#include <iostream>
using namespace std;

#include <TApplication.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGListBox.h>
#include <TList.h>
#include <TGLabel.h>
#include <TGComboBox.h>

class MainFrame : public TGMainFrame {

private:
  TGComboBox* m_Options;
  TGGroupFrame* m_OptionsFrame;
  TGCompositeFrame* m_OptionsSubFrame;

public:
  MainFrame(const TGWindow *p, UInt_t w, UInt_t h);
  virtual ~MainFrame();

  void Create();
  void UpdateOptions();

  bool ProcessMessage(long Message, long Parameter1, 
                      long Parameter2);

   ClassDef(MainFrame, 0)
};


MainFrame::MainFrame(const TGWindow *p, UInt_t w, UInt_t h) :
   TGMainFrame(p, w, h)
{
   // Create main frame
  m_OptionsSubFrame = 0;
  Create();
}

MainFrame::~MainFrame()
{
  // Clean up main frame...
  Cleanup();
}

void MainFrame::Create() 
{
  TGLayoutHints* LayoutL1 = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsCenterX, 20, 20, 10, 10);

  TGCompositeFrame* BeamTypeFrame = new TGCompositeFrame(this, 100, 100, kHorizontalFrame);
  AddFrame(BeamTypeFrame, LayoutL1);

  TGLabel* BeamTypeLabel = new TGLabel(BeamTypeFrame, "Options:");
  BeamTypeFrame->AddFrame(BeamTypeLabel, LayoutL1);

  m_Options = new TGComboBox(BeamTypeFrame);
  for (int b = 0; b <= 10; ++b) {
    TString E("Entries: ");
    E += b;
    m_Options->AddEntry(E, b);
  }
  m_Options->Associate(this);
  m_Options->Resize(100, 20);
  m_Options->Select(10);
  BeamTypeFrame->AddFrame(m_Options, LayoutL1);


  m_OptionsFrame = new TGGroupFrame(this, "Options frame");
  AddFrame(m_OptionsFrame, LayoutL1);

  UpdateOptions();
  
  MapSubwindows();
  MapWindow();  
  Layout();
}


void MainFrame::UpdateOptions()
{
  TGLayoutHints* Default = new TGLayoutHints(kLHintsLeft | kLHintsTop | kLHintsCenterY | kLHintsExpandX, 0, 0, 0, 0);

  if (m_OptionsSubFrame != 0) {
    m_OptionsSubFrame->UnmapWindow();
    m_OptionsFrame->RemoveAll();
    delete m_OptionsSubFrame;
  }

  m_OptionsSubFrame = new TGCompositeFrame(m_OptionsFrame);
  for (int i = 0; i < m_Options->GetSelected(); ++i) {
    TString Text("Added ");
    Text += i+1;
    Text += "/";
    Text += m_Options->GetSelected();
    TGLabel* Label = new TGLabel(m_OptionsSubFrame, Text);
    m_OptionsSubFrame->AddFrame(Label);
  }

  m_OptionsFrame->AddFrame(m_OptionsSubFrame, Default);
  
  // Give this element the default size of its content:
  Resize(GetDefaultWidth(), GetDefaultHeight()); 

  MapSubwindows();
  MapWindow();  
  Layout();
}


bool MainFrame::ProcessMessage(long Message, long Parameter1, long)
{
  // Process the messages for this application, mainly the scollbar moves:

  switch (GET_MSG(Message)) {
  case kC_COMMAND:
    switch (GET_SUBMSG(Message)) {
    case kCM_CHECKBUTTON:
      break;
    case kCM_COMBOBOX:
      UpdateOptions();
      break;
    case kCM_BUTTON:
    case kCM_MENU:
      switch (Parameter1) {
      default:
        break;
      }
      break;
    default:
      break;
    }
    break;
  default:
    break;
  }

  
  return true;
}


void Problem()
{
   new MainFrame(gClient->GetRoot(), 300, 200);
}