private static object OnCoerceVisible(DependencyObject d, object newValue)
{
Viewport2D viewport = (Viewport2D)d;
DataRect newVisible = (DataRect)newValue;
DataRect newRect = viewport.CoerceVisible(newVisible);
if (viewport.FromContentBounds && viewport.prevVisibles.ContainsValue(newRect))
{
return(DependencyProperty.UnsetValue);
}
else
{
viewport.prevVisibles.AddValue(newRect);
}
if (newRect.Width == 0 || newRect.Height == 0)
{
// doesn't apply rects with zero square
return(DependencyProperty.UnsetValue);
}
else
{
return(newRect);
}
}
private static object OnCoerceVisible(DependencyObject d, object newValue)
{
Viewport2D viewport = (Viewport2D)d;
Rect newRect = viewport.CoerceVisible((Rect)newValue);
if (newRect.Width == 0 || newRect.Height == 0)
{
// doesn't apply rects with zero square
return(DependencyProperty.UnsetValue);
}
else
{
return(newRect);
}
}