C# Unity Event -- Reading Additional Mouse Buttons

user_14532720 0
Viewed 563

I am determining KeyCode inputs by Event.current.keyCode or Event.current.button.

When Event.current.isMouse == true, Event.current.button will only return 0,1, or 2 (left, right, or middle click).

It never recognizes a Mouse3 or 4 button.

Does anyone have any info on this?

unity3d mouse button events c#
3 Answers

This might be a bug or limitation of the Event class. You can get access to these buttons using Unity's Input class. It is a bit misleading through since you do this trough GetKeyDown rather than GetMouseButtonDown.

public class ButtonTest : MonoBehaviour
{
    private void Update()
    {
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse0))
        {
            Debug.Log("Mouse 0");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse1))
        {
            Debug.Log("Mouse 1");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse2))
        {
            Debug.Log("Mouse 2");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse3))
        {
            Debug.Log("Mouse 3");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse4))
        {
            Debug.Log("Mouse 4");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse5))
        {
            Debug.Log("Mouse 5");
        }
        if (UnityEngine.Input.GetKeyDown(KeyCode.Mouse6))
        {
            Debug.Log("Mouse 6");
        }
    }
}
user_9645820

I ran into the same problem. The example code given on the Unity Scripting API implies that the other mouse buttons are accessible through Event.button however I have not been able to find a way to access them.

using UnityEngine;

public class Example : MonoBehaviour
{
    // Detect which mouse button is currently pressed
    // and print it.
    void OnGUI()
    {
        Event e = Event.current;
        if (e.button == 0 && e.isMouse)
        {
            Debug.Log("Left Click");
        }
        else if (e.button == 1)
        {
            Debug.Log("Right Click");
        }
        else if (e.button == 2)
        {
            Debug.Log("Middle Click");
        }
        else if (e.button > 2)
        {
            Debug.Log("Another button in the mouse clicked");
        }
    }
}
user_145663710

If you are checking for every possible mouse keys for key config purposes, than you can do something like this, because the mouse key codes are next to each other:

private void OnGUI()
{
 
  KeyCode key;
  for (int i = (int)KeyCode.Mouse0; i <= (int)KeyCode.Mouse6; i++)
  {
    if (Input.GetKey((KeyCode)i))
    {
       key = (KeyCode)i;
       break;
    }
  } 
  //do something with the key here
 
}

So in this way you don't have to write out 7 if statements, and will break out of the cycle if it finds the key code.

user_117665060
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