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Question by cod · Sep 14, 2015 at 01:43 PM · dragonsceneguimousedragleftmouseclick

Editor EventType.MouseDrag not working with left mouse

Hi all, I want to call a function in my editor script while dragging my left mouse button, but it only works when I press the middle or right button and move the mouse, while if I press the left one it starts selecting the elements in the scene.Here's a piece of the code, what am I doing wrong?

 void OnSceneGUI()
 {
         Event e = Event.current;
 
         if (e.type == EventType.MouseDrag )
         {
             Debug.Log("MouseDrag");
            
         }
 
  }

Help me please

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Answer by IgorAherne · Sep 12, 2017 at 08:44 PM

Make sure to invoke Use() on your event once you've hapily processed it

Additionally, I think this should work, after you've processed event.

 int blocking_ix = GUIUtility.GetControlID(FocusType.Passive);
 UnityEditor.HandleUtility.AddDefaultControl(blocking_ix);
 UnityEditor.GUIUtility.hotControl = blocking_ix;

or maybe even

 UnityEditor.GUIUtility.hotControl = 0;

on its own ...or just

 UnityEditor.HandleUtility.AddDefaultControl(blocking_ix)

Don't remember, have a play around

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Answer by GXMark · Jan 16 at 11:02 AM

                 if (Event.current.type == EventType.MouseDown)
                 {
                     // Override the selection in  the scene view
                     GUIUtility.hotControl = GUIUtility.GetControlID(FocusType.Passive);

                     Event.current.Use();

                     _startPos = Event.current.mousePosition;
                     
                     Debug.Log(_startPos);
                 }
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Answer by Positive7 · Sep 15, 2015 at 02:43 PM

 void OnSceneGUI()
     {
         Event e = Event.current;
         
         if (e.type == EventType.MouseDrag && e.button == 0) {
             Event.current.Use ();
             Debug.Log ("MouseDrag");
         }
     }

If you want to move the object around delete Event.current.Use ();

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avatar image cod · Sep 15, 2015 at 04:34 PM 1
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thanks for the reply, but I already tried this and it didn't work.. It seems like it starts selecting object in my scene ins$$anonymous$$d... alt text

PS: I noticed that EventType.$$anonymous$$ouseDrag works only if I press either the middle button or the right one.

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