A facade for the save FileDialog
//Send questions, comments, bug reports, etc. to the authors:
//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)
import java.io.File;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
/**
* This class provides a facade for the "save" FileDialog class. If the selected
* file already exists, the user is asked to confirm before overwriting.
*/
public class SafeSaveDialog {
// The wrapped FileDialog
private FileDialog dlg;
/**
* SafeSaveDialog constructor
*
* @param shell the parent shell
*/
public SafeSaveDialog(Shell shell) {
dlg = new FileDialog(shell, SWT.SAVE);
}
public String open() {
// We store the selected file name in fileName
String fileName = null;
// The user has finished when one of the
// following happens:
// 1) The user dismisses the dialog by pressing Cancel
// 2) The selected file name does not exist
// 3) The user agrees to overwrite existing file
boolean done = false;
while (!done) {
// Open the File Dialog
fileName = dlg.open();
if (fileName == null) {
// User has cancelled, so quit and return
done = true;
} else {
// User has selected a file; see if it already exists
File file = new File(fileName);
if (file.exists()) {
// The file already exists; asks for confirmation
MessageBox mb = new MessageBox(dlg.getParent(), SWT.ICON_WARNING
| SWT.YES | SWT.NO);
// We really should read this string from a
// resource bundle
mb.setMessage(fileName + " already exists. Do you want to replace it?");
// If they click Yes, we're done and we drop out. If
// they click No, we redisplay the File Dialog
done = mb.open() == SWT.YES;
} else {
// File does not exist, so drop out
done = true;
}
}
}
return fileName;
}
public String getFileName() {
return dlg.getFileName();
}
public String[] getFileNames() {
return dlg.getFileNames();
}
public String[] getFilterExtensions() {
return dlg.getFilterExtensions();
}
public String[] getFilterNames() {
return dlg.getFilterNames();
}
public String getFilterPath() {
return dlg.getFilterPath();
}
public void setFileName(String string) {
dlg.setFileName(string);
}
public void setFilterExtensions(String[] extensions) {
dlg.setFilterExtensions(extensions);
}
public void setFilterNames(String[] names) {
dlg.setFilterNames(names);
}
public void setFilterPath(String string) {
dlg.setFilterPath(string);
}
public Shell getParent() {
return dlg.getParent();
}
public int getStyle() {
return dlg.getStyle();
}
public String getText() {
return dlg.getText();
}
public void setText(String string) {
dlg.setText(string);
}
}
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