#include "TGClient.h"
#include "TGButton.h"
#include "TGFrame.h"
#include "TGeoManager.h"
#include "TEveManager.h"
#include "TEveGeoNode.h"
#include "TEveBrowser.h"

class LauncherMainFrame : public TGMainFrame {

private:
   TGCompositeFrame *fCframe;
   TGTextButton     *fStart, *fClose, *fExit;
   Bool_t            fStarted;

public:
   LauncherMainFrame(const TGWindow *p, UInt_t w, UInt_t h);
   virtual ~LauncherMainFrame();
   // slots
   void StartEve();
   void CloseEve();

   ClassDef(LauncherMainFrame, 0)
};

void LauncherMainFrame::StartEve()
{
   // Slot connected to the Clicked() signal. 
  
   if (!fStarted || !gEve || !gEve->GetBrowser()) {
      TEveManager::Create();
      gGeoManager = gEve->GetGeometry("http://root.cern.ch/files/alice.root");
      TGeoNode* node = gGeoManager->GetTopVolume()->FindNode("ITSV_1");
      TEveGeoTopNode* its = new TEveGeoTopNode(gGeoManager, node);
      gEve->AddGlobalElement(its);
      gEve->Redraw3D(kTRUE);
      fStarted = kTRUE;
   }
}

void LauncherMainFrame::CloseEve()
{
   // Slot connected to the Clicked() signal. 
  
   if (fStarted) {
      if (gEve && gEve->GetBrowser())
         gEve->GetBrowser()->GetMainFrame()->CloseWindow();
      fStarted = kFALSE;
   }
}

LauncherMainFrame::LauncherMainFrame(const TGWindow *p, UInt_t w, UInt_t h) :
   TGMainFrame(p, w, h), fStart(0), fClose(0), fExit(0), fStarted(0)
{
   // Create a horizontal frame containing buttons
   fCframe = new TGCompositeFrame(this, 170, 20, kHorizontalFrame|kFixedWidth);
   
   fStart = new TGTextButton(fCframe, "&Start Eve");
   fStart->Connect("Clicked()", "LauncherMainFrame", this, "StartEve()");
   fCframe->AddFrame(fStart, new TGLayoutHints(kLHintsTop | kLHintsExpandX, 
                                               3, 2, 2, 2));
   fStart->SetToolTipText("Click to Start Eve");
   
   fClose = new TGTextButton(fCframe, "&Close Eve");
   fClose->Connect("Clicked()", "LauncherMainFrame", this, "CloseEve()");
   fClose->SetToolTipText("Click to close Eve Window");
   fCframe->AddFrame(fClose, new TGLayoutHints(kLHintsTop | kLHintsExpandX,
                                               3, 2, 2, 2));
  
   AddFrame(fCframe, new TGLayoutHints(kLHintsCenterX, 2, 2, 5, 1));

   fExit = new TGTextButton(this, "&Exit ","gApplication->Terminate(0)");
   AddFrame(fExit, new TGLayoutHints(kLHintsTop | kLHintsExpandX,5,5,2,2));
   
   SetWindowName("Launcher Demo");
   
   MapSubwindows();
   Resize(GetDefaultSize());
   MapWindow();
}

LauncherMainFrame::~LauncherMainFrame()
{
   // Clean up all widgets, frames and layouthints that were used
   fCframe->Cleanup();
   Cleanup();
}

void launcher()
{
   // Popup the GUI...
   new LauncherMainFrame(gClient->GetRoot(), 350, 80);
}