[英]Using QStackedWidget in PyQt5
I have QStackedWidget in ApplicationWindow class and buttons which are going to point to different QWidgets in MenuWindow.我在 ApplicationWindow class 中有 QStackedWidget 和将指向 MenuWindow 中不同 QWidget 的按钮。 I need a help with writing a function which would change the CurrentWidget according to button clicked - eg login_button would change the CurrentWidget to LoginWindow.
我在编写 function 时需要帮助,它会根据单击的按钮更改 CurrentWidget - 例如 login_button 会将 CurrentWidget 更改为 LoginWindow。
When trying to do it myself I ran into recursion problems as I have just started with learning Python.当我自己尝试做这件事时,我遇到了递归问题,因为我刚刚开始学习 Python。
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys
class ApplicationWindow(QWidget):
def __init__(self):
super(ApplicationWindow, self).__init__()
# stack = Controller()
self.menu = MenuWindow()
self.login = LoginWindow()
self.setGeometry(0, 0, 800, 600)
self.setWindowTitle('Finance tracker')
self.setAutoFillBackground(True)
p = self.palette()
p.setColor(self.backgroundRole(), Qt.green)
self.setPalette(p)
self.stack = QStackedWidget()
self.stack.setSizePolicy(QSizePolicy.Maximum, QSizePolicy.Maximum)
self.stack.addWidget(self.menu)
self.stack.addWidget(self.login)
self.stack.setCurrentWidget(self.menu)
layout = QVBoxLayout()
layout.addWidget(self.stack)
layout.setAlignment(Qt.AlignCenter)
self.setLayout(layout)
class MenuWindow(QWidget):
def __init__(self):
super(MenuWindow, self).__init__()
self.setGeometry(0, 0, 250, 200)
box = QVBoxLayout()
self.setAutoFillBackground(True)
p = self.palette()
p.setColor(self.backgroundRole(), Qt.red)
self.setPalette(p)
label = QLabel('Welcome to finance tracker')
label.setStyleSheet('font: 24pt')
box.addWidget(label, alignment=Qt.AlignCenter)
login_button = QPushButton('Login')
login_button.clicked.connect(qApp.exit)
new_button = QPushButton('Create a new account')
new_button.clicked.connect(qApp.exit)
exit_button = QPushButton('Exit')
exit_button.clicked.connect(qApp.exit)
for button in [login_button, new_button, exit_button]:
button.setStyleSheet('font: 14pt')
button.setFixedSize(200, 50)
box.addWidget(button, alignment=Qt.AlignCenter)
self.setLayout(box)
self.show()
class LoginWindow(QWidget):
def __init__(self):
super(LoginWindow, self).__init__()
self.setGeometry(0, 0, 10, 250)
self.setAutoFillBackground(True)
p = self.palette()
p.setColor(self.backgroundRole(), Qt.blue)
self.setPalette(p)
label = QLabel('Welcome to finance tracker')
box = QVBoxLayout()
box.addWidget(label)
self.setLayout(box)
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
window = ApplicationWindow()
window.show()
sys.exit(app.exec())
Since you are using QPushButtons to switch pages I would add them to a QButtonGroup.由于您使用 QPushButtons 来切换页面,因此我会将它们添加到 QButtonGroup。 This way you can connect the
QButtonGroup.buttonClicked[int]
signal to QStackedWidget.setCurrentIndex
.这样,您可以将
QButtonGroup.buttonClicked[int]
信号连接到QStackedWidget.setCurrentIndex
。 Keep a pointer to the QButtonGroup in your MenuWindow.在 MenuWindow 中保留指向 QButtonGroup 的指针。
class MenuWindow(QWidget):
def __init__(self):
...
login_button = QPushButton('Login')
new_button = QPushButton('Create a new account')
exit_button = QPushButton('Exit')
exit_button.clicked.connect(qApp.exit)
self.btn_group = QButtonGroup()
for i, button in enumerate([login_button, new_button, exit_button]):
button.setStyleSheet('font: 14pt')
button.setFixedSize(200, 50)
box.addWidget(button, alignment=Qt.AlignCenter)
self.btn_group.addButton(button)
self.btn_group.setId(button, i + 1)
...
And now you can connect the signal and slot in your ApplicationWindow.现在您可以在 ApplicationWindow 中连接信号和插槽。
class ApplicationWindow(QWidget):
def __init__(self):
...
self.menu.btn_group.buttonClicked[int].connect(self.stack.setCurrentIndex)
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