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zreynolds
5 Posts |
 Posted - 31 Mar 2006 : 06:56:23
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Hello, I'm sure this will be a quick fix, but it's tough to figure out.
I am using a RTScrollFrame to display some time-series data in real time. What I am trying to implement is a rescale of the time axis (x-axis) while the plot is scrolling. For example, changing from an initial 5-second view to a 10-second view.
The following is the code segment that I am using to rescale:
GregorianCalendar time = new GregorianCalendar();
pTransform[ChanNum].setTimeScaleStart(time);
time.add(ChartCalendar.SECOND, (int) range_in_secs);
pTransform[ChanNum].setTimeScaleStop(time);
scrollframe[ChanNum].rescaleAxesToCurrentTransform();
What happens is the chart resizes to the specified time parameter, but once the frame fills with data and starts to scroll, it reverts to its initial settings.
Any ideas on what I need set to make this chart behave?
Zane Reynolds
reynolds@eng.usf.edu |
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quinncurtis
1586 Posts |
Posted - 31 Mar 2006 : 10:28:31
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The RTScrollFrame controls the axes scaling, so changing the time-axis scale only changes things temporarily until the scroll frame re-asserts its control over the axis.
The scroll frame has a property, frameExtent, that is calculated in the RTScrollFrame constructor, based on the initial extent of the time axis of the coordinate system passed in. This property controls the extent of the time axis for all subsequent scrolling. Unfortunately this property is not public and can't be changed once the initial RTScrollFrame constructor is called.
We have to make an update later today, because of a bug that can prevent the time axis from being displayed when an RT chart is initially drawn. We will include get/set methods in that update to set the RTScrollFrame frameExtent property.
We will post on this thread when the update is on-line. You will be able to just re-download, and re-install the software to get the modifed libraries.
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quinncurtis
1586 Posts |
Posted - 31 Mar 2006 : 13:54:31
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We have finished uploading the new libraries. You can get them by downloading the trial version of the software here:
http://www.quinn-curtis.com/downloadsoftware/Trial_QCRTGraphJavaR16x.zip
or by using your original download links from an order.
A couple of methods were added to the RTScrollFrame class: setFrameExtent(double millseconds), which will set the frame extend in milliseconds, and setFrameExtendSeconds(double seconds) which sets the frame extent in seconds.
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zreynolds
5 Posts |
Posted - 04 Apr 2006 : 06:27:48
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Thanks for the quick response! I'll be working on incorporating those methods today.
Thanks again,
Zane Reynolds
reynolds@eng.usf.edu |
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zreynolds
5 Posts |
Posted - 04 Apr 2006 : 06:28:56
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Thanks for the quick response! I'll be incorporating those methods today.
Thanks again,
Zane Reynolds
reynolds@eng.usf.edu |
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Changing the size of a time-based x-axis
