Crashing Application at Application Exit

[marcus_1]

Hello together,

I want to use a ConicalGradient int T.Button Element, because we need some special effetcts. So we overwrite the standard behaviour of the Button Element.

But the ConicalGradient Element in the T.Button Definitions seems to cause the crash at application exit.
I have no idea why is it so. Maybe someone has an Idea whats's going on.

I have a minimal example uploaded to show the problem.

[0_1525435415456_template_button_test.zip](Uploading 100%)

Greetings

[marcus_1]

@marcus_1

It seems that i don't have enough privileges to upload the example. Maybe my description is enough to understand the problem.

[jpnurmi]

Just copy and paste the contents of the main .qml file. We don't need the C++ main() boilerplate. :)

[marcus_1]

Ok Here the Listing for the Button.qml i use:

import QtQuick 2.9
import QtQuick.Controls 2.2
import QtQuick.Controls.impl 2.1
import QtQuick.Templates 2.2 as T

import QtGraphicalEffects 1.0
import QtQuick.Controls.Styles 1.4

T.Button {
id: myButton

readonly property color teleBtnTxtClrDis: "#989998"
readonly property color teleBtnTxtClrOff: "#F2F2F2"
readonly property color teleBtnTxtClrOn:  "#958F8E"
readonly property color teleBtnTxtClrReq: "#B2B2B1"

readonly property color teleBtnBgClrDis: "#888988"
readonly property color teleBtnBgClrOff: "#888988"
readonly property color teleBtnBgClrOn:  "#FFFEFD"
readonly property color teleBtnBgClrReq: "#888988"

readonly property color teleBtnBrdClrDis: "black"
readonly property color teleBtnBrdClrOff: "blue"
readonly property color teleBtnBrdClrOn:  "white"
readonly property color teleBtnBrdClrReq: "white"


// Text
readonly property int stdTextSize: 14


// Available button states
readonly property int  btn_STATE_INACTIVE:      1
readonly property int  btn_STATE_OFF:           2
readonly property int  btn_STATE_ON:            3
readonly property int  btn_STATE_REQ:           4

property url btnImgDis: ""
property url btnImgOff: ""
property url btnImgOn:  ""
property url btnImgReq: ""

property alias  bgrectani: bgrectani

//text: qsTr("Button text can be long")
width: 80
height: width
bottomPadding: 0
topPadding: 0
rightPadding: 4
leftPadding: 4
padding: 0
checkable: false

property double scalefactor: 1.0
property int currentState

property color bgcolor: teleBtnBgClrDis
property color textcolor: teleBtnTxtClrDis
property color bordercolor:teleBtnBrdClrDis

property int margin: 0
property bool bAni: false
property bool bVis: false


contentItem: Text {
    width: parent.width
    height: parent.height
    wrapMode: Text.WordWrap
    font.pixelSize: stdTextSize
    color: textcolor
    text: parent.text
    bottomPadding: parent.bottomPadding
    topPadding: parent.topPadding
    rightPadding: parent.rightPadding
    leftPadding: parent.leftPadding
    padding: parent.padding
    horizontalAlignment: Text.AlignHCenter
    verticalAlignment: Text.AlignVCenter
}


onCurrentStateChanged: {
    // console.log("T.Button onCurrentStateChanged")
    switch(currentState)
    {
    case btn_STATE_INACTIVE:
        bgcolor =   teleBtnBgClrDis
        textcolor = teleBtnTxtClrDis
        bordercolor = teleBtnBrdClrDis
        myImage.source = btnImgDis
        margin =  0
        bAni = false
        bVis = false
        // console.log("T.Button btn_STATE_INACTIVE")
        break;
    case btn_STATE_OFF:
        bgcolor =   teleBtnBgClrOff
        textcolor = teleBtnTxtClrOff
        bordercolor = teleBtnBrdClrOff
        // console.log("btnImgOff "+ btnImgOff)
        myImage.source = btnImgOff
        //console.log("T.Button btn_STATE_OFF")
        margin =  0
        bAni = false
        bVis = false
        break;
    case btn_STATE_ON:
        bgcolor =   teleBtnBgClrOn
        textcolor = teleBtnTxtClrOn
        bordercolor = teleBtnBrdClrOn
        myImage.source = btnImgOn

        margin =  0
        bAni = false
        bVis = false

        //console.log("T.Button btn_STATE_ON")
        break;
    case btn_STATE_REQ:
        bgcolor =   teleBtnBgClrReq
        textcolor = teleBtnTxtClrReq
        bordercolor = teleBtnBrdClrReq
        myImage.source = btnImgReq
        margin =  4
        bAni = true
        bVis = true
        //console.log("T.Button btn_STATE_REQ")
        break;
    default:
        console.error("Button currentstate ist not specified.")
        break;
    }
}

property double value1: 0.00

NumberAnimation on value1 {
    from: 0.00;
    to: 1.00;
    loops: Animation.Infinite;
    duration: 8000
    running: true
}

ConicalGradient
{
    source: bgrectani
    anchors.fill: bgrectani

    gradient: Gradient
    {
        GradientStop { position: 0.00; color: "lightgrey" }
        GradientStop { position: value1 ; color: "lightgrey" }
        GradientStop { position: value1 + 0.01; color: "transparent" }
        GradientStop { position: 1.00; color: "transparent" }
    }
    visible: true
}

background: Rectangle {
    id: bgrectani
    width: myButton.width
    height: myButton.height
    color: bgcolor
    radius: bgrectani.width / 2

    Rectangle {
        id: rctbg
        width: myButton.width - margin
        height: myButton.height - margin
        border.color: bordercolor
        color: bgcolor
        border.width: 0
        radius: rctbg.width/2

        anchors.horizontalCenter: bgrectani.horizontalCenter
        anchors.verticalCenter: bgrectani.verticalCenter

        Image {
            id: myImage
            anchors.fill: parent
            source: ""
        }
    }
}

}

[jpnurmi]

Which Qt version and platform? It doesn't crash for me with Qt 5.10.1 on Linux or Windows. I tried with:

// main.qml
import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480

    Button {
        anchors.centerIn: parent
    }
}

and Button.qml with the given content in the same folder.

[marcus_1]

And the main.qml:

import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3
import "myStyle"

ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")

Rectangle {     
    Button {
        id: button1
        x: 256
        y: 86
        text: qsTr("Press Me")
    }
}

}

[marcus_1]

Sorry, i forgot this information .

My Computer has Windows 10 installed.

We run the app under Msys64 with mingw32 started.
Qt has the version 5.9.2

Greetings