ScriptReference/EventType.MouseDrag

[giscus[bot]]

ScriptReference/EventType.MouseDrag

https://docs.unity3d.com/ScriptReference/EventType.MouseDrag.html

[FreyaHolmer]

just a heads up - mouse events captured inside an EditorWindow will stop registering once the mouse leaves that window, unless you've got a control focused.
I was implementing a camera panning feature, and I needed it to still register once you dragged outside the window, so, I solved it using a passive control:

int controlId = GUIUtility.GetControlID( FocusType.Passive ); // used to track events even when outside the EditorWindow
bool holdingAlt = Event.current.modifiers.HasFlag( EventModifiers.Alt );
bool RMB = Event.current.isMouse && Event.current.button == 1;
switch( Event.current.GetTypeForControl( controlId ) ) {
	case EventType.MouseDrag: 
		if( holdingAlt && RMB ) {
			ZoomBy( Event.current.delta.y * -0.003f );
			GUIUtility.hotControl = controlId; // lock control
			Repaint();
		}
		break;
	case EventType.MouseUp:
		GUIUtility.hotControl = 0; // release control
		break;
}