Java Swing - PUmlViewerMulti

 Java Swing - PUmlViewerMulti

package jlib5.app;

import jlib5.swing.Dock;
import jlib5.swing.Drop;
import jlib5.swing.ImageView;
import com.formdev.flatlaf.FlatLightLaf;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.List;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import jlib5.java.FileApi;
import jlib5.java.PUmlApi;
import jlib5.swing.Swing;
import jlib5.swing.TextView;
import net.infonode.docking.View;

public final class PUmlViewerMulti {
    
    Dock dock;
    javax.swing.JFrame frame;
    ImageView imageView;
    TextView textView;
    List<BufferedImage> images;
    int imageIndex = 0;
    JLabel statusText;
    
    public static void main(String[] args) throws Exception {
        FlatLightLaf.setup();
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new PUmlViewerMulti();
            }
        });
    }
    
    PUmlViewerMulti() {
        createViews();
        showFrame();
    }
    
    final void createViews() {
        boolean useToolbar = true;
        textView = new TextView();
        imageView = new ImageView();
        JPanel vbox = Swing.getVbox();
        if( useToolbar ) {
            JToolBar toolBar = new JToolBar();
            toolBar.add(Swing.getButton("<",null, this::prevImage ) );
            toolBar.add(Swing.getButton(">",null, this::nextImage ) );
            toolBar.add(Swing.getButton("(0)",null,() -> { imageView.updateImage("original"); } ) );
            toolBar.add(Swing.getButton("(+)",null,() -> { imageView.updateImage("increase"); } ) );
            toolBar.add(Swing.getButton("(-)",null,() -> { imageView.updateImage("decrease"); } ) );
            toolBar.add(Swing.getButton("(F)",null,() -> { imageView.updateImage("fit"); } ) );
            toolBar.add(Swing.getButton("(W)",null,() -> { imageView.updateImage("width"); } ) );
            toolBar.add(Swing.getButton("(H)",null,() -> { imageView.updateImage("height"); } ) ); 
            toolBar.setAlignmentX(Component.LEFT_ALIGNMENT);
            vbox.add(toolBar);
        } else {
            JPanel hbox = Swing.getHbox(Swing.getButton("<",null, this::prevImage ),
                Swing.getButton(">",null, this::nextImage ),
                Swing.getButton("(0)",null,() -> { imageView.updateImage("original"); } ),
                Swing.getButton("(+)",null,() -> { imageView.updateImage("increase"); } ),
                Swing.getButton("(-)",null,() -> { imageView.updateImage("decrease"); } ),
                Swing.getButton("(F)",null,() -> { imageView.updateImage("fit"); } ),
                Swing.getButton("(W)",null,() -> { imageView.updateImage("width"); } ),
                Swing.getButton("(H)",null,() -> { imageView.updateImage("height"); } ));
            vbox.add(hbox);
        }
        vbox.add( imageView.getLayout() );
        textView.getCtrl().setTransferHandler(new Drop(this::fileDropHandler) );

        dock = new Dock();
        View txtView = dock.addToViewMap("Script", null, textView.getLayout());
        View imgView = dock.addToViewMap("Image", null, vbox );
        
        dock.createRootWindow();
        dock.getRootWindow().setWindow(dock.getHSplit(0.4f, txtView, imgView));
    }
    
    void showFrame() {
        frame = new JFrame("PlantUml Viewer");
        frame.getContentPane().add(createToolBar(), BorderLayout.NORTH);
        frame.getContentPane().add(dock.getRootWindow(), BorderLayout.CENTER);
        frame.getContentPane().add(statusText = new JLabel("Ready"), BorderLayout.SOUTH);
        frame.setJMenuBar(createMenuBar());
        frame.setSize(900, 700);
        frame.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);  
    }    

   //---------------------------------------------------------------------------
    public File fileOpenDialog(Frame frame) {
        JFileChooser fileChooser = new JFileChooser();
        fileChooser.setCurrentDirectory(new File(System.getProperty("user.home")));
        int result = fileChooser.showOpenDialog(frame);
        if (result == JFileChooser.APPROVE_OPTION) {
            return fileChooser.getSelectedFile();
        }
        return null;
    }

    JToolBar createToolBar() {
        JToolBar toolBar = new JToolBar();
        toolBar.add(Swing.getButton("Render",null,this::render) );
        return toolBar;
    }    
    
    JMenuBar createMenuBar() {
      JMenuBar menu = new JMenuBar();
      menu.add(createFileMenu());
      return menu;
    }

    JMenu createFileMenu() {
        JMenu menu = new JMenu("File");
        JMenuItem item = new JMenuItem("Exit");
        menu.add(item).addActionListener((ActionEvent e) -> {
            System.exit(0);
        });
        return menu;
    }
    
   //---------------------------------------------------------------------------
    boolean fileDropHandler(Object...obj)  {
        java.util.List<File> files = (java.util.List<File>) obj[0];
        try {
            textView.getCtrl().setText(FileApi.fileToString(files.get(0).getAbsolutePath()));
        } catch (IOException ignore) {
        }
        return true;
    }
    void fileOpen() {
        imageView.loadImage(fileOpenDialog(frame));
    } 
    void render() {
        try {
            images = PUmlApi.makeImage( textView.getCtrl().getText() );
            if( images != null ) {
                imageIndex = 0;
                imageView.setImage(images.get(imageIndex));    
                statusText.setText( "" + (imageIndex+1) + " / " + images.size());
            }
        } catch (IOException ignore) {
        } catch (InterruptedException ignore) {
        }
    }
    void prevImage() {
        if( images != null && imageIndex > 0 ) {
            imageIndex -= 1;
            imageView.setImage(images.get(imageIndex));  
            statusText.setText( "" + (imageIndex+1) + " / " + images.size());
        }
    }
    void nextImage() {
        if( images != null && imageIndex < images.size() - 1 ) {
            imageIndex += 1;
            imageView.setImage(images.get(imageIndex));  
            statusText.setText( "" + (imageIndex+1) + " / " + images.size());
        }
    }
}