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Изворен канал @pythonotes · Post #381 · 23 окт.
Установить свойства виджета в PySide можно не только через соответствующие методы и конструктор класса. Можно их изменять с помощью метода setProperty по имени. btn = QPushButton("Click Me") btn.setProperty("flat", True) Это аналогично вызову btn.setFlat(True) Если указать несуществующее свойство, то оно просто создается btn.setProperty("btnType", "super") Получить его значение можно методом .property(name) btn_type = btn.property("btnType") Когда это может быть полезно? ▫️Можно просто хранить какие то данные в виджете и потом их доставать обратно widget = QWidget() widget.setProperty('my_data', 123) print(widget.property('my_data')) ▫️ Назначая эти свойства разным виджетам можно потом отличить виджеты во время итераци по ним. Например, найти все кнопки со свойством my_data="superbtn". Но ведь вместо кастомного свойства можно использовать objectName, будет тот же результат. Да, но y ObjectName есть ограничение - только строки. ▫️ Если нам потребуется не просто поиск а, например, сортировка по числу, то свойства позволяют нам это сделать. Поддерживается любой тип данных widget.setProperty('my_data', {'Key': 'value'}) widget.setProperty('order', 1) all_widgets.sort(key=w: w.property('order')) Но ведь Python позволяет всё вышеперечисленное сделать простым созданием атрибута у объекта widget.order = 1 widget.my_data = 123 Да, но я думаю что не надо объяснять почему не стоит так делать. К тому же, если у виджета нет свойства то метод .property(name) вернет None, а отсутствующий атрибут выбросит исключение. ▫️ Действительно полезное применение кастомным свойствам - контроль стилей. Здесь атрибутами не обойтись, нужны именно свойства. Дело в том, что в селекторах стилей можно указывать конкретные свойства виджетов на которые следует назначать стиль. Просто запустите этот код from PySide2.QtWidgets import * if __name__ == "__main__": app = QApplication([]) widget = QWidget(minimumWidth=300) layout = QVBoxLayout(widget) btn1 = QPushButton("Action 1") btn2 = QPushButton("Action 2") btn3 = QPushButton("Action 3", flat=True) layout.addWidget(btn1) layout.addWidget(btn2) layout.addWidget(btn3) # добавим кастомное свойство одной кнопке btn1.setProperty("btnType", "super") # добавляем стили widget.setStyleSheet( """ QPushButton[btnType="super"] { background-color: yellow; color: red; } QPushButton[flat="true"] { color: yellow; } """ ) widget.show() app.exec_() С помощью селектора мы избирательно назначили стили на конкретные кнопки. Как получить список всех кастомный свойств? Функция получения списка кастомных свойств отличается от получения дефолтных. def print_widget_dyn_properties(widget): for prop_name in widget.dynamicPropertyNames(): property_name = prop_name.data().decode() property_value = widget.property(property_name) print(f"{property_name}: {property_value}") #tricks#qt
Пребарај: #ourhawkercentres
@NEASingapore · Post #1024 · 09.04.2025 г., 06:06
🚨 FACT CHECK: No, you won't be fined for "choping" seats The National Environment Agency (NEA) is aware of messages claiming there are penalties for seat reservation at hawker centres. These claims are false. No “Chope-Free” zones either. We would like to remind patrons to be considerate while dining in #OurHawkerCentres. This helps ensure a pleasant dining experience for all.
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@NEASingapore · Post #328 · 28.03.2022 г., 09:40
Heading to #OurHawkerCentres? From 29 Mar, up to 5 fully vaccinated persons are allowed to dine in together at all hawker centres, where COVID-19 VDS checks, issuance of stickers and fencing will be removed, to allow greater accessibility and convenience. If you are unvaccinated or partially vaccinated, you cannot dine in but can continue to take away food. Enforcement officers will continue to conduct spot checks, and enforcement action will be taken against unvaccinated individuals found dining in. #OurHawkerCentres and markets are indoor premises, so do keep your masks on, except when eating or drinking. Even as we transit towards living with COVID-19, let’s continue to stay vigilant and continue to adhere to SMMs, to protect ourselves and our loved ones.
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@NEASingapore · Post #314 · 07.02.2022 г., 08:30
Keeping #OurHawkerCentres clean & safe is a shared responsibility. When we clear our tables, cleaners can focus on other tasks such as cleaning and disinfecting tables, enabling a faster turnover of clean tables. This benefits everyone – diners, cleaners and hawkers!
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@NEASingapore · Post #269 · 01.10.2021 г., 11:53
The recent rise in COVID-19 cases has seen seniors at higher risk of developing serious health complications, if infected. If you have elderly family members or friends, remind them not to mingle and to order takeaways instead of dining in. When visiting #OurHawkerCentres and markets, comply with Safe Management Measures (SMMs) to keep our community safe. There has been feedback that groups tend to linger and lapse into SMM breaches at specific hawker centres, and we have stepped up enforcement at these places.
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@NEASingapore · Post #59 · 02.06.2020 г., 04:26
We may not have been able to dine-in at #OurHawkerCentres but we’ve still been enjoying our favourite hawker dishes at home. As we tuck into our carrot cake and nasi padang, let’s send some appreciation to the people behind the delicious dishes at https://bit.ly/2XpTmrC
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@NEASingapore · Post #9 · 06.02.2020 г., 10:30
Food is an important part of our daily lives, and it is essential that all food handlers implement good practices to upkeep good public health hygiene and standards. Together with Singapore Food Agency (SFA), NEA is engaging stallholders at various markets and hawker centres, to provide guidance on maintaining a high level of public hygiene and cleanliness. To make it easier for stallholders to recall the 7 key good habits, a flyer is being distributed alongside an advisory outlining good practices that stallholders should carry out. The steps are simple ones that individuals can adopt in their daily work. NEA and SFA will continue liaising closely with, and providing support to, operators of food establishments, including stallholders and cleaning contractors at #OurHawkerCentres. More information is available at www.nea.gov.sg/environmental-cleaning-guidelines
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@NEASingapore · Post #581 · 06.07.2023 г., 01:02
Happy International Fried Chicken Day! Enjoy the many dishes found at #OurHawkerCentres featuring fried chicken that’s crispy on the outside, yet juicy on the inside. But do remember to order only what you can finish. #SayYEStoWasteLess
@NEASingapore · Post #279 · 01.11.2021 г., 03:45
When dabao-ing food from #OurHawkerCentres, remember to bring your own reusable containers and #SayYEStoWasteLess! P.S. If you have elderly family members or neighbours, check if they need help to dabao their meals, so that they can stay home and stay safe.
@NEASingapore · Post #1006 · 09.03.2025 г., 01:03
Clear your tray and chendol (channel) care and consideration for the next diner! #OurHawkerCentres#KeepSGClean
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@NEASingapore · Post #1002 · 02.03.2025 г., 01:02
Cut the crab with table litter - let’s keep #OurHawkerCentres clean! #KeepSGClean
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@NEASingapore · Post #991 · 13.02.2025 г., 01:05
Your meal tells a story. Make sure the ending is clean. #OurHawkerCentres#KeepSGClean
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@NEASingapore · Post #977 · 19.01.2025 г., 01:05
3 steps to elevate your dining game: Eat > Enjoy > Return. #OurHawkerCentres#KeepSGClean
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