Rene, Yes, that works.. Thank you! Ed > -----Original Message----- > From: Rene Brun [mailto:brun@pcbrun.cern.ch] > Sent: Friday, January 04, 2002 11:06 AM > To: Ed Oltman > Cc: roottalk@pcroot.cern.ch > Subject: Re: FW: [ROOT] Problem encountered processing mouse event in > win32 > > > Hi Ed, > > I have no way to test your case under Windows until I am back to CERN next > week. > Meanwhile, could you replace the statement: > parent->Fit("gaus","w","",roiLo,roiHi); > by > parent->Fit("gaus","w","same",roiLo,roiHi); > > Rene Brun > > On Fri, 4 Jan 2002, Ed Oltman wrote: > > > Rene, > > > > Even when I remove the following code > > > > gPad->DeleteExec("ex1"); > > > > from the running TExec object, the system still hangs if a Fit method is > > called. Is there a way I might get around this problem? Thanks! > > > > > > Ed Oltman > > > > > > > > -----Original Message----- > > From: Rene Brun [mailto:brun@pcbrun.cern.ch] > > Sent: Friday, January 04, 2002 3:48 AM > > To: Ed Oltman > > Cc: roottalk@pcroot.cern.ch > > Subject: Re: [ROOT] Problem encountered processing mouse event in win32 > > > > > > Ed, > > > > In your example, you delete the TExec object. This is illegal while > > executing the TExec object itself. > > > > Rene Brun > > > > On Thu, 3 Jan 2002, Ed Oltman wrote: > > > > > Hello, > > > > > > Are there documented limitations on the types of things that > can be done > > in > > > event handlers in root? I have a handler that allows interactive > > selection > > > of a region of interest of a histogram using the mouse: One > performs the > > > same mouse operations that are used for zoom along the > x-axis. It works > > > fine, until I add the fitting call - it performs the fit but never > > returns. > > > (comment out the fit and it works fine) I use hsimple.root in the > > > tutorials - any TH1F will work > > > > > > Here is my root session: > > > > > > root [0] TFile f("hsimple.root") > > > root [1] hpx->Draw() > > > <TCanvas::MakeDefCanvas>: created default TCanvas with name c1 > > > root [2] c1->AddExec("ex1",".x event.c") > > > root [3] ROI limits: -1.280000 1.280000 > > > FCN=21723.2 FROM MIGRAD STATUS=CONVERGED 73 CALLS 74 > > TOTAL > > > EDM=7.24727e-008 STRATEGY= 1 ERROR MATRIX > > > UNCERTAINTY 1.4 per cent > > > EXT PARAMETER STEP FIRST > > > NO. NAME VALUE ERROR SIZE DERIVATIVE > > > 1 Constant 7.95014e+002 2.94883e-001 5.95042e-005 > 3.14561e-004 > > > 2 Mean 9.96928e-003 4.72499e-004 -1.30032e-006 > 1.79069e-001 > > > 3 Sigma 1.00597e+000 7.17379e-004 -5.21731e-006 > 1.88585e+000 > > > > > > CTRL-C hit !!! ROOT is terminated ! > > > > > > [Note: I had to control-C out - no cpu was being used, root > simply hung] > > > > > > and here is my event handler - event.c > > > > > > { > > > // > > > // This allows selection of an ROI: > > > // > > > Float_t roiLo,roiHi; > > > int ix,ixl,ixh; > > > int event = gPad->GetEvent(); > > > > > > // only care about Button1Down (1) and Button1Up(11) events > > > if ((event!=1) && (event!=11) ) return; > > > TObject *select = gPad->GetSelected(); > > > > > > // only care if selected item is x-axis > > > if (strcmp(select->GetName(),"xaxis")!=0) return; > > > ix = gPad->GetEventX(); > > > TAxis *h = (TAxis*)select; > > > if (event==1) // button down > > > { > > > // compute lower limit of ROI > > > roiLo = gPad->AbsPixeltoX(ix); > > > ixl = h->FindBin(roiLo); > > > roiLo = h->GetBinLowEdge(ixl); > > > > > > } > > > else // button up > > > { > > > // disable event > > > gPad->DeleteExec("ex1"); > > > > > > // compute upper limit of ROI > > > roiHi = gPad->AbsPixeltoX(ix); > > > ixh = h->FindBin(roiHi); > > > roiHi = h->GetBinLowEdge(ixh)+h->GetBinWidth(ixh); > > > printf(" ROI limits: %f %f\n",roiLo,roiHi); > > > TH1F *parent = (TH1F *)h->GetParent(); > > > parent->Fit("gaus","w","",roiLo,roiHi); > > > } > > > } > > > > > > > > > I am running version 3.02/06 of root on Win2000. I am using VC++ v6 > > w/sp5. > > > Thanks.. > > > > > > > > > > > > Ed Oltman > > > > > > > > > > > > > > > > > > > > > > > > > >
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