Init example.
diff --git a/mainwindow.ui b/mainwindow.ui
new file mode 100644
index 0000000..fd16012
--- /dev/null
+++ b/mainwindow.ui
@@ -0,0 +1,118 @@
+<?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>326</width>
+ <height>207</height>
+ </rect>
+ </property>
+ <property name="windowTitle">
+ <string>MainWindow</string>
+ </property>
+ <widget class="QWidget" name="centralWidget">
+ <layout class="QVBoxLayout" name="verticalLayout">
+ <item>
+ <spacer name="verticalSpacer_3">
+ <property name="orientation">
+ <enum>Qt::Vertical</enum>
+ </property>
+ <property name="sizeHint" stdset="0">
+ <size>
+ <width>17</width>
+ <height>0</height>
+ </size>
+ </property>
+ </spacer>
+ </item>
+ <item>
+ <widget class="QLineEdit" name="call_number">
+ <property name="text">
+ <string>192.168.49.103</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="pushButton">
+ <property name="text">
+ <string>Call</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <spacer name="verticalSpacer">
+ <property name="orientation">
+ <enum>Qt::Vertical</enum>
+ </property>
+ <property name="sizeHint" stdset="0">
+ <size>
+ <width>17</width>
+ <height>1</height>
+ </size>
+ </property>
+ </spacer>
+ </item>
+ <item>
+ <widget class="QPushButton" name="pushButton_3">
+ <property name="text">
+ <string>Answer</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <widget class="QPushButton" name="pushButton_2">
+ <property name="text">
+ <string>Hang up</string>
+ </property>
+ </widget>
+ </item>
+ <item>
+ <spacer name="verticalSpacer_2">
+ <property name="orientation">
+ <enum>Qt::Vertical</enum>
+ </property>
+ <property name="sizeHint" stdset="0">
+ <size>
+ <width>17</width>
+ <height>0</height>
+ </size>
+ </property>
+ </spacer>
+ </item>
+ </layout>
+ </widget>
+ <widget class="QMenuBar" name="menuBar">
+ <property name="geometry">
+ <rect>
+ <x>0</x>
+ <y>0</y>
+ <width>326</width>
+ <height>22</height>
+ </rect>
+ </property>
+ </widget>
+ </widget>
+ <layoutdefault spacing="6" margin="11"/>
+ <resources/>
+ <connections>
+ <connection>
+ <sender>call_number</sender>
+ <signal>returnPressed()</signal>
+ <receiver>pushButton</receiver>
+ <slot>animateClick()</slot>
+ <hints>
+ <hint type="sourcelabel">
+ <x>160</x>
+ <y>70</y>
+ </hint>
+ <hint type="destinationlabel">
+ <x>116</x>
+ <y>98</y>
+ </hint>
+ </hints>
+ </connection>
+ </connections>
+</ui>