你如何在 Qt 中获得一个小部件的孩子?

How do you get a widget#39;s children in Qt?(你如何在 Qt 中获得一个小部件的孩子?)

问题描述

我正在通过 Qt 的 KeyPress 函数模拟应用程序的 keyPresses.所有 KeyPresses 工作正常.但是，当我传递一个应该按下当前活动窗口的 OK 按钮的 QT::Key_Enter 或取消按钮的 QT::Key_Cancel 时，它什么也不做.

I'm simulating keyPresses to an application through Qt's KeyPress function. All the KeyPresses work fine. However when I pass a QT::Key_Enter which is supposed to press the OK button of the currently active window, or QT::Key_Cancel for the cancel button, it does nothing.

我在想也许，因为这些按钮没有焦点，而父窗口本身有焦点.你如何得到一个窗口的孩子?还是找到它上面的 OK 或 Cancel 按钮，这样您就可以将其设置为 activeWindow，然后成功传递 KeyPresses?

I'm thinking maybe, because these buttons don't have the focus, and the parent window itself has it. How do you get the children of a window? or rather find the OK or Cancel button on it so you could set it as the activeWindow and then pass KeyPresses successfully?

我有:

QWidget *pWin = QApplication::activeWindow;
QObjectList *pList = pWin->children();
//how do you iterate through the list and find the OK or Cancel button?

推荐答案

你可以使用 findChild() 函数使用对象名称来获取特定的孩子.

You can use the findChild() function with the object name to get a specific child.

您还可以使用 findChildren() 获取所有具有相同名称的孩子，然后使用 foreach() 或 QListIterator.

You can also use findChildren() to get all the children that have the same name and then iterate through the list using foreach() or QListIterator.

要获得按钮，您可以尝试:

To get a button you can try:

QPushButton* button = pWin->findChild<QPushButton*>("Button name");

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