Question

我有一个QTextBrowser，我想在里面选择一部分文字，我需要选择开始和结束的位置。我希望mousePressEvent和mouseReleaseEvent能够做到这一点。这是我的代码，

class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
    def set_text(self):
        self.textBrowser.setText('test strings are here')

textBrowser位于MainWindow中。如何在textBrowser

中为文本实现mousePressEvent和mouseReleaseEvent

Answer 1

如果您想要跟踪事件但无法覆盖该类，解决方案是安装事件过滤器，在您的情况下，仅安装MouseButtonRelease事件，我们必须过滤viewport() QTextBrowser：

import sys

from PyQt5.QtCore import QEvent
from PyQt5.QtWidgets import QMainWindow, QApplication

import TeamInsight


class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        self.browserInput.viewport().installEventFilter(self)
        self.browserInput.setText("some text")

    def eventFilter(self, obj, event):
        if obj is self.browserInput.viewport():
            if event.type() == QEvent.MouseButtonRelease:
                if self.browserInput.textCursor().hasSelection():
                    start = self.browserInput.textCursor().selectionStart()
                    end = self.browserInput.textCursor().selectionEnd()
                    print(start, end)
            elif event.type() == QEvent.MouseButtonPress:
                print("event mousePressEvent")
        return QMainWindow.eventFilter(self, obj, event)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

使用mousePressEvent（）和mouseReleaseEvent（）在QTextBrowser中选择文本

1 个答案: