X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/77ace0c533912e9cf2eeb459ff8e61758768cbcb..431a3edc641e379b8f5d6010220250017e99a3ff:/src/msw/listctrl.cpp?ds=sidebyside

diff --git a/src/msw/listctrl.cpp b/src/msw/listctrl.cpp
index cf1841b197..9d2fc92173 100644
--- a/src/msw/listctrl.cpp
+++ b/src/msw/listctrl.cpp
@@ -447,9 +447,17 @@ void wxListCtrl::UpdateStyle()
         // The new window view style
         DWORD dwStyleNew = MSWGetStyle(m_windowStyle, NULL);
 
+        // some styles are not returned by MSWGetStyle()
+        if ( IsShown() )
+            dwStyleNew |= WS_VISIBLE;
+
         // Get the current window style.
         DWORD dwStyleOld = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 
+        // we don't have wxVSCROLL style, but the list control may have it,
+        // don't change it then
+        dwStyleNew |= dwStyleOld & (WS_HSCROLL | WS_VSCROLL);
+
         // Only set the window style if the view bits have changed.
         if ( dwStyleOld != dwStyleNew )
         {
@@ -510,30 +518,25 @@ void wxListCtrl::SetSingleStyle(long style, bool add)
             flag = flag & ~wxLC_MASK_SORT;
     }
 
-    if ( flag & style )
-    {
-        if ( !add )
-            flag -= style;
-    }
+    if ( add )
+        flag |= style;
     else
-    {
-        if ( add )
-        {
-            flag |= style;
-        }
-    }
-
-    m_windowStyle = flag;
+        flag &= ~style;
 
-    UpdateStyle();
+    SetWindowStyleFlag(flag);
 }
 
 // Set the whole window style
 void wxListCtrl::SetWindowStyleFlag(long flag)
 {
-    m_windowStyle = flag;
+    if ( flag != m_windowStyle )
+    {
+        m_windowStyle = flag;
+
+        UpdateStyle();
 
-    UpdateStyle();
+        Refresh();
+    }
 }
 
 // ----------------------------------------------------------------------------
@@ -1257,7 +1260,6 @@ bool wxListCtrl::DeleteItem(long item)
 // Deletes all items
 bool wxListCtrl::DeleteAllItems()
 {
-    FreeAllInternalData();
     return ListView_DeleteAllItems(GetHwnd()) != 0;
 }
 
@@ -1769,20 +1771,15 @@ bool wxListCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                 break;
 
             case HDN_GETDISPINFOW:
-                {
-                    LPNMHDDISPINFOW info = (LPNMHDDISPINFOW) lParam;
-                    // This is a fix for a strange bug under XP.
-                    // Normally, info->iItem is a valid index, but
-                    // sometimes this is a silly (large) number
-                    // and when we return false via wxControl::MSWOnNotify
-                    // to indicate that it hasn't yet been processed,
-                    // there's a GPF in Windows.
-                    // By returning true here, we avoid further processing
-                    // of this strange message.
-                    if ( (unsigned)info->iItem >= (unsigned)GetColumnCount() )
-                        return true;
-                }
-                // fall through
+                // letting Windows XP handle this message results in mysterious
+                // crashes in comctl32.dll seemingly because of bad message
+                // parameters
+                //
+                // I have no idea what is the real cause of the bug (which is,
+                // just to make things interesting, is impossible to reproduce
+                // reliably) but ignoring all these messages does fix it and
+                // doesn't seem to have any negative consequences
+                return true;
 
             default:
                 return wxControl::MSWOnNotify(idCtrl, lParam, result);
@@ -2172,6 +2169,10 @@ bool wxListCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             // notifications - this makes deleting all items from a list ctrl
             // much faster
             *result = TRUE;
+
+            // also, we may free all user data now (couldn't do it before as
+            // the user should have access to it in OnDeleteAllItems() handler)
+            FreeAllInternalData();
             return true;
 
         case LVN_ENDLABELEDITA: