progressdialog.cpp

7z一个高压缩比的压缩程序源代码,重要的是里面的算法值得学习

// ProgressDialog.cpp

#include "StdAfx.h"
#include "resource.h"
#include "ProgressDialog.h"
#include "Common/IntToString.h"
#include "Common/IntToString.h"

using namespace NWindows;

static const UINT_PTR kTimerID = 3;
static const UINT kTimerElapse = 50;

#ifdef LANG
#include "LangUtils.h"
#endif

#ifdef LANG
static CIDLangPair kIDLangPairs[] =
{
  { IDCANCEL, 0x02000711 }
};
#endif

HRESULT CProgressSynch::ProcessStopAndPause()
{
  for (;;)
  {
    if (GetStopped())
      return E_ABORT;
    if (!GetPaused())
      break;
    ::Sleep(100);
  }
  return S_OK;
}

#ifndef _SFX
CProgressDialog::~CProgressDialog()
{
  AddToTitle(L"");
}
void CProgressDialog::AddToTitle(LPCWSTR s)
{
  if (MainWindow != 0)
    MySetWindowText(MainWindow, UString(s) + MainTitle);
}
#endif



bool CProgressDialog::OnInit()
{
  _range = UINT64(-1);
  _prevPercentValue = -1;

  #ifdef LANG
  // LangSetWindowText(HWND(*this), 0x02000C00);
  LangSetDlgItemsText(HWND(*this), kIDLangPairs, sizeof(kIDLangPairs) / sizeof(kIDLangPairs[0]));
  #endif

  m_ProgressBar.Attach(GetItem(IDC_PROGRESS1));
  _timer = SetTimer(kTimerID, kTimerElapse);
  _dialogCreatedEvent.Set();
  SetText(_title);
  return CModalDialog::OnInit();
}

void CProgressDialog::OnCancel()
{
  ProgressSynch.SetStopped(true);
}

void CProgressDialog::SetRange(UINT64 range)
{
  _range = range;
  _peviousPos = (UInt64)(Int64)-1;
  _converter.Init(range);
  m_ProgressBar.SetRange32(0 , _converter.Count(range)); // Test it for 100%
}

void CProgressDialog::SetPos(UINT64 pos)
{
  bool redraw = true;
  if (pos < _range && pos > _peviousPos)
  {
    UINT64 posDelta = pos - _peviousPos;
    if (posDelta < (_range >> 10))
      redraw = false;
  }
  if(redraw)
  {
    m_ProgressBar.SetPos(_converter.Count(pos));  // Test it for 100%
    _peviousPos = pos;
  }
}

bool CProgressDialog::OnTimer(WPARAM /* timerID */, LPARAM /* callback */)
{
  if (ProgressSynch.GetPaused())
    return true;
  UINT64 total, completed;
  ProgressSynch.GetProgress(total, completed);
  if (total != _range)
    SetRange(total);
  SetPos(completed);

  if (total == 0)
    total = 1;

  int percentValue = (int)(completed * 100 / total);
  if (percentValue != _prevPercentValue)
  {
    wchar_t s[64];
    ConvertUInt64ToString(percentValue, s);
    UString title = s;
    title += L"% ";
    SetText(title + _title);
    #ifndef _SFX
    AddToTitle(title + MainAddTitle);
    #endif
    _prevPercentValue = percentValue;
  }
  return true;
}


////////////////////
// CU64ToI32Converter

static const UINT64 kMaxIntValue = 0x7FFFFFFF;

void CU64ToI32Converter::Init(UINT64 range)
{
  _numShiftBits = 0;
  while(range > kMaxIntValue)
  {
    range >>= 1;
    _numShiftBits++;
  }
}

int CU64ToI32Converter::Count(UINT64 aValue)
{
  return int(aValue >> _numShiftBits);
}

const UINT CProgressDialog::kCloseMessage = WM_USER + 1;

bool CProgressDialog::OnMessage(UINT message, WPARAM wParam, LPARAM lParam)
{
  switch(message)
  {
    case kCloseMessage:
    {
      KillTimer(_timer);
      _timer = 0;
      End(0);
      return true;
    }
    case WM_SETTEXT:
    {
      if (_timer == 0)
        return true;
    }
  }
  return CModalDialog::OnMessage(message, wParam, lParam);
}

bool CProgressDialog::OnButtonClicked(int buttonID, HWND buttonHWND)
{
  switch(buttonID)
  {
    case IDCANCEL:
    {
      bool paused = ProgressSynch.GetPaused();;
      ProgressSynch.SetPaused(true);
      int res = ::MessageBoxW(HWND(*this),
          L"Are you sure you want to cancel?",
          _title, MB_YESNOCANCEL);
      ProgressSynch.SetPaused(paused);
      if (res == IDCANCEL || res == IDNO)
        return true;
      break;
    }
  }
  return CModalDialog::OnButtonClicked(buttonID, buttonHWND);
}