如何在mainWindow

时间：2019-07-08 18:56:27

标签： python python-3.x pyqt pyqt5 qt-designer

我想在MainWindow选项卡中显示一个Form。已经创建了mainWindow并填充了空白标签，还创建了Form并填充了空白comboBox，标签等。

mainWindow称为home，并且称为form listInvoice。它们自己可以很好地工作，但是当我从主页选项卡调用listInvoice时，它将打开一个显示listInvoice GUI的新窗口，而不是在选项卡中显示listInvoice。

您知道如何从mainWindow选项卡中调用表单吗？谢谢您的帮助。

home.ui文件（由QT Designer创建）：

<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>500</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <widget class="QLabel" name="lDate">
      <property name="text">
       <string>TextLabel</string>
      </property>
     </widget>
    </item>
    <item row="1" column="0">
     <widget class="QTabWidget" name="tabWidget">
      <property name="tabPosition">
       <enum>QTabWidget::West</enum>
      </property>
      <property name="currentIndex">
       <number>0</number>
      </property>
      <property name="elideMode">
       <enum>Qt::ElideNone</enum>
      </property>
      <widget class="QWidget" name="tabHome">
       <attribute name="title">
        <string>Home</string>
       </attribute>
       <layout class="QGridLayout" name="gridLayout_2"/>
      </widget>
      <widget class="QWidget" name="tabCompanies">
       <attribute name="title">
        <string>Companies</string>
       </attribute>
      </widget>
      <widget class="QWidget" name="tabProjects">
       <attribute name="title">
        <string>Projects</string>
       </attribute>
      </widget>
      <widget class="QWidget" name="tabInvoices">
       <attribute name="title">
        <string>Invoices</string>
       </attribute>
      </widget>
     </widget>
    </item>
   </layout>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <resources/>
 <connections/>
</ui>

Home类：

# Class import
from listInvoice import ListInvoice

# GUI manager 
from PyQt5.QtWidgets import QApplication, QComboBox, QDialog, QDialogButtonBox, QFrame, QLabel, QLineEdit, QMainWindow, QMessageBox, QPushButton, QTabWidget, QVBoxLayout,QWidget
from PyQt5.uic import loadUi

# Other imports
import datetime
import sys


class Home(QMainWindow):
    print("home.py")
    def __init__(self):
        super(Home, self).__init__()
        loadUi("home.ui", self)
        self.setWindowTitle("Home")

        # Display current date
        self.lDate.setText(str(datetime.date.today()))

        # Insert widget into tabs
        self.tabInvoices = ListInvoice()


app = QApplication(sys.argv)
widget = Home()
widget.show()
sys.exit(app.exec_())

listInvoice.ui（由QT Designer创建）：

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>735</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="1" column="0">
    <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 row="1" column="2">
    <widget class="QPushButton" name="pbSearch">
     <property name="text">
      <string>Search</string>
     </property>
    </widget>
   </item>
   <item row="4" column="0" colspan="3">
    <spacer name="verticalSpacer">
     <property name="orientation">
      <enum>Qt::Vertical</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>20</width>
       <height>40</height>
      </size>
     </property>
    </spacer>
   </item>
   <item row="0" column="2">
    <widget class="QPushButton" name="pbAddInvoice">
     <property name="text">
      <string>Add invoice</string>
     </property>
    </widget>
   </item>
   <item row="2" column="0">
    <widget class="QLabel" name="label">
     <property name="text">
      <string>Filter by:</string>
     </property>
    </widget>
   </item>
   <item row="1" column="1">
    <widget class="QLineEdit" name="leSearch"/>
   </item>
   <item row="2" column="1" colspan="2">
    <widget class="QPushButton" name="pbCertified">
     <property name="text">
      <string>To certified</string>
     </property>
     <property name="checkable">
      <bool>true</bool>
     </property>
    </widget>
   </item>
   <item row="3" column="0" colspan="3">
    <widget class="QTableWidget" name="twInvoices"/>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

和ListInvoice类：

class ListInvoice(QDialog):
    print("listInvoice.py")
    def __init__(self):
        super(ListInvoice, self).__init__()
        loadUi("listInvoice.ui", self)
        self.setWindowTitle("Invoices")

预期输出应该是主页选项卡中的listInvoice。

1 个答案:

答案 0 :(得分：2)

您错误地认为通过执行sef.tabInvoices = ListInvoice()来替换小部件，然后，否，变量self.tabInvoices指向对象，而当您重新分配它时，该变量将不再指向初始对象，而是到另一个。

考虑到以上情况，至少有两种解决方案：

1。使用布局：

使用布局将ListInvoice小部件放置在tabInvoices内部，而不是被替换而是放置在内部。

class Home(QMainWindow):
    print("home.py")
    def __init__(self):
        super(Home, self).__init__()
        loadUi("home.ui", self)
        self.setWindowTitle("Home")
        # Display current date
        self.lDate.setText(str(datetime.date.today()))
        # Insert widget into tabs
        self.tabInvoices_w = ListInvoice()  # <---
        lay = QVBoxLayout(self.tabInvoices) # <---
        lay.addWidget(self.tabInvoices_w)   # <---

2。推广小部件

使用Qt Designer推广ListInvoice，有关更多信息，您可以查看以下答案：

考虑解决方案是将 home.ui 更改为：

<?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>800</width>
    <height>500</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0">
     <widget class="QLabel" name="lDate">
      <property name="text">
       <string>TextLabel</string>
      </property>
     </widget>
    </item>
    <item row="1" column="0">
     <widget class="QTabWidget" name="tabWidget">
      <property name="tabPosition">
       <enum>QTabWidget::West</enum>
      </property>
      <property name="currentIndex">
       <number>3</number>
      </property>
      <property name="elideMode">
       <enum>Qt::ElideNone</enum>
      </property>
      <widget class="QWidget" name="tabHome">
       <attribute name="title">
        <string>Home</string>
       </attribute>
       <layout class="QGridLayout" name="gridLayout_2"/>
      </widget>
      <widget class="QWidget" name="tabCompanies">
       <attribute name="title">
        <string>Companies</string>
       </attribute>
      </widget>
      <widget class="QWidget" name="tabProjects">
       <attribute name="title">
        <string>Projects</string>
       </attribute>
      </widget>
      <widget class="ListInvoice" name="tabInvoices">
       <attribute name="title">
        <string>Invoices</string>
       </attribute>
      </widget>
     </widget>
    </item>
   </layout>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <customwidgets>
  <customwidget>
   <class>ListInvoice</class>
   <extends>QWidget</extends>
   <header>listInvoice</header>
   <container>1</container>
  </customwidget>
 </customwidgets>
 <resources/>
 <connections/>
</ui>

并删除家庭类中的self.tabInvoices = ListInvoice()，因为这是不必要的。

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