rewrite the mediapicker dialog, make it work like picking directories

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt

@@ -18,7 +18,6 @@ import com.bumptech.glide.request.RequestOptions
 import com.bumptech.glide.request.target.SimpleTarget
 import com.bumptech.glide.request.transition.Transition
 import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.dialogs.RadioGroupDialog
 import com.simplemobiletools.commons.extensions.*
@@ -343,8 +342,7 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
             return
 
         mIsGettingMedia = true
-        val token = object : TypeToken<List<Medium>>() {}.type
-        val media = Gson().fromJson<ArrayList<Medium>>(config.loadFolderMedia(mPath), token) ?: ArrayList(1)
+        val media = getCachedMedia(mPath)
         if (media.isNotEmpty() && !mLoadedInitialPhotos) {
             gotMedia(media, true)
         } else {

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/PickDirectoryDialog.kt

@@ -3,7 +3,6 @@ package com.simplemobiletools.gallery.dialogs
 import android.support.v7.app.AlertDialog
 import android.support.v7.widget.GridLayoutManager
 import android.view.LayoutInflater
-import android.view.View
 import com.simplemobiletools.commons.dialogs.FilePickerDialog
 import com.simplemobiletools.commons.extensions.beGoneIf
 import com.simplemobiletools.commons.extensions.beVisibleIf
@@ -22,8 +21,8 @@ import kotlinx.android.synthetic.main.dialog_directory_picker.view.*
 
 class PickDirectoryDialog(val activity: SimpleActivity, val sourcePath: String, val callback: (path: String) -> Unit) {
     var dialog: AlertDialog
-    var shownDirectories: ArrayList<Directory> = ArrayList()
-    var view: View = LayoutInflater.from(activity).inflate(R.layout.dialog_directory_picker, null)
+    var shownDirectories = ArrayList<Directory>()
+    var view = LayoutInflater.from(activity).inflate(R.layout.dialog_directory_picker, null)
     var isGridViewType = activity.config.viewTypeFolders == VIEW_TYPE_GRID
 
     init {

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/PickMediumDialog.kt

@@ -1,27 +1,32 @@
 package com.simplemobiletools.gallery.dialogs
 
 import android.support.v7.app.AlertDialog
-import android.support.v7.widget.RecyclerView
+import android.support.v7.widget.GridLayoutManager
 import android.view.LayoutInflater
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
+import com.simplemobiletools.commons.extensions.beGoneIf
+import com.simplemobiletools.commons.extensions.beVisibleIf
 import com.simplemobiletools.commons.extensions.setupDialogStuff
 import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.activities.SimpleActivity
 import com.simplemobiletools.gallery.adapters.MediaAdapter
 import com.simplemobiletools.gallery.asynctasks.GetMediaAsynctask
 import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.extensions.getCachedMedia
+import com.simplemobiletools.gallery.helpers.VIEW_TYPE_GRID
 import com.simplemobiletools.gallery.models.Medium
 import kotlinx.android.synthetic.main.dialog_medium_picker.view.*
 
 class PickMediumDialog(val activity: SimpleActivity, val path: String, val callback: (path: String) -> Unit) {
     var dialog: AlertDialog
-    var mediaGrid: RecyclerView
-    var shownMedia: ArrayList<Medium> = ArrayList()
+    var shownMedia = ArrayList<Medium>()
+    val view = LayoutInflater.from(activity).inflate(R.layout.dialog_medium_picker, null)
+    var isGridViewType = activity.config.viewTypeFiles == VIEW_TYPE_GRID
 
     init {
-        val view = LayoutInflater.from(activity).inflate(R.layout.dialog_medium_picker, null)
-        mediaGrid = view.media_grid
+        (view.media_grid.layoutManager as GridLayoutManager).apply {
+            orientation = if (activity.config.scrollHorizontally && isGridViewType) GridLayoutManager.HORIZONTAL else GridLayoutManager.VERTICAL
+            spanCount = if (isGridViewType) activity.config.mediaColumnCnt else 1
+        }
 
         dialog = AlertDialog.Builder(activity)
                 .setPositiveButton(R.string.ok, null)
@@ -29,10 +34,7 @@ class PickMediumDialog(val activity: SimpleActivity, val path: String, val callb
                 .create().apply {
             activity.setupDialogStuff(view, this, R.string.select_photo)
 
-            val token = object : TypeToken<List<Medium>>() {}.type
-            var media = Gson().fromJson<ArrayList<Medium>>(activity.config.loadFolderMedia(path), token) ?: ArrayList(1)
-            media = media.filter { !it.video } as ArrayList
-
+            val media = activity.getCachedMedia(path).filter { !it.video } as ArrayList
             if (media.isNotEmpty()) {
                 gotMedia(media)
             }
@@ -52,6 +54,22 @@ class PickMediumDialog(val activity: SimpleActivity, val path: String, val callb
             callback(it.path)
             dialog.dismiss()
         }
-        mediaGrid.adapter = adapter
+
+        val scrollHorizontally = activity.config.scrollHorizontally && isGridViewType
+        view.apply {
+            media_grid.adapter = adapter
+
+            media_vertical_fastscroller.isHorizontal = false
+            media_vertical_fastscroller.beGoneIf(scrollHorizontally)
+
+            media_horizontal_fastscroller.isHorizontal = true
+            media_horizontal_fastscroller.beVisibleIf(scrollHorizontally)
+
+            if (scrollHorizontally) {
+                media_horizontal_fastscroller.setViews(media_grid)
+            } else {
+                media_vertical_fastscroller.setViews(media_grid)
+            }
+        }
     }
 }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/activity.kt

@@ -337,3 +337,8 @@ fun Activity.getCachedDirectories(): ArrayList<Directory> {
     val token = object : TypeToken<List<Directory>>() {}.type
     return Gson().fromJson<ArrayList<Directory>>(config.directories, token) ?: ArrayList<Directory>(1)
 }
+
+fun Activity.getCachedMedia(path: String): ArrayList<Medium> {
+    val token = object : TypeToken<List<Medium>>() {}.type
+    return Gson().fromJson<ArrayList<Medium>>(config.loadFolderMedia(path), token) ?: ArrayList(1)
+}

app/src/main/res/layout/dialog_medium_picker.xml

@@ -1,10 +1,54 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.RecyclerView
+<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/media_grid"
+    android:id="@+id/media_grid_holder"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:paddingTop="@dimen/activity_margin"
-    app:layoutManager="android.support.v7.widget.GridLayoutManager"
-    app:spanCount="@integer/media_columns_vertical_scroll"/>
+    android:paddingTop="@dimen/activity_margin">
+
+    <com.simplemobiletools.commons.views.MyScalableRecyclerView
+        android:id="@+id/media_grid"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scrollbars="none"
+        app:layoutManager="android.support.v7.widget.GridLayoutManager"
+        app:spanCount="@integer/media_columns_vertical_scroll"/>
+
+    <com.simplemobiletools.commons.views.FastScroller
+        android:id="@+id/media_vertical_fastscroller"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:paddingLeft="@dimen/normal_margin"
+        android:paddingStart="@dimen/normal_margin">
+
+        <ImageView
+            android:id="@+id/fastscroller_handle_vertical"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end"
+            android:alpha="0"
+            android:background="@drawable/fastscroller_handle_vertical"/>
+
+    </com.simplemobiletools.commons.views.FastScroller>
+
+    <com.simplemobiletools.commons.views.FastScroller
+        android:id="@+id/media_horizontal_fastscroller"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:paddingTop="@dimen/normal_margin">
+
+        <ImageView
+            android:id="@+id/fastscroller_handle_horizontal"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom"
+            android:alpha="0"
+            android:background="@drawable/fastscroller_handle_horizontal"/>
+
+    </com.simplemobiletools.commons.views.FastScroller>
+</RelativeLayout>