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
🔥NEW RELEASE🔥
😁Forging The Guard: Mastering Foundation's Of The Clamp By Giancarlo Bodoni😁
➡️Unlock the secret to dominating your opponent with Giancarlo Bodoni’s "Forging the Guard: Mastering Foundations of the Clamp". As a 2x ADCC champion, training partner of Gordon Ryan, and student of John Danaher, Giancarlo brings you an exclusive BJJ instructional that dives deep into the world of the Clamp Guard
➡️In this series, Giancarlo breaks down the foundational elements of the Clamp Guard, a unique guard that allows for seamless sweeps, submissions, and positional control.
➡️Whether you're a beginner or an experienced practitioner, this instructional will elevate your guard game by showing you how to lock your opponent down, maintain dominant control, and transition fluidly into devastating attacks.
$197😍$19.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
🌈UFC Picks
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#BJJFanatics#NewWave#NoGi
💁♀️Buy
💁♀️
😁See the Back Take The Back: Guard Passes To Back Takes by Giancarlo Bodoni😁
➡️See the Back, Take the Back: Guard Passes to Back Takes by Giancarlo Bodoni is the definitive blueprint for turning pressure passing into relentless back-taking offense.
➡️As a 2× ADCC champion, CJI standout, and one of the most technically disciplined athletes to emerge from the legendary Danaher system, Giancarlo has built his game around one thing: getting to the back and finishing—against everyone.
$197😍$14.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#Transitions#NoGi#NewWave
💁♀️Buy
💁♀️
😁Submission Mastery: Omoplata by Giancarlo Bodoni😁
➡️Giancarlo Bodoni — 2x ADCC champion, CJI standout, and elite New Wave athlete under the legendary John Danaher and Gordon Ryan — unveils his groundbreaking system for mastering one of grappling’s most underutilized weapons: the omoplata.
➡️This is not just a submission tutorial. This is a total redefinition of the omoplata for the modern no-gi game — built on elite-level mechanics, control, and finishing options that go far beyond what you thought possible.
$197😍$14.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#Submission#NoGi#NewWave
💁♀️Buy
💁♀️
😁Forging The Guard: Reverse De La Riva By Giancarlo Bodoni😁
➡️Unlock the full potential of your guard game with Forging The Guard: Reverse De La Riva by Giancarlo Bodoni, a two-time ADCC champion and one of the most successful no-gi athletes on the planet.
➡️This comprehensive instructional series takes you deep into the intricacies of the Reverse De La Riva Guard, a position renowned for its versatility, control, and offensive potential
➡️Giancarlo breaks down each detail with clear, concise direction that will help you build a nearly impenetrable guard while simultaneously making you a constant threat from this powerful position.
$197😍$16.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
🌈UFC Picks
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#NoGi#ReverseDeLaRiva
💁♀️Buy
💁♀️
😁Forging The Guard: De La Riva By Giancarlo Bodoni😁
➡️Unlock the full potential of your guard game with Forging The Guard: De La Riva by Giancarlo Bodoni, a two-time ADCC champion and one of the most successful no-gi athletes on the planet.
➡️This comprehensive instructional series dives deep into the classic De La Riva Guard, a position known for its incredible control, sweeping power, and submission potential.
➡️Giancarlo provides clear and concise direction that will help you elevate your guard to a nearly impassable level while making you a constant offensive threat.
$197😍$16.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
🌈UFC Picks
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#NoGi#DeLaRiva
💁♀️Buy
💁♀️
🔥NEW RELEASE🔥
😁Forging the Guard: Wrestle Ups by Giancarlo Bodoni😁
➡️Giancarlo Bodoni, one of the most dominant grapplers on the planet and a top student of the legendary John Danaher, brings you a game-changing instructional designed to reframe how you think about reversals from the bottom.
➡️In Forging the Guard: Wrestle Ups, Giancarlo reveals how to seamlessly blend traditional BJJ guard positions with low-effort, high-reward wrestle ups—turning common situations into powerful sweeps and takedowns.
̶$̶1̶9̶7̶😍$14.99😍
❗️Channel Info and FAQ (MUST CHECK BEFORE BUY)❗️
📱Payment: 📱📱📱
💰Submeta FOR FREE
🌈UFC Picks
👑MasterClass
✈️@bjjfanaticsinstructionals
#GiancarloBodoni#WrestleUp#NoGi#NewWave
💁♀️Buy
💁♀️