【WP8】仿QQ提示消息

WP版的QQ提示消息的时候从顶部滑入，3秒后从顶部滑出，本文模仿该效果实现一个MessageToastManager类用于显示提示消息

思路很简单，就是动画而已，支持配置颜色和回掉

// *************************************************
// 
// 作者：bomo
// 小组：WP开发组
// 创建日期：2014/7/7 15:18:12
// 版本号：V1.00
// 说明: 
// 
// *************************************************
// 
// 修改历史: 
// Date                WhoChanges        Made 
// 2014/7/7 15:18:12            bomo         Initial creation 
//
// *************************************************

using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace XTuOne.Utility.Helpers
{
    /// <summary>
    /// 消息提示工具
    /// </summary>
    public class MessageToastManager
    {
        private static readonly Color defaultForegroundColor = Color.FromArgb(255, 255, 144, 0);
        private static readonly Color defaultBackgroundColor = Colors.White;

        public static void Show(string text, Action complete = null, double height = 40)
        {
            Show(text, defaultForegroundColor, defaultBackgroundColor, complete, height);
        }
        
        public static void Show(string text, Color foregroundColor, Color backgroundColor, Action complete = null, double height = 40)
        {
            Show(text, new SolidColorBrush(foregroundColor), new SolidColorBrush(backgroundColor), complete, height);
        }

        public static void Show(string text, Brush foregroundBrush, Brush backgroundBrush, Action complete = null, double height = 40)
        {
            var p = new Popup
            {
                Child = new Border
                {
                    Width = Application.Current.Host.Content.ActualWidth,
                    Background = backgroundBrush,
                    Child = new TextBlock
                    {
                        Text = text,
                        Foreground = foregroundBrush,
                        FontSize = (double)Application.Current.Resources["PhoneFontSizeNormal"],
                        VerticalAlignment = VerticalAlignment.Center,
                        Margin = new Thickness(10, 0, 0, 0)
                    }
                }
            };

            Show(p, complete, height);
        }

        private static void Show(Popup popup, Action complete = null, double height = 40)
        {
            if (!(popup.Child.RenderTransform is CompositeTransform))
            {
                popup.Child.RenderTransform = new CompositeTransform();
            }
            ((CompositeTransform)popup.Child.RenderTransform).TranslateY = -height;

            Debug.Assert(popup.Child is FrameworkElement);

            var element =popup.Child as FrameworkElement;
            element.Height = height;

            var storyboard = new Storyboard
            {
                AutoReverse = false
            };

            var doubleAnimaionUsingKeyFrames = new DoubleAnimationUsingKeyFrames();
            Storyboard.SetTarget(doubleAnimaionUsingKeyFrames, popup.Child);
            Storyboard.SetTargetProperty(doubleAnimaionUsingKeyFrames, new PropertyPath("(UIElement.Opacity)", new object[0]));
            storyboard.Children.Add(doubleAnimaionUsingKeyFrames);
            
            //0.5秒透明度从0-1
            var doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0.5)),
                Value = 1,
                EasingFunction = new CubicEase {EasingMode = EasingMode.EaseOut}
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);
            doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2.4)),
                Value = 0.995,
                EasingFunction = new CubicEase { EasingMode = EasingMode.EaseIn }
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);
            doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(3)),
                Value = 0.1,
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);


            
            doubleAnimaionUsingKeyFrames = new DoubleAnimationUsingKeyFrames();
            Storyboard.SetTarget(doubleAnimaionUsingKeyFrames, popup.Child);
            Storyboard.SetTargetProperty(doubleAnimaionUsingKeyFrames, new PropertyPath("(UIElement.RenderTransform).(CompositeTransform.TranslateY)", new object[0]));
            storyboard.Children.Add(doubleAnimaionUsingKeyFrames);
            doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0.5)),
                Value = 0,
                EasingFunction = new CubicEase { EasingMode = EasingMode.EaseOut }
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);
            doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2.4)),
                Value = 0,
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);
            doubleKeyFrame = new EasingDoubleKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(3)),
                Value = -height,
                EasingFunction = new CubicEase { EasingMode = EasingMode.EaseIn }
            };
            doubleAnimaionUsingKeyFrames.KeyFrames.Add(doubleKeyFrame);

            var objectAnimaionUsingKeyFrames = new ObjectAnimationUsingKeyFrames();
            Storyboard.SetTarget(objectAnimaionUsingKeyFrames, popup);
            Storyboard.SetTargetProperty(objectAnimaionUsingKeyFrames, new PropertyPath("(Popup.IsOpen)", new object[0]));
            storyboard.Children.Add(objectAnimaionUsingKeyFrames);

            var discreteObjectKeyFrame = new DiscreteObjectKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0)),
                Value = true
            };
            objectAnimaionUsingKeyFrames.KeyFrames.Add(discreteObjectKeyFrame);
            
            discreteObjectKeyFrame = new DiscreteObjectKeyFrame
            {
                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromSeconds(3)),
                Value = false
            };
            objectAnimaionUsingKeyFrames.KeyFrames.Add(discreteObjectKeyFrame);

            if (complete!=null)
            {
                storyboard.Completed += (s, e) => complete.Invoke();
            }

            storyboard.Begin();
        }
    }
}