public void LoadCategory(int index)
{
VirtPanel.ClearItems();
if (_currentCategory == RecentsCategoryIndex)
{
UnloadRecents();
}
if (index == RecentsCategoryIndex)
{
LoadRecents();
return;
}
List <VListItemBase> sprites = null;
switch (index)
{
case 0:
sprites = _category1Sprites;
break;
case 1:
sprites = _category2Sprites;
break;
case 2:
sprites = _category3Sprites;
break;
case 3:
sprites = _category4Sprites;
break;
case 4:
sprites = _category5Sprites;
break;
}
if (sprites == null)
{
sprites = new List <VListItemBase>();
for (var i = 0; i < EmojiData.SpritesByCategory[index].Length; i++)
{
//var item = new EmojiSpriteItem(index, i);
var item = new EmojiSpriteItem(EmojiData.SpritesByCategory[index][i], index, i);
item.EmojiSelected += OnEmojiSelected;
sprites.Add(item);
}
switch (index)
{
case 0:
_category1Sprites = sprites;
break;
case 1:
_category2Sprites = sprites;
break;
case 2:
_category3Sprites = sprites;
break;
case 3:
_category4Sprites = sprites;
break;
case 4:
_category5Sprites = sprites;
break;
}
}
CurrentCategory = index;
VirtPanel.AddItems(new List <VListItemBase> {
sprites[0]
});
CreateButtonsBackgrounds(index);
if (!_wasRendered)
{
// Display LoadingProgressBar only once
LoadingProgressBar.Visibility = Visibility.Collapsed;
_wasRendered = true;
}
// Delayed rendering of the rest parts - speeds up initial load
ThreadPool.QueueUserWorkItem(state =>
{
Thread.Sleep(100);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
if (_currentCategory != index)
{
return;
}
var listList = sprites.ToList();
listList.RemoveAt(0);
VirtPanel.AddItems(listList);
});
});
}
/// <summary>
/// Clear current highlight on scroll
/// </summary>
private static void VirtPanelOnScrollPositionChanged(object sender, MyVirtualizingPanel.ScrollPositionChangedEventAgrs scrollPositionChangedEventAgrs)
{
EmojiSpriteItem.ClearCurrentHighlight();
}