![]() The categories are digits, unary operators ( Sqrt, x², 1/x), additive operators ( +, -), and multiplicative operators ( ×, ÷). For these, we connect multiple buttons to the same slot (e.g., digitClicked()). For example, all the digit buttons (labeled 0 to 9) append a digit to the current operand. QObject::eventFilter() is reimplemented to handle mouse events on the calculator's display.īuttons are grouped in categories according to their behavior. It inherits from QDialog and has several private slots associated with the calculator's buttons. The Calculator class provides a simple calculator widget.
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