这里是还支持正常的点击信号对可移动按钮的例子:
from PyQt4 import QtCore, QtGui
class DragButton(QtGui.QPushButton):
def mousePressEvent(self, event):
self.__mousePressPos = None
self.__mouseMovePos = None
if event.button() == QtCore.Qt.LeftButton:
self.__mousePressPos = event.globalPos()
self.__mouseMovePos = event.globalPos()
super(DragButton, self).mousePressEvent(event)
def mouseMoveEvent(self, event):
if event.buttons() == QtCore.Qt.LeftButton:
# adjust offset from clicked point to origin of widget
currPos = self.mapToGlobal(self.pos())
globalPos = event.globalPos()
diff = globalPos - self.__mouseMovePos
newPos = self.mapFromGlobal(currPos + diff)
self.move(newPos)
self.__mouseMovePos = globalPos
super(DragButton, self).mouseMoveEvent(event)
def mouseReleaseEvent(self, event):
if self.__mousePressPos is not None:
moved = event.globalPos() - self.__mousePressPos
if moved.manhattanLength() > 3:
event.ignore()
return
super(DragButton, self).mouseReleaseEvent(event)
def clicked():
print "click as normal!"
if __name__ == "__main__":
app = QtGui.QApplication([])
w = QtGui.QWidget()
w.resize(800,600)
button = DragButton("Drag", w)
button.clicked.connect(clicked)
w.show()
app.exec_()
在mousePressEvent
我记录了初始起始位置,这将能在整个拖动更新的位置。
在mouseMoveEvent
中,我得到了控件从被点击的位置到实际原点位置的正确偏移量,以便移动是准确的。
在mouseReleaseEvent
,我检查整体移动是否大于至少一个微小的数额。如果是,那么这是一个阻力,我们忽略了正常事件不会产生“点击”信号。否则,我们允许普通事件处理程序产生点击。
来源
2012-08-31 19:19:18
jdi
@Eric在他的回答中提出了一个非常好的观点。您能否澄清这个问题,您是否想要真正的拖放事件......或者只是简单地用鼠标移动按钮 – jdi
根据您打算做的事情 - 我会查看QGraphicsView框架。你正在尝试做什么(虚拟磁铁板)将很容易完成。 –