Lomiri
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BackgroundBlur.qml
1/*
2 * Copyright (C) 2016 Canonical, Ltd.
3 * Copyright (C) 2022 UBports Foundation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 3.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18import QtQuick 2.12
19import QtGraphicalEffects 1.0
20import Lomiri.Components 1.3
21
22Item {
23 id: root
24
25 property Item sourceItem
26 property rect blurRect: Qt.rect(0,0,0,0)
27 property bool occluding: false
28
29 readonly property int minRadius : Math.max(units.gu(4), 64)
30 readonly property int blurRadius : Math.min(minRadius, 128)
31
32 ShaderEffectSource {
33 id: shaderEffectSource
34 sourceItem: root.sourceItem
35 hideSource: root.occluding
36 sourceRect: root.blurRect
37 live: false
38 enabled: sourceItem != null
39 }
40
41 FastBlur {
42 id: fastBlur
43 anchors.fill: parent
44 source: shaderEffectSource
45 radius: root.blurRadius
46 cached: false
47 visible: sourceItem != null
48 enabled: visible
49 }
50
51 Timer {
52 interval: 48
53 repeat: root.visible && (sourceItem != null)
54 running: repeat
55 onTriggered: shaderEffectSource.scheduleUpdate()
56 }
57
58 // When blur is disabled
59 Rectangle {
60 anchors.fill: parent
61 color: theme.palette.highlighted.background
62 visible: sourceItem == null
63 }
64}