Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / 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
- DataGridViewHeaderCell.cs
- AuthenticationSection.cs
- AnimatedTypeHelpers.cs
- ObjectStateEntryOriginalDbUpdatableDataRecord.cs
- HwndMouseInputProvider.cs
- ListViewItem.cs
- ManifestResourceInfo.cs
- SystemColors.cs
- ToolboxItemCollection.cs
- ConsumerConnectionPointCollection.cs
- PerformanceCounterManager.cs
- Typography.cs
- ElementProxy.cs
- QueryCacheManager.cs
- BitHelper.cs
- KerberosSecurityTokenProvider.cs
- SequentialWorkflowRootDesigner.cs
- PeerTransportListenAddressConverter.cs
- DbConnectionPoolCounters.cs
- ToolStripDropDownItem.cs
- DefaultValidator.cs
- XmlAttributes.cs
- UIntPtr.cs
- HScrollBar.cs
- DesignerAutoFormatCollection.cs
- Component.cs
- BrushValueSerializer.cs
- ServiceModelSecurityTokenRequirement.cs
- DataGridItemCollection.cs
- ListenDesigner.cs
- odbcmetadatacolumnnames.cs
- WebServiceTypeData.cs
- StyleHelper.cs
- FrameworkObject.cs
- WebPartMovingEventArgs.cs
- arclist.cs
- SvcMapFile.cs
- Byte.cs
- SchemaComplexType.cs
- ToolboxBitmapAttribute.cs
- TextFindEngine.cs
- UriTemplateLiteralQueryValue.cs
- SystemFonts.cs
- backend.cs
- SubpageParagraph.cs
- TaskHelper.cs
- BuildProviderUtils.cs
- CannotUnloadAppDomainException.cs
- SHA1CryptoServiceProvider.cs
- ScriptReferenceEventArgs.cs
- StylusPointProperties.cs
- ScaleTransform.cs
- ColumnResizeUndoUnit.cs
- RecipientInfo.cs
- ArrayList.cs
- StaticSiteMapProvider.cs
- InstanceLockLostException.cs
- Roles.cs
- ImportContext.cs
- OneOf.cs
- StandardCommands.cs
- UnlockInstanceCommand.cs
- ColumnCollection.cs
- _IPv6Address.cs
- WeakReadOnlyCollection.cs
- BaseCodePageEncoding.cs
- TextBoxBase.cs
- httpapplicationstate.cs
- ParallelTimeline.cs
- MetadataPropertyvalue.cs
- TypeDescriptionProvider.cs
- FixedHyperLink.cs
- ScriptReferenceEventArgs.cs
- DataMember.cs
- ErrorFormatterPage.cs
- MultilineStringConverter.cs
- TreeBuilder.cs
- MetaTable.cs
- Scene3D.cs
- VisualStyleTypesAndProperties.cs
- DataPagerFieldCommandEventArgs.cs
- RequestResizeEvent.cs
- CompoundFileStreamReference.cs
- XmlSchemaInclude.cs
- Color.cs
- DocComment.cs
- ControlValuePropertyAttribute.cs
- CustomGrammar.cs
- DataServices.cs
- _UriTypeConverter.cs
- DataTableReader.cs
- Queue.cs
- StackOverflowException.cs
- BamlRecordHelper.cs
- DbInsertCommandTree.cs
- AtomEntry.cs
- SwitchAttribute.cs
- Parallel.cs
- Rect.cs
- PbrsForward.cs