customContextMenu.C

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/// \file
/// \ingroup tutorial_gui
/// Example showing how to add a function to the class context menu
///
/// \macro_code
///
/// \author Ilka Antcheva
 
#include "TH1.h"
#include "TClassMenuItem.h"
#include "TList.h"
 
void poptest1(int a = 5, int b = 56);
void poptest2(int a, int b, TObject *c);
void poptest2bis(TObject *c);
int poptest3();
void poptest4(char *ch);
 
void customContextMenu()
{
   TH1F *h;
   TH1F *h2;
   TClassMenuItem *n;
   TList *l;
 
   // Create test histograms
   h = new TH1F("h", "Schtroumpf", 100, -4, 4);
   h->FillRandom("gaus");
   h->Draw();
 
   h2 = new TH1F("h2", "h2", 1000, -4, 4);
   h2->FillRandom("gaus", 30000);
 
   // Retrieve menu list from TClass
   TClass *cl = h->IsA();
   l = cl->GetMenuList();
 
   // Add some items to the popup menus
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "Test object, draw a second h", "Draw", h2,
                          "Option_t*");
   l->AddFirst(n);
   n = new TClassMenuItem(TClassMenuItem::kPopupSeparator, cl);
   l->AddFirst(n);
 
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "test no 4", "poptest4", 0, "const char*");
   l->AddFirst(n);
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "test no 3", "poptest3", 0, "");
   l->AddFirst(n);
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "test no 2 bis", "poptest2bis", 0, "TObject*", 2);
   l->AddFirst(n);
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "test no 2", "poptest2", 0, "int,int,TObject*", 2);
   l->AddFirst(n);
   n = new TClassMenuItem(TClassMenuItem::kPopupUserFunction, cl, "test no 1", "poptest1", 0, "int,int");
   l->AddFirst(n);
}
 
void poptest1(int a, int b)
{
   printf("poptest1 %d %d\n", a, b);
}
 
void poptest2(int a, int b, TObject *c)
{
   // Remark: the object c will not be asked for since it is the selected object
   printf("poptest2 %d %d\n", a, b);
   printf("histo : %lx\n", (Long_t)c);
   printf("title of the histogram : %s\n", ((TH1F *)c)->GetTitle());
}
 
void poptest2bis(TObject *c)
{
   // Remark: the object c will not be asked for since it is the selected object
   printf("poptest2bis\n");
   printf("histo : %lx\n", (Long_t)c);
   printf("title of the histogram : %s\n", ((TH1F *)c)->GetTitle());
}
 
int poptest3()
{
   printf("poptest3\n");
   return 12;
}
 
void poptest4(const char *ch)
{
   printf("poptest4 %s\n", ch);
}