QCompleter 支持多个项目，如 stackoverflow 标签字段

问题描述

有没有办法让 QCompleter 的 pyside 工作更类似于 StackOverflow 上的标签编辑器的工作方式?用户可以在哪里输入单词，然后如果有空格，它允许自动完成显示匹配的单词?

这篇文章似乎符合我的要求，但它是用 C++ 编写的

导入操作系统导入系统导入json从 PySide 导入 QtCore、QtGui类 ExampleWindow(QtGui.QMainWindow):def __init__(self, parent=None):super(ExampleWindow, self).__init__(parent)self.resize(300, 200)self.strings_model = QtGui.QStringListModel()self.get_data(self.strings_model)完成者 = QtGui.QCompleter()completer.setCaseSensitivity(QtCore.Qt.CaseInsensitive)completer.setModel(self.strings_model)self.ui_input = QtGui.QLineEdit()self.ui_input.setCompleter(完成者)self.ui_input.setPlaceholderText('输入描述...')self.ui_tags_list = QtGui.QListView()self.ui_tags_list.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)self.ui_tags_list.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)self.ui_tags_list.setModel(self.strings_model)# 主要布局main_layout = QtGui.QVBoxLayout()main_layout.setContentsMargins(5,5,5,5)main_layout.setSpacing(5)main_layout.addWidget(self.ui_input)main_layout.addWidget(self.ui_tags_list)main_widget = QtGui.QWidget()main_widget.setLayout(main_layout)self.setCentralWidget(main_widget)# 连接self.ui_input.returnPressed.connect(self.input_entered)def get_data(自我，模型):model.setStringList(["Animals", "Dogs", "Birds", "Cats", "Elephant", "Zebra"])def append_tag(self, val):如果不是 val:返回错误如果 val.lower() 在 [x.lower() for x in self.strings_model.stringList()]:返回错误self.strings_model.insertRow(self.strings_model.rowCount())index = self.strings_model.index(self.strings_model.rowCount()-1)self.strings_model.setData(index, val)def input_entered(self):打印从下拉列表中选择的单词应添加到 lineEdit"定义主():app = QtGui.QApplication(sys.argv)ex = ExampleWindow()例如.show()sys.exit(app.exec_())如果 __name__ == '__main__':主要的()

解决方案

你必须实现一个获取最后一个字符串的逻辑，这将是在 QComplete 到 中制作过滤器的词>setCompletionPrefix():

class LineEdit(QtGui.QLineEdit):def __init__(self, *args, **kwargs):QtGui.QLineEdit.__init__(self, *args, **kwargs)self.multipleCompleter = 无def keyPressEvent(self, event):QtGui.QLineEdit.keyPressEvent(self, event)如果不是 self.multipleCompleter:返回c = self.multipleCompleter如果 self.text() == "":返回c.setCompletionPrefix(self.cursorWord(self.text()))如果 len(c.completionPrefix()) 

Is there a way to make the QCompleter for pyside work more similar to how the Tag editor here on StackOverflow works? Where a user can type a word and then if there is a space it allows the autocomplete to display matching words?

This post seems like it does what i want but it's in C++How to force QCompleter to check second word in QLineEdit

import os
import sys
import json
from PySide import QtCore, QtGui


class ExampleWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(ExampleWindow, self).__init__(parent)
        self.resize(300, 200)

        self.strings_model = QtGui.QStringListModel()
        self.get_data(self.strings_model)
        completer = QtGui.QCompleter()
        completer.setCaseSensitivity(QtCore.Qt.CaseInsensitive)
        completer.setModel(self.strings_model)

        self.ui_input = QtGui.QLineEdit()
        self.ui_input.setCompleter(completer)
        self.ui_input.setPlaceholderText('enter description...')

        self.ui_tags_list = QtGui.QListView()
        self.ui_tags_list.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
        self.ui_tags_list.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
        self.ui_tags_list.setModel(self.strings_model)


        # main layout
        main_layout = QtGui.QVBoxLayout()
        main_layout.setContentsMargins(5,5,5,5)
        main_layout.setSpacing(5)
        main_layout.addWidget(self.ui_input)
        main_layout.addWidget(self.ui_tags_list)

        main_widget = QtGui.QWidget()
        main_widget.setLayout(main_layout)
        self.setCentralWidget(main_widget)

        # connections
        self.ui_input.returnPressed.connect(self.input_entered)


    def get_data(self, model):
        model.setStringList(["Animals", "Dogs", "Birds", "Cats", "Elephant", "Zebra"])


    def append_tag(self, val):
        if not val:
            return False

        if val.lower() in [x.lower() for x in self.strings_model.stringList()]:
            return False

        self.strings_model.insertRow(self.strings_model.rowCount())
        index = self.strings_model.index(self.strings_model.rowCount()-1)
        self.strings_model.setData(index, val)


    def input_entered(self):
        print 'selected word from drop down should be added to lineEdit'


def main():
    app = QtGui.QApplication(sys.argv)
    ex = ExampleWindow()
    ex.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

解决方案

You must implement a logic that gets the last string, this will be the word to make the filter in the QComplete through setCompletionPrefix():

class LineEdit(QtGui.QLineEdit):
    def __init__(self, *args, **kwargs):
        QtGui.QLineEdit.__init__(self, *args, **kwargs)
        self.multipleCompleter = None

    def keyPressEvent(self, event):
        QtGui.QLineEdit.keyPressEvent(self, event)
        if not self.multipleCompleter:
            return
        c = self.multipleCompleter
        if self.text() == "":
            return
        c.setCompletionPrefix(self.cursorWord(self.text()))
        if len(c.completionPrefix()) < 1:
            c.popup().hide()
            return
        c.complete()

    def cursorWord(self, sentence):
        p = sentence.rfind(" ")
        if p == -1:
            return sentence
        return sentence[p + 1:]

    def insertCompletion(self, text):
        p = self.text().rfind(" ")
        if p == -1:
            self.setText(text)
        else:
            self.setText(self.text()[:p+1]+ text)

    def setMultipleCompleter(self, completer):
        self.multipleCompleter = completer
        self.multipleCompleter.setWidget(self)
        completer.activated.connect(self.insertCompletion)


def main():
    app = QtGui.QApplication(sys.argv)
    w = LineEdit()
    completer = QtGui.QCompleter(["Animals", "Dogs", "Birds", "Cats", "Elephant", "Zebra"])
    completer.setCaseSensitivity(QtCore.Qt.CaseInsensitive)
    w.setMultipleCompleter(completer)
    w.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

这篇关于QCompleter 支持多个项目，如 stackoverflow 标签字段的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！