将函数分配给 QcomboBox 中的更改 [英] Assign a function to a change in QcomboBox

问题描述

当 QcomboBox 发生变化时，我尝试调用一个函数.当组合框更改时，它将更新图形上的 xAxis.当从组合框中选择不同的项目时，有没有办法调用函数?

I have tried to call a function when there has been a change in the QcomboBox. When the comboBox is changed it will update the xAxis on a graph. Is there a way to call a function when a different item is selected from the comboBox?

def updateGraph():
    print("update graph")

proxy = QtGui.QGraphicsProxyWidget()
xAxis = QtGui.QComboBox()
proxy.setWidget(xAxis)
xAxis.currentIndexChanged().connect(updateGraph)

当前产生的错误:

TypeError: native Qt signal is not callable

推荐答案

换行

xAxis.currentIndexChanged().connect(updateGraph)

到

xAxis.currentIndexChanged.connect(updateGraph)

使用currentIndexChanged 前面的括号，您实际上是在调用信号，当您确实想访问信号的connect 方法时.

With the parentheses in front of currentIndexChanged you are actually calling the signal, when you really want to access the signal's connect method.

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