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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import QtQuick
import QtQuick.Particles
pragma ComponentBehavior: Bound
Rectangle {
id: root
color: "black"
width: 640
height: 480
ParticleSystem {
id: sys
}
ImageParticle {
system: sys
source: "qrc:///particleresources/glowdot.png"
color: "white"
colorVariation: 1.0
alpha: 0.1
entryEffect: ImageParticle.None
}
Emitter {
id: emitter
system: sys
width: parent.width/2
velocity: PointDirection {y: 72; yVariation: 24}
lifeSpan: 10000
emitRate: 1000
enabled: false
size: 32
}
//! [fake]
Item {
id: fakeEmitter
function burst(number) {
while (number > 0) {
let item = fakeParticle.createObject(root)
item.lifeSpan = Math.random() * 5000 + 5000
item.x = Math.random() * (root.width / 2) + (root.width / 2)
item.y = 0
number--
}
}
Component {
id: fakeParticle
Image {
id: container
property int lifeSpan: 10000
width: 32
height: 32
source: "qrc:///particleresources/glowdot.png"
PropertyAnimation on y { from: -16; to: root.height - 16; duration: container.lifeSpan; running: true }
SequentialAnimation on opacity {
running: true
NumberAnimation { from: 0; to: 1; duration: 500 }
PauseAnimation { duration: container.lifeSpan - 1000 }
NumberAnimation { from: 1; to: 0; duration: 500 }
ScriptAction { script: container.destroy(); }
}
}
}
}
//! [fake]
//Hooked to a timer, but click for extra bursts that really stress performance
Timer {
interval: 10000
triggeredOnStart: true
repeat: true
running: true
onTriggered: {
emitter.burst(1000);
fakeEmitter.burst(1000);
}
}
Text {
anchors.left: parent.left
anchors.bottom: parent.bottom
text: qsTr("1000 particles")
color: "white"
MouseArea {
anchors.fill: parent
onClicked: emitter.burst(1000);
}
}
Text {
anchors.right: parent.right
anchors.bottom: parent.bottom
text: qsTr("1000 items")
color: "white"
MouseArea {
anchors.fill: parent
onClicked: fakeEmitter.burst(1000);
}
}
}
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