Introduction

PanAndZoom is an Avalonia repository with two complementary libraries:

PanAndZoom: the ZoomBorder control, matrix helpers, commands, bounds logic, and view-state APIs for pan-and-zoom experiences.
HeadlessTestingFramework: input simulation, tree inspection, recording, and Appium-style helpers for validating Avalonia controls in automated tests.

Together they cover both sides of interactive UI work:

build zoomable, pannable canvases, diagram surfaces, and image viewers
persist view state, expose keyboard shortcuts, and constrain viewport behavior
test touch, wheel, keyboard, and gesture scenarios without a full desktop session
capture frames or turn headless recordings into video artifacts for diagnostics

Start With

Getting Started Overview if you need a package-level entry point
Quickstart: ZoomBorder to wire the control into an Avalonia view
Quickstart: Headless Testing to drive gestures in AvaloniaFact tests
API Documentation for member-level lookup

Repository Layout

src/PanAndZoom: shipping control package
src/HeadlessTestingFramework: shipping testing package
samples/AvaloniaDemo.Base and samples/AvaloniaDemo.Desktop: interactive sample app
tests/Avalonia.Controls.PanAndZoom.UnitTests: broad control and testing coverage
tests/HeadlessTestingFramework.UnitTests: focused framework-level tests