GraphiteEditor/Graphite

Lock axis when panning

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#2,377 opened on Mar 7, 2025

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Good First Issue

Description

While panning the canvas (with MMB+drag or Space+drag), add support for locking to the X or Y axis with the Shift modifier key held down.

If the viewport is tilted (with Alt+MMB drag or Alt+Space+LMB drag), it should remain aligned with the X and Y axes of the viewport not the tilted document.

Contributor guide

Tech stack
rust
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
RustEvent handlingCoordinate transforms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Study the existing panning implementation in the Graphite codebase, likely in the `input` or `viewport` modules. Look at how MMB and Space drag are handled, and where Shift modifier is already used for other actions. Implement Shift to lock axis, and for tilted viewport, align with viewport axes by transforming the movement direction. Test with different viewport rotations.