X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fevents%2FIEventQueue.java;fp=bundles%2Forg.simantics.scenegraph%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fg2d%2Fevents%2FIEventQueue.java;h=a0874b0f4c696236630262188ad5d0702e8cac6f;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/IEventQueue.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/IEventQueue.java
new file mode 100644
index 000000000..a0874b0f4
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+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/g2d/events/IEventQueue.java
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * 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
+ *******************************************************************************/
+/*
+ *
+ * @author Toni Kalajainen
+ */
+package org.simantics.scenegraph.g2d.events;
+
+import org.simantics.utils.threads.IThreadWorkQueue;
+
+/**
+ * 
+ * @see MouseEventCoalescer
+ * @see EventQueue Default implementation
+ * @author Toni Kalajainen
+ */
+public interface IEventQueue {
+
+    /**
+     * queues event
+     * 
+     * @param e
+     */
+    void queueEvent(Event e);
+
+    /**
+     * Queue event as next to be processed
+     * 
+     * @param e
+     */
+    void queueFirst(Event e);
+
+    boolean isEmpty();
+
+    int size();
+
+    void addEventCoalesceler(EventCoalescer coalescaler);
+    void removeEventCoalesceler(EventCoalescer coalescaler);
+
+    void addQueueListener(IEventQueueListener listener);
+    void removeQueueListener(IEventQueueListener listener);
+    void addQueueListener(IEventQueueListener listener, IThreadWorkQueue thread);
+    void removeQueueListener(IEventQueueListener listener, IThreadWorkQueue thread);
+
+    /**
+     * Coalesces mouse events.
+     */
+    public interface EventCoalescer {
+        /**
+         * 
+         * @param apriori
+         * @param aposterior
+         * @return coalesced event of the two or <code>null</code> if the two
+         *         events cannot be coalesced
+         */
+        Event coalesce(Event apriori, Event aposterior);
+    }
+
+    public interface IEventQueueListener {
+        void onEventAdded(IEventQueue queue, Event e, int index);
+        void onQueueEmpty(IEventQueue queue);
+    }
+
+}