X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.event%2Fsrc%2Forg%2Fsimantics%2Fevent%2Fview%2Fhandler%2FPreferenceHandler.java;fp=bundles%2Forg.simantics.event%2Fsrc%2Forg%2Fsimantics%2Fevent%2Fview%2Fhandler%2FPreferenceHandler.java;h=8f9da61dad5d395daf9c05badc74161220055075;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.event/src/org/simantics/event/view/handler/PreferenceHandler.java b/bundles/org.simantics.event/src/org/simantics/event/view/handler/PreferenceHandler.java
new file mode 100644
index 000000000..8f9da61da
--- /dev/null
+++ b/bundles/org.simantics.event/src/org/simantics/event/view/handler/PreferenceHandler.java
@@ -0,0 +1,112 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2011 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.event.view.handler;
+
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.ui.commands.IElementUpdater;
+import org.eclipse.ui.handlers.HandlerUtil;
+import org.eclipse.ui.menus.UIElement;
+import org.simantics.Simantics;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.Session;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.utils.TagUtil;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.SelectionHints;
+import org.simantics.db.request.Read;
+import org.simantics.utils.ui.ErrorLogger;
+import org.simantics.utils.ui.ISelectionUtils;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+class PreferenceHandler extends AbstractHandler implements IElementUpdater {
+
+    protected final String virtualGraphId;
+    private final String   tagURI;
+    private final boolean  tag;
+
+    public PreferenceHandler() {
+        this("preferences", null, false);
+    }
+
+    public PreferenceHandler(String tagURI, boolean tag) {
+        this("preferences", tagURI, tag);
+    }
+
+    public PreferenceHandler(String virtualGraphId) {
+        this(virtualGraphId, null, false);
+    }
+
+    public PreferenceHandler(String virtualGraphId, String tagURI, boolean tag) {
+        this.virtualGraphId = virtualGraphId;
+        this.tagURI = tagURI;
+        this.tag = tag;
+    }
+
+    @Override
+    public Object execute(ExecutionEvent event) throws ExecutionException {
+        Session session = Simantics.peekSession();
+        if (session == null)
+            return null;
+        ISelection selection = HandlerUtil.getCurrentSelection(event);
+        final List<Resource> resources = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
+        new TagUtil(virtualGraphId, tagURI, tag) {
+            @Override
+            protected void processSelection(WriteGraph graph, List<Resource> resources) throws DatabaseException {
+                if (!process(graph))
+                    return;
+                super.processSelection(graph, resources);
+            }
+        }.execute(session, resources);
+        return null;
+    }
+
+    /**
+     * @return <code>false</code> to perform no further actions after this
+     *         method completes.
+     */
+    protected boolean process(WriteGraph graph) throws DatabaseException {
+        return true;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public void updateElement(UIElement element, Map parameters) {
+        Session session = Simantics.peekSession();
+        if (session == null)
+            return;
+        try {
+            boolean checked = session.syncRequest(new Read<Boolean>() {
+                @Override
+                public Boolean perform(ReadGraph graph) throws DatabaseException {
+                    return isChecked(graph);
+                }
+            });
+            element.setChecked(checked);
+        } catch (DatabaseException e) {
+            ErrorLogger.defaultLogError(e);
+        }
+    }
+
+    protected boolean isChecked(ReadGraph graph) throws DatabaseException {
+        return false;
+    }
+
+}