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diff --git a/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/presentation/PropertyEditorPresentation.java b/propertysheet/src/org/eclipse/wb/internal/core/model/property/editor/presentation/PropertyEditorPresentation.java
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+/*******************************************************************************
+ * Copyright (c) 2011 Google, Inc.
+ * 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:
+ *    Google, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.wb.internal.core.model.property.editor.presentation;
+
+import org.eclipse.wb.internal.core.model.property.Property;
+import org.eclipse.wb.internal.core.model.property.editor.PropertyEditor;
+import org.eclipse.wb.internal.core.model.property.table.PropertyTable;
+
+/**
+ * Implementations of {@link PropertyEditorPresentation} are used to show some presentation for
+ * visible, but not activated yet {@link PropertyEditor}.
+ * 
+ * @author scheglov_ke
+ * @coverage core.model.property.editor
+ */
+public abstract class PropertyEditorPresentation {
+  /**
+   * Shows presentation for given {@link Property}.
+   * 
+   * @return the width that this presentation occupies on the right of given rectangle.
+   */
+  public abstract int show(PropertyTable propertyTable,
+      Property property,
+      int x,
+      int y,
+      int width,
+      int height);
+
+  /**
+   * Hides presentation.
+   */
+  public abstract void hide(PropertyTable propertyTable, Property property);
+}