QT第四天

要求：使用QT完成计算器UI设计，如下图：

程序运行结果：

?

代码：

?mainwindow.ui

<?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>540</width>
    <height>960</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>计算器</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout_3" stretch="2,1,1,1,1,2">
    <item>
     <widget class="QLabel" name="label">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="layoutDirection">
       <enum>Qt::LeftToRight</enum>
      </property>
      <property name="text">
       <string>=</string>
      </property>
     </widget>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="pushButton_4">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>MC</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_3">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>MR</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_2">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>MS</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_5">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>M+</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>M-</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <item>
       <widget class="QPushButton" name="pushButton_6">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>←</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_7">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>CE</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_8">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>C</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_9">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>±</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_10">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>√</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_3">
      <item>
       <widget class="QPushButton" name="pushButton_11">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>7</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_12">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>8</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_13">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>9</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_14">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>/</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_15">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>%</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_4">
      <property name="topMargin">
       <number>0</number>
      </property>
      <item>
       <widget class="QPushButton" name="pushButton_16">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>4</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_17">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>5</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_18">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>6</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_19">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>*</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_20">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>1/x</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_5" stretch="2,2,1">
      <property name="spacing">
       <number>6</number>
      </property>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <property name="rightMargin">
         <number>0</number>
        </property>
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_13" stretch="0,0">
          <property name="rightMargin">
           <number>0</number>
          </property>
          <item>
           <widget class="QPushButton" name="pushButton_35">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>1</string>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QPushButton" name="pushButton_34">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>2</string>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <widget class="QPushButton" name="pushButton_36">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>0</string>
          </property>
         </widget>
        </item>
       </layout>
      </item>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
        <property name="rightMargin">
         <number>0</number>
        </property>
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_7" stretch="0,0">
          <property name="spacing">
           <number>6</number>
          </property>
          <property name="leftMargin">
           <number>0</number>
          </property>
          <property name="rightMargin">
           <number>0</number>
          </property>
          <item>
           <widget class="QPushButton" name="pushButton_23">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>3</string>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QPushButton" name="pushButton_22">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>－</string>
            </property>
           </widget>
          </item>
         </layout>
        </item>
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_12">
          <property name="spacing">
           <number>6</number>
          </property>
          <property name="leftMargin">
           <number>0</number>
          </property>
          <property name="rightMargin">
           <number>0</number>
          </property>
          <item>
           <widget class="QPushButton" name="pushButton_32">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>.</string>
            </property>
           </widget>
          </item>
          <item>
           <widget class="QPushButton" name="pushButton_33">
            <property name="sizePolicy">
             <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
              <horstretch>0</horstretch>
              <verstretch>0</verstretch>
             </sizepolicy>
            </property>
            <property name="text">
             <string>+</string>
            </property>
           </widget>
          </item>
         </layout>
        </item>
       </layout>
      </item>
      <item>
       <widget class="QPushButton" name="pushButton_21">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Expanding">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>＝</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>540</width>
     <height>28</height>
    </rect>
   </property>
   <widget class="QMenu" name="menuview">
    <property name="title">
     <string>查看(V)</string>
    </property>
   </widget>
   <widget class="QMenu" name="menuedit">
    <property name="title">
     <string>编辑(E)</string>
    </property>
   </widget>
   <widget class="QMenu" name="menuhelp">
    <property name="title">
     <string>帮助(H)</string>
    </property>
   </widget>
   <addaction name="menuview"/>
   <addaction name="menuedit"/>
   <addaction name="menuhelp"/>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>