ex_citydlg.cpp

Visual C++应用教程-源代码 本书在复习C++基础知识后

// Ex_CityDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Ex_City.h"
#include "Ex_CityDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CEx_CityDlg dialog

CEx_CityDlg::CEx_CityDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CEx_CityDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CEx_CityDlg)
	m_dwZipCode = 0;
	m_strCity = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CEx_CityDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx_CityDlg)
	DDX_Control(pDX, IDC_LIST1, m_ListBox);
	DDX_Text(pDX, IDC_EDIT_ZIP, m_dwZipCode);
	DDV_MinMaxDWord(pDX, m_dwZipCode, 100000, 999999);
	DDX_Text(pDX, IDC_EDIT_CITY, m_strCity);
	DDV_MaxChars(pDX, m_strCity, 40);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEx_CityDlg, CDialog)
	//{{AFX_MSG_MAP(CEx_CityDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_ADD, OnButtonAdd)
	ON_BN_CLICKED(IDC_BUTTON_DEL, OnButtonDel)
	ON_LBN_SELCHANGE(IDC_LIST1, OnSelchangeList1)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx_CityDlg message handlers

BOOL CEx_CityDlg::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_dwZipCode = 100000;		// 设置初始的邮政编码
	UpdateData( FALSE );			// 将邮政编码显示在控件中
	GetDlgItem(IDC_BUTTON_DEL)->EnableWindow( FALSE );	// 使[删除]按钮灰显
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

BOOL CEx_CityDlg::IsValidate()
{
	UpdateData();
	m_strCity.TrimLeft();
	if (m_strCity.IsEmpty()) {
		MessageBox("城市名输入无效！");	return FALSE;
	}
	return TRUE;

}

void CEx_CityDlg::OnButtonAdd() 
{
	// TODO: Add your control notification handler code here
	if (!IsValidate()) return;
	int nIndex = m_ListBox.FindStringExact( -1, m_strCity );
	if (nIndex != LB_ERR ){
		MessageBox("该城市已添加！");		return;
	}
	nIndex = m_ListBox.AddString( m_strCity );
	m_ListBox.SetItemData( nIndex, m_dwZipCode ); 
}

void CEx_CityDlg::OnButtonDel() 
{
	// TODO: Add your control notification handler code here
	int nIndex = m_ListBox.GetCurSel();
	if (nIndex != LB_ERR ) m_ListBox.DeleteString( nIndex );
	else	GetDlgItem(IDC_BUTTON_DEL)->EnableWindow( FALSE );
}

void CEx_CityDlg::OnSelchangeList1() 
{
	// TODO: Add your control notification handler code here
	int nIndex = m_ListBox.GetCurSel();
	if (nIndex != LB_ERR )
	{
		m_ListBox.GetText( nIndex, m_strCity );
		m_dwZipCode = m_ListBox.GetItemData( nIndex );
		UpdateData( FALSE );		// 使用当前列表项所关联的内容显示在控件上
		GetDlgItem(IDC_BUTTON_DEL)->EnableWindow( TRUE );
	}
	
}