EdgeShadow.qml

/*
 *  SPDX-FileCopyrightText: 2016 Marco Martin <mart@kde.org>
 *
 *  SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
import QtQuick
import org.kde.kirigami as Kirigami
 
Item {
    id: shadow
    /**
     * @brief This property holds the edge of the shadow that will determine the direction of the gradient.
     * The acceptable values are:
     * * ``Qt.TopEdge``: the top edge of the content item.
     * * ``Qt.LeftEdge``: the left edge of the content item
     * * ``Qt.RightEdge``: the right edge of the content item.
     * * ``Qt.BottomEdge``: the bottom edge of the content item.
     *
     * @see Qt::Edges
     */
    property int edge: Qt.LeftEdge
 
    property int radius: Kirigami.Units.gridUnit
    implicitWidth: radius
    implicitHeight: radius
 
    Rectangle {
        x: shadow.width / 2 - width / 2
        y: shadow.height / 2 - height / 2
        width: (shadow.edge === Qt.LeftEdge || shadow.edge === Qt.RightEdge) ? shadow.height : shadow.width
        height: (shadow.edge === Qt.LeftEdge || shadow.edge === Qt.RightEdge) ? shadow.width : shadow.height
        rotation: {
            switch (shadow.edge) {
                case Qt.TopEdge: return 0;
                case Qt.LeftEdge: return 270;
                case Qt.RightEdge: return 90;
                case Qt.BottomEdge: return 180;
            }
        }
 
       gradient: Gradient {
            GradientStop {
                position: 0.0
                color: Qt.rgba(0, 0, 0, 0.25)
            }
            GradientStop {
                position: 0.20
                color: Qt.rgba(0, 0, 0, 0.1)
            }
            GradientStop {
                position: 0.35
                color: Qt.rgba(0, 0, 0, 0.02)
            }
            GradientStop {
                position: 1.0
                color:  "transparent"
            }
        }
    }
}