TRootContextMenu.cxx

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// @(#)root/gui:$Id$
// Author: Fons Rademakers   12/02/98
 
/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
 
/** \class TRootContextMenu
    \ingroup guiwidgets
 
This class provides an interface to context sensitive popup menus.
These menus pop up when the user hits the right mouse button, and
are destroyed when the menu pops downs.
The picture below shows a canvas with a pop-up menu.
 
*/
 
 
#include "TRootContextMenu.h"
#include "TROOT.h"
#include "TGClient.h"
#include "TEnv.h"
#include "TList.h"
#include "TObjArray.h"
#include "TContextMenu.h"
#include "TMethod.h"
#include "TMethodArg.h"
#include "TMethodCall.h"
#include "TClass.h"
#include "TVirtualX.h"
#include "TCanvas.h"
#include "TDataMember.h"
#include "TToggle.h"
#include "TRootDialog.h"
#include "TDataType.h"
#include "TBrowser.h"
#include "TRootCanvas.h"
#include "TRootBrowser.h"
#include "TClassMenuItem.h"
#include "TObjectSpy.h"
#include "KeySymbols.h"
#include "RConfigure.h"
#include "strlcpy.h"
#include "snprintf.h"
 
enum EContextMenu {
   kToggleStart       = 1000, // first id of toggle menu items
   kToggleListStart   = 2000, // first id of toggle list menu items
   kUserFunctionStart = 3000  // first id of user added functions/methods, etc...
};
 
 
ClassImp(TRootContextMenu);
 
////////////////////////////////////////////////////////////////////////////////
/// Create context menu.
 
TRootContextMenu::TRootContextMenu(TContextMenu *c, const char *)
    : TGPopupMenu(gClient->GetDefaultRoot()), TContextMenuImp(c)
{
   fDialog  = 0;
   fTrash = new TList;
 
   AddInput(kButtonPressMask | kButtonReleaseMask);
   gROOT->GetListOfCleanups()->Add(this);
   // Context menu handles its own messages
   Associate(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Delete a context menu.
 
TRootContextMenu::~TRootContextMenu()
{
   gROOT->GetListOfCleanups()->Remove(this);
   delete fDialog;
   if (fTrash) fTrash->Delete();
   delete fTrash;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Display context popup menu for currently selected object.
 
void TRootContextMenu::DisplayPopup(Int_t x, Int_t y)
{
   if (fClient->IsEditable()) return;
 
   // delete menu items releated to previous object and reset menu size
   if (fEntryList) fEntryList->Delete();
   fCurrent = 0;
   if (fTrash)   fTrash->Delete();
   fMenuHeight = 6;
   fMenuWidth  = 8;
 
   // delete previous dialog
   if (fDialog) {
      delete fDialog;
      fDialog = 0;
   }
 
   // add menu items to popup menu
   CreateMenu(fContextMenu->GetSelectedObject());
 
   int    xx, yy, topx = 0, topy = 0;
   UInt_t w, h;
 
   if (fContextMenu->GetSelectedCanvas())
      gVirtualX->GetGeometry(fContextMenu->GetSelectedCanvas()->GetCanvasID(),
                        topx, topy, w, h);
 
   xx = topx + x + 1;
   yy = topy + y + 1;
 
#ifdef R__HAS_COCOA
   //Context menu must be transient for a canvas, otherwise it's possible
   //to break the z-order (for example, using alt-tab to switch between
   //different aplications). This hint works ONLY for canvas though
   //(otherwise selected canvas is null).
   TGWindow *parent = 0;
   if (TVirtualPad *pad = fContextMenu->GetSelectedCanvas())
      parent = dynamic_cast<TGWindow *>(pad->GetCanvasImp());
   else if ((pad = fContextMenu->GetSelectedPad()) && pad->GetCanvasImp())
      parent = dynamic_cast<TGWindow *>(pad->GetCanvasImp());
   else if (TBrowser * const browser = fContextMenu->GetBrowser())
      parent = dynamic_cast<TGWindow *>(browser->GetBrowserImp());
 
   if (parent)
      gVirtualX->SetWMTransientHint(GetId(), parent->GetId());
#endif
 
   PlaceMenu(xx, yy, kTRUE, kTRUE);
   // add some space for the right-side '?' (help)
   fMenuWidth += 5;
   Resize(GetDefaultWidth()+5, GetDefaultHeight());
}
 
////////////////////////////////////////////////////////////////////////////////
/// Decodes the Hierarchy="Level0/Level1/Level2/..." statement from the comment field
/// and returns the - if needed - created sub menu "Level0/Level1"
/// Returns the last component in last_component.
 
TGPopupMenu * TRootContextMenu::FindHierarchy(const char *commentstring, TString & last_component)
{
   TString cmd(commentstring);
   TString option;
   TString hierarchy;
   TGPopupMenu *currentMenu = 0;
 
   // search for arguments to the MENU statement
   // strcpy(cmd,commentstring);
   Ssiz_t opt_ptr;
   if ((opt_ptr=cmd.Index("*MENU={"))   != kNPOS ||
       (opt_ptr=cmd.Index("*SUBMENU={"))!= kNPOS ||
       (opt_ptr=cmd.Index("*TOGGLE={")) != kNPOS ) {
 
      Ssiz_t start = cmd.Index("{",opt_ptr) + 1;
      Ssiz_t end = cmd.Index("}",start);
      option = cmd(start,end - start);
 
      // Look for Hierarchy token
      TObjArray * array = option.Tokenize(";");
      TIter iter(array);
      TObject *obj;
      while((obj = iter())) {
         TString token(obj->GetName());
         if (token.Index("Hierarchy=\"") != kNPOS) {
            Ssiz_t tstart = token.Index("\"") + 1;
            Ssiz_t tend = token.Index("\"",tstart+1);
            if (tend == kNPOS) continue;
            hierarchy = token(tstart,tend - tstart);
         }
      }
      delete array;
   }
 
   // Build Hierarchy
   currentMenu = this;
   TObjArray * array = hierarchy.Tokenize("/");
   TIter iter(array);
   TObject *obj = iter();
   while(obj) {
      last_component = obj->GetName();
      obj = iter();
      if (obj) {
         TGMenuEntry *ptr;
         TIter next(currentMenu->GetListOfEntries());
         // Search for popup with corresponding name
         while ((ptr = (TGMenuEntry *) next()) &&
                (ptr->GetType() != kMenuPopup ||
                last_component.CompareTo(ptr->GetName()))) { }
         if (ptr)
            currentMenu = ptr->GetPopup();
         else {
            TGPopupMenu *r = new TGPopupMenu(gClient->GetDefaultRoot());
            // Alphabetical ordering
            TGMenuEntry *ptr2;
            TIter next2(currentMenu->GetListOfEntries());
            // Search for popup with corresponding name
            while ((ptr2 = (TGMenuEntry *) next2()) &&
                   (ptr2->GetType() != kMenuPopup  ||
                   last_component.CompareTo(ptr2->GetName()) > 0 )) { }
 
            currentMenu->AddPopup(last_component, r,ptr2);
            currentMenu = r;
            fTrash->Add(r);
            last_component = obj->GetName();
         }
      }
   }
 
   delete array;
   return currentMenu;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Add a entry to current menu with alphabetical ordering.
 
void TRootContextMenu::AddEntrySorted(TGPopupMenu *currentMenu, const char *s, Int_t id, void *ud,
                                         const TGPicture *p , Bool_t sorted)
{
   TGMenuEntry *ptr2 = 0;
   if (sorted) {
      TIter next(currentMenu->GetListOfEntries());
      // Search for popup with corresponding name
      while ((ptr2 = (TGMenuEntry *) next()) &&
             (ptr2->GetType() != kMenuEntry ||
             strcmp(ptr2->GetName(), s)<0 )) { }
   }
   currentMenu->AddEntry(s,id,ud,p,ptr2);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create the context menu depending on the selected object.
 
void TRootContextMenu::CreateMenu(TObject *object)
{
   if (!object || fClient->IsEditable()) return;
 
   int entry = 0, toggle = kToggleStart, togglelist = kToggleListStart;
   int userfunction = kUserFunctionStart;
 
   // Add a title
   AddLabel(fContextMenu->CreatePopupTitle(object));
   AddSeparator();
 
   // Get list of menu items from the selected object's class
   TList *menuItemList = object->IsA()->GetMenuList();
 
   TClassMenuItem *menuItem;
   TIter nextItem(menuItemList);
 
   while ((menuItem = (TClassMenuItem*) nextItem())) {
      switch (menuItem->GetType()) {
         case TClassMenuItem::kPopupSeparator:
            {
            TGMenuEntry *last = (TGMenuEntry *)GetListOfEntries()->Last();
            if (last && last->GetType() != kMenuSeparator)
               AddSeparator();
            break;
            }
         case TClassMenuItem::kPopupStandardList:
            {
               // Standard list of class methods. Rebuild from scratch.
               // Get linked list of objects menu items (i.e. member functions
               // with the token *MENU in their comment fields.
               TList *methodList = new TList;
               object->IsA()->GetMenuItems(methodList);
 
               TMethod *method;
               TClass  *classPtr = 0;
               TIter next(methodList);
               Bool_t needSep = kFALSE;
 
               while ((method = (TMethod*) next())) {
                  if (classPtr != method->GetClass()) {
                     needSep = kTRUE;
                     classPtr = method->GetClass();
                  }
 
                  TDataMember *m;
                  EMenuItemKind menuKind = method->IsMenuItem();
                  TGPopupMenu *currentMenu = 0;
                  TString last_component;
 
                  switch (menuKind) {
                     case kMenuDialog:
                        // search for arguments to the MENU statement
                        currentMenu = FindHierarchy(method->GetCommentString(),last_component);
                        if (needSep && currentMenu == this) {
                           AddSeparator();
                           needSep = kFALSE;
                        }
                        AddEntrySorted(currentMenu,last_component.Length() ? last_component.Data() : method->GetName(), entry++, method,0,currentMenu != this);
                        break;
                     case kMenuSubMenu:
                        if ((m = method->FindDataMember())) {
 
                           // search for arguments to the MENU statement
                           currentMenu = FindHierarchy(method->GetCommentString(),last_component);
 
                           if (m->GetterMethod()) {
                              TGPopupMenu *r = new TGPopupMenu(gClient->GetDefaultRoot());
                              if (needSep && currentMenu == this) {
                                 AddSeparator();
                                 needSep = kFALSE;
                              }
                              if (last_component.Length()) {
                                 currentMenu->AddPopup(last_component, r);
                              } else {
                                 currentMenu->AddPopup(method->GetName(), r);
                              }
                              fTrash->Add(r);
                              TIter nxt(m->GetOptions());
                              TOptionListItem *it;
                              while ((it = (TOptionListItem*) nxt())) {
                                 const char *name = it->fOptName;
                                 Long_t val = it->fValue;
 
                                 TToggle *t = new TToggle;
                                 t->SetToggledObject(object, method);
                                 t->SetOnValue(val);
                                 fTrash->Add(t);
 
                                 r->AddEntry(name, togglelist++, t);
                                 if (t->GetState())
                                    r->CheckEntry(togglelist-1);
                              }
                           } else {
                              if (needSep && currentMenu == this) {
                                 AddSeparator();
                                 needSep = kFALSE;
                              }
                              AddEntrySorted(currentMenu,last_component.Length() ? last_component.Data() : method->GetName(), entry++, method,0,currentMenu != this);
                           }
                        }
                        break;
 
                     case kMenuToggle:
                        {
                           TToggle *t = new TToggle;
                           t->SetToggledObject(object, method);
                           t->SetOnValue(1);
                           fTrash->Add(t);
                           // search for arguments to the MENU statement
                           currentMenu = FindHierarchy(method->GetCommentString(),last_component);
                           if (needSep && currentMenu == this) {
                              AddSeparator();
                              needSep = kFALSE;
                           }
                           AddEntrySorted(currentMenu,last_component.Length() ? last_component.Data() : method->GetName(), toggle++, t,0,currentMenu != this);
                           if (t->GetState()) currentMenu->CheckEntry(toggle-1);
                        }
                        break;
 
                     default:
                        break;
                  }
               }
               delete methodList;
            }
            break;
         case TClassMenuItem::kPopupUserFunction:
            {
               const char* menuItemTitle = menuItem->GetTitle();
               if (menuItem->IsToggle()) {
                  TMethod* method =
                        object->IsA()->GetMethodWithPrototype(menuItem->GetFunctionName(),menuItem->GetArgs());
                  if (method) {
                     TToggle *t = new TToggle;
                     t->SetToggledObject(object, method);
                     t->SetOnValue(1);
                     fTrash->Add(t);
 
                     if (strlen(menuItemTitle)==0) menuItemTitle = method->GetName();
                     AddEntry(menuItemTitle, toggle++, t);
                     if (t->GetState()) CheckEntry(toggle-1);
                  }
               } else {
                  if (strlen(menuItemTitle)==0) menuItemTitle = menuItem->GetFunctionName();
                  AddEntry(menuItemTitle,userfunction++,menuItem);
               }
            }
            break;
         default:
            break;
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create dialog object with OK and Cancel buttons. This dialog
/// prompts for the arguments of "method".
 
void TRootContextMenu::Dialog(TObject *object, TMethod *method)
{
   Dialog(object,(TFunction*)method);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Create dialog object with OK and Cancel buttons. This dialog
/// prompts for the arguments of "function".
/// function may be a global function or a method
 
void TRootContextMenu::Dialog(TObject *object, TFunction *function)
{
   Int_t selfobjpos;
 
   if (!function) return;
 
   // Position, if it exists, of the argument that correspond to the object itself
   if (fContextMenu->GetSelectedMenuItem())
      selfobjpos =  fContextMenu->GetSelectedMenuItem()->GetSelfObjectPos();
   else selfobjpos = -1;
 
   const TGWindow *w;
   if (fContextMenu->GetSelectedCanvas()) {
      TCanvas *c = (TCanvas *) fContextMenu->GetSelectedCanvas();
      // Embedded canvas has no canvasimp that is a TGFrame
      // coverity[returned_null]
      // coverity[dereference]
      if (c->GetCanvasImp()->IsA()->InheritsFrom(TGFrame::Class())) {
         w = fClient->GetWindowById(gVirtualX->GetWindowID(c->GetCanvasID()));
         if (!w) w = (TRootCanvas *) c->GetCanvasImp();
      } else {
         w = gClient->GetDefaultRoot();
      }
   } else if (fContextMenu->GetBrowser()) {
      TBrowser *b = (TBrowser *) fContextMenu->GetBrowser();
      w = (TRootBrowser *) b->GetBrowserImp();
   } else {
      w = gClient->GetDefaultRoot();
   }
   fDialog = new TRootDialog(this, w, fContextMenu->CreateDialogTitle(object, function));
 
   // iterate through all arguments and create apropriate input-data objects:
   // inputlines, option menus...
   TMethodArg *argument = 0;
 
   TIter next(function->GetListOfMethodArgs());
   Int_t argpos = 0;
 
   while ((argument = (TMethodArg *) next())) {
      // Do not input argument for self object
      if (selfobjpos != argpos) {
         const char *argname    = fContextMenu->CreateArgumentTitle(argument);
         const char *type       = argument->GetTypeName();
         TDataType  *datatype   = gROOT->GetType(type);
         const char *charstar   = "char*";
         char        basictype[32];
 
         if (datatype) {
            strlcpy(basictype, datatype->GetTypeName(), 32);
         } else {
            TClass *cl = TClass::GetClass(type);
            if (strncmp(type, "enum", 4) && (cl && !(cl->Property() & kIsEnum)))
               Warning("Dialog", "data type is not basic type, assuming (int)");
            strlcpy(basictype, "int", 32);
         }
 
         if (strchr(argname, '*')) {
            strlcat(basictype, "*",32);
            if (!strncmp(type, "char", 4) || !strncmp(type, "Option_t", 8))
               type = charstar;
            else if (strstr(argname, "[default:")) {
               // skip arguments that are pointers (but not char *)
               // and have a default value
               argpos++;
               continue;
            }
         }
 
         TDataMember *m = argument->GetDataMember();
         if (m && object && m->GetterMethod(object->IsA())) {
 
            // Get the current value and form it as a text:
 
            char val[256];
 
            if (!strncmp(basictype, "char*", 5)) {
               char *tdefval;
               m->GetterMethod()->Execute(object, "", &tdefval);
               strlcpy(val, tdefval, sizeof(val));
            } else if (!strncmp(basictype, "float", 5) ||
                       !strncmp(basictype, "double", 6)) {
               Double_t ddefval;
               m->GetterMethod()->Execute(object, "", ddefval);
               snprintf(val,256, "%g", ddefval);
            } else if (!strncmp(basictype, "char", 4) ||
                       !strncmp(basictype, "bool", 4) ||
                       !strncmp(basictype, "int", 3)  ||
                       !strncmp(basictype, "long", 4) ||
                       !strncmp(basictype, "short", 5)) {
               Longptr_t ldefval;
               m->GetterMethod()->Execute(object, "", ldefval);
               snprintf(val, 256, "%zi", (size_t)ldefval);
            }
 
            // Find out whether we have options ...
            if (m->GetOptions()) {
               Warning("Dialog", "option menu not yet implemented");
#if 0
               TMotifOptionMenu *o= new TMotifOptionMenu(argname);
               TIter nextopt(opt);
               TOptionListItem *it = 0;
               while ((it = (TOptionListItem*) nextopt())) {
                  char *name  = it->fOptName;
                  char *label = it->fOptLabel;
                  Long_t value  = it->fValue;
                  if (value != -9999) {
                     char val[256];
                     snprintf(val,256, "%li", value);
                     o->AddItem(name, val);
                  }else
                     o->AddItem(name, label);
               }
               o->SetData(val);
               fDialog->Add(o);
#endif
            } else {
               // we haven't got options - textfield ...
               fDialog->Add(argname, val, type);
            }
         } else {    // if m not found ...
 
            char val[256] = "";
            const char *tval = argument->GetDefault();
            if (tval && strlen(tval)) {
               // Remove leading and trailing quotes
               strlcpy(val, tval + (tval[0] == '"' ? 1 : 0), sizeof(val));
               if (val[strlen(val)-1] == '"')
                  val[strlen(val)-1]= 0;
            }
            fDialog->Add(argname, val, type);
         }
      }
      argpos++;
   }
 
   fDialog->Popup();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Draw context menu entry.
 
void TRootContextMenu::DrawEntry(TGMenuEntry *entry)
{
   int ty, offset;
   static int max_ascent = 0, max_descent = 0;
 
   TGPopupMenu::DrawEntry(entry);
   // draw the ? (help) in the right side when highlighting a menu entry
   if (entry->GetType() == kMenuEntry && (entry->GetStatus() & kMenuActiveMask)) {
      if (max_ascent == 0) {
         gVirtualX->GetFontProperties(fFontStruct, max_ascent, max_descent);
      }
      offset = (entry->GetEh() - (max_ascent + max_descent)) / 2;
      ty = entry->GetEy() + max_ascent + offset - 1;
      TGHotString s("&?");
      s.Draw(fId, fSelGC, fMenuWidth-12, ty);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle button event in the context menu.
 
Bool_t TRootContextMenu::HandleButton(Event_t *event)
{
   int   id;
   void *ud = 0;
 
   if ((event->fType == kButtonRelease) && (event->fX >= (Int_t)(fMenuWidth-15)) &&
       (event->fX <= (Int_t)fMenuWidth)) {
      id = EndMenu(ud);
      if (fHasGrab) gVirtualX->GrabPointer(0, 0, 0, 0, kFALSE);  // ungrab
      if (ud) {
         // retrieve the highlighted function
         TFunction *function = 0;
         if (id < kToggleStart) {
            TMethod *m = (TMethod *)ud;
            function = (TFunction *)m;
         } else if (id >= kToggleStart && id < kUserFunctionStart) {
            TToggle *t = (TToggle *)ud;
            TMethodCall *mc = (TMethodCall *)t->GetSetter();
            function = (TFunction *)mc->GetMethod();
         } else {
            TClassMenuItem *mi = (TClassMenuItem *)ud;
            function = gROOT->GetGlobalFunctionWithPrototype(mi->GetFunctionName());
         }
         if (function)
            fContextMenu->SetMethod(function);
      }
      OnlineHelp();
      return kTRUE;
   }
   return TGPopupMenu::HandleButton(event);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle pointer crossing event in context menu.
 
Bool_t TRootContextMenu::HandleCrossing(Event_t *event)
{
   if (event->fType == kLeaveNotify) {
      // just to reset the mouse pointer...
      HandleMotion(event);
   }
   return TGPopupMenu::HandleCrossing(event);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle pointer motion event in context menu.
 
Bool_t TRootContextMenu::HandleMotion(Event_t *event)
{
   static int toggle = 0;
   static Cursor_t handCur = kNone, rightCur = kNone;
   static UInt_t mask = kButtonPressMask | kButtonReleaseMask | kPointerMotionMask;
 
   if (handCur == kNone)
      handCur    = gVirtualX->CreateCursor(kHand);
   if (rightCur == kNone)
      rightCur   = gVirtualX->CreateCursor(kArrowRight);
 
   if (event->fType == kLeaveNotify) {
      gVirtualX->ChangeActivePointerGrab(fId, mask, rightCur);
      toggle = 0;
      return kTRUE;
   }
   // change the cursot to a small hand when over the ? (help)
   if ((event->fX >= (Int_t)(fMenuWidth-15)) && (event->fX <= (Int_t)fMenuWidth) &&
       fCurrent && (fCurrent->GetType() == kMenuEntry)) {
      if (toggle == 0) {
         gVirtualX->ChangeActivePointerGrab(fId, mask, handCur);
         toggle = 1;
      }
   }
   else {
      if (toggle == 1) {
         gVirtualX->ChangeActivePointerGrab(fId, mask, rightCur);
         toggle = 0;
      }
   }
   return TGPopupMenu::HandleMotion(event);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Open the online help matching the actual class/method.
 
void TRootContextMenu::OnlineHelp()
{
   TString clname;
   TString cmd;
   TString url = gEnv->GetValue("Browser.StartUrl", "http://root.cern.ch/root/html/");
   if (url.EndsWith(".html", TString::kIgnoreCase)) {
      if (url.Last('/') != kNPOS)
         url.Remove(url.Last('/'));
   }
   if (!url.EndsWith("/")) {
      url += '/';
   }
   TObject *obj = fContextMenu->GetSelectedObject();
   if (obj) {
      clname = obj->ClassName();
      if (fContextMenu->GetSelectedMethod()) {
         TString smeth = fContextMenu->GetSelectedMethod()->GetName();
         TMethod *method = obj->IsA()->GetMethodAllAny(smeth.Data());
         if (method) clname = method->GetClass()->GetName();
         url += clname;
         url += ".html";
         url += "#";
         url += clname;
         url += ":";
         url += smeth.Data();
      }
      else {
         url += clname;
         url += ".html";
      }
      if (fDialog) delete fDialog;
      fDialog = 0;
      cmd = TString::Format("new TGHtmlBrowser(\"%s\", 0, 900, 300);", url.Data());
      gROOT->ProcessLine(cmd.Data());
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Handle context menu messages.
 
Bool_t TRootContextMenu::ProcessMessage(Longptr_t msg, Longptr_t parm1, Longptr_t parm2)
{
   TObjectSpy savedPad;
   if (GetContextMenu()->GetSelectedPad()) {
      savedPad.SetObject(gPad);
      gPad = GetContextMenu()->GetSelectedPad();
   }
 
   switch (GET_MSG(msg)) {
 
      case kC_COMMAND:
 
         switch (GET_SUBMSG(msg)) {
 
            case kCM_MENU:
 
               if (parm1 < kToggleStart) {
                  TMethod *m = (TMethod *) parm2;
                  GetContextMenu()->Action(m);
               } else if (parm1 >= kToggleStart && parm1 < kToggleListStart) {
                  TToggle *t = (TToggle *) parm2;
                  GetContextMenu()->Action(t);
               } else if (parm1 >= kToggleListStart && parm1<kUserFunctionStart) {
                  TToggle *t = (TToggle *) parm2;
                  if (t->GetState() == 0)
                     t->SetState(1);
               } else {
                  TClassMenuItem *mi = (TClassMenuItem*)parm2;
                  GetContextMenu()->Action(mi);
               }
               break;
 
            case kCM_BUTTON:
               if (parm1 == 1) {
                  const char *args = fDialog->GetParameters();
                  GetContextMenu()->Execute((char *)args);
                  delete fDialog;
                  fDialog = 0;
               }
               if (parm1 == 2) {
                  const char *args = fDialog->GetParameters();
                  GetContextMenu()->Execute((char *)args);
               }
               if (parm1 == 3) {
                  delete fDialog;
                  fDialog = 0;
               }
               if (parm1 == 4) {
                  OnlineHelp();
               }
               break;
 
            default:
               break;
         }
         break;
 
      case kC_TEXTENTRY:
 
         switch (GET_SUBMSG(msg)) {
 
            case kTE_ENTER:
               {
                  const char *args = fDialog->GetParameters();
                  GetContextMenu()->Execute((char *)args);
                  delete fDialog;
                  fDialog = 0;
               }
               break;
 
            default:
               break;
         }
         break;
 
      default:
         break;
   }
 
   if (savedPad.GetObject()) gPad = (TVirtualPad*) savedPad.GetObject();
 
   return kTRUE;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Close the context menu if the object is deleted in the
/// RecursiveRemove() operation.
 
void TRootContextMenu::RecursiveRemove(TObject *obj)
{
   void *ud;
   if (obj == fContextMenu->GetSelectedCanvas())
      fContextMenu->SetCanvas(0);
   if (obj == fContextMenu->GetSelectedPad())
      fContextMenu->SetPad(0);
   if (obj == fContextMenu->GetSelectedObject()) {
      // if the object being deleted is the one selected,
      // ungrab the mouse pointer and terminate (close) the menu
      fContextMenu->SetObject(0);
      if (fHasGrab)
         gVirtualX->GrabPointer(0, 0, 0, 0, kFALSE);
      EndMenu(ud);
   }
}