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@talks · Post #181 · 04.07.2017 г., 16:08
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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
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@edgemarketai · Post #8087 · 02.04.2026 г., 16:45
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@edgemarketai · Post #8084 · 29.03.2026 г., 12:17
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@edgemarketai · Post #8088 · 02.04.2026 г., 16:55
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@edgemarketai · Post #8095 · 07.04.2026 г., 18:18
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@edgemarketai · Post #8113 · 19.04.2026 г., 07:48
Will Manchester United qualify for the Champions League this season? 🔴 Big games. Tight margins. Pressure moments. Make your prediction now on EdgeMarket 👇 https://edgemarket.ai/bnb/football/will-manchester-united-qualify-for-the-champions-league-this-season/statistics/69e0c10fdcd75d8e4622fcfb #ManchesterUnited#ChampionsLeague#EdgeMarket#Predictions#Football
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@edgemarketai · Post #7983 · 08.02.2026 г., 12:08
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@edgemarketai · Post #8152 · 01.05.2026 г., 14:51
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@edgemarketai · Post #8151 · 01.05.2026 г., 14:34
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@venturevillagewall · Post #3738 · 28.12.2024 г., 16:00
Bitcoin to Hit $150,000 Next Year 🔭 Galaxy Research predicts Bitcoin will cross $150,000 in H1 2024 and could reach $185,000 by Q4 2025. Analysts note Bitcoin has consistently outperformed other asset classes, expecting its market cap to reach 20% of gold's value. 🔗 Read more: Leviathan News 📉 Total market cap of AI tokens has dropped by 28% recently, now at $50.93 billion. #Bitcoin#AI#Crypto#Galaxy#MarketTrends #Bitcoin#AI#Crypto#Galaxy#MarketTrends#DeFi#Investing#Trends#Predictions #2024 #2025 #Gold#InstitutionalInvestors#TechNews#AIModels#Innovation#MarketCap#S&P500 #Cryptocurrency#Blockchain
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@venturevillagewall · Post #3744 · 29.12.2024 г., 13:00
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