How to create a Button with Modifiers in Unity UI (ctrl, alt, shift, shoulder button, ...)

Published: 07 April 2025
on channel: Christina Creates Games

502

This tutorial teaches you how to create a button that uses modifiers to change its behaviour. This will use the new input system. A typical use case would be an inventory or resource management system, where one click takes an item, using the shift modifier with a click takes multiple, alt modifier with a click chops the stacks in two and so on.

This system will handle:
OnClick events for no modifier, one modifier, another modifier or both at the same time
Notifier events to subscribe to, depending on which combination of modifiers you hold down

Hope you enjoy it!

📖 Chapters
00:00 Use case for a modifier button
01:00 Setup in the Unity Editor
01:58 The script handling modifier input for the UI Button
07:11 Implementing the scripts in the Editor
08:08 Setting up the new input system
09:54 Adding the button to the right click menu

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