Python PyQt5 QTextBrowser 中的所有文本都变得“过度活跃”

Question

我对 QTextBrowser 中的文本有疑问。我有类似的代码：

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class MainWindow(QMainWindow):

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)
        self.textBox = QTextBrowser(centralWidget)

        self.textBox.setOpenExternalLinks(True)

        self.button = QPushButton(centralWidget)
        self.button.setText("PUSH")
        self.button.clicked.connect(self.pressed)

        self.grid = QGridLayout(centralWidget)
        self.grid.addWidget(self.button)
        self.grid.addWidget(self.textBox)

    def pressed(self):
        id = 49309034
        url_name = "test_link"
        link = '<a href = https://stackoverflow.com/questions/{0}> {1} </a>'.format(id, url_name)
        dict = {'Key': 'Value', link: 'Test link'}
        for key, value in dict.items():
            self.textBox.append('{0}: {1}'.format(key, value))
        self.textBox.append("")


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

所以，当我按下按钮时，我得到：

但是，如果我点击链接，然后再次按下按钮 - 所有文本都变得“过度活跃”：

我认为，问题出在“下一行”。因为我已经尝试过这样的代码并且它工作正常：

string = ""
for key, value in dict.items():
    string += '{0}: {1}'.format(key, value) + '; '
self.textBox.append(string)

点击网址并按下按钮后

你能帮我解决这个问题吗？

Answer 1

在向 QTextBrowser 添加行之前尝试移动光标。 例如，像这样：

self.textBox.moveCursor(QTextCursor.Start)

---

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

class MainWindow(QMainWindow):

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        centralWidget = QWidget()
        self.setCentralWidget(centralWidget)
        self.textBox = QTextBrowser(centralWidget)

        self.textBox.setOpenExternalLinks(True)

        self.button = QPushButton(centralWidget)
        self.button.setText("PUSH")
        self.button.clicked.connect(self.pressed)

        self.grid = QGridLayout(centralWidget)
        self.grid.addWidget(self.button)
        self.grid.addWidget(self.textBox)

    def pressed(self):

        self.textBox.moveCursor(QTextCursor.Start)       # <---

        id = 49309034
        url_name = "test_link"
        link = '<a href = https://stackoverflow.com/questions/{0}> {1} </a>'.format(id, url_name)
        dict = {'Key': 'Value', link: 'Test link'}
        for key, value in dict.items():
            self.textBox.append('{0}: {1}'.format(key, value))
        self.textBox.append("")


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