为什么这段代码失败了? 我想改变一系列几个面板中一个面板的颜色,动态构造(预先未知的面板总数)。
出于某种原因,此代码在引用特定面板的名称时起作用(例如“panel2”),但在动态引用它时不起作用('panelID')。
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", text: 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()
答案 0 :(得分:2)
要根据它的ID获取元素,您需要访问ID作为SwingBuilder的参数,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$num", text:panelID, actionPerformed : {
swing."$panelID".background = java.awt.Color.RED
})
}
}
boxLayout(axis: BXL.Y_AXIS)
panel(id:'secondPanel' , alignmentX: 0f){
button('Quit', actionPerformed:{
frame.visible = false
})
}
}
}