guard against nullptr

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

diff --git a/src/msw/statusbar.cpp b/src/msw/statusbar.cpp
index a6b42bac5a47f15e4b5655b6b3a6765b6a641695..e694abf2474e332d483d50ad562cb08d5009278f 100644 (file)
--- a/src/msw/statusbar.cpp
+++ b/src/msw/statusbar.cpp
@@ -89,7 +89,7 @@ WXDWORD wxStatusBar::MSWGetStyle(long style, WXDWORD *exstyle) const
     WXDWORD msStyle = wxStatusBarBase::MSWGetStyle(style, exstyle);
 
     // wxSTB_SIZEGRIP is part of our default style but it doesn't make sense to
-    // show size grip if this is the status bar of a non-resizeable TLW so turn
+    // show size grip if this is the status bar of a non-resizable TLW so turn
     // it off in such case
     wxWindow * const parent = GetParent();
     wxCHECK_MSG( parent, msStyle, wxS("Status bar must have a parent") );
@@ -103,14 +103,14 @@ WXDWORD wxStatusBar::MSWGetStyle(long style, WXDWORD *exstyle) const
     // is not given
     if ( !(style & wxSTB_SIZEGRIP) )
     {
-        *exstyle |= CCS_TOP;
+        msStyle |= CCS_TOP;
     }
     else
     {
 #ifndef __WXWINCE__
         // may be some versions of comctl32.dll do need it - anyhow, it won't
         // do any harm
-        *exstyle |= SBARS_SIZEGRIP;
+       msStyle |= SBARS_SIZEGRIP;
 #endif
     }
 
@@ -213,8 +213,11 @@ void wxStatusBar::MSWUpdateFieldsWidths()
     widthAvailable -= extraWidth*(count - 1);   // extra space between fields
     widthAvailable -= MSWGetMetrics().textMargin;   // and for the last field
 
-    if ( HasFlag(wxSTB_SIZEGRIP) )
-        widthAvailable -= MSWGetMetrics().gripWidth;
+    // Deal with the grip: we shouldn't overflow onto the space occupied by it
+    // so the effectively available space is smaller.
+    const int gripWidth = HasFlag(wxSTB_SIZEGRIP) ? MSWGetMetrics().gripWidth
+                                                  : 0;
+    widthAvailable -= gripWidth;
 
     // distribute the available space (client width) among the various fields:
 
@@ -232,6 +235,11 @@ void wxStatusBar::MSWUpdateFieldsWidths()
         pWidths[i] = nCurPos;
     }
 
+    // The total width of the panes passed to Windows must be equal to the
+    // total width available, including the grip. Otherwise we get an extra
+    // separator line just before it.
+    pWidths[count - 1] += gripWidth;
+
     if ( !StatusBar_SetParts(GetHwnd(), count, pWidths) )
     {
         wxLogLastError("StatusBar_SetParts");
@@ -429,14 +437,6 @@ bool wxStatusBar::GetFieldRect(int i, wxRect& rect) const
 
     wxCopyRECTToRect(r, rect);
 
-    // Windows seems to under-report the size of the last field rectangle,
-    // presumably in order to prevent the buggy applications from overflowing
-    // onto the size grip but we want to return the real size to wx users
-    if ( HasFlag(wxSTB_SIZEGRIP) && i == (int)m_panes.GetCount() - 1 )
-    {
-        rect.width += MSWGetMetrics().gripWidth - MSWGetBorderWidth();
-    }
-
     return true;
 }
 
@@ -502,9 +502,6 @@ void wxStatusBar::DoMoveWindow(int x, int y, int width, int height)
                        );
     }
 
-    // adjust fields widths to the new size
-    MSWUpdateFieldsWidths();
-
     // we have to trigger wxSizeEvent if there are children window in status
     // bar because GetFieldRect returned incorrect (not updated) values up to
     // here, which almost certainly resulted in incorrectly redrawn statusbar
@@ -595,15 +592,21 @@ wxStatusBar::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
     }
 #endif
 
-    bool needsEllipsization = HasFlag(wxSTB_ELLIPSIZE_START) ||
-                              HasFlag(wxSTB_ELLIPSIZE_MIDDLE) ||
-                              HasFlag(wxSTB_ELLIPSIZE_END);
-    if ( nMsg == WM_SIZE && needsEllipsization )
+    if ( nMsg == WM_SIZE )
     {
-        for (int i=0; i<GetFieldsCount(); i++)
-            DoUpdateStatusText(i);
-            // re-set the field text, in case we need to ellipsize
-            // (or de-ellipsize) some parts of it
+        MSWUpdateFieldsWidths();
+
+        if ( HasFlag(wxSTB_ELLIPSIZE_START) ||
+                HasFlag(wxSTB_ELLIPSIZE_MIDDLE) ||
+                    HasFlag(wxSTB_ELLIPSIZE_END) )
+        {
+            for (int i=0; i<GetFieldsCount(); i++)
+            {
+                // re-set the field text, in case we need to ellipsize
+                // (or de-ellipsize) some parts of it
+                DoUpdateStatusText(i);
+            }
+        }
     }
 
     return wxStatusBarBase::MSWWindowProc(nMsg, wParam, lParam);