/// <summary>
/// This is basically a constructor. Since ScriptableObjects cannot have constructors,
/// this one is called from a factory method.
/// </summary>
/// <param name="selectionTree">Tree that contains the dropdown items to show.</param>
/// <param name="windowHeight">Height of the window. If set to 0, it will be auto-adjusted.</param>
/// <param name="windowPosition">Position of the window to set.</param>
private void OnCreate(SelectionTree selectionTree, float windowHeight, Vector2 windowPosition, DropdownWindowType windowType)
{
ResetControl();
wantsMouseMove = true;
_selectionTree = selectionTree;
_selectionTree.SelectionChanged += Close;
_optimalWidth = CalculateOptimalWidth(_selectionTree.SelectionPaths);
_preventExpandingHeight = new PreventExpandingHeight(windowHeight == 0f);
_positionOnCreation = GetWindowRect(windowPosition, windowHeight);
if (windowType == DropdownWindowType.Dropdown)
{
// ShowAsDropDown usually shows the window under a button, but since we don't need to align the window to
// any button, we set buttonRect.height to 0f.
Rect buttonRect = new Rect(_positionOnCreation)
{
height = 0f
};
ShowAsDropDown(buttonRect, _positionOnCreation.size);
}
else if (windowType == DropdownWindowType.Popup)
{
position = _positionOnCreation;
ShowPopup();
}
else
{
throw new Exception("Unknown window type");
}
}
public static DropdownWindow Create(SelectionTree selectionTree, int windowHeight, Vector2 windowPosition, DropdownWindowType windowType)
{
var window = CreateInstance <DropdownWindow>();
window.OnCreate(selectionTree, windowHeight, windowPosition, windowType);
return(window);
}
