public override bool Equals(object obj)
{
if (obj is SortData)
{
SortData other = obj as SortData;
return(other.Index == Index && other.Order == Order);
}
else
{
return(false);
}
}
private View GetHeaderViewForColumn(DataGridColumn column)
{
column.HeaderLabel.Style = column.HeaderLabelStyle ?? this.HeaderLabelStyle ?? (Style)_headerView.Resources["HeaderDefaultStyle"];
View cell;
if (column.HeaderTemplate != null)
{
cell = new ContentView {
Content = column.HeaderTemplate.CreateContent() as View
};
}
else
{
Grid grid = new Grid
{
ColumnSpacing = 0,
};
if (IsSortable)
{
column.SortingIcon.Style = (Style)_headerView.Resources["ImageStyleBase"];
column.SortingIcon.HorizontalOptions = LayoutOptions.End;
grid.Children.Add(column.SortingIcon);
TapGestureRecognizer tgr = new TapGestureRecognizer();
tgr.Tapped += (s, e) => {
int index = Columns.IndexOf(column);
SortingOrder order = _sortingOrders[index] == SortingOrder.Ascendant ? SortingOrder.Descendant : SortingOrder.Ascendant;
if (Columns.ElementAt(index).SortingEnabled)
{
SortedColumnIndex = new SortData(index, order);
}
};
grid.GestureRecognizers.Add(tgr);
}
grid.Children.Add(column.HeaderLabel);
cell = grid;
}
return(cell);
}
private View GetHeaderViewForColumn(DataGridColumn column)
{
column.HeaderLabel.Style = column.HeaderLabelStyle ?? this.HeaderLabelStyle ?? (Style)_headerView.Resources["HeaderDefaultStyle"];
Grid grid = new Grid {
ColumnSpacing = 0,
};
grid.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Star)
});
grid.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Auto)
});
if (IsSortable)
{
column.SortingIcon.Style = (Style)_headerView.Resources["ImageStyleBase"];
grid.Children.Add(column.SortingIcon);
Grid.SetColumn(column.SortingIcon, 1);
TapGestureRecognizer tgr = new TapGestureRecognizer();
tgr.Tapped += (s, e) => {
int index = Columns.IndexOf(column);
SortingOrder order = _sortingOrders[index] == SortingOrder.Ascendant ? SortingOrder.Descendant : SortingOrder.Ascendant;
if (Columns.ElementAt(index).SortingEnabled)
{
SortedColumnIndex = new SortData(index, order);
}
};
grid.GestureRecognizers.Add(tgr);
}
grid.Children.Add(column.HeaderLabel);
return(grid);
}
private void SortItems(SortData sData)
{
if (InternalItems == null || sData.Index >= Columns.Count || !Columns[sData.Index].SortingEnabled)
{
return;
}
var items = InternalItems;
var column = Columns[sData.Index];
SortingOrder order = sData.Order;
if (!IsSortable)
{
throw new InvalidOperationException("This DataGrid is not sortable");
}
else if (column.PropertyName == null)
{
throw new InvalidOperationException("Please set the PropertyName property of Column");
}
//Sort
if (order == SortingOrder.Descendant)
{
items = items.OrderByDescending(x => ReflectionUtils.GetValueByPath(x, column.PropertyName)).ToList();
}
else
{
items = items.OrderBy(x => ReflectionUtils.GetValueByPath(x, column.PropertyName)).ToList();
}
column.SortingIcon.Style = (order == SortingOrder.Descendant) ?
AscendingIconStyle ?? (Style)_headerView.Resources["DescendingIconStyle"] :
DescendingIconStyle ?? (Style)_headerView.Resources["AscendingIconStyle"];
//Support DescendingIcon property (if setted)
if (!column.SortingIcon.Style.Setters.Any(x => x.Property == Image.SourceProperty))
{
if (order == SortingOrder.Descendant && DescendingIconProperty.DefaultValue != DescendingIcon)
{
column.SortingIcon.Source = DescendingIcon;
}
if (order == SortingOrder.Ascendant && AscendingIconProperty.DefaultValue != AscendingIcon)
{
column.SortingIcon.Source = AscendingIcon;
}
}
for (int i = 0; i < Columns.Count; i++)
{
if (i != sData.Index)
{
if (Columns[i].SortingIcon.Style != null)
{
Columns[i].SortingIcon.Style = null;
}
if (Columns[i].SortingIcon.Source != null)
{
Columns[i].SortingIcon.Source = null;
}
_sortingOrders[i] = SortingOrder.None;
}
}
_internalItems = items;
_sortingOrders[sData.Index] = order;
SortedColumnIndex = sData;
_listView.ItemsSource = _internalItems;
}
