Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Controls / DataGridColumnFloatingHeader.cs / 1305600 / DataGridColumnFloatingHeader.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Windows; using System.Windows.Controls.Primitives; using System.Windows.Media; using MS.Internal; namespace System.Windows.Controls { ////// The control which would be used to indicate the drag during column header drag-drop /// [TemplatePart(Name = "PART_VisualBrushCanvas", Type = typeof(Canvas))] internal class DataGridColumnFloatingHeader : Control { #region Constructors static DataGridColumnFloatingHeader() { DefaultStyleKeyProperty.OverrideMetadata( typeof(DataGridColumnFloatingHeader), new FrameworkPropertyMetadata(DataGridColumnHeader.ColumnFloatingHeaderStyleKey)); WidthProperty.OverrideMetadata( typeof(DataGridColumnFloatingHeader), new FrameworkPropertyMetadata(new PropertyChangedCallback(OnWidthChanged), new CoerceValueCallback(OnCoerceWidth))); HeightProperty.OverrideMetadata( typeof(DataGridColumnFloatingHeader), new FrameworkPropertyMetadata(new PropertyChangedCallback(OnHeightChanged), new CoerceValueCallback(OnCoerceHeight))); } #endregion #region Static Methods private static void OnWidthChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { DataGridColumnFloatingHeader header = (DataGridColumnFloatingHeader)d; double width = (double)e.NewValue; if (header._visualBrushCanvas != null && !DoubleUtil.IsNaN(width)) { VisualBrush brush = header._visualBrushCanvas.Background as VisualBrush; if (brush != null) { Rect viewBox = brush.Viewbox; brush.Viewbox = new Rect(viewBox.X, viewBox.Y, width - header.GetVisualCanvasMarginX(), viewBox.Height); } } } private static object OnCoerceWidth(DependencyObject d, object baseValue) { double width = (double)baseValue; DataGridColumnFloatingHeader header = (DataGridColumnFloatingHeader)d; if (header._referenceHeader != null && DoubleUtil.IsNaN(width)) { return header._referenceHeader.ActualWidth + header.GetVisualCanvasMarginX(); } return baseValue; } private static void OnHeightChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { DataGridColumnFloatingHeader header = (DataGridColumnFloatingHeader)d; double height = (double)e.NewValue; if (header._visualBrushCanvas != null && !DoubleUtil.IsNaN(height)) { VisualBrush brush = header._visualBrushCanvas.Background as VisualBrush; if (brush != null) { Rect viewBox = brush.Viewbox; brush.Viewbox = new Rect(viewBox.X, viewBox.Y, viewBox.Width, height - header.GetVisualCanvasMarginY()); } } } private static object OnCoerceHeight(DependencyObject d, object baseValue) { double height = (double)baseValue; DataGridColumnFloatingHeader header = (DataGridColumnFloatingHeader)d; if (header._referenceHeader != null && DoubleUtil.IsNaN(height)) { return header._referenceHeader.ActualHeight + header.GetVisualCanvasMarginY(); } return baseValue; } #endregion #region Methods and Properties public override void OnApplyTemplate() { base.OnApplyTemplate(); _visualBrushCanvas = GetTemplateChild(VisualBrushCanvasTemplateName) as Canvas; UpdateVisualBrush(); } internal DataGridColumnHeader ReferenceHeader { get { return _referenceHeader; } set { _referenceHeader = value; } } private void UpdateVisualBrush() { if (_referenceHeader != null && _visualBrushCanvas != null) { VisualBrush visualBrush = new VisualBrush(_referenceHeader); visualBrush.ViewboxUnits = BrushMappingMode.Absolute; double width = Width; if (DoubleUtil.IsNaN(width)) { width = _referenceHeader.ActualWidth; } else { width = width - GetVisualCanvasMarginX(); } double height = Height; if (DoubleUtil.IsNaN(height)) { height = _referenceHeader.ActualHeight; } else { height = height - GetVisualCanvasMarginY(); } Vector offset = VisualTreeHelper.GetOffset(_referenceHeader); visualBrush.Viewbox = new Rect(offset.X, offset.Y, width, height); _visualBrushCanvas.Background = visualBrush; } } internal void ClearHeader() { _referenceHeader = null; if (_visualBrushCanvas != null) { _visualBrushCanvas.Background = null; } } private double GetVisualCanvasMarginX() { double delta = 0; if (_visualBrushCanvas != null) { Thickness margin = _visualBrushCanvas.Margin; delta += margin.Left; delta += margin.Right; } return delta; } private double GetVisualCanvasMarginY() { double delta = 0; if (_visualBrushCanvas != null) { Thickness margin = _visualBrushCanvas.Margin; delta += margin.Top; delta += margin.Bottom; } return delta; } #endregion #region Data private DataGridColumnHeader _referenceHeader; private const string VisualBrushCanvasTemplateName = "PART_VisualBrushCanvas"; private Canvas _visualBrushCanvas; #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
- CustomTrackingRecord.cs
- HtmlShim.cs
- ColorConvertedBitmapExtension.cs
- SqlBooleanMismatchVisitor.cs
- ListBox.cs
- elementinformation.cs
- MobileControlDesigner.cs
- FormViewInsertEventArgs.cs
- SizeAnimationBase.cs
- Config.cs
- CalendarDay.cs
- DataSourceView.cs
- DataControlFieldCell.cs
- OpCellTreeNode.cs
- PropertyGrid.cs
- DataBinding.cs
- RoleManagerSection.cs
- StringUtil.cs
- HyperlinkAutomationPeer.cs
- ProcessModule.cs
- MulticastDelegate.cs
- MappingMetadataHelper.cs
- BamlResourceContent.cs
- Matrix3D.cs
- ToolStripGrip.cs
- RoleBoolean.cs
- TemplateBaseAction.cs
- AssemblyCollection.cs
- ToolboxDataAttribute.cs
- MouseGestureConverter.cs
- ButtonField.cs
- PcmConverter.cs
- DecimalKeyFrameCollection.cs
- PagedDataSource.cs
- DropDownButton.cs
- RunWorkerCompletedEventArgs.cs
- Ray3DHitTestResult.cs
- SystemIPAddressInformation.cs
- StandardToolWindows.cs
- XmlProcessingInstruction.cs
- SQLInt64.cs
- WmlImageAdapter.cs
- CapabilitiesRule.cs
- SchemaMerger.cs
- TypeCodeDomSerializer.cs
- NonVisualControlAttribute.cs
- ContextToken.cs
- XmlSchemaSearchPattern.cs
- ChildTable.cs
- Geometry.cs
- RoleManagerEventArgs.cs
- ImageConverter.cs
- KeyConverter.cs
- DataTemplateSelector.cs
- UnhandledExceptionEventArgs.cs
- AccessViolationException.cs
- COM2Enum.cs
- GridPatternIdentifiers.cs
- TextParagraphView.cs
- DataBoundControlHelper.cs
- TypeRefElement.cs
- Control.cs
- UriTemplateHelpers.cs
- PrivateFontCollection.cs
- UInt16Converter.cs
- SimpleHandlerFactory.cs
- LinkedResource.cs
- DbMetaDataColumnNames.cs
- ConfigurationConverterBase.cs
- _Semaphore.cs
- GeometryValueSerializer.cs
- XmlAttribute.cs
- NullReferenceException.cs
- TripleDES.cs
- MetaModel.cs
- NameTable.cs
- ErrorFormatterPage.cs
- MsmqAuthenticationMode.cs
- SmiEventStream.cs
- ExpressionBindingsDialog.cs
- CoTaskMemHandle.cs
- HtmlTitle.cs
- DrawingAttributeSerializer.cs
- TextRunCache.cs
- HitTestParameters3D.cs
- StrokeCollectionConverter.cs
- Latin1Encoding.cs
- ExtenderHelpers.cs
- QueryCacheManager.cs
- ImageField.cs
- ConfigurationSectionGroupCollection.cs
- HandoffBehavior.cs
- LinkArea.cs
- HttpHeaderCollection.cs
- DelimitedListTraceListener.cs
- WmlMobileTextWriter.cs
- SimpleExpression.cs
- TimeSpanConverter.cs
- FirstMatchCodeGroup.cs
- ImageAnimator.cs