X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Finternal%2FUIElementReference.java;fp=bundles%2Forg.simantics.browsing.ui.common%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fcommon%2Finternal%2FUIElementReference.java;h=a481c87e4853a432ab8c3d4518d4befe4ab9e71c;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08
diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/UIElementReference.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/UIElementReference.java
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+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/internal/UIElementReference.java
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+/*******************************************************************************
+ * 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.browsing.ui.common.internal;
+
+
+/**
+ * An abstract reference to a single concrete graph explorer control item.
+ *
+ * @author Tuukka Lehtonen
+ */
+public interface UIElementReference {
+
+ /**
+ * @return true
if this TreeReference actually contains an
+ * element behind it.
+ */
+ public boolean hasReference();
+
+ /**
+ * @return false
only if {@link #hasReference()} returns true
+ * and the referenced control item not disposed. Note that
+ * this method must return true
if
+ * {@link #hasReference()} returns false
.
+ */
+ public boolean isDisposed();
+
+}