Text
Container decorates the Column with rounded border, black background color and padding .
Column contains the row with the Text and 5 rows with buttons
AC
+/-
Row with Text control. Row aligment is set to "end" for its child controls (Text) to be aligned to the right
%
/
7
8
9
*
4
5
6
-
1
2
3
+
0
.
=
Expand = 1 is used for each button in the row to expand them within the row equally (in proportion 1:1:1:1)
Expand = 2 is used for "0" button and expand = 1 for "." and "=" buttons to expand them in proportion 2:1:1 within the row