| public static TryConvert ( object value, DateTime &dateTimeValue ) : bool | ||
| value | object | The value to convert. |
| dateTimeValue | DateTime | The double value. |
| Résultat | bool | |
/// <summary>
/// Called when the ActualIndependentValue property changes.
/// </summary>
/// <param name="oldValue">The value to be replaced.</param>
/// <param name="newValue">The new value.</param>
protected virtual void OnActualIndependentValuePropertyChanged(object oldValue, object newValue)
{
double coercedValue = 0.0;
if (!(newValue is double) && ValueHelper.TryConvert(newValue, out coercedValue))
{
_isCoercingActualIndependentValue = true;
_oldActualIndependentValueBeforeCoercion = oldValue;
}
if (!_isCoercingActualIndependentValue)
{
if (_oldActualIndependentValueBeforeCoercion != null)
{
oldValue = _oldActualIndependentValueBeforeCoercion;
_oldActualIndependentValueBeforeCoercion = null;
}
RoutedPropertyChangedEventHandler <object> handler = this.ActualIndependentValueChanged;
if (handler != null)
{
handler(this, new RoutedPropertyChangedEventArgs <object>(oldValue, newValue));
}
}
if (_isCoercingActualIndependentValue)
{
_isCoercingActualIndependentValue = false;
this.ActualIndependentValue = coercedValue;
}
}
/// <summary>
/// Called when the IndependentValue property changes.
/// </summary>
/// <param name="oldValue">The old value.</param>
/// <param name="newValue">The new value.</param>
protected virtual void OnIndependentValuePropertyChanged(object oldValue, object newValue)
{
SetFormattedProperty(FormattedIndependentValueProperty, IndependentValueStringFormat, newValue);
RoutedPropertyChangedEventHandler <object> handler = this.IndependentValueChanged;
if (handler != null)
{
handler(this, new RoutedPropertyChangedEventArgs <object>(oldValue, newValue));
}
if (this.State == (int)DataPointState.Created)
{
// Prefer setting the value as a double...
double coercedNewValue;
if (ValueHelper.TryConvert(newValue, out coercedNewValue))
{
ActualIndependentValue = coercedNewValue;
}
else
{
// ... but fall back otherwise
ActualIndependentValue = newValue;
}
}
}
/// <summary>
/// Called when the DependentValue property changes.
/// </summary>
/// <param name="oldValue">The value to be replaced.</param>
/// <param name="newValue">The new value.</param>
protected virtual void OnDependentValuePropertyChanged(IComparable oldValue, IComparable newValue)
{
SetFormattedProperty(FormattedDependentValueProperty, DependentValueStringFormat, newValue);
RoutedPropertyChangedEventHandler <IComparable> handler = this.DependentValueChanged;
if (handler != null)
{
handler(this, new RoutedPropertyChangedEventArgs <IComparable>(oldValue, newValue));
}
if (this.State == (int)DataPointState.Created)
{
// Prefer setting the value as a double...
double coercedNewValue;
if (ValueHelper.TryConvert(newValue, out coercedNewValue))
{
ActualDependentValue = coercedNewValue;
}
else
{
// ... but fall back otherwise
ActualDependentValue = (double /*IComparable*/)newValue;
}
}
}
/// <summary>
/// Acquires an independent axis suitable for use with the data values of the series.
/// </summary>
/// <returns>Axis instance.</returns>
protected override IAxis AcquireIndependentAxis()
{
IAxis independentAxis = SeriesHost.Axes
.Where(a => (a.Orientation == AxisOrientation.X) && ((a is IRangeAxis) || (a is ICategoryAxis)) && DataItems.Any() && (a.CanPlot(DataItems.First().ActualIndependentValue)))
.FirstOrDefault();
if (null == independentAxis)
{
object probeValue = DataItems.Any() ? DataItems.First().ActualIndependentValue : null;
double convertedDouble;
DateTime convertedDateTime;
if ((null != probeValue) && ValueHelper.TryConvert(probeValue, out convertedDouble))
{
independentAxis = new LinearAxis();
}
else if ((null != probeValue) && ValueHelper.TryConvert(probeValue, out convertedDateTime))
{
independentAxis = new DateTimeAxis();
}
else
{
independentAxis = new CategoryAxis();
}
independentAxis.Orientation = AxisOrientation.X;
}
return(independentAxis);
}
/// <summary>
/// Creates the correct range axis based on the data.
/// </summary>
/// <param name="value">The value to evaluate to determine which type of
/// axis to create.</param>
/// <returns>The range axis appropriate that can plot the provided
/// value.</returns>
protected static IRangeAxis CreateRangeAxisFromData(object value)
{
double doubleValue;
DateTime dateTime;
if (ValueHelper.TryConvert(value, out doubleValue))
{
return(new LinearAxis());
}
else if (ValueHelper.TryConvert(value, out dateTime))
{
return(new DateTimeAxis());
}
else
{
return(null);
}
}
private static Storyboard CreateStoryboard(
FrameworkElement target,
DependencyProperty animatingDependencyProperty,
string propertyPath,
ref object toValue,
TimeSpan durationTimeSpan,
EasingFunctionBase easingFunction)
{
object fromValue = target.GetValue(animatingDependencyProperty);
double fromDoubleValue;
double toDoubleValue;
DateTime fromDateTime;
DateTime toDateTime;
Storyboard storyBoard = new Storyboard();
Storyboard.SetTarget(storyBoard, target);
Storyboard.SetTargetProperty(storyBoard, propertyPath);
if ((fromValue != null && toValue != null))
{
if (ValueHelper.TryConvert(fromValue, out fromDoubleValue) && ValueHelper.TryConvert(toValue, out toDoubleValue))
{
DoubleAnimation doubleAnimation = new DoubleAnimation();
doubleAnimation.EnableDependentAnimation = true;
#if !NO_EASING_FUNCTIONS
doubleAnimation.EasingFunction = easingFunction;
#endif
doubleAnimation.Duration = durationTimeSpan;
doubleAnimation.To = ValueHelper.ToDouble(toValue);
toValue = doubleAnimation.To;
storyBoard.Children.Add(doubleAnimation);
}
else if (ValueHelper.TryConvert(fromValue, out fromDateTime) && ValueHelper.TryConvert(toValue, out toDateTime))
{
ObjectAnimationUsingKeyFrames keyFrameAnimation = new ObjectAnimationUsingKeyFrames();
keyFrameAnimation.EnableDependentAnimation = true;
keyFrameAnimation.Duration = durationTimeSpan;
long intervals = (long)(durationTimeSpan.TotalSeconds * KeyFramesPerSecond);
if (intervals < 2L)
{
intervals = 2L;
}
IEnumerable <TimeSpan> timeSpanIntervals =
ValueHelper.GetTimeSpanIntervalsInclusive(durationTimeSpan, intervals);
IEnumerable <DateTime> dateTimeIntervals =
ValueHelper.GetDateTimesBetweenInclusive(fromDateTime, toDateTime, intervals);
IEnumerable <DiscreteObjectKeyFrame> keyFrames =
EnumerableFunctions.Zip(
dateTimeIntervals,
timeSpanIntervals,
(dateTime, timeSpan) => new DiscreteObjectKeyFrame()
{
Value = dateTime, KeyTime = timeSpan
});
foreach (DiscreteObjectKeyFrame keyFrame in keyFrames)
{
keyFrameAnimation.KeyFrames.Add(keyFrame);
toValue = keyFrame.Value;
}
storyBoard.Children.Add(keyFrameAnimation);
}
}
if (storyBoard.Children.Count == 0)
{
ObjectAnimationUsingKeyFrames keyFrameAnimation = new ObjectAnimationUsingKeyFrames();
keyFrameAnimation.EnableDependentAnimation = true;
DiscreteObjectKeyFrame endFrame = new DiscreteObjectKeyFrame()
{
Value = toValue, KeyTime = new TimeSpan(0, 0, 0)
};
keyFrameAnimation.KeyFrames.Add(endFrame);
storyBoard.Children.Add(keyFrameAnimation);
}
return(storyBoard);
}
/// <summary>
/// Returns a value indicating whether a value can plot.
/// </summary>
/// <param name="value">The value to plot.</param>
/// <returns>A value indicating whether a value can plot.</returns>
public override bool CanPlot(object value)
{
DateTime val;
return(ValueHelper.TryConvert(value, out val));
}
