public void Close(PopupItem item)
{
if (item == null)
{
return;
}
if (item._isClosing ||
!item._isHostAtViewStack)
{
return;
}
if (!this.Contains(item))
{
throw new InvalidOperationException("该项当前不可关闭，因为它不处于当前的视图栈");
}
item._isClosing = true;
CancelEventArgs ce = null;
try
{
item.InternalClosing(out ce);
}
catch (Exception)
{
item._isClosing = false;
throw;
}
void CloseAndDisposeItem(PopupItem popupItem)
{
this.RemoveItem(popupItem);
popupItem._isClosing = false;
try
{
popupItem.InternalClosed(out EventArgs e);
}
finally
{
popupItem.InternalDiapose();
}
}
//若所属父视图堆栈已关闭，不验证关于取消关闭的操作
if (item.ParentPopup?._isHostAtViewStack == false)
{
CloseAndDisposeItem(item);
}
else if (!ce.Cancel)
{
if (ViewPreferences.Instance.UsePopupViewAnimations)
{
var container = this.PopupContainerFromItem(item);
container.OnCloseAnimation(_p =>
{
//若不使用InvokeAsync调度，某些情况可能会出现页面不绘制问题
this.Dispatcher.InvokeAsync(() =>
{
CloseAndDisposeItem(item);
}, DispatcherPriority.Send);
});
}
else
{
CloseAndDisposeItem(item);
}
}
else
{
item._isClosing = false;
}
}
public void Close(PopupItem item)
{
if (item == null)
{
return;
}
if (item._isClosing ||
item._isClosed)
{
return;
}
if (!this.Contains(item))
{
throw new Exception("该项当前不可关闭，因为它不处于当前的试图堆栈");
}
item._isClosing = true;
CancelEventArgs ce = null;
try
{
item.InternalClosing(out ce);
}
catch (Exception)
{
item._isClosing = false;
throw;
}
void CloseAndDisposeItem(PopupItem popupItem)
{
this.RemoveItem(popupItem);
try
{
popupItem.InternalClosed(out EventArgs e);
}
finally
{
popupItem.InternalDiapose();
}
}
//若所属父视图堆栈已关闭
if (item.ParentPopup?._isClosed == true)
{
CloseAndDisposeItem(item);
}
else if (!ce.Cancel)
{
var container = this.PopupContainerFromItem(item);
container.OnCloseAnimation(_p =>
{
CloseAndDisposeItem(item);
});
}
else
{
item._isClosing = false;
}
}