javax.swing.JFileChooser#getDialogType ( )源码实例Demo

private void updateView(JFileChooser chooser) {
  if (chooser.getApproveButtonText() != null) {
    approveButton.setText(chooser.getApproveButtonText());
    approveButton.setMnemonic(chooser.getApproveButtonMnemonic());
  } else {
    if (JFileChooser.OPEN_DIALOG == chooser.getDialogType()) {
      approveButton.setText(openButtonText);
      approveButton.setToolTipText(openButtonToolTipText);
      approveButton.setMnemonic(openButtonMnemonic);
    } else {
      approveButton.setText(saveButtonText);
      approveButton.setToolTipText(saveButtonToolTipText);
      approveButton.setMnemonic(saveButtonMnemonic);
    }
  }

  cancelButton.setText(cancelButtonText);
  cancelButton.setMnemonic(cancelButtonMnemonic);

  buttonPanel.setVisible(chooser.getControlButtonsAreShown());
}
 

private Icon getApproveButtonIcon(JFileChooser fc) {
	if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
		return FILECHOOSER_OPEN_ICON;
	}
	if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
		return FILECHOOSER_SAVE_ICON;
	}
	if (fc.getDialogType() == JFileChooser.CUSTOM_DIALOG) {
		return FILECHOOSER_SELECT_ICON;
	}
	return FILECHOOSER_SELECT_ICON;
}
 

private void doDialogTypeChanged(PropertyChangeEvent e) {
	JFileChooser chooser = getFileChooser();
	this.approveButton.setText(getApproveButtonText(chooser));
	this.approveButton.setToolTipText(getApproveButtonToolTipText(chooser));
	this.approveButton.setIcon(getApproveButtonIcon(chooser));
	if (chooser.getDialogType() == JFileChooser.SAVE_DIALOG) {
		this.lookInLabel.setText(this.saveInLabelText);
	} else {
		this.lookInLabel.setText(this.lookInLabelText);
	}
}
 

private static int showNativeFileDialog(final JFileChooser chooser) {
  final FileDialog result = new FileDialog((Frame) chooser.getParent());

  result.setDirectory(chooser.getCurrentDirectory().getPath());

  final File selected = chooser.getSelectedFile();
  result.setFile(selected == null ? "" : selected.getPath());
  result.setFilenameFilter(new FilenameFilter() {
    @Override
    public boolean accept(final File dir, final String name) {
      return chooser.getFileFilter().accept(new File(dir.getPath() + File.pathSeparator + name));
    }
  });

  if (chooser.getDialogType() == SAVE_DIALOG) {
    result.setMode(FileDialog.SAVE);
  } else {
    // The native dialog only support Open and Save
    result.setMode(FileDialog.LOAD);
  }

  if (chooser.getFileSelectionMode() == DIRECTORIES_ONLY) {
    System.setProperty("apple.awt.fileDialogForDirectories", "true");
  }

  // Display dialog
  result.setVisible(true);

  System.setProperty("apple.awt.fileDialogForDirectories", "false");
  if (result.getFile() == null) {
    return CANCEL_OPTION;
  }

  final String selectedDir = result.getDirectory();
  chooser
      .setSelectedFile(new File(FileUtils.ensureTrailingSlash(selectedDir) + result.getFile()));
  return APPROVE_OPTION;
}