在Jface中有设置MessageDialog位置的选项吗？

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;

public class CustomMessageDialog extends Dialog {

    public CustomMessageDialog(Shell parentShell) {
        super(parentShell);
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite container = (Composite) super.createDialogArea(parent);
        GridLayout layout = new GridLayout(1, false);
        container.setLayout(layout);

        // 创建自定义的对话框内容
        // ...

        return container;
    }

    @Override
    protected void createButtonsForButtonBar(Composite parent) {
        // 创建自定义的按钮
        // ...
    }

    @Override
    protected Point getInitialSize() {
        return new Point(450, 300); // 设置对话框的初始大小
    }

    @Override
    protected void configureShell(Shell newShell) {
        super.configureShell(newShell);
        newShell.setText("Custom Message Dialog"); // 设置对话框标题
    }
}

CustomMessageDialog dialog = new CustomMessageDialog(shell);
dialog.open();