147 lines
4.3 KiB
QML
147 lines
4.3 KiB
QML
import QtQuick 2.12
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import QtGraphicalEffects 1.0
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/*!
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An effect for standard Material Design elevation shadows
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*/
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Item {
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id: effect
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property var source
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readonly property Item sourceItem: source.sourceItem
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property int elevation: 0
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// Shadow details follow Material Design (taken from Angular Material)
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readonly property var _shadows: [
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[{offset: 0, blur: 0, spread: 0},
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{offset: 0, blur: 0, spread: 0},
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{offset: 0, blur: 0, spread: 0}],
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[{offset: 1, blur: 3, spread: 0},
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{offset: 1, blur: 1, spread: 0},
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{offset: 2, blur: 1, spread: -1}],
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[{offset: 1, blur: 5, spread: 0},
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{offset: 2, blur: 2, spread: 0},
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{offset: 3, blur: 1, spread: -2}],
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[{offset: 1, blur: 8, spread: 0},
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{offset: 3, blur: 4, spread: 0},
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{offset: 3, blur: 3, spread: -2}],
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[{offset: 2, blur: 4, spread: -1},
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{offset: 4, blur: 5, spread: 0},
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{offset: 1, blur: 10, spread: 0}],
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[{offset: 3, blur: 5, spread: -1},
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{offset: 5, blur: 8, spread: 0},
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{offset: 1, blur: 14, spread: 0}],
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[{offset: 3, blur: 5, spread: -1},
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{offset: 6, blur: 10, spread: 0},
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{offset: 1, blur: 18, spread: 0}],
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[{offset: 4, blur: 5, spread: -2},
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{offset: 7, blur: 10, spread: 1},
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{offset: 2, blur: 16, spread: 1}],
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[{offset: 5, blur: 5, spread: -3},
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{offset: 8, blur: 10, spread: 1},
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{offset: 3, blur: 14, spread: 2}],
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[{offset: 5, blur: 6, spread: -3},
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{offset: 9, blur: 12, spread: 1},
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{offset: 3, blur: 16, spread: 2}],
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[{offset: 6, blur: 6, spread: -3},
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{offset: 10, blur: 14, spread: 1},
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{offset: 4, blur: 18, spread: 3}],
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[{offset: 6, blur: 7, spread: -4},
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{offset: 11, blur: 15, spread: 1},
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{offset: 4, blur: 20, spread: 3}],
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[{offset: 7, blur: 8, spread: -4},
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{offset: 12, blur: 17, spread: 2},
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{offset: 5, blur: 22, spread: 4}],
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[{offset: 7, blur: 8, spread: -4},
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{offset: 13, blur: 19, spread: 2},
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{offset: 5, blur: 24, spread: 4}],
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[{offset: 7, blur: 9, spread: -4},
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{offset: 14, blur: 21, spread: 2},
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{offset: 5, blur: 26, spread: 4}],
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[{offset: 8, blur: 9, spread: -5},
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{offset: 15, blur: 22, spread: 2},
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{offset: 6, blur: 28, spread: 5}],
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[{offset: 8, blur: 10, spread: -5},
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{offset: 16, blur: 24, spread: 2},
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{offset: 6, blur: 30, spread: 5}],
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[{offset: 8, blur: 11, spread: -5},
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{offset: 17, blur: 26, spread: 2},
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{offset: 6, blur: 32, spread: 5}],
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[{offset: 9, blur: 11, spread: -5},
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{offset: 18, blur: 28, spread: 2},
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{offset: 7, blur: 34, spread: 6}],
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[{offset: 9, blur: 12, spread: -6},
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{offset: 19, blur: 29, spread: 2},
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{offset: 7, blur: 36, spread: 6}],
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[{offset: 10, blur: 13, spread: -6},
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{offset: 20, blur: 31, spread: 3},
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{offset: 8, blur: 38, spread: 7}],
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[{offset: 10, blur: 13, spread: -6},
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{offset: 21, blur: 33, spread: 3},
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{offset: 8, blur: 40, spread: 7}],
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[{offset: 10, blur: 14, spread: -6},
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{offset: 22, blur: 35, spread: 3},
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{offset: 8, blur: 42, spread: 7}],
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[{offset: 11, blur: 14, spread: -7},
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{offset: 23, blur: 36, spread: 3},
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{offset: 9, blur: 44, spread: 8}],
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[{offset: 11, blur: 15, spread: -7},
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{offset: 24, blur: 38, spread: 3},
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{offset: 9, blur: 46, spread: 8}]
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]
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readonly property var _shadowColors: [
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Qt.rgba(0,0,0, 0.2),
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Qt.rgba(0,0,0, 0.14),
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Qt.rgba(0,0,0, 0.12)
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]
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Repeater {
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model: _shadows[elevation]
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delegate: RectangularGlow {
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anchors {
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centerIn: parent
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verticalCenterOffset: modelData.offset
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}
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width: parent.width + 2 * modelData.spread
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height: parent.height + 2 * modelData.spread
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glowRadius: modelData.blur/2
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spread: 0.05
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color: _shadowColors[index]
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cornerRadius: modelData.blur + (effect.sourceItem.radius || 0)
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}
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}
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ShaderEffect {
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anchors.fill: parent
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property alias source: effect.source;
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}
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}
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