Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.swt / src / org / simantics / browsing / ui / swt / TreeTruncationDecoratorFactory.java

diff --git a/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/TreeTruncationDecoratorFactory.java b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/TreeTruncationDecoratorFactory.java
new file mode 100644 (file)
index 0000000..6087e74
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/TreeTruncationDecoratorFactory.java
@@ -0,0 +1,91 @@
+/*******************************************************************************\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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