tkScrollbar.c from Gdb at Krugle
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/*
* tkScrollbar.c --
*
* This module implements a scrollbar widgets for the Tk
* toolkit. A scrollbar displays a slider and two arrows;
* mouse clicks on features within the scrollbar cause
* scrolling commands to be invoked.
*
* Copyright (c) 1990-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tkScrollbar.c,v 1.6 2002/08/05 04:30:40 dgp Exp $
*/
#include "tkPort.h"
#include "tkScrollbar.h"
#include "default.h"
/*
* Custom option for handling "-orient"
*/
static Tk_CustomOption orientOption = {
(Tk_OptionParseProc *) TkOrientParseProc,
TkOrientPrintProc,
(ClientData) NULL
};
/*
* Information used for argv parsing.
*/
Tk_ConfigSpec tkpScrollbarConfigSpecs[] = {
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_SCROLLBAR_ACTIVE_BG_COLOR, Tk_Offset(TkScrollbar, activeBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_SCROLLBAR_ACTIVE_BG_MONO, Tk_Offset(TkScrollbar, activeBorder),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_RELIEF, "-activerelief", "activeRelief", "Relief",
DEF_SCROLLBAR_ACTIVE_RELIEF, Tk_Offset(TkScrollbar, activeRelief), 0},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_SCROLLBAR_BG_COLOR, Tk_Offset(TkScrollbar, bgBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_SCROLLBAR_BG_MONO, Tk_Offset(TkScrollbar, bgBorder),
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_SCROLLBAR_BORDER_WIDTH, Tk_Offset(TkScrollbar, borderWidth), 0},
{TK_CONFIG_STRING, "-command", "command", "Command",
DEF_SCROLLBAR_COMMAND, Tk_Offset(TkScrollbar, command),
TK_CONFIG_NULL_OK},
{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
DEF_SCROLLBAR_CURSOR, Tk_Offset(TkScrollbar, cursor), TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-elementborderwidth", "elementBorderWidth",
"BorderWidth", DEF_SCROLLBAR_EL_BORDER_WIDTH,
Tk_Offset(TkScrollbar, elementBorderWidth), 0},
{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
"HighlightBackground", DEF_SCROLLBAR_HIGHLIGHT_BG,
Tk_Offset(TkScrollbar, highlightBgColorPtr), 0},
{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
DEF_SCROLLBAR_HIGHLIGHT,
Tk_Offset(TkScrollbar, highlightColorPtr), 0},
{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
"HighlightThickness",
DEF_SCROLLBAR_HIGHLIGHT_WIDTH, Tk_Offset(TkScrollbar, highlightWidth), 0},
{TK_CONFIG_BOOLEAN, "-jump", "jump", "Jump",
DEF_SCROLLBAR_JUMP, Tk_Offset(TkScrollbar, jump), 0},
{TK_CONFIG_CUSTOM, "-orient", "orient", "Orient",
DEF_SCROLLBAR_ORIENT, Tk_Offset(TkScrollbar, vertical), 0,
&orientOption},
{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
DEF_SCROLLBAR_RELIEF, Tk_Offset(TkScrollbar, relief), 0},
{TK_CONFIG_INT, "-repeatdelay", "repeatDelay", "RepeatDelay",
DEF_SCROLLBAR_REPEAT_DELAY, Tk_Offset(TkScrollbar, repeatDelay), 0},
{TK_CONFIG_INT, "-repeatinterval", "repeatInterval", "RepeatInterval",
DEF_SCROLLBAR_REPEAT_INTERVAL, Tk_Offset(TkScrollbar, repeatInterval), 0},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_SCROLLBAR_TAKE_FOCUS, Tk_Offset(TkScrollbar, takeFocus),
TK_CONFIG_NULL_OK},
{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
DEF_SCROLLBAR_TROUGH_COLOR, Tk_Offset(TkScrollbar, troughColorPtr),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
DEF_SCROLLBAR_TROUGH_MONO, Tk_Offset(TkScrollbar, troughColorPtr),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_PIXELS, "-width", "width", "Width",
DEF_SCROLLBAR_WIDTH, Tk_Offset(TkScrollbar, 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 int ConfigureScrollbar _ANSI_ARGS_((Tcl_Interp *interp,
TkScrollbar *scrollPtr, int argc, CONST char **argv,
int flags));
static void ScrollbarCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static int ScrollbarWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *, int argc, CONST char **argv));
/*
*--------------------------------------------------------------
*
* Tk_ScrollbarCmd --
*
* This procedure is invoked to process the "scrollbar" 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_ScrollbarCmd(clientData, interp, argc, argv)
ClientData clientData; /* Main window associated with
* interpreter. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
CONST char **argv; /* Argument strings. */
{
Tk_Window tkwin = (Tk_Window) clientData;
register TkScrollbar *scrollPtr;
Tk_Window new;
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;
}
Tk_SetClass(new, "Scrollbar");
scrollPtr = TkpCreateScrollbar(new);
Tk_SetClassProcs(new, &tkpScrollbarProcs, (ClientData) scrollPtr);
/*
* Initialize fields that won't be initialized by ConfigureScrollbar,
* or which ConfigureScrollbar expects to have reasonable values
* (e.g. resource pointers).
*/
scrollPtr->tkwin = new;
scrollPtr->display = Tk_Display(new);
scrollPtr->interp = interp;
scrollPtr->widgetCmd = Tcl_CreateCommand(interp,
Tk_PathName(scrollPtr->tkwin), ScrollbarWidgetCmd,
(ClientData) scrollPtr, ScrollbarCmdDeletedProc);
scrollPtr->vertical = 0;
scrollPtr->width = 0;
scrollPtr->command = NULL;
scrollPtr->commandSize = 0;
scrollPtr->repeatDelay = 0;
scrollPtr->repeatInterval = 0;
scrollPtr->borderWidth = 0;
scrollPtr->bgBorder = NULL;
scrollPtr->activeBorder = NULL;
scrollPtr->troughColorPtr = NULL;
scrollPtr->relief = TK_RELIEF_FLAT;
scrollPtr->highlightWidth = 0;
scrollPtr->highlightBgColorPtr = NULL;
scrollPtr->highlightColorPtr = NULL;
scrollPtr->inset = 0;
scrollPtr->elementBorderWidth = -1;
scrollPtr->arrowLength = 0;
scrollPtr->sliderFirst = 0;
scrollPtr->sliderLast = 0;
scrollPtr->activeField = 0;
scrollPtr->activeRelief = TK_RELIEF_RAISED;
scrollPtr->totalUnits = 0;
scrollPtr->windowUnits = 0;
scrollPtr->firstUnit = 0;
scrollPtr->lastUnit = 0;
scrollPtr->firstFraction = 0.0;
scrollPtr->lastFraction = 0.0;
scrollPtr->cursor = None;
scrollPtr->takeFocus = NULL;
scrollPtr->flags = 0;
if (ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2, 0) != TCL_OK) {
Tk_DestroyWindow(scrollPtr->tkwin);
return TCL_ERROR;
}
Tcl_SetResult(interp, Tk_PathName(scrollPtr->tkwin), TCL_STATIC);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* ScrollbarWidgetCmd --
*
* 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
ScrollbarWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about scrollbar
* widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
CONST char **argv; /* Argument strings. */
{
register TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
int result = TCL_OK;
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;
}
Tcl_Preserve((ClientData) scrollPtr);
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)) {
int oldActiveField;
if (argc == 2) {
switch (scrollPtr->activeField) {
case TOP_ARROW:
Tcl_SetResult(interp, "arrow1", TCL_STATIC);
break;
case SLIDER:
Tcl_SetResult(interp, "slider", TCL_STATIC);
break;
case BOTTOM_ARROW:
Tcl_SetResult(interp, "arrow2", TCL_STATIC);
break;
}
goto done;
}
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " activate element\"", (char *) NULL);
goto error;
}
c = argv[2][0];
length = strlen(argv[2]);
oldActiveField = scrollPtr->activeField;
if ((c == 'a') && (strcmp(argv[2], "arrow1") == 0)) {
scrollPtr->activeField = TOP_ARROW;
} else if ((c == 'a') && (strcmp(argv[2], "arrow2") == 0)) {
scrollPtr->activeField = BOTTOM_ARROW;
} else if ((c == 's') && (strncmp(argv[2], "slider", length) == 0)) {
scrollPtr->activeField = SLIDER;
} else {
scrollPtr->activeField = OUTSIDE;
}
if (oldActiveField != scrollPtr->activeField) {
TkScrollbarEventuallyRedraw(scrollPtr);
}
} else 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);
goto error;
}
result = Tk_ConfigureValue(interp, scrollPtr->tkwin,
tkpScrollbarConfigSpecs, (char *) scrollPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin,
tkpScrollbarConfigSpecs, (char *) scrollPtr,
(char *) NULL, 0);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin,
tkpScrollbarConfigSpecs, (char *) scrollPtr, argv[2], 0);
} else {
result = ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else if ((c == 'd') && (strncmp(argv[1], "delta", length) == 0)) {
int xDelta, yDelta, pixels, length;
double fraction;
char buf[TCL_DOUBLE_SPACE];
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " delta xDelta yDelta\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &xDelta) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &yDelta) != TCL_OK)) {
goto error;
}
if (scrollPtr->vertical) {
pixels = yDelta;
length = Tk_Height(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
} else {
pixels = xDelta;
length = Tk_Width(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
}
if (length == 0) {
fraction = 0.0;
} else {
fraction = ((double) pixels / (double) length);
}
sprintf(buf, "%g", fraction);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
} else if ((c == 'f') && (strncmp(argv[1], "fraction", length) == 0)) {
int x, y, pos, length;
double fraction;
char buf[TCL_DOUBLE_SPACE];
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " fraction x y\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
goto error;
}
if (scrollPtr->vertical) {
pos = y - (scrollPtr->arrowLength + scrollPtr->inset);
length = Tk_Height(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
} else {
pos = x - (scrollPtr->arrowLength + scrollPtr->inset);
length = Tk_Width(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
}
if (length == 0) {
fraction = 0.0;
} else {
fraction = ((double) pos / (double) length);
}
if (fraction < 0) {
fraction = 0;
} else if (fraction > 1.0) {
fraction = 1.0;
}
sprintf(buf, "%g", fraction);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " get\"", (char *) NULL);
goto error;
}
if (scrollPtr->flags & NEW_STYLE_COMMANDS) {
char first[TCL_DOUBLE_SPACE], last[TCL_DOUBLE_SPACE];
Tcl_PrintDouble(interp, scrollPtr->firstFraction, first);
Tcl_PrintDouble(interp, scrollPtr->lastFraction, last);
Tcl_AppendResult(interp, first, " ", last, (char *) NULL);
} else {
char buf[TCL_INTEGER_SPACE * 4];
sprintf(buf, "%d %d %d %d", scrollPtr->totalUnits,
scrollPtr->windowUnits, scrollPtr->firstUnit,
scrollPtr->lastUnit);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
}
} else if ((c == 'i') && (strncmp(argv[1], "identify", length) == 0)) {
int x, y, thing;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " identify x y\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
goto error;
}
thing = TkpScrollbarPosition(scrollPtr, x,y);
switch (thing) {
case TOP_ARROW:
Tcl_SetResult(interp, "arrow1", TCL_STATIC);
break;
case TOP_GAP:
Tcl_SetResult(interp, "trough1", TCL_STATIC);
break;
case SLIDER:
Tcl_SetResult(interp, "slider", TCL_STATIC);
break;
case BOTTOM_GAP:
Tcl_SetResult(interp, "trough2", TCL_STATIC);
break;
case BOTTOM_ARROW:
Tcl_SetResult(interp, "arrow2", TCL_STATIC);
break;
}
} else if ((c == 's') && (strncmp(argv[1], "set", length) == 0)) {
int totalUnits, windowUnits, firstUnit, lastUnit;
if (argc == 4) {
double first, last;
if (Tcl_GetDouble(interp, argv[2], &first) != TCL_OK) {
goto error;
}
if (Tcl_GetDouble(interp, argv[3], &last) != TCL_OK) {
goto error;
}
if (first < 0) {
scrollPtr->firstFraction = 0;
} else if (first > 1.0) {
scrollPtr->firstFraction = 1.0;
} else {
scrollPtr->firstFraction = first;
}
if (last < scrollPtr->firstFraction) {
scrollPtr->lastFraction = scrollPtr->firstFraction;
} else if (last > 1.0) {
scrollPtr->lastFraction = 1.0;
} else {
scrollPtr->lastFraction = last;
}
scrollPtr->flags |= NEW_STYLE_COMMANDS;
} else if (argc == 6) {
if (Tcl_GetInt(interp, argv[2], &totalUnits) != TCL_OK) {
goto error;
}
if (totalUnits < 0) {
totalUnits = 0;
}
if (Tcl_GetInt(interp, argv[3], &windowUnits) != TCL_OK) {
goto error;
}
if (windowUnits < 0) {
windowUnits = 0;
}
if (Tcl_GetInt(interp, argv[4], &firstUnit) != TCL_OK) {
goto error;
}
if (Tcl_GetInt(interp, argv[5], &lastUnit) != TCL_OK) {
goto error;
}
if (totalUnits > 0) {
if (lastUnit < firstUnit) {
lastUnit = firstUnit;
}
} else {
firstUnit = lastUnit = 0;
}
scrollPtr->totalUnits = totalUnits;
scrollPtr->windowUnits = windowUnits;
scrollPtr->firstUnit = firstUnit;
scrollPtr->lastUnit = lastUnit;
if (scrollPtr->totalUnits == 0) {
scrollPtr->firstFraction = 0.0;
scrollPtr->lastFraction = 1.0;
} else {
scrollPtr->firstFraction = ((double) firstUnit)/totalUnits;
scrollPtr->lastFraction = ((double) (lastUnit+1))/totalUnits;
}
scrollPtr->flags &= ~NEW_STYLE_COMMANDS;
} else {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " set firstFraction lastFraction\" or \"",
argv[0],
" set totalUnits windowUnits firstUnit lastUnit\"",
(char *) NULL);
goto error;
}
TkpComputeScrollbarGeometry(scrollPtr);
TkScrollbarEventuallyRedraw(scrollPtr);
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be activate, cget, configure, delta, fraction, ",
"get, identify, or set", (char *) NULL);
goto error;
}
done:
Tcl_Release((ClientData) scrollPtr);
return result;
error:
Tcl_Release((ClientData) scrollPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* ConfigureScrollbar --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a scrollbar widget.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is
* returned, then the interp's result contains an error message.
*
* Side effects:
* Configuration information, such as colors, border width,
* etc. get set for scrollPtr; old resources get freed,
* if there were any.
*
*----------------------------------------------------------------------
*/
static int
ConfigureScrollbar(interp, scrollPtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register TkScrollbar *scrollPtr; /* Information about widget; may or
* may not already have values for
* some fields. */
int argc; /* Number of valid entries in argv. */
CONST char **argv; /* Arguments. */
int flags; /* Flags to pass to
* Tk_ConfigureWidget. */
{
if (Tk_ConfigureWidget(interp, scrollPtr->tkwin, tkpScrollbarConfigSpecs,
argc, argv, (char *) scrollPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* A few options need special processing, such as setting the
* background from a 3-D border.
*/
if (scrollPtr->command != NULL) {
scrollPtr->commandSize = strlen(scrollPtr->command);
} else {
scrollPtr->commandSize = 0;
}
/*
* Configure platform specific options.
*/
TkpConfigureScrollbar(scrollPtr);
/*
* Register the desired geometry for the window (leave enough space
* for the two arrows plus a minimum-size slider, plus border around
* the whole window, if any). Then arrange for the window to be
* redisplayed.
*/
TkpComputeScrollbarGeometry(scrollPtr);
TkScrollbarEventuallyRedraw(scrollPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* TkScrollbarEventProc --
*
* This procedure is invoked by the Tk dispatcher for various
* events on scrollbars.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get
* cleaned up. When it gets exposed, it is redisplayed.
*
*--------------------------------------------------------------
*/
void
TkScrollbarEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
XEvent *eventPtr; /* Information about event. */
{
TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
TkScrollbarEventuallyRedraw(scrollPtr);
} else if (eventPtr->type == DestroyNotify) {
TkpDestroyScrollbar(scrollPtr);
if (scrollPtr->tkwin != NULL) {
scrollPtr->tkwin = NULL;
Tcl_DeleteCommandFromToken(scrollPtr->interp,
scrollPtr->widgetCmd);
}
if (scrollPtr->flags & REDRAW_PENDING) {
Tcl_CancelIdleCall(TkpDisplayScrollbar, (ClientData) scrollPtr);
}
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff.
*/
Tk_FreeOptions(tkpScrollbarConfigSpecs, (char *) scrollPtr,
scrollPtr->display, 0);
Tcl_EventuallyFree((ClientData) scrollPtr, TCL_DYNAMIC);
} else if (eventPtr->type == ConfigureNotify) {
TkpComputeScrollbarGeometry(scrollPtr);
TkScrollbarEventuallyRedraw(scrollPtr);
} else if (eventPtr->type == FocusIn) {
if (eventPtr->xfocus.detail != NotifyInferior) {
scrollPtr->flags |= GOT_FOCUS;
if (scrollPtr->highlightWidth > 0) {
TkScrollbarEventuallyRedraw(scrollPtr);
}
}
} else if (eventPtr->type == FocusOut) {
if (eventPtr->xfocus.detail != NotifyInferior) {
scrollPtr->flags &= ~GOT_FOCUS;
if (scrollPtr->highlightWidth > 0) {
TkScrollbarEventuallyRedraw(scrollPtr);
}
}
}
}
/*
*----------------------------------------------------------------------
*
* ScrollbarCmdDeletedProc --
*
* 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
ScrollbarCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
TkScrollbar *scrollPtr = (TkScrollbar *) clientData;
Tk_Window tkwin = scrollPtr->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) {
scrollPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*--------------------------------------------------------------
*
* TkScrollbarEventuallyRedraw --
*
* Arrange for one or more of the fields of a scrollbar
* to be redrawn.
*
* Results:
* None.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
void
TkScrollbarEventuallyRedraw(scrollPtr)
register TkScrollbar *scrollPtr; /* Information about widget. */
{
if ((scrollPtr->tkwin == NULL) || (!Tk_IsMapped(scrollPtr->tkwin))) {
return;
}
if ((scrollPtr->flags & REDRAW_PENDING) == 0) {
Tcl_DoWhenIdle(TkpDisplayScrollbar, (ClientData) scrollPtr);
scrollPtr->flags |= REDRAW_PENDING;
}
}
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