Spectral/qml/component/ElevationEffect.qml

146 lines
4.3 KiB
QML

import QtQuick 2.9
import QtGraphicalEffects 1.0
/*!
An effect for standard Material Design elevation shadows
*/
Item {
id: effect
property variant source
property int elevation: 0
// Shadow details follow Material Design (taken from Angular Material)
readonly property var _shadows: [
[{offset: 0, blur: 0, spread: 0},
{offset: 0, blur: 0, spread: 0},
{offset: 0, blur: 0, spread: 0}],
[{offset: 1, blur: 3, spread: 0},
{offset: 1, blur: 1, spread: 0},
{offset: 2, blur: 1, spread: -1}],
[{offset: 1, blur: 5, spread: 0},
{offset: 2, blur: 2, spread: 0},
{offset: 3, blur: 1, spread: -2}],
[{offset: 1, blur: 8, spread: 0},
{offset: 3, blur: 4, spread: 0},
{offset: 3, blur: 3, spread: -2}],
[{offset: 2, blur: 4, spread: -1},
{offset: 4, blur: 5, spread: 0},
{offset: 1, blur: 10, spread: 0}],
[{offset: 3, blur: 5, spread: -1},
{offset: 5, blur: 8, spread: 0},
{offset: 1, blur: 14, spread: 0}],
[{offset: 3, blur: 5, spread: -1},
{offset: 6, blur: 10, spread: 0},
{offset: 1, blur: 18, spread: 0}],
[{offset: 4, blur: 5, spread: -2},
{offset: 7, blur: 10, spread: 1},
{offset: 2, blur: 16, spread: 1}],
[{offset: 5, blur: 5, spread: -3},
{offset: 8, blur: 10, spread: 1},
{offset: 3, blur: 14, spread: 2}],
[{offset: 5, blur: 6, spread: -3},
{offset: 9, blur: 12, spread: 1},
{offset: 3, blur: 16, spread: 2}],
[{offset: 6, blur: 6, spread: -3},
{offset: 10, blur: 14, spread: 1},
{offset: 4, blur: 18, spread: 3}],
[{offset: 6, blur: 7, spread: -4},
{offset: 11, blur: 15, spread: 1},
{offset: 4, blur: 20, spread: 3}],
[{offset: 7, blur: 8, spread: -4},
{offset: 12, blur: 17, spread: 2},
{offset: 5, blur: 22, spread: 4}],
[{offset: 7, blur: 8, spread: -4},
{offset: 13, blur: 19, spread: 2},
{offset: 5, blur: 24, spread: 4}],
[{offset: 7, blur: 9, spread: -4},
{offset: 14, blur: 21, spread: 2},
{offset: 5, blur: 26, spread: 4}],
[{offset: 8, blur: 9, spread: -5},
{offset: 15, blur: 22, spread: 2},
{offset: 6, blur: 28, spread: 5}],
[{offset: 8, blur: 10, spread: -5},
{offset: 16, blur: 24, spread: 2},
{offset: 6, blur: 30, spread: 5}],
[{offset: 8, blur: 11, spread: -5},
{offset: 17, blur: 26, spread: 2},
{offset: 6, blur: 32, spread: 5}],
[{offset: 9, blur: 11, spread: -5},
{offset: 18, blur: 28, spread: 2},
{offset: 7, blur: 34, spread: 6}],
[{offset: 9, blur: 12, spread: -6},
{offset: 19, blur: 29, spread: 2},
{offset: 7, blur: 36, spread: 6}],
[{offset: 10, blur: 13, spread: -6},
{offset: 20, blur: 31, spread: 3},
{offset: 8, blur: 38, spread: 7}],
[{offset: 10, blur: 13, spread: -6},
{offset: 21, blur: 33, spread: 3},
{offset: 8, blur: 40, spread: 7}],
[{offset: 10, blur: 14, spread: -6},
{offset: 22, blur: 35, spread: 3},
{offset: 8, blur: 42, spread: 7}],
[{offset: 11, blur: 14, spread: -7},
{offset: 23, blur: 36, spread: 3},
{offset: 9, blur: 44, spread: 8}],
[{offset: 11, blur: 15, spread: -7},
{offset: 24, blur: 38, spread: 3},
{offset: 9, blur: 46, spread: 8}]
]
readonly property var _shadowColors: [
Qt.rgba(0,0,0, 0.2),
Qt.rgba(0,0,0, 0.14),
Qt.rgba(0,0,0, 0.12)
]
Repeater {
model: _shadows[elevation]
delegate: RectangularGlow {
anchors {
centerIn: parent
verticalCenterOffset: modelData.offset
}
width: parent.width + 2 * modelData.spread
height: parent.height + 2 * modelData.spread
glowRadius: modelData.blur/2
spread: 0.05
color: _shadowColors[index]
cornerRadius: modelData.blur + (effect.source.radius || 0)
}
}
ShaderEffect {
anchors.fill: parent
property alias source: effect.source;
}
}