一个可能的解决方案是创建一个类来处理给定 widget 的光标更新。在下面的例子中,当按下开始按钮时设置光标,当停止按钮被按下时恢复光标:
from PyQt5 import QtCore, QtGui, QtWidgets
class ManagerCursor(QtCore.QObject):
def __init__(self, parent=None):
super(ManagerCursor, self).__init__(parent)
self._movie = None
self._widget = None
self._last_cursor = None
def setMovie(self, movie):
if isinstance(self._movie, QtGui.QMovie):
if not self._movie != QtGui.QMovie.NotRunning:
self._movie.stop()
del self._movie
self._movie = movie
self._movie.frameChanged.connect(self.on_frameChanged)
self._movie.started.connect(self.on_started)
self._movie.finished.connect(self.restore_cursor)
def setWidget(self, widget):
self._widget = widget
@QtCore.pyqtSlot()
def on_started(self):
if self._widget is not None:
self._last_cursor = self._widget.cursor()
@QtCore.pyqtSlot()
def restore_cursor(self):
if self._widget is not None:
if self._last_cursor is not None:
self._widget.setCursor(self._last_cursor)
self._last_cursor = None
@QtCore.pyqtSlot()
def start(self):
if self._movie is not None:
self._movie.start()
@QtCore.pyqtSlot()
def stop(self):
if self._movie is not None:
self._movie.stop()
self.restore_cursor()
@QtCore.pyqtSlot()
def on_frameChanged(self):
pixmap = self._movie.currentPixmap()
cursor = QtGui.QCursor(pixmap)
if self._widget is not None:
if self._last_cursor is None:
self._last_cursor = self._widget.cursor()
self._widget.setCursor(cursor)
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
start_btn = QtWidgets.QPushButton("start", clicked=self.on_start)
stop_btn = QtWidgets.QPushButton("stop", clicked=self.on_stop)
self._manager = ManagerCursor(self)
movie = QtGui.QMovie("loading-icon.gif")
self._manager.setMovie(movie)
self._manager.setWidget(self)
lay = QtWidgets.QVBoxLayout(self)
lay.addWidget(start_btn)
lay.addWidget(stop_btn)
lay.addStretch()
@QtCore.pyqtSlot()
def on_start(self):
self._manager.start()
@QtCore.pyqtSlot()
def on_stop(self):
self._manager.stop()
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.resize(640, 480)
w.show()
sys.exit(app.exec_())
QApplication.setOverrideCursor(Qt.WaitCursor)
时,光标保持不变(如保持旋转循环)并且无论您悬停在哪里都会保持更新。然而,使用您的方法则不是这种情况。例如,如果您将鼠标悬停在窗口的框架或文本字段上,则光标会更改,并且由于某种原因,当我使用pickle(第二个线程)加载数据时,光标没有更新。 - mapf