Touchscreen not working with any Qt based application. But it works fine with GTK ones.

is0923

I can't get touch to work with Qt widgets or QML based applications. The touchscreen (part of a multi-monitor setup) does work with GTK no problem. But any tap on a Qt based application gets completely ignored.

I'm trying to develop a touch-based application on Fedora Linux using Qt Creator. Any idea what could be causing this problem?

Asperamanca

Have you done this on your widget:

setAttribute(Qt::WA_AcceptTouchEvents);

Asperamanca

Also, please share a minimal example of what you try to do

is0923

@Asperamanca I have set that flag in QML. But even if that was the only problem in my case, I don't understand why Qt based apps don't even register taps as clicks by default like GTK does.

Here's the code for my simple app.

import QtQuick
import QtQuick.Window
import QtQuick.Controls
import QtQuick.Dialogs

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    flags: Qt.WA_AcceptTouchEvents
    Rectangle {
        id: button
        signal clicked
        property alias text: buttonLabel.text

        height: 50
        width: 150
        radius: 3
        color: "gray"

        TapHandler {
            id: tapHandler
            onTapped: console.log("clicked2")
        }

        MouseArea {
            anchors.fill: parent
            onClicked: console.log("clicked")
        }

        Text {
            id: buttonLabel
            text: "Click Me"
            color: palette.buttonText
            anchors.centerIn: parent
        }
    }

}