Unreal Engine 4 Scripting with C++ Cookbook

Mouse UI input handling

When using the Unreal Motion Graphics (UMG) toolkit, you will find that mouse events are very easy to handle. We can register C++ functions to run after mouse clicks or other types of interactions with the UMG components.

Usually, event registration will be via Blueprints; but in this recipe, we will outline how to write and wire-up C++ functions to UMG events.

Getting ready

Create a UMG canvas in your UE4 project. From there, we'll register event handlers for the OnClicked, OnPressed, and OnReleased events.

How to do it...

1. Right-click in your Content Browser (or click on Add New), and select User Interface | Widget Blueprint, as shown in the following screenshot. This will add an editable widget blueprint to your project.