/// <summary>
/// Binds <see cref="Model"/> to <see cref="CheckBox"/> to select current row.
/// </summary>
/// <param name="model">The model of the DataSet.</param>
/// <returns>The row binding object.</returns>
public static RowBinding <CheckBox> BindToCheckBox(this Model model)
{
if (model == null)
{
throw new ArgumentNullException(nameof(model));
}
var trigger = new PropertyChangedTrigger <CheckBox>(CheckBox.IsCheckedProperty).WithAction(v =>
{
var binding = (TwoWayBinding)v.GetBinding();
if (binding.IsRefreshing)
{
return;
}
var isChecked = v.IsChecked;
if (!isChecked.HasValue)
{
return;
}
var isSelected = isChecked.GetValueOrDefault();
var row = v.GetRowPresenter();
row.IsSelected = isSelected;
});
return(new RowBinding <CheckBox>(
onRefresh: (v, p) => v.IsChecked = p.IsSelected,
onSetup: (v, p) => trigger.Attach(v),
onCleanup: (v, p) => trigger.Detach(v)));
}
private static ScalarBinding <T> ToSelectAll <T>(this DataPresenter dataPresenter)
where T : ToggleButton, new()
{
if (dataPresenter == null)
{
throw new ArgumentNullException(nameof(dataPresenter));
}
var trigger = new PropertyChangedTrigger <T>(ToggleButton.IsCheckedProperty).WithAction(v =>
{
var binding = (TwoWayBinding)v.GetBinding();
if (binding.IsRefreshing)
{
return;
}
var isChecked = v.IsChecked;
if (!isChecked.HasValue)
{
return;
}
var isSelected = isChecked.GetValueOrDefault();
var rows = dataPresenter.Rows;
bool anyChange = false;
for (int i = 0; i < rows.Count; i++)
{
var row = rows[i];
var oldValue = row.IsSelected;
row.IsSelected = isSelected;
if (row.IsSelected != oldValue)
{
anyChange = true;
}
}
if (!anyChange)
{
dataPresenter.InvalidateView();
}
});
return(new ScalarBinding <T>(onRefresh: v =>
{
var selectedCount = dataPresenter.SelectedRows.Count;
if (selectedCount == 0)
{
v.IsChecked = false;
}
else if (selectedCount == dataPresenter.Rows.Count - (dataPresenter.VirtualRow != null ? 1 : 0))
{
v.IsChecked = true;
}
else
{
v.IsChecked = null;
}
},
onSetup: v =>
{
trigger.Attach(v);
},
onCleanup: v =>
{
trigger.Detach(v);
}));
}