Calculator

A popup calculator panel powered by qalc, with a text input and a session expression history. Click a history row to copy its result to the clipboard.

Plugin

field	value
id	samuelskovbakke/calculator-plus
entries	Bar widget: widget; panel: panel

Requirements

• qalc, the command-line calculator from libqalculate. Install the libqalculate (Arch), qalculate (Fedora/Debian family package names vary) package for your distro; the binary is usually just called qalc.

Usage

1. Enable the plugin: noctalia msg plugins enable samuelskovbakke/calculator-plus
2. Add the Calculator widget to a bar from Settings → Bar (or the Add-widget picker).
3. Click the bar icon to open the panel, type an expression, and press Enter to evaluate it.
4. Click any row in the history to copy that result to the clipboard.

Settings

Setting	Type	Default	Description
notify_on_copy	bool	true	Send a notification whenever an expression or result is copied to the clipboard.
repeat_delay_ms	int	400	Change repeat delay of up/down arrow for history navigation.
repeat_interval_ms	int	120	Change repeat interval of up/down arrow for history navigation.
glyph	glyph	calculator	Icon glyph name.

IPC

The panel can also be toggled directly:

noctalia msg panel-toggle samuelskovbakke/calculator-plus:panel

Notes

• Expressions are appended to a scratch file in the plugin's data directory and evaluated with qalc -t -f <path> via noctalia.runAsync using the argument-array form (no shell interpolation), so the panel does not spawn a shell. Session variables persist across evaluations by re-reading the full expression history from that file each time.
• The visible history list is kept only for the lifetime of plugin enablement and is not persisted, it can be cleared with a button or by writing clear in the input field. (The scratch file used internally to replay session variables to qalc does live in the plugin's data directory, but it holds only the raw expression text already visible in the history above, not anything separately sensitive, and is overwritten on every evaluation.)