avoid assert in DoGetBestSize() for an empty tree

[wxWidgets.git] / src / common / rgncmn.cpp

diff --git a/src/common/rgncmn.cpp b/src/common/rgncmn.cpp
index 8b6530c78d1c2a2d305ba68b8cd5fe24e8eb4873..a18bb207082b0fedc671ca37353b04ec63daec13 100644 (file)
--- a/src/common/rgncmn.cpp
+++ b/src/common/rgncmn.cpp
@@ -157,3 +157,36 @@ bool wxRegionBase::Union(const wxBitmap& bmp,
 }
 
 #endif // wxUSE_IMAGE
+
+#ifdef wxHAS_REGION_COMBINE
+// ============================================================================
+// wxRegionWithCombine
+// ============================================================================
+
+// implement some wxRegionBase pure virtuals in terms of Combine()
+bool wxRegionWithCombine::DoUnionWithRect(const wxRect& rect)
+{
+    return Combine(rect, wxRGN_OR);
+}
+
+bool wxRegionWithCombine::DoUnionWithRegion(const wxRegion& region)
+{
+    return DoCombine(region, wxRGN_OR);
+}
+
+bool wxRegionWithCombine::DoIntersect(const wxRegion& region)
+{
+    return DoCombine(region, wxRGN_AND);
+}
+
+bool wxRegionWithCombine::DoSubtract(const wxRegion& region)
+{
+    return DoCombine(region, wxRGN_DIFF);
+}
+
+bool wxRegionWithCombine::DoXor(const wxRegion& region)
+{
+    return DoCombine(region, wxRGN_XOR);
+}
+
+#endif // wxHAS_REGION_COMBINE