internal override void OnEditCanceled(DataGridItemEventArgs e)
{
object item = e.Item;
DataGridPageManagerBase pageManager = this.RootGroup.GetVirtualPageManager();
// Compare cached values with current values. If they are the same, we can clear the old values which in turn will
// make the item non dirty.
bool clearIsDirty = true;
VirtualizedItemValueCollection cachedValues = pageManager.GetCachedValuesForItem(item);
Debug.Assert(cachedValues != null);
DataGridItemPropertyCollection itemProperties = this.ItemProperties;
foreach (DataGridItemPropertyBase itemProperty in itemProperties)
{
object currentValue = itemProperty.GetValue(item);
if (!(object.Equals(currentValue, cachedValues[itemProperty.Name])))
{
clearIsDirty = false;
break;
}
}
if (clearIsDirty)
{
pageManager.ClearCachedValuesForItem(item);
}
base.OnEditCanceled(e);
}
internal override void OnEditBegun(DataGridItemEventArgs e)
{
object item = e.Item;
DataGridPageManagerBase pageManager = this.RootGroup.GetVirtualPageManager();
if (!pageManager.IsItemDirty(item))
{
// First time we enter edit on this item.
DataGridItemPropertyCollection itemProperties = this.ItemProperties;
int count = itemProperties.Count;
string[] propertyNames = new string[count];
object[] cachedValues = new object[count];
for (int i = 0; i < count; i++)
{
DataGridItemPropertyBase itemProperty = itemProperties[i];
propertyNames[i] = itemProperty.Name;
cachedValues[i] = itemProperty.GetValue(item);
}
// Cache the values of the never edited before row. This will help the developer find the corresponding row
// in the source when times comes to commit the changes to the data source.
pageManager.SetCachedValuesForItem(item, propertyNames, cachedValues);
}
base.OnEditBegun(e);
}
internal ItemPropertyNameMap(DataGridItemPropertyCollection itemProperties)
{
if (itemProperties == null)
{
throw new ArgumentNullException("itemProperties");
}
m_dataGridItemPropertyCollection = new WeakReference(itemProperties);
CollectionChangedEventManager.AddListener(itemProperties, this);
}
public static void RemoveListener(DataGridItemPropertyCollection source, IWeakEventListener listener)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (listener == null)
{
throw new ArgumentNullException("listener");
}
CurrentManager.ProtectedRemoveListener(source, listener);
}
internal override void SetUnspecifiedPropertiesValues(DataGridItemPropertyCollection itemPropertyCollection)
{
if (this.DataType == null)
{
throw new InvalidOperationException("An attempt was made to add an item without specifying its data type.");
}
if (string.IsNullOrEmpty(this.Title))
{
this.Title = this.Name;
}
if (!this.OverrideReadOnlyForInsertion.HasValue)
{
this.OverrideReadOnlyForInsertion = false;
}
}
protected DataGridDetailDescription()
{
m_detailDescriptions = new DataGridDetailDescriptionCollection();
m_detailDescriptions.CollectionChanged += this.OnDetailDescriptionsCollectionChanged;
m_itemProperties = new DataGridItemPropertyCollection();
m_itemProperties.CollectionChanged += this.OnItemPropertiesCollectionChanged;
m_groupDescriptions = new GroupDescriptionCollection();
m_sortDescriptions = new DataGridSortDescriptionCollection();
m_statFunctions = new StatFunctionCollection();
m_autoFilterValues = new Nequeo.Wpf.Collections.ReadOnlyDictionary <string, IList>();
m_autoFilteredItems = new ObservableCollection <DataGridItemPropertyBase>();
m_registeredFieldNamesToAutoFilterValues = new Dictionary <string, INotifyCollectionChanged>();
m_registeredAutoFilterValuesToFieldNames = new Dictionary <INotifyCollectionChanged, string>();
this.AutoCreateDetailDescriptions = true;
this.AutoCreateItemProperties = true;
this.DefaultCalculateDistinctValues = true;
}
protected override void StopListening(object source)
{
DataGridItemPropertyCollection itemProperties = source as DataGridItemPropertyCollection;
itemProperties.CollectionChanged -= new NotifyCollectionChangedEventHandler(ItemProperties_CollectionChanged);
}
public static void RemoveListener(DataGridItemPropertyCollection source, IWeakEventListener listener)
{
CurrentManager.ProtectedRemoveListener(source, listener);
}
internal virtual void ApplyExtraPropertiesToView(DataGridCollectionViewBase currentView)
{
DataGridItemPropertyCollection currentViewItemProperties = currentView.ItemProperties;
int count = m_itemProperties.Count;
for (int i = 0; i < count; i++)
{
DataGridItemPropertyBase itemProperty = m_itemProperties[i];
int index = currentViewItemProperties.IndexOf(itemProperty.Name);
if (index == -1)
{
currentViewItemProperties.Add(itemProperty);
}
else
{
currentViewItemProperties[index] = itemProperty;
}
}
count = currentView.ItemProperties.Count;
bool defaultCalculateDistinctValues = this.DefaultCalculateDistinctValues;
for (int i = 0; i < count; i++)
{
DataGridItemPropertyBase dataGridItemProperty = currentView.ItemProperties[i];
// Set default value for CalculateDistinctValues if not explicitly set
if (!dataGridItemProperty.IsCalculateDistinctValuesInitialized)
{
dataGridItemProperty.CalculateDistinctValues = defaultCalculateDistinctValues;
}
}
count = m_dataGridDetailDescriptions.Count;
bool autoCreateForeignKeyDescriptions = this.AutoCreateForeignKeyDescriptions;
DataGridDetailDescriptionCollection currentViewDetailDescriptions =
currentView.DetailDescriptions;
for (int i = 0; i < count; i++)
{
DataGridDetailDescription detailDescription = m_dataGridDetailDescriptions[i];
int index = currentViewDetailDescriptions.IndexOf(detailDescription.RelationName);
if (index == -1)
{
currentViewDetailDescriptions.Add(detailDescription);
}
else
{
currentViewDetailDescriptions[index] = detailDescription;
}
// We assume we want to auto-create ForeignKeyDescriptions for DetailDescriptions
// if this.AutoCreateForeignKeyDescriptions is true and it was auto-created
if (detailDescription.IsAutoCreated)
{
detailDescription.AutoCreateForeignKeyDescriptions = autoCreateForeignKeyDescriptions;
}
}
currentView.AutoFilterMode = this.AutoFilterMode;
currentView.DistinctValuesConstraint = this.DistinctValuesConstraint;
currentView.DistinctValuesUpdateMode = this.DistinctValuesUpdateMode;
currentView.FilterCriteriaMode = this.FilterCriteriaMode;
}
internal virtual void SetUnspecifiedPropertiesValues(DataGridItemPropertyCollection itemPropertyCollection)
{
}
// If a DataGridCollectionViewBase is used, get the ItemProperties it defines to be able to retreive DataGridForeignKeyDescription for each of them
// to get the auto-detected ForeignKey ItemsSource (if any).
// If a DataGridCollectionViewBase is not used, the ItemsSource must be manually specified on each Column in order to correctly display/edit the Data
internal static void UpdateColumnsForeignKeyConfigurationsFromDataGridCollectionView(Dictionary <string, ColumnBase> columns, DataGridItemPropertyCollection itemProperties,
bool autoCreateForeignKeyConfigurations)
{
if (itemProperties == null)
{
return;
}
foreach (DataGridItemPropertyBase itemProperty in itemProperties)
{
DataGridForeignKeyDescription description = itemProperty.ForeignKeyDescription;
if (description == null)
{
continue;
}
ColumnBase column;
columns.TryGetValue(itemProperty.Name, out column);
ForeignKeyConfiguration.SynchronizeForeignKeyConfigurationFromForeignKeyDescription(column as Column, description, autoCreateForeignKeyConfigurations);
}
}
private Expression GetAutoFilterValuesExpression(IQueryable queryable, ParameterExpression sharedParameterExpression)
{
if (queryable == null)
{
throw new ArgumentNullException("queryable");
}
AutoFilterMode autoFilterMode = m_parentCollectionView.AutoFilterMode;
if (autoFilterMode == AutoFilterMode.None)
{
return(null);
}
DataGridItemPropertyCollection itemProperties = m_parentCollectionView.ItemProperties;
int itemPropertiesCount = itemProperties.Count;
Expression autoFilterValuesExpression = null;
for (int i = 0; i < itemPropertiesCount; i++)
{
DataGridItemPropertyBase itemProperty = itemProperties[i];
string itemPropertyName = itemProperty.Name;
IList itemPropertyAutoFilterValues;
if (m_parentCollectionView.AutoFilterValues.TryGetValue(itemPropertyName, out itemPropertyAutoFilterValues))
{
int itemPropertyAutoFilterValuesCount = itemPropertyAutoFilterValues.Count;
if (itemPropertyAutoFilterValuesCount == 0)
{
continue;
}
object[] itemPropertyAutoFilterValuesArray = new object[itemPropertyAutoFilterValuesCount];
itemPropertyAutoFilterValues.CopyTo(itemPropertyAutoFilterValuesArray, 0);
Expression itemPropertyAutoFilterExpression = queryable.CreateEqualExpression(sharedParameterExpression, itemPropertyName, itemPropertyAutoFilterValuesArray);
if (autoFilterValuesExpression == null)
{
autoFilterValuesExpression = itemPropertyAutoFilterExpression;
}
else
{
Debug.Assert((autoFilterMode == AutoFilterMode.And) || (autoFilterMode == AutoFilterMode.Or));
// Merge this DataGridItemProperty AutoFilterExpressions
if (autoFilterMode == AutoFilterMode.And)
{
autoFilterValuesExpression = Expression.And(autoFilterValuesExpression, itemPropertyAutoFilterExpression);
}
else
{
autoFilterValuesExpression = Expression.Or(autoFilterValuesExpression, itemPropertyAutoFilterExpression);
}
}
}
// Loop to next DataGridItemProperty.
}
return(autoFilterValuesExpression);
}
private Expression GetFilterCriterionsExpression(IQueryable queryable, ParameterExpression sharedParameterExpression)
{
if (queryable == null)
{
throw new ArgumentNullException("queryable");
}
FilterCriteriaMode filterCriteriaMode = m_parentCollectionView.FilterCriteriaMode;
if (filterCriteriaMode == FilterCriteriaMode.None)
{
return(null);
}
DataGridItemPropertyCollection itemProperties = m_parentCollectionView.ItemProperties;
int itemPropertiesCount = itemProperties.Count;
Expression filterCriterionsExpression = null;
for (int i = 0; i < itemPropertiesCount; i++)
{
DataGridItemPropertyBase itemProperty = itemProperties[i];
string itemPropertyName = itemProperty.Name;
FilterCriterion filterCriterion = itemProperty.FilterCriterion;
if (filterCriterion == null)
{
continue;
}
Expression propertyFilterCriterionExpression = filterCriterion.ToLinqExpression(queryable, sharedParameterExpression, itemPropertyName);
if (propertyFilterCriterionExpression == null)
{
continue;
}
if (filterCriterionsExpression == null)
{
filterCriterionsExpression = propertyFilterCriterionExpression;
}
else
{
Debug.Assert((filterCriteriaMode == FilterCriteriaMode.And) || (filterCriteriaMode == FilterCriteriaMode.Or));
// Merge this DataGridItemProperty FilterCriterionExpressions
if (filterCriteriaMode == FilterCriteriaMode.And)
{
filterCriterionsExpression = Expression.And(filterCriterionsExpression, propertyFilterCriterionExpression);
}
else
{
filterCriterionsExpression = Expression.Or(filterCriterionsExpression, propertyFilterCriterionExpression);
}
}
// Loop to next DataGridItemProperty.
}
return(filterCriterionsExpression);
}
public int Compare(RawItem xRawItem, RawItem yRawItem)
{
if (xRawItem == null)
{
if (yRawItem == null)
{
return(0);
}
else
{
return(-1);
}
}
else
{
if (yRawItem == null)
{
return(1);
}
}
ListSortDirection lastSortDirection = ListSortDirection.Ascending;
SortDescriptionCollection sortDescriptions = m_collectionView.SortDescriptions;
int sortDescriptionCount = sortDescriptions.Count;
if (sortDescriptionCount > 0)
{
int result;
DataGridItemPropertyCollection itemProperties = m_collectionView.ItemProperties;
for (int i = 0; i < sortDescriptionCount; i++)
{
SortDescription sortDescription = sortDescriptions[i];
lastSortDirection = sortDescription.Direction;
DataGridItemPropertyBase dataProperty = itemProperties[sortDescription.PropertyName];
if (dataProperty == null)
{
continue;
}
ISupportInitialize supportInitialize = dataProperty as ISupportInitialize;
object xData = null;
object yData = null;
if (supportInitialize != null)
{
supportInitialize.BeginInit();
}
try
{
xData = dataProperty.GetValue(xRawItem.DataItem);
yData = dataProperty.GetValue(yRawItem.DataItem);
}
finally
{
if (supportInitialize != null)
{
supportInitialize.EndInit();
}
}
IComparer sortComparer = dataProperty.SortComparer;
if (sortComparer != null)
{
result = sortComparer.Compare(xData, yData);
}
else
{
result = ObjectDataStore.CompareData(xData, yData);
}
if (result != 0)
{
if (lastSortDirection == ListSortDirection.Descending)
{
result = -result;
}
return(result);
}
}
}
if (lastSortDirection == ListSortDirection.Descending)
{
return(yRawItem.Index - xRawItem.Index);
}
return(xRawItem.Index - yRawItem.Index);
}
internal override void SetUnspecifiedPropertiesValues(DataGridItemPropertyCollection itemPropertyCollection)
{
// ContainingCollection.ItemType and ContainingCollection.DefaultItemProperties can be null at first when this is
// the ItemProperties of a DetailGrid.
// the SetUnspecifiedPropertiesValues will be recall when both this.ItemType and this.DefaultItemProperties are affected.
if (itemPropertyCollection == null)
{
return;
}
DataGridItemProperty defaultItemProperty = null;
bool itemIsNequeoDataRow = (itemPropertyCollection.ItemType != null) ? typeof(DataRow).IsAssignableFrom(itemPropertyCollection.ItemType) : false;
if ((string.IsNullOrEmpty(this.ValueXPath)) &&
(string.IsNullOrEmpty(this.ValuePath)) &&
(this.PropertyDescriptor == null))
{
if (itemIsNequeoDataRow)
{
this.PropertyDescriptor = new UnboundDataRowPropertyDescriptor(this.Name, this.DataType);
}
else
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
if (defaultItemProperty == null)
{
if (this.Name == ".")
{
this.SetPropertyDescriptor(new SelfPropertyDescriptor(this.DataType));
this.SetValuePath(".");
this.SetIsReadOnly(true);
this.SetOverrideReadOnlyForInsertion(false);
}
else if (itemPropertyCollection.DefaultItemProperties != null)
{
// I have to add this particular exception case to make sure that when the ItemProperty is "re-normalized" when the first DataGridCollectionView
// is created for it, then the ValuePath is still null or empty (allowing it to be re-normalized)
this.SetValuePath(this.Name);
}
}
else
{
this.SetPropertyDescriptor(defaultItemProperty.PropertyDescriptor);
this.SetValuePath(defaultItemProperty.ValuePath);
this.SetValueXPath(defaultItemProperty.ValueXPath);
}
}
}
if (this.DataType == null)
{
//only try to affect the DataType if the DefaultItemProperties were set. (will not be the case when XAML parsing DetailDescriptions)
if (itemPropertyCollection.DefaultItemProperties != null)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty == null)
{
throw new InvalidOperationException("An attempt was made to add an item (" + this.Name + ") without specifying its data type.");
}
this.SetDataType(defaultItemProperty.DataType);
}
}
if (string.IsNullOrEmpty(this.Title))
{
if (itemIsNequeoDataRow)
{
this.Title = this.Name;
}
else
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty == null)
{
this.Title = this.Name;
}
else
{
this.Title = defaultItemProperty.Title;
}
}
}
if (!this.IsReadOnly)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty != null)
{
this.SetIsReadOnly(defaultItemProperty.IsReadOnly);
}
}
if (this.OverrideReadOnlyForInsertion == null)
{
//only try to affect the DataType if the DefaultItemProperties were set. (will not be the case when XAML parsing DetailDescriptions)
if (itemPropertyCollection.DefaultItemProperties != null)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
this.SetOverrideReadOnlyForInsertion((defaultItemProperty != null) && (defaultItemProperty.OverrideReadOnlyForInsertion.HasValue)
? defaultItemProperty.OverrideReadOnlyForInsertion.Value
: false);
}
}
if ((!string.IsNullOrEmpty(this.ValueXPath)) && (string.IsNullOrEmpty(this.ValuePath)))
{
this.SetValuePath("InnerText");
}
bool foreignKeyDescriptionIsNull = (this.ForeignKeyDescription == null);
bool foreignKeyDescriptionItemsSourceIsNull = false;
if (!foreignKeyDescriptionIsNull)
{
foreignKeyDescriptionItemsSourceIsNull = (this.ForeignKeyDescription.ItemsSource == null);
}
// Update the ForeignKeyDescription if not set
if (foreignKeyDescriptionIsNull || foreignKeyDescriptionItemsSourceIsNull)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if ((defaultItemProperty != null) && (defaultItemProperty.ForeignKeyDescription != null))
{
if (foreignKeyDescriptionIsNull)
{
this.SetForeignKeyDescription(defaultItemProperty.ForeignKeyDescription);
}
else
{
if (foreignKeyDescriptionItemsSourceIsNull)
{
this.ForeignKeyDescription.ItemsSource = defaultItemProperty.ForeignKeyDescription.ItemsSource;
}
}
}
}
}