messagebox.java

自己编制的othello程序

//********************************************************************
//
// MessageBox.java
//
//            MessageBox类 ,通用的MessageBox模式对话框
//
//*********************************************************************

import java.awt.*;

//使用静态函数 createMessageBox(...)弹出一个模式对话框
//createMessageBox()参数：
// String msg ，需要显示的消息
// String title = "" ， 对话框的标题，缺省为空串
// int type = 0 ，类型，0 只有OK按钮，１有OK,Cancel两个按钮，缺省为0

public class MessageBox extends Dialog
{
    protected Button okButton;
    protected Button cancelButton;
    protected static boolean back;
    protected static Frame createdFrame;

    public MessageBox(Frame parent,String message,String title ,int type)
    {
        super(parent,true);

        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints constraints = new GridBagConstraints();

        okButton = new Button("OK");
        cancelButton = new Button("Cancel");

        Label messagelabel = new Label(message);
        setLayout(gridbag);
        this.setResizable(false);
        add(messagelabel);

        pack();

        setLayout(null);
        int x = this.getSize().width;
        int y = this.getSize().height;

        switch(type)
        {
          case 1:
          {
                if (x<210) x = 210;
                y+=20;
                int bx = x/2 -80;

                messagelabel.setBounds(20,20,x,y-20);

                this.setBounds(200,200,x+20,y+70);
                okButton.setBounds(bx,y+10,75,25);
                cancelButton.setBounds(bx+80,y+10,75,25);
                add(okButton);
                add(cancelButton);
                back = false;
                this.setTitle(title);
                break;
          }
          case 0:
          {
                if (x<120) x = 120;
                y+=10;
                int bx = x/2 -30;

                this.setBounds(200,200,x,y+70);
                okButton.setBounds(bx,y+10,75,25);
                add(okButton);
                back = false;
                this.setTitle(title);

                break;
          }
        }
    }

    public boolean action (Event evt,Object obj)
    {
        if (evt.target == okButton )
        {
        //  hide();
            back = true;
            
            dispose();
            if(createdFrame != null)
            {
                createdFrame.setVisible(false);
            }
        }
        else
        if (evt.target == cancelButton )
        {
            back = false;
            dispose();
            if(createdFrame != null)
            {
                createdFrame.setVisible(false);
            }
        }

        return super.action(evt,obj);
    }

    public boolean handelEvent(Event e)
    {
        if (e.id == Event.WINDOW_DESTROY )
        {
            back = false;
            dispose();
        }
        return super.handleEvent(e);
    }

    public static boolean createMessageBox(String msg)
    {
        return createMessageBox(msg,"",0);
    }

    public static boolean createMessageBox(String msg,String title)
    {
        return createMessageBox(msg,title,0);
    }

    public static boolean createMessageBox(String msg,String title,int type)
    {
        if (createdFrame == null )
        {
            createdFrame = new Frame("Dialog");
        }

        MessageBox msgbox = new MessageBox(createdFrame,msg,title ,type);
        createdFrame.setSize(msgbox.getSize().width ,msgbox.getSize().height);
        msgbox.show();
        if(back) return true;
        else return false;
    }
}