/// <summary>
/// Check all the children for a bit.
/// </summary>
internal static bool DoAnyChildrenHaveABitSet(Visual3D pe,
VisualFlags flag)
{
int count = pe.InternalVisual2DOr3DChildrenCount;
for (int i = 0; i < count; i++)
{
DependencyObject child = pe.InternalGet2DOr3DVisualChild(i);
Visual v = null;
Visual3D v3D = null;
VisualTreeUtils.AsNonNullVisual(child, out v, out v3D);
if (v != null && v.CheckFlagsAnd(flag))
{
return true;
}
else if (v3D != null && v3D.CheckFlagsAnd(flag))
{
return true;
}
}
return false;
}
// This is called from the force-inherit property changed events.
internal static void InvalidateForceInheritPropertyOnChildren(Visual3D v, DependencyProperty property)
{
int cChildren = v.InternalVisual2DOr3DChildrenCount;
for (int iChild = 0; iChild < cChildren; iChild++)
{
DependencyObject vChild = v.InternalGet2DOr3DVisualChild(iChild);
if (vChild != null)
{
UIElement element = vChild as UIElement;
UIElement3D element3D = vChild as UIElement3D;
if (element3D != null)
{
if (property == IsVisibleProperty)
{
// For Read-Only force-inherited properties, use
// a private update method.
element3D.UpdateIsVisibleCache();
}
else
{
// For Read/Write force-inherited properties, use
// the standard coersion pattern.
element3D.CoerceValue(property);
}
}
else if (element != null)
{
if (property == IsVisibleProperty)
{
// For Read-Only force-inherited properties, use
// a private update method.
element.UpdateIsVisibleCache();
}
else
{
// For Read/Write force-inherited properties, use
// the standard coersion pattern.
element.CoerceValue(property);
}
}
else
{
// We have to "walk through" non-UIElement visuals.
if (vChild is Visual)
{
UIElement.InvalidateForceInheritPropertyOnChildren((Visual)vChild, property);
}
else
{
InvalidateForceInheritPropertyOnChildren((Visual3D)vChild, property);
}
}
}
}
}
