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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include <QtWidgets> |
| |
| #include "chatdialog.h" |
| |
| ChatDialog::ChatDialog(QWidget *parent) |
| : QDialog(parent) |
| { |
| setupUi(this); |
| |
| lineEdit->setFocusPolicy(Qt::StrongFocus); |
| textEdit->setFocusPolicy(Qt::NoFocus); |
| textEdit->setReadOnly(true); |
| listWidget->setFocusPolicy(Qt::NoFocus); |
| |
| connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressed())); |
| connect(lineEdit, SIGNAL(returnPressed()), this, SLOT(returnPressed())); |
| connect(&client, SIGNAL(newMessage(QString,QString)), |
| this, SLOT(appendMessage(QString,QString))); |
| connect(&client, SIGNAL(newParticipant(QString)), |
| this, SLOT(newParticipant(QString))); |
| connect(&client, SIGNAL(participantLeft(QString)), |
| this, SLOT(participantLeft(QString))); |
| |
| myNickName = client.nickName(); |
| newParticipant(myNickName); |
| tableFormat.setBorder(0); |
| QTimer::singleShot(10 * 1000, this, SLOT(showInformation())); |
| } |
| |
| void ChatDialog::appendMessage(const QString &from, const QString &message) |
| { |
| if (from.isEmpty() || message.isEmpty()) |
| return; |
| |
| QTextCursor cursor(textEdit->textCursor()); |
| cursor.movePosition(QTextCursor::End); |
| QTextTable *table = cursor.insertTable(1, 2, tableFormat); |
| table->cellAt(0, 0).firstCursorPosition().insertText('<' + from + "> "); |
| table->cellAt(0, 1).firstCursorPosition().insertText(message); |
| QScrollBar *bar = textEdit->verticalScrollBar(); |
| bar->setValue(bar->maximum()); |
| } |
| |
| void ChatDialog::returnPressed() |
| { |
| QString text = lineEdit->text(); |
| if (text.isEmpty()) |
| return; |
| |
| if (text.startsWith(QChar('/'))) { |
| QColor color = textEdit->textColor(); |
| textEdit->setTextColor(Qt::red); |
| textEdit->append(tr("! Unknown command: %1") |
| .arg(text.left(text.indexOf(' ')))); |
| textEdit->setTextColor(color); |
| } else { |
| client.sendMessage(text); |
| appendMessage(myNickName, text); |
| } |
| |
| lineEdit->clear(); |
| } |
| |
| void ChatDialog::newParticipant(const QString &nick) |
| { |
| if (nick.isEmpty()) |
| return; |
| |
| QColor color = textEdit->textColor(); |
| textEdit->setTextColor(Qt::gray); |
| textEdit->append(tr("* %1 has joined").arg(nick)); |
| textEdit->setTextColor(color); |
| listWidget->addItem(nick); |
| } |
| |
| void ChatDialog::participantLeft(const QString &nick) |
| { |
| if (nick.isEmpty()) |
| return; |
| |
| QList<QListWidgetItem *> items = listWidget->findItems(nick, |
| Qt::MatchExactly); |
| if (items.isEmpty()) |
| return; |
| |
| delete items.at(0); |
| QColor color = textEdit->textColor(); |
| textEdit->setTextColor(Qt::gray); |
| textEdit->append(tr("* %1 has left").arg(nick)); |
| textEdit->setTextColor(color); |
| } |
| |
| void ChatDialog::showInformation() |
| { |
| if (listWidget->count() == 1) { |
| QMessageBox::information(this, tr("Chat"), |
| tr("Launch several instances of this " |
| "program on your local network and " |
| "start chatting!")); |
| } |
| } |