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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.util.ui.widgets;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Sash;
public abstract class SashComposite extends Composite
{
private boolean vertical;
private FormLayout form;
private Sash sash;
private Control control1;
private Control control2;
private FormData sashData;
private FormData control1Data;
private FormData control2Data;
private int limit;
private int percent;
public SashComposite(Composite parent, int style, int limit, int percent)
{
this(parent, style, limit, percent, true);
}
public SashComposite(Composite parent, int style, int limit, int percent, boolean vertical)
{
super(parent, style);
this.vertical = vertical;
this.limit = limit;
this.percent = percent;
form = new FormLayout();
setLayout(form);
control1Data = new FormData();
control1 = createControl1(this);
control1.setLayoutData(control1Data);
sashData = new FormData();
sash = createSash(this);
sash.setLayoutData(sashData);
control2Data = new FormData();
control2 = createControl2(this);
control2.setLayoutData(control2Data);
init();
if (!vertical)
{
swap();
}
}
public boolean isVertical()
{
return vertical;
}
public void setVertical(boolean vertical)
{
if (this.vertical != vertical)
{
this.vertical = vertical;
swap();
layout();
}
}
public Sash getSash()
{
return sash;
}
public Control getControl1()
{
return control1;
}
public Control getControl2()
{
return control2;
}
protected void init()
{
control1Data.left = new FormAttachment(0, 0);
control1Data.right = new FormAttachment(sash, 0);
control1Data.top = new FormAttachment(0, 0);
control1Data.bottom = new FormAttachment(100, 0);
sashData.left = new FormAttachment(percent, 0);
sashData.right = null;
sashData.top = new FormAttachment(0, 0);
sashData.bottom = new FormAttachment(100, 0);
control2Data.left = new FormAttachment(sash, 0);
control2Data.right = new FormAttachment(100, 0);
control2Data.top = new FormAttachment(0, 0);
control2Data.bottom = new FormAttachment(100, 0);
}
protected void swap()
{
swap(control1Data);
swap(sashData);
swap(control2Data);
}
protected void swap(FormData formData)
{
FormAttachment tmp = formData.left;
formData.left = formData.top;
formData.top = tmp;
tmp = formData.right;
formData.right = formData.bottom;
formData.bottom = tmp;
}
protected Sash createSash(Composite parent)
{
Sash sash = new Sash(parent, vertical ? SWT.VERTICAL : SWT.HORIZONTAL);
sash.addListener(SWT.Selection, new SashListener());
return sash;
}
protected abstract Control createControl1(Composite parent);
protected abstract Control createControl2(Composite parent);
/**
* @author Eike Stepper
*/
private final class SashListener implements Listener
{
public SashListener()
{
}
public void handleEvent(Event e)
{
Rectangle sashRect = sash.getBounds();
Rectangle shellRect = SashComposite.this.getClientArea();
if (vertical)
{
int right = shellRect.width - sashRect.width - limit;
e.x = Math.max(Math.min(e.x, right), limit);
if (e.x != sashRect.x)
{
sashData.left = new FormAttachment(0, e.x);
SashComposite.this.layout();
}
}
else
{
int bottom = shellRect.height - sashRect.height - limit;
e.y = Math.max(Math.min(e.y, bottom), limit);
if (e.y != sashRect.y)
{
sashData.top = new FormAttachment(0, e.y);
SashComposite.this.layout();
}
}
}
}
}
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