Crash fix for when a wxNullBitmap is passed in as the bitmap to use.

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

diff --git a/src/msw/listctrl.cpp b/src/msw/listctrl.cpp
index 4e2c3de06887bd0b9828507e98c9804d0ab09897..79dc6b1c50bcfd8dae333feddd17b9453e8eeb16 100644 (file)
--- a/src/msw/listctrl.cpp
+++ b/src/msw/listctrl.cpp
@@ -91,7 +91,9 @@ namespace
 // 4.3+
 //
 // this function does no error checking on item and subitem parameters, notice
-// that subitem is 0 for whole item or 1-based for the individual columns
+// that subitem 0 means the whole item so there is no way to retrieve the
+// rectangle of the first subitem using this function, in particular notice
+// that the index is *not* 1-based, in spite of what MSDN says
 inline bool
 wxGetListCtrlSubItemRect(HWND hwnd, int item, int subitem, int flags, RECT& rect)
 {
@@ -185,7 +187,7 @@ private:
     LV_ITEM_NATIVE *m_pItem;
     LV_ITEM_NATIVE m_item;
 
-    DECLARE_NO_COPY_CLASS(wxLV_ITEM)
+    wxDECLARE_NO_COPY_CLASS(wxLV_ITEM);
 };
 
 ///////////////////////////////////////////////////////
@@ -233,7 +235,7 @@ public:
            delete attr;
    }
 
-    DECLARE_NO_COPY_CLASS(wxListItemInternalData)
+    wxDECLARE_NO_COPY_CLASS(wxListItemInternalData);
 };
 
 // Get the internal data structure
@@ -1151,19 +1153,6 @@ bool wxListCtrl::GetItemRect(long item, wxRect& rect, int code) const
     return GetSubItemRect( item, wxLIST_GETSUBITEMRECT_WHOLEITEM, rect, code) ;
 }
 
-/*!
- * Retrieve coordinates and size of a specified subitem of a listview control.
- * This function only works if the listview control is in the report mode.
- *
- * @param item : Item number
- * @param subItem : Subitem or column number, use -1 for the whole row including
- *                  all columns or subitems
- * @param rect : A pointer to an allocated wxRect object
- * @param code : Specify the part of the subitem coordinates you need. Choices are
- *               wxLIST_RECT_BOUNDS, wxLIST_RECT_ICON, wxLIST_RECT_LABEL
- *
- * @return bool  : True if successful.
- */
 bool wxListCtrl::GetSubItemRect(long item, long subItem, wxRect& rect, int code) const
 {
     // ListView_GetSubItemRect() doesn't do subItem error checking and returns
@@ -1173,6 +1162,10 @@ bool wxListCtrl::GetSubItemRect(long item, long subItem, wxRect& rect, int code)
                     (subItem >= 0 && subItem < GetColumnCount()),
                  false, _T("invalid sub item index") );
 
+    // use wxCHECK_MSG against "item" too, for coherency with the generic implementation:
+    wxCHECK_MSG( item >= 0 && item < GetItemCount(), false,
+                 _T("invalid item in GetSubItemRect") );
+
     int codeWin;
     if ( code == wxLIST_RECT_BOUNDS )
         codeWin = LVIR_BOUNDS;
@@ -1201,9 +1194,11 @@ bool wxListCtrl::GetSubItemRect(long item, long subItem, wxRect& rect, int code)
 
     wxCopyRECTToRect(rectWin, rect);
 
-    // for the first sub item, i.e. the main item itself, the returned rect is
-    // the whole line one, we need to truncate it at first column ourselves
-    rect.width = GetColumnWidth(0);
+    // there is no way to retrieve the first sub item bounding rectangle using
+    // wxGetListCtrlSubItemRect() as 0 means the whole item, so we need to
+    // truncate it at first column ourselves
+    if ( subItem == 0 )
+        rect.width = GetColumnWidth(0);
 
     return true;
 }
@@ -2486,7 +2481,7 @@ bool wxListCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                     if ( lvi.mask & LVIF_TEXT )
                     {
                         wxString text = OnGetItemText(item, lvi.iSubItem);
-                        wxStrlcpy(lvi.pszText, text, lvi.cchTextMax);
+                        wxStrlcpy(lvi.pszText, text.c_str(), lvi.cchTextMax);
                     }
 
                     // see comment at the end of wxListCtrl::GetColumn()
@@ -2826,14 +2821,22 @@ WXLPARAM wxListCtrl::OnCustomDraw(WXLPARAM lParam)
             break;
 
         case CDDS_ITEMPREPAINT:
+            // get a message for each subitem
+            return CDRF_NOTIFYITEMDRAW;
+
+        case CDDS_SUBITEM | CDDS_ITEMPREPAINT:
             const int item = nmcd.dwItemSpec;
+            const int column = pLVCD->iSubItem;
 
             // we get this message with item == 0 for an empty control, we
             // must ignore it as calling OnGetItemAttr() would be wrong
             if ( item < 0 || item >= GetItemCount() )
                 break;
+            // same for columns
+            if ( column < 0 || column >= GetColumnCount() )
+                break;
 
-            return HandleItemPrepaint(this, pLVCD, DoGetItemAttr(item));
+            return HandleItemPrepaint(this, pLVCD, DoGetItemColumnAttr(item, column));
     }
 
     return CDRF_DODEFAULT;
@@ -2995,9 +2998,9 @@ wxListItemAttr *wxListCtrl::OnGetItemAttr(long WXUNUSED_UNLESS_DEBUG(item)) cons
     return NULL;
 }
 
-wxListItemAttr *wxListCtrl::DoGetItemAttr(long item) const
+wxListItemAttr *wxListCtrl::DoGetItemColumnAttr(long item, long column) const
 {
-    return IsVirtual() ? OnGetItemAttr(item)
+    return IsVirtual() ? OnGetItemColumnAttr(item, column)
                        : wxGetInternalDataAttr(this, item);
 }