Add a generic Qt::Edge enum

The values are Top/Left/Right/BottomEdge and values
specified so that it can be extended as flags later.

Change-Id: I67482265e14d89942a8f59bf09e9e3fadab8243f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>

src/corelib/global/qnamespace.h

@@ -63,7 +63,7 @@ Qt {
     Q_ENUMS(ScrollBarPolicy FocusPolicy ContextMenuPolicy)
     Q_ENUMS(ArrowType ToolButtonStyle PenStyle PenCapStyle PenJoinStyle BrushStyle)
     Q_ENUMS(FillRule MaskMode BGMode ClipOperation SizeMode)
-    Q_ENUMS(Axis Corner LayoutDirection SizeHint Orientation DropAction)
+    Q_ENUMS(Axis Corner Edge LayoutDirection SizeHint Orientation DropAction)
     Q_FLAGS(Alignment Orientations DropActions)
     Q_FLAGS(DockWidgetAreas ToolBarAreas)
     Q_ENUMS(DockWidgetArea ToolBarArea)
@@ -1202,6 +1202,13 @@ public:
         BottomRightCorner = 0x00003
     };
 
+    enum Edge {
+        TopEdge = 0x00001,
+        LeftEdge = 0x00002,
+        RightEdge = 0x00004,
+        BottomEdge = 0x00008
+    };
+
     enum ConnectionType {
         AutoConnection,
         DirectConnection,

src/corelib/global/qnamespace.qdoc

@@ -1709,6 +1709,17 @@
     \value BottomRightCorner The bottom-right corner of the rectangle.
 */
 
+/*!
+    \enum Qt::Edge
+
+    This enum type specifies an edge in a rectangle:
+
+    \value TopEdge    The top edge of the rectangle.
+    \value LeftEdge   The left edge of the rectangle.
+    \value RightEdge  The right edge of the rectangle.
+    \value BottomEdge The bottom edge of the rectangle.
+*/
+
 /*!
     \enum Qt::ScrollBarPolicy