//---------------------------------------------------------------------------------------------------------------------------------------
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)
{
//if (VisibleCandlesExtremums.VolumeHigh == long.MinValue) return;
double textHeight = (new FormattedText("1,23", 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_LEFT_MARGIN;
double tickLineEndX = chartPanelWidth + TICK_LINE_WIDTH;
double chartHeight = ActualHeight - ChartBottomMargin - ChartTopMargin;
if (chartHeight <= 0)
{
return;
}
double stepInVolumeUnits = VisibleCandlesExtremums.VolumeHigh * ((textHeight + GapBetweenTickLabels) / chartHeight);
double stepInVolumeUnits_HPlace = MyWpfMath.HighestDecimalPlace(stepInVolumeUnits, out _);
stepInVolumeUnits = Math.Ceiling(stepInVolumeUnits / stepInVolumeUnits_HPlace) * stepInVolumeUnits_HPlace;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
double chartHeight_candlesLHRange_Ratio = chartHeight / VisibleCandlesExtremums.VolumeHigh;
string decimalSeparator = Culture.NumberFormat.NumberDecimalSeparator;
char[] decimalSeparatorArray = decimalSeparator.ToCharArray();
void DrawVolumeTick(double volume)
{
string s = MyNumberFormatting.VolumeToLimitedLengthString(volume, Culture, decimalSeparator, decimalSeparatorArray);
FormattedText priceTickFormattedText = new FormattedText(s, Culture, FlowDirection.LeftToRight, currentTypeFace, TickLabelFontSize, TickColor, VisualTreeHelper.GetDpi(this).PixelsPerDip);
double y = ChartTopMargin + (VisibleCandlesExtremums.VolumeHigh - volume) * 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));
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
double theMostRoundVolume = MyWpfMath.HighestDecimalPlace(VisibleCandlesExtremums.VolumeHigh, out _);
DrawVolumeTick(theMostRoundVolume);
double maxVolumeThreshold = (VisibleCandlesExtremums.VolumeHigh + (ChartTopMargin - halfTextHeight) / chartHeight_candlesLHRange_Ratio);
double minVolumeThreshold = (VisibleCandlesExtremums.VolumeHigh + (ChartTopMargin - ActualHeight + halfTextHeight) / chartHeight_candlesLHRange_Ratio);
int step_i = 1;
double next_tick;
while ((next_tick = theMostRoundVolume + step_i * stepInVolumeUnits) < maxVolumeThreshold)
{
DrawVolumeTick(next_tick);
step_i++;
}
step_i = 1;
while ((next_tick = theMostRoundVolume - step_i * stepInVolumeUnits) > minVolumeThreshold)
{
DrawVolumeTick(next_tick);
step_i++;
}
}