Регулярно приходится писать и ревьюить код, где используется PySide2-6.
Заметил, что в подавляющем большинстве случаев настройка создаваемых базовых виджетов происходит через методы. Думаю, всем знаком такой способ.
Простой пример с кнопкой:
button = QPushButton("Click Me")
button.setMinimumWidth(300)
button.setFlat(True)
button.setStyleSheet("font-size: 20pt")
button.setToolTip("Super Button")
button.clicked.connect(lambda: print("Button clicked"))
Но есть и альтернативный способ - настройка через свойства. Это просто ключевые аргументы конструктора класса. Хоть они и не указаны в документации как аргументы, но они есть)
Этот код делает тоже самое но с помощью Property
button = QPushButton(
"Click Me",
minimumWidth=300,
flat=True,
styleSheet="font-size: 20pt",
toolTip="Super Button",
clicked=lambda: print("Button clicked"),
)
Где это может быть полезно
▫️ Это выглядит более аккуратно и коротко, уже повод использовать
▫️ Может использоваться в заполнении лейаута, когда нам не нужно никакое другое взаимодействие с виджетом и поэтому сохранять его в переменную не требуется. Например, лейбл или кнопка.
widget = QWidget(minimumWidth=400)
layout = QHBoxLayout(widget)
layout.addWidget(QLabel("Button >", alignment=Qt.AlignRight))
layout.addWidget(QPushButton("Click Me", clicked=lambda: print("Button clicked")))
widget.show()
Либо так
widget = QWidget(minimumWidth=400)
layout = QHBoxLayout(widget)
for wd in (
QLabel("Button >", alignment=Qt.AlignRight),
QPushButton("Click Me", clicked=lambda: ...)
):
layout.addWidget(wd)
widget.show()
▫️ Можно хранить настройки в каком-то конфиге или генерировать на лету, после чего передавать как kwargs.
kwargs = {"text": "Hello " * 30, "wordWrap": True}
my_label = QLabel(**kwargs)
Как получить полный список доступных свойств?
Эта функция распечатает в терминал все свойства виджета и их текущие значения
def print_widget_properties(widget):
meta_object = widget.metaObject()
for i in range(meta_object.propertyCount()):
property_ = meta_object.property(i)
property_name = property_.name()
property_value = property_.read(widget)
print(f"{property_name}: {property_value}")
#tricks#qt
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Proper storage: Store drinking water in clean containers with tightly sealed lids.
Treat water: If unsure about the safety of your water source, boil it or use a water purification method.
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✅Only consume water from safe sources
✅Stop open defaecation
✅Dispose of trash properly
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ALWAYS boil your water before drinking.
Water from CONTAMINATED storage tanks are not safe for drinking.
Make your water safe: Boil and store in properly covered containers before drinking.
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ORS must always be prepared with safe, potable drinking water.
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❌Avoid open defaecation
✅Dispose of waste in designated areas
✅Keep sewers clear from refuse
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Unsafe practices such as improper disposal of refuse & defaecating in open places put the safety of water used for drinking & personal use at risk.
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➡️Drink or use water that is boiled & stored safely
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#Cholera can spread through contaminated foods.
Make your foods safe before consumption:
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➡️WASH fruits and vegetables properly with clean water
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➡️COOK your food properly before eating
➡️USE water from safe sources
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UNCLEAN WATER, unwashed hands, and uncovered food are some of the ways #Cholera germs are spread.
Ensure your water is safe before use:
➡️BOIL water before drinking
➡️USE water from safe sources
➡️STORE water in properly covered containers
➡️STOP open defecation
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Ensure prompt administration of oral rehydration solution (ORS) to replace lost fluids and visit a health care facility immediately for proper treatment.
Do not self-medicate
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The time between #cholera infection and the appearance of symptoms is 2 hours to 5 days
Please do not self-medicate.
Visit a healthcare facility immediately for proper diagnosis and treatment.
#STOPcholera