public override void OnAfterPaint(NPanel panel, NPanelPaintEventArgs eventArgs)
{
NGraphics graphics = eventArgs.Graphics;
double dPreviousValue, dCurrentValue;
int nBarCount = 10;
NChart chart = panel as NChart;
NBarSeries bar = (NBarSeries)chart.Series[0];
NAxis horzAxis = chart.Axis(StandardAxis.PrimaryX);
NAxis vertAxis = chart.Axis(StandardAxis.PrimaryY);
NVector3DF vecClientPoint = new NVector3DF();
NVector3DF vecModelPoint = new NVector3DF();
int nBarSize = (int)(chart.ContentArea.Width * (int)bar.WidthPercent) / (nBarCount * 200);
// init pens and brushes
NStrokeStyle rectStrokeStyle = new NStrokeStyle(1, Color.DarkBlue);
NFillStyle rectFillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.LightBlue), Color.FromArgb(125, Color.DarkBlue));
NLightingImageFilter lightingFilter = new NLightingImageFilter();
NStrokeStyle positiveArrowStrokeStyle = new NStrokeStyle(1, Color.DarkGreen);
NFillStyle positiveArrowFillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.Green, Color.DarkGreen);
positiveArrowFillStyle.ImageFiltersStyle.Filters.Add(lightingFilter);
NStrokeStyle equalSignStrokeStyle = new NStrokeStyle(1, Color.DarkGray);
NFillStyle equalSignFillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.Gray, Color.DarkGray);
positiveArrowFillStyle.ImageFiltersStyle.Filters.Add(lightingFilter);
NStrokeStyle negativeArrowStrokeStyle = new NStrokeStyle(1, Color.DarkRed);
NFillStyle negativeArrowFillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.Red, Color.DarkRed);
positiveArrowFillStyle.ImageFiltersStyle.Filters.Add(lightingFilter);
for (int i = 1; i < bar.Values.Count; i++)
{
dPreviousValue = (double)bar.Values[i - 1];
dCurrentValue = (double)bar.Values[i];
vecModelPoint.X = horzAxis.TransformScaleToModel(false, i);
vecModelPoint.Y = vertAxis.TransformScaleToModel(false, (float)(double)bar.Values[i]);
vecModelPoint.Z = 0;
if (!chart.TransformModelToClient(vecModelPoint, ref vecClientPoint))
{
continue;
}
RectangleF rcArrowRect = new RectangleF(vecClientPoint.X - nBarSize, vecClientPoint.Y - nBarSize, 2 * nBarSize, 2 * nBarSize);
if (rcArrowRect.Width <= 0 || rcArrowRect.Height <= 0)
{
continue;
}
if (!DisplayMark(dCurrentValue, dPreviousValue))
{
continue;
}
// draw arrow background
GraphicsPath path = GetRoundRectanglePath(rcArrowRect);
graphics.PaintPath(rectFillStyle, rectStrokeStyle, path);
path.Dispose();
rcArrowRect.Inflate(-5, -5);
// draw the arrow itself
if (rcArrowRect.Width <= 0 || rcArrowRect.Height <= 0)
{
continue;
}
if (dCurrentValue < dPreviousValue)
{
// draw negative arrow
path = GetArrowPath(rcArrowRect, false);
graphics.PaintPath(negativeArrowFillStyle, negativeArrowStrokeStyle, path);
path.Dispose();
}
else if (dCurrentValue > dPreviousValue)
{
// draw positive arrow
path = GetArrowPath(rcArrowRect, true);
graphics.PaintPath(positiveArrowFillStyle, positiveArrowStrokeStyle, path);
path.Dispose();
}
else
{
// draw equal sign
NRectangleF rect = new NRectangleF(rcArrowRect.Left, rcArrowRect.Top, rcArrowRect.Width, rcArrowRect.Height / 3.0f);
graphics.PaintRectangle(equalSignFillStyle, equalSignStrokeStyle, rect);
rect = new NRectangleF(rcArrowRect.Left, rcArrowRect.Bottom - rect.Height, rcArrowRect.Width, rect.Height);
graphics.PaintRectangle(equalSignFillStyle, equalSignStrokeStyle, rect);
}
}
}
public override void OnAfterPaint(NPanel panel, NPanelPaintEventArgs eventArgs)
{
Graphics graphics = eventArgs.Graphics.DeviceGraphics;
double dPreviousValue, dCurrentValue;
int nBarCount = 10;
NChart chart = panel as NChart;
NBarSeries bar = (NBarSeries)chart.Series[0];
NAxis horzAxis = chart.Axis(StandardAxis.PrimaryX);
NAxis vertAxis = chart.Axis(StandardAxis.PrimaryY);
NVector3DF vecClientPoint = new NVector3DF();
NVector3DF vecModelPoint = new NVector3DF();
int nBarSize = (int)(chart.ContentArea.Width * (int)bar.WidthPercent) / (nBarCount * 200);
// init pens and brushes
Pen penRectBorder = new Pen(Color.DarkBlue);
SolidBrush brushRectFill = new SolidBrush(Color.FromArgb(125, Color.LightBlue));
Pen penPositiveArrowBorder = new Pen(Color.DarkGreen);
SolidBrush brushPositiveArrowFill = new SolidBrush(Color.Green);
Pen penEqualSignBorder = new Pen(Color.DarkGray);
SolidBrush brushEqualSignFill = new SolidBrush(Color.Gray);
Pen penNegativeArrowBorder = new Pen(Color.DarkRed);
SolidBrush brushNegativeArrowFill = new SolidBrush(Color.Red);
for (int i = 1; i < bar.Values.Count; i++)
{
dPreviousValue = (double)bar.Values[i - 1];
dCurrentValue = (double)bar.Values[i];
vecModelPoint.X = horzAxis.TransformScaleToModel(false, i);
vecModelPoint.Y = vertAxis.TransformScaleToModel(false, (float)(double)bar.Values[i]);
vecModelPoint.Z = 0;
if (!chart.TransformModelToClient(vecModelPoint, ref vecClientPoint))
{
continue;
}
RectangleF rcArrowRect = new RectangleF(vecClientPoint.X - nBarSize, vecClientPoint.Y - nBarSize, 2 * nBarSize, 2 * nBarSize);
if (rcArrowRect.Width <= 0 || rcArrowRect.Height <= 0)
{
continue;
}
if (!DisplayMark(dCurrentValue, dPreviousValue))
{
continue;
}
// draw arrow background
GraphicsPath path = GetRoundRectanglePath(rcArrowRect);
graphics.FillPath(brushRectFill, path);
graphics.DrawPath(penRectBorder, path);
path.Dispose();
rcArrowRect.Inflate(-5, -5);
// draw the arrow itself
if (rcArrowRect.Width <= 0 || rcArrowRect.Height <= 0)
{
continue;
}
if (dCurrentValue < dPreviousValue)
{
// draw negative arrow
path = GetArrowPath(rcArrowRect, false);
graphics.FillPath(brushNegativeArrowFill, path);
graphics.DrawPath(penNegativeArrowBorder, path);
path.Dispose();
}
else if (dCurrentValue > dPreviousValue)
{
// draw positive arrow
path = GetArrowPath(rcArrowRect, true);
graphics.FillPath(brushPositiveArrowFill, path);
graphics.DrawPath(penPositiveArrowBorder, path);
path.Dispose();
}
else
{
// draw equal sign
RectangleF rect = new RectangleF(rcArrowRect.Left, rcArrowRect.Top, rcArrowRect.Width, rcArrowRect.Height / 3.0f);
graphics.FillRectangle(brushEqualSignFill, rect.Left, rect.Top, rect.Width, rect.Height);
graphics.DrawRectangle(penEqualSignBorder, rect.Left, rect.Top, rect.Width, rect.Height);
rect = new RectangleF(rcArrowRect.Left, rcArrowRect.Bottom - rect.Height, rcArrowRect.Width, rect.Height);
graphics.FillRectangle(brushEqualSignFill, rect.Left, rect.Top, rect.Width, rect.Height);
graphics.DrawRectangle(penEqualSignBorder, rect.Left, rect.Top, rect.Width, rect.Height);
}
}
// dispose pens and brushes
penPositiveArrowBorder.Dispose();
brushPositiveArrowFill.Dispose();
penNegativeArrowBorder.Dispose();
brushNegativeArrowFill.Dispose();
brushRectFill.Dispose();
penRectBorder.Dispose();
}