pyqt5在qtdesigner中使用自定义的控件ExtendedComboBox

pyqt5在qtdesigner中使用自定义的控件ExtendedComboBox

1. 先找到要提升的控件对象
2. 右击 提升为
3. 按照下图填写要提升的基类，新类类名，和新类所在文件

找到要提升的右键点击提升

如图:

• 即可使用自定义的扩展控件

这里举个例，扩展控件文件 f.py 格式

from PyQt5.QtCore import QUrl, QSortFilterProxyModel, Qt
from PyQt5.QtGui import QDesktopServices
from PyQt5.QtWidgets import QComboBox, QTextEdit, QCompleter
class ExtendedComboBox(QComboBox):
    def __init__(self, parent=None):
        super(ExtendedComboBox, self).__init__(parent)
        self.setFocusPolicy(Qt.StrongFocus)
        self.setEditable(True)
        # add a filter model to filter matching items
        self.pFilterModel = QSortFilterProxyModel(self)
        self.pFilterModel.setFilterCaseSensitivity(Qt.CaseInsensitive)
        self.pFilterModel.setSourceModel(self.model())
        # add a completer, which uses the filter model
        self.completer = QCompleter(self.pFilterModel, self)
        # always show all (filtered) completions
        self.completer.setCompletionMode(QCompleter.UnfilteredPopupCompletion)
        self.setCompleter(self.completer)
        # connect signals
        self.lineEdit().textEdited.connect(self.pFilterModel.setFilterFixedString)
        self.completer.activated.connect(self.on_completer_activated)
    # on selection of an item from the completer, select the corresponding item from combobox
    def on_completer_activated(self, text):
        if text:
            index = self.findText(text)
            self.setCurrentIndex(index)
            self.activated[str].emit(self.itemText(index))
    # on model change, update the models of the filter and completer as well
    def setModel(self, model):
        super(ExtendedComboBox, self).setModel(model)
        self.pFilterModel.setSourceModel(model)
        self.completer.setModel(self.pFilterModel)
    # on model column change, update the model column of the filter and completer as well
    def setModelColumn(self, column):
        self.completer.setCompletionColumn(column)
        self.pFilterModel.setFilterKeyColumn(column)
        super(ExtendedComboBox, self).setModelColumn(column)