居中调整了 Qwizard 页面的大小

Question

>我有一个 2 页的Qwizard。

当向导打开时，它位于屏幕中间的中心。

第一页比第二页小。

单击"下一步"并显示第二页时，它会将额外的项目添加到第一页的底部，但不会使页面重新居中。

在较小的屏幕上，这意味着按钮位于底部的屏幕外，除非用户向上移动窗口，否则看不到按钮。

我尝试使用标准的QT小部件居中，但Qwizard似乎对此没有响应。

如何将向导的第二页居中以显示整个小部件？

import sys
from PyQt5.QtCore import Qt, QPoint, QIODevice, QDateTime, QSize, QObject, QProcess, pyqtSignal, QThread, QEvent, QTimer, QBasicTimer
from PyQt5.QtWidgets import  QStyle, QWidget, QMainWindow, QCompleter, QProgressBar, QFileDialog, QApplication, qApp, QLineEdit, QLabel, QComboBox, QWizard, QWizardPage, QPushButton, QVBoxLayout, QShortcut, QMessageBox, QDesktopWidget, QHBoxLayout
from PyQt5.QtGui import QPainter, QFont, QIcon, QPixmap, QPalette, QLinearGradient, QColor, QBrush, QCursor

class Wizard(QWizard):
# Initilisation of the UI and Wizard
def __init__(self, parent=None):
super(Wizard, self).__init__(parent)

self.addPage(EnterToken(self))           
self.addPage(EnterCode(self))                
class EnterToken(QWizardPage):
def __init__(self, parent=None):
super(EnterToken, self).__init__(parent)
# Spacer blank label
self.spacer = QLabel()
# Enter Token Widgets
self.label1 = QLabel()
self.enter_token_box = QLineEdit()
# empty text box for button
self.empty = QLineEdit()
self.btn = QPushButton('Enter Token')
# layout options
layout = QVBoxLayout()
layout.addWidget(self.spacer)
layout.addWidget(self.label1)
layout.addWidget(self.enter_token_box)
layout.addWidget(self.btn)
self.setLayout(layout)

def _EnterToken(self):
""" Method for processing user input after the button is pressed"""
text = self.enter_token_box.text()

class EnterCode(QWizardPage):
""" Sensor Code Entry """
def __init__(self, parent=None):
super(EnterCode, self).__init__(parent)
# Spacer Label
self.spacer = QLabel()
self._five_digit = QLineEdit(self)
self.code_combo = QComboBox(self)
self.label1 = QLabel()
self.lineedit1 = QLineEdit(self)
self.lineedit2 =QLineEdit(self)
self.lineedit3 = QLineEdit(self)
self.lineedit4 = QLineEdit(self)
self.lineedit5 = QLineEdit(self)
self.lineedit6 = QLineEdit(self)
self.lineedit7 = QLineEdit(self)
self.lineedit8 = QLineEdit(self)
self.lineedit9 = QLineEdit(self)
self.lineedit10 = QLineEdit(self)

self.code_combo_list = [
'Years', 'Months', 'Weeks', 'Days', 'Hours', 'Years', 'Months', 'Weeks', 'Days', 'Hours']
for x in self.code_combo_list:
self.code_combo.addItem(x)
# num of logs combo box
self.enter_num_logs = QLineEdit(self)
self.num_logs_combo = QComboBox(self)
self.logs_label = QLabel()

self.num_logs_combo_list = [
'Years', 'Months', 'Weeks', 'Days', 'Hours', 'Years', 'Months', 'Weeks', 'Days', 'Hours']
for x in self.num_logs_combo_list:
self.num_logs_combo.addItem(x)
# ~buttons
self.btn = QPushButton('Download Data')
layout = QVBoxLayout()
layout.addWidget(self.spacer)
layout.addWidget(self.label1)
layout.addWidget(self.code_combo)
layout.addWidget(self._five_digit)
layout.addWidget(self.lineedit1)
layout.addWidget(self.lineedit2)
layout.addWidget(self.lineedit3)
layout.addWidget(self.lineedit4)
layout.addWidget(self.lineedit5)
layout.addWidget(self.lineedit6)
layout.addWidget(self.lineedit7)
layout.addWidget(self.lineedit8)
layout.addWidget(self.lineedit9)
layout.addWidget(self.lineedit10)

layout.addWidget(self.logs_label)
layout.addWidget(self.num_logs_combo)
layout.addWidget(self.enter_num_logs)
layout.addWidget(self.btn)
self.setLayout(layout)

if __name__ == '__main__':

Answer 1

如果要使窗口居中，则必须在窗口可见时进行，在这种情况下，必须使用currentIdChanged信号，但是当调用插槽时，即使新窗口也不可见，因此我们将使用QTimer稍后立即更新它。

class Wizard(QWizard):
def __init__(self, parent=None):
super(Wizard, self).__init__(parent)
self.addPage(EnterToken(self))           
self.addPage(EnterCode(self))
self.currentIdChanged.connect(self.onCurrentIdChanged)
def onCurrentIdChanged(self):
QTimer.singleShot(0, self.center_widget)
def center_widget(self):
self.window().setGeometry(
QStyle.alignedRect(
Qt.LeftToRight, 
Qt.AlignCenter,
self.window().size(), 
QApplication.desktop().availableGeometry())
)