DifferProgramTab.java

package cz.nkp.differ.gui.tabs;

import com.vaadin.ui.Button;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Layout;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.LoginForm.LoginEvent;
import com.vaadin.ui.LoginForm.LoginListener;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

import cz.nkp.differ.DifferApplication;
import cz.nkp.differ.gui.components.DifferProgramTabButtonPanel;
import cz.nkp.differ.gui.components.LoginRegisterComponent;
import cz.nkp.differ.gui.components.UserFilesWidget;
import cz.nkp.differ.gui.windows.MainDifferWindow;
import cz.nkp.differ.model.Image;
import cz.nkp.differ.model.User;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

/**
 * The main application view.
 * @author Joshua Mabrey
 * @author Vaclav Rosecky
 *
 * Mar 30, 2012
 */
@SuppressWarnings("serial")
public class DifferProgramTab extends HorizontalLayout {

    private static final String GUEST_USERNAME = "guest";
    private CustomComponent loginPanel;
    private Layout loggedInView, loggedOutView, customViewWrapper;
    private Button customLayoutBackButton;
    private UserFilesWidget fileSelector1, fileSelector2;
    private final DifferProgramTab this_internal = this;
    private MainDifferWindow mainWindow = null;
    //Used by button listener to reference DifferProgramTab object indirectly

    public DifferProgramTab(MainDifferWindow window) {
        this.mainWindow = window;
        if (DifferApplication.getCurrentApplication().getLoggedUser() == null) {
            setLoggedOutView();//Start the program logged out
        } else {
            setLoggedInView();
        }
    }

    private void setLoggedInView() {
        if (loggedInView == null) {
            loggedInView = new HorizontalLayout();
            fileSelector1 = new UserFilesWidget(false);
            fileSelector2 = new UserFilesWidget(true);
            List<UserFilesWidget> widgets = new ArrayList<UserFilesWidget>();
            widgets.add(fileSelector1);
            widgets.add(fileSelector2);
            mainWindow.setUserFilesWidgets(widgets);
            loggedInView.addComponent(fileSelector1);
            loggedInView.addComponent(fileSelector2);
            loggedInView.addComponent(new DifferProgramTabButtonPanel(this, mainWindow));
            loggedInView.setSizeUndefined();
        }
        this.removeAllComponents();
        this.addComponent(loggedInView);
        this.setSizeUndefined();
    }

    public void setLoggedOutView() {
        if (loggedOutView == null) {
            final DifferProgramTab parent = this;
            loggedOutView = new VerticalLayout();
            loginPanel = new LoginRegisterComponent(mainWindow, new LoginListener() {

                @Override
                public void onLogin(LoginEvent event) {
                    parent.login(event.getLoginParameter("username"), event.getLoginParameter("password"));
                }
            });
            Button guestLogin = new Button("Guest Login");
            guestLogin.addListener(new Listener() {

                @Override
                public void componentEvent(Event event) {
                    parent.login(GUEST_USERNAME, null);
                }
            });
            loggedOutView.addComponent(loginPanel);
            loggedOutView.addComponent(guestLogin);
        }
        this.removeAllComponents();
        this.addComponent(loggedOutView);
        this.setSizeUndefined();
        this.loggedInView = null;
    }

    private void login(String username, String password) {
        try {
            User user = null;
            DifferApplication app = DifferApplication.getCurrentApplication();
            if (username.equals(GUEST_USERNAME)) {
                user = DifferApplication.getUserManager().getUserDAO().getUserByUserName("guest");
            } else {
                user = DifferApplication.getUserManager().attemptLogin(username, password);
            }
            app.setLoggedUser(user);
            //User user = UserManager.getInstance().attemptLogin(event.getLoginParameter("username"), event.getLoginParameter("password"));
            setLoggedInView();
        } catch (Exception ex) {
            DifferApplication.getCurrentApplication().getMainWindow().showNotification("Login Problem",
                    "<br/>" + ex.getMessage(), Window.Notification.TYPE_WARNING_MESSAGE);

        }
    }

    public void setCustomView(Layout layout) {
        if (customViewWrapper == null) {
            customViewWrapper = new VerticalLayout();
            customLayoutBackButton = new Button("Back");
            customLayoutBackButton.addListener(customViewWrapperBackButtonListener);
        }
        customViewWrapper.removeAllComponents();
        customViewWrapper.addComponent(customLayoutBackButton);
        customViewWrapper.addComponent(layout);
        customViewWrapper.setSizeUndefined();
        this.removeAllComponents();
        this.addComponent(customViewWrapper);
        this.setSizeUndefined();
    }

    public Image[] getSelectedImages() {
        Set<Image> images1 = fileSelector1.getSelectedImages();
        Set<Image> images2 = fileSelector2.getSelectedImages();
        if (images1 == null) {
            images1 = Collections.emptySet();
        }
        if (images2 == null) {
            images2 = Collections.emptySet();
        }
        Image[] result = new Image[images1.size() + images2.size()];
        int index = 0;
        for (Image image : images1) {
            result[index] = image;
            index++;
        }
        for (Image image : images2) {
            result[index] = image;
            index++;
        }
        return result;
    }
    private Button.ClickListener customViewWrapperBackButtonListener = new Button.ClickListener() {

        @Override
        public void buttonClick(ClickEvent event) {
            this_internal.removeAllComponents();
            this_internal.setLoggedInView();
        }
    };
}