Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.g2d / src / org / simantics / g2d / element / handler / impl / ElementParentTransform.java

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ElementParentTransform.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ElementParentTransform.java
new file mode 100644 (file)
index 0000000..010ffc0
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ElementParentTransform.java
@@ -0,0 +1,51 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.g2d.element.handler.impl;\r
+\r
+import java.awt.geom.AffineTransform;\r
+\r
+import org.simantics.g2d.element.ElementHints;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.ParentTransform;\r
+import org.simantics.g2d.element.handler.Transform;\r
+\r
+/**\r
+ * This class implements Transform, Move, Rotate, and Scale.\r
+ * It maintains element position in element variable ElementHints.KEY_TRANSFORM.\r
+ * \r
+ * @author Toni Kalajainen\r
+ */\r
+public class ElementParentTransform implements ParentTransform {\r
+\r
+    public static final ElementParentTransform INSTANCE = new ElementParentTransform();\r
+\r
+    private static final long serialVersionUID = 2381541967701117513L;\r
+\r
+       @Override\r
+       public AffineTransform getTransform(IElement e) {\r
+           \r
+           IElement parentElement = e.getHint(ElementHints.KEY_PARENT_ELEMENT);\r
+           if(parentElement == null) return null;\r
+           \r
+        Transform parentTransform = parentElement.getElementClass().getSingleItem(Transform.class);\r
+        assert(parentTransform!=null);\r
+        \r
+        AffineTransform result = parentTransform.getTransform(parentElement);\r
+        return result;\r
+        \r
+       }\r
+\r
+       public void setParent(IElement e, IElement parent) {\r
+               e.setHint(ElementHints.KEY_PARENT_ELEMENT, parent);\r
+       }\r
+\r
+}\r