MainWindow.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QWidget" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="styleSheet">
   <string notr="true">#minimizeButton {
  image: url(:/res/minimize-button1.png);
}

#minimizeButton, #maximizeButton {
  background-color: transparent;
  border-radius: 0px;
}

#minimizeButton:hover, #maximizeButton:hover {
  border-style: none;
  background-color: #80c7c7c7;
}

#minimizeButton:pressed, #maximizeButton:pressed {
  border-style: none;
  background-color: #80808080;
}

#closeButton {
  image: url(:/res/close-button1.png);
  background-color: transparent;
  border-radius: 0px;
}

#closeButton:hover {
  image: url(:/res/close-button2.png);
  border-style: none;
  background-color: #e81123;
}

#closeButton:pressed {
  image: url(:/res/close-button2.png);
  border-style: none;
  background-color: #8c0a15;
}

#label {
  color: &quot;#fefefe&quot;;
}</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <property name="leftMargin">
    <number>0</number>
   </property>
   <property name="topMargin">
    <number>0</number>
   </property>
   <property name="rightMargin">
    <number>0</number>
   </property>
   <property name="bottomMargin">
    <number>0</number>
   </property>
   <property name="spacing">
    <number>0</number>
   </property>
   <item row="0" column="0">
    <spacer name="horizontalSpacer">
     <property name="orientation">
      <enum>Qt::Horizontal</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>262</width>
       <height>20</height>
      </size>
     </property>
    </spacer>
   </item>
   <item row="0" column="3">
    <widget class="QPushButton" name="closeButton">
     <property name="sizePolicy">
      <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
       <horstretch>0</horstretch>
       <verstretch>0</verstretch>
      </sizepolicy>
     </property>
     <property name="minimumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="maximumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="focusPolicy">
      <enum>Qt::NoFocus</enum>
     </property>
     <property name="contextMenuPolicy">
      <enum>Qt::NoContextMenu</enum>
     </property>
     <property name="toolTip">
      <string>Close</string>
     </property>
     <property name="iconSize">
      <size>
       <width>34</width>
       <height>26</height>
      </size>
     </property>
    </widget>
   </item>
   <item row="0" column="2">
    <widget class="QPushButton" name="maximizeButton">
     <property name="sizePolicy">
      <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
       <horstretch>0</horstretch>
       <verstretch>0</verstretch>
      </sizepolicy>
     </property>
     <property name="minimumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="maximumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="focusPolicy">
      <enum>Qt::NoFocus</enum>
     </property>
     <property name="contextMenuPolicy">
      <enum>Qt::NoContextMenu</enum>
     </property>
     <property name="toolTip">
      <string>Maximize</string>
     </property>
     <property name="iconSize">
      <size>
       <width>34</width>
       <height>26</height>
      </size>
     </property>
    </widget>
   </item>
   <item row="0" column="1">
    <widget class="QPushButton" name="minimizeButton">
     <property name="sizePolicy">
      <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
       <horstretch>0</horstretch>
       <verstretch>0</verstretch>
      </sizepolicy>
     </property>
     <property name="minimumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="maximumSize">
      <size>
       <width>45</width>
       <height>26</height>
      </size>
     </property>
     <property name="focusPolicy">
      <enum>Qt::NoFocus</enum>
     </property>
     <property name="contextMenuPolicy">
      <enum>Qt::NoContextMenu</enum>
     </property>
     <property name="toolTip">
      <string>Minimize</string>
     </property>
     <property name="iconSize">
      <size>
       <width>34</width>
       <height>26</height>
      </size>
     </property>
    </widget>
   </item>
   <item row="1" column="0" colspan="4">
    <widget class="QLabel" name="label">
     <property name="font">
      <font>
       <family>Arial</family>
       <pointsize>28</pointsize>
      </font>
     </property>
     <property name="text">
      <string>Qt Widgets Inside</string>
     </property>
     <property name="alignment">
      <set>Qt::AlignCenter</set>
     </property>
    </widget>
   </item>
  </layout>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources/>
 <connections>
  <connection>
   <sender>closeButton</sender>
   <signal>clicked()</signal>
   <receiver>MainWindow</receiver>
   <slot>close()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>378</x>
     <y>9</y>
    </hint>
    <hint type="destinationlabel">
     <x>432</x>
     <y>47</y>
    </hint>
   </hints>
  </connection>
  <connection>
   <sender>minimizeButton</sender>
   <signal>clicked()</signal>
   <receiver>MainWindow</receiver>
   <slot>showMinimized()</slot>
   <hints>
    <hint type="sourcelabel">
     <x>318</x>
     <y>7</y>
    </hint>
    <hint type="destinationlabel">
     <x>418</x>
     <y>73</y>
    </hint>
   </hints>
  </connection>
 </connections>
</ui>