public static Rect Zoom(this Rect rect, Point to, double ratio)
{
return(CoordinateUtilities.RectZoom(rect, to, ratio));
}
private Rect CoerceVisible(Rect newVisible)
{
if (Plotter == null)
{
return(newVisible);
}
bool isDefaultValue = newVisible == (Rect)VisibleProperty.DefaultMetadata.DefaultValue;
if (isDefaultValue)
{
newVisible = Rect.Empty;
}
if (isDefaultValue && IsFittedToView)
{
Rect bounds = Rect.Empty;
foreach (var g in Plotter.Children)
{
var graph = g as DependencyObject;
if (graph != null)
{
var uiElement = g as UIElement;
if (uiElement == null || (uiElement != null && uiElement.Visibility == Visibility.Visible))
{
bounds.Union((Rect)graph.GetValue(ViewportElement2D.ContentBoundsProperty));
}
}
}
Rect viewportBounds = bounds;
if (!bounds.IsEmpty)
{
bounds = bounds.DataToViewport(transform);
}
//Rect defaultRect = (Rect)VisibleProperty.DefaultMetadata.DefaultValue;
//if (bounds.Width.IsInfinite())
// bounds.Width = defaultRect.Width;
//if (bounds.Height.IsInfinite())
// bounds.Height = defaultRect.Height;
//if (bounds.X.IsInfinite())
// bounds.X = defaultRect.X;
//if (bounds.Y.IsInfinite())
// bounds.Y = defaultRect.Y;
if (!bounds.IsEmpty)
{
bounds = CoordinateUtilities.RectZoom(bounds, bounds.GetCenter(), clipToBoundsFactor);
}
else
{
bounds = (Rect)VisibleProperty.DefaultMetadata.DefaultValue;
}
newVisible.Union(bounds);
}
if (newVisible.IsEmpty)
{
newVisible = (Rect)VisibleProperty.DefaultMetadata.DefaultValue;
}
else if (newVisible.Width == 0 || newVisible.Height == 0)
{
Rect defRect = (Rect)VisibleProperty.DefaultMetadata.DefaultValue;
Size size = newVisible.Size;
Point loc = newVisible.Location;
if (newVisible.Width == 0)
{
size.Width = defRect.Width;
loc.X -= size.Width / 2;
}
if (newVisible.Height == 0)
{
size.Height = defRect.Height;
loc.Y -= size.Height / 2;
}
newVisible = new Rect(loc, size);
}
newVisible = ApplyRestrictions(Visible, newVisible);
// applying transform's data domain restriction
if (!transform.DataTransform.DataDomain.IsEmpty)
{
var newDataRect = newVisible.ViewportToData(transform);
newDataRect = Rect.Intersect(newDataRect, transform.DataTransform.DataDomain);
newVisible = newDataRect.DataToViewport(transform);
}
if (newVisible.IsEmpty)
{
return(new Rect(0, 0, 1, 1));
}
return(newVisible);
}