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Details

Type: Bug
Resolution: Duplicate
Priority: P2: Important
Fix Version/s: None
Affects Version/s: 5.6.0
Component/s: Quick: Controls 2, Quick: Core Declarative QML
Labels:
None
Environment:
Windows 7, Using Qt 5.6 / Visual Studio 2015

Description

I have a scenario where I use a GridView with a delegate Button component with a custom background property. Once I run the application and scroll through the grid I receive several errors in my output and an equivalent number of blank spaces in the grid itself. As soon as I remove my custom background, everything works great. This occurs on both desktop and embedded builds.

The error output is: <Unknown File>: QML VisualDataModel: Error creating delegate

The main.qml code is as follows:

import QtQuick 2.6
import Qt.labs.controls 1.0
ApplicationWindow {
    visible: true
    width: 640
    height: 480

    GridView {
        id: gridThing;
        anchors.fill: parent;
        cellWidth: 75;
        cellHeight: 75;
        model: 500;

        delegate: Button {
            id: control
            text: "Test"
            width: gridThing.cellWidth;
            height: gridThing.cellHeight;
            background: Rectangle {
                implicitHeight: 20;
                implicitWidth: 20;
                color: "red";
                width: control.width;
                height: control.height;
                x: 0;
                y: 0;
            }
        }
    }
}

I also see the same problem when I use a ListView