Long story short, I'm trying to create a UI panel where you hold and drag your mouse wheel button and select the option you want (while holding that button). So it is a pop-up menu that is triggered when you press the mouse wheel button. When you release the button, there are 2 possible situations:

1. You didn't move your cursor to a valid position. The pop-up menu is closed.
2. You moved your cursor to a valid position. You triggered an option from this pop-up menu.

To give you an example, the weapon switch system in, say, Tomb Raider does this similarly. It looks like a roulette, you hold the button then move your cursor to a certain location that "belongs" to, say, shotgun. Then you release the button, the menu is closed and now you are equiped with a shotgun. Right now, the pop-up panel kinda works. However it's not a hold-release mechanism but a click mechanism. You click the button once, then the menu pops up and stays there.

How do you do that in Unity3D?

Here is my script so far:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;


public class PosSelector : MonoBehaviour
{
    Animator  posSelectorAnimator;
    public GameObject posSelector;
    public Animator posButtonAnimator;

    void Start ()
    {
        posSelectorAnimator = posSelector.GetComponent<Animator>();
        
    }

    void Update ()
    {
        if (Input.GetKeyDown(KeyCode.Mouse2))
        {
            Open();
        }
        if (Input.GetKeyUp(KeyCode.Mouse2))
        {
            Close();
        }
    }

    void Open()
    {
        Vector3 mousePos = Input.mousePosition;
        Debug.Log("Middle button is pressed.");
        posSelector.transform.position = (mousePos);
        posSelectorAnimator.SetBool("ButtonDown", true);
    }

    void Close()
    {

        if (posButtonAnimator.GetCurrentAnimatorStateInfo(0).IsName("Highlighted"))
        {
            Debug.Log("Position selected.");
            Debug.Log(posButtonAnimator.GetCurrentAnimatorStateInfo(0).shortNameHash);
        }
        else
        {
            Debug.Log("Input not found.");
            Debug.Log(posButtonAnimator.GetCurrentAnimatorStateInfo(0).shortNameHash);
        }
    }
}

CodePudding user response：

First of all, what you are cresting is called a pie menu. You could create a script for the buttons inside your pie menu. Then let that script inherit from MonoBehaviour, IPointerEnterHandler and IPointerExitHandler. These interfaces force you to implement the following methods:

 public void OnPointerEnter(PointerEventData eventData)
 {
     PosSelector.selectedObject = gameObject;
 }

 public void OnPointerExit(PointerEventData eventData)
 {
     PosSelector.selectedObject = null;
 }

Now create a static field in your PosSelector script called selectedObject:

public static GameObject selectedObject;

Then in your Close() Method, you can use selectedObject as your output:

void Close()
{
    //Close your menu here using the animator

    //Return if nothing was selected
    if(selectedObject == null) 
        return;

    //Select a weapon or whatever you want to do with your output
}

Also, consider renaming your question to something like "how to create a pie menu in unity? " so that other people with the same question have an easier time finding this question