Add progress bar and multithreading

.gitignore

@@ -131,4 +131,5 @@ gradle-app.setting
 
 input/
 output/
-watermerk.png
+/*.png
+/*.jp*g

src/main/kotlin/nl/aegeedelft/watermarker/Main.kt

@@ -10,12 +10,15 @@ import java.awt.image.RenderedImage
 import java.io.BufferedInputStream
 import java.io.ByteArrayInputStream
 import java.io.File
+import java.util.concurrent.atomic.AtomicInteger
 import javax.imageio.IIOImage
 import javax.imageio.ImageIO
 import javax.imageio.ImageWriteParam
 import javax.imageio.stream.MemoryCacheImageOutputStream
 import javax.swing.*
 import javax.swing.filechooser.FileFilter
+import kotlin.concurrent.fixedRateTimer
+import kotlin.concurrent.thread
 
 
 @Language("RegExp")
@@ -23,6 +26,13 @@ val filenameRegex = ".*\\.(png|jpe?g|bmp)".toRegex()
 
 val jf = JFrame("WaterMarker")
 
+val counter = AtomicInteger()
+val runbtn = JButton("Run!")
+
+val pbar = JProgressBar()
+
+val dlg = JDialog(jf, "Progress Dialog", true)
+
 
 fun main(args: Array<String>) {
     var watermark: File? = null
@@ -95,11 +105,13 @@ fun main(args: Array<String>) {
         }.forceToCenter()
     )
     box.add(wms.forceToCenter())
-
+    runbtn.apply {
-    box.add(JButton("Run!").apply {
         addActionListener {
             if (watermark != null && outdir != null && basedir != null) {
+                this.isEnabled = false
+                thread {
                     doTheThing(basedir!!, outdir!!, watermark!!)
+                }
             } else {
                 JOptionPane.showMessageDialog(
                     jf,
@@ -109,7 +121,8 @@ fun main(args: Array<String>) {
                 )
             }
         }
-    }.forceToCenter())
+    }
+    box.add(runbtn.forceToCenter())
 
     jf.add(box, BorderLayout.CENTER)
 
@@ -118,6 +131,11 @@ fun main(args: Array<String>) {
     jf.preferredSize = Dimension(300, 300)
     jf.size = jf.preferredSize
     jf.isVisible = true
+
+    dlg.add(BorderLayout.CENTER, pbar)
+    dlg.defaultCloseOperation = JDialog.DO_NOTHING_ON_CLOSE
+    dlg.setSize(300, 75)
+    dlg.setLocationRelativeTo(jf)
 }
 
 fun doTheThing(basedir: File, outdir: File, watermarkpath: File) {
@@ -126,11 +144,33 @@ fun doTheThing(basedir: File, outdir: File, watermarkpath: File) {
     val scale = 3.6
     //JOptionPane.showMessageDialog(jf, "", "Inserting watermark!", JOptionPane.INFORMATION_MESSAGE, ImageIcon(watermark))
     //FrmPopUpInfo("Inserting Watermark", watermark)
-    for (f in basedir.listFiles().filter { filenameRegex.matches(it.name) }) {
+    val files = basedir.listFiles().filter { filenameRegex.matches(it.name) }.chunked(5)
+    val propersize = files.sumBy { it.size }
+    counter.set(0)
+    SwingUtilities.invokeLater {
+        pbar.value = 0
+        pbar.maximum = propersize
+        dlg.isVisible = true
+    }
+
+    fixedRateTimer("theWait", period = 500, initialDelay = 0) {
+        if (counter.get() == propersize) {
+            SwingUtilities.invokeLater {
+                dlg.isVisible = false
+                runbtn.isEnabled = true
+                this.cancel()
+            }
+        }
+    }
+
+    for (fl in files) {
+        thread {
+            for (f in fl) {
                 if (filenameRegex.matches(f.name.toString()) && !"jpe?g".toRegex().matches(f.extension)) {
                     val image = ImageIO.read(f)
 
-            val combined = addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage
+                    val combined =
+                        addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage
 
                     ImageIO.write(combined, "JPG", File(outdir, f.nameWithoutExtension + ".jpg"))
                 } else {
@@ -142,7 +182,8 @@ fun doTheThing(basedir: File, outdir: File, watermarkpath: File) {
                     val image = reader.read(0)
                     val imageMetadata = reader.getImageMetadata(0)
 
-            val combined = addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage
+                    val combined =
+                        addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage
 
                     val iter = ImageIO.getImageWritersByMIMEType("image/jpeg")
                     val writer = iter.next()
@@ -155,8 +196,14 @@ fun doTheThing(basedir: File, outdir: File, watermarkpath: File) {
                     writer.write(null, ending, iwp)
                     writer.dispose()
                 }
+                SwingUtilities.invokeLater {
+                    pbar.value = counter.incrementAndGet()
                 }
             }
+        }
+    }
+
+}
 
 fun Component.forceToCenter(): Component = JPanel().apply { this.add(this@forceToCenter) }