Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / Primitives / DataGridRowsPresenter.cs / 1305600 / DataGridRowsPresenter.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Threading; using MS.Internal; namespace System.Windows.Controls.Primitives { ////// Panel that lays out individual rows top to bottom. /// public class DataGridRowsPresenter : VirtualizingStackPanel { #region Scroll Methods ////// Calls the protected method BringIndexIntoView. /// /// The index of the row to scroll into view. ////// BringIndexIntoView should be callable either from the ItemsControl /// or directly on the panel. This was not done in WPF, so we are /// building this internally for the DataGrid. However, if a public /// way of calling BringIndexIntoView becomes a reality, then /// this method is no longer needed. /// internal void InternalBringIndexIntoView(int index) { BringIndexIntoView(index); } ////// This method is invoked when the IsItemsHost property changes. /// /// The old value of the IsItemsHost property. /// The new value of the IsItemsHost property. protected override void OnIsItemsHostChanged(bool oldIsItemsHost, bool newIsItemsHost) { base.OnIsItemsHostChanged(oldIsItemsHost, newIsItemsHost); if (newIsItemsHost) { DataGrid dataGrid = Owner; if (dataGrid != null) { // ItemsHost should be the "root" element which has // IsItemsHost = true on it. In the case of grouping, // IsItemsHost is true on all panels which are generating // content. Thus, we care only about the panel which // is generating content for the ItemsControl. IItemContainerGenerator generator = dataGrid.ItemContainerGenerator as IItemContainerGenerator; if (generator != null && generator == generator.GetItemContainerGeneratorForPanel(this)) { dataGrid.InternalItemsHost = this; } } } else { // No longer the items host, clear out the property on the DataGrid if ((_owner != null) && (_owner.InternalItemsHost == this)) { _owner.InternalItemsHost = null; } _owner = null; } } ////// Override of ViewportSizeChanged method which enqueues a dispatcher operation to redistribute /// the width among columns. /// /// viewport size before the change /// viewport size after the change protected override void OnViewportSizeChanged(Size oldViewportSize, Size newViewportSize) { DataGrid dataGrid = Owner; if (dataGrid != null) { ScrollContentPresenter scrollContentPresenter = dataGrid.InternalScrollContentPresenter; if (scrollContentPresenter == null || scrollContentPresenter.CanContentScroll) { dataGrid.OnViewportSizeChanged(oldViewportSize, newViewportSize); } } } #endregion #region Column Virtualization ////// Measure /// protected override Size MeasureOverride(Size constraint) { _availableSize = constraint; return base.MeasureOverride(constraint); } ////// Property which returns the last measure input size /// internal Size AvailableSize { get { return _availableSize; } } #endregion #region Row Virtualization ////// Override method to suppress the cleanup of rows /// with validation errors. /// /// protected override void OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs e) { base.OnCleanUpVirtualizedItem(e); if (e.UIElement != null && Validation.GetHasError(e.UIElement)) { e.Cancel = true; } } #endregion #region Helpers internal DataGrid Owner { get { if (_owner == null) { _owner = ItemsControl.GetItemsOwner(this) as DataGrid; } return _owner; } } #endregion #region Data private DataGrid _owner; private Size _availableSize; #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Threading; using MS.Internal; namespace System.Windows.Controls.Primitives { ////// Panel that lays out individual rows top to bottom. /// public class DataGridRowsPresenter : VirtualizingStackPanel { #region Scroll Methods ////// Calls the protected method BringIndexIntoView. /// /// The index of the row to scroll into view. ////// BringIndexIntoView should be callable either from the ItemsControl /// or directly on the panel. This was not done in WPF, so we are /// building this internally for the DataGrid. However, if a public /// way of calling BringIndexIntoView becomes a reality, then /// this method is no longer needed. /// internal void InternalBringIndexIntoView(int index) { BringIndexIntoView(index); } ////// This method is invoked when the IsItemsHost property changes. /// /// The old value of the IsItemsHost property. /// The new value of the IsItemsHost property. protected override void OnIsItemsHostChanged(bool oldIsItemsHost, bool newIsItemsHost) { base.OnIsItemsHostChanged(oldIsItemsHost, newIsItemsHost); if (newIsItemsHost) { DataGrid dataGrid = Owner; if (dataGrid != null) { // ItemsHost should be the "root" element which has // IsItemsHost = true on it. In the case of grouping, // IsItemsHost is true on all panels which are generating // content. Thus, we care only about the panel which // is generating content for the ItemsControl. IItemContainerGenerator generator = dataGrid.ItemContainerGenerator as IItemContainerGenerator; if (generator != null && generator == generator.GetItemContainerGeneratorForPanel(this)) { dataGrid.InternalItemsHost = this; } } } else { // No longer the items host, clear out the property on the DataGrid if ((_owner != null) && (_owner.InternalItemsHost == this)) { _owner.InternalItemsHost = null; } _owner = null; } } ////// Override of ViewportSizeChanged method which enqueues a dispatcher operation to redistribute /// the width among columns. /// /// viewport size before the change /// viewport size after the change protected override void OnViewportSizeChanged(Size oldViewportSize, Size newViewportSize) { DataGrid dataGrid = Owner; if (dataGrid != null) { ScrollContentPresenter scrollContentPresenter = dataGrid.InternalScrollContentPresenter; if (scrollContentPresenter == null || scrollContentPresenter.CanContentScroll) { dataGrid.OnViewportSizeChanged(oldViewportSize, newViewportSize); } } } #endregion #region Column Virtualization ////// Measure /// protected override Size MeasureOverride(Size constraint) { _availableSize = constraint; return base.MeasureOverride(constraint); } ////// Property which returns the last measure input size /// internal Size AvailableSize { get { return _availableSize; } } #endregion #region Row Virtualization ////// Override method to suppress the cleanup of rows /// with validation errors. /// /// protected override void OnCleanUpVirtualizedItem(CleanUpVirtualizedItemEventArgs e) { base.OnCleanUpVirtualizedItem(e); if (e.UIElement != null && Validation.GetHasError(e.UIElement)) { e.Cancel = true; } } #endregion #region Helpers internal DataGrid Owner { get { if (_owner == null) { _owner = ItemsControl.GetItemsOwner(this) as DataGrid; } return _owner; } } #endregion #region Data private DataGrid _owner; private Size _availableSize; #endregion } } // 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
- XmlComment.cs
- ColumnTypeConverter.cs
- InstanceLockedException.cs
- DataGridViewCellValidatingEventArgs.cs
- KeyedCollection.cs
- SystemTcpConnection.cs
- SimpleHandlerBuildProvider.cs
- ObjectQuery.cs
- ThicknessConverter.cs
- SafeThreadHandle.cs
- PersonalizationProviderCollection.cs
- AutoCompleteStringCollection.cs
- SymbolTable.cs
- Decorator.cs
- FaultCode.cs
- HttpWebResponse.cs
- TypeBuilder.cs
- DataRelationCollection.cs
- QilXmlReader.cs
- ColorConverter.cs
- PropertyGroupDescription.cs
- DataGridViewCellCollection.cs
- ProfileModule.cs
- CultureInfoConverter.cs
- NestPullup.cs
- SafeReadContext.cs
- RegionInfo.cs
- ProviderCollection.cs
- BasicBrowserDialog.cs
- DeferredBinaryDeserializerExtension.cs
- SynchronizedDispatch.cs
- ServicePointManagerElement.cs
- HtmlSelect.cs
- OleDbParameter.cs
- HiddenFieldPageStatePersister.cs
- basenumberconverter.cs
- XmlElement.cs
- EventLogPermission.cs
- IndexedGlyphRun.cs
- AxisAngleRotation3D.cs
- ReachPageContentSerializerAsync.cs
- CommonProperties.cs
- UrlPath.cs
- ObjectConverter.cs
- WebPart.cs
- Int64AnimationUsingKeyFrames.cs
- TrustSection.cs
- FontUnit.cs
- XmlSchemaSequence.cs
- OleDbConnectionFactory.cs
- UserPersonalizationStateInfo.cs
- Array.cs
- SliderAutomationPeer.cs
- TransformValueSerializer.cs
- ClientBuildManagerTypeDescriptionProviderBridge.cs
- GreenMethods.cs
- PersonalizableAttribute.cs
- FilteredAttributeCollection.cs
- SendParametersContent.cs
- Connection.cs
- PixelFormatConverter.cs
- Win32.cs
- SortDescription.cs
- TextEndOfLine.cs
- WorkerRequest.cs
- Expressions.cs
- SoapAttributeAttribute.cs
- EntityDataSourceChangedEventArgs.cs
- XmlParserContext.cs
- DeclarationUpdate.cs
- PageThemeBuildProvider.cs
- SelectionProviderWrapper.cs
- XomlCompilerParameters.cs
- CodeNamespaceImportCollection.cs
- FormsAuthenticationEventArgs.cs
- DesignerCategoryAttribute.cs
- TypeUsage.cs
- ConfigErrorGlyph.cs
- SyntaxCheck.cs
- XmlDataSourceNodeDescriptor.cs
- ResXResourceWriter.cs
- XmlSchemaSimpleTypeRestriction.cs
- GroupBoxRenderer.cs
- RangeValidator.cs
- RequestBringIntoViewEventArgs.cs
- SaveFileDialog.cs
- AnonymousIdentificationModule.cs
- UIPropertyMetadata.cs
- SubclassTypeValidatorAttribute.cs
- XPathSingletonIterator.cs
- FtpCachePolicyElement.cs
- DrawingAttributes.cs
- ButtonChrome.cs
- IListConverters.cs
- DataGridViewCellLinkedList.cs
- SecurityCriticalDataForSet.cs
- CompiledELinqQueryState.cs
- TextTrailingWordEllipsis.cs
- SkipStoryboardToFill.cs
- filewebresponse.cs