使用WPF制作一个手风琴式轮播图效果-创新互联
这篇文章运用简单易懂的例子给大家介绍使用WPF制作一个手风琴式轮播图效果,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。
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步骤:
1、自定义控件MyImageControl
实现图片的裁切和动画的赋值。
public partial class MyImageControl : UserControl { public static readonly DependencyProperty ShowImageProperty = DependencyProperty.Register("ShowImage", typeof(BitmapImage), typeof(MyImageControl), new PropertyMetadata(null)); public BitmapImage ShowImage { get { return (BitmapImage)GetValue(ShowImageProperty); } set { SetValue(ShowImageProperty, value); } } public MyImageControl() { InitializeComponent(); } public Storyboard storyboard = new Storyboard(); private const int FlipCount = 5; BitmapSource[] bitmap = new BitmapSource[FlipCount]; Image[] images = new Image[FlipCount]; public void GetHorizontalFlip() { int partImgWidth = (int)this.ShowImage.PixelWidth; int partImgHeight = (int)(this.ShowImage.PixelHeight / FlipCount); for (int i = 0; i < FlipCount; i++) { bitmap[i] = GetPartImage(this.ShowImage, 0, i * partImgHeight, partImgWidth, partImgHeight); images[i] = new Image() { Width = partImgWidth, Height = partImgHeight, Source = bitmap[i], }; Canvas.SetTop(images[i], i * partImgHeight); this.mainCanvas.Children.Add(images[i]); DoubleAnimation da = new DoubleAnimation(0, (int)this.ShowImage.PixelWidth, new Duration(TimeSpan.FromMilliseconds((i + 1) * 250)), FillBehavior.HoldEnd); storyboard.Children.Add(da); Storyboard.SetTarget(da, images[i]); Storyboard.SetTargetProperty(da, new PropertyPath("(Canvas.Left)")); } storyboard.FillBehavior = FillBehavior.HoldEnd; storyboard.Completed += new EventHandler(Storyboard_Completed); } private void Storyboard_Completed(object sender, EventArgs e) { this.mainCanvas.Children.Clear(); storyboard.Children.Clear(); } private BitmapSource GetPartImage(BitmapImage img, int XCoordinate, int YCoordinate, int Width, int Height) { return new CroppedBitmap(img, new Int32Rect(XCoordinate, YCoordinate, Width, Height)); } }
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