protected override void OnRenderCore(DrawingContext dc, RenderState state) { if (DataSource == null) { return; } if (Marker == null) { return; } var transform = Plotter2D.Viewport.Transform; DataRect bounds = DataRect.Empty; using (IPointEnumerator enumerator = DataSource.GetEnumerator(GetContext())) { Point point = new Point(); while (enumerator.MoveNext()) { enumerator.GetCurrent(ref point); enumerator.ApplyMappings(Marker); //Point screenPoint = point.Transform(state.Visible, state.Output); Point screenPoint = point.DataToScreen(transform); bounds = DataRect.Union(bounds, point); Marker.Render(dc, screenPoint); } } Viewport2D.SetContentBounds(this, bounds); }
protected override void OnRenderCore(DrawingContext dc, RenderState state) { if (DataSource == null) { return; } if (Marker == null) { return; } if (Marker.markers == null) { return; } var transform = Plotter2D.Viewport.Transform; DataRect bounds = DataRect.Empty; IEnumerable <Point> ps = GetPoints();//实际值 List <Point> buf = new List <Point>(ps); if (buf.Count < 1) { return; } double xstart = buf[0].X; foreach (MarkersPoint mp in Marker.markers) { try { int idx = (int)((mp.x - xstart) / Step.len); Point screenPoint = buf[idx].DataToScreen(transform); bounds = DataRect.Union(bounds, buf[idx]); Marker.Render(dc, screenPoint, mp);//画标记 } catch (Exception ex) { return; } } Viewport2D.SetContentBounds(this, bounds); return; using (IPointEnumerator enumerator = DataSource.GetEnumerator(GetContext())) { Point point = new Point(); int i = 0; while (enumerator.MoveNext()) { enumerator.GetCurrent(ref point); if (!Marker.markers.Contains(new MarkersPoint { x = (float)point.X })) { continue; } enumerator.ApplyMappings(Marker); i++; MarkersPoint mp = Marker.markers[i - 1]; //Point screenPoint = point.Transform(state.Visible, state.Output); Point screenPoint = point.DataToScreen(transform); bounds = DataRect.Union(bounds, point); Marker.Render(dc, screenPoint, mp); //画标记 } } Viewport2D.SetContentBounds(this, bounds); }
protected override void OnRenderCore(DrawingContext dc, RenderState state) { if (Marker == null) { return; } if (DataSource == null) // No data is specified { if (canvas != null) { foreach (UIElement child in canvas.Children) { unused.Add(child); } canvas.Children.Clear(); } } else // There is some data { int index = 0; var transform = GetTransform(); using (IPointEnumerator enumerator = DataSource.GetEnumerator(GetContext())) { Point point = new Point(); DataRect bounds = DataRect.Empty; while (enumerator.MoveNext()) { enumerator.GetCurrent(ref point); enumerator.ApplyMappings(Marker); if (index >= canvas.Children.Count) { UIElement newMarker; if (unused.Count > 0) { newMarker = unused[unused.Count - 1]; unused.RemoveAt(unused.Count - 1); } else { newMarker = Marker.CreateMarker(); } canvas.Children.Add(newMarker); } Marker.SetMarkerProperties(canvas.Children[index]); bounds.Union(point); Point screenPoint = point.DataToScreen(transform); Marker.SetPosition(canvas.Children[index], screenPoint); index++; } Viewport2D.SetContentBounds(this, bounds); while (index < canvas.Children.Count) { unused.Add(canvas.Children[index]); canvas.Children.RemoveAt(index); } } } }
private 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) { var visual = plotter.VisualBindings[item]; if (visual.Visibility == Visibility.Visible) { DataRect contentBounds = (DataRect)visual.GetValue(Viewport2D.ContentBoundsProperty); bounds.UnionFinite(contentBounds); } } DataRect viewportBounds = bounds; ContentBounds = 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; }
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 放大 if (!bounds.IsEmpty) { if ((MaxWidth > 0 && bounds.Width > MaxWidth))//设置了最大宽度 { //bounds.XMin = 0 ; bounds.Width = MaxWidth; bounds.Height = (MaxHeight >= 0 && bounds.Height > MaxHeight) ? MaxHeight : bounds.Height; bounds = bounds.DataToViewport(transform); } //else 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); }