* doc/ttk_Geometry.3, doc/ttk_Theme.3, doc/ttk_button.n:

	* doc/ttk_checkbutton.n, doc/ttk_combobox.n, doc/ttk_dialog.n:
	* doc/ttk_entry.n, doc/ttk_frame.n, doc/ttk_image.n:
	* doc/ttk_intro.n, doc/ttk_label.n, doc/ttk_labelframe.n:
	* doc/ttk_menubutton.n, doc/ttk_notebook.n, doc/ttk_panedwindow.n:
	* doc/ttk_progressbar.n, doc/ttk_radiobutton.n, doc/ttk_scrollbar.n:
	* doc/ttk_separator.n, doc/ttk_sizegrip.n, doc/ttk_style.n:
	* doc/ttk_treeview.n, doc/ttk_widget.n,:
	* generic/ttk/ttk.decls, generic/ttk/ttkBlink.c:
	* generic/ttk/ttkButton.c, generic/ttk/ttkCache.c:
	* generic/ttk/ttkClamTheme.c, generic/ttk/ttkClassicTheme.c:
	* generic/ttk/ttkDecls.h, generic/ttk/ttkDefaultTheme.c:
	* generic/ttk/ttkElements.c, generic/ttk/ttkEntry.c:
	* generic/ttk/ttkFrame.c, generic/ttk/ttkImage.c:
	* generic/ttk/ttkInit.c, generic/ttk/ttkLabel.c:
	* generic/ttk/ttkLayout.c, generic/ttk/ttkManager.c:
	* generic/ttk/ttkManager.h, generic/ttk/ttkNotebook.c:
	* generic/ttk/ttkPanedwindow.c, generic/ttk/ttkProgress.c:
	* generic/ttk/ttkScale.c, generic/ttk/ttkScroll.c:
	* generic/ttk/ttkScrollbar.c, generic/ttk/ttkSeparator.c:
	* generic/ttk/ttkSquare.c, generic/ttk/ttkState.c:
	* generic/ttk/ttkStubInit.c, generic/ttk/ttkStubLib.c:
	* generic/ttk/ttkTagSet.c, generic/ttk/ttkTheme.c:
	* generic/ttk/ttkTheme.h, generic/ttk/ttkThemeInt.h:
	* generic/ttk/ttkTrace.c, generic/ttk/ttkTrack.c:
	* generic/ttk/ttkTreeview.c, generic/ttk/ttkWidget.c:
	* generic/ttk/ttkWidget.h:
	* library/demos/ttk_demo.tcl, library/demos/ttk_iconlib.tcl:
	* library/demos/ttk_repeater.tcl:
	* library/ttk/altTheme.tcl, library/ttk/aquaTheme.tcl:
	* library/ttk/button.tcl, library/ttk/clamTheme.tcl:
	* library/ttk/classicTheme.tcl, library/ttk/combobox.tcl:
	* library/ttk/cursors.tcl, library/ttk/defaults.tcl:
	* library/ttk/dialog.tcl, library/ttk/entry.tcl:
	* library/ttk/fonts.tcl, library/ttk/icons.tcl:
	* library/ttk/keynav.tcl, library/ttk/menubutton.tcl:
	* library/ttk/notebook.tcl, library/ttk/panedwindow.tcl:
	* library/ttk/progress.tcl, library/ttk/scale.tcl:
	* library/ttk/scrollbar.tcl, library/ttk/sizegrip.tcl:
	* library/ttk/treeview.tcl, library/ttk/ttk.tcl:
	* library/ttk/utils.tcl, library/ttk/winTheme.tcl:
	* library/ttk/xpTheme.tcl:
	* macosx/ttkMacOSXTheme.c:
	* tests/ttk/all.tcl, tests/ttk/bwidget.test, tests/ttk/combobox.test:
	* tests/ttk/entry.test, tests/ttk/image.test:
	* tests/ttk/labelframe.test, tests/ttk/layout.test:
	* tests/ttk/misc.test, tests/ttk/notebook.test:
	* tests/ttk/panedwindow.test, tests/ttk/progressbar.test:
	* tests/ttk/scrollbar.test, tests/ttk/treetags.test:
	* tests/ttk/treeview.test, tests/ttk/ttk.test, tests/ttk/validate.test:
	* win/ttkWinMonitor.c, win/ttkWinTheme.c, win/ttkWinXPTheme.c:
	First import of Ttk themed Tk widgets as branched from tile 0.7.8

	* generic/tkInt.h, generic/tkWindow.c: add Ttk_Init call, copy
	tk classic widgets to ::tk namespace.
	* library/tk.tcl: add source of ttk/ttk.tcl, define $::ttk::library.
	* unix/Makefile.in, win/Makefile.in: add Ttk build bits
	* win/configure, win/configure.in: check for uxtheme.h (XP theme).

1 files changed, 1264 insertions, 0 deletions

diff --git a/generic/ttk/ttkNotebook.c b/generic/ttk/ttkNotebook.c
new file mode 100644
index 0000000..e8b6640
--- /dev/null
+++ b/generic/ttk/ttkNotebook.c
@@ -0,0 +1,1264 @@
+/* $Id: ttkNotebook.c,v 1.1 2006/10/31 01:42:26 hobbs Exp $
+ * Copyright (c) 2004, Joe English
+ *
+ * NOTE-ACTIVE: activeTabIndex is not always correct (it's
+ * more trouble than it's worth to track this 100%)
+ */
+
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <tk.h>
+
+#include "ttkTheme.h"
+#include "ttkWidget.h"
+#include "ttkManager.h"
+
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+
+/*------------------------------------------------------------------------
+ * +++ Tab resources.
+ */
+
+#define DEFAULT_MIN_TAB_WIDTH 24
+
+static const char *TabStateStrings[] = { "normal", "disabled", "hidden", 0 };
+typedef enum {
+    TAB_STATE_NORMAL, TAB_STATE_DISABLED, TAB_STATE_HIDDEN
+} TAB_STATE;
+
+typedef struct
+{
+    /* Internal data:
+     */
+    int 	width, height;		/* Requested size of tab */
+    Ttk_Box	parcel;			/* Tab position */
+
+    /* Tab options:
+     */
+    TAB_STATE 	state;
+
+    /* Child window options:
+     */
+    Tcl_Obj	*paddingObj;		/* Padding inside pane */
+    Ttk_Padding	padding;
+    Tcl_Obj 	*stickyObj;
+    Ttk_Sticky	sticky;
+
+    /* Label options:
+     */
+    Tcl_Obj *textObj;
+    Tcl_Obj *imageObj;
+    Tcl_Obj *compoundObj;
+    Tcl_Obj *underlineObj;
+
+} Tab;
+
+/* Two different option tables are used for tabs:
+ * TabOptionSpecs is used to draw the tab, and only includes resources
+ * relevant to the tab.
+ *
+ * PaneOptionSpecs includes additional options for child window placement
+ * and is used to configure the slave.
+ */
+static Tk_OptionSpec TabOptionSpecs[] =
+{
+    {TK_OPTION_STRING_TABLE, "-state", "", "",
+	"normal", -1,Tk_Offset(Tab,state),
+	0,(ClientData)TabStateStrings,0 },
+    {TK_OPTION_STRING, "-text", "text", "Text", "",
+	Tk_Offset(Tab,textObj), -1, 0,0,GEOMETRY_CHANGED },
+    {TK_OPTION_STRING, "-image", "image", "Image", NULL/*default*/,
+	Tk_Offset(Tab,imageObj), -1, TK_OPTION_NULL_OK,0,GEOMETRY_CHANGED },
+    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
+	"none", Tk_Offset(Tab,compoundObj), -1,
+	0,(ClientData)TTKCompoundStrings,GEOMETRY_CHANGED },
+    {TK_OPTION_INT, "-underline", "underline", "Underline", "-1",
+	Tk_Offset(Tab,underlineObj), -1, 0,0,GEOMETRY_CHANGED },
+    {TK_OPTION_END}
+};
+
+static Tk_OptionSpec PaneOptionSpecs[] =
+{
+    {TK_OPTION_STRING, "-padding", "padding", "Padding", "0",
+	Tk_Offset(Tab,paddingObj), -1, 0,0,GEOMETRY_CHANGED },
+    {TK_OPTION_STRING, "-sticky", "sticky", "Sticky", "nsew",
+	Tk_Offset(Tab,stickyObj), -1, 0,0,GEOMETRY_CHANGED },
+
+    WIDGET_INHERIT_OPTIONS(TabOptionSpecs)
+};
+
+/*------------------------------------------------------------------------
+ * +++ Notebook resources.
+ */
+typedef struct
+{
+    Tcl_Obj *widthObj;		/* Default width */
+    Tcl_Obj *heightObj;		/* Default height */
+    Tcl_Obj *paddingObj;	/* Padding around notebook */
+
+    Ttk_Manager *mgr;		/* Geometry manager */
+    Tk_OptionTable tabOptionTable;	/* Tab options */
+    Tk_OptionTable paneOptionTable;	/* Tab+pane options */
+    int currentIndex;		/* index of currently selected tab */
+    int activeIndex;		/* index of currently active tab */
+    Ttk_Layout tabLayout;	/* Sublayout for tabs */
+
+    Ttk_Box clientArea;		/* Where to pack slave widgets */
+} NotebookPart;
+
+typedef struct
+{
+    WidgetCore core;
+    NotebookPart notebook;
+} Notebook;
+
+static Tk_OptionSpec NotebookOptionSpecs[] =
+{
+    WIDGET_TAKES_FOCUS,
+
+    {TK_OPTION_INT, "-width", "width", "Width", "0",
+	Tk_Offset(Notebook,notebook.widthObj),-1,
+	0,0,GEOMETRY_CHANGED },
+    {TK_OPTION_INT, "-height", "height", "Height", "0",
+	Tk_Offset(Notebook,notebook.heightObj),-1,
+	0,0,GEOMETRY_CHANGED },
+    {TK_OPTION_STRING, "-padding", "padding", "Padding", NULL,
+	Tk_Offset(Notebook,notebook.paddingObj),-1,
+	TK_OPTION_NULL_OK,0,GEOMETRY_CHANGED },
+
+    WIDGET_INHERIT_OPTIONS(CoreOptionSpecs)
+};
+
+/* Notebook style options:
+ */
+typedef struct
+{
+    Ttk_PositionSpec	tabPosition;	/* Where to place tabs */
+    Ttk_Padding 	tabMargins;	/* Margins around tab row */
+    Ttk_PositionSpec 	tabPlacement;	/* How to pack tabs within tab row */
+    Ttk_Orient		tabOrient;	/* ... */
+    int 		minTabWidth;	/* Minimum tab width */
+    Ttk_Padding 	padding;	/* External padding */
+} NotebookStyle;
+
+static void NotebookStyleOptions(Notebook *nb, NotebookStyle *nbstyle)
+{
+    Tcl_Obj *objPtr;
+
+    nbstyle->tabPosition = TTK_PACK_TOP | TTK_STICK_W;
+    if ((objPtr = Ttk_QueryOption(nb->core.layout, "-tabposition", 0)) != 0) {
+	TtkGetLabelAnchorFromObj(NULL, objPtr, &nbstyle->tabPosition);
+    }
+
+    /* compute tabPlacement and tabOrient as function of tabPosition:
+     */
+    if (nbstyle->tabPosition & TTK_PACK_LEFT) {
+	nbstyle->tabPlacement = TTK_PACK_TOP | TTK_STICK_E;
+	nbstyle->tabOrient = TTK_ORIENT_VERTICAL;
+    } else if (nbstyle->tabPosition & TTK_PACK_RIGHT) {
+	nbstyle->tabPlacement = TTK_PACK_TOP | TTK_STICK_W;
+	nbstyle->tabOrient = TTK_ORIENT_VERTICAL;
+    } else if (nbstyle->tabPosition & TTK_PACK_BOTTOM) {
+	nbstyle->tabPlacement = TTK_PACK_LEFT | TTK_STICK_N;
+	nbstyle->tabOrient = TTK_ORIENT_HORIZONTAL;
+    } else { /* Assume TTK_PACK_TOP */
+	nbstyle->tabPlacement = TTK_PACK_LEFT | TTK_STICK_S;
+	nbstyle->tabOrient = TTK_ORIENT_HORIZONTAL;
+    }
+
+    nbstyle->tabMargins = Ttk_UniformPadding(0);
+    if ((objPtr = Ttk_QueryOption(nb->core.layout, "-tabmargins", 0)) != 0) {
+	Ttk_GetBorderFromObj(NULL, objPtr, &nbstyle->tabMargins);
+    }
+
+    nbstyle->padding = Ttk_UniformPadding(0);
+    if ((objPtr = Ttk_QueryOption(nb->core.layout, "-padding", 0)) != 0) {
+	Ttk_GetPaddingFromObj(NULL,nb->core.tkwin,objPtr,&nbstyle->padding);
+    }
+
+    nbstyle->minTabWidth = DEFAULT_MIN_TAB_WIDTH;
+    if ((objPtr = Ttk_QueryOption(nb->core.layout, "-mintabwidth", 0)) != 0) {
+	Tcl_GetIntFromObj(NULL, objPtr, &nbstyle->minTabWidth);
+    }
+}
+
+/*------------------------------------------------------------------------
+ * +++ Tab management.
+ */
+
+/*
+ * IdentifyTab --
+ * 	Return the index of the tab at point x,y,
+ * 	or -1 if no tab at that point.
+ */
+static int IdentifyTab(Notebook *nb, int x, int y)
+{
+    int index;
+    for (index = 0; index < Ttk_NumberSlaves(nb->notebook.mgr); ++index) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr,index);
+	if (	tab->state != TAB_STATE_HIDDEN
+	     && Ttk_BoxContains(tab->parcel, x,y))
+	{
+	    return index;
+	}
+    }
+    return -1;
+}
+
+/*
+ * ActivateTab --
+ * 	Set the active tab index, redisplay if necessary.
+ */
+static void ActivateTab(Notebook *nb, int index)
+{
+    if (index != nb->notebook.activeIndex) {
+	nb->notebook.activeIndex = index;
+	TtkRedisplayWidget(&nb->core);
+    }
+}
+
+/*
+ * TabState --
+ * 	Return the state of the specified tab, based on
+ * 	notebook state, currentIndex, activeIndex, and user-specified tab state.
+ *	The USER1 bit is set for the leftmost tab, and USER2
+ * 	is set for the rightmost tab.
+ */
+static Ttk_State TabState(Notebook *nb, int index)
+{
+    Ttk_State state = nb->core.state;
+    Tab *tab = Ttk_SlaveData(nb->notebook.mgr, index);
+
+    if (index == nb->notebook.currentIndex) {
+	state |= TTK_STATE_SELECTED;
+    } else {
+	state &= ~TTK_STATE_FOCUS;
+    }
+
+    if (index == nb->notebook.activeIndex) {
+	state |= TTK_STATE_ACTIVE;
+    }
+    if (index == 0) {
+    	state |= TTK_STATE_USER1;
+    }
+    if (index == Ttk_NumberSlaves(nb->notebook.mgr) - 1) {
+    	state |= TTK_STATE_USER2;
+    }
+    if (tab->state == TAB_STATE_DISABLED) {
+	state |= TTK_STATE_DISABLED;
+    }
+
+    return state;
+}
+
+/*------------------------------------------------------------------------
+ * +++ Geometry management - size computation.
+ */
+
+/* TabrowSize --
+ *	Compute max height and total width of all tabs (horizontal layouts)
+ *	or total height and max width (vertical layouts).
+ *
+ * Side effects:
+ * 	Sets width and height fields for all tabs.
+ *
+ * Notes:
+ * 	Hidden tabs are included in the perpendicular computation
+ * 	(max height/width) but not parallel (total width/height).
+ */
+static void TabrowSize(
+    Notebook *nb, Ttk_Orient orient, int *widthPtr, int *heightPtr)
+{
+    Ttk_Layout tabLayout = nb->notebook.tabLayout;
+    int tabrowWidth = 0, tabrowHeight = 0;
+    int i;
+
+    for (i = 0; i < Ttk_NumberSlaves(nb->notebook.mgr); ++i) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, i);
+	Ttk_State tabState = TabState(nb,i);
+
+	Ttk_RebindSublayout(tabLayout, tab);
+	Ttk_LayoutSize(tabLayout,tabState,&tab->width,&tab->height);
+
+	if (orient == TTK_ORIENT_HORIZONTAL) {
+	    tabrowHeight = MAX(tabrowHeight, tab->height);
+	    if (tab->state != TAB_STATE_HIDDEN) { tabrowWidth += tab->width; }
+	} else {
+	    tabrowWidth = MAX(tabrowWidth, tab->width);
+	    if (tab->state != TAB_STATE_HIDDEN) { tabrowHeight += tab->height; }
+	}
+    }
+
+    *widthPtr = tabrowWidth;
+    *heightPtr = tabrowHeight;
+}
+
+/* NotebookSize -- GM and widget size hook.
+ *
+ * Total height is tab height + client area height + pane internal padding
+ * Total width is max(client width, tab width) + pane internal padding
+ * Client area size determined by max size of slaves,
+ * overridden by -width and/or -height if nonzero.
+ */
+
+static int NotebookSize(void *clientData, int *widthPtr, int *heightPtr)
+{
+    Notebook *nb = clientData;
+    NotebookStyle nbstyle;
+    Ttk_Padding padding;
+    Ttk_LayoutNode *clientNode = Ttk_LayoutFindNode(nb->core.layout, "client");
+    int clientWidth = 0, clientHeight = 0,
+    	reqWidth = 0, reqHeight = 0,
+	tabrowWidth = 0, tabrowHeight = 0;
+    int i;
+
+    NotebookStyleOptions(nb, &nbstyle);
+
+    /* Compute max requested size of all slaves:
+     */
+    for (i = 0; i < Ttk_NumberSlaves(nb->notebook.mgr); ++i) {
+	Tk_Window slaveWindow = Ttk_SlaveWindow(nb->notebook.mgr, i);
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, i);
+	int slaveWidth
+	    = Tk_ReqWidth(slaveWindow) + Ttk_PaddingWidth(tab->padding);
+	int slaveHeight
+	    = Tk_ReqHeight(slaveWindow) + Ttk_PaddingHeight(tab->padding);
+
+	clientWidth = MAX(clientWidth, slaveWidth);
+	clientHeight = MAX(clientHeight, slaveHeight);
+    }
+
+    /* Client width/height overridable by widget options:
+     */
+    Tcl_GetIntFromObj(NULL, nb->notebook.widthObj,&reqWidth);
+    Tcl_GetIntFromObj(NULL, nb->notebook.heightObj,&reqHeight);
+    if (reqWidth > 0)
+	clientWidth = reqWidth;
+    if (reqHeight > 0)
+	clientHeight = reqHeight;
+
+    /* Tab row:
+     */
+    TabrowSize(nb, nbstyle.tabOrient, &tabrowWidth, &tabrowHeight);
+    tabrowHeight += Ttk_PaddingHeight(nbstyle.tabMargins);
+    tabrowWidth += Ttk_PaddingWidth(nbstyle.tabMargins);
+
+    /* Account for exterior and interior padding:
+     */
+    padding = nbstyle.padding;
+    if (clientNode) {
+	Ttk_Padding ipad =
+	    Ttk_LayoutNodeInternalPadding(nb->core.layout, clientNode);
+	padding = Ttk_AddPadding(padding, ipad);
+    }
+
+    *widthPtr = MAX(tabrowWidth, clientWidth) + Ttk_PaddingWidth(padding);
+    *heightPtr = tabrowHeight + clientHeight + Ttk_PaddingHeight(padding);
+
+    return 1;
+}
+
+/*------------------------------------------------------------------------
+ * +++ Geometry management - layout.
+ */
+
+/* SqueezeTabs --
+ *	If the notebook is not wide enough to display all tabs,
+ *	attempt to decrease tab widths to fit.
+ *
+ *	All tabs are shrunk by an equal amount, but will not be made
+ *	smaller than the minimum width.  (If all the tabs still do
+ *	not fit in the available space, the rightmost tabs are truncated).
+ *
+ *	The algorithm does not always yield an optimal layout, but does
+ *	have the important property that decreasing the available width
+ *	by one pixel will cause at most one tab to shrink by one pixel;
+ *	this means that tabs resize "smoothly" when the window shrinks
+ *	and grows.
+ *
+ * @@@ <<NOTE-TABPOSITION>> bug: only works for horizontal orientations
+ */
+
+static void SqueezeTabs(
+    Notebook *nb, int desiredWidth, int availableWidth, int minTabWidth)
+{
+    int nTabs = Ttk_NumberSlaves(nb->notebook.mgr);
+    int shrinkage = desiredWidth - availableWidth;
+    int extra = 0;
+    int i;
+
+    for (i = 0; i < nTabs; ++i) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr,i);
+	int shrink = (shrinkage/nTabs) + (i < (shrinkage%nTabs)) + extra;
+	int shrinkability = MAX(0, tab->width - minTabWidth);
+	int delta = MIN(shrinkability, shrink);
+	tab->width -= delta;
+	extra = shrink - delta;
+    }
+}
+
+/* PlaceTabs --
+ * 	Compute all tab parcels.
+ */
+static void PlaceTabs(
+    Notebook *nb, Ttk_Box tabrowBox, Ttk_PositionSpec tabPlacement)
+{
+    Ttk_Layout tabLayout = nb->notebook.tabLayout;
+    int nTabs = Ttk_NumberSlaves(nb->notebook.mgr);
+    int i;
+
+    for (i = 0; i < nTabs; ++i) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, i);
+	Ttk_State tabState = TabState(nb, i);
+
+	if (tab->state != TAB_STATE_HIDDEN) {
+	    Ttk_Padding expand = Ttk_UniformPadding(0);
+	    Tcl_Obj *expandObj = Ttk_QueryOption(tabLayout,"-expand",tabState);
+
+	    if (expandObj) {
+		Ttk_GetBorderFromObj(NULL, expandObj, &expand);
+	    }
+
+	    tab->parcel =
+		Ttk_ExpandBox(
+		    Ttk_PositionBox(&tabrowBox,
+			tab->width, tab->height, tabPlacement),
+		    expand);
+	}
+    }
+}
+
+/* NotebookDoLayout --
+ *	Computes notebook layout and places tabs.
+ *
+ * Side effects:
+ * 	Sets clientArea, used to place slave panes.
+ */
+static void NotebookDoLayout(void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    Tk_Window nbwin = nb->core.tkwin;
+    Ttk_Box cavity = Ttk_WinBox(nbwin);
+    int tabrowWidth = 0, tabrowHeight = 0;
+    Ttk_LayoutNode *clientNode = Ttk_LayoutFindNode(nb->core.layout, "client");
+    Ttk_Box tabrowBox;
+    NotebookStyle nbstyle;
+
+    NotebookStyleOptions(nb, &nbstyle);
+
+    /* Notebook internal padding:
+     */
+    cavity = Ttk_PadBox(cavity, nbstyle.padding);
+
+    /* Layout for notebook background (base layout):
+     */
+    Ttk_PlaceLayout(nb->core.layout, nb->core.state, Ttk_WinBox(nbwin));
+
+    /* Place tabs:
+     */
+    TabrowSize(nb, nbstyle.tabOrient, &tabrowWidth, &tabrowHeight);
+    tabrowBox = Ttk_PadBox(
+		    Ttk_PositionBox(&cavity,
+			tabrowWidth + Ttk_PaddingWidth(nbstyle.tabMargins),
+			tabrowHeight + Ttk_PaddingHeight(nbstyle.tabMargins),
+			nbstyle.tabPosition),
+		    nbstyle.tabMargins);
+
+    if (tabrowWidth > tabrowBox.width) {
+	SqueezeTabs(nb, tabrowWidth, tabrowBox.width, nbstyle.minTabWidth);
+    }
+    PlaceTabs(nb, tabrowBox, nbstyle.tabPlacement);
+
+    /* Layout for client area frame:
+     */
+    if (clientNode) {
+	Ttk_PlaceLayoutNode(nb->core.layout, clientNode, cavity);
+	cavity = Ttk_LayoutNodeInternalParcel(nb->core.layout, clientNode);
+    }
+
+    if (cavity.height <= 0) cavity.height = 1;
+    if (cavity.width <= 0) cavity.width = 1;
+
+    nb->notebook.clientArea = cavity;
+}
+
+/*
+ * NotebookPlaceSlave --
+ * 	Set the position and size of a child widget
+ * 	based on the current client area and slave options:
+ */
+static void NotebookPlaceSlave(Notebook *nb, int slaveIndex)
+{
+    Tab *tab = Ttk_SlaveData(nb->notebook.mgr, slaveIndex);
+    Tk_Window slaveWindow = Ttk_SlaveWindow(nb->notebook.mgr, slaveIndex);
+    Ttk_Box slaveBox =
+	Ttk_StickBox(Ttk_PadBox(nb->notebook.clientArea, tab->padding),
+	    Tk_ReqWidth(slaveWindow), Tk_ReqHeight(slaveWindow),tab->sticky);
+
+    Ttk_PlaceSlave(nb->notebook.mgr, slaveIndex,
+	slaveBox.x, slaveBox.y, slaveBox.width, slaveBox.height);
+}
+
+/* NotebookPlaceSlaves --
+ * 	Geometry manager hook.
+ */
+static void NotebookPlaceSlaves(void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    int currentIndex = nb->notebook.currentIndex;
+    if (currentIndex >= 0) {
+	NotebookDoLayout(nb);
+	NotebookPlaceSlave(nb, currentIndex);
+    }
+}
+
+/*
+ * SelectTab(nb, index) --
+ * 	Change the currently-selected tab.
+ */
+static void SelectTab(Notebook *nb, int index)
+{
+    Tab *tab = Ttk_SlaveData(nb->notebook.mgr,index);
+    int currentIndex = nb->notebook.currentIndex;
+
+    if (index == currentIndex) {
+	return;
+    }
+
+    if (TabState(nb, index) & TTK_STATE_DISABLED) {
+	return;
+    }
+
+    /* Unhide the tab if it is currently hidden and being selected.
+     */
+    if (tab->state == TAB_STATE_HIDDEN) {
+	tab->state = TAB_STATE_NORMAL;
+    }
+
+    if (currentIndex >= 0) {
+	Ttk_UnmapSlave(nb->notebook.mgr, currentIndex);
+    }
+
+    NotebookPlaceSlave(nb, index);
+
+    nb->notebook.currentIndex = index;
+    TtkRedisplayWidget(&nb->core);
+
+    SendVirtualEvent(nb->core.tkwin, "NotebookTabChanged");
+}
+
+/* NextTab --
+ * 	Returns the index of the next tab after the specified tab
+ * 	in the normal state (e.g., not hidden or disabled),
+ * 	or -1 if all tabs are disabled or hidden.
+ */
+static int NextTab(Notebook *nb, int index)
+{
+    int nTabs = Ttk_NumberSlaves(nb->notebook.mgr);
+    int nextIndex;
+
+    /* Scan forward for following usable tab:
+     */
+    for (nextIndex = index + 1; nextIndex < nTabs; ++nextIndex) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, nextIndex);
+	if (tab->state == TAB_STATE_NORMAL) {
+	    return nextIndex;
+	}
+    }
+
+    /* Not found -- scan backwards.
+     */
+    for (nextIndex = index - 1; nextIndex >= 0; --nextIndex) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, nextIndex);
+	if (tab->state == TAB_STATE_NORMAL) {
+	    return nextIndex;
+	}
+    }
+
+    /* Still nothing.  Give up.
+     */
+    return -1;
+}
+
+/* SelectNearestTab --
+ * 	Handles the case where the current tab is forgotten, hidden,
+ * 	or destroyed. Select the next available tab; or, if there is none,
+ * 	leaves all tabs unselected.
+ */
+static void SelectNearestTab(Notebook *nb)
+{
+    int nextIndex = NextTab(nb, nb->notebook.currentIndex);
+
+    if (nextIndex >= 0) {
+	SelectTab(nb, nextIndex);
+    } else {
+	/* No available tabs -- unmap current one.
+	 * ASSERT: this is safe to do even when the slave is being destroyed.
+	 */
+	if (nb->notebook.currentIndex >= 0) {
+	    Ttk_UnmapSlave(nb->notebook.mgr, nb->notebook.currentIndex);
+	    SendVirtualEvent(nb->core.tkwin, "NotebookTabChanged");
+	}
+	nb->notebook.currentIndex = -1;
+    }
+}
+
+/* TabAdded -- GM SlaveAdded hook.
+ */
+static void TabAdded(Ttk_Manager *mgr, int slaveIndex) { /* No-op */ }
+
+/* TabRemoved -- GM SlaveRemoved hook.
+ * 	Select the next tab if the current one is being removed.
+ * 	Adjust currentIndex to account for removed slave if needed.
+ */
+static void TabRemoved(Ttk_Manager *mgr, int index)
+{
+    Notebook *nb = mgr->managerData;
+
+    if (index == nb->notebook.currentIndex) {
+	SelectNearestTab(nb);
+    }
+
+    if (index < nb->notebook.currentIndex) {
+	--nb->notebook.currentIndex;
+    }
+
+    TtkRedisplayWidget(&nb->core);
+}
+
+/* TabConfigured -- GM slaveConfigured hook.
+ */
+static int TabConfigured(
+    Tcl_Interp *interp, Ttk_Manager *mgr, Ttk_Slave *slave, unsigned mask)
+{
+    Tab *tab = slave->slaveData;
+    Ttk_Sticky sticky = tab->sticky;
+    Tk_Window tkwin = mgr->masterWindow;
+
+    /* Check options:
+     * @@@ TODO: validate -image option with GetImageList()
+     */
+    if (Ttk_GetStickyFromObj(interp, tab->stickyObj, &sticky) != TCL_OK) {
+	return TCL_ERROR;
+    }
+    if (Ttk_GetPaddingFromObj(interp,tkwin,tab->paddingObj,&tab->padding)
+	!= TCL_OK)
+    {
+	return TCL_ERROR;
+    }
+
+    tab->sticky = sticky;
+    return TCL_OK;
+}
+
+static Ttk_ManagerSpec NotebookManagerSpec =
+{
+    { "notebook", Ttk_GeometryRequestProc, Ttk_LostSlaveProc },
+    PaneOptionSpecs, sizeof(Tab),
+
+    NotebookSize,
+    NotebookPlaceSlaves,
+    TabAdded,
+    TabRemoved,
+    TabConfigured
+};
+
+/*------------------------------------------------------------------------
+ * +++ Event handlers.
+ */
+
+/* NotebookEventHandler --
+ * 	Tracks the active tab.
+ */
+static const int NotebookEventMask
+    = StructureNotifyMask
+    | PointerMotionMask
+    | LeaveWindowMask
+    ;
+static void NotebookEventHandler(ClientData clientData, XEvent *eventPtr)
+{
+    Notebook *nb = clientData;
+
+    if (eventPtr->type == DestroyNotify) { /* Remove self */
+	Tk_DeleteEventHandler(nb->core.tkwin,
+	    NotebookEventMask, NotebookEventHandler, clientData);
+    } else if (eventPtr->type == MotionNotify) {
+	int index = IdentifyTab(nb, eventPtr->xmotion.x, eventPtr->xmotion.y);
+	ActivateTab(nb, index);
+    } else if (eventPtr->type == LeaveNotify) {
+	ActivateTab(nb, -1);
+    }
+}
+
+/*------------------------------------------------------------------------
+ * +++ Utilities.
+ */
+
+/* FindTabIndex --
+ *	Find the index of the specified tab.
+ *	Tab identifiers are one of:
+ *
+ *	+ positional specifications @x,y,
+ *	+ "current",
+ *	+ numeric indices [0..nTabs],
+ *	+ slave window names
+ *
+ *	Stores index of specified tab in *index_rtn, -1 if not found.
+ *
+ *	Returns TCL_ERROR and leaves an error message in interp->result
+ *	if the tab identifier was incorrect.
+ *
+ *	See also: GetTabIndex.
+ */
+static int FindTabIndex(
+    Tcl_Interp *interp, Notebook *nb, Tcl_Obj *objPtr, int *index_rtn)
+{
+    const char *string = Tcl_GetString(objPtr);
+    int x, y;
+
+    *index_rtn = -1;
+
+    /* Check for @x,y ...
+     */
+    if (string[0] == '@' && sscanf(string, "@%d,%d",&x,&y) == 2) {
+	*index_rtn = IdentifyTab(nb, x, y);
+	return TCL_OK;
+    }
+
+    /* ... or "current" ...
+     */
+    if (!strcmp(string, "current")) {
+	*index_rtn = nb->notebook.currentIndex;
+	return TCL_OK;
+    }
+
+    /* ... or integer index or slave window name:
+     */
+    if (Ttk_GetSlaveFromObj(
+	    interp, nb->notebook.mgr, objPtr, index_rtn) != NULL)
+    {
+	return TCL_OK;
+    }
+
+    /* Nothing matched; Ttk_GetSlaveFromObj will have left error message.
+     */
+    return TCL_ERROR;
+}
+
+/* GetTabIndex --
+ * 	Get the index of an existing tab.
+ * 	Tab identifiers are as per FindTabIndex.
+ * 	Returns TCL_ERROR if the tab does not exist.
+ */
+static int GetTabIndex(
+    Tcl_Interp *interp, Notebook *nb, Tcl_Obj *objPtr, int *index_rtn)
+{
+    int status = FindTabIndex(interp, nb, objPtr, index_rtn);
+
+    if (status == TCL_OK && *index_rtn < 0) {
+	Tcl_ResetResult(interp);
+	Tcl_AppendResult(interp,
+	    "tab '", Tcl_GetString(objPtr), "' not found",
+	    NULL);
+	status = TCL_ERROR;
+    }
+    return status;
+}
+
+/*------------------------------------------------------------------------
+ * +++ Widget command routines.
+ */
+
+/* $nb add window ?options ... ?
+ */
+static int NotebookAddCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    int index = nb->notebook.mgr->nSlaves;
+    Tk_Window slaveWindow;
+
+    if (objc <= 2 || objc % 2 != 1) {
+	Tcl_WrongNumArgs(interp, 2, objv, "window ?options...?");
+	return TCL_ERROR;
+    }
+
+    slaveWindow = Tk_NameToWindow(interp,Tcl_GetString(objv[2]),nb->core.tkwin);
+    if (!slaveWindow) {
+	return TCL_ERROR;
+    }
+
+    /* Create and initialize new tab:
+     */
+    if (TCL_OK != Ttk_AddSlave(
+	    interp, nb->notebook.mgr, slaveWindow, index, objc-3,objv+3) )
+    {
+    	return TCL_ERROR;
+    }
+
+    /* If no tab is currently selected (or if this is the first tab),
+     * select this one:
+     */
+    if (nb->notebook.currentIndex < 0) {
+	SelectTab(nb, index);
+    }
+
+    TtkResizeWidget(&nb->core);
+
+    return TCL_OK;
+}
+
+/* $nb insert $index $tab ?options...?
+ * 	Insert new tab, or move existing one.
+ */
+static int NotebookInsertCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *const objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    int current = nb->notebook.currentIndex;
+    int srcIndex, destIndex;
+    int status = TCL_OK;
+
+    if (objc < 4) {
+	Tcl_WrongNumArgs(interp, 2,objv, "index slave ?options...?");
+	return TCL_ERROR;
+    }
+
+    if (!strcmp(Tcl_GetString(objv[2]), "end")) {
+	destIndex = Ttk_NumberSlaves(nb->notebook.mgr);
+    } else if (!Ttk_GetSlaveFromObj(
+		interp, nb->notebook.mgr, objv[2], &destIndex)) {
+	return TCL_ERROR;
+    }
+
+    if (!Ttk_GetSlaveFromObj(interp, nb->notebook.mgr, objv[3], &srcIndex)) {
+	/* Try adding new slave:
+	 */
+	Tk_Window slaveWindow =
+	    Tk_NameToWindow(interp,Tcl_GetString(objv[3]),nb->core.tkwin);
+	if (!slaveWindow) {
+	    return TCL_ERROR;
+	}
+
+	if (Ttk_AddSlave(interp, nb->notebook.mgr, slaveWindow,
+		destIndex, objc - 4, objv + 4) != TCL_OK)
+	{
+	    return TCL_ERROR;
+	}
+	if (nb->notebook.currentIndex <= destIndex) {
+	    ++nb->notebook.currentIndex;
+	}
+	return TCL_OK;
+    }
+
+    /* else - move existing slave: */
+
+    if (destIndex >= nb->notebook.mgr->nSlaves) {
+	destIndex  = nb->notebook.mgr->nSlaves - 1;
+    }
+    Ttk_ReorderSlave(nb->notebook.mgr, srcIndex, destIndex);
+
+    /* Adjust internal indexes:
+     */
+    nb->notebook.activeIndex = -1;
+    if (current == srcIndex) {
+	nb->notebook.currentIndex = destIndex;
+    } else if (destIndex <= current && current < srcIndex) {
+	++nb->notebook.currentIndex;
+    } else if (srcIndex < current && current <= destIndex) {
+	--nb->notebook.currentIndex;
+    }
+
+    if (objc > 4) {
+	status = Ttk_ConfigureSlave(interp, nb->notebook.mgr,
+	     nb->notebook.mgr->slaves[destIndex], objc-4,objv+4);
+    }
+
+    TtkRedisplayWidget(&nb->core);
+
+    return status;
+}
+
+/* $nb forget $item --
+ * 	Removes the selected tab.
+ */
+static int NotebookForgetCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    int index;
+
+    if (objc != 3) {
+	Tcl_WrongNumArgs(interp, 2, objv, "tab");
+	return TCL_ERROR;
+    }
+
+    if (GetTabIndex(interp, nb, objv[2], &index) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    Ttk_ForgetSlave(nb->notebook.mgr, index);
+
+    return TCL_OK;
+}
+
+/* $nb identify $x $y --
+ * 	Returns name of tab element at $x,$y; empty string if none.
+ */
+static int NotebookIdentifyCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    Ttk_LayoutNode *node = NULL;
+    int x, y, tabIndex;
+
+    if (objc != 4) {
+	Tcl_WrongNumArgs(interp, 2, objv, "x y");
+	return TCL_ERROR;
+    }
+
+    if (   Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK
+	|| Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)
+    {
+	return TCL_ERROR;
+    }
+
+    tabIndex = IdentifyTab(nb, x, y);
+    if (tabIndex >= 0) {
+	Tab *tab = Ttk_SlaveData(nb->notebook.mgr, tabIndex);
+	Ttk_State state = TabState(nb, tabIndex);
+	Ttk_Layout tabLayout = nb->notebook.tabLayout;
+
+	Ttk_RebindSublayout(tabLayout, tab);
+	Ttk_PlaceLayout(tabLayout, state, tab->parcel);
+
+	node = Ttk_LayoutIdentify(tabLayout, x, y); 
+    }
+
+    if (node) {
+	const char *elementName = Ttk_LayoutNodeName(node);
+	Tcl_SetObjResult(interp,Tcl_NewStringObj(elementName,-1));
+    }
+
+    return TCL_OK;
+}
+
+/* $nb index $item --
+ * 	Returns the integer index of the tab specified by $item,
+ * 	the empty string if $item does not identify a tab.
+ *	See above for valid item formats.
+ */
+static int NotebookIndexCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    int index, status;
+
+    if (objc != 3) {
+	Tcl_WrongNumArgs(interp, 2, objv, "tab");
+	return TCL_ERROR;
+    }
+
+    /*
+     * Special-case for "end":
+     */
+    if (!strcmp("end", Tcl_GetString(objv[2]))) {
+	Tcl_SetObjResult(interp, Tcl_NewIntObj(nb->notebook.mgr->nSlaves));
+	return TCL_OK;
+    }
+
+    status = FindTabIndex(interp, nb, objv[2], &index);
+    if (status == TCL_OK && index >= 0) {
+	Tcl_SetObjResult(interp, Tcl_NewIntObj(index));
+    }
+
+    return status;
+}
+
+/* $nb select ?$item? --
+ * 	Select the specified tab, or return the widget path of
+ * 	the currently-selected pane.
+ */
+static int NotebookSelectCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+
+    if (objc == 2) {
+	if (nb->notebook.currentIndex >= 0) {
+	    Tk_Window pane = Ttk_SlaveWindow(
+		nb->notebook.mgr, nb->notebook.currentIndex);
+	    Tcl_SetObjResult(interp, Tcl_NewStringObj(Tk_PathName(pane), -1));
+	}
+	return TCL_OK;
+    } else if (objc == 3) {
+	int index, status = GetTabIndex(interp, nb, objv[2], &index);
+	if (status == TCL_OK) {
+	    SelectTab(nb, index);
+	}
+	return status;
+    } /*else*/
+    Tcl_WrongNumArgs(interp, 2, objv, "?tab?");
+    return TCL_ERROR;
+}
+
+/* $nb tabs --
+ * 	Return list of tabs.
+ */
+static int NotebookTabsCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    Ttk_Manager *mgr = nb->notebook.mgr;
+    Tcl_Obj *result;
+    int i;
+
+    if (objc != 2) {
+	Tcl_WrongNumArgs(interp, 2, objv, "");
+	return TCL_ERROR;
+    }
+
+    result = Tcl_NewListObj(0, NULL);
+    for (i = 0; i < mgr->nSlaves; ++i) {
+	const char *pathName = Tk_PathName(Ttk_SlaveWindow(mgr,i));
+	Tcl_ListObjAppendElement(interp, result, Tcl_NewStringObj(pathName,-1));
+    }
+    Tcl_SetObjResult(interp, result);
+
+    return TCL_OK;
+}
+
+/* $nb tab $tab ?-option ?value -option value...??
+ */
+static int NotebookTabCommand(
+    Tcl_Interp *interp, int objc, Tcl_Obj * CONST objv[], void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    Ttk_Manager *mgr = nb->notebook.mgr;
+    int index;
+    Ttk_Slave *slave;
+    Tab *tab;
+
+    if (objc < 3) {
+	Tcl_WrongNumArgs(interp, 2, objv, "tab ?-option ?value??...");
+	return TCL_ERROR;
+    }
+
+    if (GetTabIndex(interp, nb, objv[2], &index) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    slave = mgr->slaves[index];
+    tab = Ttk_SlaveData(mgr, index);
+
+    if (objc == 3) {
+	return EnumerateOptions(interp, tab,
+	    PaneOptionSpecs, nb->notebook.paneOptionTable, nb->core.tkwin);
+    } else if (objc == 4) {
+	return GetOptionValue(interp, tab, objv[3],
+	    nb->notebook.paneOptionTable, nb->core.tkwin);
+    } /* else */
+
+    if (Ttk_ConfigureSlave(interp, mgr, slave, objc - 3,objv + 3) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /* If the current tab has become disabled or hidden,
+     * select the next nondisabled, unhidden one:
+     */
+    if (index == nb->notebook.currentIndex && tab->state != TAB_STATE_NORMAL) {
+	SelectNearestTab(nb);
+    }
+
+    TtkResizeWidget(&nb->core);
+    return TCL_OK;
+}
+
+/* Subcommand table:
+ */
+static WidgetCommandSpec NotebookCommands[] =
+{
+    { "add",    	NotebookAddCommand },
+    { "configure",	WidgetConfigureCommand },
+    { "cget",		WidgetCgetCommand },
+    { "forget",		NotebookForgetCommand },
+    { "identify",	NotebookIdentifyCommand },
+    { "index",		NotebookIndexCommand },
+    { "insert",  	NotebookInsertCommand },
+    { "instate",	WidgetInstateCommand },
+    { "select",		NotebookSelectCommand },
+    { "state",  	WidgetStateCommand },
+    { "tab",   		NotebookTabCommand },
+    { "tabs",   	NotebookTabsCommand },
+    { 0,0 }
+};
+
+/*------------------------------------------------------------------------
+ * +++ Widget class hooks.
+ */
+
+static int NotebookInitialize(Tcl_Interp *interp, void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+
+    nb->notebook.mgr = Ttk_CreateManager(
+	    &NotebookManagerSpec, recordPtr, nb->core.tkwin);
+
+    nb->notebook.tabOptionTable = Tk_CreateOptionTable(interp,TabOptionSpecs);
+    nb->notebook.paneOptionTable = Tk_CreateOptionTable(interp,PaneOptionSpecs);
+
+    nb->notebook.currentIndex = -1;
+    nb->notebook.activeIndex = -1;
+    nb->notebook.tabLayout = 0;
+
+    nb->notebook.clientArea = Ttk_MakeBox(0,0,1,1);
+
+    Tk_CreateEventHandler(
+	nb->core.tkwin, NotebookEventMask, NotebookEventHandler, recordPtr);
+
+    return TCL_OK;
+}
+
+static void NotebookCleanup(void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+
+    Ttk_DeleteManager(nb->notebook.mgr);
+    Tk_DeleteOptionTable(nb->notebook.tabOptionTable);
+    Tk_DeleteOptionTable(nb->notebook.paneOptionTable);
+
+    if (nb->notebook.tabLayout)
+	Ttk_FreeLayout(nb->notebook.tabLayout);
+}
+
+static int NotebookConfigure(Tcl_Interp *interp, void *clientData, int mask)
+{
+    Notebook *nb = clientData;
+
+    /*
+     * Error-checks:
+     */
+    if (nb->notebook.paddingObj) {
+	/* Check for valid -padding: */
+	Ttk_Padding unused;
+	if (Ttk_GetPaddingFromObj(
+		    interp, nb->core.tkwin, nb->notebook.paddingObj, &unused)
+		!= TCL_OK) {
+	    return TCL_ERROR;
+	}
+    }
+
+    return CoreConfigure(interp, clientData, mask);
+}
+
+/* NotebookGetLayout  --
+ * 	GetLayout widget hook.
+ */
+static Ttk_Layout NotebookGetLayout(
+    Tcl_Interp *interp, Ttk_Theme theme, void *recordPtr)
+{
+    Notebook *nb = recordPtr;
+    Ttk_Layout notebookLayout = WidgetGetLayout(interp, theme, recordPtr);
+    Ttk_Layout tabLayout;
+
+    if (!notebookLayout) {
+	return NULL;
+    }
+
+    tabLayout = Ttk_CreateSublayout(
+	interp, theme, notebookLayout, ".Tab",	nb->notebook.tabOptionTable);
+
+    if (tabLayout) {
+	if (nb->notebook.tabLayout) {
+	    Ttk_FreeLayout(nb->notebook.tabLayout);
+	}
+	nb->notebook.tabLayout = tabLayout;
+    }
+
+    return notebookLayout;
+}
+
+/* +++ Display routines.
+ */
+
+static void DisplayTab(Notebook *nb, int index, Drawable d)
+{
+    Ttk_Layout tabLayout = nb->notebook.tabLayout;
+    Tab *tab = Ttk_SlaveData(nb->notebook.mgr, index);
+    Ttk_State state = TabState(nb, index);
+
+    if (tab->state != TAB_STATE_HIDDEN) {
+	Ttk_RebindSublayout(tabLayout, tab);
+	Ttk_PlaceLayout(tabLayout, state, tab->parcel);
+	Ttk_DrawLayout(tabLayout, state, d);
+    }
+}
+
+static void NotebookDisplay(void *clientData, Drawable d)
+{
+    Notebook *nb = clientData;
+    int index;
+
+    /* Draw notebook background (base layout):
+     */
+    Ttk_DrawLayout(nb->core.layout, nb->core.state, d);
+
+    /* Draw tabs from left to right, but draw the current tab last
+     * so it will overwrite its neighbors.
+     */
+    for (index = 0; index < nb->notebook.mgr->nSlaves; ++index) {
+	if (index != nb->notebook.currentIndex) {
+	    DisplayTab(nb, index, d);
+	}
+    }
+    if (nb->notebook.currentIndex >= 0) {
+	DisplayTab(nb, nb->notebook.currentIndex, d);
+    }
+}
+
+/*------------------------------------------------------------------------
+ * +++ Widget specification and layout definitions.
+ */
+
+static WidgetSpec NotebookWidgetSpec =
+{
+    "TNotebook",		/* className */
+    sizeof(Notebook),		/* recordSize */
+    NotebookOptionSpecs,	/* optionSpecs */
+    NotebookCommands,		/* subcommands */
+    NotebookInitialize,		/* initializeProc */
+    NotebookCleanup,		/* cleanupProc */
+    NotebookConfigure,		/* configureProc */
+    NullPostConfigure,		/* postConfigureProc */
+    NotebookGetLayout, 		/* getLayoutProc */
+    NotebookSize,		/* geometryProc */
+    NotebookDoLayout,		/* layoutProc */
+    NotebookDisplay		/* displayProc */
+};
+
+TTK_BEGIN_LAYOUT(NotebookLayout)
+    TTK_NODE("Notebook.client", TTK_FILL_BOTH)
+TTK_END_LAYOUT
+
+TTK_BEGIN_LAYOUT(TabLayout)
+    TTK_GROUP("Notebook.tab", TTK_FILL_BOTH,
+	TTK_GROUP("Notebook.padding", TTK_PACK_TOP|TTK_FILL_BOTH,
+	    TTK_GROUP("Notebook.focus", TTK_PACK_TOP|TTK_FILL_BOTH,
+		TTK_NODE("Notebook.label", TTK_PACK_TOP))))
+TTK_END_LAYOUT
+
+int Notebook_Init(Tcl_Interp *interp)
+{
+    Ttk_Theme themePtr = Ttk_GetDefaultTheme(interp);
+
+    Ttk_RegisterLayout(themePtr, "Tab", TabLayout);
+    Ttk_RegisterLayout(themePtr, "TNotebook", NotebookLayout);
+
+    RegisterWidget(interp, "ttk::notebook", &NotebookWidgetSpec);
+
+    return TCL_OK;
+}
+
+/*EOF*/