// values[0] - Point CurrentMousePosition
// values[1] - double ChartAreaHeight
// values[2] - CandleExtremums visibleCandlesExtremums
// values[3] - double PriceChartTopMargin
// values[4] - double PriceChartBottomMargin
// values[5] - int MaxNumberOfFractionalDigitsInPrice
// values[6] - CultureInfo candleChartCulture
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (values == null || values.Length < 6 || (values[0]).GetType() != typeof(Point) || (values[1]).GetType() != typeof(double) || (values[2]).GetType() != typeof(CandleExtremums) ||
(values[3]).GetType() != typeof(double) || (values[4]).GetType() != typeof(double) || (values[5]).GetType() != typeof(int))
{
return(true);
}
Point currentMousePosition = (Point)values[0];
double ChartAreaHeight = (double)values[1];
double priceLow = ((CandleExtremums)values[2]).PriceLow;
double priceHigh = ((CandleExtremums)values[2]).PriceHigh;
double chartTopMargin = (double)values[3];
double chartBottomMargin = (double)values[4];
int maxNumberOfFractionalDigitsInPrice = (int)values[5];
CultureInfo candleChartCulture = (CultureInfo)values[6];
string decimalSeparator = candleChartCulture.NumberFormat.NumberDecimalSeparator;
char[] decimalSeparatorArray = decimalSeparator.ToCharArray();
double price = Math.Round((priceHigh - (currentMousePosition.Y - chartTopMargin) / (ChartAreaHeight - chartTopMargin - chartBottomMargin) * (priceHigh - priceLow)), maxNumberOfFractionalDigitsInPrice);
string priceNumberFormat = $"N{maxNumberOfFractionalDigitsInPrice}";
return(MyNumberFormatting.PriceToString(price, priceNumberFormat, candleChartCulture, decimalSeparator, decimalSeparatorArray));
}
//---------------------------------------------------------------------------------------------------------------------------------------
protected override void OnMouseMove(MouseEventArgs e)
{
string decimalSeparator = Culture.NumberFormat.NumberDecimalSeparator;
char[] decimalSeparatorArray = decimalSeparator.ToCharArray();
string priceNumberFormat = $"N{MaxNumberOfFractionalDigitsInPrice}";
Point mousePos = e.GetPosition(this);
//Vector uv = new Vector(mousePos.X/ RenderSize.Width, mousePos.Y / RenderSize.Height);
int cndl_i = VisibleCandlesRange.Start_i + (int)(mousePos.X / (CandleWidthAndGap.Width + CandleWidthAndGap.Gap));
ICandle cndl = CandlesSource[cndl_i];
string strO = MyNumberFormatting.PriceToString(cndl.O, priceNumberFormat, Culture, decimalSeparator, decimalSeparatorArray);
string strH = MyNumberFormatting.PriceToString(cndl.H, priceNumberFormat, Culture, decimalSeparator, decimalSeparatorArray);
string strL = MyNumberFormatting.PriceToString(cndl.L, priceNumberFormat, Culture, decimalSeparator, decimalSeparatorArray);
string strC = MyNumberFormatting.PriceToString(cndl.C, priceNumberFormat, Culture, decimalSeparator, decimalSeparatorArray);
string strV = MyNumberFormatting.VolumeToString(cndl.V, Culture, decimalSeparator, decimalSeparatorArray);
string strT = cndl.t.ToString((CandlesSource.TimeFrame < 0) ? "G" : "g", Culture);
string tooltipText = $"{strT}\nO= {strO}\nH= {strH}\nL= {strL}\nC= {strC}\nV= {strV}";
((ToolTip)ToolTip).Content = tooltipText;
}
//---------------------------------------------------------------------------------------------------------------------------------------
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));
}