internal void UnApply(BindableObject target, bool fromStyle = false)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (Property == null)
{
return;
}
object actual = target.GetValue(Property);
if (!Equals(actual, Value) && !(Value is Binding) && !(Value is DynamicResource))
{
//Do not reset default value if the value has been changed
_originalValues.Remove(target);
return;
}
object defaultValue;
if (_originalValues.TryGetValue(target, out defaultValue))
{
//reset default value, unapply bindings and dynamicResource
target.SetValue(Property, defaultValue, fromStyle);
_originalValues.Remove(target);
}
else
{
target.ClearValue(Property);
}
}
static void OnTransformChanged(BindableObject bindable, object oldValue, object newValue)
{
if ((string)newValue == "none")
{
bindable.ClearValue(TranslationXProperty);
bindable.ClearValue(TranslationYProperty);
bindable.ClearValue(RotationProperty);
bindable.ClearValue(RotationXProperty);
bindable.ClearValue(RotationYProperty);
bindable.ClearValue(ScaleProperty);
bindable.ClearValue(ScaleXProperty);
bindable.ClearValue(ScaleYProperty);
return;
}
var transforms = ((string)newValue).Split(' ');
foreach (var transform in transforms)
{
if (string.IsNullOrEmpty(transform) || transform.IndexOf('(') < 0 || transform.IndexOf(')') < 0)
{
throw new FormatException("Format for transform is 'none | transform(value) [transform(value) ]*'");
}
var transformName = transform.Substring(0, transform.IndexOf('('));
var value = transform.Substring(transform.IndexOf('(') + 1, transform.IndexOf(')') - transform.IndexOf('(') - 1);
double translationX, translationY, scaleX, scaleY, rotateX, rotateY, rotate;
if (transformName.StartsWith("translateX", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out translationX))
{
bindable.SetValue(TranslationXProperty, translationX);
}
else if (transformName.StartsWith("translateY", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out translationY))
{
bindable.SetValue(TranslationYProperty, translationY);
}
else if (transformName.StartsWith("translate", StringComparison.OrdinalIgnoreCase))
{
var translate = value.Split(',');
if (double.TryParse(translate[0], out translationX) && double.TryParse(translate[1], out translationY))
{
bindable.SetValue(TranslationXProperty, translationX);
bindable.SetValue(TranslationYProperty, translationY);
}
}
else if (transformName.StartsWith("scaleX", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out scaleX))
{
bindable.SetValue(ScaleXProperty, scaleX);
}
else if (transformName.StartsWith("scaleY", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out scaleY))
{
bindable.SetValue(ScaleYProperty, scaleY);
}
else if (transformName.StartsWith("scale", StringComparison.OrdinalIgnoreCase))
{
var scale = value.Split(',');
if (double.TryParse(scale[0], out scaleX) && double.TryParse(scale[1], out scaleY))
{
bindable.SetValue(ScaleXProperty, scaleX);
bindable.SetValue(ScaleYProperty, scaleY);
}
}
else if (transformName.StartsWith("rotateX", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out rotateX))
{
bindable.SetValue(RotationXProperty, rotateX);
}
else if (transformName.StartsWith("rotateY", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out rotateY))
{
bindable.SetValue(RotationYProperty, rotateY);
}
else if (transformName.StartsWith("rotate", StringComparison.OrdinalIgnoreCase) && double.TryParse(value, out rotate))
{
bindable.SetValue(RotationProperty, rotate);
}
else
{
throw new FormatException("Invalid transform name");
}
}
}
internal override void TearDown(BindableObject bindable)
{
bindable.RemoveBinding(_boundProperty);
bindable.ClearValue(_boundProperty);
}
internal override void TearDown(BindableObject bindable)
{
bindable.ClearValue(_stateProperty);
bindable.PropertyChanged -= OnAttachedObjectPropertyChanged;
}
