Python PyQT5正确的布局对齐

我的

PyQt5

GUI有以下代码：

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QCalendarWidget, QMainWindow, QGridLayout, QLayout, QTableWidget, QHeaderView, QLabel, QHBoxLayout, QVBoxLayout, QLineEdit, QComboBox
from PyQt5.QtCore import QDate, Qt
from datetime import date, datetime


class CalendarWindow(QMainWindow):
    def __init__(self, parent=None):
        super(CalendarWindow, self).__init__(parent)
        self.setUpUI()

    def setUpUI(self):
        self.setGeometry(50, 50, 1200, 700)
        # Labels
        self.label_events = QLabel(self)
        self.label_new_event = QLabel(self)
        self.label_event_name = QLabel(self)
        self.label_start_date = QLabel(self)
        self.label_repeat = QLabel(self)
        self.label_description = QLabel(self)
        # Labels parameters
        self.label_events.setAlignment(Qt.AlignCenter)
        self.label_events.setText("Wydarzenia danego dnia:")

        # self.label_new_event.setAlignment(Qt.AlignCenter)
        self.label_new_event.setText("Dodaj event:")

        self.label_event_name.setText("Nazwa eventu:")
        self.label_start_date.setText("Data eventu:")
        self.label_repeat.setText("Powtarzalność eventu:")
        self.label_description.setText("Opis:")
        # TextEdits
        self.text_event_name = QLineEdit(self)
        self.text_start_date = QLineEdit(self)
        self.text_description = QLineEdit(self)
        # TextEdits parameters

        # ComboBoxes
        self.combo_repeat = QComboBox(self)
        # ComboBoxes parameters
        self.combo_repeat.addItems(
            ["No", "Day", "Week", "Two weeks", "Month", "Half a year", "Year"])

        # Widgets
        self.setWindowTitle("Python Calendar App")
        self.calendar_widget = QCalendarWidget(self)
        # User date select event
        self.calendar_widget.clicked[QDate].connect(self.dateChanged)
        self.events_list_widget = QTableWidget(self)
        self.events_list_widget.setColumnCount(5)
        self.events_list_widget.setHorizontalHeaderLabels(
            ["ID", "Name", "Date", "Repetition", "Description"])
        # Columns stretched and fit
        self.events_list_widget.horizontalHeader().setSectionResizeMode(
            QHeaderView.Stretch)
        self.main_widget = QWidget(self)
        self.main_layout = QGridLayout(self.main_widget)
        self.main_layout.sizeConstraint = QLayout.SetDefaultConstraint
        self.main_layout.addWidget(self.calendar_widget, 0, 0)
        self.init_sublayouts()
        self.main_layout.addLayout(self.sublayout_events, 0, 1)
        self.main_layout.addLayout(self.sublayout_new_event, 0, 2)
        self.main_layout.setColumnStretch(0, 1)
        self.main_layout.setColumnStretch(1, 3)
        self.main_layout.setColumnStretch(2, 2)
        self.main_widget.setLayout(self.main_layout)
        self.setCentralWidget(self.main_widget)

    def init_sublayouts(self):
        # Events sublayout
        self.sublayout_events = QVBoxLayout()
        self.sublayout_events.addWidget(self.label_events)
        self.sublayout_events.addWidget(self.events_list_widget)
        # New event sublayout
        self.sublayout_new_event = QVBoxLayout()
        self.sublayout_new_event.addWidget(self.label_new_event)
        self.sublayout_new_event_grid = QGridLayout()
        self.sublayout_new_event_grid.addWidget(self.label_event_name, 1, 0)
        self.sublayout_new_event_grid.addWidget(self.text_event_name, 1, 1)
        self.sublayout_new_event_grid.addWidget(self.label_start_date, 2, 0)
        self.sublayout_new_event_grid.addWidget(self.text_start_date, 2, 1)
        self.sublayout_new_event_grid.addWidget(self.label_repeat, 3, 0)
        self.sublayout_new_event_grid.addWidget(self.combo_repeat, 3, 1)
        self.sublayout_new_event_grid.addWidget(self.label_description, 4, 0)
        self.sublayout_new_event_grid.addWidget(self.text_description, 4, 1)
        self.sublayout_new_event.addLayout(self.sublayout_new_event_grid)

    def dateChanged(self, qdate):
        print("Date changed to:", self.getDaysEvents())
        selected_date = self.getDaysEvents()
        # self.events_list_widget.addItem(selected_date.strftime("%d/%m/%y"))

    def getDaysEvents(self):
        selected_date = self.calendar_widget.selectedDate()
        return selected_date.toPyDate()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    foo = CalendarWindow()
    foo.show()
    sys.exit(app.exec_())

当你触摸它时，它看起来是这样的：

---

我对第三栏有意见。我希望

Dodaj事件：

标签位于顶部，带标签的文本框位于其下方不远处。相关代码位于

新建事件子布局

注释下的

init_子布局

中。我试着把这些文本框变成

QGridLayout

和

Dodaj事件

，然后这个

QGridLayout

变成

QVBoxLabout

，但是你看到了发生了什么。我还尝试将我的

QGridLayout

中的每一行都单独设置为

QHBoxLayout

，结果基本相同。有办法吗？我在第2列中做了类似的事情，在第2列中，我在

QTableWidget

的顶部堆叠了一个

QLabel

，但在第3列中，它似乎没有按预期工作。

void QBoxLayout:：addStretch（int stretch=0） 将最小尺寸为零且拉伸因子为拉伸的可拉伸空间（QSpacerItem）添加到此长方体布局的末尾

试试看：

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QCalendarWidget, QMainWindow, QGridLayout, QLayout, QTableWidget, QHeaderView, QLabel, QHBoxLayout, QVBoxLayout, QLineEdit, QComboBox
from PyQt5.QtCore import QDate, Qt
from datetime import date, datetime


class CalendarWindow(QMainWindow):
    def __init__(self, parent=None):
        super(CalendarWindow, self).__init__(parent)
        self.setUpUI()

    def setUpUI(self):
        self.setGeometry(50, 50, 1200, 700)
        # Labels
        self.label_events = QLabel(self)
        self.label_new_event = QLabel(self)
        self.label_event_name = QLabel(self)
        self.label_start_date = QLabel(self)
        self.label_repeat = QLabel(self)
        self.label_description = QLabel(self)
        # Labels parameters
        self.label_events.setAlignment(Qt.AlignCenter)
        self.label_events.setText("Wydarzenia danego dnia:")

        self.label_new_event.setAlignment(Qt.AlignCenter)         # +
        self.label_new_event.setText("Dodaj event:")

        self.label_event_name.setText("Nazwa eventu:")
        self.label_start_date.setText("Data eventu:")
        self.label_repeat.setText("Powtarzalność eventu:")
        self.label_description.setText("Opis:")
        # TextEdits
        self.text_event_name = QLineEdit(self)
        self.text_start_date = QLineEdit(self)
        self.text_description = QLineEdit(self)
        # TextEdits parameters

        # ComboBoxes
        self.combo_repeat = QComboBox(self)
        # ComboBoxes parameters
        self.combo_repeat.addItems(
            ["No", "Day", "Week", "Two weeks", "Month", "Half a year", "Year"])

        # Widgets
        self.setWindowTitle("Python Calendar App")
        self.calendar_widget = QCalendarWidget(self)
        # User date select event
        self.calendar_widget.clicked[QDate].connect(self.dateChanged)
        self.events_list_widget = QTableWidget(self)
        self.events_list_widget.setColumnCount(5)
        self.events_list_widget.setHorizontalHeaderLabels(
            ["ID", "Name", "Date", "Repetition", "Description"])
        # Columns stretched and fit
        self.events_list_widget.horizontalHeader().setSectionResizeMode(
            QHeaderView.Stretch)
        self.main_widget = QWidget(self)
        self.main_layout = QGridLayout(self.main_widget)
        self.main_layout.sizeConstraint = QLayout.SetDefaultConstraint
        self.main_layout.addWidget(self.calendar_widget, 0, 0)
        self.init_sublayouts()
        self.main_layout.addLayout(self.sublayout_events, 0, 1)
        self.main_layout.addLayout(self.sublayout_new_event, 0, 2)
        self.main_layout.setColumnStretch(0, 1)
        self.main_layout.setColumnStretch(1, 3)
        self.main_layout.setColumnStretch(2, 2)
        self.main_widget.setLayout(self.main_layout)
        self.setCentralWidget(self.main_widget)

    def init_sublayouts(self):
        # Events sublayout
        self.sublayout_events = QVBoxLayout()
        self.sublayout_events.addWidget(self.label_events)
        self.sublayout_events.addWidget(self.events_list_widget)
        # New event sublayout
        self.sublayout_new_event = QVBoxLayout()
        self.sublayout_new_event.addWidget(self.label_new_event)
        self.sublayout_new_event.addStretch(1)                            # +

        self.sublayout_new_event_grid = QGridLayout()
        self.sublayout_new_event_grid.addWidget(self.label_event_name, 1, 0)
        self.sublayout_new_event_grid.addWidget(self.text_event_name, 1, 1)
        self.sublayout_new_event_grid.addWidget(self.label_start_date, 2, 0)
        self.sublayout_new_event_grid.addWidget(self.text_start_date, 2, 1)
        self.sublayout_new_event_grid.addWidget(self.label_repeat, 3, 0)
        self.sublayout_new_event_grid.addWidget(self.combo_repeat, 3, 1)
        self.sublayout_new_event_grid.addWidget(self.label_description, 4, 0)
        self.sublayout_new_event_grid.addWidget(self.text_description, 4, 1)
        self.sublayout_new_event.addLayout(self.sublayout_new_event_grid)
        self.sublayout_new_event.addStretch(20)                            # +

    def dateChanged(self, qdate):
        print("Date changed to:", self.getDaysEvents())
        selected_date = self.getDaysEvents()
        # self.events_list_widget.addItem(selected_date.strftime("%d/%m/%y"))

    def getDaysEvents(self):
        selected_date = self.calendar_widget.selectedDate()
        return selected_date.toPyDate()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    foo = CalendarWindow()
    foo.show()
    sys.exit(app.exec_())