thread.cpp

AbsDataBase5.16 最新版

//---------------------------------------------------------------------------
#include <vcl.h>
#include <stdlib.h>
#pragma hdrstop

#include "Thread.h"
#include "Main.h"
#pragma package(smart_init)

const AnsiString DataBaseFileName = "../../Data/Demos.abs";

const AnsiString ChatMessages[10] = {"Hi", "Hello", "I'm here", "Banzay!",
    "Cool", "how are you?", "fine", "who is here", "I'm here", "BzzzZzzz..."};

//---------------------------------------------------------------------------
//   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 TChatMemberThread::UpdateCaption()
//      {
//        Form1->Caption = "Updated in a thread";
//      }
//---------------------------------------------------------------------------
__fastcall TChatMemberThread::TChatMemberThread(bool CreateSuspended)
        : TThread(CreateSuspended)
{
}

__fastcall TChatMemberThread::TChatMemberThread(AnsiString Name, bool CreateSuspended): TThread(CreateSuspended)
{
  FName = Name;
  FreeOnTerminate = True;

  FSession = new TABSSession(NULL);
  FSession->AutoSessionName = true;

  FDatabase = new TABSDatabase(NULL);
  FDatabase->DatabaseName = "db_" + Name + "_" + IntToStr(random(1000));
  FDatabase->DatabaseFileName = ExtractFilePath(Application->ExeName) + DataBaseFileName;
  FDatabase->SessionName = FSession->SessionName;
  FDatabase->MultiUser = True;
  FDatabase->Open();

  FTable = new TABSTable(NULL);
  FTable->SessionName = FSession->SessionName;
  FTable->DatabaseName = FDatabase->DatabaseName;
  FTable->TableName = "Chat";
  FTable->Open();
}

__fastcall TChatMemberThread::~TChatMemberThread(void)
{
  delete FTable;
  delete FDatabase;
  delete FSession;
}

void __fastcall TChatMemberThread::RefreshTable()
{
  frmMain->tblChat->Refresh();
}

AnsiString  __fastcall RandomFrom(const AnsiString  *AValues, int AValues_Size)
{
 return AValues[random(AValues_Size)];
}

//---------------------------------------------------------------------------
void __fastcall TChatMemberThread::Execute()
{
int I;

  for (I=0;I<=20;I++)
  {
    if (Terminated) return;
    if (frmMain->tblChat->Active && frmMain->tblChat->Exists)
    {
      FTable->AppendRecord(ARRAYOFCONST((FName, RandomFrom(ChatMessages,10))));
      Synchronize(RefreshTable);
      Sleep(random(100));
    }
  }
}
//---------------------------------------------------------------------------