Re: EM_SETOLECALLBACK
From: anony*mouse (anonytmouse_at_subdimension.com)
Date: 04/05/04
- Next message: nikos: "Re: Drag and drop and IAsyncOperation problems"
- Previous message: Gareth: "COM Add-ins and Keyboard Hooks/Child Windows"
- In reply to: Mike H: "EM_SETOLECALLBACK"
- Next in thread: Mike H: "Re: EM_SETOLECALLBACK"
- Reply: Mike H: "Re: EM_SETOLECALLBACK"
- Messages sorted by: [ date ] [ thread ]
Date: 5 Apr 2004 03:19:38 -0700
"Mike H" <mikehg1@removethis foraccess-4-free.com> wrote in message news:<5686b119ee3f1905314684af40f88ef0@news.teranews.com>...
> Does anyone have a working example of how to setup the olecallback for a
> richedit control. I'm pretty much an idiot when it comes to this com/ole
> stuff, so any info would be greatly appreciated. Plain C would be the
> preferred language.
Here is a working implementation of IRichEditOleCallback in plain C
(tested with MSVC7 and LCC-WIN32).
[code]
#include <objbase.h>
#include <richedit.h>
#include <richole.h>
#include <stdlib.h>
#include <stddef.h>
// --- Utility macros ---
#define OleQueryInterface(this, riid, ppv) \
(this)->lpVtbl->QueryInterface(this, riid, ppv)
#define OleAddRef(this) \
(this)->lpVtbl->AddRef(this)
#define OleRelease(this) \
(this)->lpVtbl->Release(this)
#define IMPL(class, member) \
(&((class *)0)->member == This, \
((class *) (((INT_PTR) This) - offsetof (class, member))))
#undef INTERFACE
#define INTERFACE IRichEditOleCallback
typedef struct tagCReCallback {
INTERFACE IRichEditOleCallbackIFace;
ULONG cRef;
/* Declare any class data you need here */
} CReCallback;
// --- IUnknown methods ---
static STDMETHODIMP IREOC_QueryInterface(THIS_ REFIID riid, void **
ppv)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
if (IsEqualIID (riid, &IID_IUnknown) ||
IsEqualIID (riid, &IID_IRichEditOleCallback))
{
*ppv = &ThisObj->IRichEditOleCallbackIFace;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
OleAddRef ((INTERFACE *) *ppv);
return NOERROR;
}
static STDMETHODIMP_(ULONG) IREOC_AddRef(THIS)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return InterlockedIncrement(&ThisObj->cRef);
}
static STDMETHODIMP_(ULONG) IREOC_Release(THIS)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
if (InterlockedDecrement(&ThisObj->cRef) == 0)
{
free(ThisObj);
return 0;
}
return ThisObj->cRef;
}
// --- IRichEditOleCallback methods ---
static STDMETHODIMP IREOC_GetNewStorage(THIS_ LPSTORAGE * lplpstg)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_GetInPlaceContext(THIS_
LPOLEINPLACEFRAME * lplpFrame,
LPOLEINPLACEUIWINDOW * lplpDoc,
LPOLEINPLACEFRAMEINFO
lpFrameInfo)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_ShowContainerUI(THIS_ BOOL fShow)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_QueryInsertObject(THIS_ LPCLSID lpclsid,
LPSTORAGE lpstg, LONG cp)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_DeleteObject(THIS_ LPOLEOBJECT lpoleobj)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_QueryAcceptData(THIS_ LPDATAOBJECT
lpdataobj,
CLIPFORMAT * lpcfFormat, DWORD
reco,
BOOL fReally, HGLOBAL hMetaPict)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_ContextSensitiveHelp(THIS_ BOOL fEnterMode)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_GetClipboardData(THIS_ CHARRANGE * lpchrg,
DWORD reco,
LPDATAOBJECT * lplpdataobj)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
MessageBox(NULL, TEXT("### GetClipboardData"), NULL, 0);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_GetDragDropEffect(THIS_ BOOL fDrag,
DWORD grfKeyState,
LPDWORD pdwEffect)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static STDMETHODIMP IREOC_GetContextMenu(THIS_ WORD seltype,
LPOLEOBJECT lpoleobj,
CHARRANGE * lpchrg,
HMENU * lphmenu)
{
CReCallback * ThisObj = IMPL(CReCallback,
IRichEditOleCallbackIFace);
return E_NOTIMPL;
}
static const IRichEditOleCallbackVtbl vtblIRichEditOleCallback = {
IREOC_QueryInterface, IREOC_AddRef, IREOC_Release,
IREOC_GetNewStorage, IREOC_GetInPlaceContext,
IREOC_ShowContainerUI, IREOC_QueryInsertObject,
IREOC_DeleteObject, IREOC_QueryAcceptData,
IREOC_ContextSensitiveHelp, IREOC_GetClipboardData,
IREOC_GetDragDropEffect, IREOC_GetContextMenu
};
CReCallback * new_CReCallback(void)
{
CReCallback * ThisObj = calloc(1, sizeof(CReCallback));
if (ThisObj)
{
ThisObj->cRef = 1;
ThisObj->IRichEditOleCallbackIFace.lpVtbl =
(IRichEditOleCallbackVtbl *) &vtblIRichEditOleCallback;
}
return ThisObj;
}
void delete_CReCallback(CReCallback * pCallback)
{
OleRelease(&pCallback->IRichEditOleCallbackIFace);
}
[/code]
The header for all that is:
[header]
typedef struct tagCReCallback CReCallback;
CReCallback * new_CReCallback(void);
void delete_CReCallback(CReCallback * pCallback);
[/header]
and to hook it up to your rich edit control:
[code]
CReCallback * pCallback = new_CReCallback();
SendMessage(hwndRichEdit, EM_SETOLECALLBACK, 0, (LPARAM)
pCallback);
delete_CReCallback(pCallback);
[/code]
As it stands the ten callback functions simply do nothing and return
E_NOTIMPL. It is your responsibility to add code and return an
appropriate value.
You can add calls to MessageBox() or OutputDebugString() to trace
incoming calls as demonstrated in IREOC_GetClipboardData() above.
If you would like further information on implementing COM interfaces
in plain C you should start with the COM programmer's cookbook(at
least the first half):
http://msdn.microsoft.com/library/techart/msdn_com_co.htm
Another good article is "Display a Web Page in a Plain C Win32
Application":
http://www.codeguru.com/Cpp/I-N/ieprogram/article.php/c4379/
You can find implementations in plain C for many COM interfaces by
searching for the interface name along with "lpVtbl". Searching for
"IRichEditOleCallback lpVtbl" produces this result:
http://cvs.sourceforge.net/viewcvs.py/miranda-icq/Plugins/srmm/msgs.c?rev=1.15
NOTE: My email address is invalid.
- Next message: nikos: "Re: Drag and drop and IAsyncOperation problems"
- Previous message: Gareth: "COM Add-ins and Keyboard Hooks/Child Windows"
- In reply to: Mike H: "EM_SETOLECALLBACK"
- Next in thread: Mike H: "Re: EM_SETOLECALLBACK"
- Reply: Mike H: "Re: EM_SETOLECALLBACK"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
