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** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
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import QtQuick 2.9
import QtQuick.Templates 2.2 as T
import QtQuick.Controls.Universal 2.2

T.DelayButton {
    id: control

    implicitWidth: Math.max(background ? background.implicitWidth : 0,
                            contentItem.implicitWidth + leftPadding + rightPadding)
    implicitHeight: Math.max(background ? background.implicitHeight : 0,
                             contentItem.implicitHeight + topPadding + bottomPadding)
    baselineOffset: contentItem.y + contentItem.baselineOffset

    padding: 8
    topPadding: padding - 4
    bottomPadding: padding - 4

    property bool useSystemFocusVisuals: true

    transition: Transition {
        NumberAnimation {
            duration: control.delay * (control.pressed ? 1.0 - control.progress : 0.3 * control.progress)
        }
    }

    contentItem: Text {
        text: control.text
        font: control.font
        elide: Text.ElideRight
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter

        opacity: enabled ? 1.0 : 0.2
        color: control.Universal.foreground
    }

    background: Rectangle {
        implicitWidth: 32
        implicitHeight: 32

        color: control.down ? control.Universal.baseMediumLowColor :
               control.enabled && control.checked ? control.Universal.accent : control.Universal.baseLowColor

        Rectangle {
            visible: !control.checked
            width: parent.width * control.progress
            height: parent.height
            color: control.Universal.accent
        }

        Rectangle {
            width: parent.width
            height: parent.height
            color: "transparent"
            visible: control.hovered
            border.width: 2 // ButtonBorderThemeThickness
            border.color: control.Universal.baseMediumLowColor
        }
    }
}
