You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.3 KiB
77 lines
2.3 KiB
//**********************************************************************
|
|
// File name: idt.h
|
|
//
|
|
// Definition of CDropTarget
|
|
//
|
|
// Copyright (c) 1992 - 1993 Microsoft Corporation. All rights reserved.
|
|
//**********************************************************************
|
|
#if !defined( _IDT_H_ )
|
|
#define _IDT_H_
|
|
|
|
#include <assert.h>
|
|
|
|
class CSimpleDoc;
|
|
|
|
/* Flags to control direction for drag scrolling */
|
|
typedef enum tagSCROLLDIR {
|
|
SCROLLDIR_NULL = 0,
|
|
SCROLLDIR_UP = 1,
|
|
SCROLLDIR_DOWN = 2,
|
|
SCROLLDIR_RIGHT = 3,
|
|
SCROLLDIR_LEFT = 4
|
|
} SCROLLDIR;
|
|
|
|
interface CDropTarget : public IDropTarget
|
|
{
|
|
int m_nCount; // reference count
|
|
CSimpleDoc FAR * m_pDoc;
|
|
BOOL m_fCanDropCopy;
|
|
BOOL m_fCanDropLink;
|
|
DWORD m_dwSrcAspect;
|
|
RECT m_rcDragRect;
|
|
POINT m_ptLast;
|
|
BOOL m_fDragFeedbackDrawn;
|
|
DWORD m_dwTimeEnterScrollArea; // time of entering scroll border region
|
|
DWORD m_dwLastScrollDir; // current dir for drag scroll
|
|
DWORD m_dwNextScrollTime; // time for next scroll
|
|
|
|
CDropTarget(CSimpleDoc FAR * pDoc) {
|
|
TestDebugOut("In IDT's constructor\r\n");
|
|
m_pDoc = pDoc;
|
|
m_nCount = 0;
|
|
m_fCanDropCopy = FALSE;
|
|
m_fCanDropLink = FALSE;
|
|
m_fDragFeedbackDrawn = FALSE;
|
|
m_dwTimeEnterScrollArea = 0L;
|
|
m_dwNextScrollTime = 0L;
|
|
m_dwLastScrollDir = SCROLLDIR_NULL;
|
|
};
|
|
|
|
~CDropTarget() {
|
|
TestDebugOut("In IDT's destructor\r\n");
|
|
assert(m_nCount == 0);
|
|
} ;
|
|
|
|
STDMETHODIMP QueryInterface (REFIID riid, LPVOID FAR* ppv);
|
|
STDMETHODIMP_(ULONG) AddRef ();
|
|
STDMETHODIMP_(ULONG) Release ();
|
|
|
|
// *** IDropTarget methods ***
|
|
STDMETHODIMP DragEnter (LPDATAOBJECT pDataObj, DWORD grfKeyState,
|
|
POINTL pt, LPDWORD pdwEffect);
|
|
STDMETHODIMP DragOver (DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect);
|
|
STDMETHODIMP DragLeave ();
|
|
STDMETHODIMP Drop (LPDATAOBJECT pDataObj, DWORD grfKeyState, POINTL pt,
|
|
LPDWORD pdwEffect);
|
|
|
|
private:
|
|
// Drag/Drop support methods
|
|
BOOL QueryDrop (DWORD grfKeyState, POINTL pointl, BOOL fDragScroll,
|
|
LPDWORD lpdwEffect);
|
|
BOOL DoDragScroll( POINTL pointl );
|
|
void InitDragFeedback(LPDATAOBJECT pDataObj, POINTL pointl);
|
|
void DrawDragFeedback( POINTL pointl );
|
|
void UndrawDragFeedback( void );
|
|
};
|
|
|
|
#endif // _IDT_H_
|