/// <summary>
/// Called when the visibility of the view has changed.
/// </summary>
protected virtual void VisibilityChanged()
{
if (AlphaProperty.IsUndefined(this, UIViewTemplates.Default) &&
IsVisibleProperty.IsUndefined(this, UIViewTemplates.Default) &&
RaycastBlockModeProperty.IsUndefined(this, UIViewTemplates.Default) &&
IsInteractableProperty.IsUndefined(this, UIViewTemplates.Default))
{
return;
}
// to change alpha, visibility and raycast we need a canvas group attached
if (CanvasGroup == null)
{
var canvasGroup = GameObject.GetComponent <CanvasGroup>();
CanvasGroup = canvasGroup == null?GameObject.AddComponent <CanvasGroup>() : canvasGroup;
}
// set alpha value
var alpha = AlphaProperty.IsUndefined(this) ? 1 : Alpha;
CanvasGroup.alpha = IsVisible ? alpha : 0;
// set raycast block mode
if (RaycastBlockMode == RaycastBlockMode.Always)
{
CanvasGroup.blocksRaycasts = true;
}
else if (RaycastBlockMode == RaycastBlockMode.Never)
{
CanvasGroup.blocksRaycasts = false;
}
else
{
CanvasGroup.blocksRaycasts = (IsVisible && alpha > 0);
}
if (IsInteractableProperty.IsUndefined(this))
{
CanvasGroup.interactable = IsVisible && alpha > 0;
}
else
{
CanvasGroup.interactable = IsInteractable;
}
}
/// <summary>
/// Returns boolean indicating if background is visible.
/// </summary>
private bool BackgroundIsVisible()
{
if (BackgroundColorProperty.IsUndefined(this))
{
return(false);
}
if (BackgroundColor.a <= 0)
{
return(false);
}
if (!AlphaProperty.IsUndefined(this) && Alpha <= 0)
{
return(false);
}
return(IsVisible);
}
/// <summary>
/// Tests if mouse is over this view.
/// </summary>
public bool ContainsMouse(Vector3 mousePosition, bool testChildren = false, bool ignoreFullScreenViews = false)
{
// get root canvas
UnityEngine.Canvas canvas = LayoutRoot.Canvas;
// alpha transparent
bool alphaTest = AlphaProperty.IsUndefined(this) ? true : Alpha > 0.99f;
// for screen space overlay the camera should be null
Camera worldCamera = canvas.renderMode == RenderMode.ScreenSpaceOverlay ? null : canvas.worldCamera;
if (RectTransformUtility.RectangleContainsScreenPoint(this.RectTransform, mousePosition, worldCamera) &&
(!ignoreFullScreenViews || !IsFullScreen) &&
GameObject.activeInHierarchy &&
alphaTest)
{
return(true);
}
if (!testChildren)
{
return(false);
}
foreach (var child in LayoutChildren)
{
UIView view = child as UIView;
if (view == null)
{
continue;
}
if (view.ContainsMouse(mousePosition, true, ignoreFullScreenViews))
{
return(true);
}
}
return(false);
}
set => SetValue(AlphaProperty, value);
