Java Tutorial/SWT/FileDialog

17. Displaying the Open or Save File Dialog

FileDialog Constants

ConstantDescriptionSWT.OPENCreates a dialog for opening a single file. This is the default.SWT.MULTICreates a dialog for opening multiple files.SWT.SAVECreates a dialog for saving a file.

17. File Save Dialog: filter name, filter extensions, filter path and file name

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileSaveDialogFilterNameFilterExtensions {

 public static void main(String[] args) {
   Display display = new Display();
   Shell shell = new Shell(display);
   FileDialog dialog = new FileDialog(shell, SWT.SAVE);
   dialog.setFilterNames(new String[] { "Batch Files", "All Files (*.*)" });
   dialog.setFilterExtensions(new String[] { "*.bat", "*.*" }); // Windows
                                                                 // wild cards
   dialog.setFilterPath("c:\\"); // Windows path
   dialog.setFileName("yourFile.bat");
   System.out.println("Save to: " + dialog.open());
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>

17. Getting the Selected File or Files

   <source lang="java">

import java.io.File; import java.util.ArrayList; import java.util.Collection; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileDialogMultipleFileNameSelection {

 public static void main(String[] args) {
   Display display = new Display();
   final Shell shell = new Shell(display);
   FileDialog dlg = new FileDialog(shell, SWT.MULTI);
   Collection files = new ArrayList();
   if (dlg.open() != null) {
     String[] names = dlg.getFileNames();
     for (int i = 0, n = names.length; i < n; i++) {
       StringBuffer buf = new StringBuffer(dlg.getFilterPath());
       if (buf.charAt(buf.length() - 1) != File.separatorChar)
         buf.append(File.separatorChar);
       buf.append(names[i]);
       files.add(buf.toString());
     }
   }
   System.out.println(files);
   display.dispose();
 }

}</source>

17. Open an Open FileDialog

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileDialogOpenSelectedName {

 public static void main(String[] args) {
   Display display = new Display();
   final Shell shell = new Shell(display);

   FileDialog dlg = new FileDialog(shell, SWT.OPEN);
   String fileName = dlg.open();
   if (fileName != null) {
     System.out.println(fileName);
   }

   display.dispose();
 }

}</source>

17. Set FilterExtensions for FileDialog

   <source lang="java">

import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileDialogFilterExtensions {

 public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   
   
   FileDialog dialog = new FileDialog(shell);
   dialog.setFilterExtensions(new String[] { "*.ico", "*.gif", "*.*" });
   String name = dialog.open();
   
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}</source>

17. Specifying File Types and Extensions

   <source lang="java">

setFilterNames(String[] names); setFilterExtensions(String[] extensions);</source>

17. Specifying the Starting Directory and File Name

FileDialog"s setFilterPath() method allows you to specify the initial directory for the dialog.

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileDialogStartingDirectoryFileName {

 public static void main(String[] args) {
   Display display = new Display();
   final Shell shell = new Shell(display);
   FileDialog dlg = new FileDialog(shell, SWT.OPEN);
   dlg.setFilterPath("C:/");
   String fileName = dlg.open();
   if (fileName != null) {
     System.out.println(fileName);
   }
   display.dispose();
 }

}</source>

17. Suggest a file name to use for saving a file by prefilling the entry field in the Save dialog box

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; public class FileDialogSaveDefaultFileName {

 public static void main(String[] args) {
   Display display = new Display();
   final Shell shell = new Shell(display);
   FileDialog dlg = new FileDialog(shell, SWT.SAVE);
   dlg.setFileName("defaultName");
   String fileName = dlg.open();
   if (fileName != null) {
     System.out.println(fileName);
   }
   display.dispose();
 }

}</source>