window.ui Example File
painting/svggenerator/forms/window.ui

 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>Window</class>
  <widget class="QWidget" name="Window">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>339</width>
     <height>353</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>SVG Generator</string>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
    <property name="sizeConstraint">
     <enum>QLayout::SetFixedSize</enum>
    </property>
    <item row="0" column="0">
     <spacer name="horizontalSpacer_2">
      <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 row="0" column="1">
     <widget class="DisplayWidget" name="displayWidget" native="true">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
        <horstretch>200</horstretch>
        <verstretch>200</verstretch>
       </sizepolicy>
      </property>
      <property name="minimumSize">
       <size>
        <width>200</width>
        <height>200</height>
       </size>
      </property>
      <property name="maximumSize">
       <size>
        <width>200</width>
        <height>200</height>
       </size>
      </property>
     </widget>
    </item>
    <item row="0" column="2">
     <spacer name="horizontalSpacer_3">
      <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 row="1" column="0" colspan="3">
     <layout class="QGridLayout" name="gridLayout">
      <item row="0" column="0">
       <widget class="QLabel" name="label">
        <property name="text">
         <string>&amp;Shape:</string>
        </property>
        <property name="buddy">
         <cstring>shapeComboBox</cstring>
        </property>
       </widget>
      </item>
      <item row="0" column="1">
       <widget class="QComboBox" name="shapeComboBox">
        <item>
         <property name="text">
          <string>House</string>
         </property>
        </item>
        <item>
         <property name="text">
          <string>Car</string>
         </property>
        </item>
       </widget>
      </item>
      <item row="1" column="0">
       <widget class="QLabel" name="label_2">
        <property name="text">
         <string>&amp;Color:</string>
        </property>
        <property name="buddy">
         <cstring>colorButton</cstring>
        </property>
       </widget>
      </item>
      <item row="1" column="1">
       <widget class="QToolButton" name="colorButton">
        <property name="text">
         <string>Choose Color...</string>
        </property>
       </widget>
      </item>
      <item row="2" column="0">
       <widget class="QLabel" name="label_3">
        <property name="text">
         <string>&amp;Background:</string>
        </property>
        <property name="buddy">
         <cstring>shapeComboBox_2</cstring>
        </property>
       </widget>
      </item>
      <item row="2" column="1">
       <widget class="QComboBox" name="shapeComboBox_2">
        <item>
         <property name="text">
          <string>Sky</string>
         </property>
        </item>
        <item>
         <property name="text">
          <string>Trees</string>
         </property>
        </item>
        <item>
         <property name="text">
          <string>Road</string>
         </property>
        </item>
       </widget>
      </item>
     </layout>
    </item>
    <item row="2" column="0" colspan="3">
     <layout class="QHBoxLayout" name="horizontalLayout">
      <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="QToolButton" name="toolButton_2">
        <property name="text">
         <string>Save &amp;As...</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
    <class>DisplayWidget</class>
    <extends>QWidget</extends>
    <header>displaywidget.h</header>
    <container>1</container>
   </customwidget>
  </customwidgets>
  <resources/>
  <connections>
   <connection>
    <sender>shapeComboBox</sender>
    <signal>currentIndexChanged(int)</signal>
    <receiver>Window</receiver>
    <slot>updateShape(int)</slot>
    <hints>
     <hint type="sourcelabel">
      <x>288</x>
      <y>232</y>
     </hint>
     <hint type="destinationlabel">
      <x>336</x>
      <y>234</y>
     </hint>
    </hints>
   </connection>
   <connection>
    <sender>colorButton</sender>
    <signal>clicked()</signal>
    <receiver>Window</receiver>
    <slot>updateColor()</slot>
    <hints>
     <hint type="sourcelabel">
      <x>301</x>
      <y>262</y>
     </hint>
     <hint type="destinationlabel">
      <x>337</x>
      <y>267</y>
     </hint>
    </hints>
   </connection>
   <connection>
    <sender>shapeComboBox_2</sender>
    <signal>currentIndexChanged(int)</signal>
    <receiver>Window</receiver>
    <slot>updateBackground(int)</slot>
    <hints>
     <hint type="sourcelabel">
      <x>306</x>
      <y>299</y>
     </hint>
     <hint type="destinationlabel">
      <x>337</x>
      <y>311</y>
     </hint>
    </hints>
   </connection>
   <connection>
    <sender>toolButton_2</sender>
    <signal>clicked()</signal>
    <receiver>Window</receiver>
    <slot>saveSvg()</slot>
    <hints>
     <hint type="sourcelabel">
      <x>298</x>
      <y>336</y>
     </hint>
     <hint type="destinationlabel">
      <x>307</x>
      <y>348</y>
     </hint>
    </hints>
   </connection>
  </connections>
  <slots>
   <slot>updateBackground(int)</slot>
   <slot>updateColor()</slot>
   <slot>updateShape(int)</slot>
   <slot>saveSvg()</slot>
  </slots>
 </ui>