Groovy SwingBuilder：用于更改面板颜色的按钮

如何解决Groovy SwingBuilder：用于更改面板颜色的按钮

|| 为什么此代码失败？ 我想更改一系列动态构建的面板中的一个面板的颜色（事先未知的面板总数）。 出于某种原因，该代码在引用特定面板的名称（例如\'panel2 \'）时有效，但在我动态引用它（\'panelID \'）时则无效。

import groovy.swing.SwingBuilder
import javax.swing.WindowConstants as WC
import javax.swing.JOptionPane
import javax.swing.BoxLayout as BXL

swing = new SwingBuilder()
frame = swing.frame(title:\'test\',defaultCloSEOperation:WC.disPOSE_ON_CLOSE) {

    panel(id:\'mainPanel\'){
        def panelID 

        (1..6).each {
            panelID = \'panel\' + it

            panel(alignmentX: 0f,id: panelID,opaque:true,background : java.awt.Color.GREEN){
                label(\'description\') 
                textField(id: \"description$it\",text: panelID,columns: 70 )
                button(id: \"button$panelID\",actionPerformed : {
                    panelID.background = java.awt.Color.RED
                    panelID.repaint()                       
                })
            }
        }
        BoxLayout(axis: BXL.Y_AXIS)

        panel(id:\'secondPanel\',alignmentX: 0f){                       
            button(\'Quit\',actionPerformed:{
                dispose()
            })
        }
    }       
}
frame.pack()
frame.show()

    

解决方法

        要基于其ID获得元素，您需要将ID作为SwingBuilder的参数进行访问，如下所示：

import groovy.swing.SwingBuilder
import javax.swing.WindowConstants as WC
import javax.swing.JOptionPane
import javax.swing.BoxLayout as BXL

swing = new SwingBuilder()
frame = swing.frame(title:\'test\',pack:true,visible:true,defaultCloseOperation:WC.DISPOSE_ON_CLOSE) {
    panel(id:\'mainPanel\'){
        (1..6).each { num ->
            def panelID = \"panel$num\"
            def pane = panel( alignmentX:0f,id:panelID,background:java.awt.Color.GREEN ) {
                label(\'description\') 
                textField(id: \"description$num\",text:panelID,columns: 70 )
                button(id: \"buttonpanel$num\",actionPerformed : {
                    swing.\"$panelID\".background = java.awt.Color.RED
                })
            }
        }
        boxLayout(axis: BXL.Y_AXIS)

        panel(id:\'secondPanel\',alignmentX: 0f){                       
            button(\'Quit\',actionPerformed:{
                frame.visible = false
            })
        }
    }       
}