[Lazarus] TAChart Date Axis Remove Weekends

[Werner Pamler]

I don't know, at the moment, where the minimum is forced to 0 - normally 
this does not happen, it is probably a bug with the multi-value series 
which I don't use that much, I don't know...

Until this is fixed you have to determine the minimum of the y axis on 
your own. Declare a variable "mn: Double", set it to a very large value 
before you begin reading data ("mn := 1E308"), and then, each time after 
adding a value to the series, compare the currently added Low-value (it 
should be the smallest one of this record) with the current mn value and 
update it: "if lLow < mn then mn := lLow".

At the end, use the Chart's Extent property to force the yMin to the 
final result obtained for mn: "Chart1.Extent.YMin := mn". And this 
setting has to be activated by setting the Extent's UseYMin to true: 
"Chart1.Extent.UseYMin := true".