Merge pull request #400 from vallemar/master

feat(BottomSheet): (Android only) allows to interact with the screen behind the sheet

Author: farfromrefug

src/bottomsheet/bottomsheet-common.ts

@@ -43,6 +43,7 @@ export interface BottomSheetOptions {
     peekHeight?: number; // optional parameter to set the collapsed sheet height. To work on iOS you need to set trackingScrollView.
     ignoreKeyboardHeight?: boolean; //(iOS only) A Boolean value that controls whether the height of the keyboard should affect the bottom sheet's frame when the keyboard shows on the screen. (Default: true)
     onChangeState?: onChangeStateBottomSheet; // One works to be called on the scroll of the sheet. Parameters: state (CLOSED, DRAGGING, DRAGGING, COLLAPSED) and slideOffset is the new offset of this bottom sheet within [-1,1] range. Offset increases as this bottom sheet is moving upward. From 0 to 1 the sheet is between collapsed and expanded states and from -1 to 0 it is between hidden and collapsed states.
+    canTouchBehind?: boolean //(Android only) allows to interact with the screen behind the sheet. For it to work properly need dismissOnBackgroundTap set to true
 }
 
 export abstract class ViewWithBottomSheetBase extends View {

src/bottomsheet/bottomsheet.android.ts

@@ -196,6 +196,16 @@ export class ViewWithBottomSheet extends ViewWithBottomSheetBase {
                     owner.callLoaded();
                 }
 
+                if(bottomSheetOptions.options.canTouchBehind){
+                    const coordinator = view.getParent();
+                    coordinator.findViewById(getId("touch_outside")).setOnTouchListener(new android.view.View.OnTouchListener({
+                        onTouch: function (view, event) {
+                          fragment.getActivity().dispatchTouchEvent(event);
+                          return false;
+                        }
+                    }));
+                }
+                
                 bottomSheetOptions.shownCallback();
             },