将光标更改为沙漏/等待/忙碌光标，然后返回Qt [英] Change cursor to hourglass/wait/busy cursor and back in Qt

问题描述

我产生一个执行长时间操作的进程，我想给出视觉反馈，发生了一些事情，所以我想将光标改为忙，并在我收到 QProcess :: finished 信号。

I spawn a process that performs a lengthy operation, and I'd like to give visual feedback that something is happening, so I want to change the cursor to busy and restore it when I receive the QProcess::finished signal.

推荐答案

Qsiris解决方案是widget宽。如果你想为整个应用程序更改游标，请使用

Qsiris solution is "widget wide". If you want to change cursor for your whole application then use

QApplication::setOverrideCursor(Qt::WaitCursor);

和

QApplication::restoreOverrideCursor();

注意：@Ehsan Khodarahmi指出，直到触发下一个QT事件或手动调用QApplication :: processEvents（）。

Note: As @Ehsan Khodarahmi pointed out, the cursor will NOT change until triggering next QT event or calling QApplication::processEvents() manually.

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