Chat software project development 2

Catalog

2.1 Nickname settings  

2.2 Automatic recovery

2.3 Clear the screen

2.4 Button add fault tolerance

2.5 disconnect  

client

Server side

2.6 Change font color  

2.7 The dialog interface inserts a background image  

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2.1 Nickname settings  

  ultimate objective

Configure nickname principle

1. Start client , There should be an operation to read the configuration file , Read the nickname from the configuration file to the control

2. Customer configuration nickname , Need to write to the configuration file

In the nickname save control function

void CMFCChatClientDlg::OnBnClickedSavenameBtn()
{
	// Get the contents of the text box 
	CString strName;
	GetDlgItemText(IDC_NAME_EDIT, strName);
	// Determine whether the nickname box is empty 
	if (strName.GetLength() <= 0) {
		MessageBox(_T(" The nickname cannot be empty ！"));
		return;
	}
	//MB_OKCANCEL Indicates that the message box is OK/CANCEL key , User choice OK entering if sentence 
	if (IDOK == AfxMessageBox(_T(" Whether to modify the nickname "), MB_OKCANCEL)) {
		// Save nicknames 
		// About the definition of path array , Built in 260 size 
		WCHAR strPath[MAX_PATH] = { 0 };
		// Get the current path 
		GetCurrentDirectoryW(MAX_PATH, strPath);

		//L"%s" It also represents wide bytes , If it is "%ls" It is found that all contents cannot be output 
		TRACE(L"#####strPath= %s", strPath);

		CString strFilePath;
		// Capitalization L Represents wide bytes ,.ini Represents a configuration file 
		strFilePath.Format(L"%ls//Test.ini", strPath);

		// Write a string in the configuration file 
		WritePrivateProfileStringW(_T("CLIENT"), _T("NAME"), strName, strFilePath);
		//WritePrivateProfileStringW(
		//	_In_opt_ LPCWSTR lpAppName,	 Item name 
		//	_In_opt_ LPCWSTR lpKeyName,	 Key name 
		//	_In_opt_ LPCWSTR lpString,
		//	_In_opt_ LPCWSTR lpFileName
		//);
	}

}

In the initialization frame function OnInitDlg

// Get nickname from configuration file 
WCHAR strPath[MAX_PATH] = { 0 };
GetCurrentDirectoryW(MAX_PATH, strPath);
CString strFilePath;
strFilePath.Format(L"%ls//Test.ini", strPath);
// Get a nickname 
WCHAR wszName[MAX_PATH] = { 0 };
DWORD dwNum = GetPrivateProfileStringW(_T("CLIENT"), _T("NAME"), NULL, wszName, MAX_PATH, strFilePath);
if (dwNum > 0) {
	// I read 
	// Displayed in the nickname box 
	GetDlgItem(IDC_NAME_EDIT)->SetWindowText(wszName);
}
else {
	// Not read or the file is damaged 
	// First, write a casually in the file , Then display in the nickname box 
	WritePrivateProfileStringW(_T("CLIENT"), _T("NAME"), _T(" client "), strFilePath);
	GetDlgItem(IDC_NAME_EDIT)->SetWindowText(_T(" client "));
}
//GetPrivateProfileStringW(
//	_In_opt_ LPCWSTR lpAppName,	 Item name 
//	_In_opt_ LPCWSTR lpKeyName,	 Key name 
//	_In_opt_ LPCWSTR lpDefault,	 The default value is 
//	_Out_writes_to_opt_(nSize, return +1) LPWSTR lpReturnedString,	 One Buff, Get the content to buff in 
//	_In_     DWORD nSize,
//	_In_opt_ LPCWSTR lpFileName
//);

2.2 Automatic recovery

In the receiving function of the client , If the user chooses to send messages automatically , Then send the content in the message box to the server , Then display this message in the history message box

On the client side OnReceive Supplementary code in function

// Automatic recovery 
// If checked, 
if (((CButton*)dlg->GetDlgItem(IDC_AUTOSEND_RADIO))->GetCheck()) {
	//1. Read the contents of the edit box 
	CString strAutoSendMsg;
	dlg->GetDlgItemText(IDC_AUTOSEND_RADIO, strAutoSendMsg);
	//2. Packet + Group format 
	CString strName;
	dlg->GetDlgItemTextW(IDC_NAME_EDIT, strName);
	// Time + nickname +[ Automatic recovery ]+ Content 
	CString strMsg = strName + _T("：") + _T("[ Automatic recovery ]") + strAutoSendMsg;
	char* szSendBuf = T2A(strMsg);
	// Send it to the server 
	dlg->m_client->Send(szSendBuf, SEND_MAX_BUF, 0);
	// Displayed in the list box 
	CString strShow;
	strShow = dlg->CatShowString(_T(""), strMsg);
	dlg->m_list.AddString(strShow);

}

Add the control function of automatic reply

// Automatic recovery 
void CMFCChatClientDlg::OnBnClickedAutosendRadio()
{
	if (((CButton*)GetDlgItem(IDC_AUTOSEND_RADIO))->GetCheck()) {
		TRACE("#### Choose ");
		((CButton*)GetDlgItem(IDC_AUTOSEND_RADIO))->SetCheck(FALSE);
	}
	else {
		TRACE("##### For the selection ");
		((CButton*)GetDlgItem(IDC_AUTOSEND_RADIO))->SetCheck(TRUE);
	}
}

2.3 Clear the screen

Only need to use under the corresponding control function ResetControl Function  

2.4 Button add fault tolerance

When the client or server starts , Some buttons except the connection control should be grayed out , Prevent the program from crashing

GetDlgItem(IDC_SEND_BTN)->EnableWindow(FALSE);
// The disconnect button is grayed out 
GetDlgItem(IDC_DISCONNECT_BTN)->EnableWindow(FALSE);
// Automatically reset the gray 
GetDlgItem(IDC_AUTOSEND_CHECK)->EnableWindow(FALSE);
// The connect button is available 
GetDlgItem(IDC_CONNECT_BTN)->EnableWindow(TRUE);

2.5 disconnect  

client

In the disconnect control function

void CMFCChatClientDlg::OnBnClickedDisconnectBtn()
{
	//1. Control controls 

	GetDlgItem(IDC_SEND_BTN)->EnableWindow(FALSE);
	// The disconnect button is grayed out 
	GetDlgItem(IDC_DISCONNECT_BTN)->EnableWindow(FALSE);
	// Automatically reset the gray 
	GetDlgItem(IDC_AUTOSEND_CHECK)->EnableWindow(FALSE);
	// The connect button is available 
	GetDlgItem(IDC_CONNECT_BTN)->EnableWindow(TRUE);

	//2. Recycle resources 
	m_client->Close();
	if (m_client != NULL) {
		delete m_client;
		m_client = NULL;
	}

	//3. Display to the list box 
	CString strShow;
	strShow = CatShowString(_T(""), _T(" Disconnect from the server "));
	m_list.AddString(strShow);
	UpdateData(FALSE);
}

Server side

In the disconnect control function

void CMFCChartServerDlg::OnBnClickedStopBtn()
{
	//1. Control controls 
	GetDlgItem(IDC_START_BTN)->EnableWindow(TRUE);
	GetDlgItem(IDC_STOP_BTN)->EnableWindow(FALSE);
	GetDlgItem(IDC_SEND_BTN)->EnableWindow(FALSE);

	//2. Recycle resources 
	m_server->Close();
	if (m_server != NULL) {
		delete m_server;
		m_server = NULL;
	}
	if (m_chat != NULL) {
		delete m_chat;
		m_chat = NULL;
	}

	//3. Displayed in the list box 
	CString strShow;
	strShow = CatShowString(_T(""), _T(" The server stops "));
	m_list.AddString(strShow);
	UpdateData(FALSE);

}

2.6 Change font color  

Bind member variables to the control , Add colors to the initialization function and set the default options

m_WordColorCombo.AddString(_T(" black "));
m_WordColorCombo.AddString(_T(" Red "));
m_WordColorCombo.AddString(_T(" Blue "));
m_WordColorCombo.AddString(_T(" green "));
// Set the current selection to 0 individual 
m_WordColorCombo.SetCurSel(0);
SetDlgItemText(IDC_COLOUR_COMBO, _T(" black "));

Set the control color response function

HBRUSH CMFCChatClientDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
	HBRUSH hbr = CDialogEx::OnCtlColor(pDC, pWnd, nCtlColor);
	CString strColor;
	m_WordColorCombo.GetWindowTextW(strColor);
	//GetDlgCtrlID Returns a pointer to a given control or child window , There is no return NULL 
	if (IDC_LIST1 == pWnd->GetDlgCtrlID() || IDC_SENDMSG_EDIT == pWnd->GetDlgCtrlID()) {
		if (strColor == L" black ") {
			pDC->SetTextColor(RGB(0, 0, 0));
		}
		else if (strColor == L" Red ") {
			pDC->SetTextColor(RGB(255, 0, 0));
		}
		else if (strColor == L" green ") {
			pDC->SetTextColor(RGB(0, 255, 255));
		}
		else if (strColor == L" Blue ") {
			pDC->SetTextColor(RGB(0, 0, 255));
		}
	}
	return hbr;
}

2.7 The dialog interface inserts a background image  

stay OnPaint Function  

// Determine the target area → Load the resource image and convert it to a memory device → mapping 
		//1. Definition dc
		CPaintDC dc(this); //  Device context for drawing 
		//2. Determine the drawing area 
		CRect rect;
		GetClientRect(&rect);	// Get the dialog area 
		//3. Create a memory device environment   Create compatibility dc
		CDC dcBmp;
		dcBmp.CreateCompatibleDC(&dcBmp);


		//4. Load resource pictures 
		CBitmap bmpBackGround;
		bmpBackGround.LoadBitmap(IDB_BITMAP);
		//5. Load the picture Ziyun into the bitmap bBitMap Bitmap 
		BITMAP bBitmap;
		bmpBackGround.GetBitmap(&bBitmap);

		//6. Select the bitmap into the temporary memory device environment 
		CBitmap* pbmpOld = dcBmp.SelectObject(&bmpBackGround);

		//7. Began to draw 
		dc.StretchBlt(0, 0, rect.Width(), rect.Height(), &dcBmp, 0, 0, bBitmap.bmWidth, bBitmap.bmHeight, SRCCOPY);