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Bug
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Resolution: Fixed
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P2: Important
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5.5.1, 5.6.2, 5.9.0
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Qt 5.5.1, MSVC 2013 64-bit, Windows 10 64-bit
Qt 5.5.1, GCC 4.9, Android 6.0
Qt 5.6.2, MinGW 4.9.2 32-bit, Windows 10 64-bit
Documentation does not mention dynamic creation of Emitter objects so I assume this behavior is a bug.
Here is example code that reproduces the problem - pressing anywhere will cause an Emitter to be created. In my environment several first clicks cause flickering (about 20) and then there is no flickering at all.
import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Particles 2.0
Window {
visible: true
width: 640
height: 480
Rectangle {
id: particle
width: 30
height: width
radius: width / 2
color: "white"
visible: false
Component.onCompleted: {
particle.grabToImage(function(result) {
particleImage.source = result.url;
})
}
}
Rectangle {
anchors.fill: parent
color: "black"
ParticleSystem {
id: particleSystem
anchors.fill: parent
ImageParticle {
id: particleImage
width: 30; height: 30
}
}
}
MultiPointTouchArea {
anchors.fill: parent
onPressed: {
for (var i = 0 ; i < touchPoints.length ; i++)
emitterComponent.incubateObject(
particleSystem, {
x: touchPoints[i].x,
y: touchPoints[i].y
})
}
}
Component {
id: emitterComponent
Emitter {
emitRate: 10
velocity: PointDirection {x: 0; y: 0; xVariation: 200; yVariation: 200;}
size: 30
Timer {
running: true
interval: 1000
onTriggered: {
parent.destroy()
}
}
}
}
}