static void OnFrameworkElementLoaded(object sender, RoutedEventArgs e)
{
(sender as FrameworkElement).Loaded -= OnFrameworkElementLoaded;
ShowLoadingContext p = null;
lock (list)
{
foreach (var item in list)
{
if (item.Target == sender)
{
p = item;
break;
}
}
if (p != null)
{
list.Remove(p);
}
}
if (p != null)
{
p.Target.ShowLoading(p.percent, p.loadingName, p.LoadingSize, p.HorizontalAlignment, p.VerticalAlignment, p.Margin, p.Size);
}
}
//public static void ShowLoading(this UIElement element, bool isAutoClose=false)
//{
// ShowLoading(element, string.Empty, string.Empty, 60, HorizontalAlignment.Center, VerticalAlignment.Center, null, null, false, Brushes.Gray, null);
// Task.Factory.StartNew(() =>
// {
// Task.Delay(10 * 1000);
// if (element == null || element.Dispatcher == null) return;
// element.Dispatcher.BeginInvoke(new Action(() => { element.HideLoading(); }));
// });
//}
//public static void UpdateLoading(this UIElement element, string Percent = "", string LoadingName = "")
//{
// ShowLoading(element, Percent, LoadingName, 60, HorizontalAlignment.Center, VerticalAlignment.Center, null, null, false, Brushes.Gray, null);
//}
public static void HideLoading(this UIElement element, bool disableElement = false)
{
if (element == null || element.Dispatcher == null)
{
return;
}
if (element.Dispatcher.CheckAccess())
{
element.IsEnabled = !disableElement;
element.IsHitTestVisible = true;
AdornerLayer layer = AdornerLayer.GetAdornerLayer(element);
if (layer == null)
{
var win = element as Window;
if (win != null && win.Content != null && win.Content is UIElement)
{
element = win.Content as UIElement;
layer = AdornerLayer.GetAdornerLayer(element);
}
else if (element is FrameworkElement)
{
FrameworkElement fe = element as FrameworkElement;
if (!fe.IsLoaded)
{
lock (list)
{
ShowLoadingContext target = null;
foreach (var p in list)
{
if (p.Target == fe)
{
target = p;
break;
}
}
if (target != null)
{
list.Remove(target);
}
}
fe.Loaded -= OnFrameworkElementLoaded;
return;
}
}
}
if (layer != null)
{
LoadingAdorner target = null;
var items = layer.GetAdorners(element);
if (items != null)
{
foreach (var item in items)
{
if (item is LoadingAdorner)
{
target = item as LoadingAdorner;
if (target != null)
{
layer.Remove(target);
target.Dispose();
}
}
}
}
}
}
else
{
Action <UIElement, Boolean> action = HideLoading;
element.Dispatcher.BeginInvoke(action, element, disableElement);
}
}
public static void ShowLoading(this UIElement element,
string Percent,
string LoadingName,
double loadingSize = 60,
HorizontalAlignment horizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment verticalAlignment = VerticalAlignment.Center,
Thickness?margin = null,
Size?size = null,
bool disableElement = false,
Brush background = null,
Brush foreground = null)
{
element.IsEnabled = !disableElement;
if (element == null || element.Dispatcher == null)
{
return;
}
if (element.Dispatcher.CheckAccess())
{
AdornerLayer layer = AdornerLayer.GetAdornerLayer(element);
if (layer == null)
{
var win = element as Window;
element.IsHitTestVisible = false;
if (win != null && win.Content != null && win.Content is UIElement)
{
element = win.Content as UIElement;
//var tag = ((Grid) element).Tag as UIElement;
//if (tag != null)
//{
// layer = AdornerLayer.GetAdornerLayer(tag);
// element = tag;
//}
//else
//{
// layer = AdornerLayer.GetAdornerLayer(element);
//}
layer = AdornerLayer.GetAdornerLayer(element);
}
else if (element is FrameworkElement)
{
FrameworkElement fe = element as FrameworkElement;
if (!fe.IsLoaded)
{
//此处用匿名委托的好处是ShowLoading的参数可以直接传到匿名委托中，但是却没有办法在HideLoading时注销此匿名委托
//在控件未 load 之前调用 ShowLoading 再立刻调用HideLoading时 就会发现控件在Loaded之后会显示遮罩,却无法消失
//RoutedEventHandler handler = null;
//handler = (s, e) =>
//{
// fe.Loaded -= handler;
// (s as FrameworkElement).ShowLoading(loadingSize, horizontalAlignment, verticalAlignment, margin, size);
//};
//fe.Loaded += handler;
ShowLoadingContext p = new ShowLoadingContext {
Target = fe, LoadingSize = loadingSize, HorizontalAlignment = horizontalAlignment, VerticalAlignment = verticalAlignment, Margin = margin, Size = size, percent = Percent, loadingName = LoadingName
};
lock (list)
{
var exist = false;
foreach (var item in list)
{
if (item.Target == fe)
{
item.LoadingSize = loadingSize;
item.HorizontalAlignment = horizontalAlignment;
item.VerticalAlignment = verticalAlignment;
item.Margin = margin;
item.Size = size;
exist = true;
break;
}
}
if (!exist)
{
list.Add(p);
fe.Loaded += OnFrameworkElementLoaded;
}
}
return;
}
}
}
if (layer != null)
{
var ads = layer.GetAdorners(element);
bool hasFound = false;
if (ads != null)
{
foreach (var ad in ads)
{
if (ad is LoadingAdorner)
{
var loading = ad as LoadingAdorner;
loading.UpdateLoading(Percent, LoadingName);
hasFound = true;
}
}
}
if (!hasFound)
{
layer.Add(new LoadingAdorner(element, Percent, LoadingName)
{
LoadingSize = loadingSize,
LoadingVerticalAlignment = verticalAlignment,
LoadingHorizontalAlignment = horizontalAlignment,
LoadingMargin = margin ?? new Thickness(0, 0, 0, 0),
Size = size ?? Size.Empty,
Foreground = foreground,
Background = background,
});
}
}
}
else
{
Action <UIElement, string, string, Double, HorizontalAlignment, VerticalAlignment, Thickness?, Size?, bool, Brush, Brush> action = ShowLoading;
element.Dispatcher.BeginInvoke(action, element, loadingSize, horizontalAlignment, verticalAlignment, margin, size, disableElement, background, foreground);
}
}
