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Contour plot

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Frank

5 Posts

Posted - 18 Aug 2006 : 18:40:49

Seem to have a little hassle trying to get the contour plot to redraw after the data has changed. The reconnect data seems to have worked, because the data dialog displays the new data. However, the graph displayed it the old one. I have a variety of hacks, and none seems to work. Do you have any suggestions for me?

Regards

Frank

Frank

quinncurtis

1164 Posts

Posted - 18 Aug 2006 : 20:39:52

Because of extensive preprocessing that takes place
when a contour plot is created, normally the contour
plot is not replotted in response to the WGRedrawObject
function. Doing so would make it very slow to resize a
window that had a contour plot in it.

If you modify the data in a contour plot and want it
to redraw, call the WGDeletePlotBitmap function before
you cann WGRedrawObject or WGRedrawGraph.

	WGDeletePlotBitmap(pGrDesc,hPlotFill);
        WGRedrawGraph(pGrDesc,TRUE);

Frank

5 Posts

Posted - 19 Aug 2006 : 02:23:45

Thanks for response. However WGDeletePlotBitmap return false, even right at the beginning of the OnUpdate function. Code snippet is as follows:

if (!pGraph->WGIsGraphValid ()) return;
WGStart();
HGOBJ hTPlot;
hTPlot = pGraph->GetTemp2DHandle();
a = pGraph->WGDeletePlotBitmap(hTPlot);

Any further help?

Regards

Frank

Frank

5 Posts

Posted - 19 Aug 2006 : 02:40:47

Of course, its is my OnUpdateGraph function that I meant below, not an MFC function.

Another thing, in your ContourD example, your have a line to produce the text "TEST" on screen. However, it does not display because it is below the bitmap for the contour plot. There seems t be an issue about layering in these plots.

I tried deleting the Plot Bitmap directly after creating it in buildgraph and it failed as well. I checked the PGRAPH_DEF pointer tot he graph object using GetGraphDesc and step through the MFC wrapper for QC and there was not a issue on that side.

This is an major hassle for me right now, as the user wants to see the data as she changes it.

[quote]Originally posted by Frank

Thanks for response. However WGDeletePlotBitmap return false, even right at the beginning of the OnUpdate function. Code snippet is as follows:

if (!pGraph->WGIsGraphValid ()) return;
WGStart();
HGOBJ hTPlot;
hTPlot = pGraph->GetTemp2DHandle();
a = pGraph->WGDeletePlotBitmap(hTPlot);

Any further help?

Regards

Frank

quinncurtis

1164 Posts

Posted - 19 Aug 2006 : 18:23:32

We tried to create a simple example that updated a filled contour plot but were not able, probably as a result of the same problem you are having. We will have to look into it further next week.

quinncurtis

1164 Posts

Posted - 21 Aug 2006 : 11:06:31

We decided that the WGReconnectDataSet method is not going to work with contour plots, because the WGContourPlot method does too much pre-processing of the contour plot data, pre-processing that the WGReconnectDataSet method doesn't do.

An alternative method is to delete the old contour plot object, define your new data, then create a new contour plot object. You can add new contour plot objects to the graph if you place them between the WGPreAddGraphObject and WGPostAddGraphObject methods. You can skip the WGDeletePlotBitmap and WGRedrawGraph calls.

Something like:

void CContourDView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	static LONG nCount = 1;
	CContourDDoc* pDoc = GetDocument(); // get document
	bool bitmapresult = false;

    if (!pDoc)
        return;
	if (!pGraph->WGIsGraphValid ())
		return;
    WGStart();

    // get datasets from document
	QCStaticData * pDataSet1 = NULL;
	// temp datasets
	QCStaticData * pTemp1= pDoc->pContourData;


	// create  new dataset
	// assigns new handle to dataset
	pDoc->MakeData();

	pDataSet1 =  pDoc->pContourData;

 	// get handles for line plot and scatter plot object
	HGOBJ hPlot = pGraph->hPlot;
	if (!hPlot) 
		return;

	// Delete old contour plot
	pGraph->WGDeleteObject(hPlot);
	// delete old dataset objects now
	if (pTemp1)
	  delete pTemp1;
	pTemp1 = NULL;
	if (pDoc->lpX1)
	  free( pDoc->lpX1);
	pDoc->lpX1 = NULL;

	// Add new contour plot
	pGraph->WGPreAddGraphObject();
	pGraph->AddContourGraph();
	pGraph->WGPostAddGraphObject();


	QCPageFormView::OnTimer(nIDEvent);
}

void CGraph::AddContourGraph()
{
      realtype rContourValues[] = {-3.5, -2.1, -1.1, 0.0, 2.1, 3.1, 4.1, 5.1};
	COLORREF rgbColors[] = {1, 11, 12, 13, 14, C_LIGHTGRAY, C_GREEN, C_RED, C_BLACK, C_BLACK};
    int nLineStyle[] = {PS_SOLID, PS_SOLID,PS_SOLID,PS_SOLID,PS_SOLID,PS_SOLID,PS_SOLID,PS_SOLID};
	int nLineWidth[] = {1,1,1,1,1,1,1,1};
	int bContourLineFlags[] = {TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE};
	int bContourLabelFlags[] = {TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE};
    int i, granularity;

	QCStaticData *   pContourData;  // data set handle
   CContourDDoc * pDoc = pSDoc;

  pContourData = (QCStaticData *) pDoc->pContourData;

    for (i=0; i < 8; i++)
		rgbColors[i] = WGGetRGBColor(rgbColors[i]);

   granularity = 1;
   WGSetTextParams (C_BLACK, FF_ROMAN, 10, TEXT_BOLD);
  
   hPlot = WGContourPlot (
        pContourData,
        rContourValues,
        rgbColors,    
		nLineStyle,
		nLineWidth,
	    7,
		granularity,
	    bContourLineFlags,
		bContourLabelFlags, 
		POS_RIGHT,
		POS_ABOVE,
		1,
		TRUE,
        GT_CONTOURFILL);
}

Frank

5 Posts

Posted - 21 Aug 2006 : 12:15:08

Thaks I will give this a try and get back to you. Appreciate your help.
Frank

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