qml How to simulate mouse events

[jimfar]

i want to send a mouse event to the MouseArea of a qml object ,How do you implement this feature? anyone any idea

[Pablo J. Rogina]

@jimfar given that MouseEvent and TouchEvent are equivalent from QML MouseArea point of view per this, I'd use the TouchEventSequence QML Type from the Qt Quick Test module.

[jimfar]

i am desktop app , is this way to work out this problem

[codezeug]

TouchEventSequence must apparently be created by TestCase.touchEvent().
Is there a way to use TouchEventSequence in a normal QML application that is not in unit testing mode?
Thank you.

[fcarney]

@jimfar said in qml How to simulate mouse events:

How do you implement this feature?

Like this:
main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>

#include <QMouseEvent>

class GenMouseEvent : public QObject
{
    Q_OBJECT
public:
    GenMouseEvent(QObject* parent=nullptr)
        : QObject(parent)
    {
    }

public slots:
    void sendMouseEvent(QObject* object, QPointF pos, int button){
        Qt::MouseButton type = Qt::MouseButton(button);
        auto down = new QMouseEvent(QMouseEvent::Type::MouseButtonPress, pos, type, type, Qt::KeyboardModifier::NoModifier);
        auto up = new QMouseEvent(QMouseEvent::Type::MouseButtonRelease, pos, type, type, Qt::KeyboardModifier::NoModifier);
        QCoreApplication::postEvent(object, down);
        QCoreApplication::postEvent(object, up);
    }
};

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;

    GenMouseEvent gme;

    auto context = engine.rootContext();
    context->setContextObject(&gme);

    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}

#include "main.moc"

main.qml

import QtQuick 2.12
import QtQuick.Controls 2.12
import QtQuick.Window 2.12

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Simulate MouseEvent")

    Button {
        id: button

        text: "Test Button"
        onClicked: {

            console.log("onClicked")
        }
    }

    MouseArea {
        id: mousearea

        acceptedButtons: Qt.LeftButton | Qt.RightButton

        onClicked: {
            if(mouse.button === Qt.LeftButton){
                console.log("ma clicked left")
            }
            if(mouse.button === Qt.RightButton){
                console.log("ma clicked right")
            }
        }
    }

    Component.onCompleted: {
        sendMouseEvent(button, Qt.point(0,0), Qt.LeftButton)
        sendMouseEvent(button, Qt.point(0,0), Qt.RightButton)

        sendMouseEvent(mousearea, Qt.point(0,0), Qt.LeftButton)
        sendMouseEvent(mousearea, Qt.point(0,0), Qt.RightButton)
    }
}