Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / WinForms / Managed / System / WinForms / DropTarget.cs / 1 / DropTarget.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Diagnostics; using System.Security.Permissions; using System.Security; using System.ComponentModel; using IComDataObject = System.Runtime.InteropServices.ComTypes.IDataObject; ////// internal class DropTarget : UnsafeNativeMethods.IOleDropTarget { private IDataObject lastDataObject = null; private DragDropEffects lastEffect = DragDropEffects.None; private IDropTarget owner; public DropTarget(IDropTarget owner) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "DropTarget created"); this.owner = owner; } #if DEBUG ~DropTarget() { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "DropTarget destroyed"); } #endif private DragEventArgs CreateDragEventArgs(object pDataObj, int grfKeyState, NativeMethods.POINTL pt, int pdwEffect) { IDataObject data = null; if (pDataObj == null) { data = lastDataObject; } else { if (pDataObj is IDataObject) { data = (IDataObject)pDataObj; } else if (pDataObj is IComDataObject) { data = new DataObject(pDataObj); } else { return null; // Unknown data object interface; we can't work with this so return null } } DragEventArgs drgevent = new DragEventArgs(data, grfKeyState, pt.x, pt.y, (DragDropEffects)pdwEffect, lastEffect); lastDataObject = data; return drgevent; } int UnsafeNativeMethods.IOleDropTarget.OleDragEnter(object pDataObj, int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragEnter recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); Debug.Assert(pDataObj != null, "OleDragEnter didn't give us a valid data object."); DragEventArgs drgevent = CreateDragEventArgs(pDataObj, grfKeyState, ptl, pdwEffect); if (drgevent != null) { owner.OnDragEnter(drgevent); pdwEffect = (int)drgevent.Effect; lastEffect = drgevent.Effect; } else { pdwEffect = (int)DragDropEffects.None; } return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDragOver(int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragOver recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); DragEventArgs drgevent = CreateDragEventArgs(null, grfKeyState, ptl, pdwEffect); owner.OnDragOver(drgevent); pdwEffect = (int)drgevent.Effect; lastEffect = drgevent.Effect; return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDragLeave() { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragLeave recieved"); owner.OnDragLeave(EventArgs.Empty); return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDrop(object pDataObj, int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDrop recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); DragEventArgs drgevent = CreateDragEventArgs(pDataObj, grfKeyState, ptl, pdwEffect); if (drgevent != null) { owner.OnDragDrop(drgevent); pdwEffect = (int)drgevent.Effect; } else { pdwEffect = (int)DragDropEffects.None; } lastEffect = DragDropEffects.None; lastDataObject = null; return NativeMethods.S_OK; } private int GetX(long pt) { return(int)(pt & 0xFFFFFFFF); } private int GetY(long pt) { return(int)((pt >> 32) & 0xFFFFFFFF); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Diagnostics; using System.Security.Permissions; using System.Security; using System.ComponentModel; using IComDataObject = System.Runtime.InteropServices.ComTypes.IDataObject; ////// internal class DropTarget : UnsafeNativeMethods.IOleDropTarget { private IDataObject lastDataObject = null; private DragDropEffects lastEffect = DragDropEffects.None; private IDropTarget owner; public DropTarget(IDropTarget owner) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "DropTarget created"); this.owner = owner; } #if DEBUG ~DropTarget() { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "DropTarget destroyed"); } #endif private DragEventArgs CreateDragEventArgs(object pDataObj, int grfKeyState, NativeMethods.POINTL pt, int pdwEffect) { IDataObject data = null; if (pDataObj == null) { data = lastDataObject; } else { if (pDataObj is IDataObject) { data = (IDataObject)pDataObj; } else if (pDataObj is IComDataObject) { data = new DataObject(pDataObj); } else { return null; // Unknown data object interface; we can't work with this so return null } } DragEventArgs drgevent = new DragEventArgs(data, grfKeyState, pt.x, pt.y, (DragDropEffects)pdwEffect, lastEffect); lastDataObject = data; return drgevent; } int UnsafeNativeMethods.IOleDropTarget.OleDragEnter(object pDataObj, int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragEnter recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); Debug.Assert(pDataObj != null, "OleDragEnter didn't give us a valid data object."); DragEventArgs drgevent = CreateDragEventArgs(pDataObj, grfKeyState, ptl, pdwEffect); if (drgevent != null) { owner.OnDragEnter(drgevent); pdwEffect = (int)drgevent.Effect; lastEffect = drgevent.Effect; } else { pdwEffect = (int)DragDropEffects.None; } return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDragOver(int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragOver recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); DragEventArgs drgevent = CreateDragEventArgs(null, grfKeyState, ptl, pdwEffect); owner.OnDragOver(drgevent); pdwEffect = (int)drgevent.Effect; lastEffect = drgevent.Effect; return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDragLeave() { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDragLeave recieved"); owner.OnDragLeave(EventArgs.Empty); return NativeMethods.S_OK; } int UnsafeNativeMethods.IOleDropTarget.OleDrop(object pDataObj, int grfKeyState, long pt, ref int pdwEffect) { Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "OleDrop recieved"); NativeMethods.POINTL ptl = new NativeMethods.POINTL(); ptl.x = GetX(pt); ptl.y = GetY(pt); Debug.WriteLineIf(CompModSwitches.DragDrop.TraceInfo, "\t" + (ptl.x) + "," + (ptl.y)); DragEventArgs drgevent = CreateDragEventArgs(pDataObj, grfKeyState, ptl, pdwEffect); if (drgevent != null) { owner.OnDragDrop(drgevent); pdwEffect = (int)drgevent.Effect; } else { pdwEffect = (int)DragDropEffects.None; } lastEffect = DragDropEffects.None; lastDataObject = null; return NativeMethods.S_OK; } private int GetX(long pt) { return(int)(pt & 0xFFFFFFFF); } private int GetY(long pt) { return(int)((pt >> 32) & 0xFFFFFFFF); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- RadioButtonList.cs
- DataBindingExpressionBuilder.cs
- MailDefinition.cs
- ExpressionList.cs
- RpcResponse.cs
- OptimizerPatterns.cs
- BaseDataList.cs
- RepeaterCommandEventArgs.cs
- SpellerHighlightLayer.cs
- SQLByte.cs
- UntrustedRecipientException.cs
- MobileSysDescriptionAttribute.cs
- HtmlLink.cs
- WindowsListViewSubItem.cs
- AddInEnvironment.cs
- CodeDomSerializerException.cs
- WebBodyFormatMessageProperty.cs
- ToolboxBitmapAttribute.cs
- ZipIOCentralDirectoryFileHeader.cs
- ColumnCollection.cs
- DetailsViewUpdateEventArgs.cs
- TextParaClient.cs
- DataBindingList.cs
- ILGenerator.cs
- WorkflowHostingResponseContext.cs
- CodeFieldReferenceExpression.cs
- SafePEFileHandle.cs
- ModifiableIteratorCollection.cs
- XhtmlTextWriter.cs
- CreateUserErrorEventArgs.cs
- DataGridBoolColumn.cs
- StackSpiller.cs
- IsolationInterop.cs
- AssemblyFilter.cs
- PeerInvitationResponse.cs
- HttpValueCollection.cs
- PairComparer.cs
- ProcessInfo.cs
- ProfileBuildProvider.cs
- FragmentQuery.cs
- LocationSectionRecord.cs
- CollectionContainer.cs
- CheckedPointers.cs
- Stroke.cs
- UnsafeNativeMethods.cs
- TextTreeTextBlock.cs
- xmlglyphRunInfo.cs
- CompatibleComparer.cs
- MDIControlStrip.cs
- HostingPreferredMapPath.cs
- DesignerSerializerAttribute.cs
- DispatchChannelSink.cs
- SQLInt16Storage.cs
- OleDbParameter.cs
- configsystem.cs
- BuildManagerHost.cs
- XamlNamespaceHelper.cs
- DefaultHttpHandler.cs
- ParameterCollectionEditorForm.cs
- CrossAppDomainChannel.cs
- KnownIds.cs
- MouseActionValueSerializer.cs
- View.cs
- ConnectionPoint.cs
- BufferedReadStream.cs
- ApplicationFileCodeDomTreeGenerator.cs
- ObjectList.cs
- TreeNodeStyleCollection.cs
- JsonFormatGeneratorStatics.cs
- FontInfo.cs
- GraphicsPath.cs
- XamlGridLengthSerializer.cs
- TextWriterTraceListener.cs
- Attribute.cs
- OrthographicCamera.cs
- ErasingStroke.cs
- VideoDrawing.cs
- IERequestCache.cs
- EnterpriseServicesHelper.cs
- TextEffect.cs
- HandlerBase.cs
- GcSettings.cs
- _NegotiateClient.cs
- DecoderFallback.cs
- TextLineResult.cs
- validationstate.cs
- DataGridViewColumn.cs
- DesignerDeviceConfig.cs
- WindowsBrush.cs
- DebugInfoExpression.cs
- Interfaces.cs
- log.cs
- DiagnosticTrace.cs
- WindowsSpinner.cs
- RemoteX509AsymmetricSecurityKey.cs
- XmlName.cs
- TextTreeExtractElementUndoUnit.cs
- AutoResizedEvent.cs
- SafeArrayRankMismatchException.cs
- StateItem.cs