_ONLY},
- {TK_CONFIG_BORDER, "-background", "background", "Background",
- DEF_MENUBUTTON_BG_MONO, Tk_Offset(MenuButton, normalBorder),
- TK_CONFIG_MONO_ONLY},
- {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_BITMAP, "-bitmap", "bitmap", "Bitmap",
- DEF_MENUBUTTON_BITMAP, Tk_Offset(MenuButton, bitmap),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
- DEF_MENUBUTTON_BORDER_WIDTH, Tk_Offset(MenuButton, borderWidth), 0},
- {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
- DEF_MENUBUTTON_CURSOR, Tk_Offset(MenuButton, cursor),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
- "DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_COLOR,
- Tk_Offset(MenuButton, disabledFg),
- TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
- {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
- "DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_MONO,
- Tk_Offset(MenuButton, disabledFg),
- TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
- {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
- (char *) NULL, 0, 0},
- {TK_CONFIG_FONT, "-font", "font", "Font",
- DEF_MENUBUTTON_FONT, Tk_Offset(MenuButton, fontPtr), 0},
- {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
- DEF_MENUBUTTON_FG, Tk_Offset(MenuButton, normalFg), 0},
- {TK_CONFIG_INT, "-height", "height", "Height",
- DEF_MENUBUTTON_HEIGHT, Tk_Offset(MenuButton, height), 0},
- {TK_CONFIG_STRING, "-menu", "menu", "Menu",
- DEF_MENUBUTTON_MENU, Tk_Offset(MenuButton, menuName), 0},
- {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
- DEF_MENUBUTTON_PADX, Tk_Offset(MenuButton, padX), 0},
- {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
- DEF_MENUBUTTON_PADY, Tk_Offset(MenuButton, padY), 0},
- {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
- DEF_MENUBUTTON_RELIEF, Tk_Offset(MenuButton, relief), 0},
- {TK_CONFIG_UID, "-state", "state", "State",
- DEF_MENUBUTTON_STATE, Tk_Offset(MenuButton, state), 0},
- {TK_CONFIG_STRING, "-text", "text", "Text",
- DEF_MENUBUTTON_TEXT, Tk_Offset(MenuButton, text), 0},
- {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
- DEF_MENUBUTTON_TEXT_VARIABLE, Tk_Offset(MenuButton, textVarName),
- TK_CONFIG_NULL_OK},
- {TK_CONFIG_INT, "-underline", "underline", "Underline",
- DEF_MENUBUTTON_UNDERLINE, Tk_Offset(MenuButton, underline), 0},
- {TK_CONFIG_UID, "-variable", "variable", "Variable",
- DEF_MENUBUTTON_VARIABLE, Tk_Offset(MenuButton, varName), 0},
- {TK_CONFIG_INT, "-width", "width", "Width",
- DEF_MENUBUTTON_WIDTH, Tk_Offset(MenuButton, width), 0},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
-
- /*
- * Forward declarations for procedures defined later in this file:
- */
-
- static void ComputeMenuButtonGeometry _ANSI_ARGS_((
- MenuButton *mbPtr));
- static void MenuButtonEventProc _ANSI_ARGS_((ClientData clientData,
- XEvent *eventPtr));
- static char * MenuButtonTextVarProc _ANSI_ARGS_((
- ClientData clientData, Tcl_Interp *interp,
- char *name1, char *name2, int flags));
- static char * MenuButtonVarProc _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, char *name1, char *name2,
- int flags));
- static int MenuButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
- Tcl_Interp *interp, int argc, char **argv));
- static int ConfigureMenuButton _ANSI_ARGS_((Tcl_Interp *interp,
- MenuButton *mbPtr, int argc, char **argv,
- int flags));
- static void DestroyMenuButton _ANSI_ARGS_((ClientData clientData));
- static void DisplayMenuButton _ANSI_ARGS_((ClientData clientData));
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_MenubuttonCmd --
- *
- * 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_MenubuttonCmd(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 MenuButton *mbPtr;
- 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;
- }
-
- /*
- * 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.
- */
-
- mbPtr = (MenuButton *) ckalloc(sizeof(MenuButton));
- mbPtr->tkwin = new;
- mbPtr->interp = interp;
- mbPtr->menuName = NULL;
- mbPtr->varName = NULL;
- mbPtr->text = NULL;
- mbPtr->underline = -1;
- mbPtr->textVarName = NULL;
- mbPtr->bitmap = None;
- mbPtr->state = tkNormalUid;
- mbPtr->normalBorder = NULL;
- mbPtr->activeBorder = NULL;
- mbPtr->borderWidth = 0;
- mbPtr->relief = TK_RELIEF_FLAT;
- mbPtr->fontPtr = NULL;
- mbPtr->normalFg = NULL;
- mbPtr->activeFg = NULL;
- mbPtr->disabledFg = NULL;
- mbPtr->normalTextGC = NULL;
- mbPtr->activeTextGC = NULL;
- mbPtr->gray = None;
- mbPtr->disabledGC = NULL;
- mbPtr->cursor = None;
- mbPtr->flags = 0;
-
- Tk_SetClass(mbPtr->tkwin, "Menubutton");
- Tk_CreateEventHandler(mbPtr->tkwin, ExposureMask|StructureNotifyMask,
- MenuButtonEventProc, (ClientData) mbPtr);
- Tcl_CreateCommand(interp, Tk_PathName(mbPtr->tkwin), MenuButtonWidgetCmd,
- (ClientData) mbPtr, (void (*)()) NULL);
- if (ConfigureMenuButton(interp, mbPtr, argc-2, argv+2, 0) != TCL_OK) {
- Tk_DestroyWindow(mbPtr->tkwin);
- return TCL_ERROR;
- }
-
- interp->result = Tk_PathName(mbPtr->tkwin);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * MenuButtonWidgetCmd --
- *
- * 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
- MenuButtonWidgetCmd(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 MenuButton *mbPtr = (MenuButton *) clientData;
- int result = TCL_OK;
- int length;
- char c;
-
- if (argc < 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
- " option ?arg arg ...?\"", (char *) NULL);
- return TCL_ERROR;
- }
- Tk_Preserve((ClientData) mbPtr);
- c = argv[1][0];
- length = strlen(argv[1]);
- if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)) {
- if (argc > 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " activate\"", (char *) NULL);
- goto error;
- }
- if (mbPtr->state != tkDisabledUid) {
- mbPtr->state = tkActiveUid;
- Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->activeBorder);
- goto redisplay;
- }
- } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
- if (argc == 2) {
- result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
- (char *) mbPtr, (char *) NULL, 0);
- } else if (argc == 3) {
- result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
- (char *) mbPtr, argv[2], 0);
- } else {
- result = ConfigureMenuButton(interp, mbPtr, argc-2, argv+2,
- TK_CONFIG_ARGV_ONLY);
- }
- } else if ((c == 'd') && (strncmp(argv[1], "deactivate", length) == 0)) {
- if (argc > 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " deactivate\"", (char *) NULL);
- goto error;
- }
- if (mbPtr->state != tkDisabledUid) {
- mbPtr->state = tkNormalUid;
- Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->normalBorder);
- goto redisplay;
- }
- } else if ((c == 'p') && (strncmp(argv[1], "post", length) == 0)) {
- if (argc > 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " post\"", (char *) NULL);
- goto error;
- }
- if ((mbPtr->flags & POSTED) || (mbPtr->menuName == NULL)
- || (mbPtr->state == tkDisabledUid)) {
- goto done;
- }
-
- /*
- * Store the name of the posted menu into the associated variable.
- * This will cause any other menu posted via that variable to
- * unpost itself and will cause this menu to post itself.
- */
-
- Tcl_SetVar(interp, mbPtr->varName, Tk_PathName(mbPtr->tkwin),
- TCL_GLOBAL_ONLY);
- } else if ((c == 'u') && (strncmp(argv[1], "unpost", length) == 0)) {
- if (argc > 2) {
- Tcl_AppendResult(interp, "wrong # args: should be \"",
- argv[0], " unpost\"", (char *) NULL);
- goto error;
- }
-
- /*
- * The one-liner below looks simple, but it isn't. This code
- * does the right thing even if this menu isn't posted anymore,
- * but some other variable associated with the same variable
- * is posted instead: it unposts whatever is posted. This
- * approach is necessary because at present ButtonRelease
- * events go to the menu button where the mouse button was
- * first pressed; this may not be the same menu button that's
- * currently active.
- */
- Tcl_SetVar(interp, mbPtr->varName, "", TCL_GLOBAL_ONLY);
- } else {
- Tcl_AppendResult(interp, "bad option \"", argv[1],
- "\": must be activate, configure, deactivate, ",
- "post, or unpost", (char *) NULL);
- goto error;
- }
- done:
- Tk_Release((ClientData) mbPtr);
- return result;
-
- redisplay:
- if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
- mbPtr->flags |= REDRAW_PENDING;
- }
- goto done;
-
- error:
- Tk_Release((ClientData) mbPtr);
- return TCL_ERROR;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DestroyMenuButton --
- *
- * This procedure is invoked to recycle all of the resources
- * associated with a button widget. It is invoked as a
- * when-idle handler in order to make sure that there is no
- * other use of the button pending at the time of the deletion.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Everything associated with the widget is freed up.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DestroyMenuButton(clientData)
- ClientData clientData; /* Info about button widget. */
- {
- register MenuButton *mbPtr = (MenuButton *) clientData;
- if (mbPtr->menuName != NULL) {
- ckfree(mbPtr->menuName);
- }
- if (mbPtr->varName != NULL) {
- Tcl_UntraceVar(mbPtr->interp, mbPtr->varName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonVarProc, (ClientData) mbPtr);
- }
- if (mbPtr->text != NULL) {
- ckfree(mbPtr->text);
- }
- if (mbPtr->textVarName != NULL) {
- Tcl_UntraceVar(mbPtr->interp, mbPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonTextVarProc, (ClientData) mbPtr);
- ckfree(mbPtr->textVarName);
- }
- if (mbPtr->bitmap != None) {
- Tk_FreeBitmap(mbPtr->bitmap);
- }
- if (mbPtr->normalBorder != NULL) {
- Tk_Free3DBorder(mbPtr->normalBorder);
- }
- if (mbPtr->activeBorder != NULL) {
- Tk_Free3DBorder(mbPtr->activeBorder);
- }
- if (mbPtr->fontPtr != NULL) {
- Tk_FreeFontStruct(mbPtr->fontPtr);
- }
- if (mbPtr->normalFg != NULL) {
- Tk_FreeColor(mbPtr->normalFg);
- }
- if (mbPtr->activeFg != NULL) {
- Tk_FreeColor(mbPtr->activeFg);
- }
- if (mbPtr->disabledFg != NULL) {
- Tk_FreeColor(mbPtr->disabledFg);
- }
- if (mbPtr->normalTextGC != None) {
- Tk_FreeGC(mbPtr->normalTextGC);
- }
- if (mbPtr->activeTextGC != None) {
- Tk_FreeGC(mbPtr->activeTextGC);
- }
- if (mbPtr->gray != None) {
- Tk_FreeBitmap(mbPtr->gray);
- }
- if (mbPtr->disabledGC != None) {
- Tk_FreeGC(mbPtr->disabledGC);
- }
- if (mbPtr->cursor != None) {
- Tk_FreeCursor(mbPtr->cursor);
- }
- ckfree((char *) mbPtr);
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ConfigureMenuButton --
- *
- * This procedure is called to process an argv/argc list, plus
- * the Tk option database, in order to configure (or
- * reconfigure) a menubutton 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 mbPtr; old resources get freed, if there
- * were any. The menubutton is redisplayed.
- *
- *----------------------------------------------------------------------
- */
-
- static int
- ConfigureMenuButton(interp, mbPtr, argc, argv, flags)
- Tcl_Interp *interp; /* Used for error reporting. */
- register MenuButton *mbPtr; /* 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;
- int result;
- Tk_Uid oldGroup;
- char *value;
-
- /*
- * Eliminate any existing traces on variables monitored by the button.
- */
-
- if (mbPtr->varName != NULL) {
- Tcl_UntraceVar(interp, mbPtr->varName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonVarProc, (ClientData) mbPtr);
- }
- if (mbPtr->textVarName != NULL) {
- Tcl_UntraceVar(interp, mbPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonTextVarProc, (ClientData) mbPtr);
- }
-
- oldGroup = mbPtr->varName;
- result = Tk_ConfigureWidget(interp, mbPtr->tkwin, configSpecs,
- argc, argv, (char *) mbPtr, flags);
- if (oldGroup != mbPtr->varName) {
- Tk_UnshareEvents(mbPtr->tkwin, oldGroup);
- Tk_ShareEvents(mbPtr->tkwin, mbPtr->varName);
- }
- if (result != 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 (mbPtr->state == tkActiveUid) {
- Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->activeBorder);
- } else {
- Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->normalBorder);
- if ((mbPtr->state != tkNormalUid) && (mbPtr->state != tkDisabledUid)) {
- Tcl_AppendResult(interp, "bad state value \"", mbPtr->state,
- "\": must be normal, active, or disabled", (char *) NULL);
- mbPtr->state = tkNormalUid;
- return TCL_ERROR;
- }
- }
-
- gcValues.font = mbPtr->fontPtr->fid;
- gcValues.foreground = mbPtr->normalFg->pixel;
- gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
-
- /*
- * Note: GraphicsExpose events are disabled in GC's because they're
- * 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(mbPtr->tkwin,
- GCForeground|GCBackground|GCFont|GCGraphicsExposures, &gcValues);
- if (mbPtr->normalTextGC != None) {
- Tk_FreeGC(mbPtr->normalTextGC);
- }
- mbPtr->normalTextGC = newGC;
-
- gcValues.font = mbPtr->fontPtr->fid;
- gcValues.foreground = mbPtr->activeFg->pixel;
- gcValues.background = Tk_3DBorderColor(mbPtr->activeBorder)->pixel;
- newGC = Tk_GetGC(mbPtr->tkwin, GCForeground|GCBackground|GCFont,
- &gcValues);
- if (mbPtr->activeTextGC != None) {
- Tk_FreeGC(mbPtr->activeTextGC);
- }
- mbPtr->activeTextGC = newGC;
-
- gcValues.font = mbPtr->fontPtr->fid;
- gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
- if (mbPtr->disabledFg != NULL) {
- gcValues.foreground = mbPtr->disabledFg->pixel;
- mask = GCForeground|GCBackground|GCFont;
- } else {
- gcValues.foreground = gcValues.background;
- if (mbPtr->gray == None) {
- mbPtr->gray = Tk_GetBitmap(interp, mbPtr->tkwin,
- Tk_GetUid("gray50"));
- if (mbPtr->gray == None) {
- return TCL_ERROR;
- }
- }
- gcValues.fill_style = FillStippled;
- gcValues.stipple = mbPtr->gray;
- mask = GCForeground|GCFillStyle|GCStipple;
- }
- newGC = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
- if (mbPtr->disabledGC != None) {
- Tk_FreeGC(mbPtr->disabledGC);
- }
- mbPtr->disabledGC = newGC;
-
- if (mbPtr->padX < 0) {
- mbPtr->padX = 0;
- }
- if (mbPtr->padY < 0) {
- mbPtr->padY = 0;
- }
-
- /*
- * Set up a trace on the menu button's variable, then initialize
- * the variable if it doesn't already exist, so that it can be
- * accessed immediately from Tcl code without fear of
- * "nonexistent variable" errors.
- */
-
- value = Tcl_GetVar(interp, mbPtr->varName, TCL_GLOBAL_ONLY);
- if (value == NULL) {
- Tcl_SetVar(interp, mbPtr->varName, "", TCL_GLOBAL_ONLY);
- }
- Tcl_TraceVar(interp, mbPtr->varName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonVarProc, (ClientData) mbPtr);
-
- /*
- * Set up a trace on the variable that determines what's displayed
- * in the menu button, if such a trace has been requested.
- */
-
- if ((mbPtr->bitmap == None) && (mbPtr->textVarName != NULL)) {
- char *value;
-
- value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
- if (value == NULL) {
- Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
- TCL_GLOBAL_ONLY);
- } else {
- if (mbPtr->text != NULL) {
- ckfree(mbPtr->text);
- }
- mbPtr->text = ckalloc((unsigned) (strlen(value) + 1));
- strcpy(mbPtr->text, value);
- }
- Tcl_TraceVar(interp, mbPtr->textVarName,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonTextVarProc, (ClientData) mbPtr);
- }
-
- /*
- * Recompute the geometry for the button.
- */
-
- ComputeMenuButtonGeometry(mbPtr);
-
- /*
- * Lastly, arrange for the button to be redisplayed.
- */
-
- if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
- mbPtr->flags |= REDRAW_PENDING;
- }
-
- return TCL_OK;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * DisplayMenuButton --
- *
- * This procedure is invoked to display a menubutton widget.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Commands are output to X to display the menubutton in its
- * current mode.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- DisplayMenuButton(clientData)
- ClientData clientData; /* Information about widget. */
- {
- register MenuButton *mbPtr = (MenuButton *) clientData;
- GC gc;
- Tk_3DBorder border;
- Pixmap pixmap;
- int x = 0; /* Initialization needed only to stop
- * compiler warning. */
- int y;
- register Tk_Window tkwin = mbPtr->tkwin;
-
- mbPtr->flags &= ~REDRAW_PENDING;
- if ((mbPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
- return;
- }
-
- if ((mbPtr->state == tkDisabledUid) && (mbPtr->disabledFg != NULL)) {
- gc = mbPtr->disabledGC;
- border = mbPtr->normalBorder;
- } else if (mbPtr->state == tkActiveUid) {
- gc = mbPtr->activeTextGC;
- border = mbPtr->activeBorder;
- } else {
- gc = mbPtr->normalTextGC;
- border = mbPtr->normalBorder;
- }
-
- /*
- * In order to avoid screen flashes, this procedure redraws
- * the menu 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(Tk_Display(tkwin), Tk_WindowId(tkwin),
- Tk_Width(tkwin), Tk_Height(tkwin),
- DefaultDepthOfScreen(Tk_Screen(tkwin)));
- Tk_Fill3DRectangle(Tk_Display(tkwin), pixmap, border,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
-
- /*
- * Display bitmap or text for button.
- */
-
- if (mbPtr->bitmap != None) {
- unsigned int width, height;
-
- Tk_SizeOfBitmap(mbPtr->bitmap, &width, &height);
- switch (mbPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
- x += mbPtr->borderWidth + mbPtr->padX;
- break;
- case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
- x += (Tk_Width(tkwin) - width)/2;
- break;
- default:
- x += Tk_Width(tkwin) - mbPtr->borderWidth - mbPtr->padX
- - width;
- break;
- }
- switch (mbPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
- y = mbPtr->borderWidth + mbPtr->padY;
- 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) - mbPtr->borderWidth - mbPtr->padY
- - height;
- break;
- }
- XCopyPlane(Tk_Display(tkwin), mbPtr->bitmap, pixmap,
- gc, 0, 0, width, height, x, y, 1);
- } else {
- switch (mbPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
- x = mbPtr->borderWidth + mbPtr->padX + mbPtr->leftBearing;
- break;
- case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
- x = (Tk_Width(tkwin) + mbPtr->leftBearing
- - mbPtr->rightBearing)/2;
- break;
- default:
- x = Tk_Width(tkwin) - mbPtr->borderWidth - mbPtr->padX
- - mbPtr->rightBearing;
- break;
- }
- switch (mbPtr->anchor) {
- case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
- y = mbPtr->borderWidth + mbPtr->fontPtr->ascent
- + mbPtr->padY;
- break;
- case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
- y = (Tk_Height(tkwin) + mbPtr->fontPtr->ascent
- - mbPtr->fontPtr->descent)/2;
- break;
- default:
- y = Tk_Height(tkwin) - mbPtr->borderWidth - mbPtr->padY
- - mbPtr->fontPtr->descent;
- break;
- }
- XDrawString(Tk_Display(tkwin), pixmap, gc, x, y, mbPtr->text,
- mbPtr->textLength);
- if (mbPtr->underline >= 0) {
- TkUnderlineChars(Tk_Display(tkwin), pixmap, gc, mbPtr->fontPtr,
- mbPtr->text, x, y, TK_NEWLINES_NOT_SPECIAL,
- mbPtr->underline, mbPtr->underline);
- }
- }
-
- /*
- * If the menu button is disabled with a stipple rather than a special
- * foreground color, generate the stippled effect.
- */
-
- if ((mbPtr->state == tkDisabledUid) && (mbPtr->disabledFg == NULL)) {
- XFillRectangle(Tk_Display(tkwin), pixmap, mbPtr->disabledGC,
- mbPtr->borderWidth, mbPtr->borderWidth,
- (unsigned) (Tk_Width(tkwin) - 2*mbPtr->borderWidth),
- (unsigned) (Tk_Height(tkwin) - 2*mbPtr->borderWidth));
- }
-
- /*
- * Draw the border last. This way, if the menu button's contents
- * overflow onto the border they'll be covered up by the border.
- */
-
- if (mbPtr->relief != TK_RELIEF_FLAT) {
- Tk_Draw3DRectangle(Tk_Display(tkwin), pixmap, border,
- 0, 0, Tk_Width(tkwin), Tk_Height(tkwin),
- mbPtr->borderWidth, mbPtr->relief);
- }
-
- /*
- * Copy the information from the off-screen pixmap onto the screen,
- * then delete the pixmap.
- */
-
- XCopyArea(Tk_Display(tkwin), pixmap, Tk_WindowId(tkwin),
- mbPtr->normalTextGC, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin), 0, 0);
- XFreePixmap(Tk_Display(tkwin), pixmap);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * MenuButtonEventProc --
- *
- * 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
- MenuButtonEventProc(clientData, eventPtr)
- ClientData clientData; /* Information about window. */
- XEvent *eventPtr; /* Information about event. */
- {
- MenuButton *mbPtr = (MenuButton *) clientData;
- if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
- if ((mbPtr->tkwin != NULL) && !(mbPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
- mbPtr->flags |= REDRAW_PENDING;
- }
- } else if (eventPtr->type == DestroyNotify) {
- Tcl_DeleteCommand(mbPtr->interp, Tk_PathName(mbPtr->tkwin));
-
- /*
- * Careful! Must delete the event-sharing information here
- * rather than in DestroyMenuButton. By the time that procedure
- * is called the tkwin may have been reused, resulting in some
- * other window accidentally being cut off from shared events.
- */
-
- Tk_UnshareEvents(mbPtr->tkwin, mbPtr->varName);
- mbPtr->tkwin = NULL;
- if (mbPtr->flags & REDRAW_PENDING) {
- Tk_CancelIdleCall(DisplayMenuButton, (ClientData) mbPtr);
- }
- Tk_EventuallyFree((ClientData) mbPtr, DestroyMenuButton);
- }
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * ComputeMenuButtonGeometry --
- *
- * After changes in a menu button's text or bitmap, this procedure
- * recomputes the menu button's geometry and passes this information
- * along to the geometry manager for the window.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The menu button's window may change size.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- ComputeMenuButtonGeometry(mbPtr)
- register MenuButton *mbPtr; /* Widget record for menu button. */
- {
- XCharStruct bbox;
- int dummy;
- unsigned int width, height;
-
- if (mbPtr->bitmap != None) {
- Tk_SizeOfBitmap(mbPtr->bitmap, &width, &height);
- if (mbPtr->width > 0) {
- width = mbPtr->width;
- }
- if (mbPtr->height > 0) {
- height = mbPtr->height;
- }
- } else {
- mbPtr->textLength = strlen(mbPtr->text);
- XTextExtents(mbPtr->fontPtr, mbPtr->text, mbPtr->textLength,
- &dummy, &dummy, &dummy, &bbox);
- mbPtr->leftBearing = bbox.lbearing;
- mbPtr->rightBearing = bbox.rbearing;
- width = bbox.lbearing + bbox.rbearing;
- height = mbPtr->fontPtr->ascent + mbPtr->fontPtr->descent;
- if (mbPtr->width > 0) {
- width = mbPtr->width * XTextWidth(mbPtr->fontPtr, "0", 1);
- }
- if (mbPtr->height > 0) {
- height *= mbPtr->height;
- }
- }
-
- width += 2*mbPtr->padX;
- height += 2*mbPtr->padY;
- Tk_GeometryRequest(mbPtr->tkwin, (int) (width + 2*mbPtr->borderWidth),
- (int) (height + 2*mbPtr->borderWidth));
- Tk_SetInternalBorder(mbPtr->tkwin, mbPtr->borderWidth);
- }
-
- /*
- *--------------------------------------------------------------
- *
- * MenuButtonVarProc --
- *
- * This procedure is invoked when someone changes the
- * state variable associated with a menubutton. This causes
- * the posted/unposted state of the menu to change if needed
- * to match the variable's new value.
- *
- * Results:
- * NULL is always returned.
- *
- * Side effects:
- * The menu may be posted or unposted.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static char *
- MenuButtonVarProc(clientData, interp, name1, name2, flags)
- ClientData clientData; /* Information about button. */
- Tcl_Interp *interp; /* Interpreter containing variable. */
- char *name1; /* First part of variable's name. */
- char *name2; /* Second part of variable's name. */
- int flags; /* Describes what's happening to variable. */
- {
- register MenuButton *mbPtr = (MenuButton *) clientData;
- char *value;
- int newFlags;
-
- /*
- * If the variable is being unset, then just re-establish the
- * trace unless the whole interpreter is going away. Also unpost
- * the menu.
- */
-
- newFlags = mbPtr->flags;
- if (flags & TCL_TRACE_UNSETS) {
- newFlags &= ~POSTED;
- if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
- Tcl_TraceVar2(interp, name1, name2,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonVarProc, clientData);
- }
- } else {
-
- /*
- * Use the value of the variable to update the posted status of
- * the menu.
- */
-
- value = Tcl_GetVar2(interp, name1, name2, flags & TCL_GLOBAL_ONLY);
- if (strcmp(value, Tk_PathName(mbPtr->tkwin)) == 0) {
- newFlags |= POSTED;
- } else {
- newFlags &= ~POSTED;
- }
- }
-
- if ((mbPtr->menuName != NULL) && (newFlags != mbPtr->flags)) {
- mbPtr->flags = newFlags;
- if (newFlags & POSTED) {
- int x, y;
- char string[50];
-
- /*
- * Post the menu just below the menu button.
- */
-
- Tk_GetRootCoords(mbPtr->tkwin, &x, &y);
- y += Tk_Height(mbPtr->tkwin);
- sprintf(string, "%d %d ", x, y);
- if (Tcl_VarEval(interp, mbPtr->menuName, " post ", string,
- mbPtr->varName, (char *) NULL) != TCL_OK) {
- TkBindError(interp);
- }
- } else {
- if (Tcl_VarEval(interp, mbPtr->menuName, " unpost",
- (char *) NULL) != TCL_OK) {
- TkBindError(interp);
- }
- }
- }
- return (char *) NULL;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * MenuButtonTextVarProc --
- *
- * This procedure is invoked when someone changes the variable
- * whose contents are to be displayed in a menu button.
- *
- * Results:
- * NULL is always returned.
- *
- * Side effects:
- * The text displayed in the menu button will change to match the
- * variable.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
- static char *
- MenuButtonTextVarProc(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 MenuButton *mbPtr = (MenuButton *) 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, mbPtr->text,
- flags & TCL_GLOBAL_ONLY);
- Tcl_TraceVar2(interp, name1, name2,
- TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
- MenuButtonTextVarProc, clientData);
- }
- return (char *) NULL;
- }
-
- value = Tcl_GetVar2(interp, name1, name2, flags & TCL_GLOBAL_ONLY);
- if (value == NULL) {
- value = "";
- }
- if (mbPtr->text != NULL) {
- ckfree(mbPtr->text);
- }
- mbPtr->text = ckalloc((unsigned) (strlen(value) + 1));
- strcpy(mbPtr->text, value);
- ComputeMenuButtonGeometry(mbPtr);
-
- if ((mbPtr->tkwin != NULL) && Tk_IsMapped(mbPtr->tkwin)
- && !(mbPtr->flags & REDRAW_PENDING)) {
- Tk_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
- mbPtr->flags |= REDRAW_PENDING;
- }
- return (char *) NULL;
- }
-