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我需要在鼠标滚轮事件上调整verticalScrollBar()
。试图获得与horisontalScrollBar()
相同的行为。我的意思是它应该保持在垂直滚动区域的中心。 下面是代码:缩放比例调整verticalScrollBar QGraphicsView
#!/usr/bin/env python
from PySide.QtGui import *
class windowClass(QWidget):
def __init__(self):
super(windowClass, self).__init__()
self.ly = QVBoxLayout(self)
self.view = viewClass()
self.ly.addWidget(self.view)
self.resize(500, 200)
class sceneClass(QGraphicsScene):
def __init__(self):
super(sceneClass, self).__init__()
self.setSceneRect(-1000, -1000, 2000, 2000)
self.grid = 30
class viewClass(QGraphicsView):
def __init__(self):
super(viewClass, self).__init__()
self.setDragMode(QGraphicsView.RubberBandDrag)
# self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.s = sceneClass()
self.setScene(self.s)
self.scaleY = 1
self.scaleX = 1
def wheelEvent(self, event):
self.setSceneScale(event.delta())
super(viewClass, self).wheelEvent(event)
def setSceneScale(self, delta):
if delta > 0:
self.scale(self.scaleX + 0.1, self.scaleY + 0.1)
else:
self.scale(self.scaleX - 0.1, self.scaleY - 0.1)
if __name__ == '__main__':
app = QApplication([])
w = windowClass()
w.show()
app.exec_()
正如你可以看到我已经习惯setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
但它并没有奏效,因为它只是隐藏滚动条