protected sealed override void UpdateDots()
{
if (DotCount < 1)
{
return;
}
PrivateCanvas.Children.Clear();
//计算相关尺寸
var centerWidth = DotDiameter * DotCount + DotInterval * (DotCount - 1) + MoveLength;
var speedDownLength = (ActualWidth - MoveLength) / 2;
var speedUniformLength = centerWidth / 2;
//定义动画
Storyboard = new Storyboard {
RepeatBehavior = RepeatBehavior.Forever
};
//创建圆点
for (var i = 0; i < DotCount; i++)
{
var ellipse = CreateEllipse();
var frames = new ThicknessAnimationUsingKeyFrames
{
BeginTime = TimeSpan.FromMilliseconds(DotDelayTime * i)
};
//开始位置
var frame0 = new LinearThicknessKeyFrame
{
Value = new Thickness(ellipse.Margin.Left, 0, 0, 0),
KeyTime = KeyTime.FromTimeSpan(TimeSpan.Zero)
};
//开始位置到匀速开始
var frame1 = new EasingThicknessKeyFrame
{
EasingFunction = new PowerEase
{
EasingMode = EasingMode.EaseOut
},
Value = new Thickness(speedDownLength + ellipse.Margin.Left, 0, 0, 0),
KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(DotSpeed * (1 - UniformScale) / 2))
};
//匀速开始到匀速结束
var frame2 = new LinearThicknessKeyFrame
{
Value = new Thickness(speedDownLength + speedUniformLength + ellipse.Margin.Left, 0, 0, 0),
KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(DotSpeed * (1 + UniformScale) / 2))
};
//匀速结束到匀加速结束
var frame3 = new EasingThicknessKeyFrame
{
EasingFunction = new PowerEase
{
EasingMode = EasingMode.EaseIn
},
Value = new Thickness(ActualWidth + ellipse.Margin.Left + speedUniformLength, 0, 0, 0),
KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(DotSpeed))
};
frames.KeyFrames.Add(frame0);
frames.KeyFrames.Add(frame1);
frames.KeyFrames.Add(frame2);
frames.KeyFrames.Add(frame3);
Storyboard.SetTarget(frames, ellipse);
Storyboard.SetTargetProperty(frames, new PropertyPath(MarginProperty));
Storyboard.Children.Add(frames);
PrivateCanvas.Children.Add(ellipse);
}
Storyboard.Begin();
}
public ShakeShakeAnimation(Thickness original)
{
originalThickness = original;
const double amplitude = 0.02;
double tLeft, tRight;
tLeft = original.Left;
tRight = original.Right;
double shakeQuantity = Math.Min(tLeft, tRight);
ThicknessKeyFrame kf1 = new LinearThicknessKeyFrame()
{
Value = new Thickness()
{
Left = originalThickness.Left - shakeQuantity,
Top = originalThickness.Top,
Right = originalThickness.Right + shakeQuantity,
Bottom = originalThickness.Bottom
},
KeyTime = KeyTime.FromPercent(1 * amplitude)
};
ThicknessKeyFrame kf2 = new LinearThicknessKeyFrame()
{
Value = new Thickness()
{
Left = originalThickness.Left + shakeQuantity,
Top = originalThickness.Top,
Right = originalThickness.Right - shakeQuantity,
Bottom = originalThickness.Bottom
},
KeyTime = KeyTime.FromPercent(3 * amplitude)
};
ThicknessKeyFrame kf3 = new LinearThicknessKeyFrame()
{
Value = new Thickness()
{
Left = originalThickness.Left - shakeQuantity,
Top = originalThickness.Top,
Right = originalThickness.Right + shakeQuantity,
Bottom = originalThickness.Bottom
},
KeyTime = KeyTime.FromPercent(5 * amplitude)
};
ThicknessKeyFrame kf4 = new LinearThicknessKeyFrame()
{
Value = new Thickness()
{
Left = originalThickness.Left,
Top = originalThickness.Top,
Right = originalThickness.Right,
Bottom = originalThickness.Bottom
},
KeyTime = KeyTime.FromPercent(6 * amplitude)
};
Duration = new Duration(new TimeSpan(0, 0, 2));
KeyFrames.Add(kf1);
KeyFrames.Add(kf2);
KeyFrames.Add(kf3);
KeyFrames.Add(kf4);
RepeatBehavior = RepeatBehavior.Forever;
}
