CODEWITHSUNDEEP
linuxqtqt5
Himanshu Shekhar
Himanshu Shekhar

Reputation: 368

Does QNativeGesture works on Linux / Windows, given that the hardware supports it?

I want to add swipe gestures in my application based on Qt5. The application is intended to run primarily on Linux (laptop). I was just not able to write code because I couldn't understand how to use the class (no example code was available).

The touchpad driver supports swipe gestures (libinput). Also, synaptics (on my system at least) support multi-finger touch.

Can someone please guide me about how to use the API, and provide with some example code?

Upvotes: 0

Views: 396

Answers (1)

Kuba hasn't forgotten Monica
Kuba hasn't forgotten Monica

Reputation: 98465

Do you mean QNativeGestureEvent? You probably shouldn't mess with QNativeGestureEvent and use the higher-level framework: see Gestures in Widgets and Graphics View. The QNativeGestureEvent used to be only available on OS X; it's not really an API that's meant for wide consumption.

Alas, the QNativeGestureEvents are delivered to the widgets themselves. You would react to them by reimplementing QObject::event and acting on the event:

class MyWidget : public QWidget {
  typedef base_type = QWidget;
  ...
  bool QWidget::event(QEvent * ev) override {
    if (ev->type() == QEvent::NativeGesture) {
      auto g = static_Cast<QNativeGestureEvent*>(ev);
      ...
      return true; // if event was recognized and processed
    }
    return base_type::event(ev);
  }
};

But don't do that.

Upvotes: 0

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