Custom qrcode renderer to allow smooth resizing

src/mainwindow.ui

@@ -22,7 +22,7 @@
     <item row="0" column="0">
      <widget class="QTabWidget" name="tabWidget">
       <property name="currentIndex">
-       <number>3</number>
+       <number>2</number>
       </property>
       <widget class="QWidget" name="tab">
        <attribute name="title">
@@ -316,8 +316,8 @@
                <rect>
                 <x>0</x>
                 <y>0</y>
-                <width>849</width>
-                <height>369</height>
+                <width>841</width>
+                <height>321</height>
                </rect>
               </property>
               <layout class="QVBoxLayout" name="sendToLayout">
@@ -670,7 +670,7 @@
              </widget>
             </item>
             <item>
-             <widget class="QLabel" name="qrcodeDisplay">
+             <widget class="QRCodeLabel" name="qrcodeDisplay">
               <property name="sizePolicy">
                <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
                 <horstretch>0</horstretch>
@@ -718,7 +718,7 @@
      <x>0</x>
      <y>0</y>
      <width>889</width>
-     <height>19</height>
+     <height>22</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -783,6 +783,13 @@
   </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>QRCodeLabel</class>
+   <extends>QLabel</extends>
+   <header>qrcodelabel.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>tabWidget</tabstop>
   <tabstop>inputsCombo</tabstop>