Continue after TApplication::Run()

ROOT
1

Hello!

I’m running the root version 5.22 with VC++ 9.0. In my code I have the function openAnalyzeModule_man that creates an object of my class RadialMeasurement2 and calls RadialMeasurement2::plotRadDev which will do a plot using a TCanvas and TMultigraph object.

When the plot (canvas) is closed by the user I want the program to continue at the point from whil openAnalyzeModule_man was called. Unfortunately, the complete program terminates if i click on “Quit ROOT” in the File menu of the canvas.

I searched in the RootTalk archive and found the solution using TApplication::Run(kTRUE) but this doesn’t work, too.

Do you have a solution for my problem?

Thanks a lot!
Nicholas

The important parts of the source code:

[code]void openAnalyzeModule_man(CStr fileL, CStr fileR, double combAngle, double deltaR, double relXPos, double tableAngle, CStr fileStats, double limits)
{
TApplication AppAuswertung(“Wire Measurement”, NULL, NULL);
RadialMeasurement2 current_measurement (fileL, fileR, tableAngle * PI / 180.0, combAngle * PI / 180.0, deltaR);

if (current_measurement.isAllOk()) {
	current_measurement.justDoItUsingBoth(relXPos);
	if (fileStats!="") current_measurement.saveStatistics(fileStats, 0, 0, 0);
	current_measurement.plotRadDev(limits);
}
else cout << "\nError! Module could not be analyzed.\n";

AppAuswertung.Run(kTRUE);

}[/code]

[code]void RadialMeasurement2::plotRadDev(double limits)
{
double wireNo [200], e_y [200], e_z [200];

// initialise some arrays for the root plot

for (int i=0; i<noWires; i++) {
	e_y[i]=0;
	e_z[i]=0;
	wireNo[i]=(double) i;
}

TCanvas * canvas = new TCanvas("canvas","Radial Deviation",200,10,700,500);
TMultiGraph *mg = new TMultiGraph();

canvas->SetFillColor(10);
canvas->SetGrid();
canvas->GetFrame()->SetFillColor(10);
canvas->GetFrame()->SetBorderSize(10);

TGraphErrors *gr_data = new TGraphErrors(noWires,wireNo,radDev,e_y,e_z);

gr_data->SetMarkerColor(4);
gr_data->SetMarkerStyle(2);

mg->Add(gr_data);
mg->Draw("AP");

TAxis * x_axis = mg->GetXaxis();
TAxis * y_axis = mg->GetYaxis();

mg->SetMinimum (-limits);
mg->SetMaximum (limits);
x_axis->SetTitle("Wire No.");
y_axis->SetTitle("Radial Deviation [mm]");
x_axis->CenterTitle();
y_axis->CenterTitle();
mg->Draw("AP");

}[/code]

2

[quote]Unfortunately, the complete program terminates if i click on “Quit ROOT” in the File menu of the canvas. [/quote]This is the intended behavior. ‘Quit ROOT’ means exit the program entirely. Use ‘close canvas’ instead.

Cheers,
Philippe.

3

I solved the problem now!

I had initialized a second instance of TApplication somewhere else in the source code by mistake.

Now it works but I have to call TCanvas::Close() after TApplication::Run(). Because I initialized the TCanvas object inside the plotRadDev function I need to return a pointer on it in order to close it after the application run. This is in fact a dirty solution but it works…