Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ShapePick.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ShapePick.java
new file mode 100644 (file)
index 0000000..f61630a
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/element/handler/impl/ShapePick.java
@@ -0,0 +1,65 @@
+/*******************************************************************************\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.PathIterator;\r
+import java.awt.geom.Rectangle2D;\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+\r
+import org.simantics.g2d.diagram.handler.PickRequest.PickPolicy;\r
+import org.simantics.g2d.element.ElementUtils;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.Pick;\r
+import org.simantics.g2d.utils.PathUtils;\r
+\r
+public class ShapePick implements Pick {\r
+\r
+    public final static ShapePick INSTANCE = new ShapePick();\r
+\r
+    private static final long serialVersionUID = 1L;\r
+\r
+    @Override\r
+    public boolean pickTest(IElement e, Shape s, PickPolicy policy) {\r
+        Rectangle2D pickRect = null;\r
+        if (s instanceof Rectangle2D)\r
+            pickRect = (Rectangle2D) s;\r
+        else\r
+            // FIXME: suboptimal, but works.\r
+            pickRect = s.getBounds2D();\r
+\r
+        Shape es = ElementUtils.getElementShapeOrBounds(e);\r
+        PathIterator iter = es.getPathIterator(null);\r
+        Collection<double[]> segments = new ArrayList<double[]>();\r
+        PathUtils.toLineSegments(iter, segments);\r
+\r
+        switch (policy) {\r
+            case PICK_CONTAINED_OBJECTS:\r
+                for (double[] seg : segments) {\r
+                    if (!pickRect.contains(seg[0], seg[1]) || !pickRect.contains(seg[2], seg[3]))\r
+                        return false;\r
+                }\r
+                return true;\r
+\r
+            case PICK_INTERSECTING_OBJECTS:\r
+                for (double[] seg : segments) {\r
+                    if (pickRect.intersectsLine(seg[0], seg[1], seg[2], seg[3]))\r
+                        return true;\r
+                }\r
+                return false;\r
+        }\r
+\r
+        return false;\r
+    }\r
+\r
+}\r