X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fhandler%2FCanvasCommandDelegate.java;fp=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fhandler%2FCanvasCommandDelegate.java;h=094fc8722316a47821ad55f954d72c2106cc89a4;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/CanvasCommandDelegate.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/CanvasCommandDelegate.java
new file mode 100644
index 000000000..094fc8722
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/handler/CanvasCommandDelegate.java
@@ -0,0 +1,71 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.diagram.handler;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.ui.IWorkbenchPart;
+import org.eclipse.ui.handlers.HandlerUtil;
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.chassis.ICanvasChassis;
+import org.simantics.scenegraph.g2d.events.EventDebugPolicy;
+import org.simantics.scenegraph.g2d.events.EventQueue;
+import org.simantics.scenegraph.g2d.events.command.Command;
+import org.simantics.scenegraph.g2d.events.command.CommandEvent;
+
+/**
+ * A handler for the Eclipse Command framework that delegates ID of the command
+ * that triggered the event to the {@link EventQueue} of the
+ * {@link ICanvasContext} where the event occurred.
+ */
+public class CanvasCommandDelegate extends AbstractHandler {
+
+    private final boolean DEBUG = EventDebugPolicy.CANVAS_COMMAND_DELEGATION;
+
+    @Override
+    public Object execute(ExecutionEvent event) throws ExecutionException {
+        Event e = ((Event)event.getTrigger());
+        CommandEvent ce = new CommandEvent(null, e.time, new Command(event.getCommand().getId()));
+
+        if (DEBUG)
+            System.out.println(getClass().getSimpleName() + ": trigger event = " + e + " for command " + ce.command);
+
+        if (e.widget instanceof ICanvasChassis) {
+            ICanvasChassis chassis = (ICanvasChassis) e.widget;
+            ICanvasContext canvas = chassis.getCanvasContext();
+            if (canvas != null) {
+                if (DEBUG)
+                    System.out.println(getClass().getSimpleName() + ": sending command " + event.getCommand().getId() + " to " + chassis);
+                canvas.getEventQueue().queueEvent( ce );
+            }
+        } else {
+            ICanvasContext canvas = null;
+            IWorkbenchPart part = HandlerUtil.getActiveEditor(event);
+            if (part != null)
+                canvas = (ICanvasContext) part.getAdapter(ICanvasContext.class);
+            if (canvas == null) {
+                part = HandlerUtil.getActivePart(event);
+                if (part != null)
+                    canvas = (ICanvasContext) part.getAdapter(ICanvasContext.class);
+            }
+            if (canvas != null) {
+                if (DEBUG)
+                    System.out.println(getClass().getSimpleName() + ": sending command " + event.getCommand().getId() + " to " + part);
+                canvas.getEventQueue().queueEvent(ce);
+            }
+        }
+        return null;
+    }
+
+}
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