/// <summary>
/// Initializes the dictionaries for properties and child objects
/// and calls the main <c>Initialize</c> method to add the actual
/// properties and child objects.
/// </summary>
private void Init()
{
properties = new Dictionary <string, DataProperty>();
childObjects = new Dictionary <string, DataObject>();
actions = new Dictionary <string, ActionProperty>();
// add save action, and make it enabled only when the object is modified or doesn't track modifications
SaveAction = new ActionProperty(this, Messages.Action_Save);
Expression <Func <DataObject, bool> > saveEnabled = (obj) => obj != null && (obj.Modified || !obj.TrackModifications);
SaveAction.SetComputedEnabled(saveEnabled, this);
// add delete action, and make it enabled only when the object is not new
DeleteAction = new ActionProperty(this, Messages.Action_Delete);
Expression <Func <DataObject, bool> > deleteEnabled = (obj) => obj != null && !obj.IsNew;
DeleteAction.SetComputedEnabled(deleteEnabled, this);
ResetAction = new ActionProperty(this, Messages.Action_Reset);
// call subclass initialization in a separate method
// to make sure base initialization is always called
Initialize();
OnInitialized();
}
/// <summary>
/// Additional initialization after all properties are constructed
/// </summary>
protected override void OnInitialized()
{
base.OnInitialized();
SearchAction = new ActionProperty(this, Messages.Action_Search);
SelectAction = new ActionProperty(this, Messages.Action_Select);
Expression <Func <DataListObject, bool> > xSel = lst => lst.SelectedRows.Any();
SelectAction.SetComputedEnabled(xSel, this);
foreach (DataProperty p in Properties)
{
p.Column = ColumnCount++;
}
data.CollectionChanged += (s, e) =>
{
FireCollectionChange(e);
if (e.Action == NotifyCollectionChangedAction.Reset ||
e.OldItems != null && e.OldItems.Cast <DataRow>().Any(r => r.Selected) ||
e.NewItems.Cast <DataRow>().Any(r => r.Selected))
{
FireSelectionChanged();
}
};
}
/// <summary>
/// Adds the specified action to the data object.
/// </summary>
/// <param name="action">The action to add to the data object.</param>
internal void AddAction(ActionProperty action)
{
actions[action.Name] = action;
}