CheckedViewAttribute.java

package gueei.binding.viewAttributes.compoundButton;


import gueei.binding.Binder;
import gueei.binding.ViewAttribute;
import gueei.binding.listeners.OnCheckedChangeListenerMulticast;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

/**
 * Checked state of Compound Buttons including Check box
 * 
 * @name checked
 * @widget CompoundButton
 * @type Boolean
 * 
 * @accepts	Boolean
 * @accepts Integer 0: false other: true
 * 
 * @category simple
 * @related http://developer.android.com/reference/android/widget/CompoundButton.html
 * 
 * @author andy
 */
public class CheckedViewAttribute extends ViewAttribute<CompoundButton, Boolean>
	implements OnCheckedChangeListener{

	public CheckedViewAttribute(CompoundButton view) {
		super(Boolean.class, view, "checked");
		Binder.getMulticastListenerForView(view, OnCheckedChangeListenerMulticast.class)
			.register(this);
	}

	@Override
	protected void doSetAttributeValue(Object newValue) {
		if(getView()==null) return;
		boolean changeTo = getView().isChecked();
		if (newValue==null){
			changeTo = false;
		}
		if (newValue instanceof Boolean){
			changeTo = (Boolean)newValue;
		}
		if (newValue instanceof Number){
			changeTo = !((Number)newValue).equals(0);
		}
		if (changeTo != getView().isChecked()){
			Binder.getMulticastListenerForView(getView(), OnCheckedChangeListenerMulticast.class).nextActionIsNotFromUser();
			getView().setChecked(changeTo);
		}
	}

	@Override
	public Boolean get() {
		if(getView()==null) return null;
		return getView().isChecked();
	}

	public void onCheckedChanged(CompoundButton view, boolean checked) {
		this.notifyChanged();
	}
}