如何实例化scala.swing.event.MousePressed?我尝试了以下但它抱怨构造函数。 MousePressed的声明说明了一个关于Component peer的事情......但我不确定如何包含它。
import scala.swing.event.MousePressed
import java.awt.Point
object TypeIssue {
val c = new Label()
val test = new MousePressed(c, new Point(0,0), 0, 0, 1, false)
}
错误是: 重载方法构造函数MousePressed with alternatives:(e:java.awt.event.MouseEvent)scala.swing.event.MousePressed(source:scala.swing.Component,point:java.awt.Point,modifiers:scala.swing.event。 Key.Modifiers,clicks:Int,triggersPopup:Boolean)(peer:java.awt.event.MouseEvent)scala.swing.event.MousePressed不能应用于(scala.swing.Label,java.awt.Point,Int,Int) ,Int,Boolean)
答案 0 :(得分:1)
想出来:
import scala.swing.event.MousePressed
import java.awt.Point
import scala.swing.Label
object TypeIssue {
val c = new Label()
val test = MousePressed(c, new Point(0,0), 0, 0, false)(new java.awt.event.MouseEvent(c.peer, 0, 0, 0, 0, 0, 0, false))
}
答案 1 :(得分:1)
val test =
new MousePressed(new java.awt.event.MouseEvent(c.peer, 0, 0, 0, 0, 0, 0, false))
我们需要在MousePressed之前使用new
,因为我们正在使用case类的辅助构造函数(尽管为什么这是必要的从未解释过。)