你如何得到一个小部件的孩子在Qt？ [英] How do you get a widget's children in Qt?

问题描述

我通过Qt的KeyPress函数模拟keyPresses到应用程序。所有的KeyPresses工作正常。但是，当我传递一个 QT :: Key_Enter ，它应该按下当前活动窗口的确定按钮，或 QT :: Key_Cancel 为取消按钮，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.

我想也许，因为这些按钮没有焦点，而父窗口本身有它。你怎么得到窗口的孩子？或者找到OK或Cancel按钮，这样你可以将其设置为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

您可以使用 findChild 函数与对象名称以获取特定儿童。
您可以使用 findChildren 来获取所有具有相同名称的子元素，并使用 foreach 或 QListIterator 。

You can use the findChild function with the object name to get a specific children. You can use too findChildren to get all children that have the same name and the 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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