如何在pyqt5 python中突出显示qtextedit中文本中的单词?

5us2dqdw  于 2021-09-08  发布在  Java
关注(0)|答案(2)|浏览(445)

我正在用pyqt5 python创建一个文本编辑器。我想像其他任何文本/代码编辑器一样添加查找功能。在查找行编辑中输入一个或多个单词后;该单词将在文本编辑中突出显示!如何使用pyqt5 python[而不是pyqt4或任何其他编程语言]实现我的代码:

class Ui_nms_pad(QMainWindow):
    def __init__(self):
        super(Ui_nms_pad, self).__init__() 
        uic.loadUi('Nms_pad.ui', self)
        self.Find_Button.clicked.connect(self.Find_word())
    def Find_word(self):
        words = self.Find_lineEdit.text
        {highlight words in text edit}
a64a0gku

a64a0gku1#

我希望下面的代码能为您服务。

def Find_word(self):
        self.findDialog = QtWidgets.QDialog(self)

        label = QtWidgets.QLabel("Find Word:")
        self.lineEdit = QtWidgets.QLineEdit()
        self.lineEdit.setText(self.lastSearchText)
        label.setBuddy(self.lineEdit)

        self.findButton = QtWidgets.QPushButton("Find Next")
        self.findButton.setDefault(True)
        self.findButton.clicked.connect(self.searchText)

        buttonBox = QtWidgets.QDialogButtonBox(QtCore.Qt.Vertical)
        buttonBox.addButton(self.findButton, QtWidgets.QDialogButtonBox.ActionRole)

        topLeftLayout = QtWidgets.QHBoxLayout()
        topLeftLayout.addWidget(label)
        topLeftLayout.addWidget(self.lineEdit)

        leftLayout = QtWidgets.QVBoxLayout()
        leftLayout.addLayout(topLeftLayout)

        mainLayout = QtWidgets.QGridLayout()
        mainLayout.setSizeConstraint(QtWidgets.QLayout.SetFixedSize)
        mainLayout.addLayout(leftLayout, 0, 0)
        mainLayout.addWidget(buttonBox, 0, 1)
        mainLayout.setRowStretch(2, 1)
        self.findDialog.setLayout(mainLayout)

        self.findDialog.setWindowTitle("Find")
        self.findDialog.show()

    def searchText(self):
        cursor = self.text.textCursor()
        findIndex = cursor.anchor()
        text = self.lineEdit.text()
        content = self.text.toPlainText()
        length = len(text)

        self.lastSearchText = text
        index = content.find(text, findIndex)

        if -1 == index:
            errorDialog = QtWidgets.QMessageBox(self)
            errorDialog.addButton("Cancel", QtWidgets.QMessageBox.ActionRole)

            errorDialog.setWindowTitle("Find")
            errorDialog.setText("Not Found\"%s\"." % text)
            errorDialog.setIcon(QtWidgets.QMessageBox.Critical)
            errorDialog.exec_()
        else:
            start = index

            cursor = self.text.textCursor()
            cursor.clearSelection()
            cursor.movePosition(QtGui.QTextCursor.Start, QtGui.QTextCursor.MoveAnchor)
            cursor.movePosition(QtGui.QTextCursor.Right, QtGui.QTextCursor.MoveAnchor, start + length)
            cursor.movePosition(QtGui.QTextCursor.Left, QtGui.QTextCursor.KeepAnchor, length)
            cursor.selectedText()
            self.text.setTextCursor(cursor)
a0zr77ik

a0zr77ik2#

qtextedit特征 find() 它会自动突出显示文本匹配的第一次出现,并在找到文本时返回布尔值。
没有任何参数,除了搜索字符串外,搜索从当前文本光标位置开始,一直到文档末尾。在下面的示例中,如果没有找到匹配项,则通过将光标移动到文档的开头来“ Package ”搜索;这显然仅用于演示目的(如果这是首选搜索模式,您可以在开始搜索之前首先移动光标)。

def find_word(self):
        words = self.find_lineEdit.text()
        if not self.textEdit.find(words):
            # no match found, move the cursor to the beginning of the
            # document and start the search once again
            cursor = self.textEdit.textCursor()
            cursor.setPosition(0)
            self.textEdit.setTextCursor(cursor)
            self.textEdit.find(words)

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