gvSIG projects pool

package org.gvsig.simpleimageviewer.app.mainplugin;

import java.awt.BorderLayout;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.geom.AffineTransform;

import java.awt.image.AffineTransformOp;

import java.awt.image.BufferedImage;

import java.awt.image.BufferedImageOp;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import java.io.File;

import java.io.IOException;

import java.net.URL;

import java.text.NumberFormat;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

import javax.swing.SwingUtilities;

import org.apache.commons.io.FilenameUtils;

import org.gvsig.imageviewer.ImageViewer;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.i18n.I18nManager;

import org.gvsig.tools.swing.api.ToolsSwingLocator;

import org.gvsig.tools.swing.api.ToolsSwingManager;

import org.gvsig.tools.swing.icontheme.IconTheme;

import org.gvsig.tools.swing.icontheme.IconThemeManager;

import org.jdesktop.swingx.JXImageView;

public class ImageViewerControler extends ImageViewerView implements ImageViewer {

    private static final int ROTATE_RIGHT = 0;

    private static final int ROTATE_LEFT = 1;

    private JXImageView imageView;

    public ImageViewerControler() {

        this.initComponents();

    }

    private void initComponents() {

        ToolsSwingManager toolsSwingManager = ToolsSwingLocator.getToolsSwingManager();

        this.imageView = new JXImageView();

        this.ImageContainer.setLayout(new BorderLayout());

        this.ImageContainer.add(this.imageView,BorderLayout.CENTER);

        toolsSwingManager.translate(this.btnZoomIn);

        toolsSwingManager.translate(this.btnZoomOut);

        toolsSwingManager.translate(this.btnRotateLeft);

        toolsSwingManager.translate(this.btnRotateRight);

        toolsSwingManager.translate(this.btnFit);

        toolsSwingManager.translate(this.btnZoom1_1);

        this.btnRotateLeft.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                rotate(ROTATE_LEFT);

            }

        });

        this.btnRotateRight.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                rotate(ROTATE_RIGHT);

            }

        });

        this.btnFit.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                adjustScale();

            }

        });

        this.btnZoom1_1.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                imageView.setScale(1.0);

            }

        });

        this.btnZoomIn.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                imageView.setScale(imageView.getScale()*2);

            }

        });

        this.btnZoomOut.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                imageView.setScale(imageView.getScale()*0.5);

            }

        });

        this.imageView.addPropertyChangeListener("scale", new PropertyChangeListener() {

            @Override

            public void propertyChange(PropertyChangeEvent evt) {

                onChangeScale();

            }

        });

    }

    @Override

    public ImageIcon loadImage(String imageName) {

        String iconName = FilenameUtils.getBaseName(imageName);

        IconThemeManager iconThemeManager = ToolsSwingLocator.getIconThemeManager();

        IconTheme theme = iconThemeManager.getCurrent();

        if( theme.exists(iconName) ) {

            return theme.get(iconName);

        }

        return super.loadImage(imageName); 

    }

    private void rotate(int mode) {

        double scale = imageView.getScale();

        Image img = imageView.getImage();

        BufferedImage src = new BufferedImage(

                    img.getWidth(null),

                    img.getHeight(null), 

                    BufferedImage.TYPE_INT_ARGB);

        BufferedImage dst = new BufferedImage(

                    img.getHeight(null), 

                    img.getWidth(null),

                    BufferedImage.TYPE_INT_ARGB);

        Graphics2D g = (Graphics2D)src.getGraphics();

        try {

            // smooth scaling

            g.drawImage(img, 0, 0, null);

        } finally {

            g.dispose();

        }

        AffineTransform trans;

        switch(mode) {

        case ROTATE_RIGHT:

            trans = AffineTransform.getRotateInstance(Math.PI/2,0,0);

            trans.translate(0,-src.getHeight());

            break;

        default:

        case ROTATE_LEFT:

            trans = AffineTransform.getRotateInstance(-Math.PI/2,0,0);

            trans.translate(-src.getWidth(),0);

            break;

        }

        BufferedImageOp op = new AffineTransformOp(trans, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);

        op.filter(src,dst);

        imageView.setImage(dst);            

        imageView.setScale(scale);

    }

    private void onChangeScale() {

        I18nManager i18n = ToolsLocator.getI18nManager();

        NumberFormat nf = NumberFormat.getNumberInstance();

        nf.setMaximumFractionDigits(3);

        nf.setMinimumFractionDigits(3);

        String scale = nf.format(this.imageView.getScale());

        this.lblMessages.setText(i18n.getTranslation("_Scale_{0}", new String[] {scale}));

    }

    private void adjustScale() {

        try {

            double sx;

            double sy;

            sx = (double)this.getWidth() / this.imageView.getImage().getWidth(null);

            sy = (double)this.getHeight() / this.imageView.getImage().getHeight(null);

            if( sx > sy ) {

                this.imageView.setScale(sy);

            } else {

                this.imageView.setScale(sx);

            }

        } catch(Exception ex) {

            // Ignore exception, don't crash

        }

    }

    @Override

    public void clean() {

        this.imageView.setImage((Image)null);

    }

    @Override

    public void setImage(final Image image) {

        imageView.setImage(image);

        onChangeScale();

        adjustScale();

        SwingUtilities.invokeLater(new Runnable() {

            @Override

            public void run() {

                adjustScale();

            }

        });

    }

    @Override

    public void setImage(URL url) {

        try {

            this.imageView.setImage(url);

        } catch (IOException ex) {

            throw new IllegalArgumentException(ex);

        }

        onChangeScale();

        SwingUtilities.invokeLater(new Runnable() {

            @Override

            public void run() {

                adjustScale();

            }

        });

    }

    @Override

    public void setImage(File file) {

        try {

            this.imageView.setImage(file);

        } catch (IOException ex) {

            throw new IllegalArgumentException(ex);

        }

        onChangeScale();

        SwingUtilities.invokeLater(new Runnable() {

            @Override

            public void run() {

                adjustScale();

            }

        });

    }

    @Override

    public JComponent asJComponent() {

        return this;

    }

}