/*
* tkFrame.c --
*
* This module implements "frame" and "toplevel" widgets for
* the Tk toolkit. Frames are windows with a background color
* and possibly a 3-D effect, but not much else in the way of
* attributes.
*
* 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: @(#) tkFrame.c 1.68 96/02/15 18:53:30
*/
#include "tkInt.h"
#include "tkDefault.h"
/*
* A data structure of the following type is kept for each
* frame that currently exists for this process:
*/
typedef struct {
Tk_Window tkwin; /* Window that embodies the frame. 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 widget. Used
* to delete widget command. */
Tcl_Command widgetCmd; /* Token for frame's widget command. */
char *className; /* Class name for widget (from configuration
* option). Malloc-ed. */
int mask; /* Either FRAME or TOPLEVEL; used to select
* which configuration options are valid for
* widget. */
char *screenName; /* Screen on which widget is created. Non-null
* only for top-levels. Malloc-ed, may be
* NULL. */
char *visualName; /* Textual description of visual for window,
* from -visual option. Malloc-ed, may be
* NULL. */
char *colormapName; /* Textual description of colormap for window,
* from -colormap option. Malloc-ed, may be
* NULL. */
Colormap colormap; /* If not None, identifies a colormap
* allocated for this window, which must be
* freed when the window is deleted. */
Tk_3DBorder border; /* Structure used to draw 3-D border and
* background. NULL means no background
* or border. */
int borderWidth; /* Width of 3-D border (if any). */
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. */
int width; /* Width to request for window. <= 0 means
* don't request any size. */
int height; /* Height to request for window. <= 0 means
* don't request any size. */
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. */
} Frame;
/*
* Flag bits for frames:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* GOT_FOCUS: Non-zero means this widget currently
* has the input focus.
*/
#define REDRAW_PENDING 1
#define GOT_FOCUS 4
/*
* The following flag bits are used so that there can be separate
* defaults for some configuration options for frames and toplevels.
*/
#define FRAME TK_CONFIG_USER_BIT
#define TOPLEVEL (TK_CONFIG_USER_BIT << 1)
#define BOTH (FRAME | TOPLEVEL)
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_FRAME_BG_COLOR, Tk_Offset(Frame, border),
BOTH|TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_FRAME_BG_MONO, Tk_Offset(Frame, border),
BOTH|TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
(char *) NULL, 0, BOTH},
{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, BOTH},
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_FRAME_BORDER_WIDTH, Tk_Offset(Frame, borderWidth), BOTH},
{TK_CONFIG_STRING, "-class", "class", "Class",
DEF_FRAME_CLASS, Tk_Offset(Frame, className), FRAME},
{TK_CONFIG_STRING, "-class", "class", "Class",
DEF_TOPLEVEL_CLASS, Tk_Offset(Frame, className), TOPLEVEL},
{TK_CONFIG_STRING, "-colormap", "colormap", "Colormap",
DEF_FRAME_COLORMAP, Tk_Offset(Frame, colormapName),
BOTH|TK_CONFIG_NULL_OK},
{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
DEF_FRAME_CURSOR, Tk_Offset(Frame, cursor), BOTH|TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-height", "height", "Height",
DEF_FRAME_HEIGHT, Tk_Offset(Frame, height), BOTH},
{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
"HighlightBackground", DEF_FRAME_HIGHLIGHT_BG,
Tk_Offset(Frame, highlightBgColorPtr), BOTH},
{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
DEF_FRAME_HIGHLIGHT, Tk_Offset(Frame, highlightColorPtr), BOTH},
{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
"HighlightThickness",
DEF_FRAME_HIGHLIGHT_WIDTH, Tk_Offset(Frame, highlightWidth), BOTH},
{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
DEF_FRAME_RELIEF, Tk_Offset(Frame, relief), BOTH},
{TK_CONFIG_STRING, "-screen", "screen", "Screen",
DEF_TOPLEVEL_SCREEN, Tk_Offset(Frame, screenName),
TOPLEVEL|TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_FRAME_TAKE_FOCUS, Tk_Offset(Frame, takeFocus),
BOTH|TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-visual", "visual", "Visual",
DEF_FRAME_VISUAL, Tk_Offset(Frame, visualName),
BOTH|TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-width", "width", "Width",
DEF_FRAME_WIDTH, Tk_Offset(Frame, width), BOTH},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Forward declarations for procedures defined later in this file:
*/
static int ConfigureFrame _ANSI_ARGS_((Tcl_Interp *interp,
Frame *framePtr, int argc, char **argv,
int flags));
static void DestroyFrame _ANSI_ARGS_((char *memPtr));
static void DisplayFrame _ANSI_ARGS_((ClientData clientData));
static void FrameCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void FrameEventProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static int FrameWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
static void MapFrame _ANSI_ARGS_((ClientData clientData));
/*
*--------------------------------------------------------------
*
* Tk_FrameCmd, Tk_ToplevelCmd --
*
* These procedures are invoked to process the "frame" and
* "toplevel" Tcl commands. See the user documentation for
* details on what they do.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation. These procedures are just wrappers;
* they call ButtonCreate to do all of the real work.
*
*--------------------------------------------------------------
*/
int
Tk_FrameCmd(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. */
{
return TkCreateFrame(clientData, interp, argc, argv, 0, (char *) NULL);
}
int
Tk_ToplevelCmd(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. */
{
return TkCreateFrame(clientData, interp, argc, argv, 1, (char *) NULL);
}
/*
*--------------------------------------------------------------
*
* TkFrameCreate --
*
* This procedure is invoked to process the "frame" and "toplevel"
* Tcl commands; it is also invoked directly by Tk_Init to create
* a new main window. See the user documentation for the "frame"
* and "toplevel" commands for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
int
TkCreateFrame(clientData, interp, argc, argv, toplevel, appName)
ClientData clientData; /* Main window associated with interpreter.
* If we're called by Tk_Init to create a
* new application, then this is NULL. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
int toplevel; /* Non-zero means create a toplevel window,
* zero means create a frame. */
char *appName; /* Should only be non-NULL if clientData is
* NULL: gives the base name to use for the
* new application. */
{
Tk_Window tkwin = (Tk_Window) clientData;
Frame *framePtr;
Tk_Window new = NULL;
char *className, *screenName, *visualName, *colormapName, *arg;
int i, c, length, depth;
Colormap colormap;
Visual *visual;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
/*
* Pre-process the argument list. Scan through it to find any
* "-class", "-screen", "-visual", and "-colormap" options. These
* arguments need to be processed specially, before the window
* is configured using the usual Tk mechanisms.
*/
className = colormapName = screenName = visualName = NULL;
colormap = None;
for (i = 2; i < argc; i += 2) {
arg = argv[i];
length = strlen(arg);
if (length < 2) {
continue;
}
c = arg[1];
if ((c == 'c') && (strncmp(arg, "-class", strlen(arg)) == 0)
&& (length >= 3)) {
className = argv[i+1];
} else if ((c == 'c')
&& (strncmp(arg, "-colormap", strlen(arg)) == 0)) {
colormapName = argv[i+1];
} else if ((c == 's') && toplevel
&& (strncmp(arg, "-screen", strlen(arg)) == 0)) {
screenName = argv[i+1];
} else if ((c == 'v')
&& (strncmp(arg, "-visual", strlen(arg)) == 0)) {
visualName = argv[i+1];
}
}
/*
* Create the window, and deal with the special options -classname,
* -colormap, -screenname, and -visual. The order here is tricky,
* because we want to allow values for these options to come from
* the database, yet we can't do that until the window is created.
*/
if (screenName == NULL) {
screenName = (toplevel) ? "" : NULL;
}
if (tkwin != NULL) {
new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], screenName);
} else {
/*
* We were called from Tk_Init; create a new application.
*/
if (appName == NULL) {
panic("TkCreateFrame didn't get application name");
}
new = TkCreateMainWindow(interp, screenName, appName);
}
if (new == NULL) {
goto error;
}
if (className == NULL) {
className = Tk_GetOption(new, "class", "Class");
if (className == NULL) {
className = (toplevel) ? "Toplevel" : "Frame";
}
}
Tk_SetClass(new, className);
if (visualName == NULL) {
visualName = Tk_GetOption(new, "visual", "Visual");
}
if (colormapName == NULL) {
colormapName = Tk_GetOption(new, "colormap", "Colormap");
}
if (visualName != NULL) {
visual = Tk_GetVisual(interp, new, visualName, &depth,
(colormapName == NULL) ? &colormap : (Colormap *) NULL);
if (visual == NULL) {
goto error;
}
Tk_SetWindowVisual(new, visual, depth, colormap);
}
if (colormapName != NULL) {
colormap = Tk_GetColormap(interp, new, colormapName);
if (colormap == None) {
goto error;
}
Tk_SetWindowColormap(new, colormap);
}
/*
* For top-level windows, provide an initial geometry request of
* 200x200, just so the window looks nicer on the screen if it
* doesn't request a size for itself.
*/
if (toplevel) {
Tk_GeometryRequest(new, 200, 200);
}
/*
* Create the widget record, process configuration options, and
* create event handlers. Then fill in a few additional fields
* in the widget record from the special options.
*/
framePtr = (Frame *) ckalloc(sizeof(Frame));
framePtr->tkwin = new;
framePtr->display = Tk_Display(new);
framePtr->interp = interp;
framePtr->widgetCmd = Tcl_CreateCommand(interp,
Tk_PathName(new), FrameWidgetCmd,
(ClientData) framePtr, FrameCmdDeletedProc);
framePtr->className = NULL;
framePtr->mask = (toplevel) ? TOPLEVEL : FRAME;
framePtr->screenName = NULL;
framePtr->visualName = NULL;
framePtr->colormapName = NULL;
framePtr->colormap = colormap;
framePtr->border = NULL;
framePtr->borderWidth = 0;
framePtr->relief = TK_RELIEF_FLAT;
framePtr->highlightWidth = 0;
framePtr->highlightBgColorPtr = NULL;
framePtr->highlightColorPtr = NULL;
framePtr->width = 0;
framePtr->height = 0;
framePtr->cursor = None;
framePtr->takeFocus = NULL;
framePtr->flags = 0;
Tk_CreateEventHandler(new, ExposureMask|StructureNotifyMask|FocusChangeMask,
FrameEventProc, (ClientData) framePtr);
if (ConfigureFrame(interp, framePtr, argc-2, argv+2, 0) != TCL_OK) {
goto error;
}
if (toplevel) {
Tcl_DoWhenIdle(MapFrame, (ClientData) framePtr);
}
interp->result = Tk_PathName(new);
return TCL_OK;
error:
if (new != NULL) {
Tk_DestroyWindow(new);
}
return TCL_ERROR;
}
/*
*--------------------------------------------------------------
*
* FrameWidgetCmd --
*
* This procedure is invoked to process the Tcl command
* that corresponds to a frame widget. See the user
* documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
static int
FrameWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about frame widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register Frame *framePtr = (Frame *) clientData;
int result = TCL_OK;
size_t length;
int c, i;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Tcl_Preserve((ClientData) framePtr);
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);
result = TCL_ERROR;
goto done;
}
result = Tk_ConfigureValue(interp, framePtr->tkwin, configSpecs,
(char *) framePtr, argv[2], framePtr->mask);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, framePtr->tkwin, configSpecs,
(char *) framePtr, (char *) NULL, framePtr->mask);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, framePtr->tkwin, configSpecs,
(char *) framePtr, argv[2], framePtr->mask);
} else {
/*
* Don't allow the options -class, -newcmap, -screen,
* or -visual to be changed.
*/
for (i = 2; i < argc; i++) {
length = strlen(argv[i]);
if (length < 2) {
continue;
}
c = argv[i][1];
if (((c == 'c') && (strncmp(argv[i], "-class", length) == 0)
&& (length >= 2))
|| ((c == 'c') && (framePtr->mask == TOPLEVEL)
&& (strncmp(argv[i], "-colormap", length) == 0))
|| ((c == 's') && (framePtr->mask == TOPLEVEL)
&& (strncmp(argv[i], "-screen", length) == 0))
|| ((c == 'v') && (framePtr->mask == TOPLEVEL)
&& (strncmp(argv[i], "-visual", length) == 0))) {
Tcl_AppendResult(interp, "can't modify ", argv[i],
" option after widget is created", (char *) NULL);
result = TCL_ERROR;
goto done;
}
}
result = ConfigureFrame(interp, framePtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be cget or configure", (char *) NULL);
result = TCL_ERROR;
}
done:
Tcl_Release((ClientData) framePtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* DestroyFrame --
*
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
* to clean up the internal structure of a frame at a safe time
* (when no-one is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the frame is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyFrame(memPtr)
char *memPtr; /* Info about frame widget. */
{
register Frame *framePtr = (Frame *) memPtr;
Tk_FreeOptions(configSpecs, (char *) framePtr, framePtr->display,
framePtr->mask);
if (framePtr->colormap != None) {
Tk_FreeColormap(framePtr->display, framePtr->colormap);
}
ckfree((char *) framePtr);
}
/*
*----------------------------------------------------------------------
*
* ConfigureFrame --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a frame 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 framePtr; old resources get freed, if there
* were any.
*
*----------------------------------------------------------------------
*/
static int
ConfigureFrame(interp, framePtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register Frame *framePtr; /* 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. */
{
if (Tk_ConfigureWidget(interp, framePtr->tkwin, configSpecs,
argc, argv, (char *) framePtr, flags | framePtr->mask) != TCL_OK) {
return TCL_ERROR;
}
if (framePtr->border != NULL) {
Tk_SetBackgroundFromBorder(framePtr->tkwin, framePtr->border);
}
if (framePtr->highlightWidth < 0) {
framePtr->highlightWidth = 0;
}
Tk_SetInternalBorder(framePtr->tkwin,
framePtr->borderWidth + framePtr->highlightWidth);
if ((framePtr->width > 0) || (framePtr->height > 0)) {
Tk_GeometryRequest(framePtr->tkwin, framePtr->width,
framePtr->height);
}
if (Tk_IsMapped(framePtr->tkwin)) {
if (!(framePtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayFrame, (ClientData) framePtr);
}
framePtr->flags |= REDRAW_PENDING;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* DisplayFrame --
*
* This procedure is invoked to display a frame widget.
*
* Results:
* None.
*
* Side effects:
* Commands are output to X to display the frame in its
* current mode.
*
*----------------------------------------------------------------------
*/
static void
DisplayFrame(clientData)
ClientData clientData; /* Information about widget. */
{
register Frame *framePtr = (Frame *) clientData;
register Tk_Window tkwin = framePtr->tkwin;
GC gc;
framePtr->flags &= ~REDRAW_PENDING;
if ((framePtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
return;
}
if (framePtr->border != NULL) {
Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin),
framePtr->border, framePtr->highlightWidth,
framePtr->highlightWidth,
Tk_Width(tkwin) - 2*framePtr->highlightWidth,
Tk_Height(tkwin) - 2*framePtr->highlightWidth,
framePtr->borderWidth, framePtr->relief);
}
if (framePtr->highlightWidth != 0) {
if (framePtr->flags & GOT_FOCUS) {
gc = Tk_GCForColor(framePtr->highlightColorPtr,
Tk_WindowId(tkwin));
} else {
gc = Tk_GCForColor(framePtr->highlightBgColorPtr,
Tk_WindowId(tkwin));
}
Tk_DrawFocusHighlight(tkwin, gc, framePtr->highlightWidth,
Tk_WindowId(tkwin));
}
}
/*
*--------------------------------------------------------------
*
* FrameEventProc --
*
* This procedure is invoked by the Tk dispatcher on
* structure changes to a frame. For frames with 3D
* borders, this procedure is also invoked for exposures.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get
* cleaned up. When it gets exposed, it is redisplayed.
*
*--------------------------------------------------------------
*/
static void
FrameEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
register XEvent *eventPtr; /* Information about event. */
{
register Frame *framePtr = (Frame *) clientData;
if (((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0))
|| (eventPtr->type == ConfigureNotify)) {
goto redraw;
} else if (eventPtr->type == DestroyNotify) {
if (framePtr->tkwin != NULL) {
framePtr->tkwin = NULL;
Tcl_DeleteCommand(framePtr->interp,
Tcl_GetCommandName(framePtr->interp, framePtr->widgetCmd));
}
if (framePtr->flags & REDRAW_PENDING) {
Tcl_CancelIdleCall(DisplayFrame, (ClientData) framePtr);
}
Tcl_CancelIdleCall(MapFrame, (ClientData) framePtr);
Tcl_EventuallyFree((ClientData) framePtr, DestroyFrame);
} else if (eventPtr->type == FocusIn) {
if (eventPtr->xfocus.detail != NotifyInferior) {
framePtr->flags |= GOT_FOCUS;
if (framePtr->highlightWidth > 0) {
goto redraw;
}
}
} else if (eventPtr->type == FocusOut) {
if (eventPtr->xfocus.detail != NotifyInferior) {
framePtr->flags &= ~GOT_FOCUS;
if (framePtr->highlightWidth > 0) {
goto redraw;
}
}
}
return;
redraw:
if ((framePtr->tkwin != NULL) && !(framePtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayFrame, (ClientData) framePtr);
framePtr->flags |= REDRAW_PENDING;
}
}
/*
*----------------------------------------------------------------------
*
* FrameCmdDeletedProc --
*
* 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
FrameCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
Frame *framePtr = (Frame *) clientData;
Tk_Window tkwin = framePtr->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) {
framePtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*----------------------------------------------------------------------
*
* MapFrame --
*
* This procedure is invoked as a when-idle handler to map a
* newly-created top-level frame.
*
* Results:
* None.
*
* Side effects:
* The frame given by the clientData argument is mapped.
*
*----------------------------------------------------------------------
*/
static void
MapFrame(clientData)
ClientData clientData; /* Pointer to frame structure. */
{
Frame *framePtr = (Frame *) clientData;
/*
* Wait for all other background events to be processed before
* mapping window. This ensures that the window's correct geometry
* will have been determined before it is first mapped, so that the
* window manager doesn't get a false idea of its desired geometry.
*/
Tcl_Preserve((ClientData) framePtr);
while (1) {
if (Tcl_DoOneEvent(TCL_IDLE_EVENTS) == 0) {
break;
}
/*
* After each event, make sure that the window still exists
* and quit if the window has been destroyed.
*/
if (framePtr->tkwin == NULL) {
Tcl_Release((ClientData) framePtr);
return;
}
}
Tk_MapWindow(framePtr->tkwin);
Tcl_Release((ClientData) framePtr);
}