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import QtQuick 2.0
import QtQuick.Window 2.2
import UM 1.3 as UM
// This is an QML item that shows the FPS and a running average of the FPS.
Item
{
id: base
property alias backgroundColor: background.color
property alias textColor: fpsText.color
property int numMeasurementsToAverage: 3
width: fpsText.contentWidth + UM.Theme.getSize("default_margin").height
height: fpsText.contentHeight + UM.Theme.getSize("default_margin").height
Rectangle
{
id: background
// We use a trick here to figure out how often we can get a redraw triggered.
// By adding a rotating rectangle, we can increase a counter by one every time we get notified.
// After that, we trigger a timer once every second to look at that number.
property int frameCounter: 0
property int averageFrameCounter: 0
property int counter: 0
property int fps: 0
property real averageFps: 0.0
color: UM.Theme.getColor("primary")
width: parent.width
height: parent.height
Rectangle
{
width: 0
height: 0
NumberAnimation on rotation
{
from: 0
to: 360
duration: 1000
loops: Animation.Infinite
}
onRotationChanged: parent.frameCounter++;
visible: false
}
Text
{
id: fpsText
anchors.fill:parent
verticalAlignment: Text.AlignVCenter
horizontalAlignment: Text.AlignHCenter
color: UM.Theme.getColor("text")
font: UM.Theme.getFont("default")
text: "Ø " + parent.averageFps + " | " + parent.fps + " fps"
}
Timer
{
interval: 1000
repeat: true
running: true
onTriggered:
{
parent.averageFrameCounter += parent.frameCounter;
parent.fps = parent.frameCounter;
parent.counter++;
parent.frameCounter = 0;
if (parent.counter >= base.numMeasurementsToAverage)
{
parent.averageFps = (parent.averageFrameCounter / parent.counter).toFixed(2)
parent.averageFrameCounter = 0;
parent.counter = 0;
}
}
}
}
}
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