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windows-nt/Source/XPSP1/NT/com/winole/samples/srvrdemo/obj.c

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2020-09-26 03:20:57 -05:00
/*
OLE SERVER DEMO
Obj.c
This file contains object methods and various object-related support
functions.
(c) Copyright Microsoft Corp. 1990 - 1992 All Rights Reserved
*/
/*
Important Note:
No method should ever dispatch a DDE message or allow a DDE message to
be dispatched.
Therefore, no method should ever enter a message dispatch loop.
Also, a method should not show a dialog or message box, because the
processing of the dialog box messages will allow DDE messages to be
dispatched.
*/
#define SERVERONLY
#include <windows.h>
#include <ole.h>
#include "srvrdemo.h"
// Static functions.
static HBITMAP GetBitmap (LPOBJ lpobj);
static HANDLE GetLink (LPOBJ lpobj);
static HANDLE GetMetafilePict (LPOBJ lpobj);
static HANDLE GetEnhMetafile (LPOBJ lpobj);
static HANDLE GetNative (LPOBJ lpobj);
static INT GetObjNum (LPOBJ lpobj);
static HANDLE GetText (LPOBJ lpobj);
static VOID DrawObj (HDC hdc, LPOBJ lpobj, RECT rc, INT dctype);
/* CreateNewObj
* ------------
*
* BOOL fDoc_Changed - The new value for the global variable fDocChanged.
* When initializing a new document, we need to create
* a new object without the creation counting as a
* change to the document.
*
* RETURNS: A pointer to the new object
*
*
* CUSTOMIZATION: Re-implement
* Some applications (like Server Demo) have a finite number of
* fixed, distinct, non-overlapping objects. Other applications
* allow the user to create an object from any section of the
* document. For example, the user might select a portion of
* a bitmap from a paint program, or a few lines of text from
* a word processor. This latter type of application probably
* will not have a function like CreateNewObj.
*
*/
LPOBJ CreateNewObj (BOOL fDoc_Changed)
{
HANDLE hObj = NULL;
LPOBJ lpobj = NULL;
// index into an array of flags indicating if that object number is used.
INT ifObj = 0;
if ((hObj = LocalAlloc (LMEM_MOVEABLE|LMEM_ZEROINIT, sizeof (OBJ))) == NULL)
return NULL;
if ((lpobj = (LPOBJ) LocalLock (hObj)) == NULL)
{
LocalFree (hObj);
return NULL;
}
// Fill the fields in the object structure.
// Find an unused number.
for (ifObj=1; ifObj <= cfObjNums; ifObj++)
{
if (docMain.rgfObjNums[ifObj]==FALSE)
{
docMain.rgfObjNums[ifObj]=TRUE;
break;
}
}
if (ifObj==cfObjNums+1)
{
// Cannot create any more objects.
MessageBeep(0);
return NULL;
}
wsprintf (lpobj->native.szName, "Object %d", ifObj);
lpobj->aName = GlobalAddAtom (lpobj->native.szName);
lpobj->hObj = hObj;
lpobj->oleobject.lpvtbl = &objvtbl;
lpobj->native.idmColor = IDM_RED; // Default color
lpobj->native.version = version;
lpobj->native.nWidth = OBJECT_WIDTH; // Default size
lpobj->native.nHeight = OBJECT_HEIGHT;
SetHiMetricFields (lpobj);
// Place object in a location corrsponding to its number, for aesthetics.
lpobj->native.nX = (ifObj - 1) * 20;
lpobj->native.nY = (ifObj - 1) * 20;
if (!CreateWindow (
"ObjClass",
"Obj",
WS_BORDER | WS_THICKFRAME | WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE,
lpobj->native.nX,
lpobj->native.nY,
lpobj->native.nWidth,
lpobj->native.nHeight,
hwndMain,
NULL,
hInst,
(LPSTR) lpobj ))
return FALSE;
fDocChanged = fDoc_Changed;
return lpobj;
}
/* CutOrCopyObj
* ------------
*
* Put data onto clipboard in all the formats supported. If the
* fOpIsCopy is TRUE, the operation is COPY, otherwise it is CUT.
* This is important, because we cannot put the Object Link format
* onto the clipboard if the object was cut from the document (there is
* no longer anything to link to).
*
* BOOL fOpIsCopy - TRUE if the operation is COPY; FALSE if CUT
*
* CUSTOMIZATION: None
*
*
*/
VOID CutOrCopyObj (BOOL fOpIsCopy)
{
LPOBJ lpobj;
HANDLE hData;
// UINT hBit;
if (OpenClipboard (hwndMain))
{
EmptyClipboard ();
lpobj = SelectedObject();
if ((hData = GetNative (lpobj)) != NULL)
SetClipboardData(cfNative, hData);
if ((hData = GetLink(lpobj)) != NULL)
SetClipboardData(cfOwnerLink, hData);
if (fOpIsCopy && docMain.doctype == doctypeFromFile)
{
// Can create a link if object exists in a file.
if ((hData = GetLink(lpobj)) != NULL)
SetClipboardData(cfObjectLink, hData);
}
if ((hData = GetEnhMetafile(lpobj)) != NULL)
{
SetClipboardData(CF_ENHMETAFILE, hData);
GlobalFree(hData);
}
if ((hData = GetBitmap(lpobj)) != NULL)
{
// SetClipboardData(CF_BITMAP, GetBitmap(lpobj));
SetClipboardData(CF_BITMAP, hData);
DeleteObject(hData);
}
CloseClipboard ();
}
}
/* DestroyObj
* ----------
*
* Revoke an object, and free all memory that had been allocated for it.
*
* HWND hwnd - The object's window
*
* CUSTOMIZATION: Re-implement, making sure you free all the memory that
* had been allocated for the OBJ structure and each of its
* fields.
*
*/
VOID DestroyObj (HWND hwnd)
{
LPOBJ lpobj = HwndToLpobj (hwnd);
if(lpobj->aName)
{
GlobalDeleteAtom (lpobj->aName);
lpobj->aName = '\0';
}
if (lpobj->hpal)
DeleteObject (lpobj->hpal);
// Allow the object's number to be reused.
docMain.rgfObjNums [GetObjNum(lpobj)] = FALSE;
// Free the memory that had been allocated for the object structure itself.
LocalUnlock (lpobj->hObj);
LocalFree (lpobj->hObj);
}
/* DrawObj
* -------
*
* This function draws an object onto the screen, into a metafile, or into
* a bitmap.
* The object will always look the same.
*
* HDC hdc - The device context to render the object into
* LPOBJ lpobj - The object to render
* RECT rc - The rectangle bounds of the object
* DCTYPE dctype - The type of device context.
*
* CUSTOMIZATION: Server Demo specific
*
*/
static VOID DrawObj (HDC hdc, LPOBJ lpobj, RECT rc, INT dctype)
{
HPEN hpen;
HPEN hpenOld;
HPALETTE hpalOld = NULL;
if (dctype == dctypeMetafile)
{
SetWindowOrgEx (hdc, 0, 0, NULL);
// Paint entire object into the given rectangle.
SetWindowExtEx (hdc, rc.right, rc.bottom, NULL);
}
if (lpobj->hpal)
{
hpalOld = SelectPalette (hdc, lpobj->hpal, TRUE);
RealizePalette (hdc);
}
// Select brush of the color specified in the native data.
SelectObject (hdc, hbrColor [lpobj->native.idmColor - IDM_RED] );
hpen = CreatePen (PS_SOLID,
/* Width */ (rc.bottom-rc.top) / 10,
/* Gray */ 0x00808080);
hpenOld = SelectObject (hdc, hpen);
// Draw rectangle with the gray pen and fill it in with the selected brush.
Rectangle(hdc, rc.left, rc.top, rc.right, rc.bottom);
// Print name of object inside rectangle.
SetBkMode (hdc, TRANSPARENT);
SetTextAlign (hdc, TA_BASELINE | TA_CENTER);
TextOut (hdc,
rc.right/2,
(rc.top+rc.bottom)/2,
lpobj->native.szName,
lstrlen (lpobj->native.szName));
// Restore original objects
SelectObject (hdc,
(dctype == dctypeMetafile || dctype == dctypeEnhMetafile)
? GetStockObject (BLACK_PEN) : hpenOld);
if (hpalOld)
{
SelectPalette (hdc,
(dctype == dctypeMetafile || dctype == dctypeEnhMetafile)
? GetStockObject (DEFAULT_PALETTE) : hpalOld,
TRUE);
}
DeleteObject (hpen);
}
/* GetBitmap
* ---------
*
* Return a handle to an object's picture data in bitmap format.
*
* LPOBJ lpobj - The object
*
* RETURNS: A handle to the object's picture data
*
* CUSTOMIZATION: Re-implement
*
*/
static HBITMAP GetBitmap (LPOBJ lpobj)
{
HDC hdcObj;
HDC hdcMem;
RECT rc;
HBITMAP hbitmap;
HBITMAP hbitmapOld;
hdcObj = GetDC (lpobj->hwnd);
// Create a memory device context.
hdcMem = CreateCompatibleDC (hdcObj);
GetClientRect (lpobj->hwnd, (LPRECT)&rc);
// Create new bitmap object based on the bitmap of the OLE object.
hbitmap = CreateCompatibleBitmap
(hdcObj, rc.right - rc.left, rc.bottom - rc.top);
// Select new bitmap as the bitmap object for the memory device context.
hbitmapOld = SelectObject (hdcMem, hbitmap);
// Paint directly into the memory dc using the new bitmap object.
DrawObj (hdcMem, lpobj, rc, dctypeBitmap);
// Restore old bitmap object.
hbitmap = SelectObject (hdcMem, hbitmapOld);
DeleteDC (hdcMem);
ReleaseDC (lpobj->hwnd, hdcObj);
// convert width and height to HIMETRIC units
rc.right = rc.right - rc.left;
rc.bottom = rc.bottom - rc.top;
DeviceToHiMetric ( (LPPOINT) &rc.right );
// Set the 1/10 of HIMETRIC units for the bitmap
SetBitmapDimensionEx (hbitmap, (DWORD) (rc.right/10), (DWORD) (rc.bottom/10), NULL);
// if (OpenClipboard (hwndMain))
// {
// // EmptyClipboard ();
// SetClipboardData(CF_BITMAP, hbitmap);
// CloseClipboard();
// }
return hbitmap;
}
/* GetLink
* -------
*
* Return a handle to an object's object or owner link data.
* Link information is in the form of three zero-separated strings,
* terminated with two zero bytes: CLASSNAME\0DOCNAME\0OBJNAME\0\0
*
* LPOBJ lpobj - The object
*
* RETURNS: A handle to the object's link data
*
* CUSTOMIZATION: Re-implement
*
*/
static HANDLE GetLink (LPOBJ lpobj)
{
CHAR sz[cchFilenameMax];
LPSTR lpszLink = NULL;
HANDLE hLink = NULL;
INT cchLen;
INT i;
// First make the class name.
lstrcpy (sz, szClassName);
cchLen = lstrlen (sz) + 1;
// Then the document name.
cchLen += GlobalGetAtomName
(docMain.aName, (LPSTR)sz + cchLen,
cchFilenameMax - cchLen) + 1;
// Then the object name.
lstrcpy (sz + cchLen, lpobj->native.szName);
cchLen += lstrlen (lpobj->native.szName) + 1;
// Add a second null to the end.
sz[cchLen++] = 0;
hLink = GlobalAlloc (GMEM_DDESHARE | GMEM_ZEROINIT, cchLen);
if (hLink == NULL)
return NULL;
if ((lpszLink = GlobalLock (hLink)) == NULL)
{
GlobalFree (hLink);
return NULL;
}
for (i=0; i < cchLen; i++)
lpszLink[i] = sz[i];
GlobalUnlock (hLink);
return hLink;
}
/* GetMetafilePict
* ---------------
*
* Return a handle to an object's picture data in metafile format.
*
* LPOBJ lpobj - The object
*
* RETURNS: A handle to the object's data in metafile format.
*
* CUSTOMIZATION: Re-implement
*
*/
static HANDLE GetMetafilePict (LPOBJ lpobj)
{
LPMETAFILEPICT lppict = NULL;
HANDLE hpict = NULL;
HANDLE hMF = NULL;
RECT rc;
HDC hdc;
hdc = CreateMetaFile(NULL);
GetClientRect (lpobj->hwnd, (LPRECT)&rc);
// Paint directly into the metafile.
DrawObj (hdc, lpobj, rc, dctypeMetafile);
// Get handle to the metafile.
if ((hMF = CloseMetaFile (hdc)) == NULL)
return NULL;
if(!(hpict = GlobalAlloc (GMEM_DDESHARE, sizeof (METAFILEPICT))))
{
DeleteMetaFile (hMF);
return NULL;
}
if ((lppict = (LPMETAFILEPICT)GlobalLock (hpict)) == NULL)
{
DeleteMetaFile (hMF);
GlobalFree (hpict);
return NULL;
}
rc.right = rc.right - rc.left;
rc.bottom = rc.bottom - rc.top;
DeviceToHiMetric ( (LPPOINT) &rc.right);
lppict->mm = MM_ANISOTROPIC;
lppict->hMF = hMF;
lppict->xExt = rc.right;
lppict->yExt = rc.bottom;
GlobalUnlock (hpict);
return hpict;
}
/* GetEnhMetafile
* ---------------
*
* Return a handle to an object's picture data in metafile format.
*
* LPOBJ lpobj - The object
*
* RETURNS: A handle to the object's data in metafile format.
*
* CUSTOMIZATION: Re-implement
*
*/
static HANDLE GetEnhMetafile (LPOBJ lpobj)
{
LPMETAFILEPICT lppict = NULL;
HANDLE hemf = NULL;
HANDLE hMF = NULL;
RECT rc;
HDC hdc, hdc2;
GetClientRect (lpobj->hwnd, (LPRECT)&rc);
rc.right -= rc.left;
rc.bottom -= rc.top;
rc.left = rc.top = 0;
DeviceToHiMetric ( (LPPOINT) &rc.right );
hdc = CreateEnhMetaFile ( NULL, NULL, &rc, NULL );
//* this is necessary because
//* we need to draw the object
//* in device coordinates that are
//* the same physical size as the HIMETRIC
//* logical space used in CreateEnhMetaFile.
//* In this case we have scaled the HIMETRIC
//* units down in order to use the logical
//* pixel ratio (which is recommended UI)
//* so we therefore have to convert the
//* scaled HIMETRIC units back to Device.
hdc2 = GetDC(NULL);
SetMapMode(hdc2, MM_HIMETRIC);
LPtoDP (hdc2, (LPPOINT)&rc.right, 1);
if (rc.bottom < 0) rc.bottom *= -1;
ReleaseDC(NULL,hdc2);
DrawObj (hdc, lpobj, rc, dctypeMetafile);
if ((hemf = (HANDLE)CloseEnhMetaFile (hdc)) == NULL)
return NULL;
return hemf;
}
/* GetNative
* ---------
*
* Return a handle to an object's native data.
*
* LPOBJ lpobj - The object whose native data is to be retrieved.
*
* RETURNS: a handle to the object's native data.
*
* CUSTOMIZATION: The line "*lpnative = lpobj->native;" will change to
* whatever code is necessary to copy an object's native data.
*
*/
static HANDLE GetNative (LPOBJ lpobj)
{
LPNATIVE lpnative = NULL;
HANDLE hNative = NULL;
hNative = GlobalAlloc (GMEM_DDESHARE | GMEM_ZEROINIT, sizeof (NATIVE));
if (hNative == NULL)
return NULL;
if ((lpnative = (LPNATIVE) GlobalLock (hNative)) == NULL)
{
GlobalFree (hNative);
return NULL;
}
// Copy the native data.
*lpnative = lpobj->native;
GlobalUnlock (hNative);
return hNative;
}
/* GetObjNum
* ---------
*
* LPSTR lpobj - The object whose number is desired
*
* RETURNS: The number of the object, i.e., the numerical portion of its name.
*
* CUSTOMIZATION: Server Demo specific
*/
static INT GetObjNum (LPOBJ lpobj)
{
LPSTR lpsz;
INT n=0;
lpsz = lpobj->native.szName + 7;
while (*lpsz && *lpsz>='0' && *lpsz<='9')
n = 10*n + *lpsz++ - '0';
return n;
}
/* GetText
* -------
*
* Return a handle to an object's data in text form.
* This function simply returns the name of the object.
*
* LPOBJ lpobj - The object
*
* RETURNS: A handle to the object's text.
*
* CUSTOMIZATION: Re-implement, if your application supports CF_TEXT as a
* presentation format.
*
*/
static HANDLE GetText (LPOBJ lpobj)
{
HANDLE hText = NULL;
LPSTR lpszText = NULL;
if(!(hText = GlobalAlloc (GMEM_DDESHARE, sizeof (lpobj->native.szName))))
return NULL;
if (!(lpszText = GlobalLock (hText)))
return NULL;
lstrcpy (lpszText, lpobj->native.szName);
GlobalUnlock (hText);
return hText;
}
/* ObjDoVerb OBJECT "DoVerb" METHOD
* ---------
*
* This method is called by the client, through the library, to either
* PLAY, or EDIT the object. PLAY is implemented as a beep, and
* EDIT will bring up the server and show the object for editing.
*
* LPOLEOBJECT lpoleobject - The OLE object
* WORD wVerb - The verb acting on the object: PLAY or EDIT
* BOOL fShow - Should the object be shown?
* BOOL fTakeFocus - Should the object window get the focus?
*
* RETURNS: OLE_OK
*
* CUSTOMIZATION: Add any more verbs your application supports.
* Implement verbPlay if your application supports it.
*
*/
OLESTATUS APIENTRY ObjDoVerb
(LPOLEOBJECT lpoleobject, UINT wVerb, BOOL fShow, BOOL fTakeFocus)
{
switch (wVerb)
{
case verbPlay:
{ // The application can do whatever is appropriate for the object.
INT i;
for (i=0; i<25;i++) MessageBeep (0);
return OLE_OK;
}
case verbEdit:
if (fShow)
return objvtbl.Show (lpoleobject, fTakeFocus);
else
return OLE_OK;
default:
// Unknown verb.
return OLE_ERROR_DOVERB;
}
}
/* ObjEnumFormats OBJECT "EnumFormats" METHOD
* ---------------
*
* This method is used to enumerate all supported clipboard formats.
* Terminate by returning NULL.
*
* LPOLEOBJECT lpoleobject - The OLE object
* OLECLIPFORMAT cfFormat - The 'current' clipboard format
*
* RETURNS: The 'next' clipboard format which is supported.
*
* CUSTOMIZATION: Verify that the list of formats this function
* returns matches the list of formats your application
* supports.
*
*/
OLECLIPFORMAT APIENTRY ObjEnumFormats
(LPOLEOBJECT lpoleobject, OLECLIPFORMAT cfFormat)
{
if (cfFormat == 0)
return cfNative;
if (cfFormat == cfNative)
return cfOwnerLink;
if (cfFormat == cfOwnerLink)
return CF_ENHMETAFILE;
if (cfFormat == CF_ENHMETAFILE)
return CF_METAFILEPICT;
if (cfFormat == CF_METAFILEPICT)
return CF_BITMAP;
if (cfFormat == CF_BITMAP)
return cfObjectLink;
if (cfFormat == cfObjectLink)
return 0;
return 0;
}
/* ObjGetData OBJECT "GetData" METHOD
* -----------
*
* Return the data requested for the specified object in the specified format.
*
* LPOLEOBJECT lpoleobject - The OLE object
* WORD cfFormat - The data type requested in standard
* clipboard format
* LPHANDLE lphandle - Pointer to handle to memory where data
* will be stored
*
* RETURNS: OLE_OK if successful
* OLE_ERROR_MEMORY if there was an error getting the data.
* OLE_ERROR_FORMAT if the requested format is unknown.
*
*
* CUSTOMIZATION: Add any additional formats your application supports, and
* remove any formats it does not support.
*
*/
OLESTATUS APIENTRY ObjGetData
(LPOLEOBJECT lpoleobject, OLECLIPFORMAT cfFormat, LPHANDLE lphandle)
{
LPOBJ lpobj;
lpobj = (LPOBJ) lpoleobject;
if (cfFormat == cfNative)
{
if (!(*lphandle = GetNative (lpobj)))
return OLE_ERROR_MEMORY;
// The client has requested the data in native format, therefore
// the data in the client and server are in sync.
fDocChanged = FALSE;
return OLE_OK;
}
if (cfFormat == CF_ENHMETAFILE)
{
if (!(*lphandle = GetEnhMetafile (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
if (cfFormat == CF_METAFILEPICT)
{
if (!(*lphandle = GetMetafilePict (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
if (cfFormat == CF_BITMAP)
{
if (!(*lphandle = (HANDLE)GetBitmap (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
if (cfFormat == CF_TEXT)
{
if (!(*lphandle = GetText (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
if (cfFormat == cfObjectLink)
{
if (!(*lphandle = GetLink (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
if (cfFormat == cfOwnerLink)
{
if (!(*lphandle = GetLink (lpobj)))
return OLE_ERROR_MEMORY;
return OLE_OK;
}
return OLE_ERROR_FORMAT;
}
/* ObjQueryProtocol OBJECT "QueryProtocol" METHOD
* ----------------
*
* LPOLEOBJECT lpoleobject - The OLE object
* OLE_LPCSTR lpszProtocol - The protocol name, either "StdFileEditing"
* or "StdExecute"
*
* RETURNS: If lpszProtocol is supported, return a pointer to an OLEOBJECT
* structure with an appropriate method table for that protocol.
* Otherwise, return NULL.
*
* CUSTOMIZATION: Allow any additional protocols your application supports.
*
*
*/
LPVOID APIENTRY ObjQueryProtocol
(LPOLEOBJECT lpoleobject, OLE_LPCSTR lpszProtocol)
{
return lstrcmp (lpszProtocol, "StdFileEditing") ? NULL : lpoleobject ;
}
/* ObjRelease OBJECT "Release" METHOD
* -----------
*
* The server application should not destroy data when the library calls the
* ReleaseObj method.
* The library calls the ReleaseObj method when no clients are connected
* to the object.
*
* LPOLEOBJECT lpoleobject - The OLE object
*
* RETURNS: OLE_OK
*
* CUSTOMIZATION: Re-implement. Do whatever needs to be done, if anything,
* when no clients are connected to an object.
*
*/
OLESTATUS APIENTRY ObjRelease (LPOLEOBJECT lpoleobject)
{
INT i;
/* No client is connected to the object so break all assocaiations
between clients and the object. */
for (i=0; i < clpoleclient; i++)
((LPOBJ)lpoleobject)->lpoleclient[i] = NULL;
return OLE_OK;
}
/* ObjSetBounds OBJECT "SetBounds" METHOD
* ------------
*
* This method is called to set new bounds for an object.
* The bounds are in HIMETRIC units.
* A call to this method is ignored for linked objects because the size of
* a linked object depends only on the source file.
*
* LPOLEOBJECT lpoleobject - The OLE object
* OLE_CONST RECT FAR* lprect - The new bounds
*
* RETURNS: OLE_OK
*
* CUSTOMIZATION: Re-implement
* How an object is sized is application-specific. (Server Demo
* uses MoveWindow.)
*
*/
OLESTATUS APIENTRY ObjSetBounds (LPOLEOBJECT lpoleobj, OLE_CONST RECT FAR * lprect)
{
if (docMain.doctype == doctypeEmbedded)
{
RECT rect = *lprect;
LPOBJ lpobj = (LPOBJ) lpoleobj;
// the units are in HIMETRIC
rect.right = rect.right - rect.left;
rect.bottom = rect.top - rect.bottom;
HiMetricToDevice ( (LPPOINT) &rect.right);
MoveWindow (lpobj->hwnd, lpobj->native.nX, lpobj->native.nY,
rect.right + 2 * GetSystemMetrics(SM_CXFRAME),
rect.bottom + 2 * GetSystemMetrics(SM_CYFRAME),
TRUE);
}
return OLE_OK;
}
/* ObjSetColorScheme OBJECT "SetColorScheme" METHOD
* -----------------
*
* The client calls this method to suggest a color scheme (palette) for
* the server to use for the object.
*
* LPOLEOBJECT lpoleobject - The OLE object
* OLE_CONST LOGPALETTE FAR * lppal - Suggested palette
*
* RETURNS: OLE_ERROR_PALETTE if CreatePalette fails,
* OLE_OK otherwise
*
*
* CUSTOMIZATION: If your application supports color schemes, then this
* function is a good example of how to create and store
* a palette.
*
*/
OLESTATUS APIENTRY ObjSetColorScheme
(LPOLEOBJECT lpoleobject, OLE_CONST LOGPALETTE FAR *lppal)
{
HPALETTE hpal = CreatePalette (lppal);
LPOBJ lpobj = (LPOBJ) lpoleobject;
if (hpal==NULL)
return OLE_ERROR_PALETTE;
if (lpobj->hpal)
DeleteObject (lpobj->hpal);
lpobj->hpal = hpal;
return OLE_OK;
}
/* ObjSetData OBJECT "SetData" METHOD
* ----------
*
* This method is used to store data into the object in the specified
* format. This will be called with Native format after an embedded
* object has been opened by the Edit method.
*
* LPOLEOBJECT lpoleobject - The OLE object
* WORD cfFormat - Data type, i.e., clipboard format
* HANDLE hdata - Handle to the data.
*
* RETURNS: OLE_OK if the data was stored properly
* OLE_ERROR_FORMAT if format was not cfNative.
* OLE_ERROR_MEMORY if memory could not be locked.
*
* CUSTOMIZATION: The large then-clause will need to be re-implemented for
* your application. You may wish to support additional
* formats besides cfNative.
*
*/
OLESTATUS APIENTRY ObjSetData
(LPOLEOBJECT lpoleobject, OLECLIPFORMAT cfFormat, HANDLE hdata)
{
LPNATIVE lpnative;
LPOBJ lpobj;
lpobj = (LPOBJ)lpoleobject;
if (cfFormat != cfNative)
{
return OLE_ERROR_FORMAT;
}
lpnative = (LPNATIVE) GlobalLock (hdata);
if (lpnative)
{
lpobj->native = *lpnative;
if (lpobj->aName)
GlobalDeleteAtom (lpobj->aName);
lpobj->aName = GlobalAddAtom (lpnative->szName);
// CreateNewObj made an "Object 1" but we may be changing its number.
docMain.rgfObjNums[1] = FALSE;
docMain.rgfObjNums [GetObjNum(lpobj)] = TRUE;
MoveWindow (lpobj->hwnd, 0, 0,
// lpobj->native.nWidth + 2 * GetSystemMetrics(SM_CXFRAME),
// lpobj->native.nHeight+ 2 * GetSystemMetrics(SM_CYFRAME),
lpobj->native.nWidth,
lpobj->native.nHeight,
FALSE);
GlobalUnlock (hdata);
}
// Server is responsible for deleting the data.
GlobalFree(hdata);
return lpnative ? OLE_OK : OLE_ERROR_MEMORY;
}
/* ObjSetTargetDevice OBJECT "SetTargetDevice" METHOD
* -------------------
*
* This method is used to indicate the device type that an object
* will be rendered on. It is the server's responsibility to free hdata.
*
* LPOLEOBJECT lpoleobject - The OLE object
* HANDLE hdata - Handle to memory containing
* a StdTargetDevice structure
*
* RETURNS: OLE_OK
*
* CUSTOMIZATION: Implement. Server Demo currently does not do anything.
*
*/
OLESTATUS APIENTRY ObjSetTargetDevice (LPOLEOBJECT lpoleobject, HANDLE hdata)
{
if (hdata == NULL)
{
// Rendering for the screen is requested.
}
else
{
LPSTR lpstd = (LPSTR) GlobalLock (hdata);
// lpstd points to a StdTargetDevice structure.
// Use it to do whatever is appropriate to generate the best results
// on the specified target device.
GlobalUnlock (hdata);
// Server is responsible for freeing the data.
GlobalFree (hdata);
}
return OLE_OK;
}
/* ObjShow OBJECT "Show" METHOD
* --------
*
* This method is used to display the object.
* The server application should be activated and brought to the top.
* Also, in a REAL server application, the object should be scrolled
* into view. The object should be selected.
*
* LPOLEOBJECT lpoleobject - Pointer to the OLE object
* BOOL fTakeFocus - Should server window get the focus?
*
* RETURNS: OLE_OK
*
*
* CUSTOMIZATION: In your application, the document should be scrolled
* to bring the object into view. Server Demo brings the
* object to the front, in case it is a linked object inside a
* document with other objects obscuring it.
*
*/
OLESTATUS APIENTRY ObjShow (LPOLEOBJECT lpoleobject, BOOL fTakeFocus)
{
LPOBJ lpobj;
HWND hwndOldFocus;
hwndOldFocus = GetFocus();
lpobj = (LPOBJ) lpoleobject;
if (fTakeFocus)
SetForegroundWindow (lpobj->hwnd);
ShowWindow(hwndMain, SW_SHOWNORMAL);
SetFocus (fTakeFocus ? lpobj->hwnd : hwndOldFocus);
return OLE_OK;
}
/* PaintObj
* ---------
*
* This function is called by the WM_PAINT message to paint an object
* on the screen.
*
* HWND hwnd - The object window in which to paint the object
*
* CUSTOMIZATION: Server Demo specific
*
*/
VOID PaintObj (HWND hwnd)
{
LPOBJ lpobj;
RECT rc;
HDC hdc;
PAINTSTRUCT paintstruct;
BeginPaint (hwnd, &paintstruct);
hdc = GetDC (hwnd);
lpobj = HwndToLpobj (hwnd);
GetClientRect (hwnd, (LPRECT) &rc);
DrawObj (hdc, lpobj, rc, dctypeScreen);
ReleaseDC (hwnd, hdc);
EndPaint (hwnd, &paintstruct);
}
/* RevokeObj
* ---------
*
* Call OleRevokeObject because the user has destroyed the object.
*
* LPOBJ lpobj - The object which has been destroyed
*
*
* CUSTOMIZATION: You will only need to call OleRevokeObject once if there
* is only one LPOLECLIENT in your OBJ structure, which there
* should be.
*
*/
VOID RevokeObj (LPOBJ lpobj)
{
INT i;
for (i=0; i< clpoleclient; i++)
{
if (lpobj->lpoleclient[i])
OleRevokeObject (lpobj->lpoleclient[i]);
else
/* if lpobj->lpoleclient[i]==NULL then there are no more non-NULLs
in the array. */
break;
}
}
/* SendObjMsg
* ----------
*
* This function sends a message to a specific object.
*
* LPOBJ lpobj - The object
* WORD wMessage - The message to send
*
* CUSTOMIZATION: You will only need to call CallBack once if there
* is only one LPOLECLIENT in your OBJ structure, which there
* should be.
*
*/
VOID SendObjMsg (LPOBJ lpobj, WORD wMessage)
{
INT i;
for (i=0; i < clpoleclient; i++)
{
if (lpobj->lpoleclient[i])
{
// Call the object's Callback function.
lpobj->lpoleclient[i]->lpvtbl->CallBack
(lpobj->lpoleclient[i], wMessage, (LPOLEOBJECT) lpobj);
}
else
break;
}
}
/* SizeObj
* -------
*
* Change the size of an object.
*
* HWND hwnd - The object's window
* RECT rect - The requested new size in device units
* BOOL fMove - Should the object be moved? (or just resized?)
*
* CUSTOMIZATION: Server Demo specific
*
*/
VOID SizeObj (HWND hwnd, RECT rect, BOOL fMove)
{
LPOBJ lpobj;
lpobj = HwndToLpobj (hwnd);
if (fMove)
{
lpobj->native.nX = rect.left;
lpobj->native.nY = rect.top;
}
lpobj->native.nWidth = rect.right - rect.left;
lpobj->native.nHeight = rect.bottom - rect.top ;
SetHiMetricFields (lpobj);
InvalidateRect (hwnd, (LPRECT)NULL, TRUE);
fDocChanged = TRUE;
if (docMain.doctype == doctypeFromFile)
{
// If object is linked, update it in client now.
SendObjMsg (lpobj, OLE_CHANGED);
}
}
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