Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / System / Windows / DragEventArgs.cs / 1305600 / DragEventArgs.cs
//---------------------------------------------------------------------------- // // File: DragEventArgs.cs // // Copyright (C) Microsoft Corporation. All rights reserved. // // Description: DragEventArgs for drag-and-drop operation. // // // History: // 08/19/2004 : sangilj Created // //--------------------------------------------------------------------------- using System; using System.Diagnostics; using System.Windows.Media; using System.Windows.Input; using SR=MS.Internal.PresentationCore.SR; using SRID=MS.Internal.PresentationCore.SRID; namespace System.Windows { ////// The DragEventArgs class represents a type of RoutedEventArgs that /// are relevant to all drag events(DragEnter/DragOver/DragLeave/DragDrop). /// public sealed class DragEventArgs : RoutedEventArgs { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors ////// Constructs a DragEventArgs instance. /// /// /// The data object used in this drag drop operation. /// /// /// The current state of the mouse button and modifier keys. /// /// /// Allowed effects of a drag-and-drop operation. /// /// /// The target of the event. /// /// /// The current mouse position of the target. /// internal DragEventArgs(IDataObject data, DragDropKeyStates dragDropKeyStates, DragDropEffects allowedEffects, DependencyObject target, Point point) { if (!DragDrop.IsValidDragDropKeyStates(dragDropKeyStates)) { Debug.Assert(false, "Invalid dragDropKeyStates"); } if (!DragDrop.IsValidDragDropEffects(allowedEffects)) { Debug.Assert(false, "Invalid allowedEffects"); } if (target == null) { Debug.Assert(false, "Invalid target"); } this._data = data; this._dragDropKeyStates = dragDropKeyStates; this._allowedEffects = allowedEffects; this._target = target; this._dropPoint = point; this._effects = allowedEffects; } #endregion Constructors //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Public Methods ////// The point of drop operation that based on relativeTo. /// public Point GetPosition(IInputElement relativeTo) { Point dropPoint; if (relativeTo == null) { throw new ArgumentNullException("relativeTo"); } dropPoint = new Point(0, 0); if (_target != null) { // Translate the drop point from the drop target to the relative element. dropPoint = InputElement.TranslatePoint(_dropPoint, _target, (DependencyObject)relativeTo); } return dropPoint; } #endregion Public Methods //------------------------------------------------------ // // Public Properties // //------------------------------------------------------ #region Public Properties ////// The data object of drop operation /// public IDataObject Data { get { return _data; } } ////// The DragDropKeyStates that indicates the current states for /// physical keyboard keys and mouse buttons. /// public DragDropKeyStates KeyStates { get { return _dragDropKeyStates; } } ////// The allowed effects of drag and drop operation /// public DragDropEffects AllowedEffects { get { return _allowedEffects; } } ////// The effects of drag and drop operation /// public DragDropEffects Effects { get { return _effects; } set { if (!DragDrop.IsValidDragDropEffects(value)) { throw new ArgumentException(SR.Get(SRID.DragDrop_DragDropEffectsInvalid, "value")); } _effects = value; } } #endregion Public Properties #region Protected Methods //----------------------------------------------------- // // Protected Methods // //------------------------------------------------------ ////// The mechanism used to call the type-specific handler on the target. /// /// /// The generic handler to call in a type-specific way. /// /// /// The target to call the handler on. /// protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget) { DragEventHandler handler = (DragEventHandler)genericHandler; handler(genericTarget, this); } #endregion Protected Methods //----------------------------------------------------- // // Private Fields // //----------------------------------------------------- #region Private Fields private IDataObject _data; private DragDropKeyStates _dragDropKeyStates; private DragDropEffects _allowedEffects; private DragDropEffects _effects; private DependencyObject _target; private Point _dropPoint; #endregion Private Fields } } // 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
- TextDataBindingHandler.cs
- PageRequestManager.cs
- PolicyLevel.cs
- Matrix.cs
- LoadMessageLogger.cs
- MatrixKeyFrameCollection.cs
- SequenceNumber.cs
- SoapElementAttribute.cs
- Util.cs
- PreloadedPackages.cs
- RulePatternOps.cs
- AssemblyCache.cs
- WbemException.cs
- _IPv4Address.cs
- DuplexClientBase.cs
- HtmlForm.cs
- XslException.cs
- TimeSpanValidator.cs
- QualifiedCellIdBoolean.cs
- UInt64.cs
- DetailsViewRowCollection.cs
- DocumentViewerHelper.cs
- ListViewContainer.cs
- DataGridAddNewRow.cs
- CallContext.cs
- DataBoundControl.cs
- smtppermission.cs
- FileSystemWatcher.cs
- MsmqBindingElementBase.cs
- DetailsViewUpdatedEventArgs.cs
- CompiledRegexRunner.cs
- TextElementCollection.cs
- ResourceDescriptionAttribute.cs
- CodeDirectiveCollection.cs
- FreezableOperations.cs
- AccessDataSourceView.cs
- FontStretchConverter.cs
- WebPartCloseVerb.cs
- FlowDocumentReaderAutomationPeer.cs
- WebPartAddingEventArgs.cs
- Font.cs
- shaperfactoryquerycachekey.cs
- NavigationPropertyEmitter.cs
- DataViewManager.cs
- ClickablePoint.cs
- DataGridViewCellParsingEventArgs.cs
- GregorianCalendarHelper.cs
- RequestSecurityTokenResponse.cs
- AxHost.cs
- PropertyToken.cs
- HandlerBase.cs
- ScopeCompiler.cs
- SqlWebEventProvider.cs
- DataServiceQueryException.cs
- PerfProviderCollection.cs
- SpecialFolderEnumConverter.cs
- ValidationEventArgs.cs
- Label.cs
- RefreshEventArgs.cs
- ExpandSegmentCollection.cs
- TextTrailingWordEllipsis.cs
- LongValidator.cs
- typedescriptorpermission.cs
- ActivityCollectionMarkupSerializer.cs
- DefaultWorkflowLoaderService.cs
- HtmlTitle.cs
- UInt32Converter.cs
- ReflectionTypeLoadException.cs
- DirectionalLight.cs
- ConstraintManager.cs
- FixedSOMTableRow.cs
- PropertyEntry.cs
- DateTimeUtil.cs
- NameTable.cs
- GPPOINTF.cs
- Rect3D.cs
- TreeViewItemAutomationPeer.cs
- DataGridTable.cs
- GridViewRowEventArgs.cs
- HttpWriter.cs
- EncodingDataItem.cs
- SqlTopReducer.cs
- RoutedUICommand.cs
- SrgsToken.cs
- StorageEntitySetMapping.cs
- Util.cs
- ProfileGroupSettings.cs
- SymmetricCryptoHandle.cs
- ControlBuilder.cs
- ProfileGroupSettings.cs
- ProfilePropertyNameValidator.cs
- ELinqQueryState.cs
- SAPICategories.cs
- MetadataArtifactLoaderResource.cs
- InheritanceContextChangedEventManager.cs
- HtmlLink.cs
- TreeViewHitTestInfo.cs
- bidPrivateBase.cs
- SizeKeyFrameCollection.cs
- EventsTab.cs