Files
qt-creator/doc/examples/accelbubble/main.qml
Leena Miettinen 8bb50b1b1e Doc: update Accelbubble example
The app could not recover from receiving a NaN value from
the Accelerometer, so NaN values are ignored.

Change-Id: Ia33d800f7fe080e07dcf327c26b3772e994793bf
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
2014-04-24 14:02:06 +02:00

119 lines
3.9 KiB
QML

/**************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator
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**
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** distribution.
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import QtQuick 2.2
import QtQuick.Controls 1.1
import QtSensors 5.0
ApplicationWindow {
title: qsTr("Accelerate Bubble")
id: mainWindow
width: 640
height: 480
visible: true
Image {
id: bubble
source: "Bluebubble.svg"
smooth: true
property real centerX: mainWindow.width / 2
property real centerY: mainWindow.height / 2
property real bubbleCenter: bubble.width / 2
x: centerX - bubbleCenter
y: centerY - bubbleCenter
Behavior on y {
SmoothedAnimation {
easing.type: Easing.Linear
duration: 100
}
}
Behavior on x {
SmoothedAnimation {
easing.type: Easing.Linear
duration: 100
}
}
}
Accelerometer {
id: accel
dataRate: 100
active:true
onReadingChanged: {
var newX = (bubble.x + calcRoll(accel.reading.x, accel.reading.y, accel.reading.z) * 0.1)
var newY = (bubble.y - calcPitch(accel.reading.x, accel.reading.y, accel.reading.z) * 0.1)
if (isNaN(newX) || isNaN(newY))
return;
if (newX < 0)
newX = 0
if (newX > mainWindow.width - bubble.width)
newX = mainWindow.width - bubble.width
if (newY < 18)
newY = 18
if (newY > mainWindow.height - bubble.height)
newY = mainWindow.height - bubble.height
bubble.x = newX
bubble.y = newY
}
}
function calcPitch(x, y, z) {
return -(Math.atan(y / Math.sqrt(x * x + z * z)) * 57.2957795);
}
function calcRoll(x, y, z) {
return -(Math.atan(x / Math.sqrt(y * y + z * z)) * 57.2957795);
}
menuBar: MenuBar {
Menu {
title: qsTr("File")
MenuItem {
text: qsTr("Exit")
onTriggered: Qt.quit();
}
}
}
}