/// <summary>
/// 生成一个 SplineThicknessKeyFrame 对象
/// </summary>
/// <param name="kTime">应到达关键帧的目标 System.Windows.Media.Animation.ThicknessKeyFrame.Value 的时间</param>
/// <param name="ellipseLeftMarginVal">关键帧的目标值</param>
/// <returns>返回一个新的 SplineThicknessKeyFrame 对象</returns>
private SplineThicknessKeyFrame CreateSplineThicknessKeyFrame(KeyTime kTime, Thickness ellipseLeftMarginVal)
{
SplineThicknessKeyFrame sThicknessKeyFrame = new SplineThicknessKeyFrame();
sThicknessKeyFrame.KeyTime = kTime;
sThicknessKeyFrame.Value = ellipseLeftMarginVal;
return(sThicknessKeyFrame);
}
/// <summary>
/// Start thinkness animation.
/// </summary>
/// <param name="parent">Object that contains property.</param>
/// <param name="propertyName">A name of the property.</param>
/// <param name="propertyPath">A path that describe the dependency property to be animated.</param>
/// <param name="duration">How many time would take transit.</param>
/// <param name="from">Start value.</param>
/// <param name="to">Finish value.</param>
/// <param name="fillBehavior">
/// Specifies how a System.Windows.Media.Animation.Timeline behaves when it is outside
/// its active period but its parent is inside its active or hold period.</param>
/// <param name="initHandler">Handler that would be called before animation start.
/// There you can subscrube on events or reconfigurate settigns.</param>
/// <returns>Created storyboard.</returns>
public static Storyboard StartStoryboard(
FrameworkElement parent,
string propertyName,
PropertyPath propertyPath,
TimeSpan duration,
Thickness from,
Thickness to,
FillBehavior fillBehavior,
Action <Storyboard> initHandler)
{
// Create a storyboard to contains the animations.
Storyboard storyboard = new Storyboard
{
FillBehavior = fillBehavior
};
// Add the animation to the storyboard
ThicknessAnimationUsingKeyFrames animation = new ThicknessAnimationUsingKeyFrames();
storyboard.Children.Add(animation);
animation.Duration = new Duration(duration);
animation.AccelerationRatio = 1.0f;
// Set start position.
SplineThicknessKeyFrame startKey = new SplineThicknessKeyFrame(
from,
KeyTime.FromPercent(0));
//// Set start position.
//SplineThicknessKeyFrame middleKey = new SplineThicknessKeyFrame(
// new Thickness(Lerp(from.Left, to.Right, ),
// KeyTime.FromPercent(0.62));
// Set finish position.
SplineThicknessKeyFrame finishKey = new SplineThicknessKeyFrame(
to,
KeyTime.FromPercent(1));
// Configure the animation to target de property Opacity
Storyboard.SetTargetName(animation, propertyName);
Storyboard.SetTargetProperty(animation, propertyPath);
// Add keys.
animation.KeyFrames.Add(startKey);
//animation.KeyFrames.Add(middleKey);
animation.KeyFrames.Add(finishKey);
// Inform subscribers.
initHandler?.Invoke(storyboard);
// Begin the storyboard
try
{
storyboard.Begin(parent);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return(storyboard);
}
private void TextBox_GotFocus(object sender, RoutedEventArgs e)
{
double fleft, ftop, fwidth;
TextBox ntb = (TextBox)sender;
if (tb == null)
{
fleft = ntb.Margin.Left;
ftop = ntb.Margin.Top;
fwidth = ntb.Width;
}
else
{
//获得失去焦点的文本框的位置
fleft = tb.Margin.Left;
ftop = tb.Margin.Top;
fwidth = tb.Width;
}
//获得获得焦点的文本框的位置
double nleft = ntb.Margin.Left;
double ntop = ntb.Margin.Top;
double nwidth = ntb.Width;
//开启动画效果
//ThicknessAnimation ta = new ThicknessAnimation();
SplineThicknessKeyFrame stk1 = new SplineThicknessKeyFrame();
SplineThicknessKeyFrame stk2 = new SplineThicknessKeyFrame();
ThicknessAnimationUsingKeyFrames du = new ThicknessAnimationUsingKeyFrames();
stk1.Value = new Thickness(fleft, ftop, 0, 0);
stk2.Value = new Thickness(nleft, ntop, 0, 0);
stk1.KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0));
stk2.KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(400));
stk2.KeySpline = new KeySpline(0, 0, 0, 1);
du.KeyFrames.Add(stk1);
du.KeyFrames.Add(stk2);
//ta.From = new Thickness(fleft,ftop,0,0);
//ta.To = new Thickness(nleft, ntop, 0, 0);
//ta.Duration = new Duration(TimeSpan.FromMilliseconds(200));
Storyboard.SetTargetName(du, "Margin");
Storyboard.SetTargetProperty(du, new PropertyPath(Border.MarginProperty));
Storyboard storyBoard = new Storyboard();
storyBoard.Children.Add(du);
this.RegisterName("Margin", this.ColorFulBorder);
DoubleAnimation ta = new DoubleAnimation();
ta.From = 0;
ta.To = 0.5;
ta.Duration = new Duration(TimeSpan.FromMilliseconds(100));
Storyboard.SetTargetName(ta, "Opacity");
Storyboard.SetTargetProperty(ta, new PropertyPath(Border.OpacityProperty));
Storyboard storyBoard2 = new Storyboard();
storyBoard2.Children.Add(ta);
this.RegisterName("Opacity", this.ColorFulBorder);
storyBoard2.Begin(this, true);
DoubleAnimation tw = new DoubleAnimation();
tw.From = fwidth;
tw.To = nwidth;
tw.Duration = new Duration(TimeSpan.FromMilliseconds(100));
Storyboard.SetTargetName(tw, "Width");
Storyboard.SetTargetProperty(tw, new PropertyPath(Border.WidthProperty));
Storyboard storyBoard3 = new Storyboard();
storyBoard3.Children.Add(tw);
this.RegisterName("Width", this.ColorFulBorder);
storyBoard3.Begin(this, true);
storyBoard.Begin(this, true);
}
