Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DropSource.cs / 1 / DropSource.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; /// internal class DropSource : UnsafeNativeMethods.IOleDropSource { private const int DragDropSDrop = 0x00040100; private const int DragDropSCancel = 0x00040101; private const int DragDropSUseDefaultCursors = 0x00040102; private ISupportOleDropSource peer; public DropSource(ISupportOleDropSource peer ) { if (peer == null) throw new ArgumentNullException("peer"); this.peer = peer; } public int OleQueryContinueDrag(int fEscapePressed, int grfKeyState) { QueryContinueDragEventArgs qcdevent = null; bool escapePressed = (fEscapePressed != 0); DragAction action = DragAction.Continue; if (escapePressed) { action = DragAction.Cancel; } else if ((grfKeyState & NativeMethods.MK_LBUTTON) == 0 && (grfKeyState & NativeMethods.MK_RBUTTON) == 0 && (grfKeyState & NativeMethods.MK_MBUTTON) == 0) { action = DragAction.Drop; } qcdevent = new QueryContinueDragEventArgs(grfKeyState,escapePressed, action); peer.OnQueryContinueDrag(qcdevent); int hr = 0; switch (qcdevent.Action) { case DragAction.Drop: hr = DragDropSDrop; break; case DragAction.Cancel: hr = DragDropSCancel; break; } return hr; } public int OleGiveFeedback(int dwEffect) { GiveFeedbackEventArgs gfbevent = new GiveFeedbackEventArgs((DragDropEffects) dwEffect, true); peer.OnGiveFeedback(gfbevent); if (gfbevent.UseDefaultCursors) { return DragDropSUseDefaultCursors; } return 0; } } } // 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
- WebServiceReceiveDesigner.cs
- Schema.cs
- HttpGetClientProtocol.cs
- InternalConfigSettingsFactory.cs
- Viewport3DAutomationPeer.cs
- ResumeStoryboard.cs
- SymbolMethod.cs
- URLAttribute.cs
- TraceContextEventArgs.cs
- InstallerTypeAttribute.cs
- FixedTextView.cs
- XmlKeywords.cs
- ZipIOCentralDirectoryBlock.cs
- XmlIlVisitor.cs
- LoginName.cs
- DataGridViewControlCollection.cs
- ProxyAttribute.cs
- EntityDataSourceChangingEventArgs.cs
- DbConnectionPoolGroup.cs
- SqlXmlStorage.cs
- BooleanExpr.cs
- HttpException.cs
- FunctionCommandText.cs
- Invariant.cs
- FrameworkContextData.cs
- _BufferOffsetSize.cs
- XmlILAnnotation.cs
- SubclassTypeValidator.cs
- ConfigXmlSignificantWhitespace.cs
- SqlDataSourceSelectingEventArgs.cs
- DefaultMemberAttribute.cs
- compensatingcollection.cs
- KnownColorTable.cs
- ComponentCollection.cs
- HandlerWithFactory.cs
- OpCodes.cs
- VectorCollection.cs
- SchemaAttDef.cs
- PanelDesigner.cs
- ReadOnlyHierarchicalDataSourceView.cs
- UIPermission.cs
- DesignerVerbCollection.cs
- PropVariant.cs
- MetabaseReader.cs
- TcpSocketManager.cs
- TreeBuilderBamlTranslator.cs
- ByeOperationAsyncResult.cs
- WebPartsSection.cs
- ProfileGroupSettingsCollection.cs
- EventLogger.cs
- ZipIOExtraFieldZip64Element.cs
- AssemblyAttributes.cs
- StylusEditingBehavior.cs
- XmlUtil.cs
- RectIndependentAnimationStorage.cs
- StrokeNodeOperations2.cs
- WebPartManagerInternals.cs
- EntityPropertyMappingAttribute.cs
- Sql8ConformanceChecker.cs
- CryptoConfig.cs
- CallTemplateAction.cs
- UInt16Storage.cs
- SiteMapNode.cs
- Parsers.cs
- AutomationIdentifierGuids.cs
- ParamArrayAttribute.cs
- ListViewCommandEventArgs.cs
- ImageFormat.cs
- BidirectionalDictionary.cs
- MeshGeometry3D.cs
- DeferredReference.cs
- DBProviderConfigurationHandler.cs
- PropertyManager.cs
- sqlcontext.cs
- SqlMethodCallConverter.cs
- RichTextBoxConstants.cs
- ContextMenuService.cs
- SqlStatistics.cs
- DiagnosticsConfiguration.cs
- CodeTypeParameter.cs
- UdpSocket.cs
- InitializationEventAttribute.cs
- UnsafeNativeMethods.cs
- SerializationTrace.cs
- Nodes.cs
- ListViewDesigner.cs
- _RequestCacheProtocol.cs
- LinkClickEvent.cs
- XD.cs
- COM2ExtendedTypeConverter.cs
- RequestUriProcessor.cs
- CharEnumerator.cs
- PackagePartCollection.cs
- ApplySecurityAndSendAsyncResult.cs
- DiscoveryCallbackBehavior.cs
- SqlMetaData.cs
- ClientConvert.cs
- AnyReturnReader.cs
- DocumentViewer.cs
- WindowsRichEdit.cs