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Question by skelly1324 · Jul 06, 2016 at 07:17 AM · drag-and-drop

How does OnBeginDrag work?

I cant get OnBeginDrag to fire at all. I created a scene with nothing but a camera and a Canvas with a UI panel with the below script, and it doesn't fire when I click on it then move the mouse. public class ItemData : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler { public void OnBeginDrag(PointerEventData eventData) %|-1233518199_1|% Debug.Log("Beggining Drag"); %|1112063221_3|% }

I have no idea how this interface is supposed to work, the tutorial videos I have seen just add the interfaces to a script in the UI element and it just magically works. Does the panel need to pickup raycasts? What am I doing wrong?

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Answer by Fire_Cube · Jul 06, 2016 at 08:40 AM

You have to add the component canvas element to the object, and check the "stop raycast" toggle (not sure for the name but, something like that...)

That should do :)

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Answer by YoungDeveloper · Jul 06, 2016 at 08:50 AM

Do you have any UI component attached which can receive raycast (toggle on)? For example, an Image or Text.

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avatar image Fire_Cube · Jul 06, 2016 at 09:06 AM 0
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Yes, you just have to add the canvas group component on them, and after that, you can just use some message function, like On$$anonymous$$ouseClick, ect...

just check on the UI tutorial section. Another point, you can just use button, it's as easy ;)

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