Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / generic / datavgen.cpp

diff --git a/src/generic/datavgen.cpp b/src/generic/datavgen.cpp
index 631cfecd76b675b31af74c20bf828a14dc53d551..def4fb5877478b7f13170d42e6f05da2070d84ce 100644 (file)
--- a/src/generic/datavgen.cpp
+++ b/src/generic/datavgen.cpp
@@ -80,7 +80,22 @@ static const int EXPANDER_OFFSET = 1;
 // For the generic implementation, both the leaf nodes and the nodes are sorted for
 // fast search when needed
 static wxDataViewModel* g_model;
-static int g_column = -2;
+
+// The column is either the index of the column to be used for sorting or one
+// of the special values in this enum:
+enum
+{
+    // Sort when we're thawed later.
+    SortColumn_OnThaw = -3,
+
+    // Don't sort at all.
+    SortColumn_None = -2,
+
+    // Sort using the model default sort order.
+    SortColumn_Default = -1
+};
+
+static int g_column = SortColumn_None;
 static bool g_asending = true;
 
 // ----------------------------------------------------------------------------
@@ -581,16 +596,39 @@ public:
         UpdateDisplay();
     }
 
+    // Override the base class method to resort if needed, i.e. if
+    // SortPrepare() was called -- and ignored -- while we were frozen.
+    virtual void DoThaw()
+    {
+        if ( g_column == SortColumn_OnThaw )
+        {
+            Resort();
+            g_column = SortColumn_None;
+        }
+
+        wxWindow::DoThaw();
+    }
+
     void SortPrepare()
     {
         g_model = GetModel();
+
+        // Avoid sorting while the window is frozen, this allows to quickly add
+        // many items without resorting after each addition and only resort
+        // them all at once when the window is finally thawed, see above.
+        if ( IsFrozen() )
+        {
+            g_column = SortColumn_OnThaw;
+            return;
+        }
+
         wxDataViewColumn* col = GetOwner()->GetSortingColumn();
         if( !col )
         {
             if (g_model->HasDefaultCompare())
-                g_column = -1;
+                g_column = SortColumn_Default;
             else
-                g_column = -2;
+                g_column = SortColumn_None;
 
             g_asending = true;
             return;
@@ -4000,30 +4038,30 @@ void wxDataViewMainWindow::OnMouse( wxMouseEvent &event )
             le.SetItem( item );
             le.SetColumn( col->GetModelColumn() );
             le.SetDataViewColumn( col );
-
-            wxVariant value;
-            model->GetValue( value, item, col->GetModelColumn() );
-            le.SetValue(value);
         }
 
         parent->ProcessWindowEvent(le);
         return;
     }
 
-    if (!col)
+    // Check if we clicked outside the item area.
+    if ((current >= GetRowCount()) || !col)
     {
+        // Follow Windows convention here: clicking either left or right (but
+        // not middle) button clears the existing selection.
+        if (m_owner && (event.LeftDown() || event.RightDown()))
+        {
+            if (!GetSelections().empty())
+            {
+                m_owner->UnselectAll();
+                SendSelectionChangedEvent(wxDataViewItem());
+            }
+        }
         event.Skip();
         return;
     }
 
     wxDataViewRenderer *cell = col->GetRenderer();
-    if ((current >= GetRowCount()) || (x > GetEndOfLastCol()))
-    {
-        // Unselect all if below the last row ?
-        event.Skip();
-        return;
-    }
-
     wxDataViewColumn* const
         expander = GetExpanderColumnOrFirstOne(GetOwner());