Simple MQTT Client Example

 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>MainWindow</class>
  <widget class="QMainWindow" name="MainWindow">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>1024</width>
     <height>768</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>MainWindow</string>
   </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QVBoxLayout" name="verticalLayout">
     <item>
      <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
        <layout class="QFormLayout" name="formLayout">
         <item row="0" column="0">
          <widget class="QLabel" name="label">
           <property name="text">
            <string>Host:</string>
           </property>
          </widget>
         </item>
         <item row="0" column="1">
          <widget class="QLineEdit" name="lineEditHost">
           <property name="text">
            <string/>
           </property>
          </widget>
         </item>
         <item row="2" column="0">
          <widget class="QLabel" name="label_2">
           <property name="text">
            <string>Port:</string>
           </property>
          </widget>
         </item>
         <item row="2" column="1">
          <widget class="QSpinBox" name="spinBoxPort">
           <property name="maximum">
            <number>99999</number>
           </property>
           <property name="value">
            <number>1883</number>
           </property>
          </widget>
         </item>
        </layout>
       </item>
       <item>
        <widget class="QPushButton" name="buttonConnect">
         <property name="text">
          <string>Connect</string>
         </property>
        </widget>
       </item>
      </layout>
     </item>
     <item>
      <layout class="QGridLayout" name="gridLayout">
       <item row="1" column="1">
        <widget class="QLineEdit" name="lineEditMessage">
         <property name="text">
          <string>This is a test message</string>
         </property>
        </widget>
       </item>
       <item row="1" column="0">
        <widget class="QLabel" name="label_4">
         <property name="text">
          <string>Message:</string>
         </property>
        </widget>
       </item>
       <item row="0" column="2">
        <widget class="QPushButton" name="buttonSubscribe">
         <property name="text">
          <string>Subscribe</string>
         </property>
        </widget>
       </item>
       <item row="1" column="2">
        <widget class="QPushButton" name="buttonPublish">
         <property name="text">
          <string>Publish</string>
         </property>
        </widget>
       </item>
       <item row="0" column="1">
        <widget class="QLineEdit" name="lineEditTopic">
         <property name="text">
          <string>qtmqtt/topic1</string>
         </property>
        </widget>
       </item>
       <item row="0" column="0">
        <widget class="QLabel" name="label_3">
         <property name="text">
          <string>Topic:</string>
         </property>
        </widget>
       </item>
      </layout>
     </item>
     <item>
      <widget class="QGroupBox" name="groupBox">
       <property name="title">
        <string>Log Messages</string>
       </property>
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <item>
         <widget class="QPlainTextEdit" name="editLog"/>
        </item>
       </layout>
      </widget>
     </item>
     <item>
      <layout class="QHBoxLayout" name="horizontalLayout_3">
       <item>
        <spacer name="horizontalSpacer">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>40</width>
           <height>20</height>
          </size>
         </property>
        </spacer>
       </item>
       <item>
        <widget class="QPushButton" name="buttonQuit">
         <property name="text">
          <string>Quit</string>
         </property>
        </widget>
       </item>
      </layout>
     </item>
    </layout>
   </widget>
   <widget class="QMenuBar" name="menuBar">
    <property name="geometry">
     <rect>
      <x>0</x>
      <y>0</y>
      <width>1024</width>
      <height>20</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
     <property name="title">
      <string>File</string>
     </property>
     <addaction name="actionQuit"/>
    </widget>
    <addaction name="menuFile"/>
   </widget>
   <widget class="QToolBar" name="mainToolBar">
    <attribute name="toolBarArea">
     <enum>TopToolBarArea</enum>
    </attribute>
    <attribute name="toolBarBreak">
     <bool>false</bool>
    </attribute>
   </widget>
   <widget class="QStatusBar" name="statusBar"/>
   <action name="actionQuit">
    <property name="text">
     <string>Quit</string>
    </property>
   </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources/>
  <connections/>
 </ui>