public async Task SetChecked(bool value)
{
if (!Column.HeaderCheckbox)
{
return;
}
var oldValue = _allChecked;
_allChecked = value;
var allItemsDisplayed = GridComponent.Grid.ItemsCount == GridComponent.Grid.OriginalItemsCount;
if (allItemsDisplayed)
{
GridComponent.CheckboxesKeyed.AddParameter(Column.Name, new QueryDictionary <(CheckboxComponent <T>, bool)>());
LastHeaderCheckedValue = value;
}
var args = new HeaderCheckboxEventArgs <T>
{
ColumnName = Column.Name,
Value = value ? CheckboxValue.Checked : CheckboxValue.Unchecked,
HeaderValue = value ? CheckboxValue.Checked : CheckboxValue.Unchecked,
};
if (_allChecked != oldValue)
{
await GridComponent.OnHeaderCheckboxChanged(args);
await InvokeAsync(StateHasChanged);
}
}
private async Task RowCheckboxChanged(CheckboxEventArgs <T> e)
{
if (e.ColumnName != Column.Name || !Column.HeaderCheckbox)
{
return;
}
var oldValue = _allChecked;
var checkedCount = GridComponent.CheckboxesKeyed.Get(Column.Name).Values.Count(r => r.Item2);
if (checkedCount > 0 && checkedCount != GridComponent.Grid.Pager.OriginalItemsCount)
{
_allChecked = null;
}
else
{
_allChecked = checkedCount == GridComponent.Grid.Pager.OriginalItemsCount;
LastHeaderCheckedValue = _allChecked == true;
GridComponent.CheckboxesKeyed.AddParameter(Column.Name, new QueryDictionary <(CheckboxComponent <T>, bool)>());
}
if (_allChecked != oldValue)
{
var args = new HeaderCheckboxEventArgs <T>
{
ColumnName = Column.Name,
Value = _allChecked == true ? CheckboxValue.Checked : CheckboxValue.Unchecked,
HeaderValue = _allChecked == null ? CheckboxValue.Gray : (_allChecked == true ? CheckboxValue.Checked : CheckboxValue.Unchecked),
StringKey = e.StringKey,
};
await GridComponent.OnHeaderCheckboxChanged(args);
await InvokeAsync(StateHasChanged);
}
}
