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| package oracle.forms.fd;
import javax.swing.*;
import java.beans.*;
import java.awt.*;
import java.io.File;
import java.util.Hashtable;
import java.util.Enumeration;
import javax.swing.filechooser.*;
/**
* A javabean to display an Open-dialog bow with image preview
*
* @version 1.0
* @date 20-oct-2005
* @author Francois Degrelle
*/
public class GetImageFileName extends Component
{
public String string = "" ;
public GetImageFileName()
{
super();
}
/**
* method to display the OpenFile dialog.
*
* @param the title for the dialog
* @param the starting directory
* @return the selected file name (or null)
*/
public String GetFile(String dialogTitle, String startDirectory)
{
String sFileName = "" ;
Filters.setTitle( dialogTitle ) ;
Filters.setDir( startDirectory ) ;
sFileName = Filters.Start() ;
return sFileName ;
}
public void setString(String s)
{
string = s ;
System.out.println("s="+string);
}
public String getString()
{
return string ;
}
public void SetLAF(String s)
{
if(s.equalsIgnoreCase("SYSTEM"))
{
try
{
//System.out.println(UIManager.getLookAndFeelDefaults());
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
else
{
try
{
//System.out.println(UIManager.getLookAndFeelDefaults());
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
}
/**
* class that handle the JFileChooser
*/
class Filters extends JLabel implements PropertyChangeListener {
private static final int ICON_WIDTH = 150;
private static final int ICON_HEIGHT = 150;
private static String fileName = "" ;
private static String sTitle = "" ;
private static String startDir = "." ;
private static String sFilters = "" ;
// Set the dialog box title
public static void setTitle( String title )
{
sTitle = title ;
//System.out.println("**** sTitle="+sTitle);
}
// Set the start directory
public static void setDir( String directory )
{
startDir = directory ;
//System.out.println("**** startdir="+startDir);
}
// Add the image previewer to the dialog box
public Filters(JFileChooser chooser) {
setVerticalAlignment(JLabel.CENTER);
setHorizontalAlignment(JLabel.CENTER);
chooser.addPropertyChangeListener(this);
setPreferredSize(new Dimension (ICON_WIDTH, ICON_HEIGHT));
}
public void propertyChange(
PropertyChangeEvent changeEvent) {
String changeName = changeEvent.getPropertyName();
if (changeName.equals
(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
File file = (File)changeEvent.getNewValue();
if (file != null) {
ImageIcon icon = new ImageIcon(file.getPath());
if (icon.getIconWidth() > ICON_WIDTH) {
icon = new ImageIcon(
icon.getImage().getScaledInstance(ICON_WIDTH, -1, Image.SCALE_DEFAULT));
if (icon.getIconHeight() > ICON_HEIGHT) {
icon = new ImageIcon(
icon.getImage().getScaledInstance(-1, ICON_HEIGHT, Image.SCALE_DEFAULT));
}
}
setIcon(icon);
}
}
}
public static String Start() {
fileName = "" ;
JFileChooser fileChooser = new JFileChooser(startDir);
LabelAccessory accessory = new LabelAccessory(fileChooser);
fileChooser.setDialogTitle(sTitle);
fileChooser.setLocation(50,50);
fileChooser.setPreferredSize(new Dimension(600,400));
// Set the filter
ExampleFileFilter filter = new ExampleFileFilter("jpg");
filter.addExtension("jpeg");
filter.addExtension("gif");
filter.addExtension("png");
filter.setDescription("Jpg,Jpeg,Gif & Png Files");
fileChooser.addChoosableFileFilter(filter);
fileChooser.setAccessory(accessory);
fileChooser.addPropertyChangeListener
(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY, accessory);
int status = fileChooser.showOpenDialog(null);
fileName = "" ;
if (status == JFileChooser.APPROVE_OPTION) {
File selectedFile = fileChooser.getSelectedFile();
fileName = selectedFile.getParent() + selectedFile.separator + selectedFile.getName() ;
}
return fileName ;
}
public static class LabelAccessory extends JLabel implements PropertyChangeListener {
private static final int ICON_WIDTH = 150;
private static final int ICON_HEIGHT = 150;
public LabelAccessory(JFileChooser chooser) {
setVerticalAlignment(JLabel.CENTER);
setHorizontalAlignment(JLabel.CENTER);
chooser.addPropertyChangeListener(this);
setPreferredSize(new Dimension(ICON_WIDTH, ICON_HEIGHT));
}
public void propertyChange(
PropertyChangeEvent changeEvent) {
String changeName = changeEvent.getPropertyName();
if (changeName.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
File file = (File)changeEvent.getNewValue();
if (file != null) {
ImageIcon icon = new ImageIcon(file.getPath());
if (icon.getIconWidth() > ICON_WIDTH) {
icon = new ImageIcon(icon.getImage().getScaledInstance(ICON_WIDTH, -1, Image.SCALE_DEFAULT));
if (icon.getIconHeight() > ICON_HEIGHT) {
icon = new ImageIcon(icon.getImage().getScaledInstance(-1, ICON_HEIGHT, Image.SCALE_DEFAULT));
}
}
setIcon(icon);
}
}
}
}
/**
* A convenience implementation of FileFilter that filters out
* all files except for those type extensions that it knows about.
*
* Extensions are of the type ".foo", which is typically found on
* Windows and Unix boxes, but not on Macinthosh. Case is ignored.
*
* Example - create a new filter that filerts out all files
* but gif and jpg image files:
*
* JFileChooser chooser = new JFileChooser();
* ExampleFileFilter filter = new ExampleFileFilter(
* new String{"gif", "jpg"}, "JPEG & GIF Images")
* chooser.addChoosableFileFilter(filter);
* chooser.showOpenDialog(this);
*
* @version 1.9 04/23/99
* @author Jeff Dinkins
*/
public static class ExampleFileFilter extends FileFilter {
private String TYPE_UNKNOWN = "Type Unknown";
private String HIDDEN_FILE = "Hidden File";
private Hashtable filters = null;
private String description = null;
private String fullDescription = null;
private boolean useExtensionsInDescription = true;
/**
* Creates a file filter. If no filters are added, then all
* files are accepted.
*
* @see #addExtension
*/
public ExampleFileFilter() {
this.filters = new Hashtable();
}
/**
* Creates a file filter that accepts files with the given extension.
* Example: new ExampleFileFilter("jpg");
*
* @see #addExtension
*/
public ExampleFileFilter(String extension) {
this(extension,null);
}
/**
* Creates a file filter that accepts the given file type.
* Example: new ExampleFileFilter("jpg", "JPEG Image Images");
*
* Note that the "." before the extension is not needed. If
* provided, it will be ignored.
*
* @see #addExtension
*/
public ExampleFileFilter(String extension, String description) {
this();
if(extension!=null) addExtension(extension);
if(description!=null) setDescription(description);
}
/**
* Creates a file filter from the given string array.
* Example: new ExampleFileFilter(String {"gif", "jpg"});
*
* Note that the "." before the extension is not needed adn
* will be ignored.
*
* @see #addExtension
*/
public ExampleFileFilter(String[] filters) {
this(filters, null);
}
/**
* Creates a file filter from the given string array and description.
* Example: new ExampleFileFilter(String {"gif", "jpg"}, "Gif and JPG Images");
*
* Note that the "." before the extension is not needed and will be ignored.
*
* @see #addExtension
*/
public ExampleFileFilter(String[] filters, String description) {
this();
for (int i = 0; i < filters.length; i++) {
// add filters one by one
addExtension(filters[i]);
}
if(description!=null) setDescription(description);
}
/**
* Return true if this file should be shown in the directory pane,
* false if it shouldn't.
*
* Files that begin with "." are ignored.
*
* @see #getExtension
* @see FileFilter#accepts
*/
public boolean accept(File f) {
if(f != null) {
if(f.isDirectory()) {
return true;
}
String extension = getExtension(f);
if(extension != null && filters.get(getExtension(f)) != null) {
return true;
};
}
return false;
}
/**
* Return the extension portion of the file's name .
*
* @see #getExtension
* @see FileFilter#accept
*/
public String getExtension(File f) {
if(f != null) {
String filename = f.getName();
int i = filename.lastIndexOf('.');
if(i>0 && i<filename.length()-1) {
return filename.substring(i+1).toLowerCase();
};
}
return null;
}
/**
* Adds a filetype "dot" extension to filter against.
*
* For example: the following code will create a filter that filters
* out all files except those that end in ".jpg" and ".tif":
*
* ExampleFileFilter filter = new ExampleFileFilter();
* filter.addExtension("jpg");
* filter.addExtension("tif");
*
* Note that the "." before the extension is not needed and will be ignored.
*/
public void addExtension(String extension) {
if(filters == null) {
filters = new Hashtable(5);
}
filters.put(extension.toLowerCase(), this);
fullDescription = null;
}
/**
* Returns the human readable description of this filter. For
* example: "JPEG and GIF Image Files (*.jpg, *.gif)"
*
* @see setDescription
* @see setExtensionListInDescription
* @see isExtensionListInDescription
* @see FileFilter#getDescription
*/
public String getDescription() {
if(fullDescription == null) {
if(description == null || isExtensionListInDescription()) {
fullDescription = description==null ? "(" : description + " (";
// build the description from the extension list
Enumeration extensions = filters.keys();
if(extensions != null) {
fullDescription += "." + (String) extensions.nextElement();
while (extensions.hasMoreElements()) {
fullDescription += ", " + (String) extensions.nextElement();
}
}
fullDescription += ")";
} else {
fullDescription = description;
}
}
return fullDescription;
}
/**
* Sets the human readable description of this filter. For
* example: filter.setDescription("Gif and JPG Images");
*
* @see setDescription
* @see setExtensionListInDescription
* @see isExtensionListInDescription
*/
public void setDescription(String description) {
this.description = description;
fullDescription = null;
}
/**
* Determines whether the extension list (.jpg, .gif, etc) should
* show up in the human readable description.
*
* Only relevent if a description was provided in the constructor
* or using setDescription();
*
* @see getDescription
* @see setDescription
* @see isExtensionListInDescription
*/
public void setExtensionListInDescription(boolean b) {
useExtensionsInDescription = b;
fullDescription = null;
}
/**
* Returns whether the extension list (.jpg, .gif, etc) should
* show up in the human readable description.
*
* Only relevent if a description was provided in the constructor
* or using setDescription();
*
* @see getDescription
* @see setDescription
* @see setExtensionListInDescription
*/
public boolean isExtensionListInDescription() {
return useExtensionsInDescription;
}
}
} |
