C++ 将光标更改为沙漏/等待/忙碌光标并返回 Qt
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Change cursor to hourglass/wait/busy cursor and back in Qt
提问by sashoalm
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::finishedsignal.
我生成了一个执行冗长操作的进程，我想给出正在发生的视觉反馈，所以我想将光标更改为忙碌状态，并在收到QProcess::finished信号时将其恢复。
回答by Kamil Klimek
Qsiris solution is "widget wide". If you want to change cursor for your whole application then use
Qsiris 解决方案是“小部件范围的”。如果要更改整个应用程序的光标，请使用
QApplication::setOverrideCursor(Qt::WaitCursor);
and
和
QApplication::restoreOverrideCursor();
Note:As @Ehsan Khodarahmi pointed out, the cursor will NOT change until triggering next QT event or calling QApplication::processEvents() manually.
注意：正如@Ehsan Khodarahmi 所指出的，在触发下一个 QT 事件或手动调用 QApplication::processEvents() 之前，光标不会改变。
回答by Qsiris
Use this to set the cursor to wait when the process begins:
使用它来设置光标在进程开始时等待：
this->setCursor(Qt::WaitCursor);
And this to restore the cursor back to normal (put this in the slot for QProcess::finished)
这将光标恢复到正常状态（将其放在 QProcess::finished 的插槽中）
this->setCursor(Qt::ArrowCursor);
