Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/Rotateable.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/Rotateable.java
new file mode 100644 (file)
index 0000000..92c8c9a
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/Rotateable.java
@@ -0,0 +1,47 @@
+/*******************************************************************************\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
+import java.awt.geom.Point2D;\r
+\r
+import org.simantics.g2d.element.ElementHints;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.Rotate;\r
+\r
+/**\r
+ * @author Toni Kalajainen\r
+ */\r
+public class Rotateable implements Rotate {\r
+\r
+    private static final long serialVersionUID = -1218542543108449939L;\r
+\r
+    public static final Rotateable HANDLER = new Rotateable();\r
+\r
+    @Override\r
+    public void rotate(IElement e, double theta, Point2D origo) {\r
+        if (Double.isNaN(theta)) return;\r
+        AffineTransform at = e.getHint(ElementHints.KEY_TRANSFORM);\r
+        at = (AffineTransform) at.clone();\r
+        at.rotate(theta, origo.getX(), origo.getY());\r
+        e.setHint(ElementHints.KEY_TRANSFORM, at);\r
+    }\r
+\r
+    @Override\r
+    public double getAngle(IElement e) {\r
+        AffineTransform at = e.getHint(ElementHints.KEY_TRANSFORM);\r
+        double m01 = at.getShearX();\r
+        double m11 = at.getScaleY();\r
+        return -Math.atan2(m01, m11);\r
+    }\r
+\r
+}\r