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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: #climateactionsg
@NEASingapore · Post #50 · 04.05.2020 г., 05:04
It’s May the 4th! Saving the earth is in your hands, so may the force be with you. Like ice cream in this hot Singapore weather, the earth’s great ice caps are melting due to global warming! It’s time to ask ourselves if we have done enough for the earth. If not, start here: www.mewr.gov.sg/climateaction#ClimateActionSG
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@NEASingapore · Post #1043 · 20.05.2025 г., 01:03
💰 Save around $80 annually when you upgrade your refrigerator from 1-tick to 3-tick or above! 🌱 Take climate action by switching to more energy- and water-efficient appliances with your Climate Vouchers! The Climate Friendly Households Programme now offers: 🎉 Additional $100 in Climate Vouchers, on top of the $300 in 2024 for eligible HDB households (total $400!) 🏠 Now extended to all Singapore Citizen households in private properties too ⏰ Valid until 31 Dec 2027 👉 For more details: go.gov.sg/cfhp-info #EnergyEfficiency#ClimateActionSG#SustainableSG
@NEASingapore · Post #1041 · 13.05.2025 г., 03:39
💡✨ Bright savings are just a switch away. Switch 5 compact fluorescent lamps for 2-tick LED bulbs and save $32 a year! Take climate action by switching to more energy- and water-efficient appliances with your Climate Vouchers. ✅ The Climate Friendly Households Programme now offers an additional $100 in Climate Vouchers, on top of the $300 offered in 2024 for eligible HDB households. ✅ The programme has also been expanded to include Singapore Citizen households living in private residential properties in 2025. ✅ This means that all eligible HDB and private households have been issued $400 worth of Climate Vouchers. These vouchers are valid until 31 Dec 2027. More details at go.gov.sg/cfhp-info #EnergyEfficiency#ClimateActionSG#SustainableSG
@NEASingapore · Post #1037 · 06.05.2025 г., 02:46
💰𝗖𝗼𝗼𝗹 𝘀𝗮𝘃𝗶𝗻𝗴𝘀 𝗮𝗹𝗲𝗿𝘁! Upgrade to a 5-tick air-conditioner and enjoy about $450 savings in utilities a year compared to a 1-tick model. Take climate action by switching to more energy- and water-efficient appliances with your Climate Vouchers. The Climate Friendly Households Programme now offers an additional $100 in Climate Vouchers, on top of the $300 offered in 2024 for eligible HDB households. The programme has also been expanded to include Singapore Citizen households living in private residential properties in 2025. This means that all eligible HDB and private households have been issued $400 worth of Climate Vouchers. These vouchers are valid until 31 Dec 2027. More details at go.gov.sg/cfhp-info #EnergyEfficiency#ClimateActionSG#SustainableSG
@NEASingapore · Post #1026 · 15.04.2025 г., 02:02
The Climate Friendly Households Programme now offers an additional $100 in Climate Vouchers, on top of the $300 offered in 2024. It has been expanded to include Singapore Citizen households in private residential properties on top of eligible HDB households. Take climate action by switching to more energy- and water-efficient appliances with your Climate Vouchers. The vouchers are valid until 31 Dec 2027. Visit go.gov.sg/climatevouchers for more info. #ClimateActionSG#SustainableSG#EnergyEfficiency
@NEASingapore · Post #28 · 28.03.2020 г., 04:00
It's #EarthHour tonight! Don’t forget to turn off all your lights at 8.30pm today. And because we only have one earth, let’s ensure we use our resources wisely. Read more here: earthhour.org #ClimateActionSG
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@NEASingapore · Post #998 · 18.02.2025 г., 09:18
#SGBudget2025 The enhanced Climate Friendly Households Programme will now cover around 90% of households in Singapore! From 15 Apr 2025, eligible HDB households will receive an additional $100 in Climate Vouchers, on top of the existing $300 offered in 2024. The programme will also be expanded to include Singapore Citizen households living in private residential properties. This means that eligible households staying in HDB and private residential properties can claim a total of $400 worth of Climate Vouchers! These vouchers are valid until 31 Dec 2027. More info at go.gov.sg/nea-cos2025-cv #ClimateActionSG#SustainableSG
@NEASingapore · Post #908 · 26.09.2024 г., 01:00
This year's theme, 'Creating Resilient Communities through Disaster Risk Reduction and Climate Change Mitigation and Adaptation’, highlights the urgent need to build stronger, more adaptable communities in the face of global challenges. By taking climate actions such as practising the 3Rs and adopting energy-saving habits, all of us can play a part in building a more resilient and #SustainableSG🌱💪 #WorldEnvironmentalHealthDay#SustainableSG#ClimateActionSG
@NEASingapore · Post #1077 · 05.07.2025 г., 01:35
Building climate resilience will keep Singapore steady pom pi pi for the next 60 years! 💃🕺 Let’s take action for a #SustainableSG by adopting energy-saving and #ReduceReuseRecycle habits. #SG60#ClimateActionSG