displaydlg.cpp

C++编程100例

// DisplayDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Display.h"
#include "DisplayDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDisplayDlg dialog

CDisplayDlg::CDisplayDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDisplayDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDisplayDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDisplayDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDisplayDlg)
	DDX_Control(pDX, IDC_COMBO1, m_cmbDisplay);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDisplayDlg, CDialog)
	//{{AFX_MSG_MAP(CDisplayDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_CLOSE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDisplayDlg message handlers

BOOL CDisplayDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	DEVMODE *lpDevMode;
	lpDevMode=new DEVMODE;
	int i=0,nIndex;
	CString str;
	BOOL Result=EnumDisplaySettings(NULL,i,lpDevMode);
	while(Result)
	{
		str.Format("%d×%d×%d位色",lpDevMode->dmPelsWidth,
			lpDevMode->dmPelsHeight,lpDevMode->dmBitsPerPel);
		nIndex=m_cmbDisplay.AddString(str);
		m_cmbDisplay.SetItemDataPtr(nIndex,lpDevMode);
		lpDevMode=new DEVMODE;
		Result=EnumDisplaySettings(NULL,++i,lpDevMode);
	}
	delete lpDevMode;
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CDisplayDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CDisplayDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CDisplayDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}



void CDisplayDlg::OnOK() 
{
	int nIndex;

	nIndex=m_cmbDisplay.GetCurSel();
	if( nIndex != CB_ERR )
	{
		DEVMODE *lpDevMode=(DEVMODE *)m_cmbDisplay.GetItemDataPtr(nIndex);
		lpDevMode->dmFields=DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
		LONG lresult=ChangeDisplaySettings(lpDevMode,0);
		if( lresult == DISP_CHANGE_SUCCESSFUL )
			::AfxMessageBox("设置显示器显示模式成功！",MB_OK);
		else if( lresult == DISP_CHANGE_RESTART )
			::AfxMessageBox("设置显示器显示模式成功！需要重启计算机。",MB_OK);
		else
			::AfxMessageBox("设置显示器显示模式失败！",MB_OK|MB_ICONEXCLAMATION);
	}
	
	CDialog::OnOK();
}

void CDisplayDlg::OnClose() 
{
	int i;
	DEVMODE *lpDevMode=NULL;

	for(i=0;i<m_cmbDisplay.GetCount();i++)
	{
		lpDevMode=(DEVMODE *)m_cmbDisplay.GetItemDataPtr(i);
		ASSERT(lpDevMode != NULL);
		delete lpDevMode;
		lpDevMode=NULL;
	}
	
	CDialog::OnClose();
}

void CDisplayDlg::OnCancel() 
{
	// TODO: Add extra cleanup here
	
	CDialog::OnCancel();
}