Merge pull request #20 from HeyAlex/restrict-touchable-area

restrict touchable area depends on translationX

Author: hunterstich

Owl/app/src/main/java/com/materialstudies/owl/ui/lessons/LessonBottomSheetBehavior.kt

@@ -0,0 +1,22 @@
+package com.materialstudies.owl.ui.lessons
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import com.google.android.material.bottomsheet.BottomSheetBehavior
+
+/**
+ *  A [BottomSheetBehavior] that helps to restrict touchable area depends on translationX
+ */
+class LessonBottomSheetBehavior<T : View>(context: Context, attrs: AttributeSet?) :
+    BottomSheetBehavior<T>(context, attrs) {
+
+    override fun onTouchEvent(parent: CoordinatorLayout, child: T, event: MotionEvent): Boolean {
+        if (event.x < child.translationX) {
+            return false
+        }
+        return super.onTouchEvent(parent, child, event)
+    }
+}

Owl/app/src/main/res/layout/fragment_lessons_sheet.xml

@@ -34,7 +34,7 @@
         android:id="@+id/lessons_sheet"
         android:layout_height="match_parent"
         android:layout_width="match_parent"
-        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"
+        app:layout_behavior="com.materialstudies.owl.ui.lessons.LessonBottomSheetBehavior"
         app:behavior_peekHeight="56dp">
 
       <ImageView