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增加Serie的avoidLabelOverlap参数避免饼图标签堆叠的情况#56

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monitor1394
2020-06-16 09:33:34 +08:00
parent d3dc17907d
commit dc6583ec0d
8 changed files with 198 additions and 103 deletions
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129
Runtime/Internal/Helper/SerieLabelHelper.cs
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@@ -175,5 +175,134 @@ namespace XCharts
}
}
}
public static void UpdatePieLabelPosition(Serie serie, SerieData serieData)
{
if (serieData.labelObject == null) return;
var currAngle = serieData.runtimePieHalfAngle;
var currRad = currAngle * Mathf.Deg2Rad;
var offsetRadius = serieData.runtimePieOffsetRadius;
var insideRadius = serieData.runtimePieInsideRadius;
var outsideRadius = serieData.runtimePieOutsideRadius;
var serieLabel = SerieHelper.GetSerieLabel(serie, serieData);
switch (serieLabel.position)
{
case SerieLabel.Position.Center:
serieData.labelPosition = serie.runtimeCenterPos;
break;
case SerieLabel.Position.Inside:
var labelRadius = offsetRadius + insideRadius + (outsideRadius - insideRadius) / 2;
var labelCenter = new Vector2(serie.runtimeCenterPos.x + labelRadius * Mathf.Sin(currRad),
serie.runtimeCenterPos.y + labelRadius * Mathf.Cos(currRad));
serieData.labelPosition = labelCenter;
break;
case SerieLabel.Position.Outside:
if (serieLabel.lineType == SerieLabel.LineType.HorizontalLine)
{
var radius1 = serie.runtimeOutsideRadius;
var radius3 = insideRadius + (outsideRadius - insideRadius) / 2;
var currSin = Mathf.Sin(currRad);
var currCos = Mathf.Cos(currRad);
var pos0 = new Vector3(serie.runtimeCenterPos.x + radius3 * currSin, serie.runtimeCenterPos.y + radius3 * currCos);
if (currAngle > 180)
{
currSin = Mathf.Sin((360 - currAngle) * Mathf.Deg2Rad);
currCos = Mathf.Cos((360 - currAngle) * Mathf.Deg2Rad);
}
var r4 = Mathf.Sqrt(radius1 * radius1 - Mathf.Pow(currCos * radius3, 2)) - currSin * radius3;
r4 += serieLabel.lineLength1 + serieLabel.lineWidth * 4;
r4 += serieData.labelObject.label.preferredWidth / 2;
serieData.labelPosition = pos0 + (currAngle > 180 ? Vector3.left : Vector3.right) * r4;
}
else
{
labelRadius = serie.runtimeOutsideRadius + serieLabel.lineLength1;
labelCenter = new Vector2(serie.runtimeCenterPos.x + labelRadius * Mathf.Sin(currRad),
serie.runtimeCenterPos.y + labelRadius * Mathf.Cos(currRad));
float labelWidth = serieData.labelObject.label.preferredWidth;
serieData.labelPosition = labelCenter;
}
break;
}
}
internal static void AvoidLabelOverlap(Serie serie)
{
if (!serie.avoidLabelOverlap) return;
var lastCheckPos = Vector3.zero;
var data = serie.data;
var splitCount = 0;
for (int n = 0; n < data.Count; n++)
{
var serieData = data[n];
if (serieData.labelPosition.x != 0 && serieData.labelPosition.x < serie.runtimeCenterPos.x)
{
splitCount = n;
break;
}
}
if (splitCount <= 0) return;
for (int n = 0; n < splitCount; n++)
{
var serieData = data[n];
CheckSerieDataLabel(serie, serieData, false, ref lastCheckPos);
}
lastCheckPos = Vector3.zero;
for (int n = data.Count - 1; n >= splitCount; n--)
{
var serieData = data[n];
CheckSerieDataLabel(serie, serieData, true, ref lastCheckPos);
}
}
private static void CheckSerieDataLabel(Serie serie, SerieData serieData, bool isLeft, ref Vector3 lastCheckPos)
{
if (!serieData.canShowLabel)
{
serieData.SetLabelActive(false);
return;
}
if (!serieData.show) return;
var serieLabel = SerieHelper.GetSerieLabel(serie, serieData);
if (serieLabel.position != SerieLabel.Position.Outside) return;
if (lastCheckPos == Vector3.zero)
{
lastCheckPos = serieData.labelPosition;
}
else if (serieData.labelPosition.x != 0)
{
float hig = serieLabel.fontSize;
if (lastCheckPos.y - serieData.labelPosition.y < hig)
{
var labelRadius = serie.runtimeOutsideRadius + serieLabel.lineLength1;
var y1 = lastCheckPos.y - hig;
var cy = serie.runtimeCenterPos.y;
var diff = Mathf.Abs(y1 - cy);
var diffX = labelRadius * labelRadius - diff * diff;
diffX = diffX <= 0 ? 0 : diffX;
var x1 = serie.runtimeCenterPos.x + Mathf.Sqrt(diffX) * (isLeft ? -1 : 1);
serieData.labelPosition = new Vector3(x1, y1);
}
lastCheckPos = serieData.labelPosition;
serieData.labelObject.SetPosition(SerieLabelHelper.GetRealLabelPosition(serieData, serieLabel));
}
}
internal static Vector3 GetRealLabelPosition(SerieData serieData, SerieLabel label)
{
if (label.position == SerieLabel.Position.Outside && label.lineType != SerieLabel.LineType.HorizontalLine)
{
var currAngle = serieData.runtimePieHalfAngle;
var offset = label.lineLength2 + serieData.labelObject.GetLabelWidth() / 2;
if (currAngle > 180)
return serieData.labelPosition + new Vector3(-offset, 0, 0);
else
return serieData.labelPosition + new Vector3(offset, 0, 0);
}
else
{
return serieData.labelPosition;
}
}
}
}