CourseHeader.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.dlect.ui.panel;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import org.dlect.controller.MainController;
import org.dlect.controller.helper.ControllerStateHelper;
import org.dlect.controller.helper.subject.SubjectInformation;
import org.dlect.events.Event;
import org.dlect.events.EventListener;
import org.dlect.events.wrapper.Wrappers;
import org.dlect.model.Lecture;
import org.dlect.model.LectureDownload;
import org.dlect.model.Subject;
import org.dlect.model.Subject.SubjectEventID;
import org.dlect.ui.decorator.ArrowBorder;

import static org.dlect.event.util.EventIdListings.DOWNLOAD_UPDATE_EVENT_IDS;

/**
 *
 * @author lee
 */
public class CourseHeader extends javax.swing.JPanel implements EventListener {

    private static final Color COMPLETED_PROGRESS_COLOR = new Color(0x7295E6);
    private static final Color ALL_COMPLETED_PROGRESS_COLOR = new Color(0x68ED68);
    private static final Color DOWNLOADING_PROGRESS_COLOR = new Color(0xF9CA6D);
    private static final long serialVersionUID = 1L;

    private Subject subject;
    private double progress = 0;
    private double dlInProgress = 0;
    private final MainController ctl;

    /**
     * Creates new form CourseHeader
     *
     * @param ctl
     */
    public CourseHeader(MainController ctl) {
        initComponents();
        this.ctl = ctl;
        Wrappers.addSwingListenerTo(this, ctl, ControllerStateHelper.class);
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D) g;
        final int w = this.getWidth();
        final int h = this.getHeight();
        final double p = progress;
        final double dp = dlInProgress;
        if (p >= 0) {
            if (p >= 1) {
                g2.setColor(ALL_COMPLETED_PROGRESS_COLOR);
                g2.fillRect(0, 0, w, h);
            } else {
                g2.setColor(COMPLETED_PROGRESS_COLOR);
                g2.fillRect(0, 0, (int) (w * p), h);
                if (dp > 0) {
                    g2.setColor(DOWNLOADING_PROGRESS_COLOR);
                    g2.fillRect((int) (w * p), 0, (int) (w * dp), h);
                }
            }
        }
        g2.setColor(this.getBackground().darker());
        g2.drawLine(0, h - 1, w, h - 1);
        g2.setColor(this.getBackground().brighter());
        g2.drawLine(0, 0, w, 0);
    }

    /**
     * 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;

        courseNameLabel = new javax.swing.JLabel();
        lectureCountLabel = new javax.swing.JLabel();

        setBorder(new ArrowBorder());
        setMaximumSize(new java.awt.Dimension(2147483647, 28));
        setMinimumSize(new java.awt.Dimension(38, 28));
        setPreferredSize(new java.awt.Dimension(38, 28));
        setLayout(new java.awt.GridBagLayout());

        courseNameLabel.setText("Course Name");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.VERTICAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.weightx = 0.5;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 5, 0, 0);
        add(courseNameLabel, gridBagConstraints);

        lectureCountLabel.setText("No Lecures");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.VERTICAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
        gridBagConstraints.weightx = 0.5;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 0, 5);
        add(lectureCountLabel, gridBagConstraints);
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel courseNameLabel;
    private javax.swing.JLabel lectureCountLabel;
    // End of variables declaration//GEN-END:variables

    public void setSubject(Subject subject) {
        if (this.subject == subject) {
            return;
        }
        if (this.subject != null) {
            this.subject.removeListener(this);
        }

        this.subject = subject;
        Wrappers.addSwingListenerTo(this, subject, Subject.class, Lecture.class, LectureDownload.class);

        refresh();
    }

    @Override
    public void processEvent(Event e) {
        if (subject == null) {
            return;
        }
        if (e.getEventID().equals(SubjectEventID.NAME) || e.getEventID().equals(SubjectEventID.LECTURE)) {
            updateDescriptions();
        }
        if (DOWNLOAD_UPDATE_EVENT_IDS.contains(e.getEventID())) {
            updateNums(ctl.getSubjectDataHelper().getSubjectInformation(e));
        }
    }

    public void refresh() {
        updateNums(new SubjectInformation());
        updateDescriptions();
    }

    private void updateNums(SubjectInformation i) {
        if (subject == null) {
            return;
        }
        i.setSubject(subject);
        updateDescriptions();

        int downloadsInProgress = ctl.getControllerStateHelper().getDownloadingIn(subject).size();
        int numberDownloaded = i.getDownloadedCount();
        int totalDownloads = i.getDownloadsSelected();

        if (totalDownloads > 0) {
            progress = ((double) numberDownloaded) / totalDownloads;
            dlInProgress = ((double) downloadsInProgress) / totalDownloads;
        } else {
            progress = -1;
            dlInProgress = 0;
        }
        repaint();
    }

    private void updateDescriptions() {
        final int numLectures = subject.getLectures().size();
        if (numLectures > 0) {
            lectureCountLabel.setText(numLectures + " Lecture" + (numLectures == 1 ? "" : "s") + " Found");
        } else {
            lectureCountLabel.setText("No Lectures Found");
        }
        courseNameLabel.setText(subject.getName());
    }

}