C language handwritten qq-ai version

1. Project introduction

Use C Language implementation Tencent QQ Interface style chat software , Realization AI dialogue .

2. Project objectives

1. master C The basic method of language developing client software

2. master C Language to achieve user interface rendering 、 The underlying mechanism of user interface response

3. Master the basic concepts of network programming

4. Master the basic usage of multithreaded development

Suitable for beginners “ Upgrading project ”

3. Project presentations

Start acting

5. Learning conditions

Have mastered C Basic usage of language :

Variable 、 character string , conditional if, Loop statement for/while And so on

If not C Language foundation , It is suggested to study first 【 Zero basis -5 Introduction to heaven C Language 】

https://ke.qq.com/webcourse/index.html#cid=377567&term_id=100449934&taid=3062105523995359

6. Project framework

 

7. Project preparation

1. Install well VS2019 perhaps VS2010

VS2010 Download address ：

https://ke.qq.com/webcourse/index.html?cw_id=339501&ac_type=3#cid=377567&term_id=100449934

2019 Download address ：https://ke.qq.com/webcourse/index.html?cw_id=339498&ac_type=3#cid=377567&term_id=100449934&taid=11919268686185183&type=1024

2. Install well easyx

Easyx- Apply to VS2019 edition ：

https://ke.qq.com/webcourse/index.html?cw_id=339507&ac_type=3#cid=377567&term_id=100449934&taid=11919272981152479&type=1024

Easyx- apply VS2019 The following version :

https://ke.qq.com/webcourse/index.html?cw_id=339508&ac_type=3#cid=377567&term_id=100449934&taid=11919277276119775&type=1024

3. Get project materials

1. Picture material

2. The library files

 

1. Client project implementation

1. Create an empty project

2. Import material

Import material res Directory to the project directory .

3. Add para 3 Square library file

tx_qq.lib

tx_qq.h

#include "tx_qq.h" #pragma comment(lib, "tx_qq.lib") int main(void) { printf("hello world\n"); return 0; }

4. Enter opposite party IP Address

char ip_addr[32]; int main(void) { printf(" Please input the  IP  Address : "); scanf_s("%s", ip_addr, sizeof(ip_addr)); return 0; }

IP What's the address ？

5. Initialization before network communication

5.1 Quick start to network development

What is network protocol

The most commonly used network protocol TCP And UDP

 

What is? IP Address

  What is a port

Port number , Namely “ In the same place , Ask what service you need ”

298 service

198 service

 

The most commonly used port number ：

80 port - WEB service

www.baidu.com Namely www.baidu.com:80

What is socket

【IP + Port number 】 Combine into one “ Socket ” , This “ Socket ” It's sockets

Use “ Socket ”, send data / receive data

 

5.2 Initialization before network communication

1） Specify the network protocol

2） Set the network address

3） Specify the port for communication

4） Specifies the of the opposite end IP Address

5） Create socket

SOCKET
serverSocket;
sockaddr_in sockAddr;
#define PORT 2021
#include <winsock.h>
#pragma comment(lib, "ws2_32.lib")

 

Call initialization function

int main(void) { 

printf(" Please input the  IP  Address : "); 

scanf_s("%s", ip_addr, sizeof(ip_addr));
if (!TCPInit(&serverSocket, &sockAddr, ip_addr, PORT)) { printf(" Network initialization failed !\n"); return -1; }return 0; }

6. Connect qiniu customer service terminal

void connect() { //  Connect to the server side （ Initiate a network connection request ） connect(serverSocket, (SOCKADDR*)&sockAddr, sizeof(sockAddr)); printf(" Have access to ！\n"); }

 

call connect

int main(void) { printf(" Please input the  IP  Address : "); scanf_s("%s", ip_addr, sizeof(ip_addr)); if (!init()) { printf(" Network initialization failed !\n"); return -1; }printf(" Connecting qiniu customer service ...\n"); connect(); return 0; }

7. Initialize graphics QQ

HWND hwnd; //  Chat window handle  int screenWidth; int screenHeight; int msgHeight; //  New bubble  y  coordinate  IMAGE imgBg; // Chat window background  IMAGE imageArrows[2]; // Arrow of bubble  IMAGE imageHeads[2]; // The head of the character  //  Three buttons  Button btnClose; Button btnTitle; Button btnSend; void initUI() { // 1.  Create a chat window  initgraph(WINDOW_WIDTH, WINDOW_HEIGHT, EW_SHOWCONSOLE); //  Create a drawing window  setbkmode(TRANSPARENT); // 2.  Move window position  screenWidth = GetSystemMetrics(SM_CXSCREEN); screenHeight = GetSystemMetrics(SM_CYSCREEN); hwnd = GetHWnd(); // Gets the current window handle  SetWindowLong( // Set window properties  hwnd, GWL_STYLE, // Set a new window style . //GetWindowLong  Get the properties of the specified serial port  GetWindowLong(hwnd, GWL_STYLE) - WS_CAPTION);//WS_CAPTION  Window style with title bar  MoveWindow(hwnd, screenWidth / 8, 100, WINDOW_WIDTH, WINDOW_HEIGHT, false); // 3.  Draw a background picture  loadimage(&imgBg, "res/bg.png"); putimage(0, 0, &imgBg); // 4.  Load bubble tail and avatar  loadimage(&imageArrows[0], "res/left_arrow.jpg", 6, 8, true); loadimage(&imageArrows[1], "res/right_arrow.jpg", 6, 8, true); loadimage(&imageHeads[1], "res/niu.jpg", 44, 51, true); loadimage(&imageHeads[0], "res/rock.jpg", 55, 51, true); // 5.  initialization  3  Button 
// 5.1  Initialize the close button  initButton(&btnClose, "res/close_normal.jpg", "res/close_press.jpg", 32, 33, 0); btnClose.x = WINDOW_WIDTH - 32; btnClose.y = 0; // 5.2  Initialize the title button  initButton(&btnTitle, "res/title.jpg", "res/title.jpg", 460, 39, 0); btnTitle.x = 0; btnTitle.y = 0; // 5.3  Initialize the send button  initButton(&btnSend, "res/send_normal.jpg", "res/send_press.jpg", 88, 28, 0); btnSend.x = 337; btnSend.y = 784; // 6.  Initialize bubble position  msgHeight = 120; // 7.  Set the text color of the editing area  setcolor(BLACK); }

Location description ：

call initUI

int main(void) {printf(" Please input the  IP  Address : "); scanf_s("%s", ip_addr, sizeof(ip_addr)); if (!init()) { printf(" Network initialization failed !\n"); return -1; }printf(" Connecting qiniu customer service ...\n"); connect(); initUI(); return 0; }

This code , Used Button Components , actually easyx No, Button Components , Quick start , Develop your own high

Level component ！

8. Create multithreading , Concurrent processing of information editing and information receiving

Program , adopt “ Multithreading ” To achieve “ a ”

 

int main(void) { printf(" Please input the  IP  Address : "); scanf_s("%s", ip_addr, sizeof(ip_addr)); if (!init()) { printf(" Network initialization failed !\n"); return -1; }printf(" Connecting qiniu customer service ...\n"); connect(); initUI(); DWORD threadID = 0; HANDLE handleSecond = CreateThread(NULL, 0, ThreadFuncRcv, 0, 0, &threadID); HANDLE handleEdit = CreateThread(NULL, 0, msgEditHandle, NULL, 0, &threadID); return 0; }

Define thread functions

DWORD WINAPI ThreadFuncRcv(LPVOID param) { return NULL; }DWORD WINAPI msgEditHandle(LPVOID param) { return NULL; }

9. Realize the editing function

DWORD WINAPI msgEditHandle(LPVOID param) { textBox(10, 663, 420, 110, LINE_HEIGHT, WHITE, BLACK, msgEdit, &msgLen); return NULL; }

It cannot be achieved at this time UI Interaction , Other functions have not been realized .

10. Realize the message processing of the interface

void mainUI() { while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Will cause too many mouse messages ,  There's chaos ！switch (m.uMsg) { case WM_MOUSEMOVE: if (checkButtonSelect(&btnTitle, &m)) { } else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); } else { //  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true;
drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { //btnClose.pressed = false; //drawButton(&btnClose); closegraph(); exit(0); }else if (checkButtonSelect(&btnSend, &m)) { }else if (checkButtonSelect(&btnTitle, &m)) { }break; } } }

call mainUI

int main(void) { printf(" Please input the  IP  Address : "); scanf_s("%s", ip_addr, sizeof(ip_addr)); if (!init()) { printf(" Network initialization failed !\n"); return -1; }printf(" Connecting qiniu customer service ...\n"); connect(); initUI(); DWORD threadID = 0; HANDLE handleSecond = CreateThread(NULL, 0, ThreadFuncRcv, 0, 0, &threadID); HANDLE handleEdit = CreateThread(NULL, 0, msgEditHandle, NULL, 0, &threadID); mainUI(); system("pause");
return 0; }

If the server is turned on , You can check the following effects .

1. Editing function ： Chinese Editor , English Editor , Mixed editing , Line break , Backspace to delete

2. Sliding color changing effect of send button and close button

3. The closing function of the closing button

11. Realize the dragging function of the window

It is the same as dragging the client window .

Because the default title bar has been hidden , Therefore, you need to realize the dragging function of the window .

void mainUI() { bool titleDrag = false; // Express “ The title bar ” Whether it is clicked and dragged  int titleLastX; // The last position of the window （X  coordinates ） int titleLastY; // The last position of the window （X  coordinates ） while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Too many mouse messages ,  There's chaos ！switch (m.uMsg) {
case WM_MOUSEMOVE: //  Mouse over the title bar  if (checkButtonSelect(&btnTitle, &m)) { if (btnTitle.pressed == true) { if (titleDrag == false) { //  At this time, the title bar has been clicked and pressed , Preparing to drag  titleLastX = m.x; //  Record the initial coordinates  titleLastY = m.y; titleDrag = true; }else { //  At this time, the title bar has been clicked and pressed , Dragging  //  Calculate the drag offset  int offX = m.x - titleLastX; int offY = m.y - titleLastY; moveWindow(hwnd, offX, offY); //  According to the drag offset , Move the window  } } } else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); } else { //  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { btnTitle.pressed = true; //  Click to press the title bar  }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }
else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { //btnClose.pressed = false; //drawButton(&btnClose); closegraph(); exit(0); }else if (checkButtonSelect(&btnSend, &m)) { }else if (checkButtonSelect(&btnTitle, &m)) { //  Release the title bar button （ Left key up ） btnTitle.pressed = false; titleDrag = false; }break; } } }

The test results .

12. Send a message

Send when the left key is lifted .

msg_t msgAll[5]; int msgCount = 0; int currentMsgIndex = -1; // The index of the latest current message  void mainUI() { bool titleDrag = false; // Express “ The title bar ” Whether it is clicked and dragged  int titleLastX; // The last position of the window （X  coordinates ） int titleLastY; // The last position of the window （X  coordinates ） while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Too many mouse messages ,  There's chaos ！
switch (m.uMsg) { case WM_MOUSEMOVE: //  Mouse over the title bar  if (checkButtonSelect(&btnTitle, &m)) { if (btnTitle.pressed == true) { if (titleDrag == false) { //  At this time, the title bar has been clicked and pressed , Preparing to drag  titleLastX = m.x; //  Record the initial coordinates  titleLastY = m.y; titleDrag = true; }else { //  At this time, the title bar has been clicked and pressed , Dragging  //  Calculate the drag offset  int offX = m.x - titleLastX; int offY = m.y - titleLastY; moveWindow(hwnd, offX, offY); //  According to the drag offset , Move the window  } } } else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); } else { //  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { btnTitle.pressed = true; //  Click to press the title bar  }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose);
}else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { //btnClose.pressed = false; //drawButton(&btnClose); closegraph(); exit(0); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = false; drawButton(&btnSend); int ret = send(serverSocket, msgEdit, msgLen, 0); printf(" Has sent %d  Characters \n", ret); currentMsgIndex = (currentMsgIndex + 1) % (sizeof(msgAll) / sizeof(msgAll[0]));msgEdit[msgLen] = 0; strcpy(msgAll[currentMsgIndex].msg, msgEdit); memset(msgEdit, 0, sizeof(msgEdit)); msgLen = 0; msgAll[currentMsgIndex].type = SEND; msgCount++; //drawMsg(); drawMsg(msgAll, currentMsgIndex, &msgHeight, imageArrows, imageHeads); }else if (checkButtonSelect(&btnTitle, &m)) { //  Release the title bar button （ Left key up ） btnTitle.pressed = false; titleDrag = false; }break; } } }

The test results .

13. Receiving information

DWORD WINAPI ThreadFuncRcv(LPVOID param) { char buff[4096]; while (1) { int ret = recv(serverSocket, buff, sizeof(buff), 0); if (ret <= 0) return false; buff[ret] = 0; // Add string Terminator  printf(" received ：%s\n", buff); currentMsgIndex = (currentMsgIndex + 1) % (sizeof(msgAll) / sizeof(msgAll[0])); strcpy(msgAll[currentMsgIndex].msg, buff); msgAll[currentMsgIndex].type = RECEIVE; msgCount++; //drawMsg(); drawMsg(msgAll, currentMsgIndex, &msgHeight, imageArrows, imageHeads); }return NULL; }

Add sound effects .

14. Summary of client project development

1. Using multithreading , Realize the message processing of the main interface 、 Message reception 、 Information Editor , Three lines execute concurrently .

2. Use the graphics library easyx, Realize the development and use of interface components .

3. Expression function 、 File transfer 、 visual telephone 、 Audio telephone 、 Account login waiting to be improved .

2. Server implementation

1. Create an empty project

2. Import material

Import material res Directory to the project directory .

3. Add para 3 Square library file

tx_qq.lib

tx_qq.h

#include "tx_qq.h" #pragma comment(lib, "tx_qq.lib") int main(void) { printf("hello world\n"); return 0; }

4. Initialization before network communication

initialization ：

1） Initialize network protocol

2） Create socket

3） Set the network address

4） Bind socket

 

#include <winsock.h> #pragma comment(lib, "ws2_32.lib") #define PORT 2021 SOCKET serverSocket; bool init() { WSADATA wsaData; int err = WSAStartup(MAKEWORD(1, 1), &wsaData); if (err != 0) { return false; }serverSocket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); sockaddr_in sockAddr; sockAddr.sin_family = PF_INET; sockAddr.sin_addr.S_un.S_addr = 0; sockAddr.sin_port = htons(PORT); //  Bind socket  bind(serverSocket, (SOCKADDR*)&sockAddr, sizeof(sockAddr)); //  Create a listening queue  listen(serverSocket, 1); return NULL; }

call init

int main() { init(); ...... system("pause"); return 0; }

5. Wait for client to initiate connection

SOCKET clientSock;
void waitAccept() { SOCKADDR client; //  The network address of the monitoring end （ Equivalent to the network address of the client ） int nSize = sizeof(client); printf(" Wait for client to initiate connection ...\n"); clientSock = accept(serverSocket, &client, &nSize); printf(" The client has been connected ！\n"); }

call waitAccept

int main(void) { init(); waitAccept(); return 0; }

6. Initialize graphics QQ

HWND hwnd; //  Chat window handle  int screenWidth; int screenHeight; int msgHeight; //  New bubble  y  coordinate  IMAGE imgBg; // Chat window background  IMAGE imageArrows[2]; // Arrow of bubble  IMAGE imageHeads[2]; // The head of the character  //  Three buttons  Button btnClose; Button btnTitle; Button btnSend; void initUI() { // 1.  Create a chat window  initgraph(WINDOW_WIDTH, WINDOW_HEIGHT, EW_SHOWCONSOLE); //  Create a drawing window  setbkmode(TRANSPARENT); // 2.  Move window position  screenWidth = GetSystemMetrics(SM_CXSCREEN); screenHeight = GetSystemMetrics(SM_CYSCREEN); hwnd = GetHWnd(); // Gets the current window handle  SetWindowLong( // Set window properties 
hwnd, GWL_STYLE, // Set a new window style . //GetWindowLong  Get the properties of the specified serial port  GetWindowLong(hwnd, GWL_STYLE) - WS_CAPTION);//WS_CAPTION  Window style with title bar  MoveWindow(hwnd, screenWidth * 0.7 , 100, WINDOW_WIDTH, WINDOW_HEIGHT, false); // 3.  Draw a background picture  loadimage(&imgBg, "res/bg.png"); putimage(0, 0, &imgBg); // 4.  Load bubble tail and avatar  loadimage(&imageArrows[0], "res/left_arrow.jpg", 6, 8, true); loadimage(&imageArrows[1], "res/right_arrow.jpg", 6, 8, true); loadimage(&imageHeads[0], "res/niu.jpg", 44, 51, true); loadimage(&imageHeads[1], "res/rock.jpg", 55, 51, true); // 5.  initialization  3  Button  // 5.1  Initialize the close button  initButton(&btnClose, "res/close_normal.jpg", "res/close_press.jpg", 32, 33, 0); btnClose.x = WINDOW_WIDTH - 32; btnClose.y = 0; // 5.2  Initialize the title button  initButton(&btnTitle, "res/title.jpg", "res/title.jpg", 460, 39, 0); btnTitle.x = 0; btnTitle.y = 0; // 5.3  Initialize the send button  initButton(&btnSend, "res/send_normal.jpg", "res/send_press.jpg", 88, 28, 0); btnSend.x = 337; btnSend.y = 784; // 6.  Initialize bubble position  msgHeight = 120; // 7.  Set the text color of the editing area  setcolor(BLACK); }

Location description ：

  call initUI

int main(void) { init(); waitAccept(); initUI(); return 0; }

7. Create multithreading , Concurrent processing of information editing and information receiving

int main() { init(); waitAccept(); initUI(); DWORD dwThreadID = 0; HANDLE handleSecond = CreateThread(NULL, 0, ThreadFuncRcv, 0, 0, &dwThreadID); HANDLE handleEdit = CreateThread(NULL, 0, msgEditHandle, NULL, 0, &dwThreadID);
mainUI(); system("pause"); return 0; }

Thread functions

DWORD WINAPI ThreadFuncRcv(LPVOID param) { return NULL; }DWORD WINAPI msgEditHandle(LPVOID param) { return NULL; }

8. Realize the editing function

char msgEdit[1024]; int msgLen; DWORD WINAPI msgEditHandle(LPVOID param) { textBox(10, 663, 420, 110, LINE_HEIGHT, WHITE, BLACK, msgEdit, &msgLen); return NULL; }

It cannot be achieved at this time UI Interaction , Other functions have not been realized .

9. Realize the message processing of the interface

void mainUI() { while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Will cause too many mouse messages ,  There's chaos ！switch (m.uMsg) { case WM_MOUSEMOVE: if (checkButtonSelect(&btnTitle, &m)) { } else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true;
drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); } else { //  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { //btnClose.pressed = false; //drawButton(&btnClose); closegraph(); exit(0); }else if (checkButtonSelect(&btnSend, &m)) { }else if (checkButtonSelect(&btnTitle, &m)) { }
break; } } }

call mainUI

int main(void) { init(); waitAccept(); initUI(); DWORD dwThreadID = 0; HANDLE handleSecond = CreateThread(NULL, 0, ThreadFuncRcv, 0, 0, &dwThreadID); HANDLE handleEdit = CreateThread(NULL, 0, msgEditHandle, NULL, 0, &dwThreadID); mainUI(); return 0; }

10. Realize the dragging function of the window

Because the default title bar has been hidden , Therefore, you need to realize the dragging function of the window .

void mainUI() { bool titleDrag = false; // Express “ The title bar ” Whether it is clicked and dragged  int titleLastX; // The last position of the window （X  coordinates ） int titleLastY; // The last position of the window （X  coordinates ） while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Too many mouse messages ,  There's chaos ！switch (m.uMsg) { case WM_MOUSEMOVE: //  Mouse over the title bar  if (checkButtonSelect(&btnTitle, &m)) { if (btnTitle.pressed == true) { if (titleDrag == false) { //  At this time, the title bar has been clicked and pressed , Preparing to drag  titleLastX = m.x; //  Record the initial coordinates  titleLastY = m.y; titleDrag = true;
}else { //  At this time, the title bar has been clicked and pressed , Dragging  //  Calculate the drag offset  int offX = m.x - titleLastX; int offY = m.y - titleLastY; moveWindow(hwnd, offX, offY); //  According to the drag offset , Move the window  } } } else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); } else { //  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { btnTitle.pressed = true; //  Click to press the title bar  }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { //btnClose.pressed = false;
//drawButton(&btnClose); closegraph(); exit(0); }else if (checkButtonSelect(&btnSend, &m)) { }else if (checkButtonSelect(&btnTitle, &m)) { //  Release the title bar button （ Left key up ） btnTitle.pressed = false; titleDrag = false; }break; } } }

11. Send a message

msg_t msgAll[5]; int msgCount = 0; int currentMsgIndex = -1; // The index of the latest current message  void mainUI() { bool titleDrag = false; // Express “ The title bar ” Whether it is clicked and dragged  int titleLastX; // The last position of the window （X  coordinates ） int titleLastY; // The last position of the window （X  coordinates ） while (1) { MOUSEMSG m = GetMouseMsg(); FlushMouseMsgBuffer(); // It can't be less , Suffix quickly drag the title button at the top , Will cause too many mouse messages ,  There's chaos ！switch (m.uMsg) { case WM_MOUSEMOVE: if (checkButtonSelect(&btnTitle, &m)) { if (btnTitle.pressed == true) { if (titleDrag == false) { //  At this time, the title bar has been clicked and pressed , Preparing to drag  titleLastX = m.x; //  Record the initial coordinates  titleLastY = m.y; titleDrag = true; }else { //  At this time, the title bar has been clicked and pressed , Dragging 
//  Calculate the drag offset  int offX = m.x - titleLastX; int offY = m.y - titleLastY; moveWindow(hwnd, offX, offY); //  According to the drag offset , Move the window  } } }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }else {//  Check whether the mouse moves from inside the button to outside the button  if (btnClose.pressed == true) { //  Move the mouse away from the close button  btnClose.pressed = false; drawButton(&btnClose); }if (btnSend.pressed == true) { //  Move the mouse away from the send button  btnSend.pressed = false; drawButton(&btnSend); } }break; case WM_LBUTTONDOWN: if (checkButtonSelect(&btnTitle, &m)) { btnTitle.pressed = true; //  Click to press the title bar  }else if (checkButtonSelect(&btnClose, &m)) { btnClose.pressed = true; drawButton(&btnClose); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = true; drawButton(&btnSend); }break; case WM_LBUTTONUP: if (checkButtonSelect(&btnClose, &m)) { closegraph();
exit(0); }else if (checkButtonSelect(&btnSend, &m)) { btnSend.pressed = false; drawButton(&btnSend); //int ret = send(serverSocket, msgEdit, msgLen, 0); int ret = send(clientSock, msgEdit, msgLen, 0); printf(" Has sent %d  Characters \n", ret); currentMsgIndex = (currentMsgIndex + 1) % (sizeof(msgAll) / sizeof(msgAll[0]));msgEdit[msgLen] = 0; strcpy(msgAll[currentMsgIndex].msg, msgEdit); memset(msgEdit, 0, sizeof(msgEdit)); msgLen = 0; msgAll[currentMsgIndex].type = SEND; msgCount++; //drawMsg(); drawMsg(msgAll, currentMsgIndex, &msgHeight, imageArrows, imageHeads); }else if (checkButtonSelect(&btnTitle, &m)) { //  Release the title bar button （ Left key up ） btnTitle.pressed = false; titleDrag = false; }break; } } }

12. Receiving information

DWORD WINAPI ThreadFuncRcv(LPVOID param) { while (1) { char buff[1024]; int ret = recv(clientSock, buff, sizeof(buff), 0); if (ret <= 0) { printf(" The other party is offline \n");
closesocket(clientSock); //TerminateThread(); waitAccept(); }else {buff[ret] = 0; printf("[ received ] %s\n", buff); currentMsgIndex = (currentMsgIndex + 1) % (sizeof(msgAll) / sizeof(msgAll[0])); strcpy(msgAll[currentMsgIndex].msg, buff); msgAll[currentMsgIndex].type = RECEIVE; msgCount++; //drawMsg(); drawMsg(msgAll, currentMsgIndex, &msgHeight, imageArrows, imageHeads); } }return NULL; }

3. Project upgrade

Full version QQ Project presentations

https://www.bilibili.com/video/BV1ua4y1n73P

Concurrency and synchronization of multithreads

Edit thread , Accept message thread , The main thread , There is no mutual exclusion of shared resources , Theoretically, there are technical risks .

Solution , Realize mutually exclusive access to multi-threaded shared resources （ such as ：easyx Color control ）.

One in ten thousand BUG probability （ I haven't met ）

High concurrency implementation of the server

Millions of concurrent , It is a telecom enterprise project .

Realization of other functions

Video chat

Voice chat

File transfer

Remote control

......

---

Today's sharing is here , Everyone should study hard C Language /C++ yo ~

Welcome to change careers and learn programming partners , Using more information to learn and grow faster than thinking about it yourself ！
For preparing to learn C/C++ Programming partners , If you want to better improve your core programming skills （ Internal skill ） From now on ！
Organize and share （ Years of learning source code 、 Project practice video 、 Project notes , Introduction to Basics ） Add the group below to get ~
C Language C++ Programming learning communication circle ,QQ Group ：763855696 【 Click to enter 】

C Language from entry to mastery （C Introduction to language C Language course C Language zero basis C Language foundation C Language learning C