CoursesScreen.java

package org.dlect.ui;

import com.google.common.collect.ImmutableSet;
import java.util.Set;
import javax.swing.SwingUtilities;
import org.dlect.controller.MainController;
import org.dlect.controller.event.ControllerEvent;
import org.dlect.controller.event.ControllerState;
import org.dlect.controller.event.ControllerType;
import org.dlect.controller.helper.Controller;
import org.dlect.controller.helper.ControllerStateHelper;
import org.dlect.controller.helper.ControllerStateHelper.ControllerStateHelperEventID;
import org.dlect.controller.helper.subject.SubjectDataHelper.DownloadState;
import org.dlect.controller.helper.subject.SubjectInformation;
import org.dlect.controller.worker.ErrorDisplayable;
import org.dlect.controller.worker.SubjectWorker;
import org.dlect.controller.worker.download.DownloadErrorDisplayable;
import org.dlect.controller.worker.download.DownloadWorkerHelper;
import org.dlect.event.util.EventIdListings;
import org.dlect.events.Event;
import org.dlect.events.EventListener;
import org.dlect.events.wrapper.Wrappers;
import org.dlect.exception.DLectExceptionCause;
import org.dlect.model.Database;
import org.dlect.model.Lecture;
import org.dlect.model.LectureDownload;
import org.dlect.model.Semester;
import org.dlect.model.Subject;
import org.dlect.model.formatter.DownloadType;
import org.dlect.ui.decorator.DownloadButtonDotter;
import org.dlect.ui.helper.ControllerErrorBoxHelper;
import org.dlect.ui.prefs.PreferencesDialog;
import org.dlect.ui.prefs.PreferencesDialogImpl;
import org.dlect.ui.subject.MultiSubjectDisplayPanel;

import static org.dlect.controller.helper.subject.SubjectDataHelper.DownloadState.*;


/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author lee
 */
public class CoursesScreen extends javax.swing.JPanel implements
        EventListener, ErrorDisplayable, DownloadErrorDisplayable {

    private static final long serialVersionUID = 1L;

    private final MainController controller;
    private final DownloadButtonDotter dbd;
    private PreferencesDialog prefsDialog;
    private final MultiSubjectDisplayPanel msdp;

    /**
     * Creates new form CoursesScreen
     *
     * @param controller
     */
    public CoursesScreen(MainController controller) {
        this.controller = controller;
        this.msdp = new MultiSubjectDisplayPanel(controller);
        initComponents();
        dbd = new DownloadButtonDotter(downloadAllButton);
        dbd.start();
        Wrappers.addSwingListenerTo(this, controller, Database.class, Semester.class, Subject.class, Lecture.class, LectureDownload.class, Controller.class, ControllerStateHelper.class);
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        bottomPanel = new javax.swing.JPanel();
        jSeparator1 = new javax.swing.JSeparator();
        preferencesButton = new javax.swing.JButton();
        downloadAllButton = new javax.swing.JButton();
        coursesScrollPane = new javax.swing.JScrollPane();
        javax.swing.JPanel scrollContainerPanel = new javax.swing.JPanel();
        javax.swing.JPanel subjectDisplayPanel = msdp;

        setMinimumSize(new java.awt.Dimension(400, 300));
        setLayout(new java.awt.GridBagLayout());

        bottomPanel.setLayout(new java.awt.GridBagLayout());
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = 10;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        bottomPanel.add(jSeparator1, gridBagConstraints);

        preferencesButton.setMnemonic('p');
        preferencesButton.setText("Preferences");
        preferencesButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                preferencesButtonActionPerformed(evt);
            }
        });
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        bottomPanel.add(preferencesButton, gridBagConstraints);

        downloadAllButton.setText("Please Wait");
        downloadAllButton.setEnabled(false);
        downloadAllButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                downloadAllButtonActionPerformed(evt);
            }
        });
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 9;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
        bottomPanel.add(downloadAllButton, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        add(bottomPanel, gridBagConstraints);

        coursesScrollPane.setBorder(javax.swing.BorderFactory.createEmptyBorder(0, 0, 0, 0));

        scrollContainerPanel.setLayout(new java.awt.GridBagLayout());
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        scrollContainerPanel.add(subjectDisplayPanel, gridBagConstraints);

        coursesScrollPane.setViewportView(scrollContainerPanel);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        add(coursesScrollPane, gridBagConstraints);
    }// </editor-fold>//GEN-END:initComponents

    private void downloadAllButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_downloadAllButtonActionPerformed
        DownloadWorkerHelper.downloadAllSelectedIn(this, controller, msdp.getShownSubjects());
    }//GEN-LAST:event_downloadAllButtonActionPerformed

    private void preferencesButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_preferencesButtonActionPerformed
        if (prefsDialog == null) {
            prefsDialog = new PreferencesDialogImpl(SwingUtilities.getWindowAncestor(this), controller);
            prefsDialog.setLocationRelativeTo(this);
        }
        prefsDialog.setLocationByPlatform(true);
        prefsDialog.setVisible(true);
    }//GEN-LAST:event_preferencesButtonActionPerformed
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JPanel bottomPanel;
    private javax.swing.JScrollPane coursesScrollPane;
    private javax.swing.JButton downloadAllButton;
    private javax.swing.JSeparator jSeparator1;
    private javax.swing.JButton preferencesButton;
    // End of variables declaration//GEN-END:variables

    private void updateButtonState() {
        // TODO(Later) update this method to react to events better.
        ControllerStateHelper csh = controller.getControllerStateHelper();

        if (!csh.hasCompleted(ControllerType.SUBJECT)) {
            dbd.updateAndStart("Please Wait");
            return;
        }

        Set<Subject> shown = ImmutableSet.copyOf(msdp.getShownSubjects());
        for (Subject subject : shown) {
            if (csh.isDownloading(subject)) {
                dbd.updateAndStart("Downloading");
                return;
            }
            if (!csh.hasCompleted(ControllerType.LECTURE, subject)) {
                dbd.updateAndStart("Loading Data");
                return;
            }
        }

        if (shown.isEmpty()) {
            dbd.stop();
            downloadAllButton.setText("No Subjects Shown.");
            downloadAllButton.setEnabled(false);
            downloadAllButton.setPreferredSize(null);
            return;
        }

        int notDownloaded = 0;
        int selected = 0;

        for (Subject subject : shown) {
            SubjectInformation i = new SubjectInformation();
            i.setSubject(subject);
            // TODO(Later) simplify this by storing the information and invalidating it as events come in.
            selected += i.getDownloadsSelected();
            notDownloaded += i.getNotDownloadedCount();
            if (SubjectInformation.getDownloadedStatusFromCounts(notDownloaded, selected) == NOT_ALL_DOWNLOADED) {
                // >1 selected and >1 not downloaded.
                break;
            }
        }

        DownloadState s = SubjectInformation.getDownloadedStatusFromCounts(notDownloaded, selected);

        switch (s) {
            case ALL_DOWNLOADED:
                dbd.stop();
                downloadAllButton.setText("All Downloaded");
                downloadAllButton.setEnabled(false);
                downloadAllButton.setPreferredSize(null);
                break;
            case NONE_SELECTED:
                dbd.stop();
                downloadAllButton.setText("None Selected");
                downloadAllButton.setEnabled(false);
                downloadAllButton.setPreferredSize(null);
                break;
            default:
                dbd.stop();
                downloadAllButton.setText("Download All");
                downloadAllButton.setPreferredSize(null);
        }
    }

    @Override
    public void processEvent(Event e) {
        if (EventIdListings.DOWNLOAD_UPDATE_EVENT_IDS.contains(e.getEventID())) {
            updateButtonState();
        } else if (e.getEventID().equals(ControllerStateHelperEventID.DOWNLOAD)) {
            updateButtonState();
        } else if (e.getEventID().equals(ControllerStateHelperEventID.CONTROLLER)) {
            updateButtonState();
        }

        if (e instanceof ControllerEvent) {
            ControllerEvent ce = (ControllerEvent) e;
            if (ce.getEventID() == ControllerType.LOGIN
                && ce.getAfter() == ControllerState.COMPLETED) {
                new SubjectWorker(this, controller).execute();
            }
        }
    }

    @Override
    public void showErrorBox(ControllerType type, Object parameter, DLectExceptionCause get) {
        // TODO(Later) show try again button if type==Subject && get==NO_CONN.
        ControllerErrorBoxHelper.showErrorBox(this, type, parameter, get);
    }

    @Override
    public void showDownloadError(Subject subject, Lecture lecture, DownloadType downloadType, DLectExceptionCause failureCause) {
        ControllerErrorBoxHelper.showDownloadError(this, subject, lecture, downloadType, failureCause);
    }

}