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ok, thanks
solved most of the probs.
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Rebuild Xgrapjic_src then you can get debug and release version.
You have to copy this two files to xgraphic-demo folder.
That is all.
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Great work Gunnar & co!!
Is it possible to configure it to work like an oscilloscope? I mean, adding points dynamically and viewing just the last N points added.
Bye,
Marc.
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This is the answer I note below...
Hi
Here is one solution for your reference.I guess that you want a dynamic chart in which X value is increasing with time and Y value is random or defined under your command.If it is,you can use setdata() to feed your requirements.
Following is some sample code FYI...
======================================================
void CXGraphDemoView::OnDrawChart()
{
// TODO: Add your command handler code here
// setup data
timer1=SetTimer(1000,10,NULL);
// m_Graph.GetXAxis(0).SetCurrentRange(-500,0,30);
}
void CXGraphDemoView::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
// for (int i = 0; i < VALCOUNT; i++)
if (nCount {
m_Values[nCount].fYVal = -85 + (( sin(nCount / 180.0 * 3.14115926) * 10));
m_Values[nCount].fXVal = nCount;
m_Graph.SetData (m_Values, nCount+1, 0, 0, 0);
m_Graph.GetYAxis(0).SetCurrentRange(-120,-40,10);
m_Graph.GetXAxis(0).SetCurrentRange(0,500,30);
if (nCount>500)
{
m_Graph.GetXAxis(0).SetCurrentRange(nCount-500,nCount,30);
}
m_Graph.Invalidate();
}
nCount++;
CView::OnTimer(nIDEvent);
}
void CXGraphDemoView::OnStopTimer()
{
// TODO: Add your command handler code here
if (timer1!=NULL)
{
KillTimer(timer1);
TRACE("Stopped.\n");
}
}
================================================================
At first you can allocate big enough array to contain your data(X/Y values) and initialized with zero.Then update the array values with pair of X/Y value and use SetData(,Count,) to increase count to update the graph data.You can get one dynamic chart floating with time.
Thanks for the author's great job!
Cheers!
Sam Zhao
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Yeah, but there's a problem implied: the data buffer has to be so big or it has to increase dynamically and it's unavailable for an application running 24x7. I've modified your code to mantain and view a buffer of VALCOUNT elements:
<br />
void CXGraphDemoView::OnTimer(UINT nIDEvent) <br />
{<br />
bool bMoveRange = false;<br />
<br />
TDataPoint m_ValuesAux[VALCOUNT-1];<br />
if(nCount == VALCOUNT) <br />
{<br />
bMoveRange = true;<br />
nCount--;<br />
}<br />
if(bMoveRange)<br />
{<br />
memcpy(m_ValuesAux, &m_Values[1], sizeof(m_ValuesAux));
memcpy(m_Values, m_ValuesAux, sizeof(m_ValuesAux));<br />
}<br />
<br />
m_Values[nCount].fXVal = m_iGlobalCounter;<br />
m_Values[nCount].fYVal = ;<br />
<br />
m_Graph.SetData(m_Values, nCount+1, 0, 0, 0, false);<br />
<br />
if(bMoveRange)<br />
m_Graph.GetXAxis(0).SetCurrentRange(m_iGlobalCounter-VALCOUNT+1, m_iGlobalCounter,10); <br />
else<br />
m_Graph.GetXAxis(0).SetCurrentRange(0,VALCOUNT,10);<br />
<br />
<br />
nCount++;<br />
m_iGlobalCounter++;<br />
}<br />
Another item would be to disable the X-axis value labels. Can they be disabled?
Cheers,
Marc Soleda
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Hi,
Yeah.You are right.Really this is a problem during floating chart.But I think the method that you dynamically increase the array size is not so efficient.As you know frequent memory reallocation such as realloc() is not recommended here.
From my side I am trying to implementing one floating chart versus time.I also need one big engough arry to contain the data.My idea is I create one function which is likely with C style funciton realloc().I named it ReNew() as following for your reference.
////////////////////////
template <class t="">
T* ReNew(T* p,long nSize,long nGranularity)
{
T* p1=new T[nSize+nGranularity];
memset(p1,0,nSize+nGranularity);
memcpy(p1,p,nSize);
delete[] p;//Is it necessary???Yeah.
return p1;
}
///////////////////////
In case that you have to increase you array size.You can prepare another big enough block to meet the increasing memory need.With one Granularity variable you can control the mem reallocation.You can do this in you data updating section which is a good place to control Mem need.
Cheers
Sam Zhao
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Yeah, maybe in your case, that you need a historical view of data it's better but in my one, where I need the current view, it's enough to reorganize the array, copying the VALCOUNT-1 values to an auxiliar array. I'm not increasing the array size dynamically.
Cheers,
Marc Soleda
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Whooo.....
I see...Really it is very different case that we face....I need one historical chart view of all the record.
Cheers.
Sam Zhao
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1. precompiled header error
go to the "project" -> "settings" menu, choose "settings for all configurations", choose the "C/C++" screen and there the category "precompiled headers". select the second radio button for using precompiled headers autommaticly with the header "stdafx.h"
2. other build problems
try to build a "Win32 Release" or "Win32 Debug" instead of a "Win32 Unicode Release" or "Win32 Unicode Debug". For this go to "build" -> "set active configuration" menu and choose "XGRAPH - Win32 Release" or "XGRAPH - Win32 Debug"
3. doubleclick / properties bug:
search for "cbFillCurve" in CurveDlg.cpp, CurveDlg.h and resource.h, and comment out all the lines including this string.
4. background-redrawing bug:
go to XGRAPH.cpp, search for the string "pmdc = new CMemDC(pdc)" (should be about line 920), comment it out and add the four following lines insetead of it:
CRect empty, client;
GetClientRect( client );
empty.SetRectEmpty();
pmdc = new CMemDC(pdc, empty, client);
hope it could help. regards from Lake Constance, greg.
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Hi,Sir
Thanks for your message!Under your steps I got successful results!
Cheers!
Sam Zhao
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I still cannot get the double click to work. Would you please send me a a zip file for the working version?
thanks
Andrew
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Does anyone know how to use this control to plot dynamic data?.
I have a function which is called when a new value(val) enters my application.
I want to plot this new value at point : x = x+1 , y = val. The graph should then jump one step to the left if x is larger than x_max.
Best regards Bjornarsen
Bjornarsen
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Hi
Here is one solution for your reference.I guess that you want a dynamic chart in which X value is increasing with time and Y value is random or defined under your command.If it is,you can use setdata() to feed your requirements.
Following is some sample code FYI...
======================================================
void CXGraphDemoView::OnDrawChart()
{
// TODO: Add your command handler code here
// setup data
timer1=SetTimer(1000,10,NULL);
// m_Graph.GetXAxis(0).SetCurrentRange(-500,0,30);
}
void CXGraphDemoView::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
// for (int i = 0; i < VALCOUNT; i++)
if (nCount<valcount)
{
="" m_values[ncount].fyval="-85" +="" ((="" sin(ncount="" 180.0="" *="" 3.14115926)="" 10));
="" m_values[ncount].fxval="nCount;
" m_graph.setdata="" (m_values,="" ncount+1,="" 0,="" 0);
="" m_graph.getyaxis(0).setcurrentrange(-120,-40,10);
="" m_graph.getxaxis(0).setcurrentrange(0,500,30);
="" if="" (ncount="">500)
{
m_Graph.GetXAxis(0).SetCurrentRange(nCount-500,nCount,30);
}
m_Graph.Invalidate();
}
nCount++;
CView::OnTimer(nIDEvent);
}
void CXGraphDemoView::OnStopTimer()
{
// TODO: Add your command handler code here
if (timer1!=NULL)
{
KillTimer(timer1);
TRACE("Stopped.\n");
}
}
================================================================
At first you can allocate big enough array to contain your data(X/Y values) and initialized with zero.Then update the array values with pair of X/Y value and use SetData(,Count,) to increase count to update the graph data.You can get one dynamic chart floating with time.
Thanks for the author's great job!
Cheers!
Sam Zhao
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This property bug is met in my side too.Refer to prev articals it seems that the auther has known this bug and will provide one fixed version.But till now we can't see it.
Do any one have fixed this bug?Can you share your solution?I tried to fix it under one user's steps.But seems no effect...
I met this issue under release and debug mode.
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You must open de XGraph_src project.
Then, edit IDD_CURVE dialog and add a combobox called IDC_CBFILLCURVE in the same position that you can see in the example (Xgraph_bin).
Recompile it, and the problem is solved
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still does not work, can someone send me a working version?
I got a lot of crashes with this code.
andrew_xiang@yahoo.com
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i compiled the pure demo with vc++6 and get an "debug assertion failed" message in dlgdata.cpp, line 43 when i doubleclick on one of the graphs. this happens in both, release and debug version. is this a bug or have i forgotten to do some changes?
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Prev artical by another also mentioned this bug in the posted code here.But this bug is fixed in author's demo DLL file.Maybe the great author mixed up the source code here .
Another problem in the posted project is about the project settings.Refer to prev artical you can find that you should modify the setting to get sucessful DLL in debug mode.
Hope the auther would provide another release to improve this great job!
Cheers!
Chao
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--------------------Configuration: XGRAPH - Win32 Debug--------------------
Build : warning : failed to (or don't know how to) build 'E:\Temp\Graph Source\XGraph_src\Debug\XGRAPH.pch'
Compiling...
StdAfx.cpp
e:\temp\graph source\xgraph_src\stdafx.cpp(5) : fatal error C1083: Cannot open precompiled header file: 'Debug/XGRAPH.pch': No such file or directory
Error executing cl.exe.
XGRAPH10d.dll - 1 error(s), 1 warning(s)
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try to build the "Win32" Release or Debug instead of the "Win32 Unicode" Release or Debug
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Prev thread has mentioned this issue.
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Most of the problems on XGraph discussed here before still have no answers...
So, when I looked at it closer I've found some troubles that're very important to me:
1. It will be nice if I could rotate text by 90 degree when using the date-time format on X axis so it could comprise more values.
2. Famous assertion on dbl-click (properties dialog).
3. Print and print preview still don't work.
4. There's some clipping problems while displaying values on X axis. That problem can be figured out on the screenshot provided in the original article.
5. Can I enlarge the bitmap resolution on saving?
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I am trying to use the graph in visual basic and I cant add the dll as a reference or control. What is the way to use this control in a visual basic application?
Abhi
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Hey,
just a short problem report, when you delete the curves which gives the maxmima and minima for the autoscaling the autoscaling is not refreshed and stays on the values of the delete curves. This only will change when you bring in a new curve with greater max and smaller min.
Cheers!
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thank you for this very nice component.
But have you updated the demo sources.
I cannot compile sources with VC++ .NET (functions are not found at link).
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