private void BuildTiles()
{
if (RowDefinitions.Any())
{
RowDefinitions.Clear();
}
BuildColumns();
Children.Clear();
var tiles = ItemsSource;
if (tiles != null)
{
var numberOfRows = Math.Ceiling(tiles.Count / (float)MaxColumns);
for (var i = 0; i < numberOfRows; i++)
{
RowDefinitions.Add(new RowDefinition { Height = 200f });
}
for (var index = 0; index < tiles.Count; index++)
{
var column = index % MaxColumns;
var row = (int)Math.Floor(index / (float)MaxColumns);
var tile = BuildTile(tiles[index]);
Children.Add(tile, column, row);
}
}
}
public async Task BuildTiles <T>(IEnumerable <T> tiles)
{
// Wipe out the previous row definitions if they're there.
if (RowDefinitions.Any())
{
RowDefinitions.Clear();
}
var enumerable = tiles as IList <T> ?? tiles.ToList();
var numberOfRows = Math.Ceiling(enumerable.Count / (float)MaxColumns);
for (var i = 0; i < numberOfRows; i++)
{
RowDefinitions.Add(new RowDefinition {
Height = TileHeight
});
}
for (var index = 0; index < enumerable.Count; index++)
{
var column = index % MaxColumns;
var row = (int)Math.Floor(index / (float)MaxColumns);
var tile = await BuildTile(enumerable[index]);
Children.Add(tile, column, row);
}
}
public async Task BuildTiles(IEnumerable tiles)
{
// Wipe out the previous row definitions if they're there.
if (RowDefinitions.Any())
{
RowDefinitions.Clear();
}
Children.Clear();
if (tiles == null)
{
return;
}
var enumerable = tiles as IList ?? tiles.Cast <object>().ToArray();
var numberOfRows = Math.Ceiling(enumerable.Count / (float)MaxColumns);
HeightRequest = TileHeight * numberOfRows;
InvalidateLayout();
for (var i = 0; i < numberOfRows; i++)
{
RowDefinitions.Add(new RowDefinition {
Height = TileHeight
});
}
int ItemCount = enumerable.Count;
int size = (int)numberOfRows * MaxColumns;
for (var index = 0; index < size; index++)
{
var column = index % MaxColumns;
var row = (int)Math.Floor(index / (float)MaxColumns);
if (index < ItemCount)
{
var tile = await BuildTile(enumerable[index]);
Children.Add(tile, column, row);
}
else
{
var tile = await BuildEmptyTile();
Children.Add(tile, column, row);
}
}
}
protected override Size ArrangeOverride(Size _arrangeSize)
{
foreach (var child in Children.OfType<Expander>().Where(_expander => !_expander.IsExpanded))
{
if (child.ExpandDirection == ExpandDirection.Down || child.ExpandDirection == ExpandDirection.Up)
{
var row = GetRow(child);
if (!RowDefinitions.Any())
continue;
RowDefinitions[row].Height = new GridLength(0, GridUnitType.Auto);
}
else
{
var column = GetColumn(child);
if (!ColumnDefinitions.Any())
continue;
ColumnDefinitions[column].Width = new GridLength(0, GridUnitType.Auto);
}
}
return base.ArrangeOverride(_arrangeSize);
}