ukui-menu/qml/AppControls2/StyleBackground.qml

import QtQuick 2.12
import org.ukui.menu.core 1.0

Rectangle {
    property bool useStyleTransparent: true
    property int paletteRole: Palette.Base
    property int paletteGroup: Palette.Active
    property int borderColor: Palette.Base
    property real alpha: 1.0
    property real borderAlpha: 1.0

    clip: true
    border.width: 0

    function updateColor() {
        if (useStyleTransparent) {
            color = themePalette.paletteColorWithTransparency(paletteRole, paletteGroup)
        } else {
            color = themePalette.paletteColorWithCustomTransparency(paletteRole, paletteGroup, alpha)
        }
    }

    function updateBorderColor() {
        border.color = themePalette.paletteColorWithCustomTransparency(borderColor, Palette.Active, borderAlpha)
    }

    Component.onCompleted: {
        updateColor()
        updateBorderColor()
        themePalette.styleColorChanged.connect(updateColor)
        themePalette.styleColorChanged.connect(updateBorderColor)
    }
    Component.onDestruction: {
        themePalette.styleColorChanged.disconnect(updateColor)
        themePalette.styleColorChanged.disconnect(updateBorderColor)
    }

    onUseStyleTransparentChanged: {
        updateColor()
    }
    onPaletteRoleChanged: {
        updateColor()
    }
    onPaletteGroupChanged: {
        updateColor()
    }
    onAlphaChanged: {
        updateColor()
    }
    onBorderAlphaChanged: {
        updateBorderColor()
    }
    onBorderColorChanged: {
        updateBorderColor()
    }
}