adding a Draw bottom action at the editor

app/src/main/kotlin/com/simplemobiletools/gallery/pro/activities/EditActivity.kt

@@ -63,6 +63,7 @@ class EditActivity : SimpleActivity(), CropImageView.OnCropImageCompleteListener
     private val PRIMARY_ACTION_NONE = 0
     private val PRIMARY_ACTION_FILTER = 1
     private val PRIMARY_ACTION_CROP_ROTATE = 2
+    private val PRIMARY_ACTION_DRAW = 3
 
     private val CROP_ROTATE_NONE = 0
     private val CROP_ROTATE_ASPECT_RATIO = 1
@@ -208,6 +209,7 @@ class EditActivity : SimpleActivity(), CropImageView.OnCropImageCompleteListener
 
                         if (isCropIntent) {
                             bottom_primary_filter.beGone()
+                            bottom_primary_draw.beGone()
                         }
 
                         return false
@@ -287,6 +289,10 @@ class EditActivity : SimpleActivity(), CropImageView.OnCropImageCompleteListener
         bottom_primary_crop_rotate.setOnClickListener {
             bottomCropRotateClicked()
         }
+
+        bottom_primary_draw.setOnClickListener {
+            bottomDrawClicked()
+        }
     }
 
     private fun bottomFilterClicked() {
@@ -307,6 +313,15 @@ class EditActivity : SimpleActivity(), CropImageView.OnCropImageCompleteListener
         updatePrimaryActionButtons()
     }
 
+    private fun bottomDrawClicked() {
+        currPrimaryAction = if (currPrimaryAction == PRIMARY_ACTION_DRAW) {
+            PRIMARY_ACTION_NONE
+        } else {
+            PRIMARY_ACTION_DRAW
+        }
+        updatePrimaryActionButtons()
+    }
+
     private fun setupCropRotateActionButtons() {
         bottom_rotate.setOnClickListener {
             crop_image_view.rotateImage(90)
@@ -375,13 +390,14 @@ class EditActivity : SimpleActivity(), CropImageView.OnCropImageCompleteListener
             loadDefaultImageView()
         }
 
-        arrayOf(bottom_primary_filter, bottom_primary_crop_rotate).forEach {
+        arrayOf(bottom_primary_filter, bottom_primary_crop_rotate, bottom_primary_draw).forEach {
             it.applyColorFilter(Color.WHITE)
         }
 
         val currentPrimaryActionButton = when (currPrimaryAction) {
             PRIMARY_ACTION_FILTER -> bottom_primary_filter
             PRIMARY_ACTION_CROP_ROTATE -> bottom_primary_crop_rotate
+            PRIMARY_ACTION_DRAW -> bottom_primary_draw
             else -> null
         }
 

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

@@ -16,7 +16,6 @@
         android:src="@drawable/ic_photo_filter"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/bottom_primary_crop_rotate"
-        app:layout_constraintHorizontal_bias="0.5"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"/>
 
@@ -28,9 +27,20 @@
         android:padding="@dimen/normal_margin"
         android:src="@drawable/ic_crop_rotate"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintEnd_toStartOf="@+id/bottom_primary_draw"
         app:layout_constraintStart_toEndOf="@+id/bottom_primary_filter"
         app:layout_constraintTop_toTopOf="parent"/>
 
+    <ImageView
+        android:id="@+id/bottom_primary_draw"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:padding="@dimen/normal_margin"
+        android:src="@drawable/ic_draw"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/bottom_primary_crop_rotate"
+        app:layout_constraintTop_toTopOf="parent"/>
+
 </androidx.constraintlayout.widget.ConstraintLayout>