TGButtonGroup.cxx

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// @(#)root/gui:$Id$
// Author: Valeriy Onuchin & Fons Rademakers   16/10/2000
 
/*************************************************************************
 * 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 TGButtonGroup
    \ingroup guiwidgets
 
Organizes TGButton widgets in a group.
A button group widget makes it easier to deal with groups of buttons.
A button in a button group is associated with a unique identifier.
The button group emits a Clicked() signal with this identifier when
the button is clicked. Thus, a button group is an ideal solution
when you have several similar buttons and want to connect all their
Clicked() signals, for example, to one slot.
 
An exclusive button group switches off all toggle buttons except
the one that was clicked. A button group is by default non-exclusive.
All radio buttons that are inserted, will be mutually exclusive even
if the button group is non-exclusive.
 
 
There are two ways of using a button group:
 
   The button group is a parent widget of a number of buttons,
   i.e. the button group is the parent argument in the button
   constructor. The buttons are assigned identifiers 1, 2, 3 etc.
   in the order they are created or you can specify button id in
   the button constructor. A TGButtonGroup can display a frame and
   a title because it inherits from TGGroupFrame.
 
Example:
 
```
   // vertical frame without border and title
   TGVButtonGroup *bg = new TGVButtonGroup(main_frame);
 
   // create text button with id=1
   TGTextButton *button1 = new TGTextButton(bg,"some text");
 
   // create another text button with id=2
   TGTextButton *button2 = new TGTextButton(bg,"another text");
 
   // map all buttons
   bg->Show();
```
 
NOTE: there is no need to call AddFrame() since the buttons are
automatically added with a default layout hint to their parent,
i.e. the buttongroup. To override the default layout hints use the
SetLayoutHints() method.
 
 ButtonGroup Signals:
 
  - Pressed(Int_t id)  -->  is emitted when a button in the group is
                            pressed down. The id argument is the
                            button's identifier.
  - Released(Int_t id) -->  is emitted when a button in the group is
                            released. The id argument is the button's
                            identifier.
  - Clicked(Int_t id)  -->  is emitted when a button in the group is
                            clicked. The id argument is the button's
                            identifier.
 
 
\class TGHButtonGroup
\ingroup guiwidgets
 
Organizes TGButton widgets in a group with one horizontal row. TGHButtonGroup is a
convenience class that offers a thin layer on top of TGButtonGroup. It inherits from
TGButtonGroup.
 
 
\class TGVButtonGroup
\ingroup guiwidgets
 
Organizes TGButton widgets in a group with one vertical column. TGVButtonGroup is a
convenience class that offers a thin layer on top of TGButtonGroup. It inherits from
TGButtonGroup.
 
*/
 
 
#include "TGButtonGroup.h"
#include "TGButton.h"
#include "TClass.h"
#include "TGLayout.h"
#include "TList.h"
#include "TGResourcePool.h"
#include "TVirtualX.h"
#include "TMap.h"
 
#include <iostream>
 
 
ClassImp(TGButtonGroup);
ClassImp(TGHButtonGroup);
ClassImp(TGVButtonGroup);
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor. Layout 1 row or 1 column.
 
TGButtonGroup::TGButtonGroup(const TGWindow *parent,
                             const TString &title,
                             UInt_t options,
                             GContext_t norm,
                             FontStruct_t font,
                             Pixel_t back) :
   TGGroupFrame(parent, new TGString(title), options, norm, font, back)
{
   Init();
   if (options & kVerticalFrame) {
      SetLayoutManager(new TGVerticalLayout(this));
   } else {
      SetLayoutManager(new TGHorizontalLayout(this));
   }
 
   fDrawBorder = !title.IsNull();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor. Layout defined by TGMatrixLayout:
///    r = number of rows
///    c = number of columns
///    s = interval between frames
///    h = layout hints
 
TGButtonGroup::TGButtonGroup(const TGWindow *parent,
                             UInt_t r, UInt_t c,
                             Int_t s, Int_t h,
                             const TString &title,
                             GContext_t norm ,
                             FontStruct_t font ,
                             Pixel_t back) :
   TGGroupFrame(parent, new TGString(title), 0, norm, font, back)
{
   Init();
   fDrawBorder = !title.IsNull();
   SetLayoutManager(new TGMatrixLayout(this,r,c,s,h));
}
 
////////////////////////////////////////////////////////////////////////////////
/// Default init.
 
void TGButtonGroup::Init()
{
   fState        = kTRUE;
   fMapOfButtons = new TMap();  // map of button/id pairs
   fExclGroup    = kFALSE;
   fRadioExcl    = kFALSE;
   fDrawBorder   = kTRUE;
 
   SetWindowName();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Destructor, we do not delete the buttons.
 
TGButtonGroup::~TGButtonGroup()
{
   TIter next(fMapOfButtons);
   TGButton *item = 0;
 
   while ((item = (TGButton*)next())) {
      item->SetGroup(0);
   }
 
   SafeDelete(fMapOfButtons);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Redraw the group frame. Need special DoRedraw() since we need to
/// redraw with fBorderWidth=0.
 
void TGButtonGroup::DoRedraw()
{
   gVirtualX->ClearArea(fId, 0, 0, fWidth, fHeight);
 
   DrawBorder();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Draw border of around the group frame.
///
/// if frame is kRaisedFrame  - a frame border is of "wall style",
/// otherwise of "groove style".
 
void TGButtonGroup::DrawBorder()
{
   if (!fDrawBorder) return;
 
   Int_t x, y, l, t, r, b, gl, gr, sep, max_ascent, max_descent;
 
   UInt_t tw = gVirtualX->TextWidth(fFontStruct, fText->GetString(), fText->GetLength());
   gVirtualX->GetFontProperties(fFontStruct, max_ascent, max_descent);
 
   l = 0;
   t = (max_ascent + max_descent + 2) >> 1;
   r = fWidth - 1;
   // next three lines are for backward compatibility in case of horizontal layout
   TGLayoutManager * lm = GetLayoutManager();
   // coverity[returned_null]
   // coverity[dereference]
   if ((lm->InheritsFrom(TGHorizontalLayout::Class())) ||
       (lm->InheritsFrom(TGMatrixLayout::Class())))
      b = fHeight - 1;
   else
      b = fHeight - t;
 
   sep = 3;
   UInt_t rr = 5 + (sep << 1) + tw;
 
   switch (fTitlePos) {
      case kRight:
         gl = fWidth>rr ? Int_t(fWidth - rr) : 5 + sep;
         break;
      case kCenter:
         gl = fWidth>tw ? Int_t((fWidth - tw)>>1) - sep : 5 + sep;
         break;
      case kLeft:
      default:
         gl = 5 + sep;
   }
   gr = gl + tw + (sep << 1);
 
   switch (fOptions & (kSunkenFrame | kRaisedFrame)) {
      case kRaisedFrame:
         gVirtualX->DrawLine(fId, GetHilightGC()(),  l,   t,   gl,  t);
         gVirtualX->DrawLine(fId, GetShadowGC()(), l+1, t+1, gl,  t+1);
 
         gVirtualX->DrawLine(fId, GetHilightGC()(),  gr,  t,   r-1, t);
         gVirtualX->DrawLine(fId, GetShadowGC()(), gr,  t+1, r-2, t+1);
 
         gVirtualX->DrawLine(fId, GetHilightGC()(),  r-1, t,   r-1, b-1);
         gVirtualX->DrawLine(fId, GetShadowGC()(), r,   t,   r,   b);
 
         gVirtualX->DrawLine(fId, GetHilightGC()(),  r-1, b-1, l,   b-1);
         gVirtualX->DrawLine(fId, GetShadowGC()(), r,   b,   l,   b);
 
         gVirtualX->DrawLine(fId, GetHilightGC()(),  l,   b-1, l,   t);
         gVirtualX->DrawLine(fId, GetShadowGC()(), l+1, b-2, l+1, t+1);
         break;
      case kSunkenFrame:
      default:
         gVirtualX->DrawLine(fId, GetShadowGC()(),  l,   t,   gl,  t);
         gVirtualX->DrawLine(fId, GetHilightGC()(), l+1, t+1, gl,  t+1);
 
         gVirtualX->DrawLine(fId, GetShadowGC()(),  gr,  t,   r-1, t);
         gVirtualX->DrawLine(fId, GetHilightGC()(), gr,  t+1, r-2, t+1);
 
         gVirtualX->DrawLine(fId, GetShadowGC()(),  r-1, t,   r-1, b-1);
         gVirtualX->DrawLine(fId, GetHilightGC()(), r,   t,   r,   b);
 
         gVirtualX->DrawLine(fId, GetShadowGC()(),  r-1, b-1, l,   b-1);
         gVirtualX->DrawLine(fId, GetHilightGC()(), r,   b,   l,   b);
 
         gVirtualX->DrawLine(fId, GetShadowGC()(),  l,   b-1, l,   t);
         gVirtualX->DrawLine(fId, GetHilightGC()(), l+1, b-2, l+1, t+1);
         break;
   }
 
   x = gl + sep;
   y = 1;
 
   if (fState) {
      fText->Draw(fId, fNormGC, x, y + max_ascent);
   } else {
      fText->Draw(fId, GetHilightGC()(), x, y + 1 + max_ascent);
      fText->Draw(fId, GetShadowGC()(), x, y + max_ascent);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Makes border to be visible/invisible.
 
void TGButtonGroup::SetBorderDrawn(Bool_t enable)
{
   if (enable != IsBorderDrawn()) {
      fDrawBorder = enable;
      ChangedBy("SetBorderDrawn");        // emit signal
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Sets the button group to be exclusive if enable is kTRUE,
/// or to be non-exclusive if enable is kFALSE.
/// An exclusive button group switches off all other toggle buttons when
/// one is switched on. This is ideal for groups of radio-buttons
/// A non-exclusive group allow many buttons to be switched on at the same
/// time. The default setting is kFALSE.
 
void TGButtonGroup::SetExclusive(Bool_t enable)
{
   if (enable != IsExclusive()) {
      fExclGroup = enable;
      ChangedBy("SetExclusive");  // emit signal
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// If enable is kTRUE, this button group will treat radio buttons as
/// mutually exclusive, and other buttons according to IsExclusive().
/// This function is called automatically whenever a TGRadioButton
/// is inserted, so you should normally never have to call it.
 
void TGButtonGroup::SetRadioButtonExclusive(Bool_t enable)
{
   if (enable != IsRadioButtonExclusive()) {
      fRadioExcl = enable;
      ChangedBy("SetRadioButtonExclusive"); // emit signal
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Sets the state of all the buttons in the group to enable or disable.
 
void TGButtonGroup::SetState(Bool_t state)
{
   fState = state;
 
   TIter next(fMapOfButtons);
   TGButton *item = 0;
 
   while ((item = (TGButton*)next())) {    // loop over all buttons
      if (state) {
         item->SetState(kButtonUp);
      } else {
         item->SetState(kButtonDisabled);
      }
   }
   DoRedraw();
}
////////////////////////////////////////////////////////////////////////////////
/// Sets the button with id to be on/down, and if this is an
/// exclusive group, all other button in the group to be off/up.
 
void TGButtonGroup::SetButton(Int_t id, Bool_t down)
{
   TGButton *b = Find(id);
 
   if (b && (b->IsDown() != down)) {
      b->SetState(kButtonDown, kTRUE);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Inserts a button with the identifier id into the button group.
/// Returns the button identifier.
///
/// It is not necessary to manually insert buttons that have this button
/// group as their parent widget. An exception is when you want custom
/// identifiers instead of the default 1, 2, 3 etc.
///
/// The button is assigned the identifier id or an automatically
/// generated identifier.  It works as follows: If id > 0, this
/// identifier is assigned.  If id == -1 (default), the identifier is
/// equal to the number of buttons in the group+1.  If id is any other
/// negative integer, for instance -2, a unique identifier (negative
/// integer <= -2) is generated.
///
/// Inserting several buttons with id = -1 assigns the identifiers 1,
/// 2, 3, etc.
 
Int_t TGButtonGroup::Insert(TGButton *button, Int_t id)
{
   if (button->fGroup && button->fGroup != this)
      button->fGroup->Remove(button);
 
   if (button->fGroup == this) {
      if (id == -1)
         return GetId(button);    // the button is already in group
      else
         button->fGroup->Remove(button);  // want to set a new id
   }
 
   button->fGroup = this;
   button->Associate(this);
 
   static Int_t seq_no = -2;
   Longptr_t bid;
 
   if (id < -1)       bid = seq_no--;
   else if (id == -1) bid = GetCount()+1;
   else               bid = id;
 
   fMapOfButtons->Add(button, (TObject*)bid);
   AddFrame(button);
 
   // coverity[returned_null]
   // coverity[dereference]
   SetRadioButtonExclusive(button->IsA()->InheritsFrom(TGRadioButton::Class()));
 
   Connect(button, "Clicked()" , "TGButtonGroup", this, "ReleaseButtons()");
   Connect(button, "Pressed()" , "TGButtonGroup", this, "ButtonPressed()");
   Connect(button, "Released()", "TGButtonGroup", this, "ButtonReleased()");
   Connect(button, "Clicked()" , "TGButtonGroup", this, "ButtonClicked()");
 
   return (Int_t) bid;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Removes a button from the button group.
 
void TGButtonGroup::Remove(TGButton *button)
{
   TGButton *item = (TGButton*) fMapOfButtons->Remove(button);
   if (item) {
      button->SetGroup(0);
      button->Disconnect(this);
      button->DestroyWindow();
   }
 
   RemoveFrame(button);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Finds and returns a pointer to the button with the specified
/// identifier id. Returns null if the button was not found.
 
TGButton *TGButtonGroup::Find(Int_t id) const
{
   TIter next(fMapOfButtons);
   TGButton *item = 0;
 
   while ((item = (TGButton*)next())) {
      if ((Longptr_t)fMapOfButtons->GetValue(item) == id) break;   // found
   }
 
   return item;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Returns number of buttons in group
 
Int_t  TGButtonGroup::GetCount() const
{
   return fMapOfButtons->GetSize();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Finds and returns the id of the button.
/// Returns -1 if the button is not a member of this group.
 
Int_t TGButtonGroup::GetId(TGButton *button) const
{
   TPair *a = (TPair*) fMapOfButtons->FindObject(button);
   if (a)
      return (Int_t)Longptr_t(a->Value());
   else
      return -1;
}
 
////////////////////////////////////////////////////////////////////////////////
/// This slot is activated when one of the buttons in the group emits the
/// Pressed() signal.
 
void TGButtonGroup::ButtonPressed()
{
#if 0
   // Is here for historical purposes and example. Now this is not needed
   // anymore since TGButton has has its own GetSender() method returning
   // the TGButton proper.
 
   // This is needed since gTQSender points to TQObject part of TGButton
   TGButton *btn = dynamic_cast<TGButton*>((TQObject*)gTQSender);
 
   if (!btn) {
      Error("ButtonPressed", "gTQSender not a TGButton");
      return;
   }
#else
      TGButton *btn = (TGButton*)gTQSender;
#endif
 
   TPair *a = (TPair*) fMapOfButtons->FindObject(btn);
   if (a) {
      Int_t id = (Int_t)Longptr_t(a->Value());
      Pressed(id);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// This slot is activated when one of the buttons in the group emits the
/// Released() signal.
 
void TGButtonGroup::ButtonReleased()
{
   TGButton *btn = (TGButton*)gTQSender;
 
   TPair *a = (TPair*) fMapOfButtons->FindObject(btn);
   if (a) {
      Int_t id = (Int_t)Longptr_t(a->Value());
      Released(id);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// This slot is activated when one of the buttons in the group emits the
/// Clicked() signal.
 
void TGButtonGroup::ButtonClicked()
{
   TGButton *btn = (TGButton*)gTQSender;
 
   TPair *a = (TPair*) fMapOfButtons->FindObject(btn);
   if (a) {
      Int_t id = (Int_t)Longptr_t(a->Value());
      Clicked(id);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// This slot is activated when one of the buttons in the
/// exclusive group emits the Pressed() signal.
 
void TGButtonGroup::ReleaseButtons()
{
   if (!fExclGroup && !fRadioExcl) return;
 
   TGButton *btn = (TGButton*)gTQSender;
 
   if (!fExclGroup && !btn)
      return;
 
   TIter next(fMapOfButtons);
   TGButton *item = 0;
 
   while ((item = (TGButton*)next())) {    // loop over all buttons
      // coverity[returned_null]
      // coverity[dereference]
      if (btn != item && item->IsToggleButton() && item->IsOn() &&
          (fExclGroup || (item->IsA()->InheritsFrom(TGRadioButton::Class())
                          && btn->IsA()->InheritsFrom(TGRadioButton::Class())))) {
         item->SetOn(kFALSE);
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Show group of buttons.
 
void TGButtonGroup::Show()
{
   MapSubwindows();
   Resize();
   MapRaised();
   fClient->NeedRedraw(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Hide group of buttons.
 
void TGButtonGroup::Hide()
{
   UnmapWindow();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set or change title.
 
void TGButtonGroup::SetTitle(TGString *title)
{
   if (!title) {
      Error("SetTitle", "title cannot be 0, try \"\"");
      return;
   }
 
   if (strcmp(fText->GetString(), title->GetString())) {
      SetBorderDrawn(title->GetLength() ? kTRUE : kFALSE);
      TGGroupFrame::SetTitle(title);
      ChangedBy("SetTitle");
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set or change title.
 
void TGButtonGroup::SetTitle(const char *title)
{
   if (!title) {
      Error("SetTitle", "title cannot be 0, try \"\"");
      return;
   }
 
   if (strcmp(fText->GetString(), title)) {
      SetBorderDrawn(title && strlen(title));
      TGGroupFrame::SetTitle(title);
      ChangedBy("SetTitle");
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set layout hints for the specified button or if button=0 for all
/// buttons.
 
void TGButtonGroup::SetLayoutHints(TGLayoutHints *l, TGButton *button)
{
   TGFrameElement *el;
   TIter next(fList);
 
   while ((el = (TGFrameElement *)next())) {
      if ((el->fFrame==(TGFrame*)button) || !button) {
         el->fLayout = l ? l : fgDefaultHints;
      }
   }
   Layout();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Save a button group widget as a C++ statement(s) on output stream out.
 
void TGButtonGroup::SavePrimitive(std::ostream &out, Option_t *option /*= ""*/)
{
   // font + GC
   option = GetName() + 5;         // unique digit id of the name
   TString parGC, parFont;
   // coverity[returned_null]
   // coverity[dereference]
   parFont.Form("%s::GetDefaultFontStruct()",IsA()->GetName());
   // coverity[returned_null]
   // coverity[dereference]
   parGC.Form("%s::GetDefaultGC()()",IsA()->GetName());
 
   if ((GetDefaultFontStruct() != fFontStruct) || (GetDefaultGC()() != fNormGC)) {
      TGFont *ufont = gClient->GetResourcePool()->GetFontPool()->FindFont(fFontStruct);
      if (ufont) {
         ufont->SavePrimitive(out, option);
         parFont.Form("ufont->GetFontStruct()");
      }
 
      TGGC *userGC = gClient->GetResourcePool()->GetGCPool()->FindGC(fNormGC);
      if (userGC) {
         userGC->SavePrimitive(out, option);
         parGC.Form("uGC->GetGC()");
      }
   }
 
   if (fBackground != GetDefaultFrameBackground())
      SaveUserColor(out, option);
 
   out << "\n   // buttongroup frame\n";
 
   out << "   TGButtonGroup *" << GetName() << " = new TGButtonGroup(" << fParent->GetName()
       << ", \"" << TString(fText->GetString()).ReplaceSpecialCppChars() << "\"";
 
   if (fBackground == GetDefaultFrameBackground()) {
      if (fFontStruct == GetDefaultFontStruct()) {
         if (fNormGC == GetDefaultGC()()) {
            if (!GetOptions()) {
               out <<");\n";
            } else {
               out << "," << GetOptionString() <<");\n";
            }
         } else {
            out << "," << GetOptionString() << ", " << parGC <<");\n";
         }
      } else {
         out << "," << GetOptionString() << ", " << parGC << "," << parFont <<");\n";
      }
   } else {
      out << "," << GetOptionString() << "," << parGC << "," << parFont << ", ucolor);\n";
   }
   if (option && strstr(option, "keep_names"))
      out << "   " << GetName() << "->SetName(\"" << GetName() << "\");\n";
 
   // setting layout manager
   out << "   " << GetName() <<"->SetLayoutManager(";
   // coverity[returned_null]
   // coverity[dereference]
   GetLayoutManager()->SavePrimitive(out, option);
   out << ");\n";
 
   TIter next(GetList());
   while (auto f = static_cast<TGFrameElement *>(next())) {
      f->fFrame->SavePrimitive(out, option);
      if (f->fFrame->InheritsFrom("TGButton"))
         continue;
      else {
         out << "   " << GetName() << "->AddFrame(" << f->fFrame->GetName();
         f->fLayout->SavePrimitive(out, option);
         out << ");\n";
      }
   }
 
   if (IsExclusive())
      out << "   " << GetName() <<"->SetExclusive(kTRUE);\n";
 
   if (IsRadioButtonExclusive())
      out << "   " << GetName() <<"->SetRadioButtonExclusive(kTRUE);\n";
 
   if (!IsBorderDrawn())
      out << "   " << GetName() <<"->SetBorderDrawn(kFALSE);\n";
 
 
   out << "   " << GetName() << "->Resize(" << GetWidth()
       << "," << GetHeight() << ");\n";
 
   if (!IsEnabled())
      out << "   " << GetName() <<"->SetState(kFALSE);\n";
 
   out << "   " << GetName() << "->Show();\n";
}
 
////////////////////////////////////////////////////////////////////////////////
/// Save a button group widget as a C++ statement(s) on output stream out.
 
void TGHButtonGroup::SavePrimitive(std::ostream &out, Option_t *option /*= ""*/)
{
   // font + GC
   option = GetName() + 5; // unique digit id of the name
   TString parGC, parFont;
   parFont.Form("%s::GetDefaultFontStruct()", IsA()->GetName());
   parGC.Form("%s::GetDefaultGC()()", IsA()->GetName());
 
   if ((GetDefaultFontStruct() != fFontStruct) || (GetDefaultGC()() != fNormGC)) {
      TGFont *ufont = gClient->GetResourcePool()->GetFontPool()->FindFont(fFontStruct);
      if (ufont) {
         ufont->SavePrimitive(out, option);
         parFont.Form("ufont->GetFontStruct()");
      }
 
      TGGC *userGC = gClient->GetResourcePool()->GetGCPool()->FindGC(fNormGC);
      if (userGC) {
         userGC->SavePrimitive(out, option);
         parGC.Form("uGC->GetGC()");
      }
   }
 
   if (fBackground != GetDefaultFrameBackground())
      SaveUserColor(out, option);
 
   out << "\n   // horizontal buttongroup frame\n";
 
   out << "   TGHButtonGroup *" << GetName() << " = new TGHButtonGroup(" << fParent->GetName() << ", \""
       << TString(fText->GetString()).ReplaceSpecialCppChars() << "\"";
   if (fBackground == GetDefaultFrameBackground()) {
 
      if (fFontStruct == GetDefaultFontStruct()) {
 
         if (fNormGC == GetDefaultGC()()) {
            out << ");\n";
         } else {
            out << "," << parGC << ");\n";
         }
      } else {
         out << "," << parGC << "," << parFont << ");\n";
      }
   } else {
      out << "," << parGC << "," << parFont << ", ucolor);\n";
   }
   if (option && strstr(option, "keep_names"))
      out << "   " << GetName() << "->SetName(\"" << GetName() << "\");\n";
 
   TIter next(GetList());
   while (auto f = (TGFrameElement *)next()) {
      f->fFrame->SavePrimitive(out, option);
      if (f->fFrame->InheritsFrom("TGButton")) {
         out << "   " << GetName() << "->SetLayoutHints(";
         f->fLayout->SavePrimitive(out, "nocoma");
         out << "," << f->fFrame->GetName() << ");\n";
      } else {
         out << "   " << GetName() << "->AddFrame(" << f->fFrame->GetName();
         f->fLayout->SavePrimitive(out, option);
         out << ");\n";
      }
   }
 
   if (!IsEnabled())
      out << "   " << GetName() << "->SetState(kFALSE);\n";
 
   if (IsExclusive())
      out << "   " << GetName() << "->SetExclusive(kTRUE);\n";
 
   if (IsRadioButtonExclusive())
      out << "   " << GetName() << "->SetRadioButtonExclusive(kTRUE);\n";
 
   if (!IsBorderDrawn())
      out << "   " << GetName() << "->SetBorderDrawn(kFALSE);\n";
 
   out << "   " << GetName() << "->Resize(" << GetWidth() << "," << GetHeight() << ");\n";
 
   out << "   " << GetName() << "->Show();\n";
}
 
////////////////////////////////////////////////////////////////////////////////
/// Save a button group widget as a C++ statement(s) on output stream out.
 
void TGVButtonGroup::SavePrimitive(std::ostream &out, Option_t *option /*= ""*/)
{
   // font + GC
   option = GetName() + 5; // unique digit id of the name
   TString parGC, parFont;
   parFont.Form("%s::GetDefaultFontStruct()", IsA()->GetName());
   parGC.Form("%s::GetDefaultGC()()", IsA()->GetName());
 
   if ((GetDefaultFontStruct() != fFontStruct) || (GetDefaultGC()() != fNormGC)) {
      TGFont *ufont = gClient->GetResourcePool()->GetFontPool()->FindFont(fFontStruct);
      if (ufont) {
         ufont->SavePrimitive(out, option);
         parFont.Form("ufont->GetFontStruct()");
      }
 
      TGGC *userGC = gClient->GetResourcePool()->GetGCPool()->FindGC(fNormGC);
      if (userGC) {
         userGC->SavePrimitive(out, option);
         parGC.Form("uGC->GetGC()");
      }
   }
 
   if (fBackground != GetDefaultFrameBackground())
      SaveUserColor(out, option);
 
   out << "\n   // vertical buttongroup frame\n";
 
   out << "   TGVButtonGroup *" << GetName() << " = new TGVButtonGroup(" << fParent->GetName()
       << ", \"" << TString(fText->GetString()).ReplaceSpecialCppChars() << "\"";
 
   if (fBackground == GetDefaultFrameBackground()) {
      if (fFontStruct == GetDefaultFontStruct()) {
         if (fNormGC == GetDefaultGC()()) {
            out << ");\n";
         } else {
            out << "," << parGC << ");\n";
         }
      } else {
         out << "," << parGC << "," << parFont << ");\n";
      }
   } else {
      out << "," << parGC << "," << parFont << ", ucolor);\n";
   }
   if (option && strstr(option, "keep_names"))
      out << "   " << GetName() << "->SetName(\"" << GetName() << "\");\n";
 
   TIter next(GetList());
   while (auto f = static_cast<TGFrameElement *>(next())) {
      f->fFrame->SavePrimitive(out, option);
      if (f->fFrame->InheritsFrom("TGButton"))
         continue;
      out << "   " << GetName() << "->AddFrame(" << f->fFrame->GetName();
      f->fLayout->SavePrimitive(out, option);
      out << ");\n";
   }
 
   if (!IsEnabled())
      out << "   " << GetName() <<"->SetState(kFALSE);\n";
 
   if (IsExclusive())
      out << "   " << GetName() <<"->SetExclusive(kTRUE);\n";
 
   if (IsRadioButtonExclusive())
      out << "   " << GetName() <<"->SetRadioButtonExclusive(kTRUE);\n";
 
   if (!IsBorderDrawn())
      out << "   " << GetName() <<"->SetBorderDrawn(kFALSE);\n";
 
   out << "   " << GetName() << "->Resize(" << GetWidth()
       << "," << GetHeight() << ");\n";
 
   out << "   " << GetName() << "->Show();\n";
}