Calculator

A compact four-function calculator built as an interactive QIP component.

Its timestamp-free key and pointer events run inside application-style updates. finish_update closes an update without rejection, and a separate render presents canonical KTX2 output.

Controls:

• Click the keys or use number keys
• +, -, *, /: choose an operation
• Enter or =: evaluate
• Backspace: delete a digit
• C: clear