+/*******************************************************************************\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;\r
+\r
+import java.util.Collections;\r
+import java.util.Set;\r
+\r
+import org.eclipse.jface.resource.FontDescriptor;\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.NodeQueryManager;\r
+import org.simantics.browsing.ui.common.ColumnKeys;\r
+import org.simantics.browsing.ui.content.LabelDecorator;\r
+import org.simantics.browsing.ui.content.PrunedChildrenResult;\r
+\r
+/**\r
+ * A label decorator factory that shows a [children shown/total] suffix for a\r
+ * node context when it is expanded.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class TreeTruncationDecoratorFactory {\r
+\r
+ protected int withStyle;\r
+ protected Set<String> decoratedColumns;\r
+\r
+ public TreeTruncationDecoratorFactory(int withStyle) {\r
+ this(withStyle, Collections.singleton(ColumnKeys.SINGLE));\r
+ }\r
+\r
+ public TreeTruncationDecoratorFactory(int withStyle, Set<String> decoratedColumns) {\r
+ this.withStyle = withStyle;\r
+ this.decoratedColumns = decoratedColumns;\r
+ }\r
+\r
+ public LabelDecorator create(NodeQueryManager manager, NodeContext context) {\r
+ boolean expanded = manager.query(context, BuiltinKeys.IS_EXPANDED);\r
+ if (!expanded)\r
+ return null;\r
+\r
+ PrunedChildrenResult prunedChildren = manager.query(context, BuiltinKeys.PRUNED_CHILDREN);\r
+ NodeContext[] finalChildren = manager.query(context, BuiltinKeys.FINAL_CHILDREN);\r
+ final int prunedLength = prunedChildren.getPrunedChildren().length;\r
+ final int finalLength = finalChildren.length;\r
+ if (prunedLength == finalLength) {\r
+ if (finalLength >= 10) {\r
+ return new LabelDecorator.Stub() {\r
+ @Override\r
+ public String decorateLabel(String label, String column, int itemIndex) {\r
+ if (decoratedColumns.contains(column))\r
+ return label + " [" + finalLength + "]";\r
+ return null;\r
+ }\r
+ @Override\r
+ public <F> F decorateFont(F font, String column, int itemIndex) {\r
+ //if (decoratedColumns.contains(column))\r
+ // return (F) ((FontDescriptor) font).withStyle(withStyle);\r
+ return null;\r
+ }\r
+ };\r
+ }\r
+ return null;\r
+ }\r
+\r
+ return new LabelDecorator.Stub() {\r
+ @Override\r
+ public String decorateLabel(String label, String column, int itemIndex) {\r
+ if (decoratedColumns.contains(column))\r
+ return label + " [showing " + finalLength + "/" + prunedLength + "]";\r
+ return null;\r
+ }\r
+ @SuppressWarnings("unchecked")\r
+ @Override\r
+ public <F> F decorateFont(F font, String column, int itemIndex) {\r
+ if (decoratedColumns.contains(column))\r
+ return (F) ((FontDescriptor) font).withStyle(withStyle);\r
+ return null;\r
+ }\r
+ };\r
+ }\r
+\r
+}
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