setfilepointer.cpp

来自「IO函数调用测试」· C++ 代码 · 共 203 行

// SetFilePointer.cpp : implementation file
//

#include "stdafx.h"
#include "afxtempl.h"

#include "help.h"
#include "DataArray.h"
#include "HexDisp.h"
#include "IOExplorer.h"
#include "NumericEdit.h"
#include "Status.h"

#include "TraceEvent.h"
#include "EventList.h"
  #include "EventLog.h"
#include "Handle.h"
  #include "HandleCombo.h"
  #include "HandleManager.h"	
  #include "TraceManager.h"
    #include "CreateFileSheet.h"
    #include "SetFilePointerEvent.h"
    #include "HandlePage.h"
      #include "SetFilePointer.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSetFilePointer property page

IMPLEMENT_DYNCREATE(CSetFilePointer, CHandlePage)

CSetFilePointer::CSetFilePointer() : CHandlePage(CSetFilePointer::IDD)
{
 initialized = FALSE;
	//{{AFX_DATA_INIT(CSetFilePointer)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
}

CSetFilePointer::~CSetFilePointer()
{
}

void CSetFilePointer::DoDataExchange(CDataExchange* pDX)
{
	CHandlePage::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSetFilePointer)
	DDX_Control(pDX, IDC_FILE_END, c_FileEnd);
	DDX_Control(pDX, IDC_FILE_CURRENT, c_FileCurrent);
	DDX_Control(pDX, IDC_FILE_BEGIN, c_FileBegin);
	DDX_Control(pDX, IDC_SPIN_POSITION, c_SpinPosition);
	DDX_Control(pDX, IDC_SETFILEPOINTER, c_SetFilePointer);
	DDX_Control(pDX, IDC_DISTANCETOMOVE, c_DistanceToMove);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CSetFilePointer, CHandlePage)
	//{{AFX_MSG_MAP(CSetFilePointer)
	ON_EN_CHANGE(IDC_DISTANCETOMOVE, OnChangeDistancetomove)
	ON_BN_CLICKED(IDC_FILE_BEGIN, OnFileBegin)
	ON_BN_CLICKED(IDC_FILE_CURRENT, OnFileCurrent)
	ON_BN_CLICKED(IDC_FILE_END, OnFileEnd)
	ON_BN_CLICKED(IDC_SETFILEPOINTER, OnSetfilepointer)
	ON_BN_CLICKED(IDC_HELPBUTTON, OnHelp)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSetFilePointer message handlers

void CSetFilePointer::OnChangeDistancetomove() 
{
 updateControls();	
}

void CSetFilePointer::OnFileBegin() 
{
 updateControls();
}

void CSetFilePointer::OnFileCurrent() 
{
 updateControls();
}

void CSetFilePointer::OnFileEnd() 
{
 updateControls();
}

void CSetFilePointer::OnSetfilepointer() 
    {
     CCreateFileSheet * sheet = getSheet();
     CHandle * ho = sheet->HandleList.getCurrentHandle();

     SetFilePointerEvent * e = new SetFilePointerEvent(
					   ho == NULL ? _T("") : ho->Name,
					   ho == NULL ? 0 : ho->h,
					   c_DistanceToMove.GetWindowInt(),
					   0, // Not yet implemented
					   getMode());
	
     e->execute();
     if(e->result == 0xFFFFFFFF && e->lasterror != 0) // High-order not yet implemented
        { /* failed */
	 c_Status.SetWindowText(e->lasterror);
	} /* failed */
     else
        { /* ok */
	 c_Status.SetWindowText(e->display_result());
	} /* ok */
	 
     sheet->log->add(e);
    }

/****************************************************************************
*                          CSetFilePointer::getMode
* Result: DWORD
*       FILE_BEGIN, FILE_CURRENT, or FILE_END
****************************************************************************/

DWORD CSetFilePointer::getMode()
    {
     if(c_FileBegin.GetCheck() == BST_CHECKED)
	return FILE_BEGIN;
     else
     if(c_FileCurrent.GetCheck() == BST_CHECKED)
	return FILE_CURRENT;
     else
     if(c_FileEnd.GetCheck() == BST_CHECKED)
	return FILE_END;

     ASSERT(FALSE);  // should never get here
     return FILE_BEGIN;
    }

/****************************************************************************
*                       CSetFilePointer::updateControls
* Result: void
*       
* Effect: 
*       Updates all the controls
****************************************************************************/

void CSetFilePointer::updateControls()
    {
     if(!initialized)
	return;

     CCreateFileSheet * sheet = getSheet();
     CHandle * ho = sheet->HandleList.getCurrentHandle();
     
     SetFilePointerEvent e(ho == NULL ? _T("") : ho->Name,
     			   ho == NULL ? 0 : ho->h,
			   c_DistanceToMove.GetWindowInt(),
			   0, // Not yet implemented
			   getMode());
     CString s = e.display();
     c_Text.SetWindowText(s);
     c_SetFilePointer.EnableWindow(ho != NULL);

     // NYI: c_SpinPosition.SetRange(-filesize, filesize);
    }

BOOL CSetFilePointer::OnSetActive() 
{
     return CHandlePage::OnSetActive();
}

BOOL CSetFilePointer::OnInitDialog() 
{
	CHandlePage::OnInitDialog();
	
 	c_SpinPosition.SetRange(-1000, 1000);
	
 	CheckRadioButton(IDC_FILE_BEGIN, IDC_FILE_END, IDC_FILE_BEGIN);

 	initialized = TRUE;
	updateControls();

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

/****************************************************************************
*                           CSetFilePointer::OnHelp
* Result: void
*       
* Effect: 
*       Calls help
****************************************************************************/

void CSetFilePointer::OnHelp()
    {
     AfxGetApp()->WinHelp(SetFilePointerHelp, HELP_CONTEXT);
    }