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Doc: update Accelbubble example

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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>
This commit is contained in:
Leena Miettinen
2014-04-08 12:28:47 +02:00
parent 95ddc795a5
commit 8bb50b1b1e
2 changed files with 6 additions and 0 deletions
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3
doc/examples/accelbubble/main.qml
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@@ -79,6 +79,9 @@ ApplicationWindow {
var newX = (bubble.x + calcRoll(accel.reading.x, accel.reading.y, accel.reading.z) * 0.1) 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) 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) if (newX < 0)
newX = 0 newX = 0

3
doc/src/qtquick/creator-mobile-app-tutorial.qdoc
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@@ -196,6 +196,9 @@
\skipto onReadingChanged \skipto onReadingChanged
\printuntil } \printuntil }
We want to ensure that the position of the bubble is always within
the bounds of the screen. If the Accelerometer returns not a number
(NaN), the value is ignored and the bubble position is not updated.
\li Add SmoothedAnimation behavior on the \a x and \a y properties of \li Add SmoothedAnimation behavior on the \a x and \a y properties of
the bubble to make its movement look smoother. the bubble to make its movement look smoother.