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請問各位高手emit的問題 [复制链接]

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离线sdaaron
新手上路
 
只看楼主 正序阅读 楼主  发表于: 2009-08-12
小弟最近由書本範例改自己想要的聊天室程式
遇到一個問題，就是使用emit去呼叫，但都沒作用
由rtu_server.cpp中的emit send2Client(txtSend,length);
但都沒反應～
請各位高手幫我看看看哪裡出問題～感謝 ！

复制代码
  1. //rtu_server.h
  2. #ifndef RTU_SERVER_H
  3. #define RTU_SERVER_H
  4. #include <QtGui/QWidget>
  5. #include "ui_rtu_server.h"
  6. #include "server.h"
  7. class RTU_Server : public QWidget
  8. {
  9. Q_OBJECT
  10. public:
  11. RTU_Server(QWidget *parent = 0);
  12. ~RTU_Server();
  13. public:
  14. QListWidget *ListWidgetContent;
  15. QLabel* LabelPort;
  16. QLineEdit* LineEditPort;
  17. QPushButton* PushButtonCreate;
  18. int port;
  19. Server *server;
  20. QString txtSend;
  21. signals:
  22. void send2Client(QString,int);
  23. public slots:
  24. void slotCreateServer();
  25. void updateServer(QString,int);
  26. void slotSend2Client();
  27. private:
  28. Ui::RTU_ServerClass ui;
  29. };
  30. #endif
  34. //rtu_server.cpp
  35. #include "rtu_server.h"
  36. #include "server.h"
  37. RTU_Server::RTU_Server(QWidget *parent)
  38. : QWidget(parent)
  39. {
  40. ui.setupUi(this);
  41. connect(ui.PushButtonCreate,SIGNAL(clicked()),this,SLOT(slotCreateServer()));
  42. port = 8010;
  43. ui.LineEditPort->setText(QString::number(port));
  44. ui.PushButtonSend->setEnabled(false);
  45. connect(ui.PushButtonSend,SIGNAL(clicked()),this,SLOT(slotSend2Client()));
  46. }
  48. RTU_Server::~RTU_Server()
  49. {
  51. }
  53. void RTU_Server::slotCreateServer()
  54. {
  55. server = new Server(this,port);
  56. connect(server,SIGNAL(updateServer(QString,int)),this,SLOT(updateServer(QString,int)));
  57. ui.PushButtonCreate->setEnabled(false);
  58. ui.PushButtonSend->setEnabled(true);
  59. }
  61. void RTU_Server::updateServer(QString msg,int length)
  62. {
  63. ui.ListWidgetContent->addItem (msg.left(length) );
  64. }
  66. void RTU_Server::slotSend2Client()
  67. {
  68. txtSend = "Server:" + ui.LineEditSend->text();
  69. int length = 0;
  70. emit send2Client(txtSend,length);
  71. ui.LineEditSend->clear();
  72. ui.ListWidgetContent->addItem (txtSend);
  73. }
  76. //server.h
  77. #ifndef SERVER_H
  78. #define SERVER_H
  79. #include <QtNetwork>
  80. #include "tcpclientsocket.h"
  81. class Server : public QTcpServer
  82. {
  83. Q_OBJECT
  84. public:
  85. Server(QObject *parent = 0,int port=0);
  86. QList<TcpClientSocket*> tcpClientSocketList;
  87. signals:
  88. void updateServer(QString,int);
  89. public slots:
  90. void updateClients(QString,int);
  91. void slotDisconnected(int);
  92. void send2Client(QString,int);
  93. protected:
  94. void incomingConnection(int socketDescriptor);
  95. };
  96. #endif
  99. //server.cpp
  100. #include <QtNetwork>
  101. #include "server.h"
  102. Server::Server(QObject *parent,int port)
  103. : QTcpServer(parent)
  104. {
  105. listen(QHostAddress::Any,port);
  106. }
  108. void Server::incomingConnection(int socketDescriptor)
  109. {
  110. TcpClientSocket *tcpClientSocket = new TcpClientSocket(this);
  111. connect(tcpClientSocket,SIGNAL(updateClients(QString,int)),this,SLOT(updateClients(QString,int)));
  112. connect(tcpClientSocket,SIGNAL(disconnected(int)),this,SLOT(slotDisconnected(int)));
  113. tcpClientSocket->setSocketDescriptor(socketDescriptor);
  114. tcpClientSocketList.append(tcpClientSocket);
  115. }
  117. void Server::updateClients(QString msg,int length)
  118. {
  119. emit updateServer(msg,length);
  120. }
  122. void Server::send2Client(QString msg,int length)
  123. {
  124. for(int i=0;i<tcpClientSocketList.count();i++)
  125. {
  126. QTcpSocket *item=tcpClientSocketList.at(i);
  127. if(item->write(msg.toLatin1(), length)!=length)
  128. {
  129. continue ;
  130. }
  131. }
  132. }
  134. void Server::slotDisconnected(int descriptor)
  135. {
  136. for(int i=0;i<tcpClientSocketList.count();i++)
  137. {
  138. QTcpSocket *item=tcpClientSocketList.at(i);
  139. if(item->socketDescriptor ()==descriptor)
  140. {
  141. tcpClientSocketList.removeAt(i);
  142. return;
  143. }
  144. }
  145. return;
  146. }
  149. //tcpclientsocket.h
  150. #ifndef TCPCLIENTSOCKET_H
  151. #define TCPCLIENTSOCKET_H
  152. #include <QtGui>
  153. #include <QtNetwork>
  154. class TcpClientSocket : public QTcpSocket
  155. {
  156. Q_OBJECT
  157. public:
  158. TcpClientSocket( QObject *parent=0);
  159. ~TcpClientSocket();
  160. signals:
  161. void updateClients(QString,int);
  162. void disconnected(int);
  163. protected slots:
  164. void dataReceived();
  165. void slotDisconnected();
  166. };
  167. #endif
  170. //tcpclientsocket.cpp
  171. #include "rtu_server.h"
  172. TcpClientSocket::TcpClientSocket( QObject *parent)
  173. {
  174. connect(this, SIGNAL(readyRead()),this, SLOT(dataReceived()));
  175. connect(this, SIGNAL(disconnected()),this, SLOT(slotDisconnected()));
  176. }
  178. TcpClientSocket::~TcpClientSocket()
  179. {
  180. }
  182. void TcpClientSocket::dataReceived()
  183. {
  184. while (bytesAvailable()>0)
  185. {
  186. char buf[1024];
  187. int length=bytesAvailable();
  188. read(buf, length);
  189. QString msg=buf;
  190. emit updateClients(msg,length);
  191. }
  192. }
  194. void TcpClientSocket::slotDisconnected()
  195. {
  196. emit disconnected(this->socketDescriptor ());
  197. }
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离线bingogo
侠客
只看该作者 1楼 发表于: 2009-08-13
加一些调试语句，看输出
qDebug( )  << "  ....  ";
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