--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2012 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.swt.widgets.impl;\r
+\r
+import org.eclipse.jface.resource.ResourceManager;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.exception.DatabaseException;\r
+\r
+public interface WidgetSupport {\r
+\r
+ /**\r
+ * The key for {@link #setParameter(String, Object)} used to associate a\r
+ * {@link ResourceManager} instance with this widget support context.\r
+ * Widgets that need to load resources (fonts, colors or images) need this.\r
+ */\r
+ public static final String RESOURCE_MANAGER = "resourceManager";\r
+\r
+ public static final Object NO_INPUT = new Object();\r
+ \r
+ /*\r
+ * The widget is set to receive input updates from this support\r
+ */\r
+ void register(Widget widget);\r
+ /*\r
+ * Updates will start only after this call\r
+ */\r
+ void finish();\r
+ /*\r
+ * Force update of widget\r
+ */\r
+ void update(Widget widget);\r
+ /*\r
+ * Force update of all widgets\r
+ */\r
+ void update();\r
+ /*\r
+ * Query current input\r
+ */\r
+ <T> T getInput();\r
+ \r
+ <T> T getParameter(String key);\r
+ void setParameter(String key, Object value);\r
+ \r
+ <T> T getInput(ReadGraph graph) throws DatabaseException;\r
+ \r
+}\r