// example.C

#include <TGClient.h>
#include <TCanvas.h>
#include <TF1.h>
#include <TRandom.h>
#include <TGButton.h>
#include <TGFrame.h>
#include <TRootEmbeddedCanvas.h>
#include <RQ_OBJECT.h>

class MyMainFrame {
    RQ_OBJECT("MyMainFrame")
private:
    TGMainFrame         *fMain;
    TRootEmbeddedCanvas *fEcanvas;
    //TF1 *f1;
    public:
    int i;
    MyMainFrame(const TGWindow *p,UInt_t w,UInt_t h);
    virtual ~MyMainFrame();
    TF1 *f1;
    TH1F *hist;
    float randon;
    void DoDraw();
    void Massimo(TH1F*);
};
MyMainFrame::MyMainFrame(const TGWindow *p,UInt_t w,UInt_t h) {
    // Create a main frame
    fMain = new TGMainFrame(p,w,h);
    
    // Create canvas widget
    fEcanvas = new TRootEmbeddedCanvas("Ecanvas",fMain,500,200);
    fMain->AddFrame(fEcanvas, new TGLayoutHints(kLHintsExpandX |
                                                kLHintsExpandY, 10,10,10,1));
    // Create a horizontal frame widget with buttons
    TGHorizontalFrame *hframe = new TGHorizontalFrame(fMain,200,40);
    TGTextButton *draw = new TGTextButton(hframe,"&Draw");
    draw->Connect("Clicked()","MyMainFrame",this,"DoDraw()");
    hframe->AddFrame(draw, new TGLayoutHints(kLHintsCenterX,
                                             5,5,3,4));
    TGTextButton *Max = new TGTextButton(hframe,"&Max");
    Max->Connect("Clicked()","MyMainFrame",this,"Massimo()");
    hframe->AddFrame(Max, new TGLayoutHints(kLHintsCenterX,
                                             5,5,3,4));
    TGTextButton *exit = new TGTextButton(hframe,"&Exit",
                                          "gApplication->Terminate(0)");
    hframe->AddFrame(exit, new TGLayoutHints(kLHintsCenterX,
                                             5,5,3,4));
    fMain->AddFrame(hframe, new TGLayoutHints(kLHintsCenterX,
                                              2,2,2,2));
    
    // Set a name to the main frame
    fMain->SetWindowName("Simple Example");
    
    // Map all subwindows of main frame
    fMain->MapSubwindows();
    
    // Initialize the layout algorithm
    fMain->Resize(fMain->GetDefaultSize());
    
    // Map main frame
    fMain->MapWindow();
}
void MyMainFrame::DoDraw() {
     //Draws function graphics in randomly chosen interval
//TF1 *f1 = new TF1("f1","3*x*x-5*x",0,gRandom->Rndm()*10);
//    f1->SetLineWidth(3);
//    f1->Draw();
    TH1F*hist=new TH1F("","",100,-10,10);
    for(i=0;i<10000;i++){
        randon= gRandom->Gaus(0,2);
        hist->Fill(randon);
        hist->Draw();
    }
    TCanvas *fCanvas = fEcanvas->GetCanvas();
    fCanvas->cd();
    fCanvas->Update();
}
void MyMainFrame::Massimo(TH1F* histo) {
    // Draws function graphics in randomly chosen interval
    
    cout<<"WOW"<<endl;
    float max=histo->GetMaximum();
    cout<<max<<endl;
}
MyMainFrame::~MyMainFrame() {
    // Clean up used widgets: frames, buttons, layout hints
    fMain->Cleanup();
    delete fMain;
}
void example() {
    new MyMainFrame(gClient->GetRoot(),500,200);
}