WPF window 子視窗反饋效果（拉動/漸層)

標籤：animation   漸層   Owner   and   ref   var   mil   視窗   present   

 當子視窗顯示後，點擊子視窗外部，需要有反饋動畫。

實現：

1.事件捕捉

每次點擊子視窗外部，即母視窗時，事件捕捉如下

HwndSource hwndSource = PresentationSource.FromVisual(this.Owner) as HwndSource;//視窗過程

hwndSource?.AddHook(WndProc);

 也可以調用WindowInteropHelper，擷取母視窗控制代碼。

var hwnd = new WindowInteropHelper(this.Owner).Handle;
if (hwnd != IntPtr.Zero)
{
　　var hwndSource = HwndSource.FromHwnd(hwnd);
　　hwndSource?.AddHook(WndProc);
}

事件中，啟動動畫

 private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)    {         if (msg != 0x20) return IntPtr.Zero;         if (lParam.ToInt32() == 0x201fffe) _storyboard?.Begin();         return IntPtr.Zero;    }

 

2.動畫設定

視窗抖動 動畫

            var scaleXDoubleAnimation = new DoubleAnimationUsingKeyFrames();            var scaleYDoubleAnimation = new DoubleAnimationUsingKeyFrames();            scaleXDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)),Value = 1.0});            scaleXDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(100)),Value = 0.9});            scaleXDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(200)),Value = 1.0});            scaleYDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)),Value = 1.0});            scaleYDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(100)),Value = 0.9});            scaleYDoubleAnimation.KeyFrames.Add(new EasingDoubleKeyFrame            {                KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(200)),                Value = 1.0            });            Storyboard.SetTarget(scaleXDoubleAnimation, window);            Storyboard.SetTarget(scaleYDoubleAnimation, window);            Storyboard.SetTargetProperty(scaleXDoubleAnimation, new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleX)"));            Storyboard.SetTargetProperty(scaleYDoubleAnimation, new PropertyPath("(UIElement.RenderTransform).(ScaleTransform.ScaleY)"));            _storyboard = new Storyboard{Children =new TimelineCollection { scaleXDoubleAnimation, scaleYDoubleAnimation }};

 

視窗陰影 動畫

            var animation = new DoubleAnimationUsingKeyFrames();            animation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0)),Value = 0});            animation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(200)),Value = 50});            animation.KeyFrames.Add(new EasingDoubleKeyFrame{KeyTime = KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(400)),Value = 0});                        Storyboard.SetTarget(animation, window);            Storyboard.SetTargetProperty(animation, new PropertyPath("(FrameworkElement.Effect).(DropShadowEffect.BlurRadius)"));            _storyboard = new Storyboard            {                Children = new TimelineCollection { animation }            };

 

WPF window 子視窗反饋效果（拉動/漸層)