mirror of https://github.com/tongzx/nt5src
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.
330 lines
7.8 KiB
330 lines
7.8 KiB
//**********************************************************************
|
|
// File name: IDS.CPP
|
|
//
|
|
// Implementation file for CDropSource
|
|
//
|
|
// Functions:
|
|
//
|
|
// See IDS.H for class definition
|
|
//
|
|
// Copyright (c) 1992 - 1993 Microsoft Corporation. All rights reserved.
|
|
//**********************************************************************
|
|
|
|
#include "pre.h"
|
|
#include "doc.h"
|
|
#include "site.h"
|
|
#include "dxferobj.h"
|
|
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CSimpleDoc::QueryDrag
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Check to see if Drag operation should be initiated based on the
|
|
// current position of the mouse.
|
|
//
|
|
// Parameters:
|
|
//
|
|
// POINT pt - position of mouse
|
|
//
|
|
// Return Value:
|
|
//
|
|
// BOOL - TRUE if drag should take place,
|
|
// else FALSE
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// CSimpleSite::GetObjRect SITE.CPP
|
|
// PtInRect Windows API
|
|
//
|
|
// Comments:
|
|
//
|
|
//********************************************************************
|
|
|
|
BOOL CSimpleDoc::QueryDrag(POINT pt)
|
|
{
|
|
// if pt is within rect of object, then start drag
|
|
if (m_lpSite)
|
|
{
|
|
RECT rect;
|
|
m_lpSite->GetObjRect(&rect);
|
|
return ( PtInRect(&rect, pt) ? TRUE : FALSE );
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CSimpleDoc::DoDragDrop
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Actually perform a drag/drop operation with the current
|
|
// selection in the source document.
|
|
//
|
|
// Parameters:
|
|
//
|
|
// none.
|
|
//
|
|
// Return Value:
|
|
//
|
|
// DWORD - returns the result effect of the
|
|
// drag/drop operation:
|
|
// DROPEFFECT_NONE,
|
|
// DROPEFFECT_COPY,
|
|
// DROPEFFECT_MOVE, or
|
|
// DROPEFFECT_LINK
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// CDataXferObj::Create DXFEROBJ.CPP
|
|
// CDataXferObj::QueryInterface DXFEROBJ.CPP
|
|
// CDataXferObj::Release DXFEROBJ.CPP
|
|
// DoDragDrop OLE API
|
|
// TestDebugOut Windows API
|
|
//
|
|
// Comments:
|
|
//
|
|
//********************************************************************
|
|
|
|
DWORD CSimpleDoc::DoDragDrop (void)
|
|
{
|
|
DWORD dwEffect = 0;
|
|
LPDATAOBJECT lpDataObj;
|
|
|
|
TestDebugOut("In CSimpleDoc::DoDragDrop\r\n");
|
|
|
|
// Create a data transfer object by cloning the existing OLE object
|
|
CDataXferObj FAR* pDataXferObj = CDataXferObj::Create(m_lpSite,NULL);
|
|
|
|
if (! pDataXferObj) {
|
|
MessageBox(NULL,"Out-of-memory","SimpDnD",MB_SYSTEMMODAL|MB_ICONHAND);
|
|
return DROPEFFECT_NONE;
|
|
}
|
|
|
|
// initially obj is created with 0 refcnt. this QI will make it go to 1.
|
|
pDataXferObj->QueryInterface(IID_IDataObject, (LPVOID FAR*)&lpDataObj);
|
|
assert(lpDataObj);
|
|
|
|
m_fLocalDrop = FALSE;
|
|
m_fLocalDrag = TRUE;
|
|
|
|
::DoDragDrop ( lpDataObj,
|
|
&m_DropSource,
|
|
DROPEFFECT_COPY, // we only allow copy
|
|
&dwEffect
|
|
);
|
|
|
|
m_fLocalDrag = FALSE;
|
|
|
|
/* if after the Drag/Drop modal (mouse capture) loop is finished
|
|
** and a drag MOVE operation was performed, then we must delete
|
|
** the selection that was dragged.
|
|
*/
|
|
if ( (dwEffect & DROPEFFECT_MOVE) != 0 ) {
|
|
// ... delete source object here (we do NOT support MOVE)
|
|
}
|
|
|
|
pDataXferObj->Release(); // this should destroy the DataXferObj
|
|
return dwEffect;
|
|
}
|
|
|
|
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CDropSource::QueryInterface
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Return a pointer to a requested interface
|
|
//
|
|
// Parameters:
|
|
//
|
|
// REFIID riid - ID of interface to be returned
|
|
// LPVOID FAR* ppvObj - Location to return the interface
|
|
//
|
|
// Return Value:
|
|
//
|
|
// S_OK - Interface supported
|
|
// E_NOINTERFACE - Interface NOT supported
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// TestDebugOut Windows API
|
|
// CSimpleDoc::QueryInterface DOC.CPP
|
|
//
|
|
// Comments:
|
|
//
|
|
//********************************************************************
|
|
|
|
STDMETHODIMP CDropSource::QueryInterface(REFIID riid, LPVOID FAR* ppvObj)
|
|
{
|
|
TestDebugOut("In IDS::QueryInterface\r\n");
|
|
|
|
// delegate to the document
|
|
return m_pDoc->QueryInterface(riid, ppvObj);
|
|
}
|
|
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CDropSource::AddRef
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Increments the reference count on this interface
|
|
//
|
|
// Parameters:
|
|
//
|
|
// None
|
|
//
|
|
// Return Value:
|
|
//
|
|
// The current reference count on this interface.
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// CSimpleObj::AddReff OBJ.CPP
|
|
// TestDebugOut Windows API
|
|
//
|
|
// Comments:
|
|
//
|
|
// This function adds one to the ref count of the interface,
|
|
// and calls then calls CSimpleDoc to increment its ref.
|
|
// count.
|
|
//
|
|
//********************************************************************
|
|
|
|
STDMETHODIMP_(ULONG) CDropSource::AddRef()
|
|
{
|
|
TestDebugOut("In IDS::AddRef\r\n");
|
|
|
|
// increment the interface reference count (for debugging only)
|
|
++m_nCount;
|
|
|
|
// delegate to the document Object
|
|
return m_pDoc->AddRef();
|
|
}
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CDropSource::Release
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Decrements the reference count on this interface
|
|
//
|
|
// Parameters:
|
|
//
|
|
// None
|
|
//
|
|
// Return Value:
|
|
//
|
|
// The current reference count on this interface.
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// CSimpleObj::Release OBJ.CPP
|
|
// TestDebugOut Windows API
|
|
//
|
|
// Comments:
|
|
//
|
|
// This function subtracts one from the ref count of the interface,
|
|
// and calls then calls CSimpleDoc to decrement its ref.
|
|
// count.
|
|
//
|
|
//********************************************************************
|
|
|
|
STDMETHODIMP_(ULONG) CDropSource::Release()
|
|
{
|
|
TestDebugOut("In IDS::Release\r\n");
|
|
|
|
// decrement the interface reference count (for debugging only)
|
|
--m_nCount;
|
|
|
|
// delegate to the document object
|
|
return m_pDoc->Release();
|
|
}
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CDropSource::QueryContinueDrag
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Called to determine if a drop should take place or be canceled.
|
|
//
|
|
// Parameters:
|
|
//
|
|
// BOOL fEscapePressed - TRUE if ESCAPE key has been pressed
|
|
// DWORD grfKeyState - key state
|
|
//
|
|
// Return Value:
|
|
//
|
|
// DRAGDROP_S_CANCEL - drag operation should be canceled
|
|
// DRAGDROP_S_DROP - drop operation should be performed
|
|
// S_OK - dragging should continue
|
|
//
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// ResultFromScode OLE API
|
|
//
|
|
// Comments:
|
|
//
|
|
//********************************************************************
|
|
|
|
STDMETHODIMP CDropSource::QueryContinueDrag (
|
|
BOOL fEscapePressed,
|
|
DWORD grfKeyState
|
|
)
|
|
{
|
|
if (fEscapePressed)
|
|
return ResultFromScode(DRAGDROP_S_CANCEL);
|
|
else if (!(grfKeyState & MK_LBUTTON))
|
|
return ResultFromScode(DRAGDROP_S_DROP);
|
|
else
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
//**********************************************************************
|
|
//
|
|
// CDropSource::GiveFeedback
|
|
//
|
|
// Purpose:
|
|
//
|
|
// Called to set cursor feedback
|
|
//
|
|
// Parameters:
|
|
//
|
|
// DWORD dwEffect - drop operation to give feedback for
|
|
//
|
|
// Return Value:
|
|
//
|
|
// DRAGDROP_S_USEDEFAULTCURSORS - tells OLE to use standard cursors
|
|
//
|
|
// Function Calls:
|
|
// Function Location
|
|
//
|
|
// ResultFromScode OLE API
|
|
//
|
|
// Comments:
|
|
//
|
|
//********************************************************************
|
|
|
|
STDMETHODIMP CDropSource::GiveFeedback (DWORD dwEffect)
|
|
{
|
|
return ResultFromScode(DRAGDROP_S_USEDEFAULTCURSORS);
|
|
}
|