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/********************************************************************************
* Copyright (c) 2002, 2006 IBM Corporation. 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
*
* Initial Contributors:
* The following IBM employees contributed to the Remote System Explorer
* component that contains this file: David McKnight, Kushal Munir,
* Michael Berger, David Dykstal, Phil Coulthard, Don Yantzi, Eric Simpson,
* Emily Bruner, Mazen Faraj, Adrian Storisteanu, Li Ding, and Kent Hawley.
*
* Contributors:
* {Name} (company) - description of contribution.
********************************************************************************/
package org.eclipse.rse.ui.dialogs;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.rse.ui.view.SystemPropertySheetForm;
import org.eclipse.rse.ui.view.SystemViewForm;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
/**
* Helper class to save the enable/disable state of a control
* including all its descendent controls.
*/
public class SystemControlEnableState
{
/**
* List of exception controls (element type: <code>Control</code>);
* <code>null</code> if none.
*/
private List exceptions = null;
/**
* List of saved states (element type: <code>ItemState</code>).
*/
private List states;
/**
* Internal class for recording the enable/disable state of a
* single control.
*/
private class ItemState
{
protected Control item;
protected boolean state;
public ItemState(Control item, boolean state)
{
this.item = item;
this.state = state;
}
public void restore()
{
if (item != null)
item.setEnabled(state);
}
}
/**
* Creates a new object and saves in it the current enable/disable
* state of the given control and its descendents; the controls
* that are saved are also disabled.
*
* @param w the control
*/
protected SystemControlEnableState(Control w)
{
this(w, null);
}
/**
* Creates a new object and saves in it the current enable/disable
* state of the given control and its descendents except for the
* given list of exception cases; the controls that are saved
* are also disabled.
*
* @param w the control
* @param exceptions the list of controls to not disable
* (element type: <code>Control</code>), or <code>null</code> if none
*/
protected SystemControlEnableState(Control w, List exceptions)
{
super();
states = new ArrayList();
this.exceptions = exceptions;
readStateForAndDisable(w);
}
/**
* Saves the current enable/disable state of the given control
* and its descendents in the returned object; the controls
* are all disabled.
*
* @param w the control
* @return an object capturing the enable/disable state
*/
public static SystemControlEnableState disable(Control w)
{
return new SystemControlEnableState(w);
}
/**
* Saves the current enable/disable state of the given control
* and its descendents in the returned object except for the
* given list of exception cases; the controls that are saved
* are also disabled.
*
* @param w the control
* @param exceptions the list of controls to not disable
* (element type: <code>Control</code>)
* @return an object capturing the enable/disable state
*/
public static SystemControlEnableState disable(Control w, List exceptions)
{
return new SystemControlEnableState(w, exceptions);
}
/**
* Recursively reads the enable/disable state for the given window
* and disables all controls.
*/
private void readStateForAndDisable(Control w)
{
if ((exceptions != null && exceptions.contains(w)))
return;
if ((w instanceof Composite) && !(w instanceof SystemViewForm) && !(w instanceof SystemPropertySheetForm))
{
Composite c = (Composite) w;
Control[] children = c.getChildren();
for (int i = 0; i < children.length; i++)
{
readStateForAndDisable(children[i]);
}
}
// XXX: Workaround for 1G2Q8SS: ITPUI:Linux - Combo box is not enabled in "File->New->Solution"
states.add(new ItemState(w, w.getEnabled()));
w.setEnabled(false);
}
/**
* Restores the window enable state saved in this object.
*/
public void restore()
{
int size = states.size();
for (int i = 0; i < size; i++)
{
((ItemState) states.get(i)).restore();
}
}
}
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