private static void OnCountPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var element = sender as FrameworkElement;
if (element == null)
{
return;
}
if (GetCount(element) >= 20)
{
var x = (0.6 * rand.NextDouble() + 0.2) * element.ActualWidth;
var y = (0.6 * rand.NextDouble() + 0.2) * element.ActualHeight;
PoppinStars.LetsPoppin(element, new Point(x, y));
}
}
/// <summary>
/// サブの星を生成します。
/// </summary>
/// <param name="canvas">親パネルを指定します。</param>
/// <param name="leftTop">描画する左上点を指定します。</param>
/// <param name="rand">描画するためのランダム要素を決定するための乱数ジェネレータを指定します。</param>
/// <returns>生成した星を返します。</returns>
private UIElement CreateSubStar(Canvas canvas, Point leftTop, Random rand)
{
var scaling = 0.25;
var time = 200;
var duration = new Duration(TimeSpan.FromMilliseconds(400));
var size = GetSize(this.AdornedElement);
var scaleTransform = new ScaleTransform(scaling, scaling);
var transforms = new TransformGroup();
transforms.Children.Add(scaleTransform);
var brush = new SolidColorBrush(Color.FromRgb((byte)rand.Next(0x80, 0xff), (byte)rand.Next(0x80, 0xff), (byte)rand.Next(0x80, 0xff)));
var star = new PoppinStars()
{
Width = size.Width,
Height = size.Height,
RenderTransformOrigin = new Point(0.5, 0.5),
RenderTransform = transforms,
Fill = brush,
Stroke = brush,
};
Canvas.SetLeft(star, leftTop.X);
Canvas.SetTop(star, leftTop.Y);
star.Loaded += (_, __) =>
{
var nominal = star.ActualWidth / 2.0;
var r = rand.Next(8, 13) / 10.0;
var angle = rand.Next(0, 360);
var x = r * nominal * Math.Cos(angle);
var y = r * nominal * Math.Sin(angle);
var rotateTransform = new RotateTransform(angle);
transforms.Children.Add(rotateTransform);
var translateTransform = new TranslateTransform(-star.ActualWidth / 2.0, -star.ActualHeight / 2.0);
transforms.Children.Add(translateTransform);
var storyboard = new Storyboard();
var xTranslateAnimation = new DoubleAnimation()
{
By = x,
Duration = duration,
};
Storyboard.SetTarget(xTranslateAnimation, star);
Storyboard.SetTargetProperty(xTranslateAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[2].(TranslateTransform.X)"));
storyboard.Children.Add(xTranslateAnimation);
var yTranslateAnimation = new DoubleAnimation()
{
By = y,
Duration = duration,
};
Storyboard.SetTarget(yTranslateAnimation, star);
Storyboard.SetTargetProperty(yTranslateAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[2].(TranslateTransform.Y)"));
storyboard.Children.Add(yTranslateAnimation);
if (rand.Next() % 3 == 0)
{
var rotateAnimation = new DoubleAnimation()
{
By = 300,
Duration = duration,
};
Storyboard.SetTarget(rotateAnimation, star);
Storyboard.SetTargetProperty(rotateAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[1].(RotateTransform.Angle)"));
storyboard.Children.Add(rotateAnimation);
}
var xScaleAnimation = new DoubleAnimation()
{
To = 0,
BeginTime = TimeSpan.FromMilliseconds(time),
Duration = duration,
};
Storyboard.SetTarget(xScaleAnimation, star);
Storyboard.SetTargetProperty(xScaleAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"));
storyboard.Children.Add(xScaleAnimation);
var yScaleAnimation = new DoubleAnimation()
{
To = 0,
BeginTime = TimeSpan.FromMilliseconds(time),
Duration = duration,
};
Storyboard.SetTarget(yScaleAnimation, star);
Storyboard.SetTargetProperty(yScaleAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"));
storyboard.Children.Add(yScaleAnimation);
storyboard.Completed += (___, ____) =>
{
canvas.Children.Remove(star);
star = null;
RemoveAdorner(canvas);
};
storyboard.Begin();
};
return(star);
}
/// <summary>
/// メインの星を生成します。
/// </summary>
/// <param name="canvas">親パネルを指定します。</param>
/// <param name="leftTop">描画する左上点を指定します。</param>
/// <returns>生成した星を返します。</returns>
private UIElement CreateMainStar(Canvas canvas, Point leftTop)
{
var scaling = 0.6;
var time = 200;
var duration = new Duration(TimeSpan.FromMilliseconds(time));
var size = GetSize(this.AdornedElement);
var scaleTransform = new ScaleTransform(scaling, scaling);
var transforms = new TransformGroup();
transforms.Children.Add(scaleTransform);
var star = new PoppinStars()
{
Width = size.Width,
Height = size.Height,
Opacity = 0.0,
RenderTransformOrigin = new Point(0.5, 0.5),
RenderTransform = transforms,
StrokeThickness = 2.0,
};
Canvas.SetLeft(star, leftTop.X);
Canvas.SetTop(star, leftTop.Y);
star.Loaded += (_, __) =>
{
var translateTransform = new TranslateTransform(-star.ActualWidth / 2.0, -star.ActualHeight / 2.0);
transforms.Children.Add(translateTransform);
var storyboard = new Storyboard();
var opacityAnimation = new DoubleAnimation()
{
To = 1.0,
Duration = duration,
};
Storyboard.SetTarget(opacityAnimation, star);
Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath(PoppinStars.OpacityProperty));
storyboard.Children.Add(opacityAnimation);
var endOpacityAnimation = new DoubleAnimation()
{
To = 0.0,
BeginTime = TimeSpan.FromMilliseconds(time),
Duration = duration,
};
Storyboard.SetTarget(endOpacityAnimation, star);
Storyboard.SetTargetProperty(endOpacityAnimation, new PropertyPath(PoppinStars.OpacityProperty));
storyboard.Children.Add(endOpacityAnimation);
var xScaleAnimation = new DoubleAnimation()
{
To = 1.0,
Duration = duration,
};
Storyboard.SetTarget(xScaleAnimation, star);
Storyboard.SetTargetProperty(xScaleAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"));
storyboard.Children.Add(xScaleAnimation);
var yScaleAnimation = new DoubleAnimation()
{
To = 1.0,
Duration = duration,
};
Storyboard.SetTarget(yScaleAnimation, star);
Storyboard.SetTargetProperty(yScaleAnimation, new PropertyPath("(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"));
storyboard.Children.Add(yScaleAnimation);
storyboard.Completed += (___, ____) =>
{
canvas.Children.Remove(star);
star = null;
RemoveAdorner(canvas);
};
storyboard.Begin();
};
return(star);
}
