private Rect CoerceVisible(Rect newVisible)
{
PerformanceCounter.startStopwatch("Coercing visible");
if (Plotter == null)
{
return(newVisible);
}
bool isDefaultValue = (newVisible == defaultRect);
if (isDefaultValue)
{
newVisible = Rect.Empty;
}
//if (isDefaultValue && IsFittedToView)
if (isDefaultValue)
{
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 = CoordinateUtilities.RectZoom(bounds, bounds.GetCenter(), clipToBoundsFactor);
}
else
{
bounds = defaultRect;
}
newVisible.Union(bounds);
}
if (newVisible.IsEmpty)
{
newVisible = defaultRect;
}
else if (newVisible.Width == 0 || newVisible.Height == 0)
{
Rect defRect = defaultRect;
Size size = new Size(newVisible.Width, newVisible.Height);
Point loc = new Point(newVisible.X, newVisible.Y);
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 = RectExt.Intersect(newDataRect, transform.DataTransform.DataDomain);
newVisible = newDataRect.DataToViewport(transform);
}
if (newVisible.IsEmpty)
{
return(new Rect(0, 0, 1, 1));
}
//RaisePropertyChangedEvent();
PerformanceCounter.stopStopwatch("Coercing visible");
return(newVisible);
}
public override void GetBounds(ref Rect outBounds, Matrix3X3 parentMatrix)
{
base.GetBounds(ref outBounds, parentMatrix);
RectExt.Set(ref outBounds, 0, 0, 0, 0);
}
public void GetClipBounds(out Rect bounds)
{
RectExt.Set(ref bounds, _currentClip.X, _currentClip.Y, _currentClip.Width, _currentClip.Height);
}
