/// <summary> /// Determines whether one DataRect is close to another DataRect. /// </summary> /// <param name="rect1">The rect1.</param> /// <param name="rect2">The rect2.</param> /// <param name="difference">The difference.</param> /// <returns> /// <c>true</c> if [is close to] [the specified rect1]; otherwise, <c>false</c>. /// </returns> public static bool IsCloseTo(this DataRect rect1, DataRect rect2, double difference) { DataRect intersection = DataRect.Intersect(rect1, rect2); double square1 = rect1.GetSquare(); double square2 = rect2.GetSquare(); double intersectionSquare = intersection.GetSquare(); bool areClose = MathHelper.AreClose(square1, intersectionSquare, difference) && MathHelper.AreClose(square2, intersectionSquare, difference); return(areClose); }
protected virtual DataRect CoerceVisible(DataRect newVisible) { if (Plotter == null) { return(newVisible); } bool isDefaultValue = newVisible == (DataRect)VisibleProperty.DefaultMetadata.DefaultValue; if (isDefaultValue) { newVisible = DataRect.Empty; } if (isDefaultValue && IsFittedToView) { // determining content bounds DataRect bounds = DataRect.Empty; foreach (var item in contentBoundsHosts) { IPlotterElement plotterElement = item as IPlotterElement; if (plotterElement == null) { continue; } if (plotterElement.Plotter == null) { continue; } var plotter = (Plotter2D)plotterElement.Plotter; var visual = plotter.VisualBindings[plotterElement]; if (visual.Visibility == Visibility.Visible) { DataRect contentBounds = Viewport2D.GetContentBounds(item); if (contentBounds.Width.IsNaN() || contentBounds.Height.IsNaN()) { continue; } bounds.UnionFinite(contentBounds); } } if (useApproximateContentBoundsComparison) { var intersection = prevContentBounds; intersection.Intersect(bounds); double currSquare = bounds.GetSquare(); double prevSquare = prevContentBounds.GetSquare(); double intersectionSquare = intersection.GetSquare(); double squareTopLimit = 1 + maxContentBoundsComparisonMistake; double squareBottomLimit = 1 - maxContentBoundsComparisonMistake; if (intersectionSquare != 0) { double currRatio = currSquare / intersectionSquare; double prevRatio = prevSquare / intersectionSquare; if (squareBottomLimit < currRatio && currRatio < squareTopLimit && squareBottomLimit < prevRatio && prevRatio < squareTopLimit) { bounds = prevContentBounds; } } } prevContentBounds = bounds; UnitedContentBounds = bounds; // applying fit-to-view restrictions bounds = fitToViewRestrictions.Apply(Visible, bounds, this); // enlarging if (!bounds.IsEmpty) { bounds = CoordinateUtilities.RectZoom(bounds, bounds.GetCenter(), clipToBoundsEnlargeFactor); } else { bounds = (DataRect)VisibleProperty.DefaultMetadata.DefaultValue; } newVisible.Union(bounds); } if (newVisible.IsEmpty) { newVisible = (DataRect)VisibleProperty.DefaultMetadata.DefaultValue; } else if (newVisible.Width == 0 || newVisible.Height == 0) { DataRect defRect = (DataRect)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 DataRect(loc, size); } // apply domain restriction newVisible = domainRestriction.Apply(Visible, newVisible, this); // apply other restrictions newVisible = restrictions.Apply(Visible, newVisible, this); // applying transform's data domain restriction if (!transform.DataTransform.DataDomain.IsEmpty) { var newDataRect = newVisible.ViewportToData(transform); newDataRect = DataRect.Intersect(newDataRect, transform.DataTransform.DataDomain); newVisible = newDataRect.DataToViewport(transform); } if (newVisible.IsEmpty) { newVisible = new Rect(0, 0, 1, 1); } return(newVisible); }