WPF 图层管理

最新推荐文章于 2024-09-04 23:05:31 发布

Jiminull

最新推荐文章于 2024-09-04 23:05:31 发布

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分类专栏：知识档

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置顶：

private
void BringToFront(List<UIElement> CurrentSelection ,UIElementCollection childrens)
      {
          List<UIElement> selectionSorted = (from item
in CurrentSelection
                                             orderby Canvas.GetZIndex(item
as UIElement) ascending
                                             select item
as UIElement).ToList();
 
          List<UIElement> childrenSorted = (from UIElement item
in childrens
                                            orderby Canvas.GetZIndex(item
as UIElement) ascending
                                            select item
as UIElement).ToList();
 
          int
i = 0; 
          int
j = 0; 
          foreach
(UIElement item in
childrenSorted) 
          {
              if
(selectionSorted.Contains(item)) 
              {
                  int
idx = Canvas.GetZIndex(item); 
                  Canvas.SetZIndex(item, childrenSorted.Count - selectionSorted.Count + j++);
              }
              else
              {
                  Canvas.SetZIndex(item, i++);
              }
          }
      }

置底：

private
void SendToBack(List<UIElement> CurrentSelection ,UIElementCollection childrens)<BR>        {
         List<UIElement> selectionSorted = (from item
in CurrentSelection
                                            orderby Canvas.GetZIndex(item
as UIElement) ascending
                                            select item
as UIElement).ToList();
 
         List<UIElement> childrenSorted = (from UIElement item
in childrens<BR>
                                           orderby Canvas.GetZIndex(item
as UIElement) ascending
                                           select item
as UIElement).ToList();
         int
i = 0; 
         int
j = 0; 
         foreach
(UIElement item in
childrenSorted) 
         {
             if
(selectionSorted.Contains(item)) 
             {
                 int
idx = Canvas.GetZIndex(item); 
                 Canvas.SetZIndex(item, j++);
 
             }
             else
             {
                 Canvas.SetZIndex(item, selectionSorted.Count + i++);
             }
         }
     }

　置下一层：

private
void SendBackward(List<UIElement> CurrentSelection ,UIElementCollection childrens)

<SPAN class=Apple-style-span>        {
            List<UIElement> ordered = (from item
in CurrentSelection
                                       orderby Canvas.GetZIndex(item
as UIElement) ascending
                                       select item
as UIElement).ToList();
  
            int
count = </SPAN>childrens.Count;<BR><SPAN class=Apple-style-span>
            for
(int 
i = 0; i < ordered.Count; i++) 
            {
                int
currentIndex = Canvas.GetZIndex(ordered[i]); 
                int
newIndex = Math.Max(i, currentIndex - 1); 
                if
(currentIndex != newIndex) 
                {
                    Canvas.SetZIndex(ordered[i], newIndex);
                    IEnumerable<UIElement> it =</SPAN>childrens.OfType<UIElement>().Where(item => Canvas.GetZIndex(item) == newIndex);<BR><SPAN
class=Apple-style-span>
                    foreach
(UIElement elm in
it) 
                    {
                        if
(elm != ordered[i]) 
                        {
                            Canvas.SetZIndex(elm, currentIndex);
                            break;
                        }
                    }
                }
            }
        }
</SPAN>

　置上一层：

private
void BringForward(List<UIElement> CurrentSelection ,UIElementCollection childrens)

<SPAN class=Apple-style-span>        {
            List<UIElement> ordered = (from item
in CurrentSelection
                                       orderby Canvas.GetZIndex(item
as UIElement) descending
                                       select item
as UIElement).ToList();
  
            int
count = </SPAN>childrens.Count;<BR><SPAN class=Apple-style-span>
            for
(int 
i = 0; i < ordered.Count; i++) 
            {
                int
currentIndex = Canvas.GetZIndex(ordered[i]); 
                int
newIndex = Math.Min(count - 1 - i, currentIndex + 1); 
                if
(currentIndex != newIndex) 
                {
                    Canvas.SetZIndex(ordered[i], newIndex);
                    IEnumerable<UIElement> it =
this.Children.OfType<UIElement>().Where(item => Canvas.GetZIndex(item) == newIndex);
  
                    foreach
(UIElement elm in
it) 
                    {
                        if
(elm != ordered[i]) 
                        {
                            Canvas.SetZIndex(elm, currentIndex);
                            break;
                        }
                    }
                }
            }
        }
</SPAN>