源码推荐：一个使用C#绘制图形引擎的Framework

this.legendFont = new Font(baseFont.FontFamily,

(baseFont.Size * 2/3), baseFont.Style | FontStyle.Bold);

g.SmoothingMode = SmoothingMode.AntiAlias;

CalculateChartDimensions();

DrawBackground();

InternalDrawChart() ;

}

private void CalculateChartDimensions() {

right = r.Width - 5;

top = 5 * baseFont.Size ;

bottom = r.Height - baseFont.Size * 2;

tickCount = chartData.YMin ;

yCount = (chartData.YMax-chartData.YMin) / chartData.YTickSize ;

hspacing = (bottom-top) / yCount;

vspacing = (right) / chartData.XAxisTitles.Length;

//Left depends on width of text - for simplicities sake assume that largest yvalue is the biggest

//Take into account the first X Axis title

float maxYTextSize = g.MeasureString(chartData.YMax.ToString(), baseFont).Width;

float firstXTitle = g.MeasureString(chartData.XAxisTitles[0], baseFont).Width;

left = (maxYTextSize > firstXTitle) ? maxYTextSize : firstXTitle ;

left = r.X + left + 5 ;

//Calculate size of legend box

float maxLegendWidth = 0 ;

float maxLegendHeight = 0 ;

//Work out size of biggest legend

foreach (ChartLine cl in chartData.Lines) {

float currentWidth = g.MeasureString(cl.Title, legendFont).Width;

float currentHeight = g.MeasureString(cl.Title, legendFont).Height;

maxLegendWidth = (maxLegendWidth > currentWidth) ? maxLegendWidth : currentWidth ;