//If two IGridBehaviors of the same type match the same
//datasource, only the one added last will be used. To
//do this, I maintain the behaviors set backwards, then
//call Distinct with a custom IEqualityComparer before
//returning matching behaviors. The Distinct() method
//will return the first of each set of duplicates from
//the original. I cannot maintain the uniqueness when
//adding the behaviors because I can't compare selector
//delegates. This allows specific programs to override
//the built-in default schema settings.
//This means that behaviors will be applied in reverse.
//I want behaviors to be completely independent, so I'm
//keeping this behavior. To change it, call .Reverse()
//after .Distinct().
///<summary>Gets the grid behaviors that should be applied to the given datasource.</summary>
public static IEnumerable <IGridBehavior> GetBehaviors(object dataSource)
{
if (dataSource == null)
{
throw new ArgumentNullException("dataSource");
}
UIThread.Verify();
return(behaviors.Where(kvp => kvp.Key(dataSource))
.Select(kvp => kvp.Value)
.Distinct(new TypeComparer <IGridBehavior>()));
}
///<summary>Registers an IEditorSettings preset for a column in a Singularity schema.</summary>
public static void Register(Column column, IEditorSettings settings)
{
if (column == null)
{
throw new ArgumentNullException("column");
}
if (settings == null)
{
throw new ArgumentNullException("settings");
}
UIThread.Verify();
dictionary.Add(column, settings);
}
///<summary>Registers an IGridBehavior for matching datasources.</summary>
///<param name="selector">A delegate that determines which datasources the behavior should be applied to.</param>
///<param name="behavior">The IGridBehavior instance.</param>
public static void RegisterBehavior(Func <object, bool> selector, IGridBehavior behavior)
{
if (selector == null)
{
throw new ArgumentNullException("selector");
}
if (behavior == null)
{
throw new ArgumentNullException("behavior");
}
UIThread.Verify();
behaviors.AddFirst(new KeyValuePair <Func <object, bool>, IGridBehavior>(selector, behavior));
}
///<summary>Gets an IEditorSettings to use for the given column, or null if there is no preset for that column.</summary>
public static IEditorSettings GetSettings(object dataSource, string columnName)
{
UIThread.Verify();
var schema = TableSchema.GetSchema(dataSource);
if (schema == null)
{
return(null);
}
var column = schema.Columns[columnName];
if (column == null)
{
return(null); //eg, unbound columns
}
return(GetSettings(column));
}
