GRootBrowser.cxx

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#include "TROOT.h"
#include "TSystem.h"
#include "TApplication.h"
#include "TBrowser.h"
#include "TGClient.h"
#include "TGFrame.h"
#include "TGTab.h"
#include "TGMenu.h"
#include "TGLayout.h"
#include "TGSplitter.h"
#include "TGStatusBar.h"
#include "Varargs.h"
#include "TInterpreter.h"
#include "TGFileDialog.h"
#include "TObjString.h"
#include "TVirtualPad.h"
#include "TVirtualX.h"
#include "TEnv.h"
#include <KeySymbols.h>
 
#include "RConfigure.h"
 
#include "GRootBrowser.h"
#include "TGFileBrowser.h"
#include "TGInputDialog.h"
#include "TRootHelpDialog.h"
#include "TVirtualPadEditor.h"
#include "HelpText.h"
#include "Getline.h"
 
#include "TChannel.h"
#include "TKey.h"
 
#ifdef WIN32
#include <TWin32SplashThread.h>
#endif
 
static std::array<const char*, 6> gOpenFileTypes = {"ROOT files", "*.root", "All files", "*", nullptr, nullptr};
 
static std::array<const char*, 6> gPluginFileTypes = {"ROOT files", "*.C", "All files", "*", nullptr, nullptr};
 
//______________________________________________________________________________
GRootBrowser::GRootBrowser(TBrowser* b, const char* name, UInt_t width, UInt_t height, Option_t* opt, Bool_t initshow)
   : TGMainFrame(gClient->GetDefaultRoot(), width, height), TBrowserImp(b)
{
   /// Create browser with a specified width and height.
 
   CreateBrowser(name);
   Resize(width, height);
   if(initshow) {
      InitPlugins(opt);
      MapWindow();
   }
   TQObject::Connect("TCanvas", "ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", "GRootBrowser", this, "EventInfo(Int_t, Int_t, Int_t, TObject*)");
   gVirtualX->SetInputFocus(GetId());
}
 
//______________________________________________________________________________
GRootBrowser::GRootBrowser(TBrowser* b, const char* name, Int_t x, Int_t y, UInt_t width, UInt_t height, Option_t* opt, Bool_t initshow)
   : TGMainFrame(gClient->GetDefaultRoot(), width, height), TBrowserImp(b)
{
   /// Create browser with a specified width and height and at position x, y.
 
   CreateBrowser(name);
   MoveResize(x, y, width, height);
   SetWMPosition(x, y);
   if(initshow) {
      InitPlugins(opt);
      MapWindow();
   }
   TQObject::Connect("TCanvas", "ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", "GRootBrowser", this, "EventInfo(Int_t, Int_t, Int_t, TObject*)");
   gVirtualX->SetInputFocus(GetId());
}
 
//______________________________________________________________________________
void GRootBrowser::CreateBrowser(const char* name)
{
 
   /// Create the actual interface.
 
   fVf = new TGVerticalFrame(this, 100, 100);
 
   fLH0 = new TGLayoutHints(kLHintsNormal);
   fLH1 = new TGLayoutHints(kLHintsTop | kLHintsLeft, 0, 4, 0, 0);
   fLH2 = new TGLayoutHints(kLHintsTop | kLHintsExpandX, 0, 0, 1, 1);
   fLH3 = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsExpandX);
   fLH4 = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsExpandX | kLHintsExpandY, 2, 2, 2, 2);
   fLH5 = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsExpandX | kLHintsExpandY);
   fLH6 = new TGLayoutHints(kLHintsBottom | kLHintsExpandX);
   fLH7 = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsExpandY);
 
   // Menubar Frame
   fTopMenuFrame = new TGHorizontalFrame(fVf, 100, 20);
 
   fPreMenuFrame = new TGHorizontalFrame(fTopMenuFrame, 0, 20, kRaisedFrame);
   fMenuBar      = new TGMenuBar(fPreMenuFrame, 10, 10, kHorizontalFrame);
   fMenuFile     = new TGPopupMenu(gClient->GetDefaultRoot());
   fMenuFile->AddEntry("&Browse...\tCtrl+B", static_cast<int>(ENewBrowserMessages::kBrowse));
   fMenuFile->AddEntry("&Open...\tCtrl+O", static_cast<int>(ENewBrowserMessages::kOpenFile));
   fMenuFile->AddSeparator();
 
   fMenuHelp = new TGPopupMenu(fClient->GetRoot());
   fMenuHelp->AddEntry("&About ROOT...", static_cast<int>(ENewBrowserMessages::kHelpAbout));
   fMenuHelp->AddSeparator();
   fMenuHelp->AddEntry("Help On Browser...", static_cast<int>(ENewBrowserMessages::kHelpOnBrowser));
   fMenuHelp->AddEntry("Help On Canvas...", static_cast<int>(ENewBrowserMessages::kHelpOnCanvas));
   fMenuHelp->AddEntry("Help On Menus...", static_cast<int>(ENewBrowserMessages::kHelpOnMenus));
   fMenuHelp->AddEntry("Help On Graphics Editor...", static_cast<int>(ENewBrowserMessages::kHelpOnGraphicsEd));
   fMenuHelp->AddEntry("Help On Objects...", static_cast<int>(ENewBrowserMessages::kHelpOnObjects));
   fMenuHelp->AddEntry("Help On PostScript...", static_cast<int>(ENewBrowserMessages::kHelpOnPS));
   fMenuHelp->AddEntry("Help On Remote Session...", static_cast<int>(ENewBrowserMessages::kHelpOnRemote));
   fMenuFile->AddPopup("Browser Help...", fMenuHelp);
 
   fMenuFile->AddSeparator();
   fMenuFile->AddEntry("&Clone\tCtrl+N", static_cast<int>(ENewBrowserMessages::kClone));
   fMenuFile->AddSeparator();
   fMenuFile->AddEntry("New &Editor\tCtrl+E", static_cast<int>(ENewBrowserMessages::kNewEditor));
   fMenuFile->AddEntry("New &Canvas\tCtrl+C", static_cast<int>(ENewBrowserMessages::kNewCanvas));
   fMenuFile->AddEntry("New &HTML\tCtrl+H", static_cast<int>(ENewBrowserMessages::kNewHtml));
   fMenuFile->AddSeparator();
   fMenuExecPlugin = new TGPopupMenu(fClient->GetRoot());
   fMenuExecPlugin->AddEntry("&Macro...", static_cast<int>(ENewBrowserMessages::kExecPluginMacro));
   fMenuExecPlugin->AddEntry("&Command...", static_cast<int>(ENewBrowserMessages::kExecPluginCmd));
   fMenuFile->AddPopup("Execute &Plugin...", fMenuExecPlugin);
   fMenuFile->AddSeparator();
   fMenuFile->AddEntry("Close &Tab\tCtrl+T", static_cast<int>(ENewBrowserMessages::kCloseTab));
   fMenuFile->AddEntry("Close &Window\tCtrl+W", static_cast<int>(ENewBrowserMessages::kCloseWindow));
   fMenuFile->AddSeparator();
   fMenuFile->AddEntry("&Quit Root\tCtrl+Q", static_cast<int>(ENewBrowserMessages::kQuitRoot));
   fMenuBar->AddPopup("&Browser", fMenuFile, fLH1);
   fMenuFile->Connect("Activated(Int_t)", "GRootBrowser", this, "HandleMenu(Int_t)");
   fPreMenuFrame->AddFrame(fMenuBar, fLH2);
   fTopMenuFrame->AddFrame(fPreMenuFrame, fLH0);
 
   fMenuFrame = new TGHorizontalFrame(fTopMenuFrame, 100, 20, kRaisedFrame);
   fTopMenuFrame->AddFrame(fMenuFrame, fLH5);
 
   fVf->AddFrame(fTopMenuFrame, fLH3);
   fActMenuBar = fMenuBar;
 
   // Toolbar Frame
   fToolbarFrame = new TGHorizontalFrame(fVf, 100, 20, kHorizontalFrame | kRaisedFrame);
   fVf->AddFrame(fToolbarFrame, fLH3);
 
   fHf = new TGHorizontalFrame(fVf, 100, 100);
// Tabs & co...
#if defined(R__HAS_COCOA)
   fV1 = new TGVerticalFrame(fHf, 252, 100, kFixedWidth);
#else
   fV1 = new TGVerticalFrame(fHf, 250, 100, kFixedWidth);
#endif
   fV2 = new TGVerticalFrame(fHf, 600, 100);
   fH1 = new TGHorizontalFrame(fV2, 100, 100);
   fH2 = new TGHorizontalFrame(fV2, 100, 100, kFixedHeight);
 
   // Left tab
   fTabLeft = new TGTab(fV1, 100, 100);
   // fTabLeft->AddTab("Tab 1");
   fTabLeft->Resize(fTabLeft->GetDefaultSize());
   fV1->AddFrame(fTabLeft, fLH4);
 
   // Vertical splitter
   fVSplitter = new TGVSplitter(fHf, 4, 4);
   fVSplitter->SetFrame(fV1, kTRUE);
   fHf->AddFrame(fV1, fLH7);
   fHf->AddFrame(fVSplitter, fLH7);
 
   // Right tab
   fTabRight = new TGTab(fH1, 500, 100);
   // fTabRight->AddTab("Tab 1");
   fTabRight->Resize(fTabRight->GetDefaultSize());
   fH1->AddFrame(fTabRight, fLH5);
   fTabRight->Connect("Selected(Int_t)", "GRootBrowser", this, "DoTab(Int_t)");
   fTabRight->Connect("CloseTab(Int_t)", "GRootBrowser", this, "CloseTab(Int_t)");
   fV2->AddFrame(fH1, fLH4);
 
   // Horizontal splitter
   fHSplitter = new TGHSplitter(fV2, 4, 4);
   fV2->AddFrame(fHSplitter, fLH3);
 
   // Bottom tab
   fTabBottom = new TGTab(fH2, 100, 100);
   // fTabBottom->AddTab("Tab 1");
   fH2->AddFrame(fTabBottom, fLH4);
   fV2->AddFrame(fH2, fLH3);
 
   fHSplitter->SetFrame(fH2, kFALSE);
   fHf->AddFrame(fV2, fLH5);
   fVf->AddFrame(fHf, fLH5);
   AddFrame(fVf, fLH5);
 
   // status bar
   fStatusBar               = new TGStatusBar(this, 400, 20);
   std::array<int, 4> parts = {33, 10, 10, 47};
   fStatusBar->SetParts(parts.data(), 4);
   AddFrame(fStatusBar, fLH6);
 
   fNbInitPlugins = 0;
   fEditFrame     = nullptr;
   fEditTab       = nullptr;
   fEditPos       = -1;
   fEditSubPos    = -1;
   fNbTab[0] = fNbTab[1] = fNbTab[2] = 0;
   fCrTab[0] = fCrTab[1] = fCrTab[2] = -1;
 
   // Set a name to the main frame
   SetWindowName(name);
   SetIconName(name);
   fIconPic = SetIconPixmap("rootdb_s.xpm");
   SetClassHints("ROOT", "Browser");
 
   if(strcmp(gROOT->GetDefCanvasName(), "c1") == 0) {
      gROOT->SetDefCanvasName("Canvas_1");
   }
 
   SetWMSizeHints(600, 350, 10000, 10000, 2, 2);
   MapSubwindows();
   Resize(GetDefaultSize());
   AddInput(kKeyPressMask | kKeyReleaseMask);
 
   fVf->HideFrame(fToolbarFrame);
}
 
//______________________________________________________________________________
GRootBrowser::~GRootBrowser()
{
   /// Clean up all widgets, frames and layouthints that were used
   std::cout << __PRETTY_FUNCTION__ << std::endl;   // NOLINT(cppcoreguidelines-pro-type-const-cast, cppcoreguidelines-pro-bounds-array-to-pointer-decay)
   fflush(stdout);
 
   if(fIconPic != nullptr) {
      gClient->FreePicture(fIconPic);
   }
   delete fLH0;
   delete fLH1;
   delete fLH2;
   delete fLH3;
   delete fLH4;
   delete fLH5;
   delete fLH6;
   delete fLH7;
   delete fMenuHelp;
   delete fMenuExecPlugin;
   delete fMenuFile;
   delete fMenuBar;
   delete fMenuFrame;
   delete fPreMenuFrame;
   delete fTopMenuFrame;
   delete fToolbarFrame;
   delete fVSplitter;
   delete fHSplitter;
   delete fTabLeft;
   delete fTabRight;
   delete fTabBottom;
   delete fH1;
   delete fH2;
   delete fV1;
   delete fV2;
   delete fHf;
   delete fStatusBar;
   delete fVf;
}
 
//______________________________________________________________________________
void GRootBrowser::Add(TObject* obj, const char* name, Int_t check)
{
   /// Add items to the actual browser. This function has to be called
   /// by the Browse() member function of objects when they are
   /// called by a browser. If check < 0 (default) no check box is drawn,
   /// if 0 then unchecked checkbox is added, if 1 checked checkbox is added.
 
   if(obj->InheritsFrom("TObjectSpy")) {
      return;
   }
   if(obj->InheritsFrom("TKey")) {
      if(strcmp((static_cast<TKey*>(obj))->GetClassName(), "TChannel") == 0) {
         (static_cast<TKey*>(obj))->ReadObj();
      }
   }
   if(fActBrowser != nullptr) {
      fActBrowser->Add(obj, name, check);
   }
}
 
//______________________________________________________________________________
void GRootBrowser::BrowseObj(TObject* obj)
{
   /// Browse object. This, in turn, will trigger the calling of
   /// GRootBrowser::Add() which will fill the IconBox and the tree.
   /// Emits signal "BrowseObj(TObject*)".
 
   if(fActBrowser != nullptr) {
      fActBrowser->BrowseObj(obj);
   }
   Emit("BrowseObj(TObject*)", reinterpret_cast<Long_t>(obj));
}
 
//______________________________________________________________________________
void GRootBrowser::CloneBrowser()
{
   /// Clone the browser. A new Browser will be created, with the same
   /// plugins executed in the current one.
 
   Int_t           loop    = 1;
   GBrowserPlugin* plugin  = nullptr;
   auto*           browser = new TBrowser();
   TIter           next(&fPlugins);
   while((plugin = static_cast<GBrowserPlugin*>(next())) != nullptr) {
      if(loop > fNbInitPlugins) {
         browser->ExecPlugin(plugin->GetName(), "", plugin->fCommand.Data(), plugin->fTab, plugin->fSubTab);
      }
      ++loop;
   }
}
 
//______________________________________________________________________________
void GRootBrowser::CloseTab(Int_t id)
{
   /// Remove tab element id from right tab.
 
   RemoveTab(static_cast<Int_t>(EInsertPosition::kRight), id);
}
 
//______________________________________________________________________________
void GRootBrowser::CloseTabs()
{
   /// Properly close the mainframes embedded in the different tabs
 
   Disconnect(fMenuFile, "Activated(Int_t)", this, "HandleMenu(Int_t)");
   Disconnect(fTabRight, "Selected(Int_t)", this, "DoTab(Int_t)");
   if(fPlugins.IsEmpty()) {
      return;
   }
   fActBrowser = nullptr;
   for(Int_t i = 0; i < fTabLeft->GetNumberOfTabs(); i++) {
      TGCompositeFrame* container = fTabLeft->GetTabContainer(i);
      if(container == nullptr) {
         continue;
      }
      auto* element = static_cast<TGFrameElement*>(container->GetList()->First());
      if((element != nullptr) && (element->fFrame != nullptr)) {
         element->fFrame->SetFrameElement(nullptr);
         if(element->fFrame->InheritsFrom("TVirtualPadEditor")) {
            TVirtualPadEditor::Terminate();
         } else if(element->fFrame->InheritsFrom("TGMainFrame")) {
            (static_cast<TGMainFrame*>(element->fFrame))->CloseWindow();
            gSystem->ProcessEvents();
         } else {
            delete element->fFrame;
         }
         element->fFrame = nullptr;
         if((element->fLayout != nullptr) && (element->fLayout != fgDefaultHints) && (element->fLayout->References() > 0)) {
            element->fLayout->RemoveReference();
            if(element->fLayout->References() == 0u) {
               delete element->fLayout;
            }
         }
         container->GetList()->Remove(element);
         delete element;
      }
   }
   for(Int_t i = 0; i < fTabRight->GetNumberOfTabs(); i++) {
      TGCompositeFrame* container = fTabRight->GetTabContainer(i);
      if(container == nullptr) {
         continue;
      }
      auto* element = static_cast<TGFrameElement*>(container->GetList()->First());
      if((element != nullptr) && (element->fFrame != nullptr)) {
         element->fFrame->SetFrameElement(nullptr);
         if(element->fFrame->InheritsFrom("TGMainFrame")) {
            Bool_t sleep = (element->fFrame->InheritsFrom("GRootCanvas")) ? kTRUE : kFALSE;
            static_cast<TGMainFrame*>(element->fFrame)->CloseWindow();
            if(sleep) {
               gSystem->Sleep(150);
            }
            gSystem->ProcessEvents();
         } else {
            delete element->fFrame;
         }
         element->fFrame = nullptr;
         if((element->fLayout != nullptr) && (element->fLayout != fgDefaultHints) && (element->fLayout->References() > 0)) {
            element->fLayout->RemoveReference();
            if(element->fLayout->References() == 0u) {
               delete element->fLayout;
            }
         }
         container->GetList()->Remove(element);
         delete element;
      }
   }
   for(Int_t i = 0; i < fTabBottom->GetNumberOfTabs(); i++) {
      TGCompositeFrame* container = fTabBottom->GetTabContainer(i);
      if(container == nullptr) {
         continue;
      }
      auto* element = static_cast<TGFrameElement*>(container->GetList()->First());
      if((element != nullptr) && (element->fFrame != nullptr)) {
         element->fFrame->SetFrameElement(nullptr);
         if(element->fFrame->InheritsFrom("TGMainFrame")) {
            (static_cast<TGMainFrame*>(element->fFrame))->CloseWindow();
            gSystem->ProcessEvents();
         } else {
            delete element->fFrame;
         }
         element->fFrame = nullptr;
         if((element->fLayout != nullptr) && (element->fLayout != fgDefaultHints) && (element->fLayout->References() > 0)) {
            element->fLayout->RemoveReference();
            if(element->fLayout->References() == 0u) {
               delete element->fLayout;
            }
         }
         container->GetList()->Remove(element);
         delete element;
      }
   }
   fPlugins.Delete();
   Emit("CloseWindow()");
}
 
//______________________________________________________________________________
void GRootBrowser::CloseWindow()
{
   /// Called when window is closed via the window manager.
 
   TQObject::Disconnect("TCanvas", "ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", this,
                        "EventInfo(Int_t, Int_t, Int_t, TObject*)");
   CloseTabs();
   DeleteWindow();
}
 
//______________________________________________________________________________
void GRootBrowser::DoTab(Int_t id)
{
   /// Handle Tab navigation.
 
   auto* sender = reinterpret_cast<TGTab*>(gTQSender);
   if(sender != nullptr && sender == fTabRight) {
      SwitchMenus(sender->GetTabContainer(id));
   }
}
 
//______________________________________________________________________________
void GRootBrowser::EventInfo(Int_t event, Int_t px, Int_t py, TObject* selected)
{
   /// Display a tooltip with infos about the primitive below the cursor.
 
   const Int_t                    kTMAX = 256;
   static std::array<char, kTMAX> atext;
   if(selected == nullptr || event == kMouseLeave) {
      SetStatusText("", 0);
      SetStatusText("", 1);
      SetStatusText("", 2);
      SetStatusText("", 3);
      return;
   }
   SetStatusText(selected->GetTitle(), 0);
   SetStatusText(selected->GetName(), 1);
   if(event == kKeyPress) {
      snprintf(atext.data(), atext.size(), "%c", static_cast<char>(px));
   } else {
      snprintf(atext.data(), atext.size(), "%d,%d", px, py);
   }
   SetStatusText(atext.data(), 2);
   SetStatusText(selected->GetObjectInfo(px, py), 3);
}
 
//______________________________________________________________________________
Long_t GRootBrowser::ExecPlugin(const char* name, const char* fname, const char* cmd, Int_t pos, Int_t subpos)
{
   /// Execute a macro and embed the created frame in the tab "pos"
   /// and tab element "subpos".
 
   Long_t  retval = 0;
   TString command;
   TString pname;
   StartEmbedding(pos, subpos);
   if(cmd != nullptr && strlen(cmd) != 0u) {
      command = cmd;
      if(name != nullptr) {
         pname = name;
      } else {
         pname = TString::Format("Plugin %d", fPlugins.GetSize());
      }
   } else if(fname != nullptr && strlen(fname) != 0u) {
      pname          = name != nullptr ? name : gSystem->BaseName(fname);
      Ssiz_t lastDot = pname.Last('.');
      if(lastDot > 0) {
         pname.Remove(lastDot);
      }
      command.Form(R"(gROOT->Macro("%s");)", gSystem->UnixPathName(fname));
   } else {
      return 0;
   }
   auto* plugin = new GBrowserPlugin(pname.Data(), command.Data(), pos, subpos);
   fPlugins.Add(plugin);
   retval = gROOT->ProcessLine(command.Data());
   if(command.Contains("new TCanvas")) {
      pname = gPad->GetName();
      plugin->SetName(pname.Data());
   }
   SetTabTitle(pname.Data(), pos, subpos);
   StopEmbedding();
   return retval;
}
 
//______________________________________________________________________________
Option_t* GRootBrowser::GetDrawOption() const
{
   /// Returns drawing option.
 
   if(fActBrowser != nullptr) {
      return fActBrowser->GetDrawOption();
   }
   return nullptr;
}
 
//______________________________________________________________________________
TGTab* GRootBrowser::GetTab(Int_t pos) const
{
   /// Returns the TGTab at position pos.
 
   switch(static_cast<EInsertPosition>(pos)) {
   case EInsertPosition::kLeft: return fTabLeft;
   case EInsertPosition::kRight: return fTabRight;
   case EInsertPosition::kBottom: return fTabBottom;
   default: return nullptr;
   }
}
 
//______________________________________________________________________________
Bool_t GRootBrowser::HandleKey(Event_t* event)
{
   /// Handle keyboard events.
 
   std::array<char, 10> input{};
 
   if(event->fType == kGKeyPress) {
      UInt_t keysym = 0;
      gVirtualX->LookupString(event, input.data(), input.size(), keysym);
 
      if((event->fState == 0u) && static_cast<EKeySym>(keysym) == kKey_F5) {
         Refresh(kTRUE);
         return kTRUE;
      }
      switch(static_cast<EKeySym>(keysym)) {   // ignore these keys
      case kKey_Shift:
      case kKey_Control:
      case kKey_Meta:
      case kKey_Alt:
      case kKey_CapsLock:
      case kKey_NumLock:
      case kKey_ScrollLock: return kTRUE;
      default: break;
      }
      if((event->fState & kKeyControlMask) != 0u) {       // Cntrl key modifier pressed
         switch(static_cast<EKeySym>(keysym) & ~0x20) {   // treat upper and lower the same
         case kKey_B: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kBrowse)); return kTRUE;
         case kKey_O: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kOpenFile)); return kTRUE;
         case kKey_E: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kNewEditor)); return kTRUE;
         case kKey_C: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kNewCanvas)); return kTRUE;
         case kKey_H: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kNewHtml)); return kTRUE;
         case kKey_N: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kClone)); return kTRUE;
         case kKey_T: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kCloseTab)); return kTRUE;
         case kKey_W: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kCloseWindow)); return kTRUE;
         case kKey_Q: fMenuFile->Activated(static_cast<int>(ENewBrowserMessages::kQuitRoot)); return kTRUE;
         default: break;
         }
      }
   }
   return TGMainFrame::HandleKey(event);
}
 
//______________________________________________________________________________
void GRootBrowser::HandleMenu(Int_t id)
{
   /// Handle menu entries events.
 
   TRootHelpDialog* helperDialog = nullptr;
   TString          cmd;
   static Int_t     eNr    = 1;
   auto*            sender = reinterpret_cast<TGPopupMenu*>(gTQSender);
   if(sender != fMenuFile) {
      return;
   }
   switch(static_cast<ENewBrowserMessages>(id)) {
   case ENewBrowserMessages::kBrowse: new TBrowser(); break;
   case ENewBrowserMessages::kOpenFile: {
      Bool_t         newfile = kFALSE;
      static TString dir(".");
      TGFileInfo     fileInfo;
      fileInfo.fFileTypes = gOpenFileTypes.data();
      fileInfo.fIniDir    = StrDup(dir);
      new TGFileDialog(gClient->GetDefaultRoot(), this, kFDOpen, &fileInfo);
      dir = fileInfo.fIniDir;
      if(fileInfo.fMultipleSelection && (fileInfo.fFileNamesList != nullptr)) {
         TObjString* element = nullptr;
         TIter       next(fileInfo.fFileNamesList);
         while((element = static_cast<TObjString*>(next())) != nullptr) {
            gROOT->ProcessLine(Form(R"(new TFile("%s");)", gSystem->UnixPathName(element->GetString())));
         }
         newfile = kTRUE;
      } else if(fileInfo.fFilename != nullptr) {
         gROOT->ProcessLine(Form(R"(new TFile("%s");)", gSystem->UnixPathName(fileInfo.fFilename)));
         newfile = kTRUE;
      }
      if((fActBrowser != nullptr) && newfile) {
         auto* fileBrowser = static_cast<TGFileBrowser*>(fActBrowser);
         if(fileBrowser != nullptr) {
            fileBrowser->Selected(nullptr);
         }
      }
   } break;
      // Handle Help menu items...
   case ENewBrowserMessages::kHelpAbout: {
#ifdef R__UNIX
      TString rootx;
#ifdef ROOTBINDIR
      rootx = ROOTBINDIR;
#else
      rootx = gSystem->Getenv("ROOTSYS");
      if(!rootx.IsNull()) {
         rootx += "/bin";
      }
#endif   // ROOTBINDIR
      rootx += "/root -a &";
      gSystem->Exec(rootx);
#else   // R__UNIX
#ifdef WIN32
      new TWin32SplashThread(kTRUE);
#else
      std::ostringstream str;
      str << "About ROOT " << gROOT->GetVersion() << "...";
      helperDialog = new TRootHelpDialog(this, str.str(), 600, 400);
      helperDialog->SetText(gHelpAbout);
      helperDialog->Popup();
#endif   // WIN32
#endif   // R__UNIX
   } break;
   case ENewBrowserMessages::kHelpOnCanvas:
      helperDialog = new TRootHelpDialog(this, "Help on Canvas...", 600, 400);
      helperDialog->SetText(gHelpCanvas);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnMenus:
      helperDialog = new TRootHelpDialog(this, "Help on Menus...", 600, 400);
      helperDialog->SetText(gHelpPullDownMenus);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnGraphicsEd:
      helperDialog = new TRootHelpDialog(this, "Help on Graphics Editor...", 600, 400);
      helperDialog->SetText(gHelpGraphicsEditor);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnBrowser:
      helperDialog = new TRootHelpDialog(this, "Help on Browser...", 600, 400);
      helperDialog->SetText(gHelpBrowser);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnObjects:
      helperDialog = new TRootHelpDialog(this, "Help on Objects...", 600, 400);
      helperDialog->SetText(gHelpObjects);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnPS:
      helperDialog = new TRootHelpDialog(this, "Help on PostScript...", 600, 400);
      helperDialog->SetText(gHelpPostscript);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kHelpOnRemote:
      helperDialog = new TRootHelpDialog(this, "Help on Browser...", 600, 400);
      helperDialog->SetText(gHelpRemote);   // NOLINT(cppcoreguidelines-pro-bounds-array-to-pointer-decay)
      helperDialog->Popup();
      break;
   case ENewBrowserMessages::kClone: CloneBrowser(); break;
   case ENewBrowserMessages::kNewEditor:
      cmd.Form("new TGTextEditor((const char *)0, gClient->GetRoot())");
      ++eNr;
      ExecPlugin(Form("Editor %d", eNr), "", cmd.Data(), 1);
      break;
   case ENewBrowserMessages::kNewCanvas: ExecPlugin("", "", "new TCanvas()", 1); break;
   case ENewBrowserMessages::kNewHtml:
      cmd.Form(R"(new TGHtmlBrowser("%s", gClient->GetRoot()))",
               gEnv->GetValue("Browser.StartUrl", "http://root.cern.ch"));
      ExecPlugin("HTML", "", cmd.Data(), 1);
      break;
   case ENewBrowserMessages::kExecPluginMacro: {
      static TString dir(".");
      TGFileInfo     fileInfo;
      fileInfo.fFileTypes = gPluginFileTypes.data();
      fileInfo.fIniDir    = StrDup(dir);
      new TGFileDialog(gClient->GetDefaultRoot(), this, kFDOpen, &fileInfo);
      dir = fileInfo.fIniDir;
      if(fileInfo.fFilename != nullptr) {
         ExecPlugin(nullptr, fileInfo.fFilename, nullptr, static_cast<Int_t>(EInsertPosition::kRight));
      }
   } break;
   case ENewBrowserMessages::kExecPluginCmd: {
      std::array<char, 1024> command{};
      strlcpy(command.data(), "new TGLSAViewer(gClient->GetRoot(), 0);", command.size());
      new TGInputDialog(gClient->GetRoot(), this, "Enter plugin command line:", command.data(), command.data());
      if(strcmp(command.data(), "") != 0) {
         ExecPlugin("User", nullptr, command.data(), static_cast<Int_t>(EInsertPosition::kRight));
      }
   } break;
   case ENewBrowserMessages::kCloseTab: CloseTab(fTabRight->GetCurrent()); break;
   case ENewBrowserMessages::kCloseWindow: CloseWindow(); break;
   case ENewBrowserMessages::kQuitRoot:
      CloseWindow();
      gApplication->Terminate(0);
      break;
   default: break;
   }
}
 
//______________________________________________________________________________
void GRootBrowser::InitPlugins(Option_t* opt)
{
   /// Initialize default plugins. Could be also of the form:
   ///~~~
   /// StartEmbedding(0);
   /// TPluginHandler *ph;
   /// ph = gROOT->GetPluginManager()->FindHandler("TGClassBrowser");
   /// if (ph && ph->LoadPlugin() != -1) {
   ///    ph->ExecPlugin(3, gClient->GetRoot(), 200, 500);
   /// }
   /// StopEmbedding();
   ///~~~
 
   TString cmd;
 
   if((opt == nullptr) || (strlen(opt) == 0)) {
      return;
   }
   // --- Left vertical area
 
   // File Browser plugin
   if(strchr(opt, 'F') != nullptr) {
      cmd.Form("new TGFileBrowser(gClient->GetRoot(), (TBrowser *)0x%lx, 200, 500);", reinterpret_cast<ULong_t>(fBrowser));
      ExecPlugin("Files", nullptr, cmd.Data(), 0);
      ++fNbInitPlugins;
   }
 
   // --- Right main area
 
   unsigned int len = strlen(opt);
   for(unsigned int i = 0; i < len; ++i) {
      // Editor plugin...
      if(opt[i] == 'E') {
         cmd.Form("new TGTextEditor((const char *)0, gClient->GetRoot());");
         ExecPlugin("Editor 1", nullptr, cmd.Data(), 1);
         ++fNbInitPlugins;
      }
 
      // HTML plugin...
      if(opt[i] == 'H') {
         if(gSystem->Load("libGuiHtml") >= 0) {
            cmd.Form(R"(new TGHtmlBrowser("%s", gClient->GetRoot());)",
                     gEnv->GetValue("Browser.StartUrl", "http://root.cern.ch/root/html/ClassIndex.html"));
            ExecPlugin("HTML", nullptr, cmd.Data(), 1);
            ++fNbInitPlugins;
         }
      }
 
      // Canvas plugin...
      if(opt[i] == 'C') {
         fflush(stdout);
         cmd.Form("new TCanvas();");
         ExecPlugin("c1", nullptr, cmd.Data(), 1);
         ++fNbInitPlugins;
      }
 
      // GLViewer plugin...
      if(opt[i] == 'G') {
         cmd.Form("new TGLSAViewer(gClient->GetRoot(), 0);");
         ExecPlugin("OpenGL", nullptr, cmd.Data(), 1);
         ++fNbInitPlugins;
      }
 
      // PROOF plugin...
      if(opt[i] == 'P') {
         cmd.Form("new TSessionViewer();");
         ExecPlugin("PROOF", nullptr, cmd.Data(), 1);
         ++fNbInitPlugins;
      }
   }
   // --- Right bottom area
 
   // Command plugin...
   if(strchr(opt, 'I') != nullptr) {
      cmd.Form("new TGCommandPlugin(gClient->GetRoot(), 700, 300);");
      ExecPlugin("Command", nullptr, cmd.Data(), 2);
      ++fNbInitPlugins;
   }
 
   // --- Select first tab everywhere
   SetTab(0, 0);
   SetTab(1, 0);
   SetTab(2, 0);
}
 
//______________________________________________________________________________
void GRootBrowser::ReallyDelete()
{
   /// Really delete the browser and the this GUI.
 
   gInterpreter->DeleteGlobal(fBrowser);
   delete fBrowser;   // will in turn delete this object
}
 
//______________________________________________________________________________
void GRootBrowser::RecursiveRemove(TObject* obj)
{
   /// Recursively remove object from browser.
 
   if(fActBrowser != nullptr) {
      fActBrowser->RecursiveRemove(obj);
   }
}
 
//______________________________________________________________________________
void GRootBrowser::RecursiveReparent(TGPopupMenu* popup)
{
   /// Recursively reparent TGPopupMenu to gClient->GetDefaultRoot().
 
   TGMenuEntry* entry = nullptr;
   TIter        next(popup->GetListOfEntries());
   while((entry = static_cast<TGMenuEntry*>(next())) != nullptr) {
      if(entry->GetPopup() != nullptr) {
         RecursiveReparent(entry->GetPopup());
      }
   }
   popup->ReparentWindow(gClient->GetDefaultRoot());
}
 
//______________________________________________________________________________
void GRootBrowser::Refresh(Bool_t force)
{
   /// Refresh the actual browser contents.
 
   if(fActBrowser != nullptr) {
      fActBrowser->Refresh(force);
   }
}
 
//______________________________________________________________________________
void GRootBrowser::RemoveTab(Int_t pos, Int_t subpos)
{
   /// Remove tab element "subpos" from tab "pos".
 
   TGTab* edit = nullptr;
   switch(static_cast<EInsertPosition>(pos)) {
   case EInsertPosition::kLeft:   // left
      edit = fTabLeft;
      break;
   case EInsertPosition::kRight:   // right
      edit = fTabRight;
      fMenuFrame->HideFrame(fActMenuBar);
      fMenuFrame->GetList()->Remove(fActMenuBar);
      fActMenuBar = nullptr;
      break;
   case EInsertPosition::kBottom:   // bottom
      edit = fTabBottom;
      break;
   }
   if((edit == nullptr) || (edit->GetTabTab(subpos) == nullptr)) {
      return;
   }
   const char* tabName = edit->GetTabTab(subpos)->GetString();
   TObject*    obj     = nullptr;
   if((obj = fPlugins.FindObject(tabName)) != nullptr) {
      fPlugins.Remove(obj);
   }
   TGFrameElement* element = nullptr;
   if(edit->GetTabContainer(subpos) != nullptr) {
      element = static_cast<TGFrameElement*>(edit->GetTabContainer(subpos)->GetList()->First());
   }
   if(element != nullptr && element->fFrame != nullptr) {
      element->fFrame->Disconnect("ProcessedConfigure(Event_t*)");
      element->fFrame->SetFrameElement(nullptr);
      if(element->fFrame->InheritsFrom("TGMainFrame")) {
         Bool_t sleep = (element->fFrame->InheritsFrom("GRootCanvas")) ? kTRUE : kFALSE;
         static_cast<TGMainFrame*>(element->fFrame)->CloseWindow();
         if(sleep) {
            gSystem->Sleep(150);
         }
         gSystem->ProcessEvents();
      } else {
         delete element->fFrame;
      }
      element->fFrame = nullptr;
      if(element->fLayout != nullptr && element->fLayout != fgDefaultHints && element->fLayout->References() > 0) {
         element->fLayout->RemoveReference();
         if(element->fLayout->References() == 0u) {
            delete element->fLayout;
         }
      }
      edit->GetTabContainer(subpos)->GetList()->Remove(element);
      delete element;
   }
   fNbTab[pos]--;
   edit->RemoveTab(subpos);
   SwitchMenus(edit->GetTabContainer(edit->GetCurrent()));
}
 
//______________________________________________________________________________
void GRootBrowser::SetTab(Int_t pos, Int_t subpos)
{
   /// Switch to Tab "subpos" in TGTab "pos".
 
   TGTab* tab = GetTab(pos);
   if(subpos == -1) {
      subpos = fCrTab[pos];
   }
 
   if((tab != nullptr) && tab->SetTab(subpos, kFALSE)) {   // Block signal emit
      if(static_cast<EInsertPosition>(pos) == EInsertPosition::kRight) {
         SwitchMenus(tab->GetTabContainer(subpos));
      }
      tab->Layout();
   }
}
 
//______________________________________________________________________________
void GRootBrowser::SetTabTitle(const char* title, Int_t pos, Int_t subpos)
{
   /// Set text "title" of Tab "subpos" in TGTab "pos".
 
   TGTab* edit = GetTab(pos);
   if(edit == nullptr) {
      return;
   }
   if(subpos == -1) {
      subpos = fCrTab[pos];
   }
 
   TGTabElement* element = edit->GetTabTab(subpos);
   if(element != nullptr) {
      element->SetText(new TGString(title));
      edit->Layout();
      GBrowserPlugin* plugin = nullptr;
      if((plugin = static_cast<GBrowserPlugin*>(fPlugins.FindObject(title))) != nullptr) {
         plugin->SetName(title);
      }
   }
}
 
//______________________________________________________________________________
void GRootBrowser::SetStatusText(const char* txt, Int_t col)
{
   /// Set text in culumn col in status bar.
 
   fStatusBar->SetText(txt, col);
}
 
//______________________________________________________________________________
void GRootBrowser::ShowMenu(TGCompositeFrame* menu)
{
   /// Show the selected frame's menu and hide previous one.
 
   TGFrameElement* element = nullptr;
   // temporary solution until I find a proper way to handle
   // these bloody menus...
   fBindList->Delete();
   TIter nextm(fMenuBar->GetList());
   while((element = static_cast<TGFrameElement*>(nextm())) != nullptr) {
      auto* title = static_cast<TGMenuTitle*>(element->fFrame);
      Int_t code  = title->GetHotKeyCode();
      BindKey(fMenuBar, code, kKeyMod1Mask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyShiftMask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyLockMask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyShiftMask | kKeyLockMask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyMod2Mask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyShiftMask | kKeyMod2Mask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyMod2Mask | kKeyLockMask);
      BindKey(fMenuBar, code, kKeyMod1Mask | kKeyShiftMask | kKeyMod2Mask | kKeyLockMask);
   }
   fMenuFrame->HideFrame(fActMenuBar);
   fMenuFrame->ShowFrame(menu);
   menu->Layout();
   fMenuFrame->Layout();
   fActMenuBar = menu;
}
 
//______________________________________________________________________________
void GRootBrowser::StartEmbedding(Int_t pos, Int_t subpos)
{
   /// Start embedding external frame in the tab "pos" and tab element "subpos".
 
   fEditTab = GetTab(pos);
   if(fEditTab == nullptr) {
      return;
   }
   fEditPos    = pos;
   fEditSubPos = subpos;
 
   if(fEditFrame == nullptr) {
      if(subpos == -1) {
         fCrTab[pos] = fNbTab[pos]++;
         fEditFrame  = fEditTab->AddTab(Form("Tab %d", fNbTab[pos]));
         fEditSubPos = fEditTab->GetNumberOfTabs() - 1;
         fEditFrame->MapWindow();
         TGTabElement* tabel = fEditTab->GetTabTab(fEditSubPos);
         if(tabel != nullptr) {
            tabel->MapWindow();
            if(fShowCloseTab && (pos == 1)) {
               tabel->ShowClose();
            }
         }
         fEditTab->SetTab(fEditTab->GetNumberOfTabs() - 1);
         fEditTab->Layout();
      } else {
         fCrTab[pos] = subpos;
         fEditFrame  = fEditTab->GetTabContainer(subpos);
         fEditTab->SetTab(subpos);
      }
      if(fEditFrame != nullptr) {
         fEditFrame->SetEditable();
      }
   }
}
 
//______________________________________________________________________________
void GRootBrowser::StopEmbedding(const char* name, TGLayoutHints* layout)
{
   /// Stop embedding external frame in the current editable frame.
 
   if(fEditFrame != nullptr) {
      fEditFrame->SetEditable(kFALSE);
      auto* element = static_cast<TGFrameElement*>(fEditFrame->GetList()->First());
      if((element != nullptr) && (element->fFrame != nullptr)) {
         // let be notified when the inside frame gets resized, and tell its
         // container to recompute its layout
         element->fFrame->Connect("ProcessedConfigure(Event_t*)", "TGCompositeFrame", fEditFrame, "Layout()");
      }
      if(layout != nullptr) {
         element = static_cast<TGFrameElement*>(fEditFrame->GetList()->Last());
         // !!!! MT what to do with the old layout? Leak it for now ...
         if(element != nullptr) {
            element->fLayout = layout;
         }
      }
      fEditFrame->Layout();
      if(fEditTab == fTabRight) {
         SwitchMenus(fEditFrame);
      }
   }
   if((name != nullptr) && (strlen(name) != 0u)) {
      SetTabTitle(name, fEditPos, fEditSubPos);
   }
   fEditTab->Selected(fEditSubPos);
   fEditFrame = fEditTab = nullptr;
   fEditPos = fEditSubPos = -1;
}
 
//______________________________________________________________________________
void GRootBrowser::SwitchMenus(TGCompositeFrame* from)
{
   /// Move the menu from original frame to our TGMenuFrame, or display the
   /// menu associated to the current tab.
 
   if(from == nullptr) {
      return;
   }
   auto* frameElement = static_cast<TGFrameElement*>(from->GetList()->First());
   if(frameElement == nullptr) {
      if(fActMenuBar != fMenuBar) {
         ShowMenu(fMenuBar);
      }
      return;
   }
   auto*           embed   = static_cast<TGCompositeFrame*>(frameElement->fFrame);
   TGFrameElement* element = nullptr;
   if(embed != nullptr && embed->GetList() != nullptr) {
      TIter next(embed->GetList());
      while((element = static_cast<TGFrameElement*>(next())) != nullptr) {
         if(element->fFrame->InheritsFrom("TGMenuBar")) {
            auto* menu = static_cast<TGMenuBar*>(element->fFrame);
            if(fActMenuBar == menu) {
               return;
            }
            TGFrameElement* nw = nullptr;
            TIter           nel(fMenuFrame->GetList());
            while((nw = static_cast<TGFrameElement*>(nel())) != nullptr) {
               if(nw->fFrame == menu) {
                  ShowMenu(menu);
                  return;
               }
            }
            const_cast<TGCompositeFrame*>(static_cast<const TGCompositeFrame*>(menu->GetParent()))->HideFrame(menu);          // NOLINT(cppcoreguidelines-pro-type-const-cast)
            const_cast<TGCompositeFrame*>(static_cast<const TGCompositeFrame*>(menu->GetParent()))->SetCleanup(kNoCleanup);   // NOLINT(cppcoreguidelines-pro-type-const-cast)
            menu->ReparentWindow(fMenuFrame);
            fMenuFrame->AddFrame(menu, fLH2);
            TGFrameElement* mel = nullptr;
            TIter           mnext(menu->GetList());
            while((mel = static_cast<TGFrameElement*>(mnext())) != nullptr) {
               auto*        title = static_cast<TGMenuTitle*>(mel->fFrame);
               TGPopupMenu* popup = menu->GetPopup(title->GetName());
               if(popup != nullptr) {
                  RecursiveReparent(popup);
                  if(popup->GetEntry("Close Canvas") != nullptr) {
                     TGMenuEntry* exit = popup->GetEntry("Close Canvas");
                     popup->HideEntry(exit->GetEntryId());
                  }
                  if(popup->GetEntry("Close Viewer") != nullptr) {
                     TGMenuEntry* exit = popup->GetEntry("Close Viewer");
                     popup->HideEntry(exit->GetEntryId());
                  }
                  if(popup->GetEntry("Quit ROOT") != nullptr) {
                     TGMenuEntry* exit = popup->GetEntry("Quit ROOT");
                     popup->HideEntry(exit->GetEntryId());
                  }
                  if(popup->GetEntry("Exit") != nullptr) {
                     TGMenuEntry* exit = popup->GetEntry("Exit");
                     popup->HideEntry(exit->GetEntryId());
                  }
               }
            }
            ShowMenu(menu);
            return;
         }
      }
   }
   if(fActMenuBar != fMenuBar) {
      ShowMenu(fMenuBar);
   }
}
 
//______________________________________________________________________________
void GRootBrowser::DoubleClicked(TObject* obj)
{
   /// Emits signal when double clicking on icon.
   Emit("DoubleClicked(TObject*)", reinterpret_cast<Long_t>(obj));
}
 
//______________________________________________________________________________
void GRootBrowser::Checked(TObject* obj, Bool_t checked)
{
   /// Emits signal when double clicking on icon.
 
   std::array<Long_t, 2> args = {reinterpret_cast<Long_t>(obj), static_cast<Long_t>(checked)};
 
   Emit("Checked(TObject*,Bool_t)", args.data());
}
 
//______________________________________________________________________________
void GRootBrowser::ExecuteDefaultAction(TObject* obj)
{
   /// Emits signal "ExecuteDefaultAction(TObject*)".
   Emit("ExecuteDefaultAction(TObject*)", reinterpret_cast<Long_t>(obj));
}
 
//______________________________________________________________________________
TBrowserImp* GRootBrowser::NewBrowser(TBrowser* b, const char* title, UInt_t width, UInt_t height, Option_t* opt)
{
   /// static contructor returning TBrowserImp,
   /// as needed by the plugin mechanism.
 
   auto* browser = new GRootBrowser(b, title, width, height, opt);
   return static_cast<TBrowserImp*>(browser);
}
 
//______________________________________________________________________________
TBrowserImp* GRootBrowser::NewBrowser(TBrowser* b, const char* title, Int_t x, Int_t y, UInt_t width, UInt_t height, Option_t* opt)
{
   /// static contructor returning TBrowserImp,
   /// as needed by the plugin mechanism.
 
   auto* browser = new GRootBrowser(b, title, x, y, width, height, opt);
   return static_cast<TBrowserImp*>(browser);
}