WidgetBasedImageHandler.java

package es.icarto.gvsig.navtableforms.gui.images;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JTextField;

import com.jeta.forms.components.image.ImageComponent;

import es.icarto.gvsig.commons.utils.ImageUtils;
import es.icarto.gvsig.navtableforms.IValidatableForm;

public class WidgetBasedImageHandler implements ImageHandler, KeyListener,
ActionListener {

    private final String imgComp;
    private final JComponent widget;
    private final IValidatableForm form;
    private final String folderPath;
    private final ImageComponent image;

    private String extension = ".png";
    private ImageIcon emptyImage;

    public WidgetBasedImageHandler(String imgComp, String widgetName,
	    String folderPath, IValidatableForm form) {
	this.imgComp = imgComp;
	this.folderPath = folderPath.endsWith(File.separator) ? folderPath
		: folderPath + File.separator;
	this.form = form;
	this.image = (ImageComponent) form.getFormPanel().getComponentByName(
		imgComp);

	widget = this.form.getWidgets().get(widgetName);
    }

    public void setEmptyImage(String imgPath) {
	emptyImage = ImageUtils.getScaled(imgPath, new Dimension(105, 60));
    }

    public void setExtension(String ext) {
	extension = ext.startsWith(".") ? ext : "." + ext;
    }

    @Override
    public void setListeners() {
	if (widget instanceof JTextField) {
	    ((JTextField) widget).addKeyListener(this);
	} else if (widget instanceof JComboBox) {
	    ((JComboBox) widget).addActionListener(this);
	}
    }

    @Override
    /**
     * The name of the components this handler is associated on, and commonly the name of the handler itself used in maps
     */
    public String getName() {
	return imgComp;
    }

    @Override
    public void removeListeners() {
	if (widget instanceof JTextField) {
	    ((JTextField) widget).removeKeyListener(this);
	} else if (widget instanceof JComboBox) {
	    ((JComboBox) widget).removeActionListener(this);
	}
    }

    @Override
    public void fillValues() {
	String value = "";
	if (widget instanceof JTextField) {
	    value = ((JTextField) widget).getText();
	} else if (widget instanceof JComboBox) {
	    Object tmpValue = ((JComboBox) widget).getSelectedItem();
	    value = (tmpValue != null) ? tmpValue.toString() : "";
	}

	String imgPath = folderPath + value.trim() + extension;
	// System.out.println(image.getBounds());
	// ImageIcon icon = ImageUtils.getScaled(imgPath,
	// image.getBounds().getSize());
	ImageIcon icon = ImageUtils.getScaled(imgPath, new Dimension(105, 60));
	if (icon == null) {
	    icon = emptyImage;
	}
	image.setIcon(icon);
	image.repaint();

    }

    @Override
    public void fillEmptyValues() {
	fillValues();
    }

    private void delegate() {
	if (!form.isFillingValues()) {
	    form.validateForm();
	    fillValues();
	}
    }

    @Override
    public void actionPerformed(ActionEvent e) {
	delegate();
    }

    @Override
    public void keyTyped(KeyEvent e) {
    }

    @Override
    public void keyPressed(KeyEvent e) {
    }

    @Override
    public void keyReleased(KeyEvent e) {
	delegate();
    }

}