package org.apache.fop.viewer;

/*
  originally contributed by
  Juergen Verwohlt: Juergen.Verwohlt@jCatalog.com,
  Rainer Steinkuhle: Rainer.Steinkuhle@jCatalog.com,
  Stanislav Gorkhover: Stanislav.Gorkhover@jCatalog.com
 */

import java.awt.*;
import java.awt.print.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;

import javax.swing.*;

import org.apache.fop.layout.*;
import org.apache.fop.render.awt.*;

/**
 * Frame and User Interface for Preview
 */
public class PreviewDialog extends JFrame implements ProgressListener {

    protected Translator res;

    protected int currentPage = 0;
    protected int pageCount = 0;

    protected AWTRenderer renderer;

    protected IconToolBar toolBar = new IconToolBar();

    protected Command printAction;
    protected Command firstPageAction;
    protected Command previousPageAction;
    protected Command nextPageAction;
    protected Command lastPageAction;

    protected JLabel zoomLabel = new JLabel(); //{public float getAlignmentY() { return 0.0f; }};
    protected JComboBox scale = new JComboBox() {
	    public float getAlignmentY() { return 0.5f; }};

    protected JScrollPane previewArea = new JScrollPane();
    // protected JLabel statusBar = new JLabel();
    protected JPanel statusBar = new JPanel();
    protected GridBagLayout statusBarLayout = new GridBagLayout();

    protected JLabel statisticsStatus = new JLabel();
    protected JLabel processStatus = new JLabel();
    protected JLabel infoStatus = new JLabel();
    protected JLabel previewImageLabel = new JLabel();

    /**
     * Create a new PreviewDialog that uses the given renderer and translator.
     *
     * @param aRenderer the to use renderer
     * @param aRes the to use translator
     */
    public PreviewDialog(AWTRenderer aRenderer, Translator aRes) {
	res = aRes;
	renderer = aRenderer;

	printAction = new Command(res.getString("Print"), "Print") {
		public void doit() {print();}};
	firstPageAction =
	    new Command(res.getString("First page"), "firstpg") {
		public void doit() {goToFirstPage(null);}};
	previousPageAction =
	    new Command(res.getString("Previous page"), "prevpg") {
		    public void doit() {goToPreviousPage(null);}};
	nextPageAction  = new Command(res.getString("Next page"),"nextpg") {
		public void doit() {goToNextPage(null);}};
	lastPageAction = new Command(res.getString("Last page"), "lastpg") {
		public void doit() {goToLastPage(null);}};

	setDefaultCloseOperation(DISPOSE_ON_CLOSE);
	this.setSize(new Dimension(379, 476));
	previewArea.setMinimumSize(new Dimension(50, 50));

	this.setTitle("FOP: AWT-" + res.getString("Preview"));

	scale.addItem("25");
	scale.addItem("50");
	scale.addItem("75");
	scale.addItem("100");
	scale.addItem("150");
	scale.addItem("200");

	scale.setMaximumSize(new Dimension(80, 24));
	scale.setPreferredSize(new Dimension(80, 24));

	scale.addActionListener(new java.awt.event.ActionListener() {
		public void actionPerformed(ActionEvent e) {
		    scale_actionPerformed(e);
		}
	    });

	scale.setSelectedItem("100");
	renderer.setScaleFactor(100.0);

	zoomLabel.setText(res.getString("Zoom"));

	this.setJMenuBar(setupMenue());

	this.getContentPane().add(toolBar, BorderLayout.NORTH);

	toolBar.add(printAction);
	toolBar.addSeparator();
	toolBar.add(firstPageAction);
	toolBar.add(previousPageAction);
	toolBar.add(nextPageAction);
	toolBar.add(lastPageAction);
	toolBar.addSeparator();
	toolBar.add(zoomLabel, null);
	toolBar.addSeparator();
	toolBar.add(scale, null);

	this.getContentPane().add(previewArea, BorderLayout.CENTER);
	this.getContentPane().add(statusBar, BorderLayout.SOUTH);

	statisticsStatus.setBorder(BorderFactory.createEtchedBorder());
	processStatus.setBorder(BorderFactory.createEtchedBorder());
	infoStatus.setBorder(BorderFactory.createEtchedBorder());

	statusBar.setLayout(statusBarLayout);

	processStatus.setPreferredSize(new Dimension(200, 21));
	statisticsStatus.setPreferredSize(new Dimension(100, 21));
	infoStatus.setPreferredSize(new Dimension(100, 21));
	processStatus.setMinimumSize(new Dimension(200, 21));
	statisticsStatus.setMinimumSize(new Dimension(100, 21));
	infoStatus.setMinimumSize(new Dimension(100, 21));
	statusBar.add(processStatus,
		      new GridBagConstraints(0, 0, 2, 1, 2.0, 0.0,
					     GridBagConstraints.CENTER,
					     GridBagConstraints.HORIZONTAL,
					     new Insets(0, 0, 0, 5), 0, 0));
	statusBar.add(statisticsStatus,
		      new GridBagConstraints(2, 0, 1, 2, 1.0, 0.0,
					     GridBagConstraints.CENTER,
					     GridBagConstraints.HORIZONTAL,
					     new Insets(0, 0, 0, 5), 0, 0));
	statusBar.add(infoStatus,
		      new GridBagConstraints(3, 0, 1, 1, 1.0, 0.0,
					     GridBagConstraints.CENTER,
					     GridBagConstraints.HORIZONTAL,
					     new Insets(0, 0, 0, 0), 0, 0));

	previewArea.getViewport().add(previewImageLabel);
	showPage();
    }

    /**
     * Create a new menubar to be shown in this window.
     *
     * @return the newly created menubar
     */
    private JMenuBar setupMenue() {
	JMenuBar  menuBar;
	JMenuItem menuItem;
	JMenu     menu;
	JMenu     subMenu;

	menuBar = new JMenuBar();
	menu = new JMenu(res.getString("File"));
        subMenu = new JMenu("OutputFormat");
	subMenu.add(new Command("mHTML"));
	subMenu.add(new Command("mPDF"));
	subMenu.add(new Command("mRTF"));
	subMenu.add(new Command("mTEXT"));
        // menu.add(subMenu);
        // menu.addSeparator();
        menu.add(new Command(res.getString("Print")) {
		public void doit(){print();}});
        menu.addSeparator();
        menu.add(new Command(res.getString("Exit")) {
		public void doit() {dispose();}} );
	menuBar.add(menu);
	menu = new JMenu(res.getString("View"));
        menu.add(new Command(res.getString("First page")) {
		public void doit() {goToFirstPage(null);}} );
        menu.add(new Command(res.getString("Previous page")) {
		public void doit() {goToPreviousPage(null);}} );
        menu.add(new Command(res.getString("Next page")) {
		public void doit() {goToNextPage(null);}} );
        menu.add(new Command(res.getString("Last page")) {
		public void doit() {goToLastPage(null);}} );
        menu.add(new Command(res.getString("Go to Page") + " ...") {
		public void doit() {goToPage(null);}} );
        menu.addSeparator();
        subMenu = new JMenu(res.getString("Zoom"));
	subMenu.add(new Command("25%") {
		public void doit() {setScale(25.0);}} );
	subMenu.add(new Command("50%") {
		public void doit() {setScale(50.0);}} );
	subMenu.add(new Command("75%") {
		public void doit() {setScale(75.0);}} );
	subMenu.add(new Command("100%") {
		public void doit() {setScale(100.0);}} );
	subMenu.add(new Command("150%") {
		public void doit() {setScale(150.0);}} );
	subMenu.add(new Command("200%") {
		public void doit() {setScale(200.0);}} );
        menu.add(subMenu);
        menu.addSeparator();
        menu.add(new Command(res.getString("Default zoom")) {
		public void doit() {setScale(100.0);}} );
	menuBar.add(menu);
	menu = new JMenu(res.getString("Help"));
        menu.add(new Command(res.getString("Index")));
        menu.addSeparator();
        menu.add(new Command(res.getString("Introduction")));
        menu.addSeparator();
        menu.add(new Command(res.getString("About")){
		public void doit() {startHelpAbout(null);}} );
	menuBar.add(menu);
	return menuBar;
    }

    //Aktion Hilfe | Info durchgeführt

    /**
     * Show the About box
     *
     * @param e a value of type 'ActionEvent'
     */
    public void startHelpAbout(ActionEvent e) {
	PreviewDialogAboutBox dlg = new PreviewDialogAboutBox(this);
	Dimension dlgSize = dlg.getPreferredSize();
	Dimension frmSize = getSize();
	Point loc = getLocation();
	dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x,
			(frmSize.height - dlgSize.height) / 2 + loc.y);
	dlg.setModal(true);
	dlg.show();
    }

    /**
     * Change the current visible page
     *
     * @param number the page number to go to
     */
    private void goToPage(int number) {
	currentPage = number;
	renderer.setPageNumber(number);
	showPage();
    }

    /**
     * Shows the previous page.
     */
    private void goToPreviousPage(ActionEvent e) {
	if (currentPage <= 0)
	    return;
	currentPage--;
	goToPage(currentPage);
    }


    /**
     * Shows the next page.
     */
    private void goToNextPage(ActionEvent e) {
	if (currentPage >= pageCount - 1)
	    return;
	currentPage++;
	goToPage(currentPage);
    }

    /**
     * Shows the last page.
     */
    private void goToLastPage(ActionEvent e) {

	if (currentPage == pageCount - 1) return;
	currentPage = pageCount - 1;

	goToPage(currentPage);
    }

    /**
     * Shows a page by number.
     */
    private void goToPage(ActionEvent e) {

    GoToPageDialog d = new GoToPageDialog(this, res.getString("Go to Page"), true);
    d.setLocation((int) getLocation().getX() + 50, (int) getLocation().getY() + 50);
    d.show();
    currentPage = d.getPageNumber();

	if (currentPage < 1 || currentPage > pageCount)
      return;

    currentPage--;

	goToPage(currentPage);
    }

    /**
     * Shows the first page.
     */
    private void goToFirstPage(ActionEvent e) {
	if (currentPage == 0)
	    return;
	currentPage = 0;
	goToPage(currentPage);
    }

    private void print() {
	PrinterJob pj = PrinterJob.getPrinterJob();
	// Nicht nötig, Pageable get a Printable.
	// pj.setPrintable(renderer);
	pj.setPageable(renderer);

	if (pj.printDialog()) {
	    try {
		pj.print();
	    } catch(PrinterException pe) {
		pe.printStackTrace();
	    }
	}
    }

    public void setScale(double scaleFactor) {

	if (scaleFactor == 25.0)
	    scale.setSelectedIndex(0);
	else if (scaleFactor == 50.0)
	    scale.setSelectedIndex(1);
	else if (scaleFactor == 75.0)
	    scale.setSelectedIndex(2);
	else if (scaleFactor == 100.0)
	    scale.setSelectedIndex(3);
	else if (scaleFactor == 150.0)
	    scale.setSelectedIndex(4);
	else if (scaleFactor == 200.0)
	    scale.setSelectedIndex(5);

	renderer.setScaleFactor(scaleFactor);
	showPage();
    }

    void scale_actionPerformed(ActionEvent e) {
	setScale(new Double((String)scale.getSelectedItem()).doubleValue());
    }

    public void progress(int percentage) {
	processStatus.setText(percentage + "%");
    }

    public void progress(int percentage, String message) {
	processStatus.setText(message + " " + percentage + "%");
    }

    public void progress(String message) {
	processStatus.setText(message);
    }

    public void showPage() {
	BufferedImage pageImage = null;
	Graphics graphics = null;


	renderer.render(currentPage);
	pageImage = renderer.getLastRenderedPage();
        if (pageImage == null)
          return;
	graphics = pageImage.getGraphics();
	graphics.setColor(Color.black);
	graphics.drawRect(0, 0, pageImage.getWidth() - 1,
			  pageImage.getHeight() -1 );

	previewImageLabel.setIcon(new ImageIcon(pageImage));

	pageCount = renderer.getPageCount();

	statisticsStatus.setText(res.getString("Page") + " " +
				 (currentPage + 1) + " " +
				 res.getString("of") + " " +
				 pageCount);
    }

    public void dispose() {
      System.exit(0);
    }
}  // class PreviewDialog