在Qt设计器中使用自定义小部件有两种主要方法:
1升级小部件:
这是最简单、最省力的方法,如果是内部小部件,只需右键单击小部件并选择
提升到。。。
,然后在:
-
基类名称选择从中继承的类
-
-
头文件放置文件的路径,将扩展名.py改为.h
...
<widget class="RadialBar" name="widget" native="true"/>
...
<customwidgets>
<customwidget>
<class>RadialBar</class>
<extends>QWidget</extends>
<header>radialbar.h</header>
<container>1</container>
</customwidget>
</customwidgets>
...
也就是说,更改类,并在
自定义小部件
指向类的名称:
<class> NAME_OF_CLASS </class>
<extends>CLASS_EXTENDS</extends>
和文件路径将文件扩展名从.py更改为.h
<header>PATH_OF_FILE.h</header>
,即与您输入表单的数据相同。
在根小部件的情况下,它不能通过Qt设计器完成,但是我看到您已经理解了逻辑,但是您没有正确地修改所有内容,您的主要错误是指出了它们继承的类
<customwidgets>
<customwidget>
<class>MyMainWindow</class>
<extends>QMainWindow</extends> <----
<header>mymainwindow.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="MyMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>155</width>
<height>15</height>
</rect>
</property>
<layout class="QGridLayout" name="gridLayout">
<item row="0" column="0">
<widget class="QLabel" name="label_2">
<property name="text">
<string>TextLabel</string>
</property>
</widget>
</item>
<item row="0" column="2">
<widget class="QLabel" name="label">
<property name="text">
<string>TextLabel</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QLabel" name="label_3">
<property name="text">
<string>TextLabel</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>800</width>
<height>21</height>
</rect>
</property>
<widget class="QMenu" name="menuFile">
<property name="title">
<string>File</string>
</property>
<addaction name="actionExit"/>
</widget>
<addaction name="menuFile"/>
</widget>
<widget class="QStatusBar" name="statusbar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>3</width>
<height>18</height>
</rect>
</property>
</widget>
<action name="actionExit">
<property name="text">
<string>Exit</string>
</property>
</action>
</widget>
<customwidgets>
<customwidget>
<class>MyMainWindow</class>
<extends>QMainWindow</extends>
<header>mymainwindow.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections>
<connection>
<sender>actionExit</sender>
<signal>triggered()</signal>
<receiver>MainWindow</receiver>
<slot>close()</slot>
<hints>
<hint type="sourcelabel">
<x>-1</x>
<y>-1</y>
</hint>
<hint type="destinationlabel">
<x>399</x>
<y>299</y>
</hint>
</hints>
</connection>
</connections>
</ui>
MyMain窗口.py
import sys
from PySide2.QtUiTools import QUiLoader
from PySide2.QtWidgets import QApplication, QMainWindow, QMessageBox
from PySide2.QtCore import QFile
class MyMainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setWindowTitle("Demo QtWidget App")
def closeEvent(self, event):
msgBox = QMessageBox()
msgBox.setWindowTitle("Quit?")
msgBox.setText("Exit application?")
msgBox.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
msgBox.setDefaultButton(QMessageBox.No)
ret = msgBox.exec_()
if ret == QMessageBox.Yes:
event.accept()
else:
event.ignore()
if __name__ == '__main__':
app = QApplication([])
file = QFile("custom_widget_modified.ui")
file.open(QFile.ReadOnly)
loader = QUiLoader()
loader.registerCustomWidget(MyMainWindow)
main_window = loader.load(file)
main_window.show()
sys.exit(app.exec_())
2升级小部件:
