[英]Scala swing repaint
因此,我对scala感到非常新。 我正在用GUI实现Conways的生活游戏。 当2D阵列更改时,我不知道如何更新面板。 有人能指出我正确的方向吗? 我的整个代码如下:
import swing._
import java.awt.{Color, Graphics2D, Dimension}
// initialize variables
// infinite plane variable
var infCurrent = scala.collection.mutable.ListBuffer[List[Int]]()
var infNext = scala.collection.mutable.ListBuffer[List[Int]]()
var infNext1 = scala.collection.mutable.ListBuffer[List[Int]]()
var infLifeTester = scala.collection.mutable.MutableList[List[Int]]()
// general variables
var lifeCount = 0
var yes = 1
// displayed variables
val xDim = 20
val yDim = 20
var currentState = Array.ofDim[Int](xDim, yDim)
var colorIndexList = scala.collection.mutable.ListBuffer[List[Int]]()
var colorData = Array.ofDim[Color](xDim, yDim)
// initial value
infCurrent = scala.collection.mutable.ListBuffer(List(6,6), List(6,7), List(6,8), List(5,8), List(4,7))
// this function tests if a CURRENTLY ALIVE CELL on the INF PLANE STAYS ALIVE
def infStayAlive(current: scala.collection.mutable.ListBuffer[List[Int]]): scala.collection.mutable.ListBuffer[List[Int]] = {
for (i <- current) {
var a = i(0)
var b = i(1)
if (current.contains(List(a - 1, b - 1))) lifeCount += 1
if (current.contains(List(a - 1, b))) lifeCount += 1
if (current.contains(List(a - 1, b + 1))) lifeCount += 1
if (current.contains(List(a, b - 1))) lifeCount += 1
if (current.contains(List(a, b + 1))) lifeCount += 1
if (current.contains(List(a + 1, b - 1))) lifeCount += 1
if (current.contains(List(a + 1, b))) lifeCount += 1
if (current.contains(List(a + 1, b + 1))) lifeCount += 1
if (lifeCount == 2) infNext = infNext :+ i
lifeCount = 0
}
return infNext
}
// this function gets ALL NEIGHBORS for what's on the INF PLANE
def infGetNeighbors(current: scala.collection.mutable.ListBuffer[List[Int]]): scala.collection.mutable.MutableList[List[Int]] = {
for (i <- current) {
var a = i(0)
var b = i(1)
infLifeTester = infLifeTester :+ List(a - 1, b - 1)
infLifeTester = infLifeTester :+ List(a - 1, b)
infLifeTester = infLifeTester :+ List(a - 1, b + 1)
infLifeTester = infLifeTester :+ List(a, b - 1)
infLifeTester = infLifeTester :+ List(a, b + 1)
infLifeTester = infLifeTester :+ List(a + 1, b - 1)
infLifeTester = infLifeTester :+ List(a + 1,b)
infLifeTester = infLifeTester :+ List(a + 1, b + 1)
}
infLifeTester = infLifeTester.distinct
return infLifeTester
}
// this function determines whether cells on the INF PLANE DIE or COME ALIVE
def infComeAlive(infLifeTester: scala.collection.mutable.MutableList[List[Int]]): scala.collection.mutable.ListBuffer[List[Int]] = {
for(i <- infLifeTester) {
var a = i(0)
var b = i(1)
if (infCurrent.contains(List(a - 1, b - 1))) lifeCount += 1
if (infCurrent.contains(List(a - 1, b))) lifeCount += 1
if (infCurrent.contains(List(a - 1, b + 1))) lifeCount += 1
if (infCurrent.contains(List(a, b - 1))) lifeCount += 1
if (infCurrent.contains(List(a, b + 1))) lifeCount += 1
if (infCurrent.contains(List(a + 1, b - 1))) lifeCount += 1
if (infCurrent.contains(List(a + 1, b))) lifeCount += 1
if (infCurrent.contains(List(a + 1, b + 1))) lifeCount += 1
if (lifeCount == 3) infNext1 = infNext1 :+ i
lifeCount = 0
}
infNext1 = infNext1.distinct
return infNext1
}
def printGrid(infCurrent: scala.collection.mutable.ListBuffer[List[Int]]): Array[Array[Int]] = {
for(i <- infCurrent) {
if(i(0) >= 0) {
if(i(0) < xDim) {
if(i(1) >= 0) {
if(i(1) < yDim) {
currentState(i(0))(i(1)) = 1
colorIndexList = colorIndexList :+ i
}
}
}
}
}
return currentState
}
def colorGrid(colorIndexList: scala.collection.mutable.ListBuffer[List[Int]]): Array[Array[Color]] = {
for (i <- colorIndexList) {
colorData(i(0))(i(1)) = Color.WHITE
}
return colorData
}
// define panel class
class DataPanel(data: Array[Array[Color]]) extends Panel {
override def paintComponent(g: Graphics2D) {
val dx = g.getClipBounds.width.toFloat / data.length
val dy = g.getClipBounds.height.toFloat / data.map(_.length).max
for {
x <- 0 until data.length
y <- 0 until data(x).length
x1 = (x * dx).toInt
y1 = (y * dy).toInt
x2 = ((x + 1) * dx).toInt
y2 = ((y + 1) * dy).toInt
} {
data(x)(y) match {
case c: Color => g.setColor(c)
case _ => g.setColor(Color.BLACK)
repaint
}
g.fillRect(x1, y1, x2 - x1, y2 - y1)
println("hi")
}
println("hey")
}
}
// make swing app
object Draw extends SimpleSwingApplication {
val data = colorData
def top = new MainFrame {
background = Color.RED
title = "Shombo's Game of Life"
val button = new Button {
text = "Stahhhp!!"
}
val life = new DataPanel(data) {
preferredSize = new Dimension(500, 500)
}
contents = new BoxPanel(Orientation.Vertical) {
contents += life
contents += button
}
}
}
Draw.top.visible = true
while(yes == 1) {
infLifeTester = infGetNeighbors(infCurrent)
infNext = infStayAlive(infCurrent)
infNext1 = infComeAlive(infLifeTester)
infNext = scala.collection.mutable.ListBuffer.concat(infNext, infNext1)
infCurrent = infNext
infNext = scala.collection.mutable.ListBuffer[List[Int]]()
infNext1 = scala.collection.mutable.ListBuffer[List[Int]]()
infLifeTester = scala.collection.mutable.MutableList[List[Int]]()
currentState = printGrid(infCurrent)
println(currentState.deep.mkString("\n"))
//println("\n")
colorData = colorGrid(colorIndexList)
Draw.top.contents.repaint()
currentState = Array.ofDim[Int](xDim, yDim)
colorIndexList = scala.collection.mutable.ListBuffer[List[Int]]()
colorData = Array.ofDim[Color](xDim, yDim)
yes = 1
}
您不清楚将var
可变元素混合在一起的情况。 您应该将var
与被替换的不可变状态结合使用,或者使用可变状态(例如数组),但要对其进行就地更新,并且不要创建新的数组。
在您的应用程序中,创建一个DataPanel
实例,该实例将存储在colorData
的数组作为参数。 但是然后在迭代中,您并没有更新 colorData
的内容 ,而是实际上创建了一个全新的数组并替换了变量colorData
的值:
colorData = Array.ofDim[Color](xDim, yDim)
因此,在第一次迭代之后,您的全局状态与DataPanel
存储的状态不同。
如果您在colorData
重新使用该数组, colorData
需要更改colorGrid
以将黑色分配给不活动的单元格。 现在,您将null
色用作黑色,将Color.WHITE
用作白色。 定义val colorData = Array.ofDim[Boolean](xDim, yDim)
会更有意义。 在colorGrid
您将首先将所有元素设置为false
,然后遍历colorIndexList
。
您应该将迭代定义为在每个步骤中调用的函数。 现在,您有一个无限循环while(yes == 1)
因为yes
永远不会改变。 执行此操作将冻结您的计算机。
还要注意,调用Draw.top
并不是这样,因为您将其定义为一个函数。 每次调用时,都会创建一个新窗口。 始终使用lazy val top =
可以防止出现此问题。
您的代码仍然很混乱,但是至少您还有一些需要改进的地方。 这是一个最小的工作示例,仅包含上面的更改:
import scala.collection.mutable.ListBuffer
val colorData = Array.ofDim[Boolean](xDim, yDim)
def colorGrid(colorIndexList: ListBuffer[List[Int]]): Unit = {
colorData.foreach { row => java.util.Arrays.fill(row, false) } // all 'black'
for (i <- colorIndexList) {
colorData(i(0))(i(1)) = true // some 'white'
}
}
class DataPanel(data: Array[Array[Boolean]]) extends Panel {
override def paintComponent(g: Graphics2D): Unit = {
val dx = g.getClipBounds.width.toFloat / data.length
val dy = g.getClipBounds.height.toFloat / data.map(_.length).max
for {
x <- 0 until data.length
y <- 0 until data(x).length
x1 = (x * dx).toInt
y1 = (y * dy).toInt
x2 = ((x + 1) * dx).toInt
y2 = ((y + 1) * dy).toInt
} {
g.setColor(if (data(x)(y)) Color.black else Color.white) // !
g.fillRect(x1, y1, x2 - x1, y2 - y1)
}
}
}
def step(): Unit = {
infLifeTester = infGetNeighbors(infCurrent)
infNext = infStayAlive(infCurrent)
infNext1 = infComeAlive(infLifeTester)
infNext = scala.collection.mutable.ListBuffer.concat(infNext, infNext1)
infCurrent = infNext
infNext = scala.collection.mutable.ListBuffer[List[Int]]()
infNext1 = scala.collection.mutable.ListBuffer[List[Int]]()
infLifeTester = scala.collection.mutable.MutableList[List[Int]]()
currentState = printGrid(infCurrent)
println(currentState.deep.mkString("\n"))
//println("\n")
colorGrid(colorIndexList)
currentState = Array.ofDim[Int](xDim, yDim)
colorIndexList = scala.collection.mutable.ListBuffer[List[Int]]()
}
object Draw extends SimpleSwingApplication {
lazy val life = new DataPanel(colorData) {
preferredSize = new Dimension(500, 500)
}
lazy val top = new MainFrame {
background = Color.RED
title = "Shombo's Game of Life"
val button = Button("Step") {
step() // updates colorData
life.repaint() // refreshes view
}
contents = new BoxPanel(Orientation.Vertical) {
contents += life
contents += button
}
}
}
运行: Draw.main(Array())
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.