Charting

Like I said before, graphing in .NET is much tricker than it sounds. You need to:

• Find out the largerst and smallest values in order to draw the axes
  
• Adjust your thinking from a 0,0 in the bottom left to one on the top left
  
• Plot the axes
• Cater for positive and negative values while doing this


• Plot the axis labels
• Establish what is being plotted against what
  
• Calculate the points to draw the lines/rectangles for the charts
  
• Draw the lines and graphs
  
• Where appropriate, convert the lines to splines
  
• Measure the width of the strings labelig the axis (if text or date) and rotate to fit on the axes
  
• Plot the major and minor gridlines
  
• Render the data points
  
• Render the labels
  

So far so good. I've cracked then all apart from rendering the axis labels. Here is a very rough sample or my preliminary work

Here is another sample with spaces between the bars

Here is a version with overlapping bars. Notice i've implemented transparency