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/*******************************************************************************
* Copyright (c) 2001, 2004 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.wst.xsd.ui.internal.graph.figures;
import java.util.Iterator;
import java.util.List;
import org.eclipse.draw2d.AbstractLayout;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
/**
* Figures using the StackLayout as their layout manager have
* their children placed on top of one another. Order of
* placement is determined by the order in which the children
* were added, first child added placed on the bottom.
*/
public class FillLayout extends AbstractLayout
{
protected boolean isHorizontal = false;
protected int spacing = 0;
public Dimension min;
public FillLayout(){}
public FillLayout(boolean dummy){}
public FillLayout(int spacing)
{
this.spacing = spacing;
}
public void setHorizontal(boolean isHorizontal)
{
this.isHorizontal = isHorizontal;
}
/**
* Calculates and returns the preferred size of the input container.
* This is the size of the largest child of the container, as all
* other children fit into this size.
*
* @param figure Container figure for which preferred size is required.
* @return The preferred size of the input figure.
*/
protected Dimension calculatePreferredSize(IFigure figure, int w, int h)
{
Dimension d = calculatePreferredClientAreaSize(figure);
d.expand(figure.getInsets().getWidth(),
figure.getInsets().getHeight());
//d.union(getBorderPreferredSize(figure));
return d;
}
protected Dimension calculatePreferredClientAreaSize(IFigure figure)
{
Dimension d = new Dimension();
List children = figure.getChildren();
for (Iterator i = children.iterator(); i.hasNext(); )
{
IFigure child = (IFigure)i.next();
Dimension childSize = child.getPreferredSize();
if (isHorizontal)
{
d.width += childSize.width;
d.height = Math.max(childSize.height, d.height);
}
else
{
d.height += childSize.height;
d.width = Math.max(childSize.width, d.width);
}
}
int childrenSize = children.size();
if (childrenSize > 0)
{
if (isHorizontal)
d.width += spacing * (childrenSize - 1);
else
d.height += spacing * (childrenSize - 1);
}
if (min != null)
{
d.width = Math.max(d.width, min.width);
d.height = Math.max(d.height, min.height);
}
return d;
}
/*
* Returns the minimum size required by the input container.
* This is the size of the largest child of the container, as all
* other children fit into this size.
*/
public Dimension getMinimumSize(IFigure figure, int w, int h)
{
Dimension d = new Dimension();
List children = figure.getChildren();
IFigure child;
for (int i=0; i < children.size(); i++){
child = (IFigure)children.get(i);
d.union(child.getMinimumSize());
}
d.expand(figure.getInsets().getWidth(),
figure.getInsets().getHeight());
return d;
}
public Dimension getPreferredSize(IFigure figure, int w, int h)
{
return calculatePreferredSize(figure, w, h);
}
/*
* Lays out the children on top of each other with
* their sizes equal to that of the available
* paintable area of the input container figure.
*/
public void layout(IFigure figure){
Dimension preferredSize = calculatePreferredClientAreaSize(figure);
Rectangle r = figure.getClientArea().getCopy();
List children = figure.getChildren();
for (Iterator i = children.iterator(); i.hasNext(); )
{
IFigure child = (IFigure)i.next();
Dimension childSize = child.getPreferredSize();
if (isHorizontal)
{
child.setBounds(new Rectangle(r.x, r.y, childSize.width, Math.max(preferredSize.height, r.height)));
r.x += childSize.width + spacing;
}
else
{
child.setBounds(new Rectangle(r.x, r.y, Math.max(preferredSize.width, r.width), childSize.height));
r.y += childSize.height + spacing;
}
}
}
}
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