/// <summary>
/// Sets up stars when Value or NumberOfStars properties change
/// Will only show up to the number of stars requested (up to Maximum)
/// so if Value > NumberOfStars * 1, then Value is clipped to maximum
/// number of full stars
/// </summary>
/// <param name="ratingsControl"></param>
private static void SetupStars(RatingsControl ratingsControl)
{
Decimal localValue = ratingsControl.Value;
ratingsControl.spStars.Children.Clear();
for (int i = 0; i < ratingsControl.NumberOfStars; i++)
{
StarControl star = new StarControl();
star.BackgroundColor = ratingsControl.BackgroundColor;
star.StarForegroundColor = ratingsControl.StarForegroundColor;
star.StarOutlineColor = ratingsControl.StarOutlineColor;
if (localValue > 1)
{
star.Value = 1.0m;
}
else if (localValue > 0)
{
star.Value = localValue;
}
else
{
star.Value = 0.0m;
}
localValue -= 1.0m;
ratingsControl.spStars.Children.Insert(i, star);
}
}
/// <summary>
/// Handles changes to the StarForegroundColor property.
/// </summary>
private static void OnStarForegroundColorChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
StarControl control = (StarControl)d;
control.starForeground.Fill = (SolidColorBrush)e.NewValue;
}
/// <summary>
/// Handles changes to the StarOutlineColor property.
/// </summary>
private static void OnStarOutlineColorChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
StarControl control = (StarControl)d;
control.starOutline.Stroke = (SolidColorBrush)e.NewValue;
}
/// <summary>
/// Handles changes to the BackgroundColor property.
/// </summary>
private static void OnBackgroundColorChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
StarControl control = (StarControl)d;
control.gdStar.Background = (SolidColorBrush)e.NewValue;
control.mask.Fill = (SolidColorBrush)e.NewValue;
}
/// <summary>
/// Coerces the Value value.
/// </summary>
private static object CoerceValueValue(DependencyObject d, object value)
{
StarControl starControl = (StarControl)d;
Decimal current = (Decimal)value;
if (current < starControl.Minimum)
{
current = starControl.Minimum;
}
if (current > starControl.Maximum)
{
current = starControl.Maximum;
}
return(current);
}
/// <summary>
/// Handles changes to the Value property.
/// </summary>
private static void OnValueChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
d.CoerceValue(MinimumProperty);
d.CoerceValue(MaximumProperty);
StarControl starControl = (StarControl)d;
if (starControl.Value == 0.0m)
{
starControl.starForeground.Fill = Brushes.Gray;
}
else
{
starControl.starForeground.Fill = starControl.StarForegroundColor;
}
Int32 marginLeftOffset = (Int32)(starControl.Value * (Decimal)STAR_SIZE);
starControl.mask.Margin = new Thickness(marginLeftOffset, 0, 0, 0);
starControl.InvalidateArrange();
starControl.InvalidateMeasure();
starControl.InvalidateVisual();
}