From 86a5107cc6590ff592036fae9a60b7c92b7e1492 Mon Sep 17 00:00:00 2001
From: tibbi <tibor@kaputa.sk>
Date: Sat, 5 Aug 2017 12:27:48 +0200
Subject: [PATCH] adding some basic slideshow functionality

---
 .../gallery/activities/ViewPagerActivity.kt   | 21 +++++++++++++++++++
 .../gallery/dialogs/SlideshowDialog.kt        |  4 ++--
 .../gallery/helpers/Config.kt                 |  2 +-
 .../gallery/helpers/Constants.kt              |  2 +-
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
index 6b6c47cf2..e77a47a48 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt
@@ -15,6 +15,7 @@ import android.media.ExifInterface
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
+import android.os.Handler
 import android.provider.MediaStore
 import android.support.v4.view.ViewPager
 import android.util.DisplayMetrics
@@ -51,6 +52,8 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     private var mRotationDegrees = 0f
     private var mLastHandledOrientation = 0
     private var mPrevHashcode = 0
+    private var mSlideshowHandler = Handler()
+    private var mSlideshowInterval = SLIDESHOW_DEFAULT_INTERVAL
 
     companion object {
         var screenWidth = 0
@@ -189,6 +192,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
     override fun onPause() {
         super.onPause()
         mOrientationEventListener.disable()
+        stopSlideshow()
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -256,13 +260,29 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
 
     private fun startSlideshow() {
         hideSystemUI()
+        mSlideshowInterval = config.slideshowInterval
         mIsSlideshowActive = true
+        scheduleSwipe()
+        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
     }
 
     private fun stopSlideshow() {
         if (mIsSlideshowActive) {
             showSystemUI()
             mIsSlideshowActive = false
+            mSlideshowHandler.removeCallbacksAndMessages(null)
+            window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+        }
+    }
+
+    private fun scheduleSwipe() {
+        mSlideshowHandler.removeCallbacksAndMessages(null)
+        if (mIsSlideshowActive) {
+            mSlideshowHandler.postDelayed({
+                if (mIsSlideshowActive && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1 && !isDestroyed) {
+                    view_pager.currentItem = ++view_pager.currentItem
+                }
+            }, mSlideshowInterval * 1000L)
         }
     }
 
@@ -587,6 +607,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
         updateActionbarTitle()
         mRotationDegrees = 0f
         supportInvalidateOptionsMenu()
+        scheduleSwipe()
     }
 
     override fun onPageScrollStateChanged(state: Int) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/SlideshowDialog.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/SlideshowDialog.kt
index 94533b0e7..8bc0ca1ff 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/SlideshowDialog.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/SlideshowDialog.kt
@@ -8,7 +8,7 @@ import com.simplemobiletools.commons.extensions.setupDialogStuff
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.extensions.config
-import com.simplemobiletools.gallery.helpers.SLIDESHOW_DEFAULT_DURATION
+import com.simplemobiletools.gallery.helpers.SLIDESHOW_DEFAULT_INTERVAL
 import kotlinx.android.synthetic.main.dialog_slideshow.view.*
 
 class SlideshowDialog(val activity: SimpleActivity, val callback: () -> Unit) {
@@ -61,7 +61,7 @@ class SlideshowDialog(val activity: SimpleActivity, val callback: () -> Unit) {
     private fun dialogConfirmed() {
         var interval = view.interval_value.text.toString()
         if (interval.trim('0').isEmpty())
-            interval = SLIDESHOW_DEFAULT_DURATION.toString()
+            interval = SLIDESHOW_DEFAULT_INTERVAL.toString()
 
         activity.config.apply {
             slideshowInterval = interval.toInt()
diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt
index 32632a0d5..a80d599d8 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Config.kt
@@ -234,7 +234,7 @@ class Config(context: Context) : BaseConfig(context) {
         set(replaceShare) = prefs.edit().putBoolean(REPLACE_SHARE_WITH_ROTATE, replaceShare).apply()
 
     var slideshowInterval: Int
-        get() = prefs.getInt(SLIDESHOW_INTERVAL, SLIDESHOW_DEFAULT_DURATION)
+        get() = prefs.getInt(SLIDESHOW_INTERVAL, SLIDESHOW_DEFAULT_INTERVAL)
         set(slideshowInterval) = prefs.edit().putInt(SLIDESHOW_INTERVAL, slideshowInterval).apply()
 
     var slideshowIncludeVideos: Boolean
diff --git a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt
index 465904cea..f3350813f 100644
--- a/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/gallery/helpers/Constants.kt
@@ -39,7 +39,7 @@ val SLIDESHOW_INTERVAL = "slideshow_interval"
 val SLIDESHOW_INCLUDE_VIDEOS = "slideshow_include_videos"
 val SLIDESHOW_RANDOM_ORDER = "slideshow_random_order"
 val SLIDESHOW_USE_FADE = "slideshow_use_fade"
-val SLIDESHOW_DEFAULT_DURATION = 5
+val SLIDESHOW_DEFAULT_INTERVAL = 5
 
 val NOMEDIA = ".nomedia"