[英]How to animate the background color of a QPushButton(change button color dynamically)
I am trying to make a pushButton in pyqt5 Python, change background color - shades, etc. from a light green, to grenn, and then, to dark green.我正在尝试在 pyqt5 Python 中制作一个按钮,将背景颜色 - 阴影等从浅绿色变为绿色,然后变为深绿色。
I have tryied some code, but nothing.我已经尝试了一些代码,但没有。
Here's my code:这是我的代码:
def colorChange(self,button):
self.anim = QPropertyAnimation(button, b"color")
self.anim.setDuration(2500)
self.anim.setLoopCount(2)
self.anim.setStartValue(QColor(0, 0, 0))
self.anim.setEndValue(QColor(255, 255, 255))
self.anim.start()
def eventFilter(self, object, event):
print(int(time.time()-self.first))
if event.type() == QtCore.QEvent.Enter:
if self.stackedWidget.currentIndex()==0:
self.pagelabel1.deleteLater()
print("Mouse is over the label")
self.stop = True
print('program stop is', self.stop)
pick=random.randrange(0,2)
print('random:',pick)
pick=0
if pick==0:
#self.doAnimation(self.right1)
self.colorChange(self.right1)
#self.right1.setStyleSheet("background-color: lightgreen")
self.right1.clicked.connect(self.nextpage)
else:
#self.doAnimation(self.left1)
self.colorChange(self.left1)
#self.left1.setStyleSheet("background-color: lightgreen")
self.left1.clicked.connect(self.nextpage)
I want the eventFilter to starts the animation, and the animation will be the color change of the button.我希望 eventFilter 启动 animation,animation 将是按钮的颜色变化。
Buttons (and other widgets) don't have a qproperty called color so you should not use QPropertyAnimation, in this case you should use Qt StyleSheet to change the color so you should use a QVariantAnimation:按钮(和其他小部件)没有名为 color 的 qproperty,因此您不应该使用 QPropertyAnimation,在这种情况下,您应该使用 Qt StyleSheet 来更改颜色,因此您应该使用 QVariantAnimation:
import functools
from PyQt5 import QtCore, QtGui, QtWidgets
def helper_function(widget, color):
widget.setStyleSheet("background-color: {}".format(color.name()))
def apply_color_animation(widget, start_color, end_color, duration=1000):
anim = QtCore.QVariantAnimation(
widget,
duration=duration,
startValue=start_color,
endValue=end_color,
loopCount=2,
)
anim.valueChanged.connect(functools.partial(helper_function, widget))
anim.start(QtCore.QAbstractAnimation.DeleteWhenStopped)
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.button = QtWidgets.QPushButton()
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(self.button)
timer = QtCore.QTimer(self, interval=5 * 1000)
timer.timeout.connect(self.handle_timeout)
timer.start()
self.handle_timeout()
def handle_timeout(self):
apply_color_animation(
self.button,
QtGui.QColor("lightgreen"),
QtGui.QColor("darkgreen"),
duration=2500,
)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
app.setStyle("fusion")
w = Widget()
w.show()
sys.exit(app.exec_())
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