Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / handler / e4 / CanvasCommandDelegate.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/e4/CanvasCommandDelegate.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/e4/CanvasCommandDelegate.java
new file mode 100644 (file)
index 0000000..0e7e7dd
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/e4/CanvasCommandDelegate.java
@@ -0,0 +1,92 @@
+/*******************************************************************************\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.diagram.handler.e4;\r
+\r
+import javax.inject.Named;\r
+\r
+import org.eclipse.core.runtime.IAdaptable;\r
+import org.eclipse.e4.core.di.annotations.CanExecute;\r
+import org.eclipse.e4.core.di.annotations.Execute;\r
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;\r
+import org.eclipse.e4.ui.services.IServiceConstants;\r
+import org.eclipse.ui.IEditorPart;\r
+import org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor;\r
+import org.simantics.g2d.canvas.ICanvasContext;\r
+import org.simantics.scenegraph.g2d.events.EventDebugPolicy;\r
+import org.simantics.scenegraph.g2d.events.EventQueue;\r
+import org.simantics.scenegraph.g2d.events.command.Command;\r
+import org.simantics.scenegraph.g2d.events.command.CommandEvent;\r
+import org.simantics.utils.ui.workbench.WorkbenchUtils;\r
+\r
+/**\r
+ * A handler for the Eclipse Command framework that delegates ID of the command\r
+ * that triggered the event to the {@link EventQueue} of the\r
+ * {@link ICanvasContext} where the event occurred.\r
+ */\r
+public class CanvasCommandDelegate {\r
+\r
+    private final boolean DEBUG = EventDebugPolicy.CANVAS_COMMAND_DELEGATION;\r
+    \r
+    private static final String ACTIVE_PART_PARAMETER = "org.simantics.diagram.commandparameter.canvasCommandHandlerActiveWithPart";\r
+    private static final String DELEGATE_PARAMETER = "org.simantics.diagram.commandparameter.canvasCommandDelegateParameter";\r
+\r
+    @CanExecute\r
+    public boolean canExecute(@Named(ACTIVE_PART_PARAMETER) String activePartId, @Named(IServiceConstants.ACTIVE_PART) MPart activePart) {\r
+        if (activePart == null)\r
+            return false;\r
+        if (!(activePart.getObject() instanceof CompatibilityEditor))\r
+            return false;\r
+        CompatibilityEditor compatibilityEditor = (CompatibilityEditor) activePart.getObject();\r
+        IEditorPart part = compatibilityEditor.getEditor();\r
+        if (part == null)\r
+               return false;\r
+        ICanvasContext ctx = part.getAdapter(ICanvasContext.class);\r
+        if (ctx == null)\r
+            return false;\r
+        String id = compatibilityEditor.getReference().getId();\r
+        if (!(id.equals(activePartId)))\r
+            return false;\r
+        return true;\r
+    }\r
+    \r
+    @SuppressWarnings("restriction")\r
+    @Execute\r
+    public void execute(@Named(DELEGATE_PARAMETER) String commandId, @Named(IServiceConstants.ACTIVE_PART) MPart activePart) {\r
+        CommandEvent ce = new CommandEvent(null, System.currentTimeMillis(), new Command(commandId));\r
+        if (DEBUG)\r
+            System.out.println(getClass().getSimpleName() + ": trigger event for command " + ce.command);\r
+\r
+        Object object = activePart.getObject();\r
+        \r
+        IAdaptable part = null;\r
+        if (object instanceof CompatibilityEditor) {\r
+            CompatibilityEditor editor = (CompatibilityEditor) object;\r
+            part = editor.getPart();\r
+        } else if (object instanceof IAdaptable){\r
+            part = (IAdaptable) object; \r
+        }\r
+        ICanvasContext canvas = null;\r
+        if (part != null)\r
+            canvas = (ICanvasContext) part.getAdapter(ICanvasContext.class);\r
+        if (canvas == null) {\r
+            part = WorkbenchUtils.getActiveWorkbenchPart();\r
+            if (part != null)\r
+                canvas = (ICanvasContext) part.getAdapter(ICanvasContext.class);\r
+        }\r
+        if (canvas != null) {\r
+            if (DEBUG)\r
+                System.out.println(getClass().getSimpleName() + ": sending command " + commandId + " to " + part);\r
+            canvas.getEventQueue().queueEvent(ce);\r
+        }\r
+    }\r
+\r
+}
\ No newline at end of file