/// <summary>
/// Refresh the scrolling list's content for both list.
///
/// This function will query from the Tango API for the Tango space Area Description. Also, when it populates
/// the scrolling list content, it will connect the delegate for each button in the list. The delegate is
/// responsible for the actual import/export through the Tango API.
/// </summary>
private void _PopulateList()
{
foreach (Transform t in m_listContentParent.transform)
{
Destroy(t.gameObject);
}
// Update Tango space Area Description list.
AreaDescription[] areaDescriptionList = AreaDescription.GetList();
if (areaDescriptionList == null)
{
return;
}
foreach (AreaDescription areaDescription in areaDescriptionList)
{
GameObject newElement = Instantiate(m_listElement) as GameObject;
AreaDescriptionListElement listElement = newElement.GetComponent <AreaDescriptionListElement>();
listElement.m_toggle.group = m_toggleGroup;
listElement.m_areaDescriptionName.text = areaDescription.GetMetadata().m_name;
listElement.m_areaDescriptionUUID.text = areaDescription.m_uuid;
// Ensure the lambda makes a copy of areaDescription.
AreaDescription lambdaParam = areaDescription;
listElement.m_toggle.onValueChanged.AddListener((value) => _OnToggleChanged(lambdaParam, value));
newElement.transform.SetParent(m_listContentParent.transform, false);
}
}
/// <summary>
/// Refresh the UI list of Area Descriptions.
/// </summary>
public void RefreshAreaDescriptionList()
{
AreaDescription[] areaDescriptions = AreaDescription.GetList();
_SelectAreaDescription(null);
// Always remove all old children.
foreach (Transform child in m_listParent)
{
Destroy(child.gameObject);
}
if (areaDescriptions != null)
{
// Add new children
ToggleGroup toggleGroup = GetComponent <ToggleGroup>();
foreach (AreaDescription areaDescription in areaDescriptions)
{
AreaDescriptionListElement button = GameObject.Instantiate(m_listElement) as AreaDescriptionListElement;
button.m_areaDescriptionName.text = areaDescription.GetMetadata().m_name;
button.m_areaDescriptionUUID.text = areaDescription.m_uuid;
button.m_toggle.group = toggleGroup;
// Ensure the lambda gets a copy of the reference to areaDescription in its current state.
// (See https://resnikb.wordpress.com/2009/06/17/c-lambda-and-foreach-variable/)
AreaDescription lambdaParam = areaDescription;
button.m_toggle.onValueChanged.AddListener((value) => _OnAreaDescriptionToggleChanged(lambdaParam, value));
button.transform.SetParent(m_listParent, false);
}
m_listEmptyText.gameObject.SetActive(false);
}
else
{
m_listEmptyText.gameObject.SetActive(true);
}
}
