X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.swt%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fswt%2FTreeTruncationDecoratorFactory.java;fp=bundles%2Forg.simantics.browsing.ui.swt%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fswt%2FTreeTruncationDecoratorFactory.java;h=6087e741033ed8049d4e962fa1e4b9d318f71ef6;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
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index 000000000..6087e7410
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+++ b/bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/TreeTruncationDecoratorFactory.java
@@ -0,0 +1,91 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2012 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.browsing.ui.swt;
+
+import java.util.Collections;
+import java.util.Set;
+
+import org.eclipse.jface.resource.FontDescriptor;
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.NodeQueryManager;
+import org.simantics.browsing.ui.common.ColumnKeys;
+import org.simantics.browsing.ui.content.LabelDecorator;
+import org.simantics.browsing.ui.content.PrunedChildrenResult;
+
+/**
+ * A label decorator factory that shows a [children shown/total] suffix for a
+ * node context when it is expanded.
+ * 
+ * @author Tuukka Lehtonen
+ */
+public class TreeTruncationDecoratorFactory {
+
+    protected int         withStyle;
+    protected Set<String> decoratedColumns;
+
+    public TreeTruncationDecoratorFactory(int withStyle) {
+        this(withStyle, Collections.singleton(ColumnKeys.SINGLE));
+    }
+
+    public TreeTruncationDecoratorFactory(int withStyle, Set<String> decoratedColumns) {
+        this.withStyle = withStyle;
+        this.decoratedColumns = decoratedColumns;
+    }
+
+    public LabelDecorator create(NodeQueryManager manager, NodeContext context) {
+        boolean expanded = manager.query(context, BuiltinKeys.IS_EXPANDED);
+        if (!expanded)
+            return null;
+
+        PrunedChildrenResult prunedChildren = manager.query(context, BuiltinKeys.PRUNED_CHILDREN);
+        NodeContext[] finalChildren = manager.query(context, BuiltinKeys.FINAL_CHILDREN);
+        final int prunedLength = prunedChildren.getPrunedChildren().length;
+        final int finalLength = finalChildren.length;
+        if (prunedLength == finalLength) {
+            if (finalLength >= 10) {
+                return new LabelDecorator.Stub() {
+                    @Override
+                    public String decorateLabel(String label, String column, int itemIndex) {
+                        if (decoratedColumns.contains(column))
+                            return label + " [" + finalLength + "]";
+                        return null;
+                    }
+                    @Override
+                    public <F> F decorateFont(F font, String column, int itemIndex) {
+                        //if (decoratedColumns.contains(column))
+                        //    return (F) ((FontDescriptor) font).withStyle(withStyle);
+                        return null;
+                    }
+                };
+            }
+            return null;
+        }
+
+        return new LabelDecorator.Stub() {
+            @Override
+            public String decorateLabel(String label, String column, int itemIndex) {
+                if (decoratedColumns.contains(column))
+                    return label + " [showing " + finalLength + "/" + prunedLength + "]";
+                return null;
+            }
+            @SuppressWarnings("unchecked")
+            @Override
+            public <F> F decorateFont(F font, String column, int itemIndex) {
+                if (decoratedColumns.contains(column))
+                    return (F) ((FontDescriptor) font).withStyle(withStyle);
+                return null;
+            }
+        };
+    }
+
+}
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