Added a tab widget

widget/public/Makefile

@@ -21,6 +21,7 @@ DEFINES = -D_IMPL_NS_UI
 
 EXPORTS =               \
 	nsui.h		\
+		nsITabWidget.h  \
         nsIWidget.h     \
         nsIButton.h     \
         nsICheckButton.h\

widget/public/makefile.win

@@ -25,7 +25,7 @@ EXPORTS=nsui.h nsIWidget.h nsIButton.h nsICheckButton.h nsIListWidget.h \
     nsIComboBox.h nsITextWidget.h nsITextAreaWidget.h nsIComboBox.h \
     nsIListBox.h nsIFileWidget.h nsIScrollbar.h nsGUIEvent.h \
     nsIRadioButton.h nsIRadioGroup.h nsIMouseListener.h \
-    nsIEventListener.h nsIToolkit.h nsWidgetsCID.h 
+    nsIEventListener.h nsIToolkit.h nsWidgetsCID.h nsITabWidget.h
 
 include <$(DEPTH)\config\rules.mak>
 

widget/public/nsGUIEvent.h

@@ -84,6 +84,7 @@ struct nsScrollbarEvent : public nsGUIEvent {
     PRUint32        position; 
 };
 
+
 /**
  * Keyboard event
  */
@@ -99,7 +100,6 @@ struct nsKeyEvent : public nsGUIEvent {
     PRBool          isAlt;          
 };
 
-
 /**
  * GUI MESSAGES
  */
@@ -115,6 +115,7 @@ struct nsKeyEvent : public nsGUIEvent {
 
 #define NS_KEY_UP                       (NS_WINDOW_START + 32)
 #define NS_KEY_DOWN                     (NS_WINDOW_START + 33)
+#define NS_TABCHANGE                    (NS_WINDOW_START + 34)
 
 #define NS_MOUSE_MESSAGE_START          300
 #define NS_MOUSE_MOVE                   (NS_MOUSE_MESSAGE_START)

widget/public/nsITabWidget.h

@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nsITabWidget_h__
+#define nsITabWidget_h__
+
+#include "nsIWidget.h"
+#include "nsString.h"
+
+#define NS_ITABWIDGET_IID      \
+{ 0xf05ba6e0, 0xd4a7, 0x11d1, { 0x9e, 0xc0, 0x0, 0xaa, 0x0, 0x2f, 0xb8, 0x21 } };
+
+/**
+ * Tab widget.
+ * Presents a lists of tabs to be clicked on.
+ */
+class nsITabWidget : public nsIWidget {
+
+  public:
+ 
+   /**
+    * Setup the tabs
+    *
+    * @param aNumberOfTabs  The number of tabs in aTabLabels and aTabID
+    * @param aTabLabels     title displayed in the tab
+    */
+  
+    virtual void SetTabs(PRUint32 aNumberOfTabs, const nsString aTabLabels[]) = 0;
+
+   /**
+    * Get selected tab
+    *
+    * @return the index of the selected tab. Index ranges between 0 and (NumberOfTabs - 1)
+    */
+  
+    virtual PRUint32 GetSelectedTab() = 0;
+  
+};
+
+#endif

widget/public/nsWidgetsCID.h

@@ -81,3 +81,8 @@
 { 0x2d96b3dc, 0xc051, 0x11d1, \
     {0xa8, 0x27, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9} }
 
+/* 2d96b3dc-c051-11d1-a827-0040959a28c9 */
+#define NS_TABWIDGET_CID \
+{ 0x2d96b3dd, 0xc051, 0x11d1, \
+    {0xa8, 0x27, 0x00, 0x40, 0x95, 0x9a, 0x28, 0xc9} }
+

widget/src/windows/makefile.win

@@ -23,49 +23,51 @@ DLLNAME = raptorwidget
 DLL=.\$(OBJDIR)\$(DLLNAME).dll
 RESFILE = widget.res
 
-MISCDEP =			\
+MISCDEP =                       \
  $(DIST)\lib\xpcom32.lib        \
- $(DIST)\lib\raptorbase.lib	\
+ $(DIST)\lib\raptorbase.lib     \
  $(DIST)\lib\raptorgfx.lib
 
 MODULE=raptor 
 
 DEFINES =-D_IMPL_NS_WIDGET
 
-OBJS =					 \
-	.\$(OBJDIR)\nsWidgetFactory.obj	 \
-	.\$(OBJDIR)\nsObject.obj	 \
-	.\$(OBJDIR)\nsWindow.obj	 \
-	.\$(OBJDIR)\nsToolkit.obj	 \
-	.\$(OBJDIR)\nsButton.obj	 \
-	.\$(OBJDIR)\nsCheckButton.obj	 \
-	.\$(OBJDIR)\nsRadioGroup.obj	 \
-	.\$(OBJDIR)\nsRadioButton.obj	 \
-	.\$(OBJDIR)\nsListBox.obj	 \
-	.\$(OBJDIR)\nsComboBox.obj	 \
-	.\$(OBJDIR)\nsTextWidget.obj	 \
-	.\$(OBJDIR)\nsTextHelper.obj	 \
+OBJS =                                   \
+	.\$(OBJDIR)\nsWidgetFactory.obj  \
+	.\$(OBJDIR)\nsObject.obj         \
+	.\$(OBJDIR)\nsWindow.obj         \
+	.\$(OBJDIR)\nsToolkit.obj        \
+	.\$(OBJDIR)\nsButton.obj         \
+	.\$(OBJDIR)\nsCheckButton.obj    \
+	.\$(OBJDIR)\nsRadioGroup.obj     \
+	.\$(OBJDIR)\nsRadioButton.obj    \
+	.\$(OBJDIR)\nsListBox.obj        \
+	.\$(OBJDIR)\nsComboBox.obj       \
+	.\$(OBJDIR)\nsTextWidget.obj     \
+	.\$(OBJDIR)\nsTextHelper.obj     \
 	.\$(OBJDIR)\nsTextAreaWidget.obj \
-	.\$(OBJDIR)\nsFileWidget.obj	 \
-	.\$(OBJDIR)\nsScrollbar.obj	 \
+	.\$(OBJDIR)\nsFileWidget.obj     \
+	.\$(OBJDIR)\nsScrollbar.obj      \
+	.\$(OBJDIR)\nsTabWidget.obj      \
 	$(NULL)
 
-LINCS=					\
-	-I$(PUBLIC)\raptor		\
-	-I$(PUBLIC)\xpcom		\
+LINCS=                                  \
+	-I$(PUBLIC)\raptor              \
+	-I$(PUBLIC)\xpcom               \
 	$(NULL)
 
-LCFLAGS =				\
-	$(LCFLAGS)			\
-	-D_IMPL_NS_WIDGET		\
-	-DNS_DLLNAME=$(DLLNAME).dll	\
+LCFLAGS =                               \
+	$(LCFLAGS)                      \
+	-D_IMPL_NS_WIDGET               \
+	-DNS_DLLNAME=$(DLLNAME).dll     \
 	$(NULL)
 
-LLIBS=					\
- comdlg32.lib				\
- $(DIST)\lib\xpcom32.lib		\
- $(DIST)\lib\raptorgfx.lib		\
- $(DIST)\lib\raptorbase.lib		\
+LLIBS=                                  \
+ comctl32.lib                           \
+ comdlg32.lib                           \
+ $(DIST)\lib\xpcom32.lib                \
+ $(DIST)\lib\raptorgfx.lib              \
+ $(DIST)\lib\raptorbase.lib             \
  $(LIBNSPR)  
 
 include <$(DEPTH)\config\rules.mak>

widget/src/windows/nsTabWidget.cpp

@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#include "nsTabWidget.h"
+#include "nsToolkit.h"
+#include "nsColor.h"
+#include "nsGUIEvent.h"
+#include "nsString.h"
+#include "nsStringUtil.h"
+#include <commctrl.h>
+#include <windows.h>
+
+//-------------------------------------------------------------------------
+//
+// nsTabWidget constructor
+//
+//-------------------------------------------------------------------------
+nsTabWidget::nsTabWidget(nsISupports *aOuter) : nsWindow(aOuter)
+{
+   // Ensure that common controls dll is loaded
+  InitCommonControls();
+}
+
+//-------------------------------------------------------------------------
+//
+// nsTabWidget destructor
+//
+//-------------------------------------------------------------------------
+nsTabWidget::~nsTabWidget()
+{
+}
+
+//-------------------------------------------------------------------------
+//
+// Query interface implementation
+//
+//-------------------------------------------------------------------------
+nsresult nsTabWidget::QueryObject(const nsIID& aIID, void** aInstancePtr)
+{
+  nsresult result = nsWindow::QueryObject(aIID, aInstancePtr);
+
+  static NS_DEFINE_IID(kInsTabWidgetIID, NS_ITABWIDGET_IID);
+  if (result == NS_NOINTERFACE && aIID.Equals(kInsTabWidgetIID)) {
+      *aInstancePtr = (void*) ((nsITabWidget*)this);
+      AddRef();
+      result = NS_OK;
+  }
+
+  return result;
+}
+
+//-------------------------------------------------------------------------
+//
+// Set the tab labels
+//
+//-------------------------------------------------------------------------
+
+void nsTabWidget::SetTabs(PRUint32 aNumberOfTabs, const nsString aTabLabels[])
+{
+  TC_ITEM tie;
+  char labelTemp[256];
+
+  for (PRUint32 i = 0; i < aNumberOfTabs; i++) {
+    tie.mask = TCIF_TEXT;
+    aTabLabels[i].ToCString(labelTemp, 256);
+    tie.pszText = labelTemp;
+    TabCtrl_InsertItem(mWnd, i, &tie);
+  }
+}
+
+//-------------------------------------------------------------------------
+//
+// Get the currently selected tab
+//
+//-------------------------------------------------------------------------
+
+
+PRUint32 nsTabWidget::GetSelectedTab()
+{
+  return(TabCtrl_GetCurSel(mWnd));
+}
+
+//-------------------------------------------------------------------------
+//
+// paint message. Don't send the paint out
+//
+//-------------------------------------------------------------------------
+PRBool nsTabWidget::OnPaint()
+{
+  return PR_FALSE;
+}
+
+PRBool nsTabWidget::OnResize(nsRect &aWindowRect)
+{
+    return PR_FALSE;
+}
+
+//-------------------------------------------------------------------------
+//
+// return the window class name and initialize the class if needed
+//
+//-------------------------------------------------------------------------
+
+LPCTSTR nsTabWidget::WindowClass()
+{
+  return WC_TABCONTROL;
+}
+
+//-------------------------------------------------------------------------
+//
+// return window styles
+//
+//-------------------------------------------------------------------------
+DWORD nsTabWidget::WindowStyle()
+{ 
+  return WS_CHILD | WS_CLIPSIBLINGS; 
+}
+
+//-------------------------------------------------------------------------
+//
+// return window extended styles
+//
+//-------------------------------------------------------------------------
+DWORD nsTabWidget::WindowExStyle()
+{
+  return 0;
+}
+

widget/src/windows/nsTabWidget.h

@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#ifndef nsTabWidget_h__
+#define nsTabWidget_h__
+
+#include "nsdefs.h"
+#include "nsWindow.h"
+#include "nsSwitchToUIThread.h"
+
+#include "nsITabWidget.h"
+
+/**
+ * Native Win32 tab control wrapper
+ */
+
+class nsTabWidget : public nsWindow,
+                    public nsITabWidget
+{
+
+public:
+  nsTabWidget(nsISupports *aOuter);
+  virtual ~nsTabWidget();
+
+    // nsISupports. Forward to the nsObject base class
+  BASE_SUPPORT
+
+  virtual nsresult QueryObject(const nsIID& aIID, void** aInstancePtr);
+
+    // nsIWidget interface
+  BASE_IWIDGET_IMPL
+
+    // nsITabWidget part 
+  virtual void SetTabs(PRUint32 aNumberOfTabs, const nsString aTabLabels[]);
+  virtual PRUint32 GetSelectedTab();
+  virtual PRBool OnPaint();
+  virtual PRBool OnResize(nsRect &aWindowRect);
+
+protected:
+  virtual LPCTSTR WindowClass();
+  virtual DWORD   WindowStyle();
+  virtual DWORD   WindowExStyle();
+
+};
+
+#endif // nsTabWidget_h__

widget/src/windows/nsWidgetFactory.cpp

@@ -33,6 +33,7 @@
 #include "nsTextHelper.h"
 #include "nsTextWidget.h"
 #include "nsToolkit.h"
+#include "nsTabWidget.h"
 #include "nsWindow.h"
 
 static NS_DEFINE_IID(kCWindow, NS_WINDOW_CID);
@@ -48,6 +49,7 @@ static NS_DEFINE_IID(kCHorzScrollbar, NS_HORZSCROLLBAR_CID);
 static NS_DEFINE_IID(kCVertScrollbar, NS_VERTSCROLLBAR_CID);
 static NS_DEFINE_IID(kCTextArea, NS_TEXTAREA_CID);
 static NS_DEFINE_IID(kCTextField, NS_TEXTFIELD_CID);
+static NS_DEFINE_IID(kCTabWidget, NS_TABWIDGET_CID);
 
 static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
 static NS_DEFINE_IID(kIFactoryIID, NS_IFACTORY_IID);
@@ -182,6 +184,16 @@ nsresult nsWidgetFactory::CreateInstance(nsISupports *aOuter,
     else if (mClassID.Equals(kCTextField)) {
         inst = (nsObject*)new nsTextWidget(aOuter);
     }
+    else if (mClassID.Equals(kCTabWidget)) {
+        inst = (nsObject*)new nsTabWidget(aOuter);
+    }
+
+    printf("inside the widget factory\n");
+    printf("inside the widget factory\n");
+    printf("inside the widget factory\n");
+    printf("inside the widget factory\n");
+    printf("inside the widget factory\n");
+
   
     if (inst == NULL) {  
         return NS_ERROR_OUT_OF_MEMORY;  

widget/src/windows/nsWindow.cpp

@@ -27,6 +27,7 @@
 #include <windows.h>
 #include "nsGfxCIID.h"
 #include "resource.h"
+#include <commctrl.h>
 
 #include "prtime.h"
 
@@ -69,7 +70,20 @@ PRBool nsWindow::ConvertStatus(nsEventStatus aStatus)
 //-------------------------------------------------------------------------
 LRESULT CALLBACK nsWindow::WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
+      // Get the window which caused the event and ask it to process the message
     nsWindow *someWindow = (nsWindow*)::GetWindowLong(hWnd, GWL_USERDATA);
+
+
+      // Re-direct a tab change message destined for it's parent window to the
+      // the actual window which generated the event.
+    if (msg == WM_NOTIFY) {
+      LPNMHDR pnmh = (LPNMHDR) lParam;
+      if (pnmh->code == TCN_SELCHANGE) {             
+        someWindow = (nsWindow*)::GetWindowLong(pnmh->hwndFrom, GWL_USERDATA); 
+      }
+    }
+
+
     if (nsnull != someWindow) {
         LRESULT retValue;
         if (PR_TRUE == someWindow->ProcessMessage(msg, wParam, lParam, &retValue)) {
@@ -963,11 +977,25 @@ PRBool nsWindow::OnKey(PRUint32 aEventType, PRUint32 aKeyCode)
 PRBool nsWindow::ProcessMessage(UINT msg, WPARAM wParam, LPARAM lParam, LRESULT *aRetValue)
 {
     PRBool result = PR_FALSE; // call the default nsWindow proc
+
             
     *aRetValue = 0;
 
     switch (msg) {
 
+        
+        case WM_NOTIFY:
+            // TAB change
+        {
+          LPNMHDR pnmh = (LPNMHDR) lParam;
+
+          if (pnmh->code == TCN_SELCHANGE) {
+            DispatchEventToCallback(NS_TABCHANGE);
+            result = PR_TRUE;
+          }
+        }
+        break;
+
         case WM_DESTROY:
             // clean up.
             OnDestroy();
@@ -1424,6 +1452,40 @@ PRBool nsWindow::DispatchEvent(PRUint32 aEventType)
     return ConvertStatus(mEventListener->ProcessEvent(event));
 }
 
+
+//-------------------------------------------------------------------------
+//
+// Invokes ProcessEvent method on Event Listener object
+//
+//-------------------------------------------------------------------------
+PRBool nsWindow::DispatchEventToCallback(PRUint32 aEventType)
+{
+   // call the event callback 
+    if (mEventCallback) {
+        nsGUIEvent event;
+        event.widget = this;
+        
+        DWORD pos = ::GetMessagePos();
+        POINT cpos;
+
+        cpos.x = LOWORD(pos);
+        cpos.y = HIWORD(pos);
+
+        ::ScreenToClient(mWnd, &cpos);
+
+        event.point.x = cpos.x;
+        event.point.y = cpos.y;
+
+        event.time = ::GetMessageTime();
+        event.message = aEventType;
+
+        return(ConvertStatus((*mEventCallback)(&event)));
+    }
+    else
+        return(PR_FALSE);
+}
+
+
 //-------------------------------------------------------------------------
 //
 // Deal with all sort of mouse event
@@ -1525,7 +1587,6 @@ PRBool nsWindow::DispatchMouseEvent(PRUint32 aEventType)
   return result;
 }
 
-
 //-------------------------------------------------------------------------
 //
 // Deal with focus messages

widget/src/windows/nsWindow.h

@@ -132,6 +132,7 @@ protected:
                                         WPARAM wParam,
                                         LPARAM lParam);
     
+    PRBool DispatchEventToCallback(PRUint32 aEventType);
     static PRBool ConvertStatus(nsEventStatus aStatus);
 
 protected:

widget/tests/windows/winmain.cpp

@@ -47,6 +47,7 @@
 #include "nsFont.h"
 #include "nsRepository.h"
 #include "nsWidgetsCID.h"
+#include "nsITabWidget.h"
 
 #include <stdio.h>
 
@@ -66,6 +67,8 @@ nsIListBox    *gMultiListBox = NULL;
 
 nsIWidget     *movingWidget  = NULL;
 nsIScrollbar  *scrollbar     = NULL;
+nsITabWidget  *tabWidget     = NULL;
+
 
 char * gFailedMsg = NULL;
 
@@ -102,6 +105,9 @@ static NS_DEFINE_IID(kCVertScrollbarCID, NS_VERTSCROLLBAR_CID);
 static NS_DEFINE_IID(kCTextAreaCID, NS_TEXTAREA_CID);
 static NS_DEFINE_IID(kCTextFieldCID, NS_TEXTFIELD_CID);
 
+static NS_DEFINE_IID(kCTabWidgetCID, NS_TABWIDGET_CID);
+
+
 // interface ids
 static NS_DEFINE_IID(kIWidgetIID,         NS_IWIDGET_IID);
 static NS_DEFINE_IID(kIButtonIID,         NS_IBUTTON_IID);
@@ -114,6 +120,7 @@ static NS_DEFINE_IID(kIRadioGroupIID,     NS_IRADIOGROUP_IID);
 static NS_DEFINE_IID(kIListBoxIID,        NS_ILISTBOX_IID);
 static NS_DEFINE_IID(kIComboBoxIID,       NS_ICOMBOBOX_IID);
 static NS_DEFINE_IID(kIFileWidgetIID,     NS_IFILEWIDGET_IID);
+static NS_DEFINE_IID(kITabWidgetIID,      NS_ITABWIDGET_IID);
 
 
 char * eval(PRInt32 aVal) {
@@ -683,15 +690,15 @@ void DumpRects()
 
 
 /**--------------------------------------------------------------------------------
-  * Main Handler
-  *--------------------------------------------------------------------------------
+ * Main Handler
+ *--------------------------------------------------------------------------------
  */
 nsEventStatus PR_CALLBACK HandleEvent(nsGUIEvent *aEvent)
 { 
-	//printf("aEvent->message %d\n", aEvent->message);
+	//  printf("aEvent->message %d\n", aEvent->message);
     nsEventStatus result = nsEventStatus_eIgnore;
     switch(aEvent->message) {
-        
+
         case NS_MOUSE_ENTER:
             if (DEBUG_MOUSE) printf("NS_MOUSE_ENTER 0x%X\n", aEvent->widget);
             break;
@@ -742,6 +749,7 @@ nsEventStatus PR_CALLBACK HandleEvent(nsGUIEvent *aEvent)
 
             break;
 
+       
         case NS_SCROLLBAR_POS:
         case NS_SCROLLBAR_PAGE_NEXT:
         case NS_SCROLLBAR_PAGE_PREV:
@@ -816,6 +824,28 @@ nsEventStatus PR_CALLBACK HandleFileButtonEvent(nsGUIEvent *aEvent)
   return(nsEventStatus_eConsumeDoDefault);
 }
 
+/*--------------------------------------------------------------------------------
+ * Tab change handler
+ *--------------------------------------------------------------------------------
+ */
+
+nsEventStatus PR_CALLBACK HandleTabEvent(nsGUIEvent *aEvent)
+{
+  switch(aEvent->message) {
+           
+    case NS_TABCHANGE:
+      PRUint32 tab = tabWidget->GetSelectedTab();
+      char buf[256];
+      sprintf(buf, "Selected tab %d", tab);
+      statusText->SetText(buf);
+    break;
+  }
+
+  return(nsEventStatus_eConsumeDoDefault);
+}
+
+
+
 
 /**--------------------------------------------------------------------------------
   *
@@ -844,6 +874,7 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmd
     NSRepository::RegisterFactory(kCVertScrollbarCID, "raptorwidget.dll", PR_FALSE, PR_FALSE);
     NSRepository::RegisterFactory(kCTextAreaCID, "raptorwidget.dll", PR_FALSE, PR_FALSE);
     NSRepository::RegisterFactory(kCTextFieldCID, "raptorwidget.dll", PR_FALSE, PR_FALSE);
+    NSRepository::RegisterFactory(kCTabWidgetCID, "raptorwidget.dll", PR_FALSE, PR_FALSE);
 
     static NS_DEFINE_IID(kCRenderingContextIID, NS_RENDERING_CONTEXT_CID); 
     static NS_DEFINE_IID(kCDeviceContextIID, NS_DEVICE_CONTEXT_CID); 
@@ -1104,6 +1135,20 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmd
     y += rect.height + 5;
     x = 10;
 
+    //
+    // create a tab widget
+    //
+
+    rect.SetRect(x, y, 300, 50);  
+    NSRepository::CreateInstance(kCTabWidgetCID, nsnull, kITabWidgetIID, (LPVOID*)&tabWidget);
+    tabWidget->Create(window, rect, HandleTabEvent, NULL);
+    nsString tabs[] = {"low", "medium", "high" };
+   
+    tabWidget->SetTabs(3, tabs);
+    tabWidget->Show(PR_TRUE);
+    y += rect.height + 5;
+    x = 10;
+
     //
     // create a Radio Group
     //