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这篇文章主要为大家展示了怎么实现PyQt5文本输入框自动补全QLineEdit,内容简而易懂,希望大家可以学习一下,学习完之后肯定会有收获的,下面让小编带大家一起来看看吧。
一、QCompleter类
自动补全会用到的一个类
主要代码
def init_lineedit(self): # 增加自动补全 self.completer = QCompleter(items_list) # 设置匹配模式 有三种: Qt.MatchStartsWith 开头匹配(默认) Qt.MatchContains 内容匹配 Qt.MatchEndsWith 结尾匹配 self.completer.setFilterMode(Qt.MatchContains) # 设置补全模式 有三种: QCompleter.PopupCompletion(默认) QCompleter.InlineCompletion QCompleter.UnfilteredPopupCompletion self.completer.setCompletionMode(QCompleter.PopupCompletion) # 给lineedit设置补全器 self.lineedit.setCompleter(self.completer) def init_combobox(self): # 增加选项元素 for i in range(len(items_list)): self.combobox.addItem(items_list[i]) self.combobox.setCurrentIndex(-1) # 增加自动补全 self.completer = QCompleter(items_list) self.completer.setFilterMode(Qt.MatchContains) self.completer.setCompletionMode(QCompleter.PopupCompletion) self.combobox.setCompleter(self.completer)
完整代码:
import sys from PyQt5.QtWidgets import * from PyQt5.QtGui import * from PyQt5.QtCore import * ################################################ items_list=["C","C++","Java","Python","JavaScript","C#","Swift","go","Ruby","Lua","PHP"] ################################################ class Widget(QWidget): def __init__(self, *args, **kwargs): super(Widget, self).__init__(*args, **kwargs) layout = QHBoxLayout(self) self.lineedit = QLineEdit(self, minimumWidth=200) self.combobox = QComboBox(self, minimumWidth=200) self.combobox.setEditable(True) layout.addWidget(QLabel("QLineEdit", self)) layout.addWidget(self.lineedit) layout.addItem(QSpacerItem(20, 20, QSizePolicy.Expanding, QSizePolicy.Minimum)) layout.addWidget(QLabel("QComboBox", self)) layout.addWidget(self.combobox) #初始化combobox self.init_lineedit() self.init_combobox() #增加选中事件 self.combobox.activated.connect(self.on_combobox_Activate) def init_lineedit(self): # 增加自动补全 self.completer = QCompleter(items_list) # 设置匹配模式 有三种: Qt.MatchStartsWith 开头匹配(默认) Qt.MatchContains 内容匹配 Qt.MatchEndsWith 结尾匹配 self.completer.setFilterMode(Qt.MatchContains) # 设置补全模式 有三种: QCompleter.PopupCompletion(默认) QCompleter.InlineCompletion QCompleter.UnfilteredPopupCompletion self.completer.setCompletionMode(QCompleter.PopupCompletion) # 给lineedit设置补全器 self.lineedit.setCompleter(self.completer) def init_combobox(self): # 增加选项元素 for i in range(len(items_list)): self.combobox.addItem(items_list[i]) self.combobox.setCurrentIndex(-1) # 增加自动补全 self.completer = QCompleter(items_list) self.completer.setFilterMode(Qt.MatchContains) self.completer.setCompletionMode(QCompleter.PopupCompletion) self.combobox.setCompleter(self.completer) def on_combobox_Activate(self, index): print(self.combobox.count()) print(self.combobox.currentIndex()) print(self.combobox.currentText()) print(self.combobox.currentData()) print(self.combobox.itemData(self.combobox.currentIndex())) print(self.combobox.itemText(self.combobox.currentIndex())) print(self.combobox.itemText(index)) if __name__ == "__main__": app = QApplication(sys.argv) w = Widget() w.show() sys.exit(app.exec_())
二、QStandardItemModel类
最终效果
import sys # from PyQt5.Qt import QCompleter from PyQt5.Qt import QStandardItemModel from PyQt5.QtCore import Qt from PyQt5.QtCore import pyqtSlot from PyQt5.QtCore import pyqtSignal from PyQt5.QtWidgets import QFrame from PyQt5.QtWidgets import QLabel from PyQt5.QtWidgets import QWidget from PyQt5.QtWidgets import QLineEdit from PyQt5.QtWidgets import QTextEdit from PyQt5.QtWidgets import QCompleter from PyQt5.QtWidgets import QSizePolicy from PyQt5.QtWidgets import QMainWindow from PyQt5.QtWidgets import QPushButton from PyQt5.QtWidgets import QGridLayout from PyQt5.QtWidgets import QApplication from View import interface class MainWindow(QMainWindow): def __init__(self): super(MainWindow,self).__init__(None) self.setWindowTitle("对金属腐蚀性试验仪") self.initUI() def initUI(self): layout = QGridLayout() layout.setSpacing(10) self.loginLabel = QLabel("邮箱:") self.loginLabel.setAlignment(Qt.AlignRight) self.loginLabel.setStyleSheet("color:rgb(20,20,20,255);font-size:16px;font-weight:bold:text") self.loginTxt = QLineEdit() self.loginTxt.setText("admin") self.loginTxt.setPlaceholderText("User Name") self.loginTxt.setClearButtonEnabled(True) self.loginTxt.textChanged.connect(self.on_loginTxt_textChanged) #绑定槽函数 self.m_model = QStandardItemModel(0, 1, self) m_completer = QCompleter(self.m_model, self) self.loginTxt.setCompleter(m_completer) m_completer.activated[str].connect(self.onTxtChoosed) self.pwdLabel = QLabel("密码:") self.pwdLabel.setAlignment(Qt.AlignRight) self.pwdTxt = QLineEdit() self.pwdTxt.setContextMenuPolicy(Qt.NoContextMenu) #禁止复制粘贴 self.pwdTxt.setPlaceholderText("Password") self.pwdTxt.setText("admin") self.pwdTxt.setEchoMode(QLineEdit.Password) self.pwdTxt.setClearButtonEnabled(True) self.registeredBtn = QPushButton("注册") self.loginBtn = QPushButton("登陆") self.headLabel = QLabel("用户登陆") self.headLabel.resize(300,30) self.headLabel.setAlignment(Qt.AlignCenter) self.headLabel.setStyleSheet("color:rgb(10,10,10,255);font-size:25px;font-weight:bold;font-family:Roman times;") self.headLabel.setSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding) layout.addWidget(self.headLabel,0,0,1,2) policy = self.headLabel.sizePolicy() print(policy.verticalPolicy()) policy.setVerticalPolicy(1) print(policy.verticalPolicy()) # policy.setVerticalPolicy(1) layout.addWidget(self.loginLabel,1,0) layout.addWidget(self.loginTxt,1,1) layout.addWidget(self.pwdLabel,2,0) layout.addWidget(self.pwdTxt,2,1) layout.addWidget(self.registeredBtn,3,0) layout.addWidget(self.loginBtn,3,1) frame = QFrame(self) frame.setLayout(layout) self.setCentralWidget(frame) self.resize(300,150) def onTxtChoosed(self, txt): self.loginTxt.setText(txt) @pyqtSlot(str) def on_loginTxt_textChanged(self, text): if '@' in self.loginTxt.text(): return emaillist = ["@163.com", "@qq.com", "@gmail.com", "@live.com", "@126.com", "@139.com"] self.m_model.removeRows(0, self.m_model.rowCount()) for i in range(0, len(emaillist)): self.m_model.insertRow(0) self.m_model.setData(self.m_model.index(0, 0), text + emaillist[i]) if __name__ == '__main__': app = QApplication(sys.argv) mainWindow = MainWindow() mainWindow.show() mainWindow.activateWindow() mainWindow.raise_() app.exec_() del mainWindow del app
QStandardItemModel类为存储自定义数据提供了一个通用模型。
QStandardItemModel可以用作标准Qt数据类型的存储库。它是模型/视图类之一,是Qt的模型/视图框架的一部分。
QStandardItemModel提供了一个经典的基于项目的方法来处理模型。 QStandardItemModel中的项目由QStandardItem提供。
QStandardItemModel实现了QAbstractItemModel接口,这意味着该模型可用于在支持该接口的任何视图(如QListView,QTableView和QTreeView以及您自己的自定义视图)中提供数据。为了提高性能和灵活性,您可能希望子类QAbstractItemModel为不同类型的数据存储库提供支持。例如,QDirModel为底层文件系统提供了一个模型接口。
当你想要一个列表或树时,你通常会创建一个空的QStandardItemModel并使用appendRow()向模型添加项目,使用item()来访问项目。如果您的模型表示一个表格,您通常会将表格的维度传递给QStandardItemModel构造函数,并使用setItem()将项目放入表格中。您还可以使用setRowCount()和setColumnCount()来更改模型的尺寸。要插入项目,请使用insertRow()或insertColumn(),并删除项目,请使用removeRow()或removeColumn()。
您可以使用setHorizontalHeaderLabels()和setVerticalHeaderLabels()来设置模型的标题标签。
您可以使用findItems()在模型中搜索项目,并通过调用sort()对模型进行排序。
调用clear()从模型中移除所有项目。
2.2 代码理解
self.loginTxt = QLineEdit() self.loginTxt.setText("admin") self.loginTxt.setPlaceholderText("User Name") self.loginTxt.setClearButtonEnabled(True) 0 self.loginTxt.textChanged.connect(self.on_loginTxt_textChanged) #绑定槽函数 1 self.m_model = QStandardItemModel(0, 1, self) 2 m_completer = QCompleter(self.m_model, self) 3 self.loginTxt.setCompleter(m_completer) 4 m_completer.activated[str].connect(self.onTxtChoosed) def onTxtChoosed(self, txt): self.loginTxt.setText(txt) @pyqtSlot(str) def on_loginTxt_textChanged(self, text): if '@' in self.loginTxt.text(): return emaillist = ["@163.com", "@qq.com", "@gmail.com", "@live.com", "@126.com", "@139.com"] self.m_model.removeRows(0, self.m_model.rowCount()) for i in range(0, len(emaillist)): self.m_model.insertRow(0) self.m_model.setData(self.m_model.index(0, 0), text + emaillist[i])
0-将文本改变信号连接到on_loginTxt_textChanged 函数处理
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