[英]In PyQt5, how do I move to another label when clicking a button from a label on a QStackedWidget?
In PyQt5, how do I move to another label when clicking a button from a label on a StackedWidget?在 PyQt5 中,如何从 StackedWidget 上的 label 单击按钮时移动到另一个 label?
When you click pushButton_3 , I want the After screen(After label) to appear.当您单击pushButton_3时,我希望出现 After 屏幕(After 标签)。
What code should I use to display the After screen(After label)?我应该使用什么代码来显示 After 屏幕(After 标签)?
self.pushButton_3.setObjectName("pushButton_3")
self.pushButton_3.clicked.connect(self.click_next)
def click_next(self):
pass
## I want to move to After label
Full Code:完整代码:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
class Before(QWidget): ## Before label
def __init__(self):
super(Before, self).__init__()
self.label = QtWidgets.QLabel(self)
self.label.setGeometry(QtCore.QRect(240, 210, 301, 81))
font = QtGui.QFont()
font.setPointSize(30)
self.label.setFont(font)
self.label.setText("Before 화면") # 화면 == screen
self.label.setObjectName("label")
self.pushButton_3 = QtWidgets.QPushButton(self)
self.pushButton_3.setGeometry(QtCore.QRect(590, 220, 141, 61))
font = QtGui.QFont()
font.setPointSize(20)
self.pushButton_3.setText("NEXT")
self.pushButton_3.setFont(font)
self.pushButton_3.setObjectName("pushButton_3")
self.pushButton_3.clicked.connect(self.click_next)
def click_next(self):
pass
## I want to move to After label
class After(QWidget): ## After label
def __init__(self):
super(After, self).__init__()
self.label_2 = QtWidgets.QLabel(self)
self.label_2.setGeometry(QtCore.QRect(240, 210, 301, 81))
font = QtGui.QFont()
font.setPointSize(30)
self.label_2.setFont(font)
self.label_2.setText("After 화면") # 화면 == screen
self.label_2.setObjectName("label_2")
self.pushButton_4 = QtWidgets.QPushButton(self)
self.pushButton_4.setGeometry(QtCore.QRect(30, 220, 141, 61))
font = QtGui.QFont()
font.setPointSize(20)
self.pushButton_4.setText("BEFORE")
self.pushButton_4.setFont(font)
self.pushButton_4.setObjectName("pushButton_4")
self.pushButton_4.clicked.connect(self.click_before)
def click_before(self):
pass
## I want to move to Before label
class Ui_StackedWidget(QWidget):
def __init__(self):
QWidget.__init__(self, flags=Qt.Widget)
self.stk_w = QStackedWidget(self)
self.setupUi()
def setupUi(self):
self.setWindowTitle("Example3-02")
self.resize(800, 600)
widget_laytout = QBoxLayout(QBoxLayout.LeftToRight)
self.stk_w.addWidget(Before())
self.stk_w.addWidget(After())
widget_laytout.addWidget(self.stk_w)
self.setLayout(widget_laytout)
if __name__ == "__main__":
app = QApplication(sys.argv)
form = Ui_StackedWidget()
form.show()
exit(app.exec_())
You can connect those buttons from the main window to a function that switches the pages of the stacked widget.您可以将这些按钮从主 window 连接到切换堆叠小部件页面的 function。 In order to do so, you should keep a reference to those widgets, instead of creating them within
addWidget()
.为此,您应该保留对这些小部件的引用,而不是在
addWidget()
中创建它们。
class Ui_StackedWidget(QWidget):
def __init__(self):
QWidget.__init__(self, flags=Qt.Widget)
self.stk_w = QStackedWidget(self)
self.setupUi()
def setupUi(self):
self.setWindowTitle("Example3-02")
self.resize(800, 600)
widget_laytout = QBoxLayout(QBoxLayout.LeftToRight)
self.before = Before()
self.stk_w.addWidget(self.before)
self.after = After()
self.stk_w.addWidget(self.after)
widget_laytout.addWidget(self.stk_w)
self.setLayout(widget_laytout)
self.before.pushButton_3.clicked.connect(self.goToAfter)
self.after.pushButton_4.clicked.connect(self.goToBefore)
def goToAfter(self):
self.stk_w.setCurrentWidget(self.after)
def goToBefore(self):
self.stk_w.setCurrentWidget(self.before)
Note: there's no need to add the flags
argument to the __init__
, all QWidgets already have that flag set.注意:不需要将
flags
参数添加到__init__
,所有 QWidgets 都已经设置了该标志。 Also, if you're not dealing with right-to-left languages, you can just use create a QHBoxLayout() instead of a QBoxLayout(QBoxLayout.LeftToRight): while the result is the same, it's more readable and the preferred convention.此外,如果您不处理从右到左的语言,您可以只使用创建 QHBoxLayout() 而不是 QBoxLayout(QBoxLayout.LeftToRight):虽然结果相同,但它更具可读性和首选约定。
Some alternative way to other answer if you're planning to use more than 2 widgets:如果您打算使用 2 个以上的小部件,则可以使用其他答案的替代方法:
from PySide2.QtWidgets import QWidget, QApplication, QPushButton, QVBoxLayout, QLabel, QStackedWidget
import sys
# Using PySide2 as an alternative to PyQt5 - Only difference would be import route.
class Base(QWidget):
def __init__(self, label):
super().__init__()
self.label = QLabel(label)
self.previous_button = QPushButton("Next")
self.layout = QVBoxLayout()
self.layout.addWidget(self.label)
self.layout.addWidget(self.previous_button)
self.setLayout(self.layout)
class MainWindow(QWidget):
def __init__(self):
super(MainWindow, self).__init__()
self.widgets = [Base(f"{i}번 화면") for i in range(3)]
self.stack = QStackedWidget()
for widget in self.widgets:
widget.previous_button.released.connect(self.onSignal)
self.stack.addWidget(widget)
self.layout = QVBoxLayout()
self.layout.addWidget(self.stack)
self.setLayout(self.layout)
def onSignal(self):
current_idx = self.stack.currentIndex()
idx_next = 0 if current_idx == self.stack.count() - 1 else current_idx + 1
self.stack.setCurrentIndex(idx_next)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_())
You can cycle thru multiple instances in this case, or add reverse button to cycle both way.在这种情况下,您可以循环通过多个实例,或者添加反向按钮以双向循环。
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