使用QShortcut时如何更改按钮的动画?

Question

以前，我习惯于使用button.clicked.connect(function)来触发按钮并通过setStyleSheet()设置qss(例如：QPushButton:pressed{background:#EAEAEA;}(。当通过单击鼠标按下按钮并按预期工作时，按钮将改变背景颜色。但是，目前我正在使用QShortcut来触发按钮(例如：QtCore.Qt.Key_Return(，但该按钮似乎不受qss的影响。

我使用过的代码：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(400, 300)
Form.setStyleSheet(""
"#Form {n"
"background-color: rgb(255, 255, 255);n"
"}n"
"QPushButton:hover {n"
"color: white;n"
"background-color: rgb(255, 85, 127);n"
"border-radius: 6px;n"
"font-size:16px;n"
"}n"
"n"
" QPushButton:pressed{n"
"background:#EAEAEA;n"
"color: black;n"
"font-size:16px;n"
"}")
self.frame = QtWidgets.QFrame(Form)
self.frame.setGeometry(QtCore.QRect(20, 20, 351, 241))
self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
self.frame.setObjectName("frame")
self.pushButton = QtWidgets.QPushButton(self.frame)
self.pushButton.setGeometry(QtCore.QRect(130, 100, 93, 28))
self.pushButton.setObjectName("pushButton")
# old (be affected by qss (QPushButton:pressed) when clicking mouse)
# self.pushButton.clicked.connect(self.send_message)
# new (not to be affected by qss (QPushButton:pressed) when using Enter key)
send_message_shortcut = QtWidgets.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_Return), Form)
send_message_shortcut.activated.connect(self.send_message)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Form"))
self.pushButton.setText(_translate("Form", "PushButton"))
def send_message(self):
# do something here
print("send message")

if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Form = QtWidgets.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
sys.exit(app.exec_())

Answer 1

您看不到"动画"，因为根本没有按下按钮，但您可以使用QAbstractButton.animateClick触发它：

send_message_shortcut.activated.connect(self.pushButton.animateClick)

这将设置按下的按钮(如setDown(True)(，然后在默认的 100ms 间隔后恢复它，并分别发送released和clicked信号。如果您想要不同的时间间隔，请使用 lambda(或用您自己的方法执行此操作(并以 ms 为单位设置参数。