Scrollable XY Scatter plot question

[User (Legacy)]

Hello,

I'm trying to setup a scrollable XY scatter plot, where new data is going to 

be shown at intervals.

As a test, I tried to edit the XYChart demo sample app, by changing the 

OnXValues callback to the code below, but when the button is selected the 

first time, the chart displays all data (no scrollbar) on the second (and 

subsequent) selections the scrollbar appears.  Can you see what I'm doing 

wrong? (I'm not sure if it has to do with the fact that the

X-axis has values that are all < 1.0)

Thanks,

Chris

// OnXValues() callback method

{

int i;

ICfxAxisPtr  pAxis;

m_pChartFX->ClearData((enum CfxDataMask)(CD_VALUES | CD_XVALUES));

m_pChartFX->OpenDataEx(COD_VALUES, 1, 100);

m_pChartFX->OpenDataEx(COD_XVALUES, 1, 100);

for(i=0;i<100;i++)

{

     m_pChartFX->ValueEx[0][i] = i;

     m_pChartFX->XValueEx[0][i] = i/ 1000.0;

}

m_pChartFX->CloseData((CfxCod) (COD_VALUES));

m_pChartFX->CloseData((CfxCod) (COD_XVALUES));

pAxis = (ICfxAxisPtr)m_pChartFX->Axis->Item[AXIS_X];

pAxis->Decimals  = 3;

pAxis->STEP   = .01;

pAxis->MinorStep = .001;

m_pChartFX->RecalcScale();

pAxis->SetScrollView(0, .01);

}

[Software FX]

Try the following:

Call UpdateSizeNow right before calling SetScrollView, you may be having a 

timing problem in which by the time you reach SetScrollView the scale is 

still not appropriate.

Another thing, make sure the Scrollable property in the chart is set to 

true.

-- 

FP

Software FX