SWT Button 事件例子

1、新建三个文件：

   testForm001.java ：窗体类

   testEvent001.java ：事件处理类

   testBS001.java ：业务处理类

 

2、该三个文件的内容分别为：

   testForm001.java

  

package com.wy;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.grouplayout.GroupLayout;
import org.eclipse.swt.layout.grouplayout.LayoutStyle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class testForm001 {

    private Text txtName;
    private Button btnMyPress;
    protected Shell shell;

    /**
     * Launch the application
     * @param args
     */
    public static void main(String[] args) {
        try {
            testForm001 window = new testForm001();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Open the window
     */
    public void open() {
        final Display display = Display.getDefault();
        createContents();
        
        new testEvent001(this);
        
        shell.open();
        shell.layout();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }

    public Text gettxtName()
    {
        return txtName;
    }
    
    public Button getbtnMyPress()
    {
        return  btnMyPress;
    }
    
    /**
     * Create contents of the window
     */
    protected void createContents() {
        shell = new Shell();
        shell.setText("SWT Application");

        btnMyPress = new Button(shell, SWT.NONE);
        btnMyPress.setData("newKey", null);
        btnMyPress.setText("buttonbtnMyPressvalue");
        
    

        Label lblMsg;
        lblMsg = new Label(shell, SWT.NONE);
        lblMsg.setText("Labelvalue");

        txtName = new Text(shell, SWT.BORDER);
        txtName.setRedraw(true);
        final GroupLayout groupLayout = new GroupLayout(shell);
        groupLayout.setHorizontalGroup(
            groupLayout.createParallelGroup(GroupLayout.LEADING)
                .add(groupLayout.createSequentialGroup()
                    .add(groupLayout.createParallelGroup(GroupLayout.LEADING)
                        .add(groupLayout.createSequentialGroup()
                            .add(35, 35, 35)
                            .add(lblMsg, GroupLayout.PREFERRED_SIZE, 111, GroupLayout.PREFERRED_SIZE))
                        .add(groupLayout.createSequentialGroup()
                            .add(78, 78, 78)
                            .add(btnMyPress, GroupLayout.PREFERRED_SIZE, 151, GroupLayout.PREFERRED_SIZE))
                        .add(groupLayout.createSequentialGroup()
                            .add(3, 3, 3)
                            .add(txtName, GroupLayout.PREFERRED_SIZE, 217, GroupLayout.PREFERRED_SIZE)))
                    .addContainerGap(263, Short.MAX_VALUE))
        );
        groupLayout.setVerticalGroup(
            groupLayout.createParallelGroup(GroupLayout.LEADING)
                .add(groupLayout.createSequentialGroup()
                    .add(45, 45, 45)
                    .add(lblMsg, GroupLayout.PREFERRED_SIZE, 44, GroupLayout.PREFERRED_SIZE)
                    .add(29, 29, 29)
                    .add(btnMyPress, GroupLayout.PREFERRED_SIZE, 61, GroupLayout.PREFERRED_SIZE)
                    .add(27, 27, 27)
                    .add(txtName, GroupLayout.PREFERRED_SIZE, 80, GroupLayout.PREFERRED_SIZE)
                    .add(55, 55, 55))
        );
        shell.setLayout(groupLayout);
        shell.pack();
        //
    }
 
}

 

 

    testEvent001.java

   

package com.wy;

import org.eclipse.swt.widgets.*;
import org.eclipse.swt.events.*;

public class testEvent001 {
    
    private testBS001 testBS=null;
    private Text txtName=null;
    private Button btnMyPress=null;
    
    public testEvent001(testForm001 frm)
    {
        txtName=frm.gettxtName();
        btnMyPress=frm.getbtnMyPress();
        
        testBS=new testBS001();
        
        ButtonEvent btnEvent = new ButtonEvent(this);
        btnMyPress.addSelectionListener(btnEvent);
    }
    
    public Text getTxtName()
    {
        return this.txtName;
    }
    
    class ButtonEvent extends SelectionAdapter
    {
        testEvent001 ev001=null;
        public ButtonEvent(testEvent001 evt)
        {
            ev001=evt;
        }
        
        public void widgetSelected(SelectionEvent e)
        {
            if (e.getSource()==btnMyPress)
            {
                //txtName.setText(testBS.GetName(ev001.txtName.getText()));
                txtName.setText(testBS.GetName(ev001));
            }
        }
    }

}

 

 

 

    testBS001.java

   

package com.wy;

public class testBS001 {
    
    public String GetName(String oldValue)
    {
        return "wangyong 2010.3.6  oldValue=[" + oldValue + "]";
    }
    
    public String GetName(testEvent001 e)
    {
        if ((e.getTxtName().getText()==null) || (e.getTxtName().getText().trim().equals("")))
        {
            return "wangyong 2010.3.6  oldValue=[空值]";
        }
        else
        {
            return "wangyong 2010.3.6  oldValue=[" + e.getTxtName().getText() + "]";        
        }
    }

}