Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/OutlinePick.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/OutlinePick.java
new file mode 100644 (file)
index 0000000..6a2222b
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/OutlinePick.java
@@ -0,0 +1,84 @@
+/*******************************************************************************\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.Shape;\r
+import java.awt.geom.AffineTransform;\r
+import java.awt.geom.NoninvertibleTransformException;\r
+import java.awt.geom.Rectangle2D;\r
+import java.util.List;\r
+\r
+import org.simantics.g2d.diagram.handler.PickRequest.PickPolicy;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.ElementHandler;\r
+import org.simantics.g2d.element.handler.Outline;\r
+import org.simantics.g2d.element.handler.Pick;\r
+import org.simantics.g2d.element.handler.Transform;\r
+import org.simantics.g2d.utils.GeometryUtils;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class OutlinePick implements Pick {\r
+\r
+    public static final ElementHandler INSTANCE         = new OutlinePick();\r
+\r
+    private static final long          serialVersionUID = 1L;\r
+\r
+    @Override\r
+    public boolean pickTest(IElement e, Shape s, PickPolicy policy) {\r
+        Rectangle2D pickArea = null;\r
+        if (s instanceof Rectangle2D)\r
+            pickArea = (Rectangle2D) s;\r
+        else\r
+            // FIXME: suboptimal, but works.\r
+            pickArea = s.getBounds2D();\r
+\r
+        // Pick with shape handler(s)\r
+        List<Outline> shapeHandlers = e.getElementClass().getItemsByClass(Outline.class);\r
+        if (!shapeHandlers.isEmpty()) {\r
+            // Convert pick shape to element coordinates\r
+            Transform t = e.getElementClass().getSingleItem(Transform.class);\r
+            AffineTransform canvasToElement = t.getTransform(e);\r
+            AffineTransform elementToCanvas;\r
+            try {\r
+                elementToCanvas = canvasToElement.createInverse();\r
+            } catch (NoninvertibleTransformException e1) {\r
+                throw new RuntimeException(e1);\r
+            }\r
+            Shape pickShapeInElementCoords = GeometryUtils.transformShape(pickArea, elementToCanvas);\r
+\r
+            // Intersection with one shape is enough\r
+            switch (policy) {\r
+                case PICK_INTERSECTING_OBJECTS: {\r
+                    for (Outline es : shapeHandlers) {\r
+                        Shape elementShape = es.getElementShape(e);\r
+                        if (elementShape == null)\r
+                            return false;\r
+                        if (GeometryUtils.intersects(pickShapeInElementCoords, elementShape))\r
+                            return true;\r
+                    }\r
+                    return false;\r
+                }\r
+                case PICK_CONTAINED_OBJECTS: {\r
+                    for (Outline es : shapeHandlers) {\r
+                        Shape elementShape = es.getElementShape(e);\r
+                        if (GeometryUtils.contains(pickShapeInElementCoords, elementShape))\r
+                            return true;\r
+                    }\r
+                    return false;\r
+                }\r
+            }\r
+        }\r
+        return false;\r
+    }\r
+}\r