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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: #ramadanchallenge
@wester_uz · Post #3561 · 11.03.2025 г., 00:00
#RamadanChallenge Lesson 2:🎬 📌Listening: Types of Listening Questions Part 1 and Part 2 👨🏫 Speaker: Mr. SaidIslom - Overall: 8.5 (Listening:9.0) 📆 Date: 11.03 ⏰ Time: 06:00 Venue: 📌@westerschool_IELTS
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@doniyorieltss · Post #1227 · 24.03.2023 г., 11:15
Many governments think that economic progress is their most important goal. Some people, however, think that other types of progress are equally important for a country. Discuss both these views and give your own opinion. It goes without saying that for a nation to flourish its economy needs to be robust, which may lead many authorities to believe that developments in this field should be their sole priority. However, I believe that there are other, possibly more important, aspects to consider. The natural instinct, when a nation is on the brink of a development or recession, is to question its economic soundness. After all, it is wealth that decides a country's fate in most cases. Take the UAE, a previously desolate dessert that is currently home to hundreds of thousands of high-rise buildings. If it hadn't been for its rich natural resources, it wouldn't have gone from abject 'nothingness' to what is now known as the richest nation in the world. In addition to its affluency, this nation is also renowned for its rich culture, which could be explained by the fact that it is a mainstream tourist destination. People from all backgrounds flock to this place in search of a better life, making it all the more popular. Thus, it is safe to say that the economy should, in fact, get a lot of the attention. But it would be unfair if the economy alone received all the credit for a nationwide success. There are usually other rather obscure sectors that inevitably spotlight economic developments as being responsible for any type of improvement in a country. Without a healthy population, for example, it is almost impossible for a society to exist, let alone thrive. One such example is Africa where, despite its rich resources, sickness and poverty run rampant. The economy doesn't signify at this point, as all the existing resources are squandered on treating the ever-increasing diseases. Education plays another important role in this regard. Having quality or poor education can mark the difference between a bright and a grim future for young people that will one day contribute to the national workforce. In other words, it is schools where any type of development begins. Economic strides are certainly essential — it is thanks to them that a country can compete with its counterparts in wealth and power. However, there won't be an economy to boost unless other types of progress, such as the medical and educational ones, receive the same level of attention, if not more. After all, these are the stepping stones to improved economy, which is the path to a better future. #MyWriting#RamadanChallenge @ieltsulugbeks
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@doniyorieltss · Post #1220 · 23.03.2023 г., 02:44
#WritingTask2#Economy#RamadanChallenge Many governments think that economic progress is their most important goal. Some people, however, think that other types of progress are equally important for a country. Discuss both these views and give your own opinion. I will soon send my plan and sample answers for this task. @ieltsulugbeks