/// <summary>
/// 使用配置的颜色属性重新绘制折线图。
/// </summary>
public void DrawChart()
{
ClearChart();
if (XAxis == null || YAxis == null || XAxis.Count() == 0 || YAxis.Count() == 0)
{
return;
}
//绘制坐标
var xCellWidth = (Width - _yAxisWidth) / XAxis.Count();
var yCellHeight = (Height - _xAxisHeight) / YAxis.Count();
DrawAxis(xCellWidth, yCellHeight);
//绘制网格线
var canvasWidth = Width - _yAxisWidth;
var canvasHeight = Height - _xAxisHeight;
DrawGrid(xCellWidth, yCellHeight, canvasWidth, canvasHeight);
//绘制点和线
if (Values == null)
{
return;
}
DrawPointAndLineAndArea(xCellWidth, yCellHeight);
}
/// <summary>
/// 绘制网格。
/// </summary>
internal void DrawGrid(double xCellWidth, double yCellHeight, double canvasWidth, double canvasHeight)
{
var path = "";
for (int i = 0; i < XAxis.Count(); i++)
{
path += $"M {xCellWidth * i},0 V {canvasHeight}";
}
for (int i = 0; i < YAxis.Count(); i++)
{
path += $"M 0,{canvasHeight - yCellHeight * i} H {canvasWidth}";
}
gridPath.Data = Geometry.Parse(path);
}
/// <summary>
/// 绘制点、线和区域
/// </summary>
internal void DrawPointAndLineAndArea(double xCellWidth, double yCellHeight)
{
ScaleTransform scale;
if (UsingAnimation)
{
scale = new ScaleTransform()
{
ScaleY = 0
}
}
;
else
{
scale = new ScaleTransform()
{
ScaleY = 1
}
};
polygon.RenderTransform = scale;
polyline.RenderTransform = scale;
polygon.Points.Add(new Point(0, Height));
var xAxis = 0.0;
for (int i = 0; i < Values.Count(); i++)
{
var value = Values[i];
var point = new Point(xAxis, (Height - _xAxisHeight - yCellHeight) * (1 - value) + yCellHeight);
polyline.Points.Add(point);
polygon.Points.Add(point);
var ellipse = new Ellipse()
{
Width = 10,
Height = 10,
Margin = new Thickness(-5, -5, 0, 0),
Fill = LineBrush,
ToolTip = ValueTips == null ? null : ValueTips.Count() > i ? ValueTips[i] : null,
};
if (UsingAnimation)
{
Canvas.SetTop(ellipse, Height - _xAxisHeight);
ellipse.BeginAnimation(Canvas.TopProperty, GetDoubleAnimation((Height - _xAxisHeight - yCellHeight) * (1 - value) + yCellHeight, 1));
}
else
{
Canvas.SetTop(ellipse, (Height - _xAxisHeight - yCellHeight) * (1 - value) + yCellHeight);
}
Canvas.SetLeft(ellipse, xAxis);
pointCanvas.Children.Add(ellipse);
xAxis += xCellWidth;
if (xAxis / xCellWidth >= XAxis.Count())
{
break;
}
}
polygon.Points.Add(new Point((xAxis - xCellWidth), Height));
scale.BeginAnimation(ScaleTransform.ScaleYProperty, GetDoubleAnimation(1, 1));
}
