The QAnimationGroup class is an abstract base class for groups of animations. More...
| Header: | #include <QAnimationGroup> |
| qmake: | QT += core |
| Since: | Qt 4.6 |
| Inherits: | QAbstractAnimation |
| Inherited By: |
| QAnimationGroup(QObject *parent = nullptr) | |
| virtual | ~QAnimationGroup() |
| void | addAnimation(QAbstractAnimation *animation) |
| QAbstractAnimation * | animationAt(int index) const |
| int | animationCount() const |
| void | clear() |
| int | indexOfAnimation(QAbstractAnimation *animation) const |
| void | insertAnimation(int index, QAbstractAnimation *animation) |
| void | removeAnimation(QAbstractAnimation *animation) |
| QAbstractAnimation * | takeAnimation(int index) |
| virtual bool | event(QEvent *event) override |
The QAnimationGroup class is an abstract base class for groups of animations.
An animation group is a container for animations (subclasses of QAbstractAnimation). A group is usually responsible for managing the state of its animations, i.e., it decides when to start, stop, resume, and pause them. Currently, Qt provides two such groups: QParallelAnimationGroup and QSequentialAnimationGroup. Look up their class descriptions for details.
Since QAnimationGroup inherits from QAbstractAnimation, you can combine groups, and easily construct complex animation graphs. You can query QAbstractAnimation for the group it belongs to (using the group() function).
To start a top-level animation group, you simply use the start() function from QAbstractAnimation. By a top-level animation group, we think of a group that itself is not contained within another group. Starting sub groups directly is not supported, and may lead to unexpected behavior.
QAnimationGroup provides methods for adding and retrieving animations. Besides that, you can remove animations by calling removeAnimation(), and clear the animation group by calling clear(). You may keep track of changes in the group's animations by listening to QEvent::ChildAdded and QEvent::ChildRemoved events.
QAnimationGroup takes ownership of the animations it manages, and ensures that they are deleted when the animation group is deleted.
See also QAbstractAnimation, QVariantAnimation, and The Animation Framework.
Constructs a QAnimationGroup. parent is passed to QObject's constructor.
[virtual] QAnimationGroup::~QAnimationGroup()Destroys the animation group. It will also destroy all its animations.
Adds animation to this group. This will call insertAnimation with index equals to animationCount().
Note: The group takes ownership of the animation.
See also removeAnimation().
Returns a pointer to the animation at index in this group. This function is useful when you need access to a particular animation. index is between 0 and animationCount() - 1.
See also animationCount() and indexOfAnimation().
Returns the number of animations managed by this group.
See also indexOfAnimation(), addAnimation(), and animationAt().
Removes and deletes all animations in this animation group, and resets the current time to 0.
See also addAnimation() and removeAnimation().
[override virtual protected] bool QAnimationGroup::event(QEvent *event)Reimplemented from QAbstractAnimation::event().
Returns the index of animation. The returned index can be passed to the other functions that take an index as an argument.
See also insertAnimation(), animationAt(), and takeAnimation().
Inserts animation into this animation group at index. If index is 0 the animation is inserted at the beginning. If index is animationCount(), the animation is inserted at the end.
Note: The group takes ownership of the animation.
See also takeAnimation(), addAnimation(), indexOfAnimation(), and removeAnimation().
Removes animation from this group. The ownership of animation is transferred to the caller.
See also takeAnimation(), insertAnimation(), and addAnimation().
Returns the animation at index and removes it from the animation group.
Note: The ownership of the animation is transferred to the caller.
See also removeAnimation(), addAnimation(), insertAnimation(), and indexOfAnimation().
