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diff --git a/generic/tkMessage.c b/generic/tkMessage.c
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+++ b/generic/tkMessage.c
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+/*
+ * tkMessage.c --
+ *
+ * This module implements a message widgets for the Tk
+ * toolkit. A message widget displays a multi-line string
+ * in a window according to a particular aspect ratio.
+ *
+ * Copyright (c) 1990-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkMessage.c 1.75 97/07/31 09:11:14
+ */
+
+#include "tkPort.h"
+#include "default.h"
+#include "tkInt.h"
+
+/*
+ * A data structure of the following type is kept for each message
+ * widget managed by this file:
+ */
+
+typedef struct {
+ Tk_Window tkwin; /* Window that embodies the message. NULL
+ * means that the window has been destroyed
+ * but the data structures haven't yet been
+ * cleaned up.*/
+ Display *display; /* Display containing widget. Used, among
+ * other things, so that resources can be
+ * freed even after tkwin has gone away. */
+ Tcl_Interp *interp; /* Interpreter associated with message. */
+ Tcl_Command widgetCmd; /* Token for message's widget command. */
+
+ /*
+ * Information used when displaying widget:
+ */
+
+ char *string; /* String displayed in message. */
+ int numChars; /* Number of characters in string, not
+ * including terminating NULL character. */
+ char *textVarName; /* Name of variable (malloc'ed) or NULL.
+ * If non-NULL, message displays the contents
+ * of this variable. */
+ Tk_3DBorder border; /* Structure used to draw 3-D border and
+ * background. NULL means a border hasn't
+ * been created yet. */
+ int borderWidth; /* Width of border. */
+ int relief; /* 3-D effect: TK_RELIEF_RAISED, etc. */
+ int highlightWidth; /* Width in pixels of highlight to draw
+ * around widget when it has the focus.
+ * <= 0 means don't draw a highlight. */
+ XColor *highlightBgColorPtr;
+ /* Color for drawing traversal highlight
+ * area when highlight is off. */
+ XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
+ Tk_Font tkfont; /* Information about text font, or NULL. */
+ XColor *fgColorPtr; /* Foreground color in normal mode. */
+ int padX, padY; /* User-requested extra space around text. */
+ int width; /* User-requested width, in pixels. 0 means
+ * compute width using aspect ratio below. */
+ int aspect; /* Desired aspect ratio for window
+ * (100*width/height). */
+ int msgWidth; /* Width in pixels needed to display
+ * message. */
+ int msgHeight; /* Height in pixels needed to display
+ * message. */
+ Tk_Anchor anchor; /* Where to position text within window region
+ * if window is larger or smaller than
+ * needed. */
+ Tk_Justify justify; /* Justification for text. */
+
+ GC textGC; /* GC for drawing text in normal mode. */
+ Tk_TextLayout textLayout; /* Saved layout information. */
+
+ /*
+ * Miscellaneous information:
+ */
+
+ Tk_Cursor cursor; /* Current cursor for window, or None. */
+ char *takeFocus; /* Value of -takefocus option; not used in
+ * the C code, but used by keyboard traversal
+ * scripts. Malloc'ed, but may be NULL. */
+ int flags; /* Various flags; see below for
+ * definitions. */
+} Message;
+
+/*
+ * Flag bits for messages:
+ *
+ * REDRAW_PENDING: Non-zero means a DoWhenIdle handler
+ * has already been queued to redraw
+ * this window.
+ * GOT_FOCUS: Non-zero means this button currently
+ * has the input focus.
+ */
+
+#define REDRAW_PENDING 1
+#define GOT_FOCUS 4
+
+/*
+ * Information used for argv parsing.
+ */
+
+static Tk_ConfigSpec configSpecs[] = {
+ {TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
+ DEF_MESSAGE_ANCHOR, Tk_Offset(Message, anchor), 0},
+ {TK_CONFIG_INT, "-aspect", "aspect", "Aspect",
+ DEF_MESSAGE_ASPECT, Tk_Offset(Message, aspect), 0},
+ {TK_CONFIG_BORDER, "-background", "background", "Background",
+ DEF_MESSAGE_BG_COLOR, Tk_Offset(Message, border),
+ TK_CONFIG_COLOR_ONLY},
+ {TK_CONFIG_BORDER, "-background", "background", "Background",
+ DEF_MESSAGE_BG_MONO, Tk_Offset(Message, border),
+ 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_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
+ DEF_MESSAGE_BORDER_WIDTH, Tk_Offset(Message, borderWidth), 0},
+ {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
+ DEF_MESSAGE_CURSOR, Tk_Offset(Message, cursor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
+ (char *) NULL, 0, 0},
+ {TK_CONFIG_FONT, "-font", "font", "Font",
+ DEF_MESSAGE_FONT, Tk_Offset(Message, tkfont), 0},
+ {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
+ DEF_MESSAGE_FG, Tk_Offset(Message, fgColorPtr), 0},
+ {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
+ "HighlightBackground", DEF_MESSAGE_HIGHLIGHT_BG,
+ Tk_Offset(Message, highlightBgColorPtr), 0},
+ {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
+ DEF_MESSAGE_HIGHLIGHT, Tk_Offset(Message, highlightColorPtr), 0},
+ {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+ "HighlightThickness",
+ DEF_MESSAGE_HIGHLIGHT_WIDTH, Tk_Offset(Message, highlightWidth), 0},
+ {TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
+ DEF_MESSAGE_JUSTIFY, Tk_Offset(Message, justify), 0},
+ {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
+ DEF_MESSAGE_PADX, Tk_Offset(Message, padX), 0},
+ {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
+ DEF_MESSAGE_PADY, Tk_Offset(Message, padY), 0},
+ {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+ DEF_MESSAGE_RELIEF, Tk_Offset(Message, relief), 0},
+ {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+ DEF_MESSAGE_TAKE_FOCUS, Tk_Offset(Message, takeFocus),
+ TK_CONFIG_NULL_OK},
+ {TK_CONFIG_STRING, "-text", "text", "Text",
+ DEF_MESSAGE_TEXT, Tk_Offset(Message, string), 0},
+ {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
+ DEF_MESSAGE_TEXT_VARIABLE, Tk_Offset(Message, textVarName),
+ TK_CONFIG_NULL_OK},
+ {TK_CONFIG_PIXELS, "-width", "width", "Width",
+ DEF_MESSAGE_WIDTH, Tk_Offset(Message, 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 MessageCmdDeletedProc _ANSI_ARGS_((
+ ClientData clientData));
+static void MessageEventProc _ANSI_ARGS_((ClientData clientData,
+ XEvent *eventPtr));
+static char * MessageTextVarProc _ANSI_ARGS_((ClientData clientData,
+ Tcl_Interp *interp, char *name1, char *name2,
+ int flags));
+static int MessageWidgetCmd _ANSI_ARGS_((ClientData clientData,
+ Tcl_Interp *interp, int argc, char **argv));
+static void MessageWorldChanged _ANSI_ARGS_((
+ ClientData instanceData));
+static void ComputeMessageGeometry _ANSI_ARGS_((Message *msgPtr));
+static int ConfigureMessage _ANSI_ARGS_((Tcl_Interp *interp,
+ Message *msgPtr, int argc, char **argv,
+ int flags));
+static void DestroyMessage _ANSI_ARGS_((char *memPtr));
+static void DisplayMessage _ANSI_ARGS_((ClientData clientData));
+
+/*
+ * The structure below defines message class behavior by means of procedures
+ * that can be invoked from generic window code.
+ */
+
+static TkClassProcs messageClass = {
+ NULL, /* createProc. */
+ MessageWorldChanged, /* geometryProc. */
+ NULL /* modalProc. */
+};
+
+
+/*
+ *--------------------------------------------------------------
+ *
+ * Tk_MessageCmd --
+ *
+ * This procedure is invoked to process the "message" Tcl
+ * command. See the user documentation for details on what
+ * it does.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * See the user documentation.
+ *
+ *--------------------------------------------------------------
+ */
+
+int
+Tk_MessageCmd(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 Message *msgPtr;
+ Tk_Window new;
+ Tk_Window tkwin = (Tk_Window) clientData;
+
+ if (argc < 2) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"",
+ argv[0], " pathName ?options?\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
+ if (new == NULL) {
+ return TCL_ERROR;
+ }
+
+ msgPtr = (Message *) ckalloc(sizeof(Message));
+ msgPtr->tkwin = new;
+ msgPtr->display = Tk_Display(new);
+ msgPtr->interp = interp;
+ msgPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(msgPtr->tkwin),
+ MessageWidgetCmd, (ClientData) msgPtr, MessageCmdDeletedProc);
+ msgPtr->textLayout = NULL;
+ msgPtr->string = NULL;
+ msgPtr->numChars = 0;
+ msgPtr->textVarName = NULL;
+ msgPtr->border = NULL;
+ msgPtr->borderWidth = 0;
+ msgPtr->relief = TK_RELIEF_FLAT;
+ msgPtr->highlightWidth = 0;
+ msgPtr->highlightBgColorPtr = NULL;
+ msgPtr->highlightColorPtr = NULL;
+ msgPtr->tkfont = NULL;
+ msgPtr->fgColorPtr = NULL;
+ msgPtr->textGC = None;
+ msgPtr->padX = 0;
+ msgPtr->padY = 0;
+ msgPtr->anchor = TK_ANCHOR_CENTER;
+ msgPtr->width = 0;
+ msgPtr->aspect = 150;
+ msgPtr->msgWidth = 0;
+ msgPtr->msgHeight = 0;
+ msgPtr->justify = TK_JUSTIFY_LEFT;
+ msgPtr->cursor = None;
+ msgPtr->takeFocus = NULL;
+ msgPtr->flags = 0;
+
+ Tk_SetClass(msgPtr->tkwin, "Message");
+ TkSetClassProcs(msgPtr->tkwin, &messageClass, (ClientData) msgPtr);
+ Tk_CreateEventHandler(msgPtr->tkwin,
+ ExposureMask|StructureNotifyMask|FocusChangeMask,
+ MessageEventProc, (ClientData) msgPtr);
+ if (ConfigureMessage(interp, msgPtr, argc-2, argv+2, 0) != TCL_OK) {
+ goto error;
+ }
+
+ interp->result = Tk_PathName(msgPtr->tkwin);
+ return TCL_OK;
+
+ error:
+ Tk_DestroyWindow(msgPtr->tkwin);
+ return TCL_ERROR;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MessageWidgetCmd --
+ *
+ * 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
+MessageWidgetCmd(clientData, interp, argc, argv)
+ ClientData clientData; /* Information about message widget. */
+ Tcl_Interp *interp; /* Current interpreter. */
+ int argc; /* Number of arguments. */
+ char **argv; /* Argument strings. */
+{
+ register Message *msgPtr = (Message *) clientData;
+ size_t length;
+ int c;
+
+ if (argc < 2) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
+ " option ?arg arg ...?\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+ c = argv[1][0];
+ length = strlen(argv[1]);
+ if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
+ && (length >= 2)) {
+ if (argc != 3) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"",
+ argv[0], " cget option\"",
+ (char *) NULL);
+ return TCL_ERROR;
+ }
+ return Tk_ConfigureValue(interp, msgPtr->tkwin, configSpecs,
+ (char *) msgPtr, argv[2], 0);
+ } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
+ && (length >= 2)) {
+ if (argc == 2) {
+ return Tk_ConfigureInfo(interp, msgPtr->tkwin, configSpecs,
+ (char *) msgPtr, (char *) NULL, 0);
+ } else if (argc == 3) {
+ return Tk_ConfigureInfo(interp, msgPtr->tkwin, configSpecs,
+ (char *) msgPtr, argv[2], 0);
+ } else {
+ return ConfigureMessage(interp, msgPtr, argc-2, argv+2,
+ TK_CONFIG_ARGV_ONLY);
+ }
+ } else {
+ Tcl_AppendResult(interp, "bad option \"", argv[1],
+ "\": must be cget or configure", (char *) NULL);
+ return TCL_ERROR;
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyMessage --
+ *
+ * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
+ * to clean up the internal structure of a message at a safe time
+ * (when no-one is using it anymore).
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Everything associated with the message is freed up.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DestroyMessage(memPtr)
+ char *memPtr; /* Info about message widget. */
+{
+ register Message *msgPtr = (Message *) memPtr;
+
+ /*
+ * Free up all the stuff that requires special handling, then
+ * let Tk_FreeOptions handle all the standard option-related
+ * stuff.
+ */
+
+ Tk_FreeTextLayout(msgPtr->textLayout);
+ if (msgPtr->textVarName != NULL) {
+ Tcl_UntraceVar(msgPtr->interp, msgPtr->textVarName,
+ TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+ MessageTextVarProc, (ClientData) msgPtr);
+ }
+ if (msgPtr->textGC != None) {
+ Tk_FreeGC(msgPtr->display, msgPtr->textGC);
+ }
+ Tk_FreeOptions(configSpecs, (char *) msgPtr, msgPtr->display, 0);
+ ckfree((char *) msgPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ConfigureMessage --
+ *
+ * This procedure is called to process an argv/argc list, plus
+ * the Tk option database, in order to configure (or
+ * reconfigure) a message 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 msgPtr; old resources get freed, if there
+ * were any.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ConfigureMessage(interp, msgPtr, argc, argv, flags)
+ Tcl_Interp *interp; /* Used for error reporting. */
+ register Message *msgPtr; /* 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. */
+{
+ /*
+ * Eliminate any existing trace on a variable monitored by the message.
+ */
+
+ if (msgPtr->textVarName != NULL) {
+ Tcl_UntraceVar(interp, msgPtr->textVarName,
+ TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+ MessageTextVarProc, (ClientData) msgPtr);
+ }
+
+ if (Tk_ConfigureWidget(interp, msgPtr->tkwin, configSpecs,
+ argc, argv, (char *) msgPtr, flags) != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * If the message 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 (msgPtr->textVarName != NULL) {
+ char *value;
+
+ value = Tcl_GetVar(interp, msgPtr->textVarName, TCL_GLOBAL_ONLY);
+ if (value == NULL) {
+ Tcl_SetVar(interp, msgPtr->textVarName, msgPtr->string,
+ TCL_GLOBAL_ONLY);
+ } else {
+ if (msgPtr->string != NULL) {
+ ckfree(msgPtr->string);
+ }
+ msgPtr->string = strcpy(ckalloc(strlen(value) + 1), value);
+ }
+ Tcl_TraceVar(interp, msgPtr->textVarName,
+ TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+ MessageTextVarProc, (ClientData) msgPtr);
+ }
+
+ /*
+ * A few other options need special processing, such as setting
+ * the background from a 3-D border or handling special defaults
+ * that couldn't be specified to Tk_ConfigureWidget.
+ */
+
+ msgPtr->numChars = strlen(msgPtr->string);
+
+ Tk_SetBackgroundFromBorder(msgPtr->tkwin, msgPtr->border);
+
+ if (msgPtr->highlightWidth < 0) {
+ msgPtr->highlightWidth = 0;
+ }
+
+ MessageWorldChanged((ClientData) msgPtr);
+ return TCL_OK;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * MessageWorldChanged --
+ *
+ * This procedure is called when the world has changed in some
+ * way and the widget needs to recompute all its graphics contexts
+ * and determine its new geometry.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Message will be relayed out and redisplayed.
+ *
+ *---------------------------------------------------------------------------
+ */
+
+static void
+MessageWorldChanged(instanceData)
+ ClientData instanceData; /* Information about widget. */
+{
+ XGCValues gcValues;
+ GC gc;
+ Tk_FontMetrics fm;
+ Message *msgPtr;
+
+ msgPtr = (Message *) instanceData;
+
+ gcValues.font = Tk_FontId(msgPtr->tkfont);
+ gcValues.foreground = msgPtr->fgColorPtr->pixel;
+ gc = Tk_GetGC(msgPtr->tkwin, GCForeground | GCFont, &gcValues);
+ if (msgPtr->textGC != None) {
+ Tk_FreeGC(msgPtr->display, msgPtr->textGC);
+ }
+ msgPtr->textGC = gc;
+
+ Tk_GetFontMetrics(msgPtr->tkfont, &fm);
+ if (msgPtr->padX < 0) {
+ msgPtr->padX = fm.ascent / 2;
+ }
+ if (msgPtr->padY == -1) {
+ msgPtr->padY = fm.ascent / 4;
+ }
+
+ /*
+ * Recompute the desired geometry for the window, and arrange for
+ * the window to be redisplayed.
+ */
+
+ ComputeMessageGeometry(msgPtr);
+ if ((msgPtr->tkwin != NULL) && Tk_IsMapped(msgPtr->tkwin)
+ && !(msgPtr->flags & REDRAW_PENDING)) {
+ Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
+ msgPtr->flags |= REDRAW_PENDING;
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ComputeMessageGeometry --
+ *
+ * Compute the desired geometry for a message window,
+ * taking into account the desired aspect ratio for the
+ * window.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Tk_GeometryRequest is called to inform the geometry
+ * manager of the desired geometry for this window.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+ComputeMessageGeometry(msgPtr)
+ register Message *msgPtr; /* Information about window. */
+{
+ int width, inc, height;
+ int thisWidth, thisHeight, maxWidth;
+ int aspect, lowerBound, upperBound, inset;
+
+ Tk_FreeTextLayout(msgPtr->textLayout);
+
+ inset = msgPtr->borderWidth + msgPtr->highlightWidth;
+
+ /*
+ * Compute acceptable bounds for the final aspect ratio.
+ */
+
+ aspect = msgPtr->aspect/10;
+ if (aspect < 5) {
+ aspect = 5;
+ }
+ lowerBound = msgPtr->aspect - aspect;
+ upperBound = msgPtr->aspect + aspect;
+
+ /*
+ * Do the computation in multiple passes: start off with
+ * a very wide window, and compute its height. Then change
+ * the width and try again. Reduce the size of the change
+ * and iterate until dimensions are found that approximate
+ * the desired aspect ratio. Or, if the user gave an explicit
+ * width then just use that.
+ */
+
+ if (msgPtr->width > 0) {
+ width = msgPtr->width;
+ inc = 0;
+ } else {
+ width = WidthOfScreen(Tk_Screen(msgPtr->tkwin))/2;
+ inc = width/2;
+ }
+
+ for ( ; ; inc /= 2) {
+ msgPtr->textLayout = Tk_ComputeTextLayout(msgPtr->tkfont,
+ msgPtr->string, msgPtr->numChars, width, msgPtr->justify,
+ 0, &thisWidth, &thisHeight);
+ maxWidth = thisWidth + 2 * (inset + msgPtr->padX);
+ height = thisHeight + 2 * (inset + msgPtr->padY);
+
+ if (inc <= 2) {
+ break;
+ }
+ aspect = (100 * maxWidth) / height;
+
+ if (aspect < lowerBound) {
+ width += inc;
+ } else if (aspect > upperBound) {
+ width -= inc;
+ } else {
+ break;
+ }
+ Tk_FreeTextLayout(msgPtr->textLayout);
+ }
+ msgPtr->msgWidth = thisWidth;
+ msgPtr->msgHeight = thisHeight;
+ Tk_GeometryRequest(msgPtr->tkwin, maxWidth, height);
+ Tk_SetInternalBorder(msgPtr->tkwin, inset);
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * DisplayMessage --
+ *
+ * This procedure redraws the contents of a message window.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Information appears on the screen.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+DisplayMessage(clientData)
+ ClientData clientData; /* Information about window. */
+{
+ register Message *msgPtr = (Message *) clientData;
+ register Tk_Window tkwin = msgPtr->tkwin;
+ int x, y;
+
+ msgPtr->flags &= ~REDRAW_PENDING;
+ if ((msgPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+ return;
+ }
+ Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin), msgPtr->border, 0, 0,
+ Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
+
+ /*
+ * Compute starting y-location for message based on message size
+ * and anchor option.
+ */
+
+ TkComputeAnchor(msgPtr->anchor, tkwin, msgPtr->padX, msgPtr->padY,
+ msgPtr->msgWidth, msgPtr->msgHeight, &x, &y);
+ Tk_DrawTextLayout(Tk_Display(tkwin), Tk_WindowId(tkwin), msgPtr->textGC,
+ msgPtr->textLayout, x, y, 0, -1);
+
+ if (msgPtr->relief != TK_RELIEF_FLAT) {
+ Tk_Draw3DRectangle(tkwin, Tk_WindowId(tkwin), msgPtr->border,
+ msgPtr->highlightWidth, msgPtr->highlightWidth,
+ Tk_Width(tkwin) - 2*msgPtr->highlightWidth,
+ Tk_Height(tkwin) - 2*msgPtr->highlightWidth,
+ msgPtr->borderWidth, msgPtr->relief);
+ }
+ if (msgPtr->highlightWidth != 0) {
+ GC gc;
+
+ if (msgPtr->flags & GOT_FOCUS) {
+ gc = Tk_GCForColor(msgPtr->highlightColorPtr, Tk_WindowId(tkwin));
+ } else {
+ gc = Tk_GCForColor(msgPtr->highlightBgColorPtr, Tk_WindowId(tkwin));
+ }
+ Tk_DrawFocusHighlight(tkwin, gc, msgPtr->highlightWidth,
+ Tk_WindowId(tkwin));
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MessageEventProc --
+ *
+ * This procedure is invoked by the Tk dispatcher for various
+ * events on messages.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * When the window gets deleted, internal structures get
+ * cleaned up. When it gets exposed, it is redisplayed.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+MessageEventProc(clientData, eventPtr)
+ ClientData clientData; /* Information about window. */
+ XEvent *eventPtr; /* Information about event. */
+{
+ Message *msgPtr = (Message *) clientData;
+
+ if (((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0))
+ || (eventPtr->type == ConfigureNotify)) {
+ goto redraw;
+ } else if (eventPtr->type == DestroyNotify) {
+ if (msgPtr->tkwin != NULL) {
+ msgPtr->tkwin = NULL;
+ Tcl_DeleteCommandFromToken(msgPtr->interp, msgPtr->widgetCmd);
+ }
+ if (msgPtr->flags & REDRAW_PENDING) {
+ Tcl_CancelIdleCall(DisplayMessage, (ClientData) msgPtr);
+ }
+ Tcl_EventuallyFree((ClientData) msgPtr, DestroyMessage);
+ } else if (eventPtr->type == FocusIn) {
+ if (eventPtr->xfocus.detail != NotifyInferior) {
+ msgPtr->flags |= GOT_FOCUS;
+ if (msgPtr->highlightWidth > 0) {
+ goto redraw;
+ }
+ }
+ } else if (eventPtr->type == FocusOut) {
+ if (eventPtr->xfocus.detail != NotifyInferior) {
+ msgPtr->flags &= ~GOT_FOCUS;
+ if (msgPtr->highlightWidth > 0) {
+ goto redraw;
+ }
+ }
+ }
+ return;
+
+ redraw:
+ if ((msgPtr->tkwin != NULL) && !(msgPtr->flags & REDRAW_PENDING)) {
+ Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
+ msgPtr->flags |= REDRAW_PENDING;
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * MessageCmdDeletedProc --
+ *
+ * This procedure is invoked when a widget command is deleted. If
+ * the widget isn't already in the process of being destroyed,
+ * this command destroys it.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The widget is destroyed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+MessageCmdDeletedProc(clientData)
+ ClientData clientData; /* Pointer to widget record for widget. */
+{
+ Message *msgPtr = (Message *) clientData;
+ Tk_Window tkwin = msgPtr->tkwin;
+
+ /*
+ * This procedure could be invoked either because the window was
+ * destroyed and the command was then deleted (in which case tkwin
+ * is NULL) or because the command was deleted, and then this procedure
+ * destroys the widget.
+ */
+
+ if (tkwin != NULL) {
+ msgPtr->tkwin = NULL;
+ Tk_DestroyWindow(tkwin);
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MessageTextVarProc --
+ *
+ * This procedure is invoked when someone changes the variable
+ * whose contents are to be displayed in a message.
+ *
+ * Results:
+ * NULL is always returned.
+ *
+ * Side effects:
+ * The text displayed in the message will change to match the
+ * variable.
+ *
+ *--------------------------------------------------------------
+ */
+
+ /* ARGSUSED */
+static char *
+MessageTextVarProc(clientData, interp, name1, name2, flags)
+ ClientData clientData; /* Information about message. */
+ 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 Message *msgPtr = (Message *) 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_SetVar(interp, msgPtr->textVarName, msgPtr->string,
+ TCL_GLOBAL_ONLY);
+ Tcl_TraceVar(interp, msgPtr->textVarName,
+ TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+ MessageTextVarProc, clientData);
+ }
+ return (char *) NULL;
+ }
+
+ value = Tcl_GetVar(interp, msgPtr->textVarName, TCL_GLOBAL_ONLY);
+ if (value == NULL) {
+ value = "";
+ }
+ if (msgPtr->string != NULL) {
+ ckfree(msgPtr->string);
+ }
+ msgPtr->numChars = strlen(value);
+ msgPtr->string = (char *) ckalloc((unsigned) (msgPtr->numChars + 1));
+ strcpy(msgPtr->string, value);
+ ComputeMessageGeometry(msgPtr);
+
+ if ((msgPtr->tkwin != NULL) && Tk_IsMapped(msgPtr->tkwin)
+ && !(msgPtr->flags & REDRAW_PENDING)) {
+ Tcl_DoWhenIdle(DisplayMessage, (ClientData) msgPtr);
+ msgPtr->flags |= REDRAW_PENDING;
+ }
+ return (char *) NULL;
+}