Applcation crashes: Qt 5.15.0 Version on using Virtual keyBoard [Debug mode]

Satyakaama

Hi All

Following assertion failure is seen

ASSERT: "!this->inputPanel" in file qvirtualkeyboardinputcontext_p.cpp, line 22

Scenario :
Import Qt virtual keyboard

And use across multiple QML.

First page , no assertion failure is seen and if we navigate to next page
in the same session, assertion failure is seen

We are suspecting , multiple keyboard instance is not supported in Qt 5.15.0.

Request some one to help in solving above issue

Thanks and regards
Satya

raven-worx

@Satyakaama
are you creating a InputPanel element?
If yes, are you sure it is not destroyed while you switch to the next page?

Satyakaama

Yes. We are creating InputPanel element.And is not destroyed while switch to next page.

Regards
Satya

SGaist

Hi,

You should provide a minimal compilable example that triggers this issue.

Satyakaama

Main.qml

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.VirtualKeyboard 2.2
import QtQuick.Controls 1.4
import QtQuick.VirtualKeyboard.Settings 2.2

Window {
id: window
visible: true
width: 640
height: 480
title: qsTr("Hello World")

Loader{
    id: virtualkeyboardid
    anchors.centerIn: parent
    height:parent.height
    width:parent.width
    z:10
    source: ""     //"qrc:/KeyboardQML.qml"
    visible: true
}

TextField {
    anchors.centerIn: parent
    placeholderText: qsTr("Enter name")
}

Rectangle{
    id:rect
    height: 20
    width: 40
    border.width: 2
    border.color: "blue"
    color: "red"
    anchors.top: parent.top

    MouseArea{
        anchors.fill: parent
        onClicked: {
            virtualkeyboardid.source = "qrc:/KeyboardQML.qml" // on click of next page
        }
    }
}

InputPanel {
    id: inputPanel
    z: 99
    x: 0
    y: window.height
    anchors.bottom: parent.bottom
    anchors.right: parent.right
    width: window.width

    states: State {
        name: "visible"
        when: inputPanel.active
        PropertyChanges {
            target: inputPanel
            y: window.height - inputPanel.height
        }
    }
    transitions: Transition {
        from: ""
        to: "visible"
        reversible: true
        ParallelAnimation {
            NumberAnimation {
                properties: "y"
                duration: 250
                easing.type: Easing.InOutQuad
            }
        }
    }

    Component.onCompleted: {
        console.log("Component.onCompleted")
    }

    Component.onDestruction: {
        console.log("Component.onDestruction:Before")
        inputPanel.
        console.log("Component.onDestruction")
    }
}

}

KeyBoard.qml

import QtQuick 2.0
import QtQuick.Window 2.15
import QtQuick.VirtualKeyboard 2.2
import QtQuick.Controls 1.4

Item {
InputPanel {
id: inputPanel1
z: 99
x: 0
}
}

SGaist

Can you test with 5.15.2 ?
It did not crash for me with that version on macOS.