//---------------------------------------------------------------------------------------------------------------------------------------
protected override void OnRender(DrawingContext drawingContext)
{
if (CandlesMaxVolume == long.MinValue)
{
return;
}
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 volumeHistogramPanelWidth = ActualWidth - PriceAxisWidth;
double tick_text_X = volumeHistogramPanelWidth + TICK_LINE_WIDTH + TICK_LEFT_MARGIN;
double tick_line_endX = volumeHistogramPanelWidth + TICK_LINE_WIDTH;
double chartHeight = ActualHeight - ChartBottomMargin - ChartTopMargin;
if (chartHeight <= 0)
{
return;
}
long stepInVolumeLots = (long)(CandlesMaxVolume * ((textHeight + GapBetweenTickLabels) / chartHeight)) + 1;
long stepInVolumeLots_maxDigit = MyWpfMath.MaxDigit(stepInVolumeLots);
stepInVolumeLots = (stepInVolumeLots % stepInVolumeLots_maxDigit) == 0 ? stepInVolumeLots : (stepInVolumeLots / stepInVolumeLots_maxDigit + 1) * stepInVolumeLots_maxDigit;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
double chartHeight_candlesLHRange_Ratio = chartHeight / CandlesMaxVolume;
void DrawPriceTick(long volume)
{
FormattedText priceTickFormattedText = new FormattedText(volume.ToString(), CultureInfo.GetCultureInfo("en-us"), FlowDirection.LeftToRight, new Typeface("Verdana"), PriceTickFontSize, Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip);
double y = ChartTopMargin + (CandlesMaxVolume - volume) * chartHeight_candlesLHRange_Ratio;
drawingContext.DrawText(priceTickFormattedText, new Point(tick_text_X, y - halfTextHeight));
drawingContext.DrawLine(pen, new Point(volumeHistogramPanelWidth, y), new Point(tick_line_endX, y));
if (IsGridlinesEnabled && GridlinesPen != null)
{
drawingContext.DrawLine(GridlinesPen, new Point(0, y), new Point(volumeHistogramPanelWidth, y));
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
long theMostRoundVolume = MyWpfMath.MaxDigit(CandlesMaxVolume);
DrawPriceTick(theMostRoundVolume);
long maxVolumeThreshold = (long)(CandlesMaxVolume + (ChartTopMargin - halfTextHeight) / chartHeight_candlesLHRange_Ratio);
long minVolumeThreshold = (long)(CandlesMaxVolume + (ChartTopMargin - ActualHeight + halfTextHeight) / chartHeight_candlesLHRange_Ratio);
int step_i = 1;
long next_tick = theMostRoundVolume + step_i * stepInVolumeLots;
while (next_tick < maxVolumeThreshold)
{
DrawPriceTick(next_tick);
step_i++;
next_tick = theMostRoundVolume + step_i * stepInVolumeLots;
}
step_i = 1;
next_tick = theMostRoundVolume - step_i * stepInVolumeLots;
while (next_tick > minVolumeThreshold)
{
DrawPriceTick(next_tick);
step_i++;
next_tick = theMostRoundVolume - step_i * stepInVolumeLots;
}
}
//---------------------------------------------------------------------------------------------------------------------------------------
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));
}