//--------------------------------------------------------------------------------------------------------------------------------------- protected override void OnRender(DrawingContext drawingContext) { double textHeight = (new FormattedText("123", Culture, FlowDirection.LeftToRight, currentTypeFace, TickLabelFontSize, Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip)).Height; double halfTextHeight = textHeight / 2.0; double chartPanelWidth = ActualWidth - PriceAxisWidth; double tickLabelX = chartPanelWidth + TICK_LINE_WIDTH + TICK_HORIZ_MARGIN; double tickLineEndX = chartPanelWidth + TICK_LINE_WIDTH; double chartHeight = ActualHeight - ChartBottomMargin - ChartTopMargin; double stepInRubles = (VisibleCandlesExtremums.PriceHigh - VisibleCandlesExtremums.PriceLow) / chartHeight * (textHeight + GapBetweenTickLabels); double stepInRubles_HPlace = MyWpfMath.HighestDecimalPlace(stepInRubles, out int stepInRubles_HPow); stepInRubles = Math.Ceiling(stepInRubles / stepInRubles_HPlace) * stepInRubles_HPlace; MyWpfMath.HighestDecimalPlace(stepInRubles, out int stepInRublesHighestDecimalPow); string priceTickLabelNumberFormat = (stepInRubles_HPow >= 0) ? "N0" : $"N{-stepInRubles_HPow}"; string currentPriceLabelNumberFormat = $"N{MaxNumberOfFractionalDigitsInPrice}"; double chartHeight_candlesLHRange_Ratio = chartHeight / (VisibleCandlesExtremums.PriceHigh - VisibleCandlesExtremums.PriceLow); //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ string decimalSeparator = Culture.NumberFormat.NumberDecimalSeparator; char[] decimalSeparatorArray = decimalSeparator.ToCharArray(); void DrawPriceTickLabel(double price, int priceStepHighestDecimalPow) { string s = MyNumberFormatting.PriceToString(price, priceTickLabelNumberFormat, Culture, decimalSeparator, decimalSeparatorArray); FormattedText priceTickFormattedText = new FormattedText(s, Culture, FlowDirection.LeftToRight, currentTypeFace, TickLabelFontSize, TickColor, VisualTreeHelper.GetDpi(this).PixelsPerDip); double y = ChartTopMargin + (VisibleCandlesExtremums.PriceHigh - price) * chartHeight_candlesLHRange_Ratio; drawingContext.DrawText(priceTickFormattedText, new Point(tickLabelX, y - halfTextHeight)); drawingContext.DrawLine(tickPen, new Point(chartPanelWidth, y), new Point(tickLineEndX, y)); if (IsGridlinesEnabled && GridlinesPen != null) { drawingContext.DrawLine(GridlinesPen, new Point(0, y), new Point(chartPanelWidth, y)); } } void DrawCurrentPriceLabel() { string currentPriceString = MyNumberFormatting.PriceToString(CurrentPrice, currentPriceLabelNumberFormat, Culture, decimalSeparator, decimalSeparatorArray); FormattedText formattedText = new FormattedText(currentPriceString, Culture, FlowDirection.LeftToRight, currentTypeFace, TickLabelFontSize, CurrentPriceLabelForeground, VisualTreeHelper.GetDpi(this).PixelsPerDip); double formattedTextWidth = formattedText.Width; double y = ChartTopMargin + (VisibleCandlesExtremums.PriceHigh - CurrentPrice) * chartHeight_candlesLHRange_Ratio; drawingContext.DrawRectangle(CurrentPriceLabelBackground, currentPriceLabelForegroundPen, new Rect(chartPanelWidth, y - halfTextHeight, formattedTextWidth + TICK_LINE_WIDTH + 2 * TICK_HORIZ_MARGIN, textHeight + 1.0)); drawingContext.DrawLine(currentPriceLabelForegroundPen, new Point(chartPanelWidth, y), new Point(tickLineEndX, y)); drawingContext.DrawText(formattedText, new Point(tickLabelX, y - halfTextHeight)); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ double theMostRoundPrice = MyWpfMath.TheMostRoundValueInsideRange(VisibleCandlesExtremums.PriceLow, VisibleCandlesExtremums.PriceHigh); DrawPriceTickLabel(theMostRoundPrice, stepInRublesHighestDecimalPow); double maxPriceThreshold = VisibleCandlesExtremums.PriceHigh + (ChartTopMargin - halfTextHeight) / chartHeight_candlesLHRange_Ratio; double minPriceThreshold = VisibleCandlesExtremums.PriceHigh + (ChartTopMargin - ActualHeight + halfTextHeight) / chartHeight_candlesLHRange_Ratio; int step_i = 1; double next_tick; while ((next_tick = theMostRoundPrice + step_i * stepInRubles) < maxPriceThreshold) { DrawPriceTickLabel(next_tick, stepInRublesHighestDecimalPow); step_i++; } step_i = 1; while ((next_tick = theMostRoundPrice - step_i * stepInRubles) > minPriceThreshold) { DrawPriceTickLabel(next_tick, stepInRublesHighestDecimalPow); step_i++; } if (IsCurrentPriceLabelVisible && CurrentPrice >= VisibleCandlesExtremums.PriceLow && CurrentPrice <= VisibleCandlesExtremums.PriceHigh) { DrawCurrentPriceLabel(); } // Горизонтальные линии на всю ширину разделяющая и окаймляющая панели времени и даты: //drawingContext.DrawLine(pen, new Point(0, 0), new Point(RenderSize.Width, 0)); //drawingContext.DrawLine(pen, new Point(0, halfRenderSizeHeight), new Point(RenderSize.Width, halfRenderSizeHeight)); //drawingContext.DrawLine(pen, new Point(0, RenderSize.Height), new Point(RenderSize.Width, RenderSize.Height)); }
//--------------------------------------------------------------------------------------------------------------------------------------- protected override void OnRender(DrawingContext drawingContext) { Pen pen = new Pen(Brushes.Black, 1); double textHeight = (new FormattedText("123", CultureInfo.GetCultureInfo("en-us"), FlowDirection.LeftToRight, new Typeface("Verdana"), PriceTickFontSize, Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip)).Height; double halfTextHeight = textHeight / 2.0; double candlePanelWidth = ActualWidth - PriceAxisWidth; double tick_text_X = candlePanelWidth + TICK_LINE_WIDTH + TICK_LEFT_MARGIN; double tick_line_endX = candlePanelWidth + TICK_LINE_WIDTH; double chartHeight = ActualHeight - ChartBottomMargin - ChartTopMargin; double stepInRubles = (CandlesLH.Y - CandlesLH.X) / chartHeight * (textHeight + GapBetweenTickLabels); double stepInRubles_maxDigit = MyWpfMath.MaxDigit(stepInRubles); stepInRubles = Math.Ceiling(stepInRubles / stepInRubles_maxDigit) * stepInRubles_maxDigit; //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ double chartHeight_candlesLHRange_Ratio = chartHeight / (CandlesLH.Y - CandlesLH.X); void DrawPriceTick(double price) { FormattedText priceTickFormattedText = new FormattedText(price.ToString(), CultureInfo.GetCultureInfo("en-us"), FlowDirection.LeftToRight, new Typeface("Verdana"), PriceTickFontSize, Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip); double y = ChartTopMargin + (CandlesLH.Y - price) * chartHeight_candlesLHRange_Ratio; drawingContext.DrawText(priceTickFormattedText, new Point(tick_text_X, y - halfTextHeight)); drawingContext.DrawLine(pen, new Point(candlePanelWidth, y), new Point(tick_line_endX, y)); if (IsGridlinesEnabled && GridlinesPen != null) { drawingContext.DrawLine(GridlinesPen, new Point(0, y), new Point(candlePanelWidth, y)); } } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ double theMostRoundPrice = MyWpfMath.TheMostRoundValueInsideRange(CandlesLH.X, CandlesLH.Y); DrawPriceTick(theMostRoundPrice); double maxPriceThreshold = CandlesLH.Y + (ChartTopMargin - halfTextHeight) / chartHeight_candlesLHRange_Ratio; double minPriceThreshold = CandlesLH.Y + (ChartTopMargin - ActualHeight + halfTextHeight) / chartHeight_candlesLHRange_Ratio; int step_i = 1; double next_tick = theMostRoundPrice + step_i * stepInRubles; while (next_tick < maxPriceThreshold) { DrawPriceTick(next_tick); step_i++; next_tick = theMostRoundPrice + step_i * stepInRubles; } step_i = 1; next_tick = theMostRoundPrice - step_i * stepInRubles; while (next_tick > minPriceThreshold) { DrawPriceTick(next_tick); step_i++; next_tick = theMostRoundPrice - step_i * stepInRubles; } // Горизонтальные линии на всю ширину разделяющая и окаймляющая панели времени и даты: //drawingContext.DrawLine(pen, new Point(0, 0), new Point(RenderSize.Width, 0)); //drawingContext.DrawLine(pen, new Point(0, halfRenderSizeHeight), new Point(RenderSize.Width, halfRenderSizeHeight)); //drawingContext.DrawLine(pen, new Point(0, RenderSize.Height), new Point(RenderSize.Width, RenderSize.Height)); }