/// <summary>
/// Function to get the Stencil ID
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static int GetStencilID(GameObject obj)
{
// Implementation is almost copied from Unity UI
var count = 0;
var transform = obj.transform;
var stopAfter = FindRootSortOverrideCanvas(transform);
if (transform == stopAfter)
{
return(count);
}
var t = transform.parent;
var components = TMP_ListPool <Mask> .Get();
while (t != null)
{
t.GetComponents <Mask>(components);
for (var i = 0; i < components.Count; ++i)
{
var mask = components[i];
if (mask != null && mask.MaskEnabled() && mask.graphic.IsActive())
{
++count;
break;
}
}
if (t == stopAfter)
{
break;
}
t = t.parent;
}
TMP_ListPool <Mask> .Release(components);
return(Mathf.Min((1 << count) - 1, 255));
}
public static Material GetMaterialForRendering(MaskableGraphic graphic, Material baseMaterial)
{
if (baseMaterial == null)
{
return(null);
}
var modifiers = TMP_ListPool <IMaterialModifier> .Get();
graphic.GetComponents(modifiers);
var result = baseMaterial;
for (int i = 0; i < modifiers.Count; i++)
{
result = modifiers[i].GetModifiedMaterial(result);
}
TMP_ListPool <IMaterialModifier> .Release(modifiers);
return(result);
}
private static Transform FindRootSortOverrideCanvas(Transform start)
{
// Implementation is copied from Unity UI
var canvasList = TMP_ListPool <Canvas> .Get();
start.GetComponentsInParent(false, canvasList);
Canvas canvas = null;
for (int i = 0; i < canvasList.Count; ++i)
{
canvas = canvasList[i];
// We found the canvas we want to use break
if (canvas.overrideSorting)
{
break;
}
}
TMP_ListPool <Canvas> .Release(canvasList);
return(canvas != null ? canvas.transform : null);
}
// Show the dropdown.
//
// Plan for dropdown scrolling to ensure dropdown is contained within screen.
//
// We assume the Canvas is the screen that the dropdown must be kept inside.
// This is always valid for screen space canvas modes.
// For world space canvases we don't know how it's used, but it could be e.g. for an in-game monitor.
// We consider it a fair constraint that the canvas must be big enough to contains dropdowns.
public void Show()
{
if (!IsActive() || !IsInteractable() || m_Dropdown != null)
{
return;
}
if (!validTemplate)
{
SetupTemplate();
if (!validTemplate)
{
return;
}
}
// Get root Canvas.
var list = TMP_ListPool <Canvas> .Get();
gameObject.GetComponentsInParent(false, list);
if (list.Count == 0)
{
return;
}
Canvas rootCanvas = list[0];
TMP_ListPool <Canvas> .Release(list);
m_Template.gameObject.SetActive(true);
// Instantiate the drop-down template
m_Dropdown = CreateDropdownList(m_Template.gameObject);
m_Dropdown.name = "Dropdown List";
m_Dropdown.SetActive(true);
// Make drop-down RectTransform have same values as original.
RectTransform dropdownRectTransform = m_Dropdown.transform as RectTransform;
dropdownRectTransform.SetParent(m_Template.transform.parent, false);
// Instantiate the drop-down list items
// Find the dropdown item and disable it.
DropdownItem itemTemplate = m_Dropdown.GetComponentInChildren <DropdownItem>();
GameObject content = itemTemplate.rectTransform.parent.gameObject;
RectTransform contentRectTransform = content.transform as RectTransform;
itemTemplate.rectTransform.gameObject.SetActive(true);
// Get the rects of the dropdown and item
Rect dropdownContentRect = contentRectTransform.rect;
Rect itemTemplateRect = itemTemplate.rectTransform.rect;
// Calculate the visual offset between the item's edges and the background's edges
Vector2 offsetMin = itemTemplateRect.min - dropdownContentRect.min + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 offsetMax = itemTemplateRect.max - dropdownContentRect.max + (Vector2)itemTemplate.rectTransform.localPosition;
Vector2 itemSize = itemTemplateRect.size;
m_Items.Clear();
Toggle prev = null;
for (int i = 0; i < options.Count; ++i)
{
OptionData data = options[i];
DropdownItem item = AddItem(data, value == i, itemTemplate, m_Items);
if (item == null)
{
continue;
}
// Automatically set up a toggle state change listener
item.toggle.isOn = value == i;
item.toggle.onValueChanged.AddListener(x => OnSelectItem(item.toggle));
// Select current option
if (item.toggle.isOn)
{
item.toggle.Select();
}
// Automatically set up explicit navigation
if (prev != null)
{
Navigation prevNav = prev.navigation;
Navigation toggleNav = item.toggle.navigation;
prevNav.mode = Navigation.Mode.Explicit;
toggleNav.mode = Navigation.Mode.Explicit;
prevNav.selectOnDown = item.toggle;
prevNav.selectOnRight = item.toggle;
toggleNav.selectOnLeft = prev;
toggleNav.selectOnUp = prev;
prev.navigation = prevNav;
item.toggle.navigation = toggleNav;
}
prev = item.toggle;
}
// Reposition all items now that all of them have been added
Vector2 sizeDelta = contentRectTransform.sizeDelta;
sizeDelta.y = itemSize.y * m_Items.Count + offsetMin.y - offsetMax.y;
contentRectTransform.sizeDelta = sizeDelta;
float extraSpace = dropdownRectTransform.rect.height - contentRectTransform.rect.height;
if (extraSpace > 0)
{
dropdownRectTransform.sizeDelta = new Vector2(dropdownRectTransform.sizeDelta.x, dropdownRectTransform.sizeDelta.y - extraSpace);
}
// Invert anchoring and position if dropdown is partially or fully outside of canvas rect.
// Typically this will have the effect of placing the dropdown above the button instead of below,
// but it works as inversion regardless of initial setup.
Vector3[] corners = new Vector3[4];
dropdownRectTransform.GetWorldCorners(corners);
RectTransform rootCanvasRectTransform = rootCanvas.transform as RectTransform;
Rect rootCanvasRect = rootCanvasRectTransform.rect;
for (int axis = 0; axis < 2; axis++)
{
bool outside = false;
for (int i = 0; i < 4; i++)
{
Vector3 corner = rootCanvasRectTransform.InverseTransformPoint(corners[i]);
if (corner[axis] < rootCanvasRect.min[axis] || corner[axis] > rootCanvasRect.max[axis])
{
outside = true;
break;
}
}
if (outside)
{
RectTransformUtility.FlipLayoutOnAxis(dropdownRectTransform, axis, false, false);
}
}
for (int i = 0; i < m_Items.Count; i++)
{
RectTransform itemRect = m_Items[i].rectTransform;
itemRect.anchorMin = new Vector2(itemRect.anchorMin.x, 0);
itemRect.anchorMax = new Vector2(itemRect.anchorMax.x, 0);
itemRect.anchoredPosition = new Vector2(itemRect.anchoredPosition.x, offsetMin.y + itemSize.y * (m_Items.Count - 1 - i) + itemSize.y * itemRect.pivot.y);
itemRect.sizeDelta = new Vector2(itemRect.sizeDelta.x, itemSize.y);
}
// Fade in the popup
AlphaFadeList(0.15f, 0f, 1f);
// Make drop-down template and item template inactive
m_Template.gameObject.SetActive(false);
itemTemplate.gameObject.SetActive(false);
m_Blocker = CreateBlocker(rootCanvas);
}
