/// <summary>
/// 生成Y轴标签
/// </summary>
/// <param name="label">标签值</param>
/// <param name="rotate">旋转角度</param>
/// <returns></returns>
protected TextBlock CreateYLabel(Axis.RadarAxis axis)
{
var textBlock = new TextBlock();
textBlock.Text = axis.DisplayName ?? axis.BindName;
textBlock.Foreground = new SolidColorBrush(Colors.Black);
textBlock.TextAlignment = TextAlignment.Center;
var transformgroup = new TransformGroup();
//旋转角度
var rotatetransform = new RotateTransform();
rotatetransform.Angle = axis.Rotate <= 180 && axis.Rotate > 0 ? axis.Rotate - 90 : axis.Rotate + 90;
rotatetransform.CenterX = 0.5;
rotatetransform.CenterY = 0.5;
transformgroup.Children.Add(rotatetransform);
//平移位置
var r = (rotatetransform.Angle % 360) * (Math.PI / 180);
var cos = -Math.Abs(Math.Cos(r));
var sin = r > 0 && r < Math.PI ? -Math.Abs(Math.Sin(r)) : Math.Abs(Math.Sin(r));
var translatetransform = new TranslateTransform();
translatetransform.X = cos * (textBlock.ActualWidth / 2);
translatetransform.Y = sin * (textBlock.ActualWidth / 2);
transformgroup.Children.Add(translatetransform);
var x = rotatetransform.Angle > axis.Rotate ? axis.EndPoint.X + axis.RotateCos * textBlock.ActualHeight : axis.EndPoint.X - 2; // -Math.Abs(axis.RotateCos) * textBlock.ActualWidth / 2;
var y = rotatetransform.Angle > axis.Rotate ? axis.EndPoint.Y + axis.RotateSin * textBlock.ActualHeight : axis.EndPoint.Y + 2; // -Math.Abs(axis.RotateCos) * textBlock.ActualHeight / 2;
textBlock.SetValue(Canvas.LeftProperty, x);
textBlock.SetValue(Canvas.TopProperty, y);
textBlock.RenderTransformOrigin = new Point(0.5, 0.5);
textBlock.RenderTransform = transformgroup;
return(textBlock);
}
/// <summary>
/// 以中间为点画线
/// </summary>
/// <param name="center"></param>
private void DrawLine()
{
var mappings = ItemMappings.Where <Model.ItemMapping>(p => p.DataMember == Model.ItemMapping.EnumDataMember.Y).ToArray <Model.ItemMapping>();
VerticalCount = mappings.Length;
var ynames = mappings.Select <Model.ItemMapping, string>(p => p.MemberName).ToArray <string>();
var angle = Angle;
var center = Center;
//横轴个数
var hcount = this.HorizontalCount;
//x轴每一小格的长度
var xstep = Radius / hcount;
var yaxises = new Axis.RadarAxis[VerticalCount];
var sources = DataContext as System.Collections.ICollection;
var dataDic = Common.Helper.GetMaxandNinValue(sources, ynames);
//从90度起开始画线条
//画星状线
for (var i = 0; i < yaxises.Length; i++)
{
var axis = yaxises[i] = new Axis.RadarAxis();
var mapping = mappings[i];
var path = new Path();
//path.StrokeDashArray.Add(4);
axis.AxisShap = path;
axis.BindName = mapping.MemberName;
axis.DisplayName = mapping.DisplayName;
var dic = dataDic[axis.BindName];
if (dic[0].HasValue)
{
axis.MaxValue = dic[1].Value;
axis.MinValue = Common.Helper.CheckMinValue(dic[0].Value);
}
else
{
axis.ItemCount = sources.Count;//数值个数
}
axis.Length = Radius;
axis.Rotate = i * angle;
/////设定Y标签
//if (this.YLabels != null && i < this.YLabels.Length)
//{
// axis.Label = this.YLabels[i];
//}
//计算纵轴离中心的偏移量
var offsety = axis.RotateSin * Radius;
var offsetx = axis.RotateCos * Radius;
axis.StartPoint = center;
axis.EndPoint = new Point(center.X + offsetx, center.Y + offsety);
axis.AType = Axis.AxisType.YRadar;
axis.Stroke = ForeColor;
//如果画基线
if (IsDrawBaseLine)
{
var geo = new PathGeometry();
path.Data = geo;
var fig = new PathFigure();
geo.Figures.Add(fig);
fig.StartPoint = axis.StartPoint;
fig.Segments.Add(new LineSegment()
{
Point = axis.EndPoint
});
AddChild(axis.AxisShap);
//生成Y轴标签
var label = CreateYLabel(axis);
AddChild(label);
}
this.Axises.Add(axis);
}
//如果画基线
if (IsDrawBaseLine)
{
//当线条少于5条时。无法画多边形。因为四条就是一个正方形。所以会默认用圆形。
if (IsCircle == false && VerticalCount > 4)
{
for (var i = 0; i < hcount; i++)
{
var xaxis = new Axis.RadarAxis()
{
AType = Axis.AxisType.XRadar, Stroke = ForeColor
};
var shap = new Polygon();
shap.Stroke = xaxis.Stroke;
//shap.StrokeDashArray.Add(4);
xaxis.AxisShap = shap;
this.Axises.Add(xaxis);
var step = xstep * (i + 1);
foreach (var yaxis in yaxises)
{
//纵坐标上的点偏移量
var xoffsetx = yaxis.RotateCos * step;
var xoffsety = yaxis.RotateSin * step;
var p = new Point(Center.X + xoffsetx, Center.Y + xoffsety);
shap.Points.Add(p);
}
AddChild(shap);
}
}
else
{
for (var i = 0; i < hcount; i++)
{
var xaxis = new Axis.RadarAxis()
{
AType = Axis.AxisType.XRadar, Stroke = ForeColor
};
var path = new Path();
xaxis.AxisShap = path;
//path.StrokeDashArray.Add(4);
this.Axises.Add(xaxis);
var step = xstep * (i + 1);
var cirl = new EllipseGeometry();
path.Data = cirl;
cirl.Center = Center;
cirl.RadiusX = cirl.RadiusY = step;
AddChild(xaxis.AxisShap);
}
}
}
}