1062 lines
26 KiB
C
1062 lines
26 KiB
C
/*
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* OLE2 library
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*
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* Copyright 1995 Martin von Loewis
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* Copyright 1999 Francis Beaudet
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*/
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#include <assert.h>
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#include "windows.h"
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#include "winerror.h"
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#include "ole2.h"
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#include "process.h"
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#include "debug.h"
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#include "objbase.h"
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#include "objidl.h"
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#include "wine/obj_base.h"
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#include "wine/obj_clientserver.h"
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#include "wine/obj_storage.h"
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#include "wine/obj_moniker.h"
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/******************************************************************************
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* These are static/global variables and internal data structures that the
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* OLE module uses to maintain it's state.
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*/
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typedef struct tagDropTargetNode
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{
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HWND hwndTarget;
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IDropTarget* dropTarget;
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struct tagDropTargetNode* prevDropTarget;
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struct tagDropTargetNode* nextDropTarget;
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} DropTargetNode;
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typedef struct tagTrackerWindowInfo
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{
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IDataObject* dataObject;
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IDropSource* dropSource;
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DWORD dwOKEffect;
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DWORD* pdwEffect;
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BOOL trackingDone;
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HRESULT returnValue;
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BOOL escPressed;
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HWND curDragTargetHWND;
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IDropTarget* curDragTarget;
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} TrackerWindowInfo;
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/*
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* This is the lock count on the OLE library. It is controlled by the
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* OLEInitialize/OLEUninitialize methods.
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*/
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static ULONG OLE_moduleLockCount = 0;
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/*
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* Name of our registered window class.
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*/
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static const char OLEDD_DRAGTRACKERCLASS[] = "WineDragDropTracker32";
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/*
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* This is the head of the Drop target container.
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*/
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static DropTargetNode* targetListHead = NULL;
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/******************************************************************************
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* These are the prototypes of the utility methods used for OLE Drag n Drop
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*/
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static void OLEDD_Initialize();
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static void OLEDD_UnInitialize();
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static void OLEDD_InsertDropTarget(
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DropTargetNode* nodeToAdd);
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static DropTargetNode* OLEDD_ExtractDropTarget(
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HWND hwndOfTarget);
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static DropTargetNode* OLEDD_FindDropTarget(
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HWND hwndOfTarget);
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static LRESULT WINAPI OLEDD_DragTrackerWindowProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam);
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static void OLEDD_TrackMouseMove(
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TrackerWindowInfo* trackerInfo,
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POINT mousePos,
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DWORD keyState);
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static void OLEDD_TrackStateChange(
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TrackerWindowInfo* trackerInfo,
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POINT mousePos,
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DWORD keyState);
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static DWORD OLEDD_GetButtonState();
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/******************************************************************************
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* OleBuildVersion [OLE2.1]
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*/
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DWORD WINAPI OleBuildVersion(void)
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{
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TRACE(ole,"(void)\n");
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return (rmm<<16)+rup;
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}
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/***********************************************************************
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* OleInitialize (OLE2.2) (OLE32.108)
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*/
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HRESULT WINAPI OleInitialize(LPVOID reserved)
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{
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HRESULT hr;
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TRACE(ole, "(%p)\n", reserved);
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/*
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* The first duty of the OleInitialize is to initialize the COM libraries.
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*/
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hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
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/*
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* If the CoInitializeEx call failed, the OLE libraries can't be
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* initialized.
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*/
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if (FAILED(hr))
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return hr;
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/*
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* Then, it has to initialize the OLE specific modules.
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* This includes:
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* Clipboard
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* Drag and Drop
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* Object linking and Embedding
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* In-place activation
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*/
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if (OLE_moduleLockCount==0)
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{
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/*
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* Initialize the libraries.
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*/
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TRACE(ole, "() - Initializing the OLE libraries\n");
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/*
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* Drag and Drop
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*/
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OLEDD_Initialize();
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}
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/*
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* Then, we increase the lock count on the OLE module.
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*/
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OLE_moduleLockCount++;
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return hr;
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}
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/******************************************************************************
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* CoGetCurrentProcess [COMPOBJ.34] [OLE2.2][OLE32.108]
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*
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* NOTES
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* Is DWORD really the correct return type for this function?
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*/
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DWORD WINAPI CoGetCurrentProcess(void) {
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return (DWORD)PROCESS_Current();
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}
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/******************************************************************************
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* OleUninitialize [OLE2.3] [OLE32.131]
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*/
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void WINAPI OleUninitialize(void)
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{
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TRACE(ole, "()\n");
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/*
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* Decrease the lock count on the OLE module.
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*/
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OLE_moduleLockCount--;
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/*
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* If we hit the bottom of the lock stack, free the libraries.
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*/
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if (OLE_moduleLockCount==0)
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{
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/*
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* Actually free the libraries.
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*/
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TRACE(ole, "() - Freeing the last reference count\n");
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/*
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* Drag and Drop
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*/
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OLEDD_UnInitialize();
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}
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/*
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* Then, uninitialize the COM libraries.
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*/
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CoUninitialize();
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}
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/***********************************************************************
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* OleFlushClipboard [OLE2.76]
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*/
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HRESULT WINAPI OleFlushClipboard16(void)
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{
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return S_OK;
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}
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/***********************************************************************
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* OleSetClipboard [OLE32.127]
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*/
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HRESULT WINAPI OleSetClipboard(LPVOID pDataObj)
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{
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FIXME(ole,"(%p), stub!\n", pDataObj);
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return S_OK;
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}
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/******************************************************************************
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* CoRegisterMessageFilter32 [OLE32.38]
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*/
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HRESULT WINAPI CoRegisterMessageFilter(
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LPMESSAGEFILTER lpMessageFilter, /* Pointer to interface */
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LPMESSAGEFILTER *lplpMessageFilter /* Indirect pointer to prior instance if non-NULL */
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) {
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FIXME(ole,"stub\n");
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if (lplpMessageFilter) {
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*lplpMessageFilter = NULL;
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}
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return S_OK;
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}
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/******************************************************************************
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* OleInitializeWOW [OLE32.109]
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*/
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HRESULT WINAPI OleInitializeWOW(DWORD x) {
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FIXME(ole,"(0x%08lx),stub!\n",x);
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return 0;
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}
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/***********************************************************************
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* RegisterDragDrop16 (OLE2.35)
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*/
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HRESULT WINAPI RegisterDragDrop16(
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HWND16 hwnd,
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LPDROPTARGET pDropTarget
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) {
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FIXME(ole,"(0x%04x,%p),stub!\n",hwnd,pDropTarget);
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return S_OK;
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}
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/***********************************************************************
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* RegisterDragDrop32 (OLE32.139)
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*/
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HRESULT WINAPI RegisterDragDrop(
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HWND hwnd,
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LPDROPTARGET pDropTarget)
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{
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DropTargetNode* dropTargetInfo;
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TRACE(ole,"(0x%x,%p)\n", hwnd, pDropTarget);
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/*
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* First, check if the window is already registered.
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*/
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dropTargetInfo = OLEDD_FindDropTarget(hwnd);
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if (dropTargetInfo!=NULL)
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return DRAGDROP_E_ALREADYREGISTERED;
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/*
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* If it's not there, we can add it. We first create a node for it.
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*/
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dropTargetInfo = HeapAlloc(GetProcessHeap(), 0, sizeof(DropTargetNode));
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if (dropTargetInfo==NULL)
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return E_OUTOFMEMORY;
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dropTargetInfo->hwndTarget = hwnd;
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dropTargetInfo->prevDropTarget = NULL;
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dropTargetInfo->nextDropTarget = NULL;
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/*
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* Don't forget that this is an interface pointer, need to nail it down since
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* we keep a copy of it.
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*/
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dropTargetInfo->dropTarget = pDropTarget;
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IDropTarget_AddRef(dropTargetInfo->dropTarget);
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OLEDD_InsertDropTarget(dropTargetInfo);
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return S_OK;
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}
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/***********************************************************************
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* RevokeDragDrop16 (OLE2.36)
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*/
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HRESULT WINAPI RevokeDragDrop16(
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HWND16 hwnd
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) {
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FIXME(ole,"(0x%04x),stub!\n",hwnd);
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return S_OK;
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}
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/***********************************************************************
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* RevokeDragDrop32 (OLE32.141)
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*/
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HRESULT WINAPI RevokeDragDrop(
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HWND hwnd)
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{
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DropTargetNode* dropTargetInfo;
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TRACE(ole,"(0x%x)\n", hwnd);
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/*
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* First, check if the window is already registered.
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*/
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dropTargetInfo = OLEDD_ExtractDropTarget(hwnd);
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/*
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* If it ain't in there, it's an error.
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*/
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if (dropTargetInfo==NULL)
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return DRAGDROP_E_NOTREGISTERED;
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/*
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* If it's in there, clean-up it's used memory and
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* references
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*/
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IDropTarget_Release(dropTargetInfo->dropTarget);
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HeapFree(GetProcessHeap(), 0, dropTargetInfo);
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return S_OK;
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}
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/***********************************************************************
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* OleRegGetUserType (OLE32.122)
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*/
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HRESULT WINAPI OleRegGetUserType(
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REFCLSID clsid,
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DWORD dwFormOfType,
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LPOLESTR* pszUserType)
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{
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FIXME(ole,",stub!\n");
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return S_OK;
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}
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/***********************************************************************
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* DoDragDrop32 [OLE32.65]
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*/
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HRESULT WINAPI DoDragDrop (
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IDataObject *pDataObject, /* ptr to the data obj */
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IDropSource* pDropSource, /* ptr to the source obj */
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DWORD dwOKEffect, /* effects allowed by the source */
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DWORD *pdwEffect) /* ptr to effects of the source */
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{
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TrackerWindowInfo trackerInfo;
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HWND hwndTrackWindow;
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MSG msg;
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TRACE(ole,"(DataObject %p, DropSource %p)\n", pDataObject, pDropSource);
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/*
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* Setup the drag n drop tracking window.
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*/
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trackerInfo.dataObject = pDataObject;
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trackerInfo.dropSource = pDropSource;
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trackerInfo.dwOKEffect = dwOKEffect;
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trackerInfo.pdwEffect = pdwEffect;
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trackerInfo.trackingDone = FALSE;
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trackerInfo.escPressed = FALSE;
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trackerInfo.curDragTargetHWND = 0;
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trackerInfo.curDragTarget = 0;
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hwndTrackWindow = CreateWindowA(OLEDD_DRAGTRACKERCLASS,
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"TrackerWindow",
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WS_POPUP,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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0,
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0,
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0,
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(LPVOID)&trackerInfo);
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if (hwndTrackWindow!=0)
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{
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/*
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* Capture the mouse input
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*/
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SetCapture(hwndTrackWindow);
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/*
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* Pump messages. All mouse input should go the the capture window.
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*/
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while (!trackerInfo.trackingDone && GetMessageA(&msg, 0, 0, 0) )
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{
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if ( (msg.message >= WM_KEYFIRST) &&
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(msg.message <= WM_KEYFIRST) )
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{
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/*
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* When keyboard messages are sent to windows on this thread, we
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* want to ignore notify the drop source that the state changed.
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* in the case of the Escape key, we also notify the drop source
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* we give it a special meaning.
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*/
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if ( (msg.message==WM_KEYDOWN) &&
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(msg.wParam==VK_ESCAPE) )
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{
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trackerInfo.escPressed = TRUE;
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}
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/*
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* Notify the drop source.
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*/
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OLEDD_TrackStateChange(&trackerInfo,
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msg.pt,
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OLEDD_GetButtonState());
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}
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else
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{
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/*
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* Dispatch the messages only when it's not a keyboard message.
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*/
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DispatchMessageA(&msg);
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}
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}
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/*
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* Destroy the temporary window.
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*/
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DestroyWindow(hwndTrackWindow);
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return trackerInfo.returnValue;
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}
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return E_FAIL;
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}
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/***********************************************************************
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* OleQueryLinkFromData32 [OLE32.118]
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*/
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HRESULT WINAPI OleQueryLinkFromData32(
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IDataObject* pSrcDataObject)
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{
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FIXME(ole,"(%p),stub!\n", pSrcDataObject);
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return S_OK;
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}
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/***********************************************************************
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* OleRegGetMiscStatus32 [OLE32.121]
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*/
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HRESULT WINAPI OleRegGetMiscStatus32(
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REFCLSID clsid,
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DWORD dwAspect,
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DWORD* pdwStatus)
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{
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FIXME(ole,"(),stub!\n");
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return REGDB_E_CLASSNOTREG;
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}
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/***********************************************************************
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* OleGetClipboard32 [OLE32.105]
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*/
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HRESULT WINAPI OleGetClipboard32(
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IDataObject** ppDataObj)
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{
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FIXME(ole,"(%p),stub!\n", ppDataObj);
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if (ppDataObj)
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*ppDataObj=0;
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return E_FAIL;
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}
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/***********************************************************************
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* OleCreateMenuDescriptor [OLE32.97]
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*/
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HOLEMENU WINAPI OleCreateMenuDescriptor(
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HMENU hmenuCombined,
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LPOLEMENUGROUPWIDTHS lpMenuWidths)
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{
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FIXME(ole,"(%x,%p),stub!\n", hmenuCombined, lpMenuWidths);
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return NULL;
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}
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/***********************************************************************
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* OleDestroyMenuDescriptor [OLE32.99]
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*/
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void WINAPI OleDestroyMenuDescriptor(
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HOLEMENU hmenuDescriptor)
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{
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FIXME(ole,"(%x),stub!\n", (unsigned int)hmenuDescriptor);
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}
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|
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/***********************************************************************
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* OleSetMenuDescriptor [OLE32.129]
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*/
|
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HRESULT WINAPI OleSetMenuDescriptor(
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HOLEMENU hmenuDescriptor,
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HWND hwndFrame,
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HWND hwndActiveObject,
|
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LPOLEINPLACEFRAME lpFrame,
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LPOLEINPLACEACTIVEOBJECT lpActiveObject)
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{
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FIXME(ole,"(%x, %x, %x, %p, %p),stub!\n",
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(unsigned int)hmenuDescriptor,
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hwndFrame,
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hwndActiveObject,
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lpFrame,
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lpActiveObject);
|
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return E_FAIL;
|
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}
|
|
|
|
/***
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* OLEDD_Initialize()
|
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*
|
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* Initializes the OLE drag and drop data structures.
|
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*/
|
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static void OLEDD_Initialize()
|
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{
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WNDCLASSA wndClass;
|
|
|
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ZeroMemory (&wndClass, sizeof(WNDCLASSA));
|
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wndClass.style = CS_GLOBALCLASS;
|
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wndClass.lpfnWndProc = (WNDPROC)OLEDD_DragTrackerWindowProc;
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wndClass.cbClsExtra = 0;
|
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wndClass.cbWndExtra = sizeof(TrackerWindowInfo*);
|
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wndClass.hCursor = 0;
|
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wndClass.hbrBackground = 0;
|
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wndClass.lpszClassName = OLEDD_DRAGTRACKERCLASS;
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|
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RegisterClassA (&wndClass);
|
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}
|
|
|
|
/***
|
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* OLEDD_UnInitialize()
|
|
*
|
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* Releases the OLE drag and drop data structures.
|
|
*/
|
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static void OLEDD_UnInitialize()
|
|
{
|
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/*
|
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* Simply empty the list.
|
|
*/
|
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while (targetListHead!=NULL)
|
|
{
|
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RevokeDragDrop(targetListHead->hwndTarget);
|
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}
|
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}
|
|
|
|
/***
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|
* OLEDD_InsertDropTarget()
|
|
*
|
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* Insert the target node in the tree.
|
|
*/
|
|
static void OLEDD_InsertDropTarget(DropTargetNode* nodeToAdd)
|
|
{
|
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DropTargetNode* curNode;
|
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DropTargetNode** parentNodeLink;
|
|
|
|
/*
|
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* Iterate the tree to find the insertion point.
|
|
*/
|
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curNode = targetListHead;
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parentNodeLink = &targetListHead;
|
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|
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while (curNode!=NULL)
|
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{
|
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if (nodeToAdd->hwndTarget<curNode->hwndTarget)
|
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{
|
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/*
|
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* If the node we want to add has a smaller HWND, go left
|
|
*/
|
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parentNodeLink = &curNode->prevDropTarget;
|
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curNode = curNode->prevDropTarget;
|
|
}
|
|
else if (nodeToAdd->hwndTarget>curNode->hwndTarget)
|
|
{
|
|
/*
|
|
* If the node we want to add has a larger HWND, go right
|
|
*/
|
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parentNodeLink = &curNode->nextDropTarget;
|
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curNode = curNode->nextDropTarget;
|
|
}
|
|
else
|
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{
|
|
/*
|
|
* The item was found in the list. It shouldn't have been there
|
|
*/
|
|
assert(FALSE);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we get here, we have found a spot for our item. The parentNodeLink
|
|
* pointer points to the pointer that we have to modify.
|
|
* The curNode should be NULL. We just have to establish the link and Voila!
|
|
*/
|
|
assert(curNode==NULL);
|
|
assert(parentNodeLink!=NULL);
|
|
assert(*parentNodeLink==NULL);
|
|
|
|
*parentNodeLink=nodeToAdd;
|
|
}
|
|
|
|
/***
|
|
* OLEDD_ExtractDropTarget()
|
|
*
|
|
* Removes the target node from the tree.
|
|
*/
|
|
static DropTargetNode* OLEDD_ExtractDropTarget(HWND hwndOfTarget)
|
|
{
|
|
DropTargetNode* curNode;
|
|
DropTargetNode** parentNodeLink;
|
|
|
|
/*
|
|
* Iterate the tree to find the insertion point.
|
|
*/
|
|
curNode = targetListHead;
|
|
parentNodeLink = &targetListHead;
|
|
|
|
while (curNode!=NULL)
|
|
{
|
|
if (hwndOfTarget<curNode->hwndTarget)
|
|
{
|
|
/*
|
|
* If the node we want to add has a smaller HWND, go left
|
|
*/
|
|
parentNodeLink = &curNode->prevDropTarget;
|
|
curNode = curNode->prevDropTarget;
|
|
}
|
|
else if (hwndOfTarget>curNode->hwndTarget)
|
|
{
|
|
/*
|
|
* If the node we want to add has a larger HWND, go right
|
|
*/
|
|
parentNodeLink = &curNode->nextDropTarget;
|
|
curNode = curNode->nextDropTarget;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* The item was found in the list. Detach it from it's parent and
|
|
* re-insert it's kids in the tree.
|
|
*/
|
|
assert(parentNodeLink!=NULL);
|
|
assert(*parentNodeLink==curNode);
|
|
|
|
/*
|
|
* We arbitrately re-attach the left sub-tree to the parent.
|
|
*/
|
|
*parentNodeLink = curNode->prevDropTarget;
|
|
|
|
/*
|
|
* And we re-insert the right subtree
|
|
*/
|
|
if (curNode->nextDropTarget!=NULL)
|
|
{
|
|
OLEDD_InsertDropTarget(curNode->nextDropTarget);
|
|
}
|
|
|
|
/*
|
|
* The node we found is still a valid node once we complete
|
|
* the unlinking of the kids.
|
|
*/
|
|
curNode->nextDropTarget=NULL;
|
|
curNode->prevDropTarget=NULL;
|
|
|
|
return curNode;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we get here, the node is not in the tree
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
/***
|
|
* OLEDD_FindDropTarget()
|
|
*
|
|
* Finds information about the drop target.
|
|
*/
|
|
static DropTargetNode* OLEDD_FindDropTarget(HWND hwndOfTarget)
|
|
{
|
|
DropTargetNode* curNode;
|
|
|
|
/*
|
|
* Iterate the tree to find the HWND value.
|
|
*/
|
|
curNode = targetListHead;
|
|
|
|
while (curNode!=NULL)
|
|
{
|
|
if (hwndOfTarget<curNode->hwndTarget)
|
|
{
|
|
/*
|
|
* If the node we want to add has a smaller HWND, go left
|
|
*/
|
|
curNode = curNode->prevDropTarget;
|
|
}
|
|
else if (hwndOfTarget>curNode->hwndTarget)
|
|
{
|
|
/*
|
|
* If the node we want to add has a larger HWND, go right
|
|
*/
|
|
curNode = curNode->nextDropTarget;
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* The item was found in the list.
|
|
*/
|
|
return curNode;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we get here, the item is not in the list
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
/***
|
|
* OLEDD_DragTrackerWindowProc()
|
|
*
|
|
* This method is the WindowProcedure of the drag n drop tracking
|
|
* window. During a drag n Drop operation, an invisible window is created
|
|
* to receive the user input and act upon it. This procedure is in charge
|
|
* of this behavior.
|
|
*/
|
|
static LRESULT WINAPI OLEDD_DragTrackerWindowProc(
|
|
HWND hwnd,
|
|
UINT uMsg,
|
|
WPARAM wParam,
|
|
LPARAM lParam)
|
|
{
|
|
switch (uMsg)
|
|
{
|
|
case WM_CREATE:
|
|
{
|
|
LPCREATESTRUCTA createStruct = (LPCREATESTRUCTA)lParam;
|
|
|
|
SetWindowLongA(hwnd, 0, (LONG)createStruct->lpCreateParams);
|
|
|
|
|
|
break;
|
|
}
|
|
case WM_MOUSEMOVE:
|
|
{
|
|
TrackerWindowInfo* trackerInfo = (TrackerWindowInfo*)GetWindowLongA(hwnd, 0);
|
|
POINT mousePos;
|
|
|
|
/*
|
|
* Get the current mouse position in screen coordinates.
|
|
*/
|
|
mousePos.x = LOWORD(lParam);
|
|
mousePos.y = HIWORD(lParam);
|
|
ClientToScreen(hwnd, &mousePos);
|
|
|
|
/*
|
|
* Track the movement of the mouse.
|
|
*/
|
|
OLEDD_TrackMouseMove(trackerInfo, mousePos, wParam);
|
|
|
|
break;
|
|
}
|
|
case WM_LBUTTONUP:
|
|
case WM_MBUTTONUP:
|
|
case WM_RBUTTONUP:
|
|
case WM_LBUTTONDOWN:
|
|
case WM_MBUTTONDOWN:
|
|
case WM_RBUTTONDOWN:
|
|
{
|
|
TrackerWindowInfo* trackerInfo = (TrackerWindowInfo*)GetWindowLongA(hwnd, 0);
|
|
POINT mousePos;
|
|
|
|
/*
|
|
* Get the current mouse position in screen coordinates.
|
|
*/
|
|
mousePos.x = LOWORD(lParam);
|
|
mousePos.y = HIWORD(lParam);
|
|
ClientToScreen(hwnd, &mousePos);
|
|
|
|
/*
|
|
* Notify everyone that the button state changed
|
|
* TODO: Check if the "escape" key was pressed.
|
|
*/
|
|
OLEDD_TrackStateChange(trackerInfo, mousePos, wParam);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is a window proc after all. Let's call the default.
|
|
*/
|
|
return DefWindowProcA (hwnd, uMsg, wParam, lParam);
|
|
}
|
|
|
|
/***
|
|
* OLEDD_TrackMouseMove()
|
|
*
|
|
* This method is invoked while a drag and drop operation is in effect.
|
|
* it will generate the appropriate callbacks in the drop source
|
|
* and drop target. It will also provide the expected feedback to
|
|
* the user.
|
|
*
|
|
* params:
|
|
* trackerInfo - Pointer to the structure identifying the
|
|
* drag & drop operation that is currently
|
|
* active.
|
|
* mousePos - Current position of the mouse in screen
|
|
* coordinates.
|
|
* keyState - Contains the state of the shift keys and the
|
|
* mouse buttons (MK_LBUTTON and the like)
|
|
*/
|
|
static void OLEDD_TrackMouseMove(
|
|
TrackerWindowInfo* trackerInfo,
|
|
POINT mousePos,
|
|
DWORD keyState)
|
|
{
|
|
HWND hwndNewTarget = 0;
|
|
HRESULT hr = S_OK;
|
|
|
|
/*
|
|
* Get the handle of the window under the mouse
|
|
*/
|
|
hwndNewTarget = WindowFromPoint(mousePos);
|
|
|
|
/*
|
|
* If we are hovering over the same target as before, send the
|
|
* DragOver notification
|
|
*/
|
|
if ( (trackerInfo->curDragTarget != 0) &&
|
|
(trackerInfo->curDragTargetHWND==hwndNewTarget) )
|
|
{
|
|
POINTL mousePosParam;
|
|
|
|
/*
|
|
* The documentation tells me that the coordinate should be in the target
|
|
* window's coordinate space. However, the tests I made tell me the
|
|
* coordinates should be in screen coordinates.
|
|
*/
|
|
mousePosParam.x = mousePos.x;
|
|
mousePosParam.y = mousePos.y;
|
|
|
|
IDropTarget_DragOver(trackerInfo->curDragTarget,
|
|
keyState,
|
|
mousePosParam,
|
|
trackerInfo->pdwEffect);
|
|
}
|
|
else
|
|
{
|
|
DropTargetNode* newDropTargetNode = 0;
|
|
|
|
/*
|
|
* If we changed window, we have to notify our old target and check for
|
|
* the new one.
|
|
*/
|
|
if (trackerInfo->curDragTarget!=0)
|
|
{
|
|
IDropTarget_DragLeave(trackerInfo->curDragTarget);
|
|
}
|
|
|
|
/*
|
|
* Make sure we're hovering over a window.
|
|
*/
|
|
if (hwndNewTarget!=0)
|
|
{
|
|
/*
|
|
* Find-out if there is a drag target under the mouse
|
|
*/
|
|
newDropTargetNode = OLEDD_FindDropTarget(hwndNewTarget);
|
|
|
|
trackerInfo->curDragTargetHWND = hwndNewTarget;
|
|
trackerInfo->curDragTarget = newDropTargetNode ? newDropTargetNode->dropTarget : 0;
|
|
|
|
/*
|
|
* If there is, notify it that we just dragged-in
|
|
*/
|
|
if (trackerInfo->curDragTarget!=0)
|
|
{
|
|
POINTL mousePosParam;
|
|
|
|
/*
|
|
* The documentation tells me that the coordinate should be in the target
|
|
* window's coordinate space. However, the tests I made tell me the
|
|
* coordinates should be in screen coordinates.
|
|
*/
|
|
mousePosParam.x = mousePos.x;
|
|
mousePosParam.y = mousePos.y;
|
|
|
|
IDropTarget_DragEnter(trackerInfo->curDragTarget,
|
|
trackerInfo->dataObject,
|
|
keyState,
|
|
mousePosParam,
|
|
trackerInfo->pdwEffect);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* The mouse is not over a window so we don't track anything.
|
|
*/
|
|
trackerInfo->curDragTargetHWND = 0;
|
|
trackerInfo->curDragTarget = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that we have done that, we have to tell the source to give
|
|
* us feedback on the work being done by the target. If we don't
|
|
* have a target, simulate no effect.
|
|
*/
|
|
if (trackerInfo->curDragTarget==0)
|
|
{
|
|
*trackerInfo->pdwEffect = DROPEFFECT_NONE;
|
|
}
|
|
|
|
hr = IDropSource_GiveFeedback(trackerInfo->dropSource,
|
|
*trackerInfo->pdwEffect);
|
|
|
|
/*
|
|
* When we ask for feedback from the drop source, sometimes it will
|
|
* do all the necessary work and sometimes it will not handle it
|
|
* when that's the case, we must display the standard drag and drop
|
|
* cursors.
|
|
*/
|
|
if (hr==DRAGDROP_S_USEDEFAULTCURSORS)
|
|
{
|
|
if ( (*trackerInfo->pdwEffect & DROPEFFECT_MOVE) ||
|
|
(*trackerInfo->pdwEffect & DROPEFFECT_COPY) ||
|
|
(*trackerInfo->pdwEffect & DROPEFFECT_LINK) )
|
|
{
|
|
SetCursor(LoadCursorA(0, IDC_SIZEALLA));
|
|
}
|
|
else
|
|
{
|
|
SetCursor(LoadCursorA(0, IDC_NOA));
|
|
}
|
|
}
|
|
}
|
|
|
|
/***
|
|
* OLEDD_TrackStateChange()
|
|
*
|
|
* This method is invoked while a drag and drop operation is in effect.
|
|
* It is used to notify the drop target/drop source callbacks when
|
|
* the state of the keyboard or mouse button change.
|
|
*
|
|
* params:
|
|
* trackerInfo - Pointer to the structure identifying the
|
|
* drag & drop operation that is currently
|
|
* active.
|
|
* mousePos - Current position of the mouse in screen
|
|
* coordinates.
|
|
* keyState - Contains the state of the shift keys and the
|
|
* mouse buttons (MK_LBUTTON and the like)
|
|
*/
|
|
static void OLEDD_TrackStateChange(
|
|
TrackerWindowInfo* trackerInfo,
|
|
POINT mousePos,
|
|
DWORD keyState)
|
|
{
|
|
/*
|
|
* Ask the drop source what to do with the operation.
|
|
*/
|
|
trackerInfo->returnValue = IDropSource_QueryContinueDrag(
|
|
trackerInfo->dropSource,
|
|
trackerInfo->escPressed,
|
|
keyState);
|
|
|
|
/*
|
|
* All the return valued will stop the operation except the S_OK
|
|
* return value.
|
|
*/
|
|
if (trackerInfo->returnValue!=S_OK)
|
|
{
|
|
/*
|
|
* Make sure the message loop in DoDragDrop stops
|
|
*/
|
|
trackerInfo->trackingDone = TRUE;
|
|
|
|
/*
|
|
* Release the mouse in case the drop target decides to show a popup
|
|
* or a menu or something.
|
|
*/
|
|
ReleaseCapture();
|
|
|
|
/*
|
|
* If we end-up over a target, drop the object in the target or
|
|
* inform the target that the operation was cancelled.
|
|
*/
|
|
if (trackerInfo->curDragTarget!=0)
|
|
{
|
|
switch (trackerInfo->returnValue)
|
|
{
|
|
/*
|
|
* If the source wants us to complete the operation, we tell
|
|
* the drop target that we just dropped the object in it.
|
|
*/
|
|
case DRAGDROP_S_DROP:
|
|
{
|
|
POINTL mousePosParam;
|
|
|
|
/*
|
|
* The documentation tells me that the coordinate should be
|
|
* in the target window's coordinate space. However, the tests
|
|
* I made tell me the coordinates should be in screen coordinates.
|
|
*/
|
|
mousePosParam.x = mousePos.x;
|
|
mousePosParam.y = mousePos.y;
|
|
|
|
IDropTarget_Drop(trackerInfo->curDragTarget,
|
|
trackerInfo->dataObject,
|
|
keyState,
|
|
mousePosParam,
|
|
trackerInfo->pdwEffect);
|
|
break;
|
|
}
|
|
/*
|
|
* If the source told us that we should cancel, fool the drop
|
|
* target by telling it that the mouse left it's window.
|
|
*/
|
|
case DRAGDROP_S_CANCEL:
|
|
IDropTarget_DragLeave(trackerInfo->curDragTarget);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/***
|
|
* OLEDD_GetButtonState()
|
|
*
|
|
* This method will use the current state of the keyboard to build
|
|
* a button state mask equivalent to the one passed in the
|
|
* WM_MOUSEMOVE wParam.
|
|
*/
|
|
static DWORD OLEDD_GetButtonState()
|
|
{
|
|
BYTE keyboardState[256];
|
|
DWORD keyMask = 0;
|
|
|
|
GetKeyboardState(keyboardState);
|
|
|
|
if ( (keyboardState[VK_SHIFT] & 0x80) !=0)
|
|
keyMask |= MK_SHIFT;
|
|
|
|
if ( (keyboardState[VK_CONTROL] & 0x80) !=0)
|
|
keyMask |= MK_CONTROL;
|
|
|
|
if ( (keyboardState[VK_LBUTTON] & 0x80) !=0)
|
|
keyMask |= MK_LBUTTON;
|
|
|
|
if ( (keyboardState[VK_RBUTTON] & 0x80) !=0)
|
|
keyMask |= MK_RBUTTON;
|
|
|
|
if ( (keyboardState[VK_MBUTTON] & 0x80) !=0)
|
|
keyMask |= MK_MBUTTON;
|
|
|
|
return keyMask;
|
|
}
|
|
|
|
|