[winforms] Cope with small windows

mono · Dec 11, 2010 · 6a0140e · 6a0140e
1 parent 986e5a1
commit 6a0140e
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ListView.cs b/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ListView.cs
@@ -1477,16 +1477,17 @@ private void CalculateScrollBars ()
 				// v_scroll to account for the height of h_scroll
 				if (h_scroll.Visible) {
 					v_scroll.Maximum = layout_ht + h_scroll.Height;
-					v_scroll.Height = client_area.Height - h_scroll.Height;
+					v_scroll.Height = client_area.Height > h_scroll.Height ? client_area.Height - h_scroll.Height : 0;
 				} else {
 					v_scroll.Maximum = layout_ht;
 					v_scroll.Height = client_area.Height;
 				}
 
 				if (view == View.Details) {
 					// Need to update Maximum if using LargeChange with value other than the visible area
-					v_scroll.LargeChange = v_scroll.Height - (header_control.Height + item_size.Height);
-					v_scroll.Maximum -= header_control.Height + item_size.Height;
+					int headerPlusOneItem = header_control.Height + item_size.Height;
+					v_scroll.LargeChange = v_scroll.Height > headerPlusOneItem ? v_scroll.Height - headerPlusOneItem : 0;
+					v_scroll.Maximum = v_scroll.Maximum > headerPlusOneItem ? v_scroll.Maximum - headerPlusOneItem : 0;
 				} else
 					v_scroll.LargeChange = v_scroll.Height;