python – 在.ui文件中调用自定义类失败

当我尝试从.ui文件中引用我的自定义类时出现此错误.我的工作有什么问题？

"QFormBuilder was unable to create a custom widget of the class 'TimelinePane'; defaulting to base class 'QWidget'." 

QWidget弹出我在.ui文件中指定的布局.问题只是自定义类.

要添加自定义类的描述,我手动修改了.ui文件(添加了整个< customwidgets>部分),这就是为什么我必须打开一个新问题,因为我还没有找到相同的Q.我怀疑.ui文件中的类的路径,但我尝试的任何选项(参见我注释掉的部分)都没有.我也猜测使用python不应该是这里的事情,但我不完全确定.还没试过C呢.

from PySide import QtGui  
from PySide import QtCore
from PySide import QtUiTools

class MyWidget(QtGui.QMainWindow):
    def __init__(self, *args):  
       apply(QtGui.QMainWindow.__init__, (self,) + args)

       loader = QtUiTools.QUiLoader()
       file = QtCore.QFile('./src/prove_qt_ui_file/prove_main_widget.ui') 
       file.open(QtCore.QFile.ReadOnly)
       self.myWidget = loader.load(file, self)
       file.close()
       self.setCentralWidget(self.myWidget)

if __name__ == '__main__':  
   import sys  
   import os
   print("Running in " + os.getcwd() + " .\n")
   app = QtGui.QApplication(sys.argv)  
   win  = MyWidget()  
   win.show()
   app.exec_()

prove_main_widget.ui

<?xml version="1.0" encoding="UTF-8" ?>
<ui version="4.0">
 <class>MyWidget</class>
 <widget class="QWidget" name="MyWidget">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>687</width>
    <height>698</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Runtime Monitor</string>
  </property>
  <layout class="QVBoxLayout">
   <property name="spacing">
    <number>0</number>
   </property>
   <property name="margin">
    <number>0</number>
   </property>
   <item>
    <widget class="QSplitter" name="splitter">
     <property name="orientation">
      <enum>Qt::Vertical</enum>
     </property>
     <property name="handleWidth">
      <number>9</number>
     </property>
     <widget class="QTreeWidget" name="warn_tree">
      <attribute name="headerVisible">
       <bool>false</bool>
      </attribute>
      <column>
       <property name="text">
        <string notr="true">1</string>
       </property>
      </column>
     </widget>
     <widget class="QTreeWidget" name="tree_all_devices">
      <attribute name="headerVisible">
       <bool>false</bool>
      </attribute>
      <column>
       <property name="text">
        <string notr="true">1</string>
       </property>
      </column>
     </widget>
     <widget class="TimelinePane" name="timeline_pane" native="true">
      <property name="minimumSize">
       <size>
        <width>0</width>
        <height>80</height>
       </size>
      </property>
      <property name="whatsThis">
       <string extracomment="Timeline"/>
      </property>
     </widget>
    </widget>
   </item>
  </layout>
 </widget>
 <customwidgets>
  <customwidget>
   <class>TimelinePane</class>
   <extends>QWidget</extends>
<!--   <header>timeline_pane</header> --> <!-- NG -->
<!--   <header>prove_qt_ui_file.timeline_pane</header> --> <!-- NG -->
   <header>src.prove_qt_ui_file.timeline_pane</header>  <!-- NG -->
  </customwidget>
 </customwidgets>
 <resources/>
 <connections/>
</ui>

timeline_pane.py

from PySide.QtGui import QWidget, QGraphicsScene, QGraphicsView, QColor, QHBoxLayout, QPushButton
class TimelinePane(QWidget):
    def __init__(self, parent):
        super(TimelinePane, self).__init__()
        print '\tTimelinePane init 1' # This doesn't print.

(环境)Ubuntu 12.04,python 2.7.3

解决方法:

理论上,要使您的自定义小部件工作,您只需要调用：

loader.registerCustomWidget(TimelinePane)

在调用loader.load()之前.在您的情况下,您需要添加相关的import语句：

from timeline_pane import TimelinePane

但是,我刚刚在Ubuntu 12.04 x86_64上使用PySide 1.1.2进行了测试,它导致了段错误. YMMV,所以请测试.

我最终实现了这个解决方法：http://www.mail-archive.com/pyside@qt-project.org/msg00306.html

简而言之,覆盖QUiLoader的creteWidget()方法,如果窗口小部件的class_name不在self.availableWidgets()中,则根据您添加的customWidgets实例变量自行实例化它.

顺便说一句,你也可以在Qt Designer中右键单击“Promote To”功能,而不是直接编辑ui文件.

标签：qt-designer,python,qt,pyside
来源： https://codeday.me/bug/20190901/1784625.html