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Pad Navigator example: Remove duplicated property animations

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The example created two QPropertyAnimation instances that controlled
the same property; this caused a clash for some transitions.

Remove the smoothFlipXRotation and smoothFlipYRotation animations;
they are not needed as equivalent animations are already set as
defaults for the state machine.

Fixes: QTBUG-28081
Change-Id: Ifa7a09d48cd4905df720e3327914320ed74ebae6
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
This commit is contained in:
Topi Reinio 2020-01-09 12:25:54 +01:00
parent 9f1948f59b
commit e05511a364
2 changed files with 11 additions and 18 deletions
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21
examples/widgets/doc/src/padnavigator.qdoc
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@ -387,17 +387,12 @@
\snippet graphicsview/padnavigator/padnavigator.cpp 7
We now create the animations that control the flip-effect when you press
the enter key. The main goal is to rotate the pad by 180 degrees or back,
but we also need to make sure the selection item's tilt rotations are reset
back to 0 when the pad is flipped, and restored back to their original
values when flipped back:
the enter key. The main goal is to rotate the pad by 180 degrees or back.
\list
\li \c smoothFlipRotation: Animates the main 180 degree rotation of the pad.
\li \c smoothFlipScale: Scales the pad out and then in again while the pad is rotating.
\li \c smoothFlipXRotation: Animates the selection item's X-tilt to 0 and back.
\li \c smoothFlipYRotation: Animates the selection item's Y-tilt to 0 and back.
\li \c flipAnimation: A parallel animation group that ensures all the above animations are run in parallel.
\li \c flipAnimation: A parallel animation group that ensures the above animations are run in parallel.
\endlist
All animations are given a 500 millisecond duration and an
@ -447,11 +442,17 @@
Each state assigns specific properties to objects on entry. Most
interesting perhaps is the assignment of the value 0.0 to the pad's \c
flipRotation angle property when in \c frontState, and 180.0 when in \c
backState. At the end of this section we register default animations with
the state engine; these animations will apply to their respective objects
and properties for any state transition. Otherwise it's common to assign
backState.
At the end of this section we register default animations with the state
engine; these animations will apply to their respective objects and
properties for any state transition. Otherwise it's common to assign
animations to specific transitions.
Specifically, we use default animations to control the selection item's
movement and tilt rotations. The tilt rotations are set to 0 when the pad
is flipped, and restored back to their original values when flipped back.
The \c splashState state is set as the initial state. This is required
before we start the state engine. We proceed with creating some
transitions.

8
examples/widgets/graphicsview/padnavigator/padnavigator.cpp
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@ -142,24 +142,16 @@ PadNavigator::PadNavigator(const QSize &size, QWidget *parent)
// Flip animation setup
QPropertyAnimation *smoothFlipRotation = new QPropertyAnimation(flipRotation, "angle");
QPropertyAnimation *smoothFlipScale = new QPropertyAnimation(pad, "scale");
QPropertyAnimation *smoothFlipXRotation = new QPropertyAnimation(xRotation, "angle");
QPropertyAnimation *smoothFlipYRotation = new QPropertyAnimation(yRotation, "angle");
QParallelAnimationGroup *flipAnimation = new QParallelAnimationGroup(this);
smoothFlipScale->setDuration(500);
smoothFlipRotation->setDuration(500);
smoothFlipXRotation->setDuration(500);
smoothFlipYRotation->setDuration(500);
smoothFlipScale->setEasingCurve(QEasingCurve::InOutQuad);
smoothFlipRotation->setEasingCurve(QEasingCurve::InOutQuad);
smoothFlipXRotation->setEasingCurve(QEasingCurve::InOutQuad);
smoothFlipYRotation->setEasingCurve(QEasingCurve::InOutQuad);
smoothFlipScale->setKeyValueAt(0, qvariant_cast<qreal>(1.0));
smoothFlipScale->setKeyValueAt(0.5, qvariant_cast<qreal>(0.7));
smoothFlipScale->setKeyValueAt(1, qvariant_cast<qreal>(1.0));
flipAnimation->addAnimation(smoothFlipRotation);
flipAnimation->addAnimation(smoothFlipScale);
flipAnimation->addAnimation(smoothFlipXRotation);
flipAnimation->addAnimation(smoothFlipYRotation);
//! [7]
//! [8]