colorsnapdlg.cpp

visual c++ 实例编程

/////////////////////////////////////////////////////////////////////////////
// 类名：CColorSnapDlg
// 功能：屏幕颜色拾取
////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "ColorSnap.h"
#include "ColorSnapDlg.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 };
	CWBButton	m_OK;
	//}}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)
	virtual BOOL OnInitDialog();
	//}}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)
	DDX_Control(pDX, IDOK, m_OK);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

//********************************************************************************
//* 名称：OnInitDialog
//* 功能：初始化关于对话框
//********************************************************************************
BOOL CAboutDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	//设置位图按钮
	m_OK.LoadBitmaps(IDB_BUTTON,5, 5, 5, 5, 4 );
	
	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}
/////////////////////////////////////////////////////////////////////////////
// CColorSnapDlg dialog

CColorSnapDlg::CColorSnapDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CColorSnapDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CColorSnapDlg)
		// 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 CColorSnapDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CColorSnapDlg)
	DDX_Control(pDX, IDC_ColorPicker, m_ColorPicker);
	DDX_Control(pDX, IDC_ABOUT, m_About);
	DDX_Control(pDX, IDOK, m_OK);
	DDX_Control(pDX, IDC_EDITRED, m_EditRed);
	DDX_Control(pDX, IDC_EDITGREEN, m_EditGreen);
	DDX_Control(pDX, IDC_EDITBLUE, m_EditBlue);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CColorSnapDlg, CDialog)
	//{{AFX_MSG_MAP(CColorSnapDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ABOUT, OnAbout)
	ON_BN_CLICKED(IDC_ColorPicker, OnColorPicker)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CColorSnapDlg message handlers
//********************************************************************************
//* 名称：OnInitDialog
//* 功能：初始化对话框
//********************************************************************************
BOOL CColorSnapDlg::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
	
	//设置位图按钮
	m_About.LoadBitmaps(IDB_BUTTON,5, 5, 5, 5, 4 );
	m_OK.LoadBitmaps(IDB_BUTTON,5, 5, 5, 5, 4 );
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CColorSnapDlg::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 CColorSnapDlg::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 CColorSnapDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//********************************************************************************
//* 名称：OnAbout
//* 功能：弹出关于对话框
//********************************************************************************
void CColorSnapDlg::OnAbout() 
{
	CAboutDlg dlg;
	dlg.DoModal();
}

//********************************************************************************
//* 名称：OnColorPicker
//* 功能：进行拾取操作时
//********************************************************************************
void CColorSnapDlg::OnColorPicker() 
{
	 if (m_ColorPicker.GetCheck())
    {
        SetWindowPos(&wndTopMost, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
        SetTimer(1, 80, NULL);
    }
    else
    { 
        SetWindowPos(&wndNoTopMost, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
        KillTimer(1);
    }
}

//********************************************************************************
//* 名称：OnTimer
//* 功能：在此动态拾取屏幕颜色到编辑框中
//********************************************************************************
void CColorSnapDlg::OnTimer(UINT nIDEvent) 
{
	if (nIDEvent != 1)
        return;
    
    CPoint pt;
    GetCursorPos(&pt);

    HDC hDC = ::GetDC(NULL);
    COLORREF clr = ::GetPixel(hDC, pt.x, pt.y);
    
	CString ClrText;
    ClrText.Format("%d",GetRValue(clr));
	m_EditRed.SetWindowText(ClrText);
	ClrText.Format("%d",GetGValue(clr));
	m_EditGreen.SetWindowText(ClrText);
	ClrText.Format("%d",GetBValue(clr));
	m_EditBlue.SetWindowText(ClrText);
   
    ::ReleaseDC(NULL, hDC);
	
	CDialog::OnTimer(nIDEvent);
}