private void NextButton_Click(object sender, RoutedEventArgs e)
{
if (IsTransitionOn)
{
return;
}
IsTransitionOn = true;
PageIndex += 1;
HandleButtonVisibility();
this.CurrentPage = this.slidingPages[PageIndex];
ChangePage(p => Transitor.SlideLeft(p));
}
private void PrevButton_Click(object sender, RoutedEventArgs e)
{
//Skip Prev Transition
if (IsTransitionOn)
{
return;
}
IsTransitionOn = true;
PageIndex -= 1;
HandleButtonVisibility();
this.CurrentPage = this.slidingPages[PageIndex];
ChangePage(p => Transitor.SlideRight(p));
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
var width = this.ActualWidth;
var height = this.ActualHeight;
int hCount = (int)width / 300;
int vCount = (int)height / 150;
ItemsPerPage = hCount * vCount;
ItemSourceValueChange(ItemSource);
HandleButtonVisibility();
ChangePage(p => Transitor.SlideRight(p));
}
private void ItemSourceValueChange(IEnumerable <SlidingItem> items)
{
if (items != null)
{
decimal pageFraction = (decimal)items.Count() / ItemsPerPage;
int pageCount = (int)Math.Ceiling(pageFraction);
if (PageCount <= 0 && pageCount != PageCount)
{
PageCount = pageCount;
for (int i = 1; i <= PageCount; i++)
{
var pageItems = items.Skip((i - 1) * ItemsPerPage).Take(ItemsPerPage).ToList();
slidingPages.Add(new SlidingPage
{
Index = i - 1,
Items = pageItems
});
}
CurrentPage = slidingPages[PageIndex];
}
else if (pageCount > PageCount)
{
PageCount = pageCount;
slidingPages.Add(new SlidingPage
{
Index = PageCount - 1,
Items = items.Skip((PageCount - 1) * ItemsPerPage).Take(ItemsPerPage).ToList()
});
HandleButtonVisibility();
}
else
{
PageCount = pageCount;
bool isRemoved = false;
foreach (var page in slidingPages)
{
var removed = page.Items.Except(items.Select(x => x)).FirstOrDefault();
if (removed != null)
{
isRemoved = true;
slidingPages.Clear();
for (int i = 1; i <= PageCount; i++)
{
var pageItems = items.Skip((i - 1) * ItemsPerPage).Take(ItemsPerPage).ToList();
slidingPages.Add(new SlidingPage
{
Index = i - 1,
Items = pageItems
});
}
PageIndex = PageIndex >= PageCount ? PageIndex - 1 : PageIndex;
CurrentPage = slidingPages[PageIndex];
HandleButtonVisibility();
Transitor.RefreshPage(CurrentPage);
break;
}
}
if (!isRemoved)
{
var slidingPage = slidingPages[PageCount - 1];
slidingPage.Items = items.Skip((PageCount - 1) * ItemsPerPage).Take(ItemsPerPage).ToList();
CurrentPage = slidingPages[PageIndex];
}
}
}
}