我正在嘗試重做這個 Qt 代碼https://github.com/laserpants/qt-material-widgets但使用 Python 和 PyQt4 并且我遇到了動畫問題。我想重新創建示例的復選框，除動畫外一切正常；它不更新。主要問題是我想保留按鈕的 stateMachine 和轉換，但我找到的解決方案不使用它們。我只希望圖標在單擊時淡入淡出任何想法為什么這不起作用？class materialCheckBox(QWidget): clicked = pyqtSignal() def __init__(self, parent): super(materialCheckBox,self).__init__(parent) self.setProperty("value", bool) checkedIcon = materialIcon(self, "C:/Users/User/.qgis2/python/plugins/Material/icons/baseline-check_box-24px.svg") uncheckedIcon = materialIcon(self, "C:/Users/User/.qgis2/python/plugins/Material/icons/baseline-check_box_outline_blank-24px.svg") self.stateMachine = QStateMachine() self.checkedState = QState() self.checkedState.assignProperty(self, "value", True) self.checkedState.assignProperty(checkedIcon, "opacity", 1.0) self.checkedState.assignProperty(uncheckedIcon, "opacity", 0.0) self.uncheckedState = QState() self.uncheckedState.assignProperty(self, "value", False) self.uncheckedState.assignProperty(checkedIcon, "opacity", 0.0) self.uncheckedState.assignProperty(uncheckedIcon, "opacity", 1.0) self.stateMachine.addState(self.checkedState) self.stateMachine.addState(self.uncheckedState) self.stateMachine.setInitialState(self.uncheckedState) transition1 = self.checkedState.addTransition(self.clicked, self.uncheckedState) animation1 = QPropertyAnimation(checkedIcon, "opacity", self) animation1.setDuration(2000) transition1.addAnimation(animation1) animation2 = QPropertyAnimation(uncheckedIcon, "opacity", self) animation2.setDuration(2000) transition1.addAnimation(animation2)
1 回答
幕布斯7119047
TA貢獻1794條經驗 獲得超8個贊
每次不透明度更改時都必須調用 update() 方法，因此創建 pyqtProperty 比創建動態屬性更好：
import os
from PyQt4 import QtCore, QtGui
root_path = os.path.dirname(os.path.realpath(__file__))
icons_path = file = os.path.join(root_path, "icons")
class MaterialCheckBox(QtGui.QWidget):
clicked = QtCore.pyqtSignal()
toggled = QtCore.pyqtSignal(bool)
def __init__(self, parent=None):
super(MaterialCheckBox, self).__init__(parent)
self._is_checked = False
checkedIcon = MaterialIcon(
self, os.path.join(icons_path, "baseline-check_box-24px.svg")
)
uncheckedIcon = MaterialIcon(
self,
os.path.join(
icons_path, "baseline-check_box_outline_blank-24px.svg"
),
)
stateMachine = QtCore.QStateMachine(self)
checkedState = QtCore.QState()
checkedState.assignProperty(self, b"checked", True)
checkedState.assignProperty(checkedIcon, b"opacity", 1.0)
checkedState.assignProperty(uncheckedIcon, b"opacity", 0.0)
uncheckedState = QtCore.QState()
uncheckedState.assignProperty(self, b"checked", False)
uncheckedState.assignProperty(checkedIcon, b"opacity", 0.0)
uncheckedState.assignProperty(uncheckedIcon, b"opacity", 1.0)
stateMachine.addState(checkedState)
stateMachine.addState(uncheckedState)
stateMachine.setInitialState(uncheckedState)
duration = 2000
transition1 = checkedState.addTransition(self.clicked, uncheckedState)
animation1 = QtCore.QPropertyAnimation(
checkedIcon, b"opacity", self, duration=duration
)
transition1.addAnimation(animation1)
animation2 = QtCore.QPropertyAnimation(
uncheckedIcon, b"opacity", self, duration=duration
)
transition1.addAnimation(animation2)
transition2 = uncheckedState.addTransition(self.clicked, checkedState)
animation3 = QtCore.QPropertyAnimation(
checkedIcon, b"opacity", self, duration=duration
)
transition2.addAnimation(animation3)
animation4 = QtCore.QPropertyAnimation(
uncheckedIcon, b"opacity", self, duration=duration
)
transition2.addAnimation(animation4)
stateMachine.start()
def sizeHint(self):
return QtCore.QSize(24, 24)
def isChecked(self):
return self._is_checked
def setChecked(self, value):
if self._is_checked != value:
self._is_checked = value
self.toggled.emit(self._is_checked)
checked = QtCore.pyqtProperty(
bool, fget=isChecked, fset=setChecked, notify=toggled
)
def mousePressEvent(self, event):
self.clicked.emit()
self.update()
super(MaterialCheckBox, self).mousePressEvent(event)
class MaterialIcon(QtGui.QWidget):
opacityChanged = QtCore.pyqtSignal()
def __init__(self, parent, address):
super(MaterialIcon, self).__init__(parent)
self.icon = QtGui.QPixmap(address)
self._opacity = 0.0
def opacity(self):
return self._opacity
def setOpacity(self, o):
if o != self._opacity:
self._opacity = o
self.opacityChanged.emit()
self.update()
opacity = QtCore.pyqtProperty(
float, fget=opacity, fset=setOpacity, notify=opacityChanged
)
def paintEvent(self, event):
painter = QtGui.QPainter(self)
painter.setOpacity(self.opacity)
mask = QtGui.QPainter(self.icon)
mask.setCompositionMode(QtGui.QPainter.CompositionMode_SourceIn)
mask.fillRect(self.icon.rect(), QtGui.QColor(0, 158, 227))
mask.end()
painter.drawPixmap(0, 0, self.icon)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
w = MaterialCheckBox()
w.show()
sys.exit(app.exec_())
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