CODEWITHSUNDEEP
c#unity-game-engine
harptom
harptom

Reputation: 49

Is there a way to drag and drop UI buttons in unity 3d?

Is there a way to drag and drop UI buttons in unity 3d?

Can I add two functions to a button? The first when it is normally clicked it does something. The second when it is clicked and held, it can be dragged and dropped somewhere else on the screen?

This is the code I have so far but it's not working on the button.

    void Update()
    {
        if (isDragged)
        {
            transform.position =  Camera.main.ScreenToWorldPoint(Input.mousePosition);
        }
    }

    public void OnMouseOver()
    {
        if (Input.GetMouseButtonDown(0))
        {
            isDragged = true;
        }

        
    }
    public void OnMouseUp()
    {
        isDragged = false;
    }

Upvotes: 2

Views: 4695

Answers (1)

Tengku Fathullah
Tengku Fathullah

Reputation: 1370

You can use unity built-in interfaces,

Use IPointerClickHandler to do something when it is clicked and implement another three interface for handling dragging which is IBeginDragHandler, IDragHandler, IEndDragHandler

public class Example : MonoBehaviour, IPointerClickHandler, IBeginDragHandler, IDragHandler, IEndDragHandler
{
    //Detect if a click occurs
    public void OnPointerClick(PointerEventData pointerEventData)
    {
        Debug.Log(name + " Game Object Clicked!");
    }

    public void OnBeginDrag(PointerEventData eventData)
    {

    }

    public void OnDrag(PointerEventData data)
    {

    }

    public void OnEndDrag(PointerEventData eventData)
    {

    }
}

References : https://docs.unity3d.com/2018.1/Documentation/ScriptReference/EventSystems.IDragHandler.html

Upvotes: 3

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