BaseSettingEntry.java

/*
  DiskSettingEntry.java

  (c) 2012-2015 Edward Swartz

  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
 */
package v9t9.gui.client.swt.shells.disk;

import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;

import v9t9.common.dsr.IDsrEnablementSetting;
import v9t9.common.machine.IMachine;
import v9t9.common.settings.ISettingDecorator;
import ejs.base.properties.IProperty;
import ejs.base.properties.IPropertyListener;
import ejs.base.settings.ISettingProperty;

abstract class BaseSettingEntry extends Composite {
	protected final IProperty setting;
	private IPropertyListener enableListener;
	protected IMachine machine;
	private IDeviceSelectorDialog dialog;
	
	public BaseSettingEntry(IDeviceSelectorDialog dialog_, final Composite parent, IProperty setting_, int style) {
		super(parent, style);
		
		GridLayoutFactory.fillDefaults().numColumns(2).applyTo(this);

		this.dialog = dialog_;
		this.machine = dialog_.getMachine();
		
		this.setting = setting_;
		
		enableListener = new IPropertyListener() {
			
			public void propertyChanged(IProperty setting) {
				updateSetting();
				if (setting instanceof IDsrEnablementSetting) {
					dialog.warnResetNeeded();
				}
			}
		};
		setting.addListener(enableListener);
		
		addDisposeListener(new DisposeListener() {
			
			public void widgetDisposed(DisposeEvent e) {
				setting.removeListener(enableListener);
			}
		});
		
		if (setting instanceof ISettingDecorator) {
			ImageDescriptor descriptor = ((ISettingDecorator) setting).getIcon();
			Label icon = new Label(this, SWT.NONE);
			final Image iconImage = descriptor.createImage();
			icon.setImage(iconImage);
			parent.addDisposeListener(new DisposeListener() {
				
				public void widgetDisposed(DisposeEvent e) {
					iconImage.dispose();
				}
			});
			
			GridDataFactory.fillDefaults().applyTo(icon);
		} else {
			Label label = new Label(this, SWT.NONE);
			GridDataFactory.fillDefaults().applyTo(label);
		}
	}
	
	protected void updateSetting() {
		if (isDisposed())
			return;
		
		boolean enabled = !(setting instanceof ISettingProperty) || 
			((ISettingProperty) setting).isEnabled();
		
		recurseSetEnabled(this, enabled, false);
		
//		setVisible(enabled);
//		GridData data = (GridData) getLayoutData();
//		data.exclude = !enabled;
//		
//		getShell().layout(true, true);
//		Point cursz = getShell().getSize();
//		Point sz = getShell().computeSize(SWT.DEFAULT, 500, true);
//		getShell().setSize(Math.max(cursz.x, sz.x),
//				Math.max(cursz.y, sz.y));
	}

	/**
	 * @param enabled
	 */
	private void recurseSetEnabled(Control control, boolean enabled, boolean top) {
		if (!top) {
			control.setEnabled(enabled);
			if (!enabled) {
				control.setToolTipText("These entries are disabled (other devices may provide these entries)");
			}
		}
		if (control instanceof Composite) {
			for (Control c : ((Composite) control).getChildren()) {
				recurseSetEnabled(c, enabled, false);
			}
		}
	}

	abstract protected void createControls(Composite parent);
	
}