A self-contained chat widget. More...
#include <SimpleChatWidget.h>
A self-contained chat widget.
Definition at line 33 of file SimpleChatWidget.h.
typedef std::map<Wt::WString, bool> SimpleChatWidget::UserMap [private] |
Definition at line 68 of file SimpleChatWidget.h.
SimpleChatWidget::SimpleChatWidget | ( | SimpleChatServer & | server, |
Wt::WContainerWidget * | parent = 0 |
||
) |
Create a chat widget that will connect to the given server.
Definition at line 26 of file SimpleChatWidget.C.
: WContainerWidget(parent), server_(server), app_(WApplication::instance()), messageReceived_("sounds/message_received.mp3") { user_ = server_.suggestGuest(); letLogin(); }
SimpleChatWidget::~SimpleChatWidget | ( | ) |
virtual void SimpleChatWidget::createLayout | ( | WWidget * | messages, |
WWidget * | userList, | ||
WWidget * | messageEdit, | ||
WWidget * | sendButton, | ||
WWidget * | logoutButton | ||
) | [protected, virtual] |
void SimpleChatWidget::letLogin | ( | ) |
Show a simple login screen.
Definition at line 42 of file SimpleChatWidget.C.
{ clear(); WVBoxLayout *vLayout = new WVBoxLayout(); setLayout(vLayout, AlignLeft | AlignTop); WHBoxLayout *hLayout = new WHBoxLayout(); vLayout->addLayout(hLayout); hLayout->addWidget(new WLabel("User name:"), 0, AlignMiddle); hLayout->addWidget(userNameEdit_ = new WLineEdit(user_), 0, AlignMiddle); userNameEdit_->setFocus(); WPushButton *b = new WPushButton("Login"); hLayout->addWidget(b, 0, AlignMiddle); hLayout->addStretch(1); b->clicked().connect(this, &SimpleChatWidget::login); userNameEdit_->enterPressed().connect(this, &SimpleChatWidget::login); vLayout->addWidget(statusMsg_ = new WText()); statusMsg_->setTextFormat(PlainText); }
void SimpleChatWidget::login | ( | ) | [private] |
Definition at line 67 of file SimpleChatWidget.C.
{ WString name = WWebWidget::escapeText(userNameEdit_->text()); if (!startChat(name)) statusMsg_->setText("Sorry, name '" + name + "' is already taken."); }
void SimpleChatWidget::logout | ( | ) |
Definition at line 75 of file SimpleChatWidget.C.
{ if (eventConnection_.connected()) { eventConnection_.disconnect(); // do not listen for more events server_.logout(user_); app_->enableUpdates(false); letLogin(); } }
void SimpleChatWidget::processChatEvent | ( | const ChatEvent & | event ) | [private] |
Definition at line 277 of file SimpleChatWidget.C.
{ /* * This is where the "server-push" happens. This method is called * when a new event or message needs to be notified to the user. In * general, it is called from another session. */ /* * First, take the lock to safely manipulate the UI outside of the * normal event loop, by having exclusive access to the session. */ WApplication::UpdateLock lock(app_); if (lock) { /* * Format and append the line to the conversation. * * This is also the step where the automatic XSS filtering will kick in: * - if another user tried to pass on some JavaScript, it is filtered away. * - if another user did not provide valid XHTML, the text is automatically * interpreted as PlainText */ bool needPush = false; /* * If it is not a normal message, also update the user list. */ if (event.type() != ChatEvent::Message) { if (event.type() == ChatEvent::Rename && event.user() == user_) user_ = event.data(); needPush = true; updateUsers(); } bool display = event.type() != ChatEvent::Message || !userList_ || (users_.find(event.user()) != users_.end() && users_[event.user()]); if (display) { needPush = true; WText *w = new WText(event.formattedHTML(user_), messages_); w->setInline(false); w->setStyleClass("chat-msg"); /* * Leave not more than 100 messages in the back-log */ if (messages_->count() > 100) delete messages_->children()[0]; /* * Little javascript trick to make sure we scroll along with new content */ app_->doJavaScript(messages_->jsRef() + ".scrollTop += " + messages_->jsRef() + ".scrollHeight;"); /* If this message belongs to another user, play a received sound */ if (event.user() != user_) messageReceived_.play(); } if (needPush) app_->triggerUpdate(); } }
void SimpleChatWidget::send | ( | ) | [private] |
Definition at line 235 of file SimpleChatWidget.C.
{ if (!messageEdit_->text().empty()) server_.sendMessage(user_, messageEdit_->text()); }
SimpleChatServer& SimpleChatWidget::server | ( | ) | [inline] |
Definition at line 56 of file SimpleChatWidget.h.
{ return server_; }
bool SimpleChatWidget::startChat | ( | const Wt::WString & | user ) |
Start a chat for the given user.
Returns false if the user could not login.
Definition at line 149 of file SimpleChatWidget.C.
{ if (server_.login(user)) { // this widget supports server-side updates its processChatEvent() // method is connected to a slot that is triggered from outside this // session's event loop (usually because another user enters text). app_->enableUpdates(true); // FIXME, chatEvent() needs to be protected by the server mutex too eventConnection_ = server_.chatEvent().connect(this, &SimpleChatWidget::processChatEvent); user_ = user; clear(); messages_ = new WContainerWidget(); userList_ = new WContainerWidget(); messageEdit_ = new WTextArea(); messageEdit_->setRows(2); messageEdit_->setFocus(); // Display scroll bars if contents overflows messages_->setOverflow(WContainerWidget::OverflowAuto); userList_->setOverflow(WContainerWidget::OverflowAuto); sendButton_ = new WPushButton("Send"); WPushButton *logoutButton = new WPushButton("Logout"); createLayout(messages_, userList_, messageEdit_, sendButton_, logoutButton); /* * Connect event handlers: * - click on button * - enter in text area * * We will clear the input field using a small custom client-side * JavaScript invocation. */ // Create a JavaScript 'slot' (JSlot). The JavaScript slot always takes // 2 arguments: the originator of the event (in our case the // button or text area), and the JavaScript event object. clearInput_.setJavaScript ("function(o, e) { setTimeout(function() {" "" + messageEdit_->jsRef() + ".value='';" "}, 0); }"); // Bind the C++ and JavaScript event handlers. sendButton_->clicked().connect(this, &SimpleChatWidget::send); messageEdit_->enterPressed().connect(this, &SimpleChatWidget::send); sendButton_->clicked().connect(clearInput_); messageEdit_->enterPressed().connect(clearInput_); sendButton_->clicked().connect(messageEdit_, &WLineEdit::setFocus); messageEdit_->enterPressed().connect(messageEdit_, &WLineEdit::setFocus); // Prevent the enter from generating a new line, which is its default // action messageEdit_->enterPressed().preventDefaultAction(); logoutButton->clicked().connect(this, &SimpleChatWidget::logout); WText *msg = new WText ("<div><span class='chat-info'>You are joining as " + user_ + ".</span></div>", messages_); msg->setStyleClass("chat-msg"); if (!userList_->parent()) { delete userList_; userList_ = 0; } if (!sendButton_->parent()) { delete sendButton_; sendButton_ = 0; } if (!logoutButton->parent()) delete logoutButton; updateUsers(); return true; } else return false; }
void SimpleChatWidget::updateUser | ( | ) | [private] |
void SimpleChatWidget::updateUsers | ( | ) | [protected, virtual] |
Reimplemented in PopupChatWidget.
Definition at line 241 of file SimpleChatWidget.C.
{ if (userList_) { userList_->clear(); SimpleChatServer::UserSet users = server_.users(); UserMap oldUsers = users_; users_.clear(); for (SimpleChatServer::UserSet::iterator i = users.begin(); i != users.end(); ++i) { WCheckBox *w = new WCheckBox(*i, userList_); w->setInline(false); UserMap::const_iterator j = oldUsers.find(*i); if (j != oldUsers.end()) w->setChecked(j->second); else w->setChecked(true); users_[*i] = w->isChecked(); w->changed().connect(this, &SimpleChatWidget::updateUser); if (*i == user_) w->setStyleClass("chat-self"); } } }
int SimpleChatWidget::userCount | ( | ) | [inline] |
Definition at line 58 of file SimpleChatWidget.h.
{ return users_.size(); }
Wt::WApplication* SimpleChatWidget::app_ [private] |
Definition at line 72 of file SimpleChatWidget.h.
Wt::JSlot SimpleChatWidget::clearInput_ [private] |
Definition at line 74 of file SimpleChatWidget.h.
boost::signals::connection SimpleChatWidget::eventConnection_ [private] |
Definition at line 87 of file SimpleChatWidget.h.
Wt::WTextArea* SimpleChatWidget::messageEdit_ [private] |
Definition at line 83 of file SimpleChatWidget.h.
Definition at line 82 of file SimpleChatWidget.h.
Wt::WSound SimpleChatWidget::messageReceived_ [private] |
Definition at line 89 of file SimpleChatWidget.h.
Wt::WContainerWidget* SimpleChatWidget::messages_ [private] |
Definition at line 81 of file SimpleChatWidget.h.
Wt::WPushButton* SimpleChatWidget::sendButton_ [private] |
Definition at line 84 of file SimpleChatWidget.h.
SimpleChatServer& SimpleChatWidget::server_ [private] |
Definition at line 71 of file SimpleChatWidget.h.
Wt::WText* SimpleChatWidget::statusMsg_ [private] |
Definition at line 79 of file SimpleChatWidget.h.
Wt::WString SimpleChatWidget::user_ [private] |
Definition at line 76 of file SimpleChatWidget.h.
Wt::WContainerWidget* SimpleChatWidget::userList_ [private] |
Definition at line 85 of file SimpleChatWidget.h.
Wt::WLineEdit* SimpleChatWidget::userNameEdit_ [private] |
Definition at line 78 of file SimpleChatWidget.h.
UserMap SimpleChatWidget::users_ [private] |
Definition at line 69 of file SimpleChatWidget.h.