Groovy笔记(10)_Swing界面-优快云博客

构造器


1、可以生成XML/HTML/SWING等嵌套树状数据结构
2、在语法级别上实现GOF的Builder设计模式
<ul>
<li>NodeBuilder 创建嵌套的节点树</li>
<li>DomBuilder 创建W3C DOM树</li>
<li>SwingBuilder 创建Swing界面</li>
<li>AntBuilder 生成ANT脚本</li>
<li>MarkupBuilder创建XML或HTML标记</li>
</ul>

MarkupBuilder Demo

1、Demo
import groovy.xml.*
//创建生成器
def page = new MarkupBuilder()
//使用伪方法html/head等,参数是闭包
page.html{
 head{title 'Hello'}
 body{
 ul{
 for(count in 1..3){
 li "clat $count"
} 
 }
 }
}
<textarea cols="50" rows="15" name="code" class="xhtml:collapse:showcolumns"><html>
<head>
<title>Hello</title>
</head>
<body>
<ul>
<li>clat1</li>
<li>clat2</lt>
<li>clat3</lt>
</ul>
</body>
</html></textarea>


SwingBuilder构造GUI

1、Demo
import groovy.swing.SwingBuilder
import javax.swing.*
//创建生成器
def sb = new SwingBuilder()
//使用伪方法产生界面
def frame = sb.frame(title:'ToyStore' , location:[100,100],
 size:[400,300],defaultCloseOperation:
 WindowConstants.EXIT_ON_CLOSE){
 label(text:"Hello world")//修改此行重构,在frame中建立了一个标签
 }
frame.pach()
frame.setVisible(true)
//Swing 的伪方法改为大写，再在前面加上J，就是相应组件了

1、更好的组织代码
def sb = new SwingBuilder()
def mainPanel = {
 sb.panel(layout:new GridLayout(2,2,5,5)){
 label(text:'Last name:' , horizontalAlignment : JLabel.RIGHT) //右对齐
 textField(text:'', columns:10) //输入框
 label(text:'First name:' , horizontalAlignment: JLabel.RIGHT)
 textField(text:'' , columns:10)
 }
}
def frame = sb.frame(title:'ToysStore' ,location :[100,100],
size:[400,300],defaultCloseOperation:WindowConstants.EXIT_ON_CLOSE){
 mainPanel() //调用闭包
 }
frame.pack()
frame.setVisible(true)


布局与事件处理

1、
def buttonPanel = {
 sb.panel(constraints : BorderLayout.SOUTH){
 button(text:'OK',actionPerformed:{ println 'OK pressed'})
 button(text:'Cancel',actionPerformed:{println 'Cancel pressed'})
 }
}
def mainPanel ={
 sb.panel(layout : new BorderLayout()){
 label(text:'Is this OK?' , horizontalAlignment : JLabel.CENTER, 
 constraints : BorderLayout.CENTER)
 buttonPanel()
}
}
def frame = sb.frame(title:'ToysStore',location:[100,100] ,size:[400,300],
 defaultCloseOperation: WindowConstants.EXIT_ON_CLOSE){mainPanel()}
frame.pack(); frame.setVisible(true)



BoxLayout

1、建立4个横向排列的按钮
import groovy.swing.SwingBuidler
import javax.swing.*
import java.awt.*
class FixedButton extends JButton{ // 使按钮大小固定
 Dimension getMinimumSize(){return BUTTONSIZE}
 Dimension getMaximunSize(){return BUTTONSIZE}
 Dimension getPreferredSize(){return BUTTONSIZE}
 private static final BUTTONSIZE = new Dimension(80,30)
}
def sb = new SwingBuilder()
def mainPanel = {
 sb.panel(layout:new BorderLayout()){
 hbox(constraints: BorderLayout.WEST){ // hbox可以换成vbox,变成纵向排列
 def buttons = ['One','Two','Three','Four']
buttons.each{but -> sb.widget(new FixedButton(text: but))}
 }
 }
}
}
def frame = sb.frame(title: 'Example 10' ,location:[100,100],size:[400,300]
 ,defaultCloseOperation: WindowConstants.EXIT_ON_CLOSE){mainPanel()}
frame.pack() ; frame.setVisible(true)



JList/JScrollPane

1、selection
import groovy.swint.SwingBuilder
import javax.swing.*
import java.awt.*
class ToyListModel extends DefaultListModel{
 ToyListModel(list){ super()
list.each{item -> this.addElement(item)} // 列表添加到模型中
}}
def sb = new SwingBuilder()
def listPanel={
 sb.panel(constraints: BorderLayout.CENTER){
 scrollPane(){ // 加入滚动条
def toyList = ['toy1','toy2','toy3','toy4']
toysList = list(model : new ToyListModel(toylist), //定义列表 
selectionMode: ListSelectionModel.SINGLE_SELECTION,
selectedIndex: 0 ,visbleRowCount:4)
 }
}
}


2、
def mainPanel = {
 sb.panel(layout: new BorderLayout()){
 listPanel()
 }
}
def fram = sb.frame(title : 'ToyStore' ,location :[100,100],
 size:[400,300],defaultCloseOperation:WindowConstants.EXIT_ONT_CLOSE){
 mainPanel()
}



JTable/JScrollPane

1、表格
import ....同上
import java.swing.table.*

def sb = new SwingBuilder()
def tablePanel= {
 sb.panel(constrains: BorderLayout.CENTER){
 scrollPane(){
 table(selectionMode: ListSelectionModel.SINGLE_SELECTION){
def toysList = [[toyName:'toy1' , unitPrice: '100'],
[toyName :'toy2', unitPrice:'200']]
tableModel(list:toysList){
 closureColumn(header: 'Toy Name' ,read :{row ->return row.toyName}) //指定列
 closureColumn(header: 'Unit Price',read:{row -> return row.unitPrice}))
 }
 }
 }
}
}
2、然后可以像上面一样，添加Jframe框架。