--- /dev/null
+
+/*
+ * 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) 1994-1995 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: @(#) tkScrollbar.c 1.79 96/02/15 18:52:40
+ */
+
+#include "bltInt.h"
+
+#ifndef NO_TILESCROLLBAR
+
+#include "bltTile.h"
+
+extern Tk_CustomOption bltTileOption;
+
+#define NORMAL_BG "#d9d9d9"
+#define ACTIVE_BG "#ececec"
+#define SELECT_BG "#c3c3c3"
+#define TROUGH "#c3c3c3"
+#define INDICATOR "#b03060"
+#define DISABLED "#a3a3a3"
+
+/*
+ * Defaults for scrollbars:
+ */
+#define DEF_SCROLLBAR_ACTIVE_BACKGROUND ACTIVE_BG
+#define DEF_SCROLLBAR_ACTIVE_BG_MONO RGB_BLACK
+#define DEF_SCROLLBAR_ACTIVE_RELIEF "raised"
+#define DEF_SCROLLBAR_BACKGROUND NORMAL_BG
+#define DEF_SCROLLBAR_BG_MONO RGB_WHITE
+#define DEF_SCROLLBAR_BORDERWIDTH "2"
+#define DEF_SCROLLBAR_COMMAND ""
+#define DEF_SCROLLBAR_CURSOR ""
+#define DEF_SCROLLBAR_EL_BORDERWIDTH "-1"
+#define DEF_SCROLLBAR_HIGHLIGHT_BG NORMAL_BG
+#define DEF_SCROLLBAR_HIGHLIGHT RGB_BLACK
+#define DEF_SCROLLBAR_HIGHLIGHT_WIDTH "2"
+#define DEF_SCROLLBAR_JUMP "0"
+#define DEF_SCROLLBAR_ORIENT "vertical"
+#define DEF_SCROLLBAR_RELIEF "sunken"
+#define DEF_SCROLLBAR_REPEAT_DELAY "300"
+#define DEF_SCROLLBAR_REPEAT_INTERVAL "100"
+#define DEF_SCROLLBAR_TAKE_FOCUS (char *)NULL
+#define DEF_SCROLLBAR_TROUGH_COLOR TROUGH
+#define DEF_SCROLLBAR_TROUGH_MONO RGB_WHITE
+#define DEF_SCROLLBAR_WIDTH "15"
+
+
+/*
+ * A data structure of the following type is kept for each scrollbar
+ * widget managed by this file:
+ */
+
+typedef struct {
+ Tk_Window tkwin; /* Window that embodies the scrollbar. 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 scrollbar. */
+ Tcl_Command widgetCmd; /* Token for scrollbar's widget command. */
+ Tk_Uid orientUid; /* Orientation for window ("vertical" or
+ * "horizontal"). */
+ int vertical; /* Non-zero means vertical orientation
+ * requested, zero means horizontal. */
+ int width; /* Desired narrow dimension of scrollbar,
+ * in pixels. */
+ char *command; /* Command prefix to use when invoking
+ * scrolling commands. NULL means don't
+ * invoke commands. Malloc'ed. */
+ int commandSize; /* Number of non-NULL bytes in command. */
+ int repeatDelay; /* How long to wait before auto-repeating
+ * on scrolling actions (in ms). */
+ int repeatInterval; /* Interval between autorepeats (in ms). */
+ int jump; /* Value of -jump option. */
+
+ /*
+ * Information used when displaying widget:
+ */
+
+ int borderWidth; /* Width of 3-D borders. */
+ Tk_3DBorder bgBorder; /* Used for drawing background (all flat
+ * surfaces except for trough). */
+ Tk_3DBorder activeBorder; /* For drawing backgrounds when active (i.e.
+ * when mouse is positioned over element). */
+ XColor *troughColorPtr; /* Color for drawing trough. */
+ GC troughGC; /* For drawing trough. */
+ GC copyGC; /* Used for copying from pixmap onto screen. */
+ int relief; /* Indicates whether window as a whole is
+ * raised, sunken, or flat. */
+ 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 inset; /* Total width of all borders, including
+ * traversal highlight and 3-D border.
+ * Indicates how much interior stuff must
+ * be offset from outside edges to leave
+ * room for borders. */
+ int elementBorderWidth; /* Width of border to draw around elements
+ * inside scrollbar (arrows and slider).
+ * -1 means use borderWidth. */
+ int arrowLength; /* Length of arrows along long dimension of
+ * scrollbar, including space for a small gap
+ * between the arrow and the slider.
+ * Recomputed on window size changes. */
+ int sliderFirst; /* Pixel coordinate of top or left edge
+ * of slider area, including border. */
+ int sliderLast; /* Coordinate of pixel just after bottom
+ * or right edge of slider area, including
+ * border. */
+ int activeField; /* Names field to be displayed in active
+ * colors, such as TOP_ARROW, or 0 for
+ * no field. */
+ int activeRelief; /* Value of -activeRelief option: relief
+ * to use for active element. */
+
+ /*
+ * Information describing the application related to the scrollbar.
+ * This information is provided by the application by invoking the
+ * "set" widget command. This information can now be provided in
+ * two ways: the "old" form (totalUnits, windowUnits, firstUnit,
+ * and lastUnit), or the "new" form (firstFraction and lastFraction).
+ * FirstFraction and lastFraction will always be valid, but
+ * the old-style information is only valid if the NEW_STYLE_COMMANDS
+ * flag is 0.
+ */
+
+ int totalUnits; /* Total dimension of application, in
+ * units. Valid only if the NEW_STYLE_COMMANDS
+ * flag isn't set. */
+ int windowUnits; /* Maximum number of units that can be
+ * displayed in the window at once. Valid
+ * only if the NEW_STYLE_COMMANDS flag isn't
+ * set. */
+ int firstUnit; /* Number of last unit visible in
+ * application's window. Valid only if the
+ * NEW_STYLE_COMMANDS flag isn't set. */
+ int lastUnit; /* Index of last unit visible in window.
+ * Valid only if the NEW_STYLE_COMMANDS
+ * flag isn't set. */
+ double firstFraction; /* Position of first visible thing in window,
+ * specified as a fraction between 0 and
+ * 1.0. */
+ double lastFraction; /* Position of last visible thing in window,
+ * specified as a fraction between 0 and
+ * 1.0. */
+
+ /*
+ * 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. */
+ Blt_Tile tile, tile2, activeTile;
+ char *imagePtr;
+ Tk_Image image;
+} Scrollbar;
+
+/*
+ * Legal values for "activeField" field of Scrollbar structures. These
+ * are also the return values from the ScrollbarPosition procedure.
+ */
+
+#define OUTSIDE 0
+#define TOP_ARROW 1
+#define TOP_GAP 2
+#define SLIDER 3
+#define BOTTOM_GAP 4
+#define BOTTOM_ARROW 5
+
+/*
+ * Flag bits for scrollbars:
+ *
+ * REDRAW_PENDING: Non-zero means a DoWhenIdle handler
+ * has already been queued to redraw
+ * this window.
+ * NEW_STYLE_COMMANDS: Non-zero means the new style of commands
+ * should be used to communicate with the
+ * widget: ".t yview scroll 2 lines", instead
+ * of ".t yview 40", for example.
+ * GOT_FOCUS: Non-zero means this window has the input
+ * focus.
+ */
+
+#define REDRAW_PENDING 1
+#define NEW_STYLE_COMMANDS 2
+#define GOT_FOCUS 4
+#define SCROLLBAR_LAYOUT 8
+
+/*
+ * Minimum slider length, in pixels (designed to make sure that the slider
+ * is always easy to grab with the mouse).
+ */
+
+#define MIN_SLIDER_LENGTH 8
+
+/*
+ * Information used for argv parsing.
+ */
+
+static Tk_ConfigSpec configSpecs[] =
+{
+ {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+ DEF_SCROLLBAR_ACTIVE_BACKGROUND, Tk_Offset(Scrollbar, activeBorder),
+ TK_CONFIG_COLOR_ONLY},
+ {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+ DEF_SCROLLBAR_ACTIVE_BG_MONO, Tk_Offset(Scrollbar, activeBorder),
+ TK_CONFIG_MONO_ONLY},
+ {TK_CONFIG_RELIEF, "-activerelief", "activeRelief", "Relief",
+ DEF_SCROLLBAR_ACTIVE_RELIEF, Tk_Offset(Scrollbar, activeRelief), 0},
+ {TK_CONFIG_CUSTOM, "-activetile", "activeTile", "Tile",
+ (char *)NULL, Tk_Offset(Scrollbar, activeTile), TK_CONFIG_NULL_OK,
+ &bltTileOption},
+ {TK_CONFIG_BORDER, "-background", "background", "Background",
+ DEF_SCROLLBAR_BACKGROUND, Tk_Offset(Scrollbar, bgBorder),
+ TK_CONFIG_COLOR_ONLY},
+ {TK_CONFIG_BORDER, "-background", "background", "Background",
+ DEF_SCROLLBAR_BG_MONO, Tk_Offset(Scrollbar, 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_BORDERWIDTH, Tk_Offset(Scrollbar, borderWidth), 0},
+ {TK_CONFIG_STRING, "-command", "command", "Command",
+ DEF_SCROLLBAR_COMMAND, Tk_Offset(Scrollbar, command),
+ TK_CONFIG_NULL_OK},
+ {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
+ DEF_SCROLLBAR_CURSOR, Tk_Offset(Scrollbar, cursor), TK_CONFIG_NULL_OK},
+ {TK_CONFIG_PIXELS, "-elementborderwidth", "elementBorderWidth",
+ "BorderWidth", DEF_SCROLLBAR_EL_BORDERWIDTH,
+ Tk_Offset(Scrollbar, elementBorderWidth), 0},
+ {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
+ "HighlightBackground", DEF_SCROLLBAR_HIGHLIGHT_BG,
+ Tk_Offset(Scrollbar, highlightBgColorPtr), 0},
+ {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
+ DEF_SCROLLBAR_HIGHLIGHT,
+ Tk_Offset(Scrollbar, highlightColorPtr), 0},
+ {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+ "HighlightThickness",
+ DEF_SCROLLBAR_HIGHLIGHT_WIDTH, Tk_Offset(Scrollbar, highlightWidth), 0},
+ {TK_CONFIG_STRING, "-image", "image", "Image",
+ NULL, Tk_Offset(Scrollbar, imagePtr), 0},
+ {TK_CONFIG_BOOLEAN, "-jump", "jump", "Jump",
+ DEF_SCROLLBAR_JUMP, Tk_Offset(Scrollbar, jump), 0},
+ {TK_CONFIG_UID, "-orient", "orient", "Orient",
+ DEF_SCROLLBAR_ORIENT, Tk_Offset(Scrollbar, orientUid), 0},
+ {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+ DEF_SCROLLBAR_RELIEF, Tk_Offset(Scrollbar, relief), 0},
+ {TK_CONFIG_INT, "-repeatdelay", "repeatDelay", "RepeatDelay",
+ DEF_SCROLLBAR_REPEAT_DELAY, Tk_Offset(Scrollbar, repeatDelay), 0},
+ {TK_CONFIG_INT, "-repeatinterval", "repeatInterval", "RepeatInterval",
+ DEF_SCROLLBAR_REPEAT_INTERVAL, Tk_Offset(Scrollbar, repeatInterval), 0},
+ {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+ DEF_SCROLLBAR_TAKE_FOCUS, Tk_Offset(Scrollbar, takeFocus),
+ TK_CONFIG_NULL_OK},
+ {TK_CONFIG_CUSTOM, "-tile", "tile", "Tile",
+ (char *)NULL, Tk_Offset(Scrollbar, tile), TK_CONFIG_NULL_OK,
+ &bltTileOption},
+ {TK_CONFIG_CUSTOM, "-tile2", "tile2", "Tile2",
+ (char *)NULL, Tk_Offset(Scrollbar, tile2), TK_CONFIG_NULL_OK,
+ &bltTileOption},
+ {TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
+ DEF_SCROLLBAR_TROUGH_COLOR, Tk_Offset(Scrollbar, troughColorPtr),
+ TK_CONFIG_COLOR_ONLY},
+ {TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
+ DEF_SCROLLBAR_TROUGH_MONO, Tk_Offset(Scrollbar, troughColorPtr),
+ TK_CONFIG_MONO_ONLY},
+ {TK_CONFIG_PIXELS, "-width", "width", "Width",
+ DEF_SCROLLBAR_WIDTH, Tk_Offset(Scrollbar, 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 ComputeScrollbarGeometry _ANSI_ARGS_((
+ Scrollbar *scrollPtr));
+static int ConfigureScrollbar _ANSI_ARGS_((Tcl_Interp *interp,
+ Scrollbar *scrollPtr, int argc, char **argv,
+ int flags));
+static void DestroyScrollbar _ANSI_ARGS_((DestroyData *memPtr));
+static void DisplayScrollbar _ANSI_ARGS_((ClientData clientData));
+static void EventuallyRedraw _ANSI_ARGS_((Scrollbar *scrollPtr));
+static void ScrollbarCmdDeletedProc _ANSI_ARGS_((
+ ClientData clientData));
+static void ScrollbarEventProc _ANSI_ARGS_((ClientData clientData,
+ XEvent *eventPtr));
+static int ScrollbarPosition _ANSI_ARGS_((Scrollbar *scrollPtr,
+ int x, int y));
+static int ScrollbarWidgetCmd _ANSI_ARGS_((ClientData clientData,
+ Tcl_Interp *, int argc, char **argv));
+
+static void widgetWorldChanged(ClientData clientData);
+
+static Tk_ClassProcs scrollClass = {
+ sizeof(Tk_ClassProcs), /* size */
+ widgetWorldChanged, /* worldChangedProc */
+};
+
+
+static void
+widgetWorldChanged(ClientData clientData)
+{
+ Scrollbar *scrollPtr = (Scrollbar *)clientData;
+ scrollPtr->flags |= (SCROLLBAR_LAYOUT);
+
+ EventuallyRedraw(scrollPtr);
+}
+
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * 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.
+ *
+ *--------------------------------------------------------------
+ */
+
+/*ARGSUSED*/
+static int
+scrollbarCmd(clientData, interp, argc, argv, stype)
+ ClientData clientData; /* Main window associated with
+ * interpreter. */
+ Tcl_Interp *interp; /* Current interpreter. */
+ int argc; /* Number of arguments. */
+ char **argv; /* Argument strings. */
+ int stype;
+{
+ register Scrollbar *scrollPtr;
+ Tk_Window tkwin;
+
+ if (argc < 2) {
+ Tcl_AppendResult(interp, "wrong # args: should be \"",
+ argv[0], " pathName ?options?\"", (char *)NULL);
+ return TCL_ERROR;
+ }
+ tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), argv[1],
+ (char *)NULL);
+ if (tkwin == NULL) {
+ return TCL_ERROR;
+ }
+ /*
+ * Initialize fields that won't be initialized by ConfigureScrollbar,
+ * or which ConfigureScrollbar expects to have reasonable values
+ * (e.g. resource pointers).
+ */
+
+ scrollPtr = Blt_Calloc(1, sizeof(Scrollbar));
+ scrollPtr->tkwin = tkwin;
+ scrollPtr->display = Tk_Display(tkwin);
+ scrollPtr->interp = interp;
+ scrollPtr->widgetCmd = Tcl_CreateCommand(interp,
+ Tk_PathName(scrollPtr->tkwin), ScrollbarWidgetCmd,
+ (ClientData)scrollPtr, ScrollbarCmdDeletedProc);
+#ifdef ITCL_NAMESPACES
+ Itk_SetWidgetCommand(scrollPtr->tkwin, scrollPtr->widgetCmd);
+#endif /* ITCL_NAMESPACES */
+ scrollPtr->orientUid = NULL;
+ 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->troughGC = None;
+ scrollPtr->copyGC = None;
+ 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;
+ scrollPtr->tile = scrollPtr->tile2 = scrollPtr->activeTile = NULL;
+
+ if (stype) {
+ Tk_SetClass(scrollPtr->tkwin, "BScrollbar");
+ } else {
+ Tk_SetClass(scrollPtr->tkwin, "Scrollbar");
+ }
+ Tk_SetClassProcs(tkwin, &scrollClass, (ClientData)scrollPtr);
+ Tk_CreateEventHandler(scrollPtr->tkwin,
+ ExposureMask | StructureNotifyMask | FocusChangeMask,
+ ScrollbarEventProc, (ClientData)scrollPtr);
+ if (ConfigureScrollbar(interp, scrollPtr, argc - 2, argv + 2, 0) != TCL_OK) {
+ goto error;
+ }
+ Tcl_SetResult(interp, Tk_PathName(scrollPtr->tkwin), TCL_VOLATILE);
+ return TCL_OK;
+
+ error:
+ Tk_DestroyWindow(scrollPtr->tkwin);
+ return TCL_ERROR;
+}
+
+static int
+BScrollbarCmd(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 scrollbarCmd(clientData, interp, argc, argv, 1);
+}
+
+static int
+ScrollbarCmd(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 scrollbarCmd(clientData, interp, argc, argv, 0);
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * 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. */
+ char **argv; /* Argument strings. */
+{
+ register Scrollbar *scrollPtr = clientData;
+ char string[200];
+ 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)) {
+ 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]);
+ 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;
+ }
+ EventuallyRedraw(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, configSpecs,
+ (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, configSpecs,
+ (char *)scrollPtr, (char *)NULL, 0);
+ } else if (argc == 3) {
+ result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, configSpecs,
+ (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, barWidth;
+ double fraction;
+
+ 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;
+ barWidth = Tk_Height(scrollPtr->tkwin) - 1
+ - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
+ } else {
+ pixels = xDelta;
+ barWidth = Tk_Width(scrollPtr->tkwin) - 1
+ - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
+ }
+ if (barWidth == 0) {
+ fraction = 0.0;
+ } else {
+ fraction = ((double)pixels / (double)barWidth);
+ }
+ sprintf(interp->result, "%g", fraction);
+ } else if ((c == 'f') && (strncmp(argv[1], "fraction", length) == 0)) {
+ int x, y, pos, barWidth;
+ double fraction;
+
+ 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);
+ barWidth = Tk_Height(scrollPtr->tkwin) - 1
+ - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
+ } else {
+ pos = x - (scrollPtr->arrowLength + scrollPtr->inset);
+ barWidth = Tk_Width(scrollPtr->tkwin) - 1
+ - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
+ }
+ if (barWidth == 0) {
+ fraction = 0.0;
+ } else {
+ fraction = ((double)pos / (double)barWidth);
+ }
+ if (fraction < 0) {
+ fraction = 0;
+ } else if (fraction > 1.0) {
+ fraction = 1.0;
+ }
+ sprintf(string, "%g", fraction);
+ Tcl_SetResult(interp, string, 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 {
+ sprintf(string, "%d %d %d %d", scrollPtr->totalUnits,
+ scrollPtr->windowUnits, scrollPtr->firstUnit,
+ scrollPtr->lastUnit);
+ Tcl_SetResult(interp, string, 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 = ScrollbarPosition(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;
+ }
+ ComputeScrollbarGeometry(scrollPtr);
+ EventuallyRedraw(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;
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyScrollbar --
+ *
+ * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
+ * to clean up the internal structure of a scrollbar at a safe time
+ * (when no-one is using it anymore).
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Everything associated with the scrollbar is freed up.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DestroyScrollbar(memPtr)
+ DestroyData *memPtr; /* Info about scrollbar widget. */
+{
+ register Scrollbar *scrollPtr = (Scrollbar *)memPtr;
+
+ /*
+ * Free up all the stuff that requires special handling, then
+ * let Tk_FreeOptions handle all the standard option-related
+ * stuff.
+ */
+
+ if (scrollPtr->troughGC != None) {
+ Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
+ }
+ if (scrollPtr->copyGC != None) {
+ Tk_FreeGC(scrollPtr->display, scrollPtr->copyGC);
+ }
+ if (scrollPtr->activeTile != NULL) {
+ Blt_FreeTile(scrollPtr->activeTile);
+ }
+ if (scrollPtr->tile != NULL) {
+ Blt_FreeTile(scrollPtr->tile);
+ }
+ if (scrollPtr->tile2 != NULL) {
+ Blt_FreeTile(scrollPtr->tile2);
+ }
+ if (scrollPtr->image != NULL) {
+ Tk_FreeImage(scrollPtr->image);
+ }
+ Tk_FreeOptions(configSpecs, (char *)scrollPtr, scrollPtr->display, 0);
+ Blt_Free(scrollPtr);
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * TileChangedProc
+ *
+ * Routine for tile change notifications.
+ *
+ * Results:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+/*ARGSUSED*/
+static void
+TileChangedProc(clientData, tile)
+ ClientData clientData;
+ Blt_Tile tile; /* Not used. */
+{
+ Scrollbar *scrollPtr = clientData;
+
+ if (scrollPtr->tkwin != NULL) {
+ EventuallyRedraw(scrollPtr);
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ScrollbarImageProc --
+ *
+ * This function is invoked by the image code whenever the manager for an
+ * image does something that affects the size or contents of an image
+ * displayed in a button.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Arranges for the button to get redisplayed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+ScrollbarImageProc(
+ ClientData clientData, /* Pointer to widget record. */
+ int x, int y, /* Upper left pixel (within image) that must
+ * be redisplayed. */
+ int width, int height, /* Dimensions of area to redisplay (might be
+ * <= 0). */
+ int imgWidth, int imgHeight)/* New dimensions of image. */
+{
+ register Scrollbar *scrollPtr = (Scrollbar *) clientData;
+
+ if (scrollPtr->tkwin != NULL) {
+ ComputeScrollbarGeometry(scrollPtr);
+ if (Tk_IsMapped(scrollPtr->tkwin) && !(scrollPtr->flags & REDRAW_PENDING)) {
+ Tcl_DoWhenIdle(DisplayScrollbar, (ClientData) scrollPtr);
+ scrollPtr->flags |= REDRAW_PENDING;
+ }
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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 interp->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 Scrollbar *scrollPtr; /* 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. */
+{
+ size_t length;
+ XGCValues gcValues;
+ GC new;
+ Tk_Image image;
+
+ if (Tk_ConfigureWidget(interp, scrollPtr->tkwin, configSpecs,
+ argc, argv, (char *)scrollPtr, flags) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ /*
+ * A few options need special processing, such as parsing the
+ * orientation or setting the background from a 3-D border.
+ */
+
+ length = strlen(scrollPtr->orientUid);
+ if (strncmp(scrollPtr->orientUid, "vertical", length) == 0) {
+ scrollPtr->vertical = 1;
+ } else if (strncmp(scrollPtr->orientUid, "horizontal", length) == 0) {
+ scrollPtr->vertical = 0;
+ } else {
+ Tcl_AppendResult(interp, "bad orientation \"", scrollPtr->orientUid,
+ "\": must be vertical or horizontal", (char *)NULL);
+ return TCL_ERROR;
+ }
+
+ if (scrollPtr->command != NULL) {
+ scrollPtr->commandSize = strlen(scrollPtr->command);
+ } else {
+ scrollPtr->commandSize = 0;
+ }
+
+ /* Get the images for the widget, if there are any. Allocate the new
+ * images before freeing the old ones, so that the reference counts
+ * don't go to zero and cause image data to be discarded.
+ */
+
+ if (scrollPtr->imagePtr != NULL) {
+ image = Tk_GetImage(scrollPtr->interp, scrollPtr->tkwin,
+ scrollPtr->imagePtr, ScrollbarImageProc,
+ (ClientData) scrollPtr);
+ } else {
+ image = NULL;
+ }
+ if (scrollPtr->image != NULL) {
+ Tk_FreeImage(scrollPtr->image);
+ }
+ scrollPtr->image = image;
+
+ if (scrollPtr->activeTile != NULL) {
+ Blt_SetTileChangedProc(scrollPtr->activeTile, TileChangedProc,
+ (ClientData)scrollPtr);
+ }
+ if (scrollPtr->tile != NULL) {
+ Blt_SetTileChangedProc(scrollPtr->tile, TileChangedProc,
+ (ClientData)scrollPtr);
+ }
+ if (scrollPtr->tile2 != NULL) {
+ Blt_SetTileChangedProc(scrollPtr->tile2, TileChangedProc,
+ (ClientData)scrollPtr);
+ }
+ Tk_SetBackgroundFromBorder(scrollPtr->tkwin, scrollPtr->bgBorder);
+
+ gcValues.foreground = scrollPtr->troughColorPtr->pixel;
+ new = Tk_GetGC(scrollPtr->tkwin, GCForeground, &gcValues);
+ if (scrollPtr->troughGC != None) {
+ Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
+ }
+ scrollPtr->troughGC = new;
+ if (scrollPtr->copyGC == None) {
+ gcValues.graphics_exposures = False;
+ scrollPtr->copyGC = Tk_GetGC(scrollPtr->tkwin, GCGraphicsExposures,
+ &gcValues);
+ }
+ /*
+ * 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.
+ */
+
+ ComputeScrollbarGeometry(scrollPtr);
+ EventuallyRedraw(scrollPtr);
+ return TCL_OK;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * DisplayScrollbar --
+ *
+ * This procedure redraws the contents of a scrollbar window.
+ * It is invoked as a do-when-idle handler, so it only runs
+ * when there's nothing else for the application to do.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Information appears on the screen.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+DisplayScrollbar(clientData)
+ ClientData clientData; /* Information about window. */
+{
+ register Scrollbar *scrollPtr = clientData;
+ register Tk_Window tkwin = scrollPtr->tkwin;
+ XPoint points[7];
+ Tk_3DBorder border;
+ int relief, width, elementBorderWidth;
+ Pixmap pixmap;
+ Blt_Tile tile, tiletr, tilecur;
+
+ tiletr = (Blt_HasTile(scrollPtr->tile) ? scrollPtr->tile : NULL);
+ tile = (Blt_HasTile(scrollPtr->tile2) ? scrollPtr->tile2 : tiletr);
+ if ((scrollPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+ goto done;
+ }
+ if (scrollPtr->vertical) {
+ width = Tk_Width(tkwin) - 2 * scrollPtr->inset;
+ } else {
+ width = Tk_Height(tkwin) - 2 * scrollPtr->inset;
+ }
+ elementBorderWidth = scrollPtr->elementBorderWidth;
+ if (elementBorderWidth < 0) {
+ elementBorderWidth = scrollPtr->borderWidth;
+ }
+
+ /*
+ * In order to avoid screen flashes, this procedure redraws
+ * the scrollbar 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 = Tk_GetPixmap(scrollPtr->display, Tk_WindowId(tkwin),
+ Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
+
+ if (scrollPtr->highlightWidth != 0) {
+ GC gc;
+
+ if (scrollPtr->flags & GOT_FOCUS) {
+ gc = Tk_GCForColor(scrollPtr->highlightColorPtr, pixmap);
+ } else {
+ gc = Tk_GCForColor(scrollPtr->highlightBgColorPtr, pixmap);
+ }
+ Tk_DrawFocusHighlight(tkwin, gc, scrollPtr->highlightWidth, pixmap);
+ }
+ Blt_Draw3DRectangle(tkwin, pixmap, scrollPtr->bgBorder,
+ scrollPtr->highlightWidth, scrollPtr->highlightWidth,
+ Tk_Width(tkwin) - 2 * scrollPtr->highlightWidth,
+ Tk_Height(tkwin) - 2 * scrollPtr->highlightWidth,
+ scrollPtr->borderWidth, scrollPtr->relief);
+
+ if (tiletr != NULL) {
+ Blt_SetTileOrigin(tkwin, tiletr, 0, 0);
+ Blt_TileRectangle(tkwin, pixmap, tiletr, scrollPtr->inset,
+ scrollPtr->inset,
+ (unsigned)(Tk_Width(tkwin) - 2 * scrollPtr->inset),
+ (unsigned)(Tk_Height(tkwin) - 2 * scrollPtr->inset));
+ } else {
+ XFillRectangle(scrollPtr->display, pixmap, scrollPtr->troughGC,
+ scrollPtr->inset, scrollPtr->inset,
+ (unsigned)(Tk_Width(tkwin) - 2 * scrollPtr->inset),
+ (unsigned)(Tk_Height(tkwin) - 2 * scrollPtr->inset));
+ }
+
+ /*
+ * Draw the top or left arrow. The coordinates of the polygon
+ * points probably seem odd, but they were carefully chosen with
+ * respect to X's rules for filling polygons. These point choices
+ * cause the arrows to just fill the narrow dimension of the
+ * scrollbar and be properly centered.
+ */
+ tilecur = tile;
+ if (scrollPtr->activeField == TOP_ARROW) {
+ border = scrollPtr->activeBorder;
+ relief = scrollPtr->activeField == TOP_ARROW ? scrollPtr->activeRelief
+ : TK_RELIEF_RAISED;
+ if (Blt_HasTile(scrollPtr->activeTile)) {
+ Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
+ tilecur = scrollPtr->activeTile;
+ }
+ } else {
+ border = scrollPtr->bgBorder;
+ relief = TK_RELIEF_RAISED;
+ }
+#ifdef notdef
+ if (scrollPtr->vertical) {
+ points[0].x = scrollPtr->inset - 1;
+ points[0].y = scrollPtr->arrowLength + scrollPtr->inset - 1;
+ points[1].x = width + scrollPtr->inset;
+ points[1].y = points[0].y;
+ points[2].x = width / 2 + scrollPtr->inset;
+ points[2].y = scrollPtr->inset - 1;
+ } else {
+ points[0].x = scrollPtr->arrowLength + scrollPtr->inset - 1;
+ points[0].y = scrollPtr->inset - 1;
+ points[1].x = scrollPtr->inset;
+ points[1].y = width / 2 + scrollPtr->inset;
+ points[2].x = points[0].x;
+ points[2].y = width + scrollPtr->inset;
+ }
+ if (tilecur != NULL) {
+ Blt_TilePolygon(tkwin, pixmap, tilecur, points, 3);
+ Tk_Draw3DPolygon(tkwin, pixmap, border, points, 3,
+ elementBorderWidth, relief);
+ } else {
+ Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
+ elementBorderWidth, relief);
+ }
+#else
+ Blt_Fill3DRectangleTile(tkwin, pixmap, border, scrollPtr->inset,
+ scrollPtr->inset, width, width, elementBorderWidth, relief, tilecur, 0, 0);
+
+ Blt_DrawArrow(scrollPtr->display, pixmap, scrollPtr->copyGC,
+ scrollPtr->inset + width / 2,
+ scrollPtr->inset + width / 2,
+ STD_ARROW_HEIGHT,
+ (scrollPtr->vertical) ? ARROW_UP : ARROW_LEFT);
+#endif
+ /*
+ * Display the bottom or right arrow.
+ */
+ tilecur = tile;
+ if (scrollPtr->activeField == BOTTOM_ARROW) {
+ border = scrollPtr->activeBorder;
+ relief = scrollPtr->activeField == BOTTOM_ARROW
+ ? scrollPtr->activeRelief : TK_RELIEF_RAISED;
+ if (Blt_HasTile(scrollPtr->activeTile)) {
+ Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
+ tilecur = scrollPtr->activeTile;
+ }
+ } else {
+ border = scrollPtr->bgBorder;
+ relief = TK_RELIEF_RAISED;
+ }
+#ifdef notdef
+ if (scrollPtr->vertical) {
+ points[0].x = scrollPtr->inset;
+ points[0].y = Tk_Height(tkwin) - scrollPtr->arrowLength
+ - scrollPtr->inset + 1;
+ points[1].x = width / 2 + scrollPtr->inset;
+ points[1].y = Tk_Height(tkwin) - scrollPtr->inset;
+ points[2].x = width + scrollPtr->inset;
+ points[2].y = points[0].y;
+ } else {
+ points[0].x = Tk_Width(tkwin) - scrollPtr->arrowLength
+ - scrollPtr->inset + 1;
+ points[0].y = scrollPtr->inset - 1;
+ points[1].x = points[0].x;
+ points[1].y = width + scrollPtr->inset;
+ points[2].x = Tk_Width(tkwin) - scrollPtr->inset;
+ points[2].y = width / 2 + scrollPtr->inset;
+ }
+ if (tile != NULL) {
+ Blt_TilePolygon(tkwin, pixmap, tile, points, 3);
+ Tk_Draw3DPolygon(tkwin, pixmap, border, points, 3,
+ elementBorderWidth, relief);
+ } else {
+ Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
+ elementBorderWidth, relief);
+ }
+#else
+ Blt_Fill3DRectangleTile(tkwin, pixmap, border,
+ Tk_Width(tkwin) - (width + scrollPtr->inset),
+ Tk_Height(tkwin) - (width + scrollPtr->inset),
+ width, width, elementBorderWidth, relief, tilecur, 0, 0);
+
+ Blt_DrawArrow(scrollPtr->display, pixmap, scrollPtr->copyGC,
+ Tk_Width(tkwin) - (scrollPtr->inset + width / 2) - 1,
+ Tk_Height(tkwin) - (scrollPtr->inset + width / 2) - 1,
+ STD_ARROW_HEIGHT,
+ (scrollPtr->vertical) ? ARROW_DOWN : ARROW_RIGHT);
+#endif
+ /*
+ * Display the slider.
+ */
+ tilecur = tile;
+ if (scrollPtr->activeField == SLIDER) {
+ border = scrollPtr->activeBorder;
+ relief = scrollPtr->activeField == SLIDER ? scrollPtr->activeRelief
+ : TK_RELIEF_RAISED;
+ if (Blt_HasTile(scrollPtr->activeTile)) {
+ Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
+ tilecur = scrollPtr->activeTile;
+ }
+ } else {
+ border = scrollPtr->bgBorder;
+ relief = TK_RELIEF_RAISED;
+ }
+ if (scrollPtr->vertical) {
+ if (tilecur) {
+ Blt_TileRectangle(tkwin, pixmap, tilecur, scrollPtr->inset,
+ scrollPtr->sliderFirst, width - 1,
+ scrollPtr->sliderLast - scrollPtr->sliderFirst - 1);
+ Blt_Draw3DRectangle(tkwin, pixmap, border,
+ scrollPtr->inset, scrollPtr->sliderFirst,
+ width, scrollPtr->sliderLast - scrollPtr->sliderFirst,
+ elementBorderWidth, relief);
+ } else {
+ Blt_Fill3DRectangle(tkwin, pixmap, border,
+ scrollPtr->inset, scrollPtr->sliderFirst,
+ width, scrollPtr->sliderLast - scrollPtr->sliderFirst,
+ elementBorderWidth, relief);
+ }
+ } else {
+ if (tilecur) {
+ Blt_TileRectangle(tkwin, pixmap, tilecur, scrollPtr->sliderFirst,
+ scrollPtr->inset,
+ scrollPtr->sliderLast - scrollPtr->sliderFirst - 1, width - 1);
+ Blt_Draw3DRectangle(tkwin, pixmap, border,
+ scrollPtr->sliderFirst, scrollPtr->inset,
+ scrollPtr->sliderLast - scrollPtr->sliderFirst, width,
+ elementBorderWidth, relief);
+ } else {
+ Blt_Fill3DRectangle(tkwin, pixmap, border,
+ scrollPtr->sliderFirst, scrollPtr->inset,
+ scrollPtr->sliderLast - scrollPtr->sliderFirst, width,
+ elementBorderWidth, relief);
+ }
+ }
+
+ if (scrollPtr->image != NULL) {
+ /* Draw adornment image centered on bar. */
+ int imgW, imgH, xLen, yLen, yStart, xStart, yOfs = 0, xOfs = 0, pad = 1 + scrollPtr->borderWidth;
+
+ Tk_SizeOfImage(scrollPtr->image, &imgW, &imgH);
+
+ if (scrollPtr->vertical) {
+ xLen = width;
+ yLen = scrollPtr->sliderLast - scrollPtr->sliderFirst;
+ } else {
+ yLen = width;
+ xLen = scrollPtr->sliderLast - scrollPtr->sliderFirst;
+
+ }
+ if (imgW > (xLen-pad*2)) {
+ int oWid = imgW;
+ imgW = (xLen-pad*2);
+ xOfs = (oWid-imgW)/2;
+ }
+ if (imgH > (yLen-pad*2)) {
+ int oWid = imgH;
+ imgH = (yLen-pad*2);
+ yOfs = (oWid-imgH)/2;
+ }
+ xStart = (xLen - imgW)/2+pad;
+ yStart = (yLen - imgH)/2+pad;
+ if (scrollPtr->vertical) {
+ yStart += scrollPtr->sliderFirst;
+ } else {
+ xStart += scrollPtr->sliderFirst;
+ }
+ if (xStart>=0 && yStart>=0 && imgW > 0 && imgH > 0) {
+ Tk_RedrawImage(scrollPtr->image, xOfs, yOfs, imgW, imgH, pixmap, xStart, yStart);
+ }
+ }
+
+ /*
+ * Copy the information from the off-screen pixmap onto the screen,
+ * then delete the pixmap.
+ */
+
+ XCopyArea(scrollPtr->display, pixmap, Tk_WindowId(tkwin),
+ scrollPtr->copyGC, 0, 0, (unsigned)Tk_Width(tkwin),
+ (unsigned)Tk_Height(tkwin), 0, 0);
+ Tk_FreePixmap(scrollPtr->display, pixmap);
+
+ done:
+ scrollPtr->flags &= ~REDRAW_PENDING;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarEventProc --
+ *
+ * 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.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+ScrollbarEventProc(clientData, eventPtr)
+ ClientData clientData; /* Information about window. */
+ XEvent *eventPtr; /* Information about event. */
+{
+ Scrollbar *scrollPtr = clientData;
+
+ if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
+ EventuallyRedraw(scrollPtr);
+ } else if (eventPtr->type == DestroyNotify) {
+ if (scrollPtr->tkwin != NULL) {
+ scrollPtr->tkwin = NULL;
+ Tcl_DeleteCommandFromToken(scrollPtr->interp,scrollPtr->widgetCmd);
+ }
+ if (scrollPtr->flags & REDRAW_PENDING) {
+ Tcl_CancelIdleCall(DisplayScrollbar, (ClientData)scrollPtr);
+ }
+ Tcl_EventuallyFree((ClientData)scrollPtr,
+ (Tcl_FreeProc *)DestroyScrollbar);
+ } else if (eventPtr->type == ConfigureNotify) {
+ ComputeScrollbarGeometry(scrollPtr);
+ EventuallyRedraw(scrollPtr);
+ } else if (eventPtr->type == FocusIn) {
+ if (eventPtr->xfocus.detail != NotifyInferior) {
+ scrollPtr->flags |= GOT_FOCUS;
+ if (scrollPtr->highlightWidth > 0) {
+ EventuallyRedraw(scrollPtr);
+ }
+ }
+ } else if (eventPtr->type == FocusOut) {
+ if (eventPtr->xfocus.detail != NotifyInferior) {
+ scrollPtr->flags &= ~GOT_FOCUS;
+ if (scrollPtr->highlightWidth > 0) {
+ EventuallyRedraw(scrollPtr);
+ }
+ }
+ }
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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. */
+{
+ Scrollbar *scrollPtr = 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) {
+#ifdef ITCL_NAMESPACES
+ Itk_SetWidgetCommand(scrollPtr->tkwin, (Tcl_Command) NULL);
+#endif
+ scrollPtr->tkwin = NULL;
+ Tk_DestroyWindow(tkwin);
+ }
+}
+\f
+/*
+ *----------------------------------------------------------------------
+ *
+ * ComputeScrollbarGeometry --
+ *
+ * After changes in a scrollbar's size or configuration, this
+ * procedure recomputes various geometry information used in
+ * displaying the scrollbar.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The scrollbar will be displayed differently.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+ComputeScrollbarGeometry(scrollPtr)
+ register Scrollbar *scrollPtr; /* Scrollbar whose geometry may
+ * have changed. */
+{
+ int width, fieldLength;
+
+ if (scrollPtr->highlightWidth < 0) {
+ scrollPtr->highlightWidth = 0;
+ }
+ scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
+ width = (scrollPtr->vertical) ? Tk_Width(scrollPtr->tkwin)
+ : Tk_Height(scrollPtr->tkwin);
+ scrollPtr->arrowLength = width - 2 * scrollPtr->inset + 1;
+ fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
+ : Tk_Width(scrollPtr->tkwin))
+ - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
+ if (fieldLength < 0) {
+ fieldLength = 0;
+ }
+ scrollPtr->sliderFirst = fieldLength * scrollPtr->firstFraction;
+ scrollPtr->sliderLast = fieldLength * scrollPtr->lastFraction;
+
+ /*
+ * Adjust the slider so that some piece of it is always
+ * displayed in the scrollbar and so that it has at least
+ * a minimal width (so it can be grabbed with the mouse).
+ */
+
+ if (scrollPtr->sliderFirst > (fieldLength - 2 * scrollPtr->borderWidth)) {
+ scrollPtr->sliderFirst = fieldLength - 2 * scrollPtr->borderWidth;
+ }
+ if (scrollPtr->sliderFirst < 0) {
+ scrollPtr->sliderFirst = 0;
+ }
+ if (scrollPtr->sliderLast < (scrollPtr->sliderFirst + MIN_SLIDER_LENGTH)) {
+ scrollPtr->sliderLast = scrollPtr->sliderFirst + MIN_SLIDER_LENGTH;
+ }
+ if (scrollPtr->sliderLast > fieldLength) {
+ scrollPtr->sliderLast = fieldLength;
+ }
+ scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
+ scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
+
+ /*
+ * 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.
+ */
+
+ if (scrollPtr->vertical) {
+ Tk_GeometryRequest(scrollPtr->tkwin,
+ scrollPtr->width + 2 * scrollPtr->inset,
+ 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth
+ + scrollPtr->inset));
+ } else {
+ Tk_GeometryRequest(scrollPtr->tkwin,
+ 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth
+ + scrollPtr->inset), scrollPtr->width + 2 * scrollPtr->inset);
+ }
+ Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * ScrollbarPosition --
+ *
+ * Determine the scrollbar element corresponding to a
+ * given position.
+ *
+ * Results:
+ * One of TOP_ARROW, TOP_GAP, etc., indicating which element
+ * of the scrollbar covers the position given by (x, y). If
+ * (x,y) is outside the scrollbar entirely, then OUTSIDE is
+ * returned.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+static int
+ScrollbarPosition(scrollPtr, x, y)
+ register Scrollbar *scrollPtr; /* Scrollbar widget record. */
+ int x, y; /* Coordinates within scrollPtr's
+ * window. */
+{
+ int length, width, tmp;
+
+ if (scrollPtr->vertical) {
+ length = Tk_Height(scrollPtr->tkwin);
+ width = Tk_Width(scrollPtr->tkwin);
+ } else {
+ tmp = x;
+ x = y;
+ y = tmp;
+ length = Tk_Width(scrollPtr->tkwin);
+ width = Tk_Height(scrollPtr->tkwin);
+ }
+
+ if ((x < scrollPtr->inset) || (x >= (width - scrollPtr->inset))
+ || (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) {
+ return OUTSIDE;
+ }
+ /*
+ * All of the calculations in this procedure mirror those in
+ * DisplayScrollbar. Be sure to keep the two consistent.
+ */
+
+ if (y < (scrollPtr->inset + scrollPtr->arrowLength)) {
+ return TOP_ARROW;
+ }
+ if (y < scrollPtr->sliderFirst) {
+ return TOP_GAP;
+ }
+ if (y < scrollPtr->sliderLast) {
+ return SLIDER;
+ }
+ if (y >= (length - (scrollPtr->arrowLength + scrollPtr->inset))) {
+ return BOTTOM_ARROW;
+ }
+ return BOTTOM_GAP;
+}
+\f
+/*
+ *--------------------------------------------------------------
+ *
+ * EventuallyRedraw --
+ *
+ * Arrange for one or more of the fields of a scrollbar
+ * to be redrawn.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * None.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+EventuallyRedraw(scrollPtr)
+ register Scrollbar *scrollPtr; /* Information about widget. */
+{
+ if ((scrollPtr->tkwin == NULL) || (!Tk_IsMapped(scrollPtr->tkwin))) {
+ return;
+ }
+ if ((scrollPtr->flags & REDRAW_PENDING) == 0) {
+ Tcl_DoWhenIdle(DisplayScrollbar, (ClientData)scrollPtr);
+ scrollPtr->flags |= REDRAW_PENDING;
+ }
+}
+
+int
+Blt_ScrollbarInit(interp)
+ Tcl_Interp *interp;
+{
+ static Blt_CmdSpec cmdSpecs[2] =
+ {
+ { "scrollbar", ScrollbarCmd, },
+ { "bscrollbar", BScrollbarCmd, },
+ };
+
+ return Blt_InitCmds(interp, "blt::tile", cmdSpecs, 2);
+}
+
+#endif /* NO_TILESCROLLBAR */
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