Omacalc

A dead-simple calculator built with Qt Quick and C++ that automatically follows the Omarchy theme and system dark/light mode.

Install

Install via the Omarchy Package Repository via the omacalc package.

Usage

The keypad covers the basics: the four arithmetic operators with the usual precedence (× and ÷ before + and −), decimals, percent, sign toggle, and backspace. The expression builds up above the display and stays visible with the result after =, so 42 × 3 + 7 reads back exactly as it was entered.

Percent follows the familiar calculator convention: with a pending + or − it takes that percentage of the running total (200 + 10 % = gives 220), while with × or ÷ — or on its own — it simply divides by 100.

Everything works from the keyboard too:

• 0-9, ., +, -, *, /, and % enter digits and operators.
• Enter or = calculates.
• Backspace deletes the last digit.
• C or Escape clears.
• S toggles the sign.
• Ctrl+C or Super+C copies the result.
• Ctrl+V or Super+V pastes a number.

Colors follow the current Omarchy theme (~/.local/state/omarchy/current/theme/colors.toml) and re-tint live when the theme changes. Text follows the desktop text size — omarchy display text size, or GNOME's text-scaling-factor.

Requirements

• Qt 6: qt6-base, qt6-declarative
• xdg-desktop-portal and a portal backend

The iA Writer Mono font is bundled under the SIL Open Font License 1.1; see fonts/OFL.txt. The font is copyright Information Architects Inc. and based on IBM Plex, copyright IBM Corp.