org.eclipse.jface.text.source.IOverviewRuler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.eclipse.jface.text Show documentation
This is org.eclipse.jface.text jar used by Scout SDK
The newest version!
/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jface.text.source;

import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Control;

/**
 * This interface defines a visual component which may serve text viewers as an overview annotation
 * presentation area. This means, presentation of annotations is independent from the actual view
 * port of the text viewer. The annotations of the viewer's whole document are visible in the
 * overview ruler.
 * 
 * This interfaces embodies three contracts:
 * 

 * The overview ruler retrieves the annotations it presents from an annotation model.
 * 
The ruler is a visual component which must be integrated in a hierarchy of SWT controls.
 * 
The ruler provides interested clients with mapping and interaction information. This covers
 * the mapping between coordinates of the ruler's control and line numbers based on the connected
 * text viewer's document (IVerticalRulerInfo).
 * 
 * 
 * 
 * In order to provide backward compatibility for clients of IOverviewRuler, extension
 * interfaces are used as a means of evolution. The following extension interfaces exist:
 * 

 * {@link org.eclipse.jface.text.source.IOverviewRulerExtension} since version 3.8
 * allowing the ruler to set whether to use saturated colors.
 * 
 * 
 * 
 * Clients may implement this interface or use the default implementation provided by
 * OverviewRuler.
 * 
 * 
 * @see org.eclipse.jface.text.ITextViewer
 * @see org.eclipse.jface.text.source.IOverviewRulerExtension
 * @since 2.1
 */
public interface IOverviewRuler extends IVerticalRuler {

	/**
	 * Returns whether there is an annotation an the given vertical coordinate. This
	 * method takes the compression factor of the overview ruler into account.
	 *
	 * @param y the y-coordinate
	 * @return true if there is an annotation, false otherwise
	 */
	boolean hasAnnotation(int y);

	/**
	 * Returns the height of the visual presentation of an annotation in this
	 * overview ruler. Assumes that all annotations are represented using the
	 * same height.
	 *
	 * @return the visual height of an annotation
	 */
	int getAnnotationHeight();

	/**
	 * Sets the color for the given annotation type in this overview ruler.
	 *
	 * @param annotationType the annotation type
	 * @param color the color
	 */
	void setAnnotationTypeColor(Object annotationType, Color color);

	/**
	 * Sets the drawing layer for the given annotation type in this overview ruler.
	 *
	 * @param annotationType the annotation type
	 * @param layer the drawing layer
	 */
	void setAnnotationTypeLayer(Object annotationType, int layer);

	/**
	 * Adds the given annotation type to this overview ruler. Starting with this
	 * call, annotations of the given type are shown in the overview ruler.
	 *
	 * @param annotationType the annotation type
	 */
	void addAnnotationType(Object annotationType);

	/**
	 * Removes the given annotation type from this overview ruler. Annotations
	 * of the given type are no longer shown in the overview ruler.
	 *
	 * @param annotationType the annotation type
	 */
	void removeAnnotationType(Object annotationType);

	/**
	 * Adds the given annotation type to the header of this ruler. Starting with
	 * this call, the presence of annotations is tracked and the header is drawn
	 * in the configured color.
	 *
	 * @param annotationType the annotation type to be tracked
	 */
	void addHeaderAnnotationType(Object annotationType);

	/**
	 * Removes the given annotation type from the header of this ruler. The
	 * presence of annotations of the given type is no longer tracked and the
	 * header is drawn in the default color, depending on the other configured
	 * configured annotation types.
	 *
	 * @param annotationType the annotation type to be removed
	 */
	void removeHeaderAnnotationType(Object annotationType);

	/**
	 * Returns this rulers header control. This is the little area between the
	 * top of the text widget and the top of this overview ruler.
	 *
	 * @return the header control of this overview ruler.
 	 */
	Control getHeaderControl();
}