OlegIlyenko/Downloader.scala

## Downloader.scala
import javax.swing.UIManager
import java.net.URL
import java.awt.Dimension
import java.io.Closeable

import swing._

object Downloader extends SimpleSwingApplication {
  UIManager.getInstalledLookAndFeels
    .filter(_.getName contains "Nimbus").headOption
    .map(_.getClassName).foreach(UIManager setLookAndFeel _)

  val url = new TextField(35)
  val progress = new ProgressBar
  val info = new Label("Please start download")

  def top = new MainFrame {
    title = "File Downloader"

    contents = new BoxPanel(Orientation.Vertical) {
      contents += new FlowPanel(FlowPanel.Alignment.Right)(
        new Label("URL:"),
        url,
        Button("Download") {
          import Util._

          thread {
            val conn = new URL(url.text).openConnection
            val tracker = (p: Progress) => Swing.onEDT {
              info.text = "<html>" + p.formattedMetrics.mkString("<br>") +"</html>"
              progress.value = p.percent
            }

            withResource(ProgressInputStream(conn.getInputStream, conn.getContentLength, tracker)) { in =>
              val buf = new Array[Byte](1024)

              while(in.read(buf) != -1) {
                println("Reading 1 kb")
              }
            }
          }
        }
      )

      contents += progress
      contents += new FlowPanel(FlowPanel.Alignment.Left)(info)
    }

    size = new Dimension(550, 250)
    centerOnScreen()
  }
}

object Util {
  def thread(fn: => Unit) = {
    val thread = new Thread(Swing.Runnable(fn))
    thread.start()
    thread
  }

  def withResource[T <: Closeable, R](res: T)(fn: T => R) =
    try {
      fn(res)
    } finally {
      try {
        res.close()
      } catch {
        case e: Exception => e.printStackTrace()
      }
    }
}
	import javax.swing.UIManager
	import java.net.URL
	import java.awt.Dimension
	import java.io.Closeable

	import swing._

	object Downloader extends SimpleSwingApplication {
	UIManager.getInstalledLookAndFeels
	.filter(_.getName contains "Nimbus").headOption
	.map(_.getClassName).foreach(UIManager setLookAndFeel _)

	val url = new TextField(35)
	val progress = new ProgressBar
	val info = new Label("Please start download")

	def top = new MainFrame {
	title = "File Downloader"

	contents = new BoxPanel(Orientation.Vertical) {
	contents += new FlowPanel(FlowPanel.Alignment.Right)(
	new Label("URL:"),
	url,
	Button("Download") {
	import Util._

	thread {
	val conn = new URL(url.text).openConnection
	val tracker = (p: Progress) => Swing.onEDT {
	info.text = "<html>" + p.formattedMetrics.mkString("<br>") +"</html>"
	progress.value = p.percent
	}

	withResource(ProgressInputStream(conn.getInputStream, conn.getContentLength, tracker)) { in =>
	val buf = new Array[Byte](1024)

	while(in.read(buf) != -1) {
	println("Reading 1 kb")
	}
	}
	}
	}
	)

	contents += progress
	contents += new FlowPanel(FlowPanel.Alignment.Left)(info)
	}

	size = new Dimension(550, 250)
	centerOnScreen()
	}
	}

	object Util {
	def thread(fn: => Unit) = {
	val thread = new Thread(Swing.Runnable(fn))
	thread.start()
	thread
	}

	def withResource[T <: Closeable, R](res: T)(fn: T => R) =
	try {
	fn(res)
	} finally {
	try {
	res.close()
	} catch {
	case e: Exception => e.printStackTrace()
	}
	}
	}