RE: [flexcoders] Putting markers on chart

[Ely Greenfield]

 
 
 
Yes Sachin, that makes sense.
 
This is possible to do, with a little bit of 
extension.
 
The easiest way to do this would be by writing a custom 
lineSegmentRenderer. The line segment renderer is the component used by the line 
series to render the actual line.  It gets passed an array of 
LineSeriesItems, each of which contains all the x and y values for the point it 
represents.
 
So I'd write a custom line renderer 
that:
 
- draws the line segment itself.
- for each segment of the line:
    - check and see if it crosses your y 
threshold
    - if it does
        - figure out the x position for the crossing 
point
        - draw a vertical line from 0 to unscaledHeight 
at that x position.
 
Make sense?
 
Ely.
 


From: flexcoders@yahoogroups.com 
[mailto:[EMAIL PROTECTED] On Behalf Of Sachin 
DharmapurikarSent: Sunday, April 02, 2006 8:45 PMTo: 
flexcoders@yahoogroups.comSubject: Re: [flexcoders] Putting markers 
on chart
Hi Ely,    We wan't to put a vertical line on 
X-Axis value for which the Y-axis value exceeds a threshold. E.g. following are 
the input sets -X-Axis Values : [ 11:00, 12:00, 13:00]Y-Axis Values: 
[47,67,31]Now there should be a way to define threshold on Y-Axis. If I 
set the threshold on 50 then all values > 50 should have a vertical line 
drawn on corrosponding X-Axis value. In our example on 12:00 the vertical line 
should appear. Does that make any sense to you?Sachin
On 4/3/06, Ely 
Greenfield <[EMAIL PROTECTED]> wrote: 

  
   
   
  Sachin, can you explain a little further?  are you looking for a 
  vertical line at a particular X value? or a horizontal line at a particular y 
  value?
   
  Ely.
   
  
  
  From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Sachin 
  DharmapurikarSent: Saturday, April 01, 2006 7:23 PMTo: 
  FlexcodersSubject: [flexcoders] Putting markers on 
  chart
  
  Hi,I am developing a charting 
  application. I am simulating a live chart which is updated after finite 
  interval. X-Axis of the chart is going to have dates and Y-Axis will have 
  Numbers. I want to put a red line marker when the value of Y-axis crosses a 
  particular value. Sample image is attached. Is it possible to do this 
  using Flex line 
  charting?Thanks,Sachin
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