ex8dlg.cpp

从学案例入手

// Ex8Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex8.h"
#include "Ex8Dlg.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()

/////////////////////////////////////////////////////////////////////////////
// CEx8Dlg dialog

CEx8Dlg::CEx8Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEx8Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEx8Dlg)
		// 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 CEx8Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx8Dlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEx8Dlg, CDialog)
	//{{AFX_MSG_MAP(CEx8Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_ADDCLR, OnAddClr)
	ON_WM_DRAWITEM()
	ON_BN_CLICKED(IDC_CHGCLR, OnChgClr)
	ON_CBN_SELCHANGE(IDC_CLRCOMBO, OnSelChangeClrCombo)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx8Dlg message handlers

BOOL CEx8Dlg::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
	m_clrCombo.SubclassDlgItem(IDC_CLRCOMBO, this);
	GetDlgItem(IDC_CLRSTATIC)->ModifyStyle(0, SS_OWNERDRAW);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEx8Dlg::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 CEx8Dlg::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 CEx8Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CEx8Dlg::OnAddClr() 
{
	// TODO: Add your control notification handler code here
	CColorDialog dlg(0, 0, this);
	int iRes=dlg.DoModal();
	if (iRes==IDOK)	{
		COLORREF cr=dlg.GetColor();
		m_clrCombo.AddString((LPCTSTR)cr);
	}
}


void CEx8Dlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	// TODO: Add your message handler code here and/or call default
	CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
	if (nIDCtl==IDC_CLRSTATIC)
	{
		CDC *pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
		CBrush br(m_crClrStatic);
		CRect rc=lpDrawItemStruct->rcItem;
		pDC->FillRect(&rc, &br);
	}

}


void CEx8Dlg::OnChgClr() 
{
	// TODO: Add your control notification handler code here
	int nSel=m_clrCombo.GetCurSel();
	COLORREF cr=(COLORREF)m_clrCombo.GetItemData(nSel);
	if (cr!=-1)
	{
		DRAWITEMSTRUCT drawItemStruct;
		drawItemStruct.CtlID=IDC_CLRSTATIC;
		drawItemStruct.hwndItem=GetDlgItem(IDC_CLRSTATIC)->GetSafeHwnd();
		drawItemStruct.hDC=::GetDC(drawItemStruct.hwndItem);
		GetDlgItem(IDC_CLRSTATIC)->GetClientRect(&(drawItemStruct.rcItem));
		m_crClrStatic=cr;
		OnDrawItem(IDC_CLRSTATIC, &drawItemStruct);
	}
}


void CEx8Dlg::OnSelChangeClrCombo() 
{
	// TODO: Add your control notification handler code here
	OnChgClr();
}