AcrobatDesignerLauncher.java

package edu.stanford.hci.r3.tools.design.acrobat;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetAdapter;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.List;
import java.util.TooManyListenersException;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

import edu.stanford.hci.r3.PaperToolkit;
import edu.stanford.hci.r3.util.WindowUtils;
import edu.stanford.hci.r3.util.components.BufferedImagePanel;
import edu.stanford.hci.r3.util.graphics.GraphicsUtils;
import edu.stanford.hci.r3.util.graphics.ImageCache;

public class AcrobatDesignerLauncher {

        private static BufferedImagePanel activeArea;

        private static DropTarget dropTarget;

        private static DropTargetAdapter dropTargetAdapter;

        private static FileTransferHandler fileTransferHandler;

        private static final Font FONT = new Font("Trebuchet MS", Font.BOLD, 28);

        private static JFrame frame;

        private static JPanel mainPanel;

        private static List<File> onlyPDFs;

        private static BufferedImage pdfLogo;

        private static final Color TRANSLUCENT_GRAY = new Color(50, 50, 50, 88);

        private static Component getActiveArea() {
                if (activeArea == null) {
                        activeArea = new BufferedImagePanel() {
                                public void paintComponent(Graphics g) {
                                        super.paintComponent(g);
                                        if (onlyPDFs == null) {
                                                return;
                                        }

                                        // draw list of file names
                                        final Graphics2D g2d = (Graphics2D) g;
                                        g2d.setRenderingHints(GraphicsUtils.getBestRenderingHints());
                                        g2d.setColor(TRANSLUCENT_GRAY);
                                        g2d.setFont(FONT);
                                        int stringY = (int) ((activeArea.getHeight() - onlyPDFs.size() * 40) / 2.0);
                                        for (File f : onlyPDFs) {
                                                g2d.drawString(f.getName(), 50, stringY);
                                                stringY += 50;
                                        }
                                }
                        };
                        activeArea.setBorder(BorderFactory.createMatteBorder(10, 10, 10, 10, Color.LIGHT_GRAY));
                        activeArea.setBackground(Color.DARK_GRAY);
                        fileTransferHandler = new FileTransferHandler();
                        activeArea.setTransferHandler(fileTransferHandler);

                        try {
                                dropTarget = new DropTarget();
                                dropTarget.setComponent(activeArea);
                                dropTarget.addDropTargetListener(getDropTargetAdapter());
                        } catch (TooManyListenersException e) {
                                e.printStackTrace();
                        }

                        pdfLogo = ImageCache.loadBufferedImage(AcrobatDesignerLauncher.class
                                        .getResource("/icons/pdfIcon.png"));
                }
                return activeArea;
        }

        private static DropTargetAdapter getDropTargetAdapter() {
                if (dropTargetAdapter == null) {
                        dropTargetAdapter = new DropTargetAdapter() {
                                public void dragEnter(DropTargetDragEvent dtde) {
                                        frame.setAlwaysOnTop(true);
                                        frame.setAlwaysOnTop(false);

                                        // System.out.println(FileTransferHandler.hasFileFlavor(dtde.getCurrentDataFlavors()));
                                        // System.out.println(activeArea.getTransferHandler());
                                        // if there are PDFs in the list...
                                        onlyPDFs = fileTransferHandler.getOnlyPDFs(activeArea, dtde.getTransferable());
                                        // show the icon
                                        if (onlyPDFs.size() > 0) {
                                                activeArea.setBackground(Color.WHITE);
                                                activeArea.setImageCentered(pdfLogo);
                                        }
                                }

                                public void dragExit(DropTargetEvent dte) {
                                        hideBackground();
                                }

                                public void drop(DropTargetDropEvent dtde) {
                                        dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
                                        fileTransferHandler.importData(activeArea, dtde.getTransferable());

                                        try {
                                                Thread.sleep(500);
                                        } catch (InterruptedException e) {
                                                e.printStackTrace();
                                        }
                                        // hide background
                                        hideBackground();
                                }

                                private void hideBackground() {
                                        activeArea.setBackground(Color.DARK_GRAY);
                                        activeArea.setImage(null);
                                        onlyPDFs = null;
                                }
                        };
                }
                return dropTargetAdapter;
        }

        private static Component getLabel() {
                JLabel label = new JLabel("<html>Drag a PDF on to the active area below to start the "
                                + "R3 Acrobat Designer. You must have Acrobat Pro <br/>on your system, "
                                + "with the R3 plugin installed.</html>");
                label.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
                return label;
        }

        private static Container getMainPanel() {
                if (mainPanel == null) {
                        mainPanel = new JPanel();
                        mainPanel.setLayout(new BorderLayout());
                        mainPanel.add(getLabel(), BorderLayout.NORTH);
                        mainPanel.add(getActiveArea(), BorderLayout.CENTER);
                }
                return mainPanel;
        }

        public static void main(String[] args) {
                start();
        }

        public static JFrame start() {
                PaperToolkit.initializeLookAndFeel();
                if (frame == null) {
                        frame = new JFrame("Acrobat Designer Launcher");
                        frame.setContentPane(getMainPanel());
                        frame.setSize(640, 480);
                        frame.setLocation(WindowUtils.getWindowOrigin(frame, WindowUtils.DESKTOP_CENTER));
                        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
                }
                frame.setVisible(true);
                return frame;
        }
}

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