X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.ui%2Fsrc%2Forg%2Fsimantics%2Fui%2Fworkbench%2FContextUtil.java;fp=bundles%2Forg.simantics.ui%2Fsrc%2Forg%2Fsimantics%2Fui%2Fworkbench%2FContextUtil.java;h=d68849fc2fd587f201cdb4cb93e57ded5b9747e0;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/workbench/ContextUtil.java b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/ContextUtil.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.ui.workbench;
+
+import org.eclipse.swt.events.FocusEvent;
+import org.eclipse.swt.events.FocusListener;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.ui.IWorkbenchSite;
+import org.eclipse.ui.contexts.IContextActivation;
+import org.eclipse.ui.contexts.IContextService;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public final class ContextUtil {
+
+    /**
+     * Associate a workbench context specified by id with the focus state of the specified control.
+     * 
+     * @param site any workbench site
+     * @param control the control whose focus to track for context activation
+     * @param contextId the ID of the context to use
+     */
+    public static void associateContext(final IWorkbenchSite site, Control control, final String contextId) {
+        control.addFocusListener(new FocusListener() {
+            IContextActivation contextActivation;
+
+            IContextService getService() {
+                if (site == null)
+                    return null;
+                return (IContextService) site.getService(IContextService.class);
+            }
+
+            @Override
+            public void focusGained(FocusEvent e) {
+                IContextService contextService = getService();
+                String ctx = contextId;
+                if (contextService != null && ctx != null)
+                    contextActivation = contextService.activateContext(ctx);
+            }
+
+            @Override
+            public void focusLost(FocusEvent e) {
+                IContextService contextService = getService();
+                if (contextService != null && contextActivation != null)
+                    contextService.deactivateContext(contextActivation);
+            }
+        });
+    }
+
+}