public TickerFuture reverse(float?from = null)
{
D.assert(() => {
if (duration == null && reverseDuration == null)
{
throw new UIWidgetsError(
"AnimationController.reverse() called with no default duration or reverseDuration.\n" +
"The \"duration\" or \"reverseDuration\" property should be set, either in the constructor or later, before " +
"calling the reverse() function."
);
}
return(true);
});
D.assert(
_ticker != null,
() => "AnimationController.reverse() called after AnimationController.dispose()\n" +
"AnimationController methods should not be used after calling dispose."
);
_direction = _AnimationDirection.reverse;
if (from != null)
{
setValue(from.Value);
}
return(_animateToInternal(lowerBound));
}
public TickerFuture animateTo(float target, TimeSpan?duration = null, Curve curve = null)
{
curve = curve ?? Curves.linear;
this._direction = _AnimationDirection.forward;
return(this._animateToInternal(target, duration: duration, curve: curve));
}
public TickerFuture forward(float?from = null)
{
D.assert(() => {
if (this.duration == null)
{
throw new UIWidgetsError(
"AnimationController.forward() called with no default Duration.\n" +
"The \"duration\" property should be set, either in the constructor or later, before " +
"calling the forward() function."
);
}
return(true);
});
D.assert(
this._ticker != null,
"AnimationController.forward() called after AnimationController.dispose()\n" +
"AnimationController methods should not be used after calling dispose."
);
this._direction = _AnimationDirection.forward;
if (from != null)
{
this.setValue(from.Value);
}
return(this._animateToInternal(this.upperBound));
}
public TickerFuture animateWith(Simulation simulation)
{
D.assert(
_ticker != null,
() => "AnimationController.animateWith() called after AnimationController.dispose()\n" +
"AnimationController methods should not be used after calling dispose."
);
stop();
_direction = _AnimationDirection.forward;
return(_startSimulation(simulation));
}
public TickerFuture animateBack(float target, TimeSpan?duration, Curve curve = null)
{
D.assert(
_ticker != null,
() => "AnimationController.animateBack() called after AnimationController.dispose()\n" +
"AnimationController methods should not be used after calling dispose."
);
curve = curve ?? Curves.linear;
_direction = _AnimationDirection.reverse;
return(_animateToInternal(target, duration, curve));
}
public TickerFuture fling(float velocity = 1.0f)
{
this._direction = velocity < 0.0 ? _AnimationDirection.reverse : _AnimationDirection.forward;
float target = velocity < 0.0f
? this.lowerBound - _kFlingTolerance.distance
: this.upperBound + _kFlingTolerance.distance;
Simulation simulation = new SpringSimulation(_kFlingSpringDescription, this.value,
target, velocity);
simulation.tolerance = _kFlingTolerance;
return(this.animateWith(simulation));
}
public TickerFuture animateTo(float target, TimeSpan?duration = null, Curve curve = null)
{
D.assert(
this._ticker != null,
"AnimationController.animateTo() called after AnimationController.dispose()\n" +
"AnimationController methods should not be used after calling dispose."
);
curve = curve ?? Curves.linear;
this._direction = _AnimationDirection.forward;
return(this._animateToInternal(target, duration: duration, curve: curve));
}
public TickerFuture fling(float velocity = 1.0f)
{
_direction = velocity < 0.0 ? _AnimationDirection.reverse : _AnimationDirection.forward;
float target = velocity < 0.0f
? lowerBound - _kFlingTolerance.distance
: upperBound + _kFlingTolerance.distance;
Simulation simulation = new SpringSimulation(_kFlingSpringDescription, value,
target, velocity);
simulation.tolerance = _kFlingTolerance;
stop();
return(_startSimulation(simulation));
}
public TickerFuture reverse(float?from = null)
{
D.assert(() => {
if (this.duration == null)
{
throw new UIWidgetsError(
"AnimationController.reverse() called with no default Duration.\n" +
"The \"duration\" property should be set, either in the constructor or later, before " +
"calling the reverse() function."
);
}
return(true);
});
this._direction = _AnimationDirection.reverse;
if (from != null)
{
this.setValue(from.Value);
}
return(this._animateToInternal(this.lowerBound));
}
void _directionSetter(_AnimationDirection direction)
{
_direction = direction;
_status = (_direction == _AnimationDirection.forward) ? AnimationStatus.forward : AnimationStatus.reverse;
_checkStatusChanged();
}
