void UpdateDragBox()
{
int ID = GUIUtility.GetControlID(hash, FocusType.Passive);
switch (Event.current.GetTypeForControl(ID))
{
case EventType.Layout:
HandleUtility.AddDefaultControl(ID);
break;
case EventType.MouseDown:
if (Event.current.button == 0 && HandleUtility.nearestControl == ID)
{
GridEditorUtility.MousePos0 = Camera.current.ScreenToViewportPoint(Event.current.mousePosition);
GridEditorUtility.MousePos0.y = 1f - GridEditorUtility.MousePos0.y;
GridEditorUtility.IsMouseDown = true;
GUIUtility.hotControl = ID;
Event.current.Use();
EditorGUIUtility.SetWantsMouseJumping(1);
}
break;
case EventType.MouseDrag:
if (Event.current.button == 0)
{
GUI.changed = true;
Event.current.Use();
}
break;
case EventType.MouseUp:
if (Event.current.button == 0)
{
GridEditorUtility.MousePosF = Camera.current.ScreenToViewportPoint(Event.current.mousePosition);
GridEditorUtility.MousePosF.y = 1f - GridEditorUtility.MousePosF.y;
GridEditorUtility.DragSelecting(target);
GridEditorUtility.IsMouseDown = false;
if (GUIUtility.hotControl == ID)
{
GUIUtility.hotControl = 0;
Event.current.Use();
EditorGUIUtility.SetWantsMouseJumping(0);
}
}
break;
case EventType.Repaint:
if (GridEditorUtility.IsMouseDown)
{
DrawDragBox();
}
break;
}
}