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using System;
using System.Windows;
using System.Windows.Media.Animation;
namespace DanielVaughan.Wpf
{
/* Sourced from http://www.codeproject.com/KB/WPF/GridLengthAnimation.aspx */
public class GridLengthAnimation : AnimationTimeline
{
static GridLengthAnimation()
{
FromProperty = DependencyProperty.Register("From", typeof(GridLength), typeof(GridLengthAnimation));
ToProperty = DependencyProperty.Register("To", typeof(GridLength), typeof(GridLengthAnimation));
}
public override Type TargetPropertyType
{
get
{
return typeof(GridLength);
}
}
protected override Freezable CreateInstanceCore()
{
return new GridLengthAnimation();
}
public static readonly DependencyProperty FromProperty;
public GridLength From
{
get
{
return (GridLength)GetValue(FromProperty);
}
set
{
SetValue(FromProperty, value);
}
}
public static readonly DependencyProperty ToProperty;
public GridLength To
{
get
{
return (GridLength)GetValue(ToProperty);
}
set
{
SetValue(ToProperty, value);
}
}
public override object GetCurrentValue(
object defaultOriginValue, object defaultDestinationValue, AnimationClock animationClock)
{
double fromVal = ((GridLength)GetValue(FromProperty)).Value;
double toVal = ((GridLength)GetValue(ToProperty)).Value;
if (fromVal > toVal)
{
return new GridLength((1 - animationClock.CurrentProgress.Value) * (fromVal - toVal) + toVal, GridUnitType.Star);
}
return new GridLength(animationClock.CurrentProgress.Value * (toVal - fromVal) + fromVal, GridUnitType.Star);
}
}
}
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Daniel is a former senior engineer in Technology and Research at the Office of the CTO at Microsoft, working on next generation systems.
Previously Daniel was a nine-time Microsoft MVP and co-founder of
Outcoder, a Swiss software and consulting company.
Daniel is the author of Windows Phone 8 Unleashed and Windows Phone 7.5 Unleashed, both published by SAMS.
Daniel is the developer behind several acclaimed mobile apps including
Surfy Browser for Android and Windows Phone. Daniel is the creator of a number of popular open-source projects, most notably
Codon.
Would you like Daniel to bring value to your organisation?
Please contact
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