public override void OnChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, bool isCurrentlyActive)
{
base.OnChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
View itemView = viewHolder.ItemView;
int itemHeight = itemView.Height;
Boolean isCancelled = dX == 0 && !isCurrentlyActive;
if (isCancelled)
{
clearCanvas(c, itemView.Right + dX, (float)itemView.Top, (float)itemView.Right, (float)itemView.Bottom);
base.OnChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
return;
}
mBackground.SetColorFilter(Color.Red, PorterDuff.Mode.Add);
mBackground.SetBounds(itemView.Right + (int)dX, itemView.Top, itemView.Right, itemView.Bottom);
mBackground.Draw(c);
int deleteIconTop = itemView.Top + (itemHeight - intrinsicHeight) / 2;
int deleteIconMargin = (itemHeight - intrinsicHeight) / 2;
int deleteIconLeft = itemView.Right - deleteIconMargin - intrinsicWidth;
int deleteIconRight = itemView.Right - deleteIconMargin;
int deleteIconBottom = deleteIconTop + intrinsicHeight;
deleteDrawable.SetBounds(deleteIconLeft, deleteIconTop, deleteIconRight, deleteIconBottom);
deleteDrawable.Draw(c);
base.OnChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
public static bool InsertColorFilterOnTouch(View view, MotionEventActions action)
{
switch (action)
{
case MotionEventActions.Down:
{
var colorDrawable = view.Background as ColorDrawable;
if (colorDrawable != null)
{
var drawable = new ColorDrawable(colorDrawable.Color);
drawable.SetColorFilter(new Color(0x77000000), PorterDuff.Mode.SrcAtop);
view.Background = drawable;
}
else
{
view.Background.SetColorFilter(new Color(0x77000000), PorterDuff.Mode.SrcAtop);
}
//view.Background = ((Activity)view.Context).Resources.GetDrawable(Resource.Drawable.ic_delete);
view.Invalidate();
break;
}
case MotionEventActions.Up:
case MotionEventActions.Cancel:
{
var colorDrawable = view.Background as ColorDrawable;
if (colorDrawable != null)
{
var drawable = new ColorDrawable(colorDrawable.Color);
view.Background = drawable;
}
else
{
view.Background.ClearColorFilter();
}
view.Invalidate();
break;
}
}
return(false);
}
