org.eclipse.osbp.runtime.web.vaadin.components/src/org/eclipse/osbp/runtime/web/vaadin/components/fields/filter2/CompareComponent.java

package org.eclipse.osbp.runtime.web.vaadin.components.fields.filter2;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.Locale;

import javax.annotation.PostConstruct;

import org.eclipse.osbp.ecview.core.common.context.ILocaleChangedService;
import org.eclipse.osbp.ecview.core.common.context.IViewContext;
import org.eclipse.osbp.runtime.common.i18n.II18nService;
import org.eclipse.osbp.ui.api.themes.EnumCssClass;
import org.eclipse.osbp.ui.api.themes.IThemeResourceService;
import org.eclipse.osbp.ui.api.themes.IThemeResourceService.ThemeResourceType;

import com.vaadin.data.Container.Filter;
import com.vaadin.ui.Component;
import com.vaadin.ui.CustomComponent;

@SuppressWarnings("serial")
public abstract class CompareComponent extends CustomComponent
		implements ISingleFilterComponent, ILocaleChangedService.LocaleListener {

	protected II18nService i18nService;
	protected IThemeResourceService themeResourceService;

	Component mainLayout;

	protected final String propertyId;
	protected final IViewContext viewContext;

	// used for decimal fields
	Class<? extends Number> type;

	public CompareComponent(String propertyId, IViewContext viewContext) {
		this.propertyId = propertyId;
		this.viewContext = viewContext;
	}

	public CompareComponent(String propertyId, Class<? extends Number> type, IViewContext viewContext) {
		this.propertyId = propertyId;
		this.type = type;
		this.viewContext = viewContext;
	}

	@PostConstruct
	public void init() {
		
		setStyleName(EnumCssClass.BOX.styleName());
		
		i18nService = viewContext.getService(II18nService.ID);
		themeResourceService = viewContext.getService(IThemeResourceService.ID);

		ILocaleChangedService service = viewContext.getService(ILocaleChangedService.class.getName());
		service.addLocaleListener(this);

		mainLayout = createMainLayout();
		mainLayout.setSizeFull();
		
		setCompositionRoot(mainLayout);
	}
	
	protected String getCaptionInternal() {
		return Util.getCaption(i18nService, propertyId, propertyId, getLocale());
	}
	
	@Override
	public void localeChanged(Locale locale) {
		setLocale(locale);
		updateCaptions();
	}
	
	protected abstract void updateCaptions();

	protected abstract Component createMainLayout();

	/**
	 * Returns a proper filter for this component.
	 * 
	 * @return
	 */
	public abstract Filter getFilter();

	public void dispose() {
		ILocaleChangedService service = viewContext.getService(ILocaleChangedService.class.getName());
		service.removeLocaleListener(this);
	}

	public abstract static class AbstractCompareBean {
		protected final PropertyChangeSupport changeSupport = new PropertyChangeSupport(this);

		public void addPropertyChangeListener(String property, PropertyChangeListener listener) {
			changeSupport.addPropertyChangeListener(property, listener);
		}

		private final String property;

		private String caption;

		public AbstractCompareBean(String property) {
			this.property = property;
		}

		public String getProperty() {
			return property;
		}

		public String getCaption() {
			return caption;
		}

		public void setCaption(String caption) {
			changeSupport.firePropertyChange("caption", this.caption, this.caption = caption);
		}

	}
}