[Lazarus] TAChart CandleStick Chart

[Kamen Ketev]

Thank you very much!
 
Regards,
Kamen
 




-------- Оригинално писмо --------
От:  Werner Pamler  
Относно: [Lazarus] TAChart CandleStick Chart
До: lazarus at lists.lazarus.freepascal.org
Изпратено на: Понеделник, 2014, Октомври 6 21:45:30 EEST


 >> How can I make color of the tails like body?

I uploaded a small modification today which takes care of your request: 

the color of the body border and the tails of the CandleStick series is 

determined by the property CandleStickLinePen. If you set this color to 

clDefault these lines will be painted in the color of the body. Please 

see the updated "financial" demo.



 >> How can I add HorzScrollBar or something like this and keep the 

scale of CandleStick?

In TAChart you can zoom by left-dragging a rectangle across the chart. 

And you can pan the zoomed window by dragging with the right-mouse 

button down. Or you can implement more sophisticated features by using 

the chart tools.



In addition, there is a TChartNavScrollbar which you can use to scroll 

the zoomed window across the chart range. You just have to link its 

"Chart" property to the chart which you want to control. The "Min" and 

"Max" of the scrollbar map to the data range used in the chart. To get 

day-by-day scrolling set the scrollbar's Min and Max to the 

corresponding values of the horizontal axis (Chart1.GetFullExtent.a.x 

and b.x) at run-time.



Moreover, there is also a TChartNavPanel which displays the full range 

of the data and encloses the zoomed range by a rectangle. You can drag 

this rectangle over the chart, and the zoom window will follow 

automatically. Having "MiniMap" true displays a miniature chart for 

rough orientation. Again, you have to couple it to the chart of interest 

by means of the "Chart" property. In my feeling, however, there are 

still some weaknesses of this component, maybe I can look after them in 

the next days.



BTW: Do you know the TAChart documentation 

 http://wiki.lazarus.freepascal.org/TAChart_documentation? 





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