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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples 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 2.8
import QtQuick.Window 2.2
import QtQuick.Controls 2.1
import QtQuick.Layouts 1.1
import MqttClient 1.0
Window {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
id: root
property var tempSubscription: 0
MqttClient {
id: client
hostname: hostnameField.text
port: portField.text
}
ListModel {
id: messageModel
}
function addMessage(payload)
{
messageModel.insert(0, {"payload" : payload})
if (messageModel.count >= 100)
messageModel.remove(99)
}
GridLayout {
anchors.fill: parent
columns: 2
Label {
text: "Hostname:"
enabled: client.state === MqttClient.Disconnected
}
TextField {
id: hostnameField
Layout.fillWidth: true
// text: "broker.hivemq.com"
text: "test.mosquitto.org"
placeholderText: "<Enter host running MQTT broker>"
enabled: client.state === MqttClient.Disconnected
}
Label {
text: "Port:"
enabled: client.state === MqttClient.Disconnected
}
TextField {
id: portField
Layout.fillWidth: true
text: "1883"
placeholderText: "<Port>"
inputMethodHints: Qt.ImhDigitsOnly
enabled: client.state === MqttClient.Disconnected
}
Button {
id: connectButton
Layout.columnSpan: 2
text: client.state === MqttClient.Connected ? "Disconnect" : "Connect"
onClicked: {
if (client.state === MqttClient.Connected)
client.disconnectFromHost()
else
client.connectToHost()
}
}
RowLayout {
enabled: client.state === MqttClient.Connected
Layout.columnSpan: 2
Layout.fillWidth: true
Label {
text: "Topic:"
}
TextField {
id: subField
placeholderText: "<Subscription topic>"
}
Button {
id: subButton
text: "Subscribe"
onClicked: {
if (subField.text.length === 0)
return
tempSubscription = client.subscribe(subField.text)
tempSubscription.messageReceived.connect(addMessage)
}
}
}
ListView {
id: messageView
model: messageModel
height: 300
width: 200
Layout.fillHeight: true
delegate: Rectangle {
width: 150
height: 30
color: index % 2 ? "#DDDDDD" : "#888888"
radius: 5
Text {
text: payload
anchors.centerIn: parent
}
}
}
Label {
function stateToString(value) {
if (value === 0)
return "Disconnected"
else if (value === 1)
return "Connecting"
else if (value === 2)
return "Connected"
else
return "Unknown"
}
Layout.columnSpan: 2
Layout.fillWidth: true
color: "#333333"
text: "Status:" + stateToString(client.state) + "(" + client.state + ")"
enabled: client.state === MqttClient.Connected
}
}
}
|
