rotationscreendlg.cpp

WinCE5.0 Rotation Screen Program

// RotationScreenDlg.cpp : implementation file
//

#include "stdafx.h"
#include "RotationScreen.h"
#include "RotationScreenDlg.h"

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

const TCHAR szregRootKey[] = TEXT("System\\GDI\\Rotation");
const TCHAR szregAngle[] = TEXT("Angle");

/////////////////////////////////////////////////////////////////////////////
// CRotationScreenDlg dialog

CRotationScreenDlg::CRotationScreenDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRotationScreenDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRotationScreenDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CRotationScreenDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRotationScreenDlg)
	DDX_Control(pDX, IDC_RADIO_ROTATE90, m_radio_rotate_90);
	DDX_Control(pDX, IDC_RADIO_ROTATE0, m_radio_rotate_0);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRotationScreenDlg, CDialog)
	//{{AFX_MSG_MAP(CRotationScreenDlg)
	ON_BN_CLICKED(IDC_RADIO_ROTATE90, OnRadioRotate90)
	ON_BN_CLICKED(IDC_RADIO_ROTATE0, OnRadioRotate0)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRotationScreenDlg message handlers

BOOL CRotationScreenDlg::OnInitDialog()
{
	HKEY    hKey;
	LONG    lResult;
	DWORD   dwType;
	DWORD   dwVal;
	DWORD   dwLen;

	CDialog::OnInitDialog();

	// 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
	
	CenterWindow(GetDesktopWindow());	// center to the hpc screen

	// TODO: Add extra initialization here
	lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE, szregRootKey, 0, KEY_ALL_ACCESS, &hKey);
	if(ERROR_SUCCESS == lResult)
	{
		dwType = REG_DWORD;
		dwLen = sizeof(DWORD);
		lResult = RegQueryValueEx(hKey, szregAngle, NULL, &dwType, 
						  (LPBYTE)&dwVal, &dwLen);
		if(ERROR_SUCCESS == lResult)
		{
			if(dwVal == 90)
			{
				m_radio_rotate_90.SetCheck(TRUE);
				m_radio_rotate_0.SetCheck(FALSE);
				m_RotateState = TRUE;
			}
			else if(dwVal == 180)
			{
				m_radio_rotate_90.SetCheck(FALSE);
				m_radio_rotate_0.SetCheck(TRUE);
				m_RotateState = FALSE;
			}
			else
			{
				RegCloseKey(hKey);	
				return FALSE;
			}

		}
		else
		{
			RegCloseKey(hKey);	
			return FALSE;
		}
	}
	else
	{
		RegCloseKey(hKey);
		return FALSE;
	}
	
	RegCloseKey(hKey);
	return TRUE;  // return TRUE  unless you set the focus to a control
}



void CRotationScreenDlg::OnRadioRotate90() 
{
	// TODO: Add your control notification handler code here
	m_radio_rotate_90.SetCheck(TRUE);
	m_radio_rotate_0.SetCheck(FALSE);
	m_RotateState = TRUE;
}

void CRotationScreenDlg::OnRadioRotate0() 
{
	// TODO: Add your control notification handler code here
	m_radio_rotate_90.SetCheck(FALSE);
	m_radio_rotate_0.SetCheck(TRUE);
	m_RotateState = FALSE;	
}

void CRotationScreenDlg::OnOK() 
{
	DEVMODE mode;
	HKEY    hKey;
	LONG    lResult;
	DWORD   dwVal;
	
	lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE, szregRootKey, 0, KEY_ALL_ACCESS, &hKey);
	if(ERROR_SUCCESS != lResult)
	{
		RegCloseKey(hKey);
		return;
	}

	mode.dmSize = sizeof(DEVMODE);
	mode.dmFields = DM_DISPLAYORIENTATION;

	// TODO: Add extra validation here
	if(m_RotateState)
    {
		mode.dmDisplayOrientation = DMDO_90;
		dwVal = 90;
	}
	else
    {
		mode.dmDisplayOrientation = DMDO_180;
		dwVal = 180;
	}

	RegSetValueEx (hKey, szregAngle, 0, REG_DWORD, (BYTE *)&dwVal, sizeof(DWORD));
	RegCloseKey(hKey);
	ChangeDisplaySettingsEx( NULL, &mode, NULL, 0, NULL );
	
	CDialog::OnOK();
}