package org.eclipse.e4.xwt.internal.utils;
import java.util.HashMap;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.e4.xwt.IEventGroup;
import org.eclipse.e4.xwt.IObservableValueListener;
import org.eclipse.e4.xwt.XWT;
import org.eclipse.e4.xwt.javabean.metadata.properties.EventProperty;
import org.eclipse.e4.xwt.metadata.IMetaclass;
import org.eclipse.e4.xwt.metadata.IProperty;
import org.eclipse.e4.xwt.metadata.ModelUtils;
import org.eclipse.swt.widgets.Event;
public class ObservableValueManager implements IObservableValueListener {
protected HashMap<String, IObservableValue> map;
protected Object host;
public ObservableValueManager(Object host) {
this.host = host;
}
public Object getHost() {
return host;
}
public void changeValueHandle(Object object, Event event){
// TODO the cast is not clean.
EventProperty property = (EventProperty) object;
IObservableValue value = map.get(property.getName());
if (value != null) {
Boolean oldValue = (Boolean) value.getValue();
if (oldValue == null) {
oldValue = false;
}
value.setValue(!oldValue);
}
IMetaclass metaclass = XWT.getMetaclass(host);
// TODO this conversion should be simplied
String eventName = ModelUtils.normalizePropertyName(property.getEvent().getName());
IEventGroup eventGroup = metaclass.getEventGroup(eventName);
if (eventGroup != null) {
eventGroup.fireEvent(this, property);
}
}
public void registerValue(IProperty property, IObservableValue observableValue) {
if (map == null) {
map = new HashMap<String, IObservableValue>();
}
map.put(property.getName(), observableValue);
IMetaclass metaclass = XWT.getMetaclass(host);
// TODO it is not clean.
EventProperty eventProperty = (EventProperty) property;
// TODO this conversion should be simplied
String eventName = ModelUtils.normalizePropertyName(eventProperty.getEvent().getName());
IEventGroup eventGroup = metaclass.getEventGroup(eventName);
if (eventGroup != null) {
eventGroup.registerEvent(this, property);
}
}
public IObservableValue getValue(IProperty property) {
if (map == null) {
return null;
}
return map.get(property.getName());
}
}