是的，我看到了：
...但这些方法似乎都不适用于我的示例：
基本上，这是一个尝试使用 QtAwesome 为 QMessageBox 提供旋转图标的示例； QtAwesome 中有一个类
Spin_updateimport sys
from PyQt5.QtWidgets import QApplication, QWidget, QMessageBox
import qtawesome as qta
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setGeometry(300, 300, 300, 220)
self.setWindowTitle('Hello World')
self.show()
msgBox = QMessageBox( QMessageBox.Information, "Title", "Content ...", QMessageBox.Cancel )
orig_ipmsize = msgBox.iconPixmap().size()
print(orig_ipmsize.width(), orig_ipmsize.height()) # 0 0 for QMessageBox.NoIcon; 32 32 for QMessageBox.Information
animation = qta.Spin(msgBox, autostart=True)
DO_MONKEYPATCH = 2 # 1 or 2
if DO_MONKEYPATCH == 1:
old_anim_update = animation._update
def new_anim_update(self):
old_anim_update(self) # TypeError: Spin._update() takes 1 positional argument but 2 were given
print("new_anim_update")
animation._update = new_anim_update.__get__(animation, qta.Spin) # https://stackoverflow.com/a/28127947
elif DO_MONKEYPATCH == 2:
def update_decorator(method):
def decorate_update(self=None):
method(self) # TypeError: Spin._update() takes 1 positional argument but 2 were given
print("decorate_update")
return decorate_update
animation._update = update_decorator(animation._update) # https://stackoverflow.com/a/8726680
#print(animation._update)
spin_icon = qta.icon('fa5s.spinner', color='red', animation=animation)
msgBox.setIconPixmap(spin_icon.pixmap(orig_ipmsize)) #msgBox.setIcon(spin_icon)
#animation.start()
returnValue = msgBox.exec()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
但是，无论我选择哪种
DO_MONKEYPATCHTypeError: Spin._update() takes 1 positional argument but 2 were given好吧，只是注意到在编写问题时这两个错误是如何应用的，并发现如果我将“旧方法”调用更改为不使用
(self)old_anim_update(self)method(self)old_anim_update()method()DO_MONKEYPATCHDO_MONKEYPATCHselfimport sys
from PyQt5.QtWidgets import QApplication, QWidget, QMessageBox
import qtawesome as qta
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.setGeometry(300, 300, 300, 220)
self.setWindowTitle('Hello World')
self.show()
msgBox = QMessageBox( QMessageBox.Information, "Title", "Content ...", QMessageBox.Cancel )
orig_ipmsize = msgBox.iconPixmap().size()
print(orig_ipmsize.width(), orig_ipmsize.height()) # 0 0 for QMessageBox.NoIcon; 32 32 for QMessageBox.Information
animation = qta.Spin(msgBox, autostart=True)
DO_MONKEYPATCH = 1 # 1 or 2
if DO_MONKEYPATCH == 1:
old_anim_update = animation._update
def new_anim_update(self):
old_anim_update() # no error
print("new_anim_update {}".format(self)) # self is <qtawesome.animation.Spin object at 0x00000238f1d45f10>
animation._update = new_anim_update.__get__(animation, qta.Spin) # https://stackoverflow.com/a/28127947
elif DO_MONKEYPATCH == 2:
def update_decorator(method):
def decorate_update(self=None):
method() # TypeError: Spin._update() takes 1 positional argument but 2 were given
print("decorate_update {}".format(self)) # self is None
return decorate_update
animation._update = update_decorator(animation._update) # https://stackoverflow.com/a/8726680
#print(animation._update)
spin_icon = qta.icon('fa5s.spinner', color='red', animation=animation)
msgBox.setIconPixmap(spin_icon.pixmap(orig_ipmsize)) #msgBox.setIcon(spin_icon)
#animation.start()
returnValue = msgBox.exec()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
所以，似乎
DO_MONKEYPATCH == 1old_anim_update()self仅执行
old_anim_update()selfold_anim_updateself当您执行
update_decorator(animation._update)澄清上述内容的简化版本可能如下：
something = animation._update
something()
上面将自动调用
qta.Spin._update()animationself
selfsomething = qta.Spin._update
something(animation)
在上面的例子中，
animationselfdef _update(self)super()qta.Spin._update(animation)请注意，虽然猴子修补通常可以很好地处理简单的方面，但通常最好创建一个子类，特别是因为这使其可重用。
一个可能的解决方案是只使用
parent_widgetclass MsgBoxSpin(qta.Spin):
def _update(self):
super()._update()
iconSize = self.parent_widget.style().pixelMetric(
QStyle.PM_MessageBoxIconSize, None, self.parent_widget)
self.parent_widget.setIconPixmap(self.icon.pixmap(
iconSize, iconSize))
def setIcon(self, icon):
self.icon = icon
...
animation = qta.Spin(msgBox, autostart=True)
spin_icon = qta.icon('fa5s.spinner', color='red', animation=animation)
animation.setIcon(spin_icon)
上面的内容是必要的，因为给定的父级实际上是消息框，并且
_update()QWidget.update()qta.Spin它可以工作，但它也有点笨重。
不过，还有另一种选择。当我只想显示 QIcon 时，我有时会使用没有设置边框或背景且禁用任何交互的虚拟按钮。
QMessageBox 在 QLabel 中显示图标，该图标具有硬编码的对象名称 (
qt_msgboxex_icon_labelQObject.findChild()class MessageBox(QMessageBox):
_iconWidget = None
def setIcon(self, icon):
if isinstance(icon, QMessageBox.Icon):
super().setIcon(icon)
if self._iconWidget:
self._iconWidget.deleteLater()
self._iconWidget = None
elif isinstance(icon, QIcon):
self.iconWidget().setIcon(icon)
def iconWidget(self):
if not self._iconWidget:
label = self.findChild(QLabel, 'qt_msgboxex_icon_label')
iconSize = self.style().pixelMetric(
QStyle.PM_MessageBoxIconSize, None, self)
pm = QPixmap(iconSize, iconSize)
pm.fill(Qt.transparent)
self.setIconPixmap(pm)
layout = label.layout()
if layout is None:
layout = QVBoxLayout(label)
layout.setContentsMargins(0, 0, 0, 0)
self._iconWidget = QPushButton()
layout.addWidget(self._iconWidget)
self._iconWidget.setStyleSheet('''
QPushButton {
border: none;
background: none;
}
''')
self._iconWidget.setIconSize(QSize(iconSize, iconSize))
self._iconWidget.setFocusPolicy(Qt.NoFocus)
self._iconWidget.setAttribute(Qt.WA_TransparentForMouseEvents)
return self._iconWidget
然后您可以使用自定义消息框功能创建图标
iconWidget()