[英]How to make synchronized Scroll bar in QListWidget in PyQt4
I Have two List Widget and I want to make scroll bar of two list synchronized . 我有两个List Widget,我想让两个列表的滚动条同步。 I am new to PyQt4 so i don't know how to do that. 我是PyQt4的新手,所以我不知道该怎么做。
My code is given below 我的代码如下
Code: 码:
from PyQt4 import QtGui,QtCore
import sys
def window():
app = QtGui.QApplication(sys.argv)
win = QtGui.QWidget()
main_horizontal = QtGui.QHBoxLayout()
verti_1 = QtGui.QVBoxLayout()
verti_2 = QtGui.QVBoxLayout()
list1 = QtGui.QListWidget()
for i in range(20):
list1.addItem(str(i))
list2 = QtGui.QListWidget()
for i in range(20):
list2.addItem("name" + str(i))
verti_1.addWidget(list1)
verti_2.addWidget(list2)
main_horizontal.addLayout(verti_1)
main_horizontal.addLayout(verti_2)
win.setLayout(main_horizontal)
win.resize(400,200)
win.show()
sys.exit(app.exec_())
if __name__ == "__main__":
window()
Expected Output 预期产出
I want to make these two scroll bar synchronized 我想让这两个滚动条同步
The solution is to connect the valueChanged
signal of the verticalScrollBar()
to a slot where the other verticalScrollBar()
moves, but this could generate an infinite loop so to avoid it you must use blockSignals()
as shown below: 解决方案是将verticalScrollBar()
的valueChanged
信号连接到另一个verticalScrollBar()
移动的插槽,但这可能会生成一个无限循环,所以为了避免它,你必须使用blockSignals()
,如下所示:
import sys
from functools import partial
from PyQt4 import QtGui,QtCore
def move_scrollbar(vs, value):
vs.blockSignals(True)
vs.setValue(value)
vs.blockSignals(False)
def window():
app = QtGui.QApplication(sys.argv)
win = QtGui.QWidget()
main_horizontal = QtGui.QHBoxLayout()
verti_1 = QtGui.QVBoxLayout()
verti_2 = QtGui.QVBoxLayout()
list1 = QtGui.QListWidget()
for i in range(20):
list1.addItem(str(i))
list2 = QtGui.QListWidget()
for i in range(20):
list2.addItem("name" + str(i))
verti_1.addWidget(list1)
verti_2.addWidget(list2)
vs1 = list1.verticalScrollBar()
vs2 = list2.verticalScrollBar()
vs1.valueChanged.connect(partial(move_scrollbar, vs2))
vs2.valueChanged.connect(partial(move_scrollbar, vs1))
main_horizontal.addLayout(verti_1)
main_horizontal.addLayout(verti_2)
win.setLayout(main_horizontal)
win.resize(400,200)
win.show()
sys.exit(app.exec_())
if __name__ == "__main__":
window()
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.