VilleContent.java

package fi.utu.ville.exercises.model;

import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.ui.VerticalLayout;

public abstract class VilleContent extends VerticalLayout implements View {
	
	private static final long serialVersionUID = 1L;
	private VilleUI ui;
	
	public VilleContent(VilleUI ui) {
		init(ui);
	}
	
	public void init(VilleUI ui) {
		this.ui = ui;
	}
	
	public abstract void doLayout();
	
	public abstract boolean isOkToExit();
	
	public DialogWithConfirm getConfirmExitDialog() {
		return null;
	}
	
	public VilleUI getVilleUI() {
		return ui;
	}
	
	protected boolean changeContent(VilleContent content) {
		return ui.changeContent(content);
	}
	
	/**
	 * The return value must be unique and suitable as URI (no spacing etc.).
	 * 
	 * @return Unique URI
	 */
	public abstract String getViewName();
	
	/* Comes from interface View */
	@Override
	public void enter(ViewChangeEvent event) {
	}
	
	/**
	 * Returns prettified information about the content suitable for displaying to users or in error reports. Must not contain sensitive information (e.g.
	 * usernames, passwords)
	 * 
	 * @return A String containing information about the content or toString() if there is nothing interesting to show.
	 */
	public String getPrettyInformation() {
		return toString();
	}
	
}