private void CustomVirtualizingStackPanel_MouseWheelDownEvent(object sender, RoutedEventArgs e)
{
CustomVirtualizingStackPanel panel = sender as CustomVirtualizingStackPanel;
if (panel != null)
{
ScrollViewer scrollViewer = GetParent <ScrollViewer>(panel);
if (scrollViewer != null)
{
double dVer = scrollViewer.VerticalOffset;
double dViewport = scrollViewer.ViewportHeight;
double dExtent = scrollViewer.ExtentHeight;
//滚动至最底部
if (dVer + dViewport >= dExtent)
{
ResultPage page = scrollViewer.Tag as ResultPage;
if (page != null)
{
page.Start();
}
}
}
}
}
private void PaginationVirtualizingWrapPanel_PageIndexChanged(object sender, RoutedEventArgs e)
{
PaginationVirtualizingWrapPanel panel = sender as PaginationVirtualizingWrapPanel;
if (panel != null &&
panel.PageIndex + 1 == panel.PageCount)
{
ItemsControl itemsControl = GetParent <ItemsControl>(panel);
if (itemsControl != null)
{
ResultPage page = itemsControl.Tag as ResultPage;
if (page != null)
{
page.Start();
}
}
}
}
public void Search(SearchSuggestionItem history)
{
if (!this.SearchHistorys.Contains(history))
{
this.Search(history.Text);
return;
}
history.Order = this.SearchHistorys.Max(_p => _p.Order) + 1;
ResultPage newpage = new ResultPage(1, history.Text, this.NewWebCrawlers());
ViewHelper.ShowPage(newpage);
newpage.Start();
this.SearchPageVisibility = Visibility.Hidden;
this.MainPageVisibility = Visibility.Visible;
Task.Factory.StartNew(this.SaveHostory);
}