WPF效果之框选ListBox

前面效果中基于ListBox实现了一点不一样的效果;今天再次在原来的基础上完善框选ListBox;最终实现的效果点击下方链接查看:

f553ca6ee2491687108cde4d571d7f26_哔哩哔哩_bilibili

进度条，百分之95

1、使用了VisualTreeHelper的HitTest方法:

 Point point2 = e.GetPosition(LedListBox);
 Rect rect = new Rect(origContentMouseDownPoint, point2);
 RectangleGeometry rectangleGeometry = new RectangleGeometry(rect);
 VisualTreeHelper.HitTest(LedListBox, new HitTestFilterCallback(OnHitTestFilterCallback), new HitTestResultCallback(OnHitTestResultCallback), new GeometryHitTestParameters(rectangleGeometry));

2、关于OnHitTestFilterCallback:

 private HitTestFilterBehavior OnHitTestFilterCallback(DependencyObject target)
 {
     UIElement element = target as UIElement;
     if(element != null)
     {
         var img = element as CheckBox;
         if(img != null && img.IsVisible == true)
         {
             img.IsChecked = true;
             return HitTestFilterBehavior.Continue;
         }
     }
     return HitTestFilterBehavior.Continue;
 }

最终简单的效果先这样吧,以后有时间的话,可以再去摸索一下更复杂的效果吧；