don't crash when trying to dump struct members which are NULL pointers

[wxWidgets.git] / src / msw / mdi.cpp

diff --git a/src/msw/mdi.cpp b/src/msw/mdi.cpp
index 210013f15f58f2397305f7729eb7ab73d8d915b6..5a3fcf83af344e15adbd389158448d15819bdd9e 100644 (file)
--- a/src/msw/mdi.cpp
+++ b/src/msw/mdi.cpp
@@ -6,7 +6,7 @@
 // Created:     04/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) Julian Smart
-// Licence:     wxWidgets licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // ===========================================================================
@@ -203,7 +203,7 @@ bool wxMDIParentFrame::Create(wxWindow *parent,
   if ( parent )
       parent->AddChild(this);
 
-  if ( id > -1 )
+  if ( id != wxID_ANY )
     m_windowId = id;
   else
     m_windowId = NewControlId();
@@ -234,7 +234,9 @@ wxMDIParentFrame::~wxMDIParentFrame()
 #if wxUSE_TOOLBAR
     m_frameToolBar = NULL;
 #endif
+#if wxUSE_STATUSBAR
     m_frameStatusBar = NULL;
+#endif // wxUSE_STATUSBAR
 
     DestroyChildren();
 
@@ -298,6 +300,34 @@ void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
     }
 }
 
+void wxMDIParentFrame::DoMenuUpdates(wxMenu* menu)
+{
+    wxMDIChildFrame *child = GetActiveChild();
+    if ( child )
+    {
+        wxEvtHandler* source = child->GetEventHandler();
+        wxMenuBar* bar = child->GetMenuBar();
+
+        if (menu)
+        {
+            menu->UpdateUI(source);
+        }
+        else
+        {
+            if ( bar != NULL )
+            {
+                int nCount = bar->GetMenuCount();
+                for (int n = 0; n < nCount; n++)
+                bar->GetMenu(n)->UpdateUI(source);
+            }
+        }
+    }
+    else
+    {
+        wxFrameBase::DoMenuUpdates(menu);
+    }
+}
+
 void wxMDIParentFrame::OnSize(wxSizeEvent&)
 {
     if ( GetClientWindow() )
@@ -354,10 +384,14 @@ void wxMDIParentFrame::Cascade()
     ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDICASCADE, 0, 0);
 }
 
-// TODO: add a direction argument (hor/vert)
-void wxMDIParentFrame::Tile()
+void wxMDIParentFrame::Tile(wxOrientation orient)
 {
-    ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE, MDITILE_HORIZONTAL, 0);
+    wxASSERT_MSG( orient == wxHORIZONTAL || orient == wxVERTICAL,
+                  _T("invalid orientation value") );
+
+    ::SendMessage(GetWinHwnd(GetClientWindow()), WM_MDITILE,
+                  orient == wxHORIZONTAL ? MDITILE_HORIZONTAL
+                                         : MDITILE_VERTICAL, 0);
 }
 
 void wxMDIParentFrame::ArrangeIcons()
@@ -456,9 +490,8 @@ WXLRESULT wxMDIParentFrame::MSWWindowProc(WXUINT message,
             break;
 
         case WM_SIZE:
-            // as we don't (usually) resize the MDI client to exactly fit the
-            // client area (we put it below the toolbar, above statusbar &c),
-            // we should not pass this one to DefFrameProc
+            // though we don't (usually) resize the MDI client to exactly fit the
+            // client area we need to pass this one to DefFrameProc to allow the children to show
             break;
     }
 
@@ -640,6 +673,7 @@ bool wxMDIParentFrame::MSWTranslateMessage(WXMSG* msg)
 void wxMDIChildFrame::Init()
 {
     m_needsResize = true;
+    m_needsInitialShow = true;
 }
 
 bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
@@ -651,9 +685,8 @@ bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
                              const wxString& name)
 {
   SetName(name);
-  wxWindowBase::Show(true); // MDI child frame starts off shown
 
-  if ( id > -1 )
+  if ( id != wxID_ANY )
     m_windowId = id;
   else
     m_windowId = (int)NewControlId();
@@ -675,27 +708,27 @@ bool wxMDIChildFrame::Create(wxMDIParentFrame *parent,
                     : wxMDIChildFrameClassNameNoRedraw;
   mcs.szTitle = title;
   mcs.hOwner = wxGetInstance();
-  if (x > -1)
+  if (x != wxDefaultCoord)
       mcs.x = x;
   else
       mcs.x = CW_USEDEFAULT;
 
-  if (y > -1)
+  if (y != wxDefaultCoord)
       mcs.y = y;
   else
       mcs.y = CW_USEDEFAULT;
 
-  if (width > -1)
+  if (width != wxDefaultCoord)
       mcs.cx = width;
   else
       mcs.cx = CW_USEDEFAULT;
 
-  if (height > -1)
+  if (height != wxDefaultCoord)
       mcs.cy = height;
   else
       mcs.cy = CW_USEDEFAULT;
 
-  DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN | WS_VISIBLE ;
+  DWORD msflags = WS_OVERLAPPED | WS_CLIPCHILDREN;
   if (style & wxMINIMIZE_BOX)
     msflags |= WS_MINIMIZEBOX;
   if (style & wxMAXIMIZE_BOX)
@@ -732,7 +765,9 @@ wxMDIChildFrame::~wxMDIChildFrame()
 #if wxUSE_TOOLBAR
     m_frameToolBar = NULL;
 #endif
+#if wxUSE_STATUSBAR
     m_frameStatusBar = NULL;
+#endif // wxUSE_STATUSBAR
 
     DestroyChildren();
 
@@ -741,6 +776,12 @@ wxMDIChildFrame::~wxMDIChildFrame()
     MSWDestroyWindow();
 }
 
+bool wxMDIChildFrame::Show(bool show)
+{
+    m_needsInitialShow = false;
+    return wxFrame::Show(show);
+}
+
 // Set the client size (i.e. leave the calculation of borders etc.
 // to wxWidgets)
 void wxMDIChildFrame::DoSetClientSize(int width, int height)
@@ -759,12 +800,14 @@ void wxMDIChildFrame::DoSetClientSize(int width, int height)
   int actual_width = rect2.right - rect2.left - rect.right + width;
   int actual_height = rect2.bottom - rect2.top - rect.bottom + height;
 
+#if wxUSE_STATUSBAR
   if (GetStatusBar() && GetStatusBar()->IsShown())
   {
     int sx, sy;
     GetStatusBar()->GetSize(&sx, &sy);
     actual_height += sy;
   }
+#endif // wxUSE_STATUSBAR
 
   POINT point;
   point.x = rect2.left;
@@ -777,7 +820,8 @@ void wxMDIChildFrame::DoSetClientSize(int width, int height)
 
   MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);
 
-  wxSizeEvent event(wxSize(width, height), m_windowId);
+  wxSize size(width, height);
+  wxSizeEvent event(size, m_windowId);
   event.SetEventObject( this );
   GetEventHandler()->ProcessEvent(event);
 }
@@ -1269,6 +1313,16 @@ void wxMDIClientWindow::DoSetSize(int x, int y, int width, int height, int sizeF
 
 void wxMDIChildFrame::OnIdle(wxIdleEvent& event)
 {
+    // wxMSW prior to 2.5.3 created MDI child frames as visible, which resulted
+    // in flicker e.g. when the frame contained controls with non-trivial
+    // layout. Since 2.5.3, the frame is created hidden as all other top level
+    // windows. In order to maintain backward compatibility, the frame is shown
+    // in OnIdle, unless Show(false) was called by the programmer before.
+    if ( m_needsInitialShow )
+    {
+        Show(true);
+    }
+
     // MDI child frames get their WM_SIZE when they're constructed but at this
     // moment they don't have any children yet so all child windows will be
     // positioned incorrectly when they are added later - to fix this, we