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ldelabre
Joined: 12 Apr 2008
Posts: 10
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 Posted: Sun Apr 13, 2008 12:32 pm Post subject: DisplayBlanksAs not implemented |
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Hello!
I'm using charts with series containing possible "blank" values. At first, I was happy to discover a DisplayBlanksAs property...
Then I realize that this property is not yet implemented....(quick search throught the source code) ;-(
Is anyone working on this already ?
Thanks
Ludovic. |
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ldelabre
Joined: 12 Apr 2008
Posts: 10
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| Posted: Thu Apr 17, 2008 5:44 pm Post subject: |
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Since I received no answers, I assumed noboby's working on it..
So here's a first try - I know it's kindda ugly... (sorry ! :oups:) And I've not tested all modes yet ... Just wanted to shared this 
| Code: |
/// <summary>
/// Draws the content of the line plot area.
/// </summary>
internal override void Draw()
{
ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
XRect plotAreaRect = cri.plotAreaRendererInfo.Rect;
if (plotAreaRect.IsEmpty)
return;
XGraphics gfx = this.rendererParms.Graphics;
XGraphicsState state = gfx.Save();
gfx.SetClip(plotAreaRect, XCombineMode.Intersect);
//TODO null-Values müssen berücksichtigt werden.
// Verbindungspunkte können fehlen, je nachdem wie null-Values behandelt werden sollen.
// (NotPlotted, Interpolate etc.)
// Draw lines and markers for each data series.
XMatrix matrix = cri.plotAreaRendererInfo.matrix;
double xMajorTick = cri.xAxisRendererInfo.MajorTick;
foreach (SeriesRendererInfo sri in cri.seriesRendererInfos)
{
int count = sri.series.Elements.Count;
double[] values = new double[count];
double left = double.NaN;
int leftIdx = 0;
for (int idx = 0; idx < count; idx++)
{
double v = sri.series.Elements[idx].Value;
if (double.IsNaN(v))
{
switch (cri.chart.displayBlanksAs)
{
case BlankType.NotPlotted:
v = double.NaN;
break;
case BlankType.Interpolated:
double right;
int rightIdx;
right = double.NaN; rightIdx = 0;
for (int jdx = idx + 1; jdx < count; jdx++)
{
double w = sri.series.Elements[jdx].Value;
if (!double.IsNaN(w))
{
right = w;
rightIdx = jdx;
break;
}
}
if (double.IsNaN(rightIdx) || double.IsNaN(leftIdx))
v = double.NaN;
else
v = (right - left) / (rightIdx - leftIdx);
break;
case BlankType.Zero:
v = 0;
break;
default:
throw new NotImplementedException();
}
}
else
left = v;
values[idx] = v;
}
List<List<XPoint>> points;
points = new List<List<XPoint>>();
points.Add(new List<XPoint>());
for (int idx = 0; idx < count; idx++)
{
double v = sri.series.Elements[idx].Value;
if (double.IsNaN(v))
{
if (points[points.Count -1].Count > 0)
points.Add(new List<XPoint>());
}
else
points[points.Count - 1].Add(new XPoint(idx + xMajorTick / 2, v));
}
foreach (List<XPoint> lines in points)
{
if (lines.Count > 0)
{
XPoint[] pts;
pts = lines.ToArray();
matrix.TransformPoints(pts);
if (pts.Length > 2)
gfx.DrawLines(sri.LineFormat, pts);
DrawMarker(gfx, pts, sri);
}
}
}
gfx.ResetClip();
gfx.Restore(state);
}
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ldelabre
Joined: 12 Apr 2008
Posts: 10
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| Posted: Sun Jun 15, 2008 1:59 pm Post subject: |
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Oups... bug 
I do correct myself 
| Code: |
if (pts.Length > 2)
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should be
| Code: |
if (pts.Length >= 2)
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