]> git.saurik.com Git - wxWidgets.git/blobdiff - src/gtk/toplevel.cpp
Make wxWindow::HasScrollbar() respect wxScrolled::ShowScrollbars().
[wxWidgets.git] / src / gtk / toplevel.cpp
index ca5a23190cca95895e6ebe5795f0a626674d2b55..9e2a4176f94abb4481ce305c98b401e63459592a 100644 (file)
@@ -2,7 +2,6 @@
 // Name:        src/gtk/toplevel.cpp
 // Purpose:
 // Author:      Robert Roebling
-// Id:          $Id$
 // Copyright:   (c) 1998 Robert Roebling
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
@@ -72,9 +71,14 @@ static wxTopLevelWindowGTK *g_lastActiveFrame = NULL;
 // send any activate events at all
 static int g_sendActivateEvent = -1;
 
+#ifdef GDK_WINDOWING_X11
 // Whether _NET_REQUEST_FRAME_EXTENTS support is working
-//   0 == not tested yet, 1 == working, 2 == broken
-static int gs_requestFrameExtentsStatus;
+static enum {
+    RFE_STATUS_UNKNOWN, RFE_STATUS_WORKING, RFE_STATUS_BROKEN
+} gs_requestFrameExtentsStatus;
+
+static bool gs_decorCacheValid;
+#endif
 
 //-----------------------------------------------------------------------------
 // RequestUserAttention related functions
@@ -208,6 +212,37 @@ gboolean gtk_frame_focus_out_callback(GtkWidget * WXUNUSED(widget),
 }
 }
 
+// ----------------------------------------------------------------------------
+// "key_press_event"
+// ----------------------------------------------------------------------------
+
+extern "C" {
+static gboolean
+wxgtk_tlw_key_press_event(GtkWidget *widget, GdkEventKey *event)
+{
+    GtkWindow* const window = GTK_WINDOW(widget);
+
+    // By default GTK+ checks for the menu accelerators in this (top level)
+    // window first and then propagates the event to the currently focused
+    // child from where it bubbles up the window parent chain. In wxWidgets,
+    // however, we want the child window to have the event first but still
+    // handle it as an accelerator if it's not processed there, so we need to
+    // customize this by reversing the order of the steps done in the standard
+    // GTK+ gtk_window_key_press_event() handler.
+
+    if ( gtk_window_propagate_key_event(window, event) )
+        return TRUE;
+
+    if ( gtk_window_activate_key(window, event) )
+        return TRUE;
+
+    if (GTK_WIDGET_GET_CLASS(widget)->key_press_event(widget, event))
+        return TRUE;
+
+    return FALSE;
+}
+}
+
 //-----------------------------------------------------------------------------
 // "size_allocate" from m_wxwindow
 //-----------------------------------------------------------------------------
@@ -216,16 +251,18 @@ extern "C" {
 static void
 size_allocate(GtkWidget*, GtkAllocation* alloc, wxTopLevelWindowGTK* win)
 {
-    if (win->m_oldClientWidth  != alloc->width ||
-        win->m_oldClientHeight != alloc->height)
+    win->m_useCachedClientSize = true;
+    if (win->m_clientWidth  != alloc->width ||
+        win->m_clientHeight != alloc->height)
     {
-        win->m_oldClientWidth  = alloc->width;
-        win->m_oldClientHeight = alloc->height;
+        win->m_clientWidth  = alloc->width;
+        win->m_clientHeight = alloc->height;
 
         GtkAllocation a;
         gtk_widget_get_allocation(win->m_widget, &a);
         wxSize size(a.width, a.height);
-        size += win->m_decorSize;
+        size.x += win->m_decorSize.left + win->m_decorSize.right;
+        size.y += win->m_decorSize.top + win->m_decorSize.bottom;
         win->m_width  = size.x;
         win->m_height = size.y;
 
@@ -265,24 +302,39 @@ gtk_frame_delete_callback( GtkWidget *WXUNUSED(widget),
 
 extern "C" {
 static gboolean
-gtk_frame_configure_callback( GtkWidget* widget,
-                              GdkEventConfigure *WXUNUSED(event),
+gtk_frame_configure_callback( GtkWidget*,
+                              GdkEventConfigure* gdk_event,
                               wxTopLevelWindowGTK *win )
 {
-    if (!win->m_hasVMT || !win->IsShown())
-        return FALSE;
+    win->GTKConfigureEvent(gdk_event->x, gdk_event->y);
+    return false;
+}
+}
 
+void wxTopLevelWindowGTK::GTKConfigureEvent(int x, int y)
+{
     wxPoint point;
-    gtk_window_get_position((GtkWindow*)widget, &point.x, &point.y);
-
-    win->m_x = point.x;
-    win->m_y = point.y;
-    wxMoveEvent mevent(point, win->GetId());
-    mevent.SetEventObject( win );
-    win->HandleWindowEvent( mevent );
+#ifdef GDK_WINDOWING_X11
+    if (gs_decorCacheValid)
+    {
+        const DecorSize& decorSize = GetCachedDecorSize();
+        point.x = x - decorSize.left;
+        point.y = y - decorSize.top;
+    }
+    else
+#endif
+    {
+        gtk_window_get_position(GTK_WINDOW(m_widget), &point.x, &point.y);
+    }
 
-    return FALSE;
-}
+    if (m_x != point.x || m_y != point.y)
+    {
+        m_x = point.x;
+        m_y = point.y;
+        wxMoveEvent event(point, GetId());
+        event.SetEventObject(this);
+        HandleWindowEvent(event);
+    }
 }
 
 //-----------------------------------------------------------------------------
@@ -301,14 +353,6 @@ void wxTopLevelWindowGTK::GTKHandleRealized()
     gdk_window_set_functions(gtk_widget_get_window(m_widget),
                                (GdkWMFunction)m_gdkFunc);
 
-    // GTK's shrinking/growing policy
-    if ( !(m_gdkFunc & GDK_FUNC_RESIZE) )
-        gtk_window_set_resizable(GTK_WINDOW(m_widget), FALSE);
-#ifndef __WXGTK3__
-    else
-        gtk_window_set_policy(GTK_WINDOW(m_widget), 1, 1, 1);
-#endif
-
     const wxIconBundle& icons = GetIcons();
     if (icons.GetIconCount())
         SetIcons(icons);
@@ -343,7 +387,8 @@ gtk_frame_map_callback( GtkWidget*,
         // tlw that was "rolled up" with some WMs.
         // Queue a resize rather than sending size event directly to allow
         // children to be made visible first.
-        win->m_oldClientWidth = 0;
+        win->m_useCachedClientSize = false;
+        win->m_clientWidth = 0;
         gtk_widget_queue_resize(win->m_wxwindow);
     }
     // it is possible for m_isShown to be false here, see bug #9909
@@ -377,11 +422,14 @@ gtk_frame_window_state_callback( GtkWidget* WXUNUSED(widget),
     // if maximized bit changed and it is now set
     if (event->changed_mask & event->new_window_state & GDK_WINDOW_STATE_MAXIMIZED)
     {
-        wxMaximizeEvent event(win->GetId());
-        event.SetEventObject(win);
-        win->HandleWindowEvent(event);
+        wxMaximizeEvent evt(win->GetId());
+        evt.SetEventObject(win);
+        win->HandleWindowEvent(evt);
     }
 
+    if (event->changed_mask & GDK_WINDOW_STATE_FULLSCREEN)
+        win->m_fsIsShowing = (event->new_window_state & GDK_WINDOW_STATE_FULLSCREEN) != 0;
+
     return false;
 }
 }
@@ -421,6 +469,7 @@ bool wxGetFrameExtents(GdkWindow* window, int* left, int* right, int* top, int*
 #endif
 }
 
+#ifdef GDK_WINDOWING_X11
 //-----------------------------------------------------------------------------
 // "property_notify_event" from m_widget
 //-----------------------------------------------------------------------------
@@ -436,15 +485,14 @@ static gboolean property_notify_event(
         if (win->m_netFrameExtentsTimerId)
         {
             // WM support for _NET_REQUEST_FRAME_EXTENTS is working
-            gs_requestFrameExtentsStatus = 1;
+            gs_requestFrameExtentsStatus = RFE_STATUS_WORKING;
             g_source_remove(win->m_netFrameExtentsTimerId);
             win->m_netFrameExtentsTimerId = 0;
         }
 
-        wxSize decorSize = win->m_decorSize;
-        int left, right, top, bottom;
-        if (wxGetFrameExtents(event->window, &left, &right, &top, &bottom))
-            decorSize.Set(left + right, top + bottom);
+        wxTopLevelWindowGTK::DecorSize decorSize = win->m_decorSize;
+        gs_decorCacheValid = wxGetFrameExtents(event->window,
+            &decorSize.left, &decorSize.right, &decorSize.top, &decorSize.bottom);
 
         win->GTKUpdateDecorSize(decorSize);
     }
@@ -456,19 +504,19 @@ extern "C" {
 static gboolean request_frame_extents_timeout(void* data)
 {
     // WM support for _NET_REQUEST_FRAME_EXTENTS is broken
-    gs_requestFrameExtentsStatus = 2;
+    gs_requestFrameExtentsStatus = RFE_STATUS_BROKEN;
     gdk_threads_enter();
     wxTopLevelWindowGTK* win = static_cast<wxTopLevelWindowGTK*>(data);
     win->m_netFrameExtentsTimerId = 0;
-    wxSize decorSize = win->m_decorSize;
-    int left, right, top, bottom;
-    if (wxGetFrameExtents(gtk_widget_get_window(win->m_widget), &left, &right, &top, &bottom))
-        decorSize.Set(left + right, top + bottom);
+    wxTopLevelWindowGTK::DecorSize decorSize = win->m_decorSize;
+    wxGetFrameExtents(gtk_widget_get_window(win->m_widget),
+        &decorSize.left, &decorSize.right, &decorSize.top, &decorSize.bottom);
     win->GTKUpdateDecorSize(decorSize);
     gdk_threads_leave();
     return false;
 }
 }
+#endif // GDK_WINDOWING_X11
 
 // ----------------------------------------------------------------------------
 // wxTopLevelWindowGTK creation
@@ -488,6 +536,7 @@ void wxTopLevelWindowGTK::Init()
     m_updateDecorSize = true;
     m_netFrameExtentsTimerId = 0;
     m_incWidth = m_incHeight = 0;
+    memset(&m_decorSize, 0, sizeof(m_decorSize));
 
     m_urgency_hint = -2;
 }
@@ -500,11 +549,7 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
                                   long style,
                                   const wxString &name )
 {
-    // always create a frame of some reasonable, even if arbitrary, size (at
-    // least for MSW compatibility)
-    wxSize size = sizeOrig;
-    size.x = WidthDefault(size.x);
-    size.y = HeightDefault(size.y);
+    const wxSize size(WidthDefault(sizeOrig.x), HeightDefault(sizeOrig.y));
 
     wxTopLevelWindows.Append( this );
 
@@ -593,7 +638,7 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
                       G_CALLBACK (gtk_frame_delete_callback), this);
 
     // m_mainWidget is a GtkVBox, holding the bars and client area (m_wxwindow)
-    m_mainWidget = gtk_vbox_new(false, 0);
+    m_mainWidget = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
     gtk_widget_show( m_mainWidget );
     gtk_widget_set_can_focus(m_mainWidget, false);
     gtk_container_add( GTK_CONTAINER(m_widget), m_mainWidget );
@@ -601,7 +646,7 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
     // m_wxwindow is the client area
     m_wxwindow = wxPizza::New();
     gtk_widget_show( m_wxwindow );
-    gtk_container_add( GTK_CONTAINER(m_mainWidget), m_wxwindow );
+    gtk_box_pack_start(GTK_BOX(m_mainWidget), m_wxwindow, true, true, 0);
 
     // we donm't allow the frame to get the focus as otherwise
     // the frame will grab it at arbitrary focus changes
@@ -615,7 +660,7 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
     PostCreation();
 
 #ifndef __WXGTK3__
-    if ((m_x != -1) || (m_y != -1))
+    if (pos != wxDefaultPosition)
         gtk_widget_set_uposition( m_widget, m_x, m_y );
 #endif
 
@@ -638,9 +683,21 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
     g_signal_connect_after (m_widget, "focus_out_event",
                       G_CALLBACK (gtk_frame_focus_out_callback), this);
 
-    gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
-    g_signal_connect(m_widget, "property_notify_event",
-        G_CALLBACK(property_notify_event), this);
+    // We need to customize the default GTK+ logic for key processing to make
+    // it conforming to wxWidgets event processing order.
+    g_signal_connect (m_widget, "key_press_event",
+                      G_CALLBACK (wxgtk_tlw_key_press_event), NULL);
+
+#ifdef GDK_WINDOWING_X11
+#ifdef __WXGTK3__
+    if (GDK_IS_X11_SCREEN(gtk_window_get_screen(GTK_WINDOW(m_widget))))
+#endif
+    {
+        gtk_widget_add_events(m_widget, GDK_PROPERTY_CHANGE_MASK);
+        g_signal_connect(m_widget, "property_notify_event",
+            G_CALLBACK(property_notify_event), this);
+    }
+#endif // GDK_WINDOWING_X11
 
     // translate wx decorations styles into Motif WM hints (they are recognized
     // by other WMs as well)
@@ -685,8 +742,12 @@ bool wxTopLevelWindowGTK::Create( wxWindow *parent,
         }
     }
 
-    // GTK sometimes chooses very small size if max size hint is not explicitly set
-    DoSetSizeHints(m_minWidth, m_minHeight, m_maxWidth, m_maxHeight, m_incWidth, m_incHeight);
+    if ((style & wxRESIZE_BORDER) == 0)
+        gtk_window_set_resizable(GTK_WINDOW(m_widget), false);
+#ifndef __WXGTK3__
+    else
+        gtk_window_set_policy(GTK_WINDOW(m_widget), 1, 1, 1);
+#endif
 
     m_decorSize = GetCachedDecorSize();
     int w, h;
@@ -854,37 +915,22 @@ bool wxTopLevelWindowGTK::Show( bool show )
 {
     wxASSERT_MSG( (m_widget != NULL), wxT("invalid frame") );
 
+#ifdef GDK_WINDOWING_X11
     bool deferShow = show && !m_isShown && m_deferShow;
     if (deferShow)
     {
-        deferShow = gs_requestFrameExtentsStatus != 2 &&
-            m_deferShowAllowed && !gtk_widget_get_realized(m_widget);
-        if (deferShow)
-        {
-            deferShow = g_signal_handler_find(m_widget,
+        deferShow = m_deferShowAllowed &&
+            gs_requestFrameExtentsStatus != RFE_STATUS_BROKEN &&
+            !gtk_widget_get_realized(m_widget) &&
+            g_signal_handler_find(m_widget,
                 GSignalMatchType(G_SIGNAL_MATCH_ID | G_SIGNAL_MATCH_DATA),
                 g_signal_lookup("property_notify_event", GTK_TYPE_WIDGET),
-                0, NULL, NULL, this) != 0;
-        }
-        GdkScreen* screen = NULL;
+                0, NULL, NULL, this);
         if (deferShow)
         {
-#ifdef GDK_WINDOWING_X11
-            screen = gtk_widget_get_screen(m_widget);
-#ifdef __WXGTK3__
-            if ( GDK_IS_X11_SCREEN(screen) )
-#endif
-            {
-                GdkAtom atom = gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false);
-                deferShow = gdk_x11_screen_supports_net_wm_hint(screen, atom) != 0;
-            }
-#ifdef __WXGTK3__
-            else
-#endif
-#endif // GDK/X11
-            {
-                deferShow = false;
-            }
+            GdkScreen* screen = gtk_widget_get_screen(m_widget);
+            GdkAtom atom = gdk_atom_intern("_NET_REQUEST_FRAME_EXTENTS", false);
+            deferShow = gdk_x11_screen_supports_net_wm_hint(screen, atom) != 0;
 
             // If _NET_REQUEST_FRAME_EXTENTS not supported, don't allow changes
             // to m_decorSize, it breaks saving/restoring window size with
@@ -923,7 +969,6 @@ bool wxTopLevelWindowGTK::Show( bool show )
             gtk_widget_set_allocation(m_widget, &alloc);
         }
 
-#ifdef GDK_WINDOWING_X11
         // send _NET_REQUEST_FRAME_EXTENTS
         XClientMessageEvent xevent;
         memset(&xevent, 0, sizeof(xevent));
@@ -938,9 +983,8 @@ bool wxTopLevelWindowGTK::Show( bool show )
         XSendEvent(display, DefaultRootWindow(display), false,
             SubstructureNotifyMask | SubstructureRedirectMask,
             (XEvent*)&xevent);
-#endif // GDK_WINDOWING_X11
 
-        if (gs_requestFrameExtentsStatus == 0)
+        if (gs_requestFrameExtentsStatus == RFE_STATUS_UNKNOWN)
         {
             // if WM does not respond to request within 1 second,
             // we assume support for _NET_REQUEST_FRAME_EXTENTS is not working
@@ -952,6 +996,7 @@ bool wxTopLevelWindowGTK::Show( bool show )
         m_isShown = true;
         return true;
     }
+#endif // GDK_WINDOWING_X11
 
     if (show && !gtk_widget_get_realized(m_widget))
     {
@@ -1002,7 +1047,8 @@ void wxTopLevelWindowGTK::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXU
 void wxTopLevelWindowGTK::GTKDoGetSize(int *width, int *height) const
 {
     wxSize size(m_width, m_height);
-    size -= m_decorSize;
+    size.x -= m_decorSize.left + m_decorSize.right;
+    size.y -= m_decorSize.top + m_decorSize.bottom;
     if (size.x < 0) size.x = 0;
     if (size.y < 0) size.y = 0;
 #if wxUSE_LIBHILDON2
@@ -1030,8 +1076,6 @@ void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int si
 {
     wxCHECK_RET( m_widget, wxT("invalid frame") );
 
-    m_deferShowAllowed = true;
-
     // deal with the position first
     int old_x = m_x;
     int old_y = m_y;
@@ -1053,6 +1097,9 @@ void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int si
     if ( m_x != old_x || m_y != old_y )
     {
         gtk_window_move( GTK_WINDOW(m_widget), m_x, m_y );
+        wxMoveEvent event(wxPoint(m_x, m_y), GetId());
+        event.SetEventObject(this);
+        HandleWindowEvent(event);
     }
 
     const wxSize oldSize(m_width, m_height);
@@ -1065,11 +1112,14 @@ void wxTopLevelWindowGTK::DoSetSize( int x, int y, int width, int height, int si
     if (m_height < 1) m_height = 1;
     if (m_width != oldSize.x || m_height != oldSize.y)
     {
+        m_deferShowAllowed = true;
+        m_useCachedClientSize = false;
+
         int w, h;
         GTKDoGetSize(&w, &h);
         gtk_window_resize(GTK_WINDOW(m_widget), w, h);
 
-        GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
+        DoGetClientSize(&m_clientWidth, &m_clientHeight);
         wxSizeEvent event(GetSize(), GetId());
         event.SetEventObject(this);
         HandleWindowEvent(event);
@@ -1099,6 +1149,8 @@ void wxTopLevelWindowGTK::DoGetClientSize( int *width, int *height ) const
         if ( height )
             *height = 0;
     }
+    else if (m_useCachedClientSize)
+        base_type::DoGetClientSize(width, height);
     else
     {
         GTKDoGetSize(width, height);
@@ -1123,19 +1175,21 @@ void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
     hints.min_height = 1;
     hints.max_width = INT_MAX;
     hints.max_height = INT_MAX;
-    if (minSize.x > m_decorSize.x)
-        hints.min_width = minSize.x - m_decorSize.x;
-    if (minSize.y > m_decorSize.y)
-        hints.min_height = minSize.y - m_decorSize.y;
+    const int decorSize_x = m_decorSize.left + m_decorSize.right;
+    const int decorSize_y = m_decorSize.top + m_decorSize.bottom;
+    if (minSize.x > decorSize_x)
+        hints.min_width = minSize.x - decorSize_x;
+    if (minSize.y > decorSize_y)
+        hints.min_height = minSize.y - decorSize_y;
     if (maxSize.x > 0)
     {
-        hints.max_width = maxSize.x - m_decorSize.x;
+        hints.max_width = maxSize.x - decorSize_x;
         if (hints.max_width < hints.min_width)
             hints.max_width = hints.min_width;
     }
     if (maxSize.y > 0)
     {
-        hints.max_height = maxSize.y - m_decorSize.y;
+        hints.max_height = maxSize.y - decorSize_y;
         if (hints.max_height < hints.min_height)
             hints.max_height = hints.min_height;
     }
@@ -1149,13 +1203,17 @@ void wxTopLevelWindowGTK::DoSetSizeHints( int minW, int minH,
         (GtkWindow*)m_widget, NULL, &hints, (GdkWindowHints)hints_mask);
 }
 
-void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
+#ifdef GDK_WINDOWING_X11
+void wxTopLevelWindowGTK::GTKUpdateDecorSize(const DecorSize& decorSize)
 {
     if (!IsMaximized() && !IsFullScreen())
         GetCachedDecorSize() = decorSize;
-    if (m_updateDecorSize && m_decorSize != decorSize)
+    if (m_updateDecorSize && memcmp(&m_decorSize, &decorSize, sizeof(DecorSize)))
     {
-        const wxSize diff = decorSize - m_decorSize;
+        m_useCachedClientSize = false;
+        const wxSize diff(
+            decorSize.left - m_decorSize.left + decorSize.right - m_decorSize.right,
+            decorSize.top - m_decorSize.top + decorSize.bottom - m_decorSize.bottom);
         m_decorSize = decorSize;
         bool resized = false;
         if (m_minWidth > 0 || m_minHeight > 0 || m_maxWidth > 0 || m_maxHeight > 0)
@@ -1169,7 +1227,8 @@ void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
             int w, h;
             GTKDoGetSize(&w, &h);
             // but not if size would be less than minimum, it won't take effect
-            if (w >= m_minWidth - decorSize.x && h >= m_minHeight - decorSize.y )
+            if (w >= m_minWidth - (decorSize.left + decorSize.right) &&
+                h >= m_minHeight - (decorSize.top + decorSize.bottom))
             {
                 gtk_window_resize(GTK_WINDOW(m_widget), w, h);
                 resized = true;
@@ -1182,7 +1241,7 @@ void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
             m_height += diff.y;
             if (m_width  < 1) m_width  = 1;
             if (m_height < 1) m_height = 1;
-            m_oldClientWidth = 0;
+            m_clientWidth = 0;
             gtk_widget_queue_resize(m_wxwindow);
         }
     }
@@ -1190,7 +1249,7 @@ void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
     {
         // gtk_widget_show() was deferred, do it now
         m_deferShow = false;
-        GetClientSize(&m_oldClientWidth, &m_oldClientHeight);
+        DoGetClientSize(&m_clientWidth, &m_clientHeight);
         wxSizeEvent sizeEvent(GetSize(), GetId());
         sizeEvent.SetEventObject(this);
         HandleWindowEvent(sizeEvent);
@@ -1202,10 +1261,11 @@ void wxTopLevelWindowGTK::GTKUpdateDecorSize(const wxSize& decorSize)
         HandleWindowEvent(showEvent);
     }
 }
+#endif // GDK_WINDOWING_X11
 
-wxSize& wxTopLevelWindowGTK::GetCachedDecorSize()
+wxTopLevelWindowGTK::DecorSize& wxTopLevelWindowGTK::GetCachedDecorSize()
 {
-    static wxSize size[8];
+    static DecorSize size[8];
 
     int index = 0;
     // title bar