protected override void RecycleElementCore(ElementFactoryRecycleArgs args)
{
var element = args.Element;
var owner = args.Parent;
var key = (String)(element as FrameworkElement).Tag;
Debug.Assert(key != null);
RecyclePool.PutElement((FrameworkElement)element, key, owner);
#if DEBUG
var containerAsFE = (FrameworkElement)element;
switch (key)
{
case RecipeGroupType:
{
var repeater = (ItemsRepeater)containerAsFE.FindName("groupLayout");
var id = RepeaterTestHooks.GetLayoutId(repeater.Layout);
RepeaterTestHooks.SetLayoutId(repeater.Layout, id + "*");
break;
}
case YearType:
{
var repeater = (ItemsRepeater)containerAsFE.FindName("yearLayout");
var id = RepeaterTestHooks.GetLayoutId(repeater.Layout);
RepeaterTestHooks.SetLayoutId(repeater.Layout, id + "*");
break;
}
}
#endif
}
protected override UIElement GetElementCore(ElementFactoryGetArgs args)
#endif
{
var key = (args.Data is RecipeGroup) ? "Group" : "Recipe";
var element = (FrameworkElement)_recyclePool.TryGetElement(key, args.Parent);
if (element == null)
{
if (args.Data is RecipeGroup)
{
element = (FrameworkElement)_groupTemplate.LoadContent();
_innerRepeaters.Add((ItemsRepeater)element.FindName("groupLayout"));
}
else
{
element = (FrameworkElement)_recipeTemplate.LoadContent();
}
}
element.Tag = key;
if (args.Data is RecipeGroup)
{
var group = (RecipeGroup)args.Data;
var groupName = (TextBlock)element.FindName("groupName");
var repeater = (ItemsRepeater)element.FindName("groupLayout");
groupName.Text = group.Name;
var dataSource = new DelegatingItemsSource(group);
dataSource.KeyFromIndexFunc = _KeyFromIndexFunc;
repeater.ItemsSource = dataSource;
repeater.Layout = IsInnerLayoutGrid ? (VirtualizingLayout) new UniformGridLayout()
{
MinItemWidth = 150, MinItemHeight = 150
} : (VirtualizingLayout) new StackLayout();
RepeaterTestHooks.SetLayoutId(repeater.Layout, group.Name);
repeater.ItemTemplate = this;
repeater.Animator = _animator;
}
else
{
var recipe = (Recipe)args.Data;
var image = (Image)element.FindName("recipeImage");
var description = (TextBlock)element.FindName("recipeDescription");
image.Source = new BitmapImage(recipe.ImageUri);
description.Text = recipe.Description;
}
return(element);
}
public void UpdateInnerLayouts()
{
foreach (var repeater in _innerRepeaters)
{
if (repeater.Layout != null)
{
var id = RepeaterTestHooks.GetLayoutId(repeater.Layout);
repeater.Layout = IsInnerLayoutGrid ? (VirtualizingLayout) new UniformGridLayout()
{
MinItemWidth = 150, MinItemHeight = 150
} : (VirtualizingLayout) new StackLayout();
RepeaterTestHooks.SetLayoutId(repeater.Layout, id);
}
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
_pageInfo = e.ExtraData as PageInfo;
if (_pageInfo != null)
{
int levels = _pageInfo.NumLevels;
var level0Layout = _pageInfo.Level0Layout;
var level1Layout = _pageInfo.Level1Layout;
var level2Layout = _pageInfo.Level2Layout;
var rnd = new Random(12345);
if (_pageInfo.Orientation == Orientation.Horizontal)
{
scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Disabled;
//scrollViewer.VerticalScrollMode = ScrollMode.Disabled;
//scrollViewer.HorizontalScrollMode = ScrollMode.Enabled;
scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Visible;
}
var generator = _pageInfo.Orientation == Orientation.Vertical ?
new RecipeElementFactory(
(DataTemplate)Resources["RecipeTemplate"],
(DataTemplate)Resources["RecipeGroupTemplate"],
(DataTemplate)Resources["YearTemplate"], _pageInfo) :
new RecipeElementFactory(
(DataTemplate)Resources["RecipeTemplateHorizontal"],
(DataTemplate)Resources["RecipeGroupTemplateHorizontal"],
(DataTemplate)Resources["YearTemplateHorizontal"], _pageInfo);
generator.RecyclePool = new RecyclePool();
rootRepeater.ItemTemplate = generator;
rootRepeater.Layout = _pageInfo.Level0Layout;
RepeaterTestHooks.SetLayoutId(rootRepeater.Layout, "Root");
switch (levels)
{
case 0:
_flatData = new ObservableCollection <Recipe>(Enumerable.Range(0, 300).Select(k =>
new Recipe
{
ImageUri = new Uri(string.Format("pack://application:,,,/Images/recipe{0}.png", k % 8 + 1)),
Description = k + " - " + _lorem.Substring(0, level0Layout is StackLayout ? rnd.Next(200, 650) : level0Layout is UniformGridLayout ? 0 : rnd.Next(10, 30))
//Description = k.ToString()
}));
rootRepeater.ItemsSource = _flatData;
break;
case 1:
_oneLevelNestedData = new ObservableCollection <RecipeGroup>(Enumerable.Range(0, 10).Select(j =>
new RecipeGroup(
Enumerable.Range(0, rnd.Next(5, 16)).Select(k =>
new Recipe
{
ImageUri = new Uri(string.Format("pack://application:,,,/Images/recipe{0}.png", k % 8 + 1)),
Description = string.Format("{0}.{1} - {2}", j, k, _lorem.Substring(0, level1Layout is StackLayout ? rnd.Next(200, 650) : level1Layout is UniformGridLayout ? 0 : rnd.Next(10, 30)))
}))
{
Name = "Group #" + j
}));
rootRepeater.ItemsSource = _oneLevelNestedData;
break;
case 2:
_twoLevelNestedData = new ObservableCollection <Year>(Enumerable.Range(0, 3).Select(i => new Year(
new ObservableCollection <RecipeGroup>(Enumerable.Range(0, rnd.Next(2, 5)).Select(j => new RecipeGroup(
Enumerable.Range(0, rnd.Next(5, 16)).Select(k =>
new Recipe
{
ImageUri = new Uri(string.Format("pack://application:,,,/Images/recipe{0}.png", k % 8 + 1)),
Description = string.Format("{0}.{1}.{2} - {3}", 2016 - i, j, k, _lorem.Substring(0, level2Layout is StackLayout ? rnd.Next(200, 650) : level2Layout is UniformGridLayout ? 0 : rnd.Next(10, 30)))
}))
{
Name = "Group #" + j
})))
{
Value = 2016 - i
}));
rootRepeater.ItemsSource = _twoLevelNestedData;
break;
}
}
}
private void PrepareContainer(UIElement container, string containerType, object data)
{
var containerFE = container as FrameworkElement;
switch (containerType)
{
case RecipeContainerType:
{
var recipe = (Recipe)data;
var image = (Image)containerFE.FindName("recipeImage");
var description = (TextBlock)containerFE.FindName("recipeDescription");
if (image.Source == null)
{
image.Source = new BitmapImage(recipe.ImageUri);
}
else
{
((BitmapImage)image.Source).UriSource = recipe.ImageUri;
}
description.Text = recipe.Description;
break;
}
case RecipeGroupType:
{
var group = (RecipeGroup)data;
var groupName = (TextBlock)containerFE.FindName("groupName");
var repeater = (ItemsRepeater)containerFE.FindName("groupLayout");
groupName.Text = group.Name;
repeater.ItemsSource = group;
repeater.Layout = _pageInfo.NumLevels == 1 ? _pageInfo.Level1Layout : _pageInfo.Level2Layout;
#if DEBUG
RepeaterTestHooks.SetLayoutId(repeater.Layout, group.Name);
#endif
repeater.ItemTemplate = this;
break;
}
case YearType:
{
var year = (Year)data;
var yearName = (TextBlock)containerFE.FindName("yearName");
var repeater = (ItemsRepeater)containerFE.FindName("yearLayout");
yearName.Text = year.Value.ToString();
repeater.ItemsSource = year;
repeater.Layout = _pageInfo.Level0Layout;
#if DEBUG
RepeaterTestHooks.SetLayoutId(repeater.Layout, string.Format("Year {0}", year.Value));
#endif
repeater.ItemTemplate = this;
break;
}
}
}
