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/*******************************************************************************
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* Copyright (c) 2003, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.gef.internal.ui.rulers;
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import java.util.List;
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import org.eclipse.draw2d.IFigure;
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import org.eclipse.draw2d.XYLayout;
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import org.eclipse.draw2d.geometry.Dimension;
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import org.eclipse.draw2d.geometry.Rectangle;
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/**
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* A custom layout manager for rulers. It is not meant to be used externally or
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* with any figure other than a
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* {@link org.eclipse.gef.internal.ui.rulers.RulerFigure ruler}.
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*
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* @author Pratik Shah
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* @since 3.0
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*/
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public class RulerLayout extends XYLayout {
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/**
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* @see org.eclipse.draw2d.AbstractLayout#calculatePreferredSize(org.eclipse.draw2d.IFigure,
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* int, int)
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*/
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protected Dimension calculatePreferredSize(IFigure container, int wHint,
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int hHint) {
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return new Dimension(1, 1);
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}
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/**
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* @see org.eclipse.draw2d.AbstractLayout#getConstraint(org.eclipse.draw2d.IFigure)
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*/
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public Object getConstraint(IFigure child) {
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return constraints.get(child);
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}
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/**
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* @see org.eclipse.draw2d.LayoutManager#layout(org.eclipse.draw2d.IFigure)
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*/
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public void layout(IFigure container) {
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List children = container.getChildren();
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Rectangle rulerSize = container.getClientArea();
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for (int i = 0; i < children.size(); i++) {
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IFigure child = (IFigure) children.get(i);
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Dimension childSize = child.getPreferredSize();
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int position = ((Integer) getConstraint(child)).intValue();
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if (((RulerFigure) container).isHorizontal()) {
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childSize.height = rulerSize.height - 1;
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Rectangle.SINGLETON.setLocation(position
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- (childSize.width / 2), rulerSize.y);
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} else {
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childSize.width = rulerSize.width - 1;
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Rectangle.SINGLETON.setLocation(rulerSize.x, position
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- (childSize.height / 2));
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}
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Rectangle.SINGLETON.setSize(childSize);
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child.setBounds(Rectangle.SINGLETON);
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}
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}
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}
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