screenthread.cpp

基于USB接口的GPS应用程序

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "screenthread.h"
#include "display.h"


#pragma package(smart_init)

//---------------------------------------------------------------------------

//   Important: Methods and properties of objects in VCL can only be
//   used in a method called using Synchronize, for example:
//
//      Synchronize(UpdateCaption);
//
//   where UpdateCaption could look like:
//
//      void __fastcall Unit1::UpdateCaption()
//      {
//        Form1->Caption = "Updated in a thread";
//      }
//---------------------------------------------------------------------------

__fastcall ScreenThread::ScreenThread(bool CreateSuspended, void* p)
        : TThread(CreateSuspended)
{
  p_form = reinterpret_cast<TForm1*> (p);
  p_gpsnav = p_form->get_gpsnav_pt();
  p_gpsfunc = p_form->get_gpsfunc_pt();
  FreeOnTerminate = false;
  count = 0;
}
//---------------------------------------------------------------------------
void __fastcall ScreenThread::Execute()
{
        //---- Place thread code here ----
        while(!Terminated)
        {
         WaitForSingleObject( dispEvent, INFINITE );
         p_gpsnav->get_rawdata( &DispRawdata );
         p_gpsnav->get_trkloop( result_pt );
         p_gpsfunc->get_navinfo(&DispNavInfo);

         count ++;
         Synchronize(update_disp);
        }
}
void __fastcall ScreenThread::update_disp()
{
 p_form->update_allchannel(&DispRawdata);
 p_form->update_trkloop(result_pt);
 p_form->update_navresult(&DispNavInfo);
 p_form->update_disp();
}

//---------------------------------------------------------------------------