qmlchatclient.qml Example File

chatclient-qml/qmlchatclient.qml
/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Copyright (C) 2016 basysKom GmbH, author Bernd Lamecker <bernd.lamecker@basyskom.com> ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtWebChannel module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
import QtQuick 2.2 import QtQuick.Dialogs 1.2 import QtQuick.Controls 2.0 import QtQuick.Window 2.0 import QtQuick.Layouts 1.1 import Qt.WebSockets 1.0 import "qwebchannel.js" as WebChannel ApplicationWindow { id: root property var channel property string loginName: loginUi.userName.text title: "Chat client" width: 640 height: 480 visible: true WebSocket { id: socket // the following three properties/functions are required to align the QML WebSocket API // with the HTML5 WebSocket API. property var send: function(arg) { sendTextMessage(arg); } onTextMessageReceived: { onmessage({data: message}); } property var onmessage active: true url: "ws://localhost:12345" onStatusChanged: { switch (socket.status) { case WebSocket.Error: errorDialog.text = "Error: " + socket.errorString; errorDialog.visible = true; break; case WebSocket.Closed: errorDialog.text = "Error: Socket at " + url + " closed."; errorDialog.visible = true; break; case WebSocket.Open: //open the webchannel with the socket as transport new WebChannel.QWebChannel(socket, function(ch) { root.channel = ch; //connect to the changed signal of the userList property ch.objects.chatserver.userListChanged.connect(function(args) { mainUi.userlist.text = ''; ch.objects.chatserver.userList.forEach(function(user) { mainUi.userlist.text += user + '\n'; }); }); //connect to the newMessage signal ch.objects.chatserver.newMessage.connect(function(time, user, message) { var line = "[" + time + "] " + user + ": " + message + '\n'; mainUi.chat.text = mainUi.chat.text + line; }); //connect to the keep alive signal ch.objects.chatserver.keepAlive.connect(function(args) { if (loginName !== '') //and call the keep alive response method as an answer ch.objects.chatserver.keepAliveResponse(loginName); }); }); loginWindow.show(); break; } } } MainForm { id: mainUi anchors.fill: parent Connections { target: mainUi.message onEditingFinished: { if (mainUi.message.text.length) { //call the sendMessage method to send the message root.channel.objects.chatserver.sendMessage(loginName, mainUi.message.text); } mainUi.message.text = ''; } } } Window { id: loginWindow title: "Login" modality: Qt.ApplicationModal width: 300 height: 200 LoginForm { id: loginUi anchors.fill: parent nameInUseError.visible: false Connections { target: loginUi.loginButton onClicked: { //call the login method root.channel.objects.chatserver.login(loginName, function(arg) { //check the return value for success if (arg === true) { loginUi.nameInUseError.visible = false; loginWindow.close(); } else { loginUi.nameInUseError.visible = true; } }); } } } } MessageDialog { id: errorDialog icon: StandardIcon.Critical standardButtons: StandardButton.Close title: "Chat client" onAccepted: { Qt.quit(); } onRejected: { Qt.quit(); } } }