private static void UpdateToolStripItem(ToolStripItem item, PredicateItem selection)
{
var builder = item as IPredicateBuilder;
item.Enabled = (selection != null) &&
((builder == null) || selection.CanAdd(builder.CreatePredicate(false)));
var dropDown = item as ToolStripDropDownItem;
if (dropDown != null)
{
foreach (ToolStripItem x in dropDown.DropDownItems)
{
UpdateToolStripItem(x, selection);
}
}
}
/// <summary>Renders CONTAINS predicate as compatible LIKE predicate.</summary>
/// <param name="contains">Contains predicate.</param>
/// <param name="dbms">Target DBMS.</param>
/// <param name="output">StringBuilder to which SQL is appended.</param>
/// <param name="parameters">SQL parameter collection to which the object's and its children's
/// parameters are added. After the rendering is done the collection contains all parameters with unique names.</param>
public void Render(ContainsPredicate contains, DbmsType dbms, StringBuilder output, DbParameterCollection parameters)
{
output.Append("(");
contains.PredicateItems[0].Render(dbms, output, parameters);
if (contains.Negate)
output.Append(" NOT LIKE ");
else
output.Append(" LIKE ");
IDbColumn field = (IDbColumn)contains.PredicateItems[0].Item;
string pattern = (string)(contains.PredicateItems[1].Item as DbParameter).Value;
pattern = "%" + pattern + "%";
PredicateItem parametrizedPattern = new PredicateItem(pattern, DbType.String, field.MaxLengthIfText, field.GetPrefixedAlias());
parametrizedPattern.Render(dbms, output, parameters);
output.Append(")");
}
public void Render(ContainsPredicate contains, DbmsType dbms, StringBuilder output, DbParameterCollection parameters)
{
output.Append("(");
if (contains.Negate)
output.Append("NOT CONTAINS(");
else
output.Append("CONTAINS(");
contains.PredicateItems[0].Render(dbms, output, parameters);
output.Append(", ");
IDbColumn field = (IDbColumn)contains.PredicateItems[0].Item;
string term = (string)(contains.PredicateItems[1].Item as DbParameter).Value;
if (contains.TermType == ContainsTermType.PrefixTerm)
term = '"' + term + '"';
else
term = '"' + term + "*\"";
PredicateItem parametrizedTerm = new PredicateItem(term, DbType.String, field.MaxLengthIfText, field.GetPrefixedAlias());
parametrizedTerm.Render(dbms, output, parameters);
output.Append(")");
output.Append(")");
}
/// <summary>
/// Default ctor
/// </summary>
public PredicateEditorForm(ILocPredicate predicate, IRailway railway)
{
this.predicate = predicate;
InitializeComponent();
if (predicate != null)
{
rootNode = predicate.Accept(Default <ItemBuilder> .Instance, railway);
rootNode.Text = "Permissions";
tvItems.Nodes.Add(rootNode);
tvItems.ExpandAll();
// Locs
foreach (var locRef in railway.Locs)
{
ILoc loc;
if (locRef.TryResolve(out loc))
{
var menuItem = new LocEqualsMenuItem(loc, railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddLocs.DropDownItems.Add(menuItem);
}
}
// LocGroups
foreach (var group in railway.LocGroups)
{
var menuItem = new LocGroupEqualsMenuItem(group, railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddLocGroups.DropDownItems.Add(menuItem);
}
// Specials
{
// Change direction
{
var menuItem = new LocCanChangeDirectionMenuItem(railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddSpecial.DropDownItems.Add(menuItem);
}
// Time predicate
{
var menuItem = new LocTimeMenuItem(railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddSpecial.DropDownItems.Add(menuItem);
}
// AND
{
var menuItem = new LocAndMenuItem(railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddSpecial.DropDownItems.Add(menuItem);
}
// OR
{
var menuItem = new LocOrMenuItem(railway);
menuItem.Click += (s, x) => Execute(menuItem);
tbAddSpecial.DropDownItems.Add(menuItem);
}
}
UpdateToolbar();
}
}
/// <summary> /// Remove the given predicate from this node? /// </summary> internal abstract void Remove(PredicateItem child);
/// <summary> /// Can the given predicate be removed from this node? /// </summary> internal abstract bool CanRemove(PredicateItem child);
/// <summary>
/// Remove the given predicate from this node?
/// </summary>
internal override void Remove(PredicateItem child)
{
// Do nothing
}
/// <summary>
/// Can the given predicate be removed from this node?
/// </summary>
internal override bool CanRemove(PredicateItem child)
{
return(false);
}
/// <summary>
/// Remove the given predicate from this node?
/// </summary>
internal override void Remove(PredicateItem child)
{
Nodes.Remove(child);
}