added menu options for changing the column counts

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

@@ -70,6 +70,9 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
             return false
 
         menuInflater.inflate(R.menu.menu_main, menu)
+
+        menu.findItem(R.id.increase_column_count).isVisible = config.dirColumnCnt < 10
+        menu.findItem(R.id.reduce_column_count).isVisible = config.dirColumnCnt > 1
         return true
     }
 
@@ -78,6 +81,8 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
             R.id.sort -> showSortingDialog()
             R.id.open_camera -> launchCamera()
             R.id.show_all -> showAllMedia()
+            R.id.increase_column_count -> increaseColumnCount()
+            R.id.reduce_column_count -> reduceColumnCount()
             R.id.settings -> launchSettings()
             R.id.about -> launchAbout()
             else -> return super.onOptionsItemSelected(item)
@@ -216,20 +221,30 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
         MyScalableRecyclerView.mListener = object : MyScalableRecyclerView.ZoomListener {
             override fun zoomIn() {
                 if (layoutManager.spanCount > 1) {
-                    config.dirColumnCnt = --layoutManager.spanCount
+                    reduceColumnCount()
                     DirectoryAdapter.actMode?.finish()
                 }
             }
 
             override fun zoomOut() {
                 if (layoutManager.spanCount < 10) {
-                    config.dirColumnCnt = ++layoutManager.spanCount
+                    increaseColumnCount()
                     DirectoryAdapter.actMode?.finish()
                 }
             }
         }
     }
 
+    private fun increaseColumnCount() {
+        config.dirColumnCnt = ++(directories_grid.layoutManager as GridLayoutManager).spanCount
+        invalidateOptionsMenu()
+    }
+
+    private fun reduceColumnCount() {
+        config.dirColumnCnt = --(directories_grid.layoutManager as GridLayoutManager).spanCount
+        invalidateOptionsMenu()
+    }
+
     private fun isPickImageIntent(intent: Intent) = isPickIntent(intent) && (hasImageContentData(intent) || isImageType(intent))
 
     private fun isPickVideoIntent(intent: Intent) = isPickIntent(intent) && (hasVideoContentData(intent) || isVideoType(intent))

app/src/main/res/menu/menu_main.xml

@@ -15,6 +15,14 @@
         android:id="@+id/show_all"
         android:title="@string/show_all"
         app:showAsAction="never"/>
+    <item
+        android:id="@+id/increase_column_count"
+        android:title="@string/increase_column_count"
+        app:showAsAction="never"/>
+    <item
+        android:id="@+id/reduce_column_count"
+        android:title="@string/reduce_column_count"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/settings"
         android:title="@string/settings"

app/src/main/res/values-de/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Größe ändern</string>

app/src/main/res/values-es/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Resize</string>

app/src/main/res/values-fr/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Redimensionner</string>

app/src/main/res/values-it/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Resize</string>

app/src/main/res/values-ja/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Resize</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Localização desconhecida</string>
     <string name="no_map_application">Não existe uma aplicação adequada</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Redimensionar</string>

app/src/main/res/values-ru/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Место съёмки не указано</string>
     <string name="no_map_application">Не найдено приложений с картами</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Изменить размер</string>

app/src/main/res/values-sk/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Neznáma poloha</string>
     <string name="no_map_application">Nenašla sa žiadna mapová aplikácia</string>
     <string name="no_camera_app_found">Nenašla sa žiadna aplikácia pre fotoaparát</string>
+    <string name="increase_column_count">Zvýšiť počet stĺpcov</string>
+    <string name="reduce_column_count">Znížiť počet stĺpcov</string>
 
     <!-- Resizing -->
     <string name="resize">Zmeniť veľkosť</string>

app/src/main/res/values-sv/strings.xml

@@ -46,6 +46,8 @@
     <string name="filename_invalid_characters">Filnamnet innehåller ogiltiga tecken</string>
     <string name="extension">Filändelse</string>
     <string name="extension_cannot_be_empty">Filändelsen får inte vara tom</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Editor -->
     <string name="editor">Redigera</string>

app/src/main/res/values-zh-rCN/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">缩放</string>

app/src/main/res/values-zh-rTW/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">縮放</string>

app/src/main/res/values/strings.xml

@@ -23,6 +23,8 @@
     <string name="unknown_location">Unknown location</string>
     <string name="no_map_application">No application with maps has been found</string>
     <string name="no_camera_app_found">No Camera app has been found</string>
+    <string name="increase_column_count">Increase column count</string>
+    <string name="reduce_column_count">Reduce column count</string>
 
     <!-- Resizing -->
     <string name="resize">Resize</string>