xyslider.C
{
//Example of macro featuring two sliders
TFile *f = new TFile("hsimple.root");
TH2F *hpxpy = (TH2F*)f->Get("hpxpy");
TCanvas *c1 = new TCanvas("c1");
TPad *pad = new TPad("pad","lego pad",0.1,0.1,0.98,0.98);
pad->SetFillColor(33);
pad->Draw();
pad->cd();
gStyle->SetFrameFillColor(42);
hpxpy->SetFillColor(46);
hpxpy->Draw("lego1");
c1->cd();
//Create two sliders in main canvas. When button1 will be released
//the macro xysliderAction.C will be called.
TSlider *xslider = new TSlider("xslider","x",0.1,0.02,0.98,0.08);
xslider->SetMethod(".x xysliderAction.C");
TSlider *yslider = new TSlider("yslider","y",0.02,0.1,0.06,0.98);
yslider->SetMethod(".x xysliderAction.C");
}