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<td >Qt 5.9</td><td ><a href="qtsensors-index.html">Qt Sensors</a></td><td ><a href="qtsensors-examples.html">Qt Sensors Examples</a></td><td >Qt Sensors - Accel Bubble</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#overview">Overview</a></li>
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<h1 class="title">Qt Sensors - Accel Bubble</h1>
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<h2 id="overview">Overview</h2>
<p>Writing a QML application that uses the Accelerometer QML sensors type requires the following steps:</p>
<p>Import the Sensors Declarative module.</p>
<pre class="qml">
import QtSensors 5.0
</pre>
<p>Add an Accelerometer QML type.</p>
<pre class="qml">
<span class="type"><a href="qml-qtsensors-accelerometer.html">Accelerometer</a></span> {
<span class="name">id</span>: <span class="name">accel</span>
<span class="name">dataRate</span>: <span class="number">100</span>
</pre>
<p>Use the 'active' property to start the sensor</p>
<pre class="qml">
<span class="name">active</span>:<span class="number">true</span>
</pre>
<p>Move the bubble according to a factor of the accelerator sensor</p>
<pre class="qml">
<span class="name">onReadingChanged</span>: {
var <span class="name">newX</span> = (<span class="name">bubble</span>.<span class="name">x</span> <span class="operator">+</span> <span class="name">calcRoll</span>(<span class="name">accel</span>.<span class="name">reading</span>.<span class="name">x</span>, <span class="name">accel</span>.<span class="name">reading</span>.<span class="name">y</span>, <span class="name">accel</span>.<span class="name">reading</span>.<span class="name">z</span>) <span class="operator">*</span> <span class="number">.1</span>)
var <span class="name">newY</span> = (<span class="name">bubble</span>.<span class="name">y</span> <span class="operator">-</span> <span class="name">calcPitch</span>(<span class="name">accel</span>.<span class="name">reading</span>.<span class="name">x</span>, <span class="name">accel</span>.<span class="name">reading</span>.<span class="name">y</span>, <span class="name">accel</span>.<span class="name">reading</span>.<span class="name">z</span>) <span class="operator">*</span> <span class="number">.1</span>)
<span class="keyword">if</span> (<span class="name">isNaN</span>(<span class="name">newX</span>) <span class="operator">||</span> <span class="name">isNaN</span>(<span class="name">newY</span>))
<span class="keyword">return</span>;
<span class="keyword">if</span> (<span class="name">newX</span> <span class="operator"><</span> <span class="number">0</span>)
<span class="name">newX</span> <span class="operator">=</span> <span class="number">0</span>
<span class="keyword">if</span> (<span class="name">newX</span> <span class="operator">></span> <span class="name">mainWindow</span>.<span class="name">width</span> <span class="operator">-</span> <span class="name">bubble</span>.<span class="name">width</span>)
<span class="name">newX</span> <span class="operator">=</span> <span class="name">mainWindow</span>.<span class="name">width</span> <span class="operator">-</span> <span class="name">bubble</span>.<span class="name">width</span>
<span class="keyword">if</span> (<span class="name">newY</span> <span class="operator"><</span> <span class="number">18</span>)
<span class="name">newY</span> <span class="operator">=</span> <span class="number">18</span>
<span class="keyword">if</span> (<span class="name">newY</span> <span class="operator">></span> <span class="name">mainWindow</span>.<span class="name">height</span> <span class="operator">-</span> <span class="name">bubble</span>.<span class="name">height</span>)
<span class="name">newY</span> <span class="operator">=</span> <span class="name">mainWindow</span>.<span class="name">height</span> <span class="operator">-</span> <span class="name">bubble</span>.<span class="name">height</span>
<span class="name">bubble</span>.<span class="name">x</span> <span class="operator">=</span> <span class="name">newX</span>
<span class="name">bubble</span>.<span class="name">y</span> <span class="operator">=</span> <span class="name">newY</span>
}
</pre>
<p>Files:</p>
<ul>
<li><a href="qtsensors-accelbubble-accelbubble-qml.html">accelbubble/accelbubble.qml</a></li>
<li><a href="qtsensors-accelbubble-android-androidmanifest-xml.html">accelbubble/android/AndroidManifest.xml</a></li>
<li><a href="qtsensors-accelbubble-content-bluebubble-svg.html">accelbubble/content/Bluebubble.svg</a></li>
<li><a href="qtsensors-accelbubble-main-cpp.html">accelbubble/main.cpp</a></li>
<li><a href="qtsensors-accelbubble-accelbubble-pro.html">accelbubble/accelbubble.pro</a></li>
<li><a href="qtsensors-accelbubble-accelbubble-qrc.html">accelbubble/accelbubble.qrc</a></li>
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