Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DataGridViewCellLinkedList.cs / 1 / DataGridViewCellLinkedList.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Diagnostics; using System.Collections; using System.Windows.Forms; using System.ComponentModel; ////// /// internal class DataGridViewCellLinkedList : IEnumerable { private DataGridViewCellLinkedListElement lastAccessedElement; private DataGridViewCellLinkedListElement headElement; private int count, lastAccessedIndex; ///Represents a linked list of ///objects IEnumerator IEnumerable.GetEnumerator() { return new DataGridViewCellLinkedListEnumerator(this.headElement); } /// public DataGridViewCellLinkedList() { this.lastAccessedIndex = -1; } /// public DataGridViewCell this[int index] { get { Debug.Assert(index >= 0); Debug.Assert(index < this.count); if (this.lastAccessedIndex == -1 || index < this.lastAccessedIndex) { DataGridViewCellLinkedListElement tmp = this.headElement; int tmpIndex = index; while (tmpIndex > 0) { tmp = tmp.Next; tmpIndex--; } this.lastAccessedElement = tmp; this.lastAccessedIndex = index; return tmp.DataGridViewCell; } else { while (this.lastAccessedIndex < index) { this.lastAccessedElement = this.lastAccessedElement.Next; this.lastAccessedIndex++; } return this.lastAccessedElement.DataGridViewCell; } } } /// public int Count { get { return this.count; } } /// public DataGridViewCell HeadCell { get { Debug.Assert(this.headElement != null); return this.headElement.DataGridViewCell; } } /// public void Add(DataGridViewCell dataGridViewCell) { Debug.Assert(dataGridViewCell != null); Debug.Assert(dataGridViewCell.DataGridView.SelectionMode == DataGridViewSelectionMode.CellSelect || dataGridViewCell.DataGridView.SelectionMode == DataGridViewSelectionMode.ColumnHeaderSelect || dataGridViewCell.DataGridView.SelectionMode == DataGridViewSelectionMode.RowHeaderSelect); DataGridViewCellLinkedListElement newHead = new DataGridViewCellLinkedListElement(dataGridViewCell); if (this.headElement != null) { newHead.Next = this.headElement; } this.headElement = newHead; this.count++; this.lastAccessedElement = null; this.lastAccessedIndex = -1; } /// public void Clear() { this.lastAccessedElement = null; this.lastAccessedIndex = -1; this.headElement = null; this.count = 0; } /// public bool Contains(DataGridViewCell dataGridViewCell) { Debug.Assert(dataGridViewCell != null); int index = 0; DataGridViewCellLinkedListElement tmp = this.headElement; while (tmp != null) { if (tmp.DataGridViewCell == dataGridViewCell) { this.lastAccessedElement = tmp; this.lastAccessedIndex = index; return true; } tmp = tmp.Next; index++; } return false; } /// public bool Remove(DataGridViewCell dataGridViewCell) { Debug.Assert(dataGridViewCell != null); DataGridViewCellLinkedListElement tmp1 = null, tmp2 = this.headElement; while (tmp2 != null) { if (tmp2.DataGridViewCell == dataGridViewCell) { break; } tmp1 = tmp2; tmp2 = tmp2.Next; } if (tmp2.DataGridViewCell == dataGridViewCell) { DataGridViewCellLinkedListElement tmp3 = tmp2.Next; if (tmp1 == null) { this.headElement = tmp3; } else { tmp1.Next = tmp3; } this.count--; this.lastAccessedElement = null; this.lastAccessedIndex = -1; return true; } return false; } /* Unused for now /// public DataGridViewCell RemoveHead() { if (this.headElement == null) { return null; } DataGridViewCellLinkedListElement tmp = this.headElement; this.headElement = tmp.Next; this.count--; this.lastAccessedElement = null; this.lastAccessedIndex = -1; return tmp.DataGridViewCell; } */ /// public int RemoveAllCellsAtBand(bool column, int bandIndex) { int removedCount = 0; DataGridViewCellLinkedListElement tmp1 = null, tmp2 = this.headElement; while (tmp2 != null) { if ((column && tmp2.DataGridViewCell.ColumnIndex == bandIndex) || (!column && tmp2.DataGridViewCell.RowIndex == bandIndex)) { DataGridViewCellLinkedListElement tmp3 = tmp2.Next; if (tmp1 == null) { this.headElement = tmp3; } else { tmp1.Next = tmp3; } tmp2 = tmp3; this.count--; this.lastAccessedElement = null; this.lastAccessedIndex = -1; removedCount++; } else { tmp1 = tmp2; tmp2 = tmp2.Next; } } return removedCount; } } /// /// /// internal class DataGridViewCellLinkedListEnumerator : IEnumerator { private DataGridViewCellLinkedListElement headElement; private DataGridViewCellLinkedListElement current; private bool reset; ///Represents an emunerator of elements in a ///linked list. public DataGridViewCellLinkedListEnumerator(DataGridViewCellLinkedListElement headElement) { this.headElement = headElement; this.reset = true; } /// object IEnumerator.Current { get { Debug.Assert(this.current != null); // Since this is for internal use only. return this.current.DataGridViewCell; } } /// bool IEnumerator.MoveNext() { if (this.reset) { Debug.Assert(this.current == null); this.current = this.headElement; this.reset = false; } else { Debug.Assert(this.current != null); // Since this is for internal use only. this.current = this.current.Next; } return (this.current != null); } /// void IEnumerator.Reset() { this.reset = true; this.current = null; } } /// /// /// internal class DataGridViewCellLinkedListElement { private DataGridViewCell dataGridViewCell; private DataGridViewCellLinkedListElement next; ///Represents an element in a ///linked list. public DataGridViewCellLinkedListElement(DataGridViewCell dataGridViewCell) { Debug.Assert(dataGridViewCell != null); this.dataGridViewCell = dataGridViewCell; } /// public DataGridViewCell DataGridViewCell { get { return this.dataGridViewCell; } } /// public DataGridViewCellLinkedListElement Next { get { return this.next; } set { this.next = value; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodePageUtils.cs
- PropertyChangeTracker.cs
- DataServiceHostWrapper.cs
- QueryReaderSettings.cs
- ConstructorNeedsTagAttribute.cs
- CloudCollection.cs
- OleDbDataAdapter.cs
- X509IssuerSerialKeyIdentifierClause.cs
- DbConnectionOptions.cs
- SelectionEditingBehavior.cs
- LogWriteRestartAreaAsyncResult.cs
- Base64Stream.cs
- TabletDeviceInfo.cs
- TriggerAction.cs
- DataSourceNameHandler.cs
- HttpResponse.cs
- StrokeIntersection.cs
- Assert.cs
- XmlnsPrefixAttribute.cs
- TransportChannelFactory.cs
- SettingsContext.cs
- InstanceDataCollection.cs
- RelationshipFixer.cs
- ListItemViewControl.cs
- TextureBrush.cs
- MobileFormsAuthentication.cs
- InstanceDescriptor.cs
- CultureSpecificStringDictionary.cs
- GridViewColumn.cs
- PointAnimationBase.cs
- SortKey.cs
- DeviceSpecificChoiceCollection.cs
- HttpValueCollection.cs
- SiteMapNodeItem.cs
- CharacterString.cs
- SimpleTextLine.cs
- XmlnsPrefixAttribute.cs
- ContractAdapter.cs
- FileSystemEventArgs.cs
- Merger.cs
- DataGridViewButtonColumn.cs
- GridViewRowPresenter.cs
- EpmCustomContentDeSerializer.cs
- PropertyValidationContext.cs
- CustomErrorsSectionWrapper.cs
- _ListenerResponseStream.cs
- PersonalizationProviderHelper.cs
- WorkflowServiceHost.cs
- AttributeEmitter.cs
- SweepDirectionValidation.cs
- DesignerActionHeaderItem.cs
- SqlError.cs
- WebBrowserContainer.cs
- ExpressionVisitor.cs
- HttpWebRequestElement.cs
- TransformerInfoCollection.cs
- TableTextElementCollectionInternal.cs
- CachedTypeface.cs
- SqlReferenceCollection.cs
- MetadataItemEmitter.cs
- Soap.cs
- Viewport3DVisual.cs
- httpserverutility.cs
- Transform3D.cs
- TableLayoutRowStyleCollection.cs
- X509Certificate2Collection.cs
- AuthenticationServiceManager.cs
- EventLogRecord.cs
- Constants.cs
- EncoderNLS.cs
- SmtpSpecifiedPickupDirectoryElement.cs
- VirtualPath.cs
- NavigationProperty.cs
- TextBoxBase.cs
- NullToBooleanConverter.cs
- ReferenceSchema.cs
- ReliableChannelFactory.cs
- HtmlControlPersistable.cs
- ObjectSpanRewriter.cs
- QilPatternVisitor.cs
- DataRowChangeEvent.cs
- ViewStateModeByIdAttribute.cs
- NetworkStream.cs
- XmlSchemaExporter.cs
- DataGridViewTextBoxEditingControl.cs
- GACIdentityPermission.cs
- HtmlTernaryTree.cs
- HostingEnvironmentException.cs
- CodeCatchClauseCollection.cs
- Exceptions.cs
- InputScope.cs
- SapiAttributeParser.cs
- ByteStreamGeometryContext.cs
- DropShadowEffect.cs
- FreezableCollection.cs
- UpdateTracker.cs
- SqlNode.cs
- Bold.cs
- MonitoringDescriptionAttribute.cs
- XmlSchemaObjectCollection.cs