Diagram editor : add 4 tools for edit the depth (Z value) of items.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5394 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qet.h

@@ -30,6 +30,14 @@ namespace QET {
 	const QString displayedVersion = "0.70-dev";
 	QString license();
 	
+		/// List the various kind of changes for the zValue
+	enum DepthOption {
+		BringForward, ///< Bring item to the foreground so they have the highest zValue
+		Raise,        ///< Raise item one layer above their current one; zValues are incremented
+		Lower,        ///< Send item one layer below their current one; zValues are decremented
+		SendBackward  ///< Send item to the background so they have the lowest zValue
+	};
+	
 	/// Oriented movements
 	enum OrientedMovement {
 		ToNorth,
@@ -165,6 +173,8 @@ namespace QET {
 	bool eachStrIsEqual (const QStringList &qsl);
 }
 
+Q_DECLARE_METATYPE(QET::DepthOption)
+
 class Qet : public QObject {
 	Q_OBJECT
 	public: