Refined kotlin sheet logic and updated screenshots on Linux

Author: shai-almog

scripts/android/screenshots/BrowserComponent.png

@@ -3,20 +3,30 @@ package com.codenameone.examples.hellocodenameone.tests
 import com.codename1.components.Accordion
 import com.codename1.components.MultiButton
 import com.codename1.components.Switch
+import com.codename1.testing.TestUtils
 import com.codename1.ui.Button
 import com.codename1.ui.CheckBox
 import com.codename1.ui.Container
+import com.codename1.ui.Form
 import com.codename1.ui.Label
 import com.codename1.ui.Sheet
 import com.codename1.ui.Slider
 import com.codename1.ui.TextArea
 import com.codename1.ui.TextField
 import com.codename1.ui.layouts.BoxLayout
 import com.codename1.ui.util.UITimer
+import com.codenameone.examples.hellocodenameone.tests.Cn1ssDeviceRunnerHelper
+import java.util.concurrent.CountDownLatch
 
 class KotlinUiTest : BaseTest() {
     override fun runTest(): Boolean {
-        val kotlinForm = createForm("Kotlin", BoxLayout.y(), "kotlin")
+        val latch = CountDownLatch(1)
+        val kotlinForm =  object : Form("Kotlin", BoxLayout.y()) {
+            override fun onShowCompleted() {
+                super.onShowCompleted()
+                latch.countDown()
+            }
+        }
         kotlinForm.addAll(
                 Label("Kotlin UI Test Components"),
                 Button("Kotlin Button"),
@@ -58,6 +68,16 @@ class KotlinUiTest : BaseTest() {
         sheet.contentPane.add(Label("This is a sheet covering part of the screen"))
         sheet.show(0)
 
+        var timeout = 100;
+        while (sheet.parent == null && latch.count > 0) {
+            TestUtils.waitFor(10)
+            timeout--
+            TestUtils.assertNotEqual(0, timeout)
+        }
+
+        Cn1ssDeviceRunnerHelper.emitCurrentFormScreenshot("kotlin")
+        done()
+
         return true
     }
 }