CODEWITHSUNDEEP
c++qt
uniquenamehere
uniquenamehere

Reputation: 1949

Programmatically press keyboard buttons in Qt

My task sounds simple: I want to programmatically press keyboard buttons in Qt/C++. So I want some lines of code that makes the GUI think some keyboard keys was pressed.

I do not want to use windows specific API if possible.

Can this be done? If so how/where should I get started?

Upvotes: 0

Views: 4435

Answers (2)

Philippe
Philippe

Reputation: 442

The only reliable way to simulate/generate a user key event, is to use the QtTest module.

#include <QtTest>
#define QT_WIDGETS_LIB
#include <qtestkeyboard.h>

...

// For example:
QTest::keyClick(QApplication::focusWidget(), key, Qt::NoModifier);

// or even more low level:

qt_handleKeyEvent(widget->windowHandle(), QEvent::KeyPress, key, Qt::NoModifier);
qt_handleKeyEvent(widget->windowHandle(), QEvent::KeyRelease, key, Qt::NoModifier);

Upvotes: 1

VP.
VP.

Reputation: 16685

bool MyWidget::event(QEvent *event)
{
     if (event->type() == QEvent::KeyPress) {
         QKeyEvent *ke = static_cast<QKeyEvent *>(event);
         if (ke->key() == Qt::Key_Tab) {
             // special tab handling here
             return true;
         }
     } else if (event->type() == MyCustomEventType) {
         MyCustomEvent *myEvent = static_cast<MyCustomEvent *>(event);
         // custom event handling here
         return true;
     }
     return QWidget::event(event);
}

This is a simple example from here. The main idea is that you have to send KeyPress event to your window object. Here is another good example.

Upvotes: 0

Related Questions