Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scenegraph / src / org / simantics / scenegraph / g2d / nodes / connection / RemoveLineAction.java

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/connection/RemoveLineAction.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/connection/RemoveLineAction.java
new file mode 100644 (file)
index 0000000..b497b86
--- /dev/null
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/nodes/connection/RemoveLineAction.java
@@ -0,0 +1,69 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
+ * 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.scenegraph.g2d.nodes.connection;\r
+\r
+import gnu.trove.map.hash.THashMap;\r
+\r
+import org.simantics.diagram.connection.RouteGraph;\r
+import org.simantics.diagram.connection.RouteLine;\r
+import org.simantics.diagram.connection.RouteTerminal;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class RemoveLineAction {\r
+\r
+    RouteGraph rg;\r
+    RouteGraph rgc;\r
+    RouteTerminal terminal;\r
+\r
+    public RemoveLineAction(RouteGraph rg, RouteGraph rgc, RouteTerminal terminal) {\r
+        this.rg = rg;\r
+        this.rgc = rgc;\r
+        this.terminal = terminal;\r
+    }\r
+\r
+    public RouteGraph getOriginalRouteGraph() {\r
+        return rg;\r
+    }\r
+\r
+    public RouteGraph getRouteGraph() {\r
+        return rgc;\r
+    }\r
+\r
+    /**\r
+     * @param rg\r
+     * @param l the route line to remove\r
+     * @param x\r
+     * @param y\r
+     * @return the performed action or <code>null</code> if no action to perform\r
+     */\r
+    public static RemoveLineAction perform(RouteGraph rg, RouteLine line, double x, double y) {\r
+        // Can't remove segments from connections that have only two terminals.\r
+        if (rg.isSimpleConnection() || rg.getTerminals().size() <= 2)\r
+            return null;\r
+\r
+        THashMap<Object, Object> map = new THashMap<Object, Object>();\r
+        RouteGraph rgc = rg.copy(map);\r
+        RouteLine lc = (RouteLine) map.get(line);\r
+\r
+        RouteTerminal terminal = lc.getTerminal();\r
+        if (terminal == null)\r
+            return null;\r
+\r
+        rgc.disconnect(terminal);\r
+        rgc.remove(terminal);\r
+\r
+        return new RemoveLineAction(rg, rgc, terminal);\r
+    }\r
+\r
+}\r