QLineEdit 的问题

Question

在这段代码中，我有两行编辑和中间的一个按钮。一开始，光标在编辑的第一行。我想写一个函数（switchLineEdit），它会在两者之间切换，这意味着一旦你在启动程序后点击按钮，它会将光标移动到第二行编辑（第二行编辑将被简单地点击）和副反之亦然。这是代码：

import sys
from PyQt5 import QtWidgets, QtCore
from PyQt5.QtCore import QTimer
from PyQt5.QtWidgets import QApplication, QWidget

# ----------------------------------------------------

def switchLineEdit():
    pass

# ----------------------------------------------------

app = QApplication(sys.argv)
window = QWidget()
window.setWindowTitle("Line Edit")
window.setFixedWidth(280)
window.setFixedHeight(260)
window.move(100, 50)

window.setStyleSheet(
    "background-color: rgb(208, 208, 208);"
)

lineEdit1 = QtWidgets.QLineEdit(window)
lineEdit1.setGeometry(40, 30, 200, 40)
lineEdit1.setStyleSheet(
    "background-color: rgb(255, 255, 255);"
    "font: 11pt \'Trebuchet MS\';"
    "border: 0px solid;"
    "border-radius: 20px;"
    "padding-left: 7px;"
    "padding-right: 7px;"
)
lineEdit1.setMaxLength(30)

button = QtWidgets.QPushButton(window)
button.setGeometry(110, 100, 60, 60)
button.setStyleSheet(
    "border: 0px solid;"
    "background-color: rgb(24, 92, 36);"
    "border-radius: 30px;"
)

lineEdit2 = QtWidgets.QLineEdit(window)
lineEdit2.setGeometry(40, 190, 200, 40)
lineEdit2.setStyleSheet(
    "background-color: rgb(255, 255, 255);"
    "font: 11pt \'Trebuchet MS\';"
    "border: 0px solid;"
    "border-radius: 20px;"
    "padding-left: 7px;"
    "padding-right: 7px;"
)
lineEdit2.setMaxLength(30)

lineEdit1.returnPressed.connect(lambda: print(lineEdit1.text()))
button.clicked.connect(switchLineEdit)

window.show()
sys.exit(app.exec_())

谁能帮我写函数？

Answer 1

逻辑是使用 hasFocus() 验证 QLineEdit 是否具有焦点，并使用 setFocus() 将其设置为另一个焦点。 QPushButton 会增加复杂性，因为当它被点击时，它会获得焦点，因此很难识别谁获得了焦点，因此一个可能的解决方案是将 Qt::NoFocus 设置为 focusPolicy，这样它就不会获得焦点。

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QLineEdit, QPushButton, QVBoxLayout, QWidget


class Widget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setAttribute(Qt.WA_StyledBackground)
        self.setStyleSheet(
            """
        QWidget{
            background-color: rgb(208, 208, 208);
        }
        QLineEdit{
            background-color: rgb(255, 255, 255);
            font: 11pt 'Trebuchet MS';
            border: 0px solid;
            border-radius: 20px;
            padding-left: 7px;
            padding-right: 7px;
        }
        QPushButton{
            border: 0px solid;
            background-color: rgb(24, 92, 36);
            border-radius: 30px;
        }
            """
        )

        self.lineEdit1 = QLineEdit(maxLength=30)
        self.lineEdit1.setFixedSize(200, 40)

        self.lineEdit2 = QLineEdit(maxLength=30)
        self.lineEdit2.setFixedSize(200, 40)

        button = QPushButton(focusPolicy=Qt.NoFocus)
        button.setFixedSize(60, 60)

        lay = QVBoxLayout(self)
        lay.addWidget(self.lineEdit1, alignment=Qt.AlignCenter)
        lay.addWidget(button, alignment=Qt.AlignCenter)
        lay.addWidget(self.lineEdit2, alignment=Qt.AlignCenter)

        self.setFixedSize(280, 260)

        button.clicked.connect(self.handle_clicked)

    def handle_clicked(self):
        if self.lineEdit1.hasFocus():
            self.lineEdit2.setFocus()
        elif self.lineEdit2.hasFocus():
            self.lineEdit1.setFocus()


def main():
    app = QApplication(sys.argv)
    window = Widget()
    window.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

QLineEdit 的问题

Issues with QLineEdit

python

qlineedit

pyqt5