// ReSharper disable VirtualMemberNeverOverriden.Global
protected virtual void OnStateChanged(ProgressState oldState, ProgressState newState)
// ReSharper restore VirtualMemberNeverOverriden.Global
{
var peer = UIElementAutomationPeer.FromElement(this) as ProgressAutomationPeer;
if (peer != null)
{
peer.InvalidatePeer();
}
if (IsEnabled)
{
switch (newState)
{
case ProgressState.Busy:
VisualStateManager.GoToState(this, "Busy", true);
if (IndeterminateAnimation != null && IsIndeterminateAnimationRunning)
{
IsIndeterminateAnimationRunning = false;
IndeterminateAnimation.Stop(this);
}
if (BusyAnimation != null)
{
BusyAnimation.Begin(this, Template, true);
IsBusyAnimationRunning = true;
}
break;
case ProgressState.Indeterminate:
VisualStateManager.GoToState(this, "Indeterminate", true);
if (BusyAnimation != null && IsBusyAnimationRunning)
{
IsBusyAnimationRunning = false;
BusyAnimation.Stop(this);
}
if (IndeterminateAnimation != null)
{
IndeterminateAnimation.Begin(this, Template, true);
IsIndeterminateAnimationRunning = true;
}
break;
case ProgressState.Normal:
VisualStateManager.GoToState(this, "Normal", true);
if (IndeterminateAnimation != null && IsIndeterminateAnimationRunning)
{
IsIndeterminateAnimationRunning = false;
IndeterminateAnimation.Stop(this);
}
if (BusyAnimation != null && IsBusyAnimationRunning)
{
IsBusyAnimationRunning = false;
BusyAnimation.Stop(this);
}
break;
}
}
}
private void UpdateIndeterminateAnimation()
{
if ((IndeterminateAnimation == null || (IndeterminateAnimation != null && IndeterminateAnimation.Name == DefaultIndeterminateAnimationName)) && Track != null && _indicator != null)
{
if (IndeterminateAnimation != null && IsIndeterminateAnimationRunning)
{
IsIndeterminateAnimationRunning = false;
IndeterminateAnimation.Stop(this);
IndeterminateAnimation.Remove(this);
}
IndeterminateAnimation = new Storyboard {
Name = DefaultIndeterminateAnimationName, RepeatBehavior = RepeatBehavior.Forever
};
var indicatorSize = Orientation == Orientation.Horizontal ? _indicator.Width : _indicator.Height;
var trackSize = Orientation == Orientation.Horizontal ? Track.ActualWidth : Track.ActualHeight;
var time = trackSize / 100;
var animation = new DoubleAnimationUsingKeyFrames {
Duration = new Duration(TimeSpan.FromSeconds(time + 0.5))
};
// NOTE: Lack of contracts: DoubleAnimationUsingKeyFrames.KeyFrames is always have collection instance
Contract.Assume(animation.KeyFrames != null);
animation.KeyFrames.Add(new DiscreteDoubleKeyFrame(-indicatorSize - 1, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0))));
animation.KeyFrames.Add(new LinearDoubleKeyFrame(trackSize + 1, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(time))));
Storyboard.SetTarget(animation, _indicator);
Storyboard.SetTargetProperty(animation,
new PropertyPath(Orientation == Orientation.Horizontal ? Canvas.LeftProperty : Canvas.TopProperty));
// NOTE: Lack of contracts
Contract.Assume(IndeterminateAnimation != null);
Contract.Assume(IndeterminateAnimation.Children != null);
IndeterminateAnimation.Children.Add(animation);
if (IndeterminateAnimation.CanFreeze)
{
IndeterminateAnimation.Freeze();
}
if (State == ProgressState.Indeterminate && IsEnabled)
{
IndeterminateAnimation.Begin(this, Template, true);
IsIndeterminateAnimationRunning = true;
}
}
}
private void UpdateIndeterminateAnimation()
{
if ((IndeterminateAnimation == null || (IndeterminateAnimation != null && IndeterminateAnimation.Name == DefaultIndeterminateAnimationName)) && Track != null && _arc != null)
{
if (IndeterminateAnimation != null && IsIndeterminateAnimationRunning)
{
IsIndeterminateAnimationRunning = false;
IndeterminateAnimation.Stop(this);
IndeterminateAnimation.Remove(this);
}
IndeterminateAnimation = new Storyboard {
Name = DefaultIndeterminateAnimationName, RepeatBehavior = RepeatBehavior.Forever
};
var trackSize = Math.Min(Track.ActualWidth, Track.ActualHeight);
var time = (trackSize * Math.PI) / 100;
var startAngleSetValueAnimation = new DoubleAnimation(0, new Duration(TimeSpan.FromSeconds(0d)));
Storyboard.SetTarget(startAngleSetValueAnimation, _arc);
Storyboard.SetTargetProperty(startAngleSetValueAnimation, new PropertyPath(Arc.StartAngleProperty));
var endAngleSetValueAnimation = new DoubleAnimation(-270, new Duration(TimeSpan.FromSeconds(0d)));
Storyboard.SetTarget(endAngleSetValueAnimation, _arc);
Storyboard.SetTargetProperty(endAngleSetValueAnimation, new PropertyPath(Arc.EndAngleProperty));
var startAngleAnimation = new DoubleAnimationUsingKeyFrames();
// NOTE: Lack of contracts: DoubleAnimationUsingKeyFrames.KeyFrames is always have collection instance
Contract.Assume(startAngleAnimation.KeyFrames != null);
startAngleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame(360, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(time))));
Storyboard.SetTarget(startAngleAnimation, _arc);
Storyboard.SetTargetProperty(startAngleAnimation, new PropertyPath(Arc.StartAngleProperty));
var endAngleAnimation = new DoubleAnimationUsingKeyFrames();
// NOTE: Lack of contracts: DoubleAnimationUsingKeyFrames.KeyFrames is always have collection instance
Contract.Assume(endAngleAnimation.KeyFrames != null);
endAngleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame(90, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(time))));
Storyboard.SetTarget(endAngleAnimation, _arc);
Storyboard.SetTargetProperty(endAngleAnimation, new PropertyPath(Arc.EndAngleProperty));
// NOTE: Lack of contracts
Contract.Assume(IndeterminateAnimation != null);
Contract.Assume(IndeterminateAnimation.Children != null);
IndeterminateAnimation.Children.Add(startAngleSetValueAnimation);
IndeterminateAnimation.Children.Add(endAngleSetValueAnimation);
IndeterminateAnimation.Children.Add(startAngleAnimation);
IndeterminateAnimation.Children.Add(endAngleAnimation);
if (IndeterminateAnimation.CanFreeze)
{
IndeterminateAnimation.Freeze();
}
if (State == ProgressState.Indeterminate && IsEnabled)
{
IndeterminateAnimation.Begin(this, Template, true);
IsIndeterminateAnimationRunning = true;
}
}
}
