colrbutndlg.cpp

这个是我们学校用的VC++教案

// ColrButnDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ColrButn.h"
#include "ColrButnDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CColrButnDlg dialog

CColrButnDlg::CColrButnDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CColrButnDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CColrButnDlg)
	m_nColor = 0;     // 原来的初始值为-1
	m_bBlue = FALSE;
	m_bGreen = FALSE;
	m_bRed = FALSE;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CColrButnDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CColrButnDlg)
	DDX_Radio(pDX, IDC_RADIOCLR, m_nColor);
	DDX_Check(pDX, IDC_CHECKBLUE, m_bBlue);
	DDX_Check(pDX, IDC_CHECKGREEN, m_bGreen);
	DDX_Check(pDX, IDC_CHECKRED, m_bRed);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CColrButnDlg, CDialog)
	//{{AFX_MSG_MAP(CColrButnDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTNAPPLY, OnButnapply)
	ON_WM_DRAWITEM()
	ON_BN_CLICKED(IDC_RADIOBLK, OnRadioblk)
	ON_BN_CLICKED(IDC_RADIOCLR, OnRadioclr)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CColrButnDlg message handlers

BOOL CColrButnDlg::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
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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


void CColrButnDlg::OnRadioblk()    // 单击“单色”按钮的消息处理函数
{
	// TODO: Add your control notification handler code here
	CWnd  *pWndButn;
	pWndButn=GetDlgItem(IDC_CHECKRED);   // 获得复选框对象的指针
	pWndButn->EnableWindow(FALSE);      // 禁用复选框，下同
	pWndButn=GetDlgItem(IDC_CHECKGREEN);
	pWndButn->EnableWindow(FALSE);
	pWndButn=GetDlgItem(IDC_CHECKBLUE);
	pWndButn->EnableWindow(FALSE);
}

void CColrButnDlg::OnRadioclr()    // 单击“彩色”按钮的消息处理函数
{
	// TODO: Add your control notification handler code here
	CWnd  *pWndButn;
	pWndButn=GetDlgItem(IDC_CHECKRED);
	pWndButn->EnableWindow();            // 可以使用复选框，下同
	pWndButn=GetDlgItem(IDC_CHECKGREEN);
	pWndButn->EnableWindow();
	pWndButn=GetDlgItem(IDC_CHECKBLUE);
	pWndButn->EnableWindow();	
}

void CColrButnDlg::OnButnapply()    // 单击"应用"按钮的消息处理函数
{
	// TODO: Add your control notification handler code here
	CWnd  *pWndButn=GetDlgItem(IDC_BUTNDRAW);
	pWndButn->Invalidate();    // 使按钮区域无效
	pWndButn->UpdateWindow();	// 发送WM_PAINT消息，更新无效区域
}

void CColrButnDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your message handler code here and/or call default
    UpdateData();     // 利用DDX得到单选按钮和复选框成员变量的值
	COLORREF  clrButn;
	if(m_nColor==0)         // 彩色模式，选择具体的颜色
		clrButn=RGB(m_bRed?255:0,m_bGreen?255:0,m_bBlue?255:0);
	else
		clrButn=RGB(0,0,0);     // 单色
	CDC  dc;
	dc.Attach(lpDrawItemStruct->hDC);    // 连接句柄
	if(nIDCtl==IDC_BUTNDRAW)
	{
        CWnd  *pWndButn=GetDlgItem(IDC_BUTNDRAW);
	    CRect  rectButn;
		pWndButn->GetClientRect(&rectButn);   // 获取按钮所占区域
		dc.FillSolidRect(&rectButn, clrButn);    // 绘制按钮
	}
	dc.Detach();      // 分离句柄
	CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
}