ergodialog.java

ErGo是一个很早的Java通用围棋服务器(IGS/NNGS)客户端程序。有全部源码和文档

package ergo.ui;

// $Id: ErgoDialog.java,v 1.2 1999/08/13 01:20:07 sigue Exp $

/*
 *  Copyright (C) 1999  Carl L. Gay and Antranig M. Basman.
 *  See the file copyright.txt, distributed with this software,
 *  for further information.
 */

import java.awt.*;
import java.awt.event.*;

/*
 * To do:
 * - Really need to come up with a coherent interface and class structure
 *   for all these dialogs...
 */

/**
 * Handles the WINDOW_DESTROY event and provides default methods.
 * All other dialogs in Ergo should use this as a superclass.
 */
public class ErgoDialog extends Dialog implements FocusListener {
  private boolean disposeOnExit = true;

  ErgoDialog (Frame f, String title, boolean modal, boolean disposep) {
    super(f, title, modal);

    disposeOnExit = disposep;
    // Deal with the user clicking the dialog's close box.
    addWindowListener(new WindowAdapter() {
      public void windowClosing (WindowEvent e) { close(); }});

  }

  ErgoDialog (Frame f, String title, boolean modal) {
    this(f, title, modal, true);
  }

  public void focusGained (FocusEvent e) {
    if (e.getComponent() instanceof TextField) {
      TextField field = (TextField) e.getComponent();
      if (field.isEditable())
	field.selectAll();
    }
  }

  public void focusLost (FocusEvent e) {
    if (e.getComponent() instanceof TextField) {
      TextField field = (TextField) e.getComponent();
      if (field.isEditable())
	field.select(0, 0);
    }
  }

  private void addTextFieldListeners (Component[] comps) {
    if (comps != null) {
      // Add this dialog as a FocusListener for each TextField it contains
      // so that we can highlight the text when it gains focus.
      for (int i = 0; i < comps.length; i++)
	if (comps[i] instanceof TextField) {
	  TextField field = (TextField) comps[i];
	  if (field.isEditable())
	    field.addFocusListener(this);
	}
	else if (comps[i] instanceof Container) {
	  addTextFieldListeners(((Container) comps[i]).getComponents());
	}
    }
  }

  public Component getInitialFocus () {	// default method
    return null;
  }

  public void open () {
    pack();
    addTextFieldListeners(getComponents());

    Rectangle pr = getParent().getBounds();
    Dimension ss = Toolkit.getDefaultToolkit().getScreenSize();
    int w = getSize().width;
    int h = getSize().height;
    int x = Math.min(ss.width - w, Math.max(0, pr.x + (pr.width - w) / 2));
    int y = Math.min(ss.height - h, Math.max(0, pr.y + (pr.height - h) / 2));
    setBounds(x, y, getSize().width, getSize().height);

    //setVisible(true);
    show();  // show() for dialogs. setVisible() for Components. go figure.
    Component comp = getInitialFocus();
    if (comp != null)
      comp.requestFocus();
  }

  public void close () {
    if (disposeOnExit)
      dispose();
    else
      setVisible(false);
    //getParent().enable();
  }
}