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gtk2/gdk/win32/gdkdnd-win32.c
Tor Lillqvist 0f5c8e857c New function. Guesstimate what Unicode subranges a font covers based on 
1999-12-06  Tor Lillqvist  <tml@iki.fi>

* gdk/win32/gdkfont-win32.c (check_unicode_subranges): New
function. Guesstimate what Unicode subranges a font covers based
on the codepages. Windows tells us it covers. This will hopefully
help those Windows versions or fonts that don't give us any useful
Unicode subrange information with GetTextCharsetInfo. Call this
function in gdk_font_load_internal.

* gdk/win32/{gdkdnd,gdkimage,gdkpixmap,gdkprivate}-win32.c: Misc
minor changes.
1999-12-05 23:26:46 +00:00

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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1999 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 1998-1999 Tor Lillqvist
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include <string.h>
/* #define OLE2_DND */
#define INITGUID
#include "gdkdnd.h"
#include "gdkproperty.h"
#include "gdkprivate.h"
#include "gdkwin32.h"
#ifdef OLE2_DND
#include <ole2.h>
#else
#include <objbase.h>
#endif
#ifdef _MSC_VER
#include <shlobj.h>
#include <shlguid.h>
#endif
#ifndef _MSC_VER
static IID IID_IUnknown = {
0x00000000, 0x0000, 0x0000, { 0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46 } };
static IID IID_IDropSource = {
0x00000121, 0x0000, 0x0000, { 0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46 } };
static IID IID_IDropTarget = {
0x00000122, 0x0000, 0x0000, { 0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46 } };
#endif
#include <gdk/gdk.h>
typedef struct _GdkDragContextPrivate GdkDragContextPrivate;
typedef enum {
GDK_DRAG_STATUS_DRAG,
GDK_DRAG_STATUS_MOTION_WAIT,
GDK_DRAG_STATUS_ACTION_WAIT,
GDK_DRAG_STATUS_DROP
} GtkDragStatus;
typedef enum {
GDK_DRAG_SOURCE,
GDK_DRAG_TARGET
} GdkDragKind;
#ifdef OLE2_DND
#define PRINT_GUID(guid) \
g_print ("guid = %.08x-%.04x-%.04x-%.02x%.02x-%.02x%.02x%.02x%.02x%.02x%.02x", \
((gulong *) guid)[0], \
((gushort *) guid)[2], \
((gushort *) guid)[3], \
((guchar *) guid)[8], \
((guchar *) guid)[9], \
((guchar *) guid)[10], \
((guchar *) guid)[11], \
((guchar *) guid)[12], \
((guchar *) guid)[13], \
((guchar *) guid)[14], \
((guchar *) guid)[15]);
#endif /* OLE2_DND */
/* Structure that holds information about a drag in progress.
* this is used on both source and destination sides.
*/
struct _GdkDragContextPrivate {
GdkDragContext context;
guint ref_count;
guint16 last_x; /* Coordinates from last event */
guint16 last_y;
HWND dest_xid;
guint drag_status; /* Current status of drag */
};
GdkDragContext *current_dest_drag = NULL;
/* Drag Contexts */
static GList *contexts;
GdkDragContext *
gdk_drag_context_new (void)
{
GdkDragContextPrivate *result;
result = g_new0 (GdkDragContextPrivate, 1);
result->ref_count = 1;
contexts = g_list_prepend (contexts, result);
return (GdkDragContext *)result;
}
void
gdk_drag_context_ref (GdkDragContext *context)
{
g_return_if_fail (context != NULL);
((GdkDragContextPrivate *)context)->ref_count++;
}
void
gdk_drag_context_unref (GdkDragContext *context)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
g_return_if_fail (context != NULL);
private->ref_count--;
GDK_NOTE (DND, g_print ("gdk_drag_context_unref: %d%s\n",
private->ref_count,
(private->ref_count == 0 ? " freeing" : "")));
if (private->ref_count == 0)
{
g_dataset_destroy (private);
g_list_free (context->targets);
if (context->source_window)
gdk_window_unref (context->source_window);
if (context->dest_window)
gdk_window_unref (context->dest_window);
contexts = g_list_remove (contexts, private);
g_free (private);
}
}
#if 0
static GdkDragContext *
gdk_drag_context_find (gboolean is_source,
HWND source_xid,
HWND dest_xid)
{
GList *tmp_list = contexts;
GdkDragContext *context;
while (tmp_list)
{
context = (GdkDragContext *)tmp_list->data;
if ((!context->is_source == !is_source) &&
((source_xid == None) || (context->source_window &&
(GDK_WINDOW_XWINDOW (context->source_window) == source_xid))) &&
((dest_xid == None) || (context->dest_window &&
(GDK_WINDOW_XWINDOW (context->dest_window) == dest_xid))))
return context;
tmp_list = tmp_list->next;
}
return NULL;
}
#endif
typedef struct {
#ifdef OLE2_DND
IDropTarget idt;
#endif
GdkDragContext *context;
} target_drag_context;
typedef struct {
#ifdef OLE2_DND
IDropSource ids;
#endif
GdkDragContext *context;
} source_drag_context;
#ifdef OLE2_DND
static ULONG STDMETHODCALLTYPE
m_add_ref_target (IDropTarget __RPC_FAR *This)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context;
GDK_NOTE (DND, g_print ("m_add_ref_target\n"));
gdk_drag_context_ref (ctx->context);
return private->ref_count;
}
static HRESULT STDMETHODCALLTYPE
m_query_interface_target (IDropTarget __RPC_FAR *This,
REFIID riid,
void __RPC_FAR *__RPC_FAR *ppvObject)
{
GDK_NOTE (DND, g_print ("m_query_interface_target\n"));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
m_add_ref_target (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropTarget))
{
g_print ("...IDropTarget\n");
m_add_ref_target (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\n");
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
m_release_target (IDropTarget __RPC_FAR *This)
{
target_drag_context *ctx = (target_drag_context *) This;
GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context;
GDK_NOTE (DND, g_print ("m_release_target\n"));
gdk_drag_context_unref (ctx->context);
if (private->ref_count == 1)
{
gdk_drag_context_unref (ctx->context);
return 0;
}
else
return private->ref_count - 1;
}
static HRESULT STDMETHODCALLTYPE
m_drag_enter (IDropTarget __RPC_FAR *This,
IDataObject __RPC_FAR *pDataObj,
DWORD grfKeyState,
POINTL pt,
DWORD __RPC_FAR *pdwEffect)
{
GDK_NOTE (DND, g_print ("m_drag_enter\n"));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_drag_over (IDropTarget __RPC_FAR *This,
DWORD grfKeyState,
POINTL pt,
DWORD __RPC_FAR *pdwEffect)
{
GDK_NOTE (DND, g_print ("m_drag_over\n"));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_drag_leave (IDropTarget __RPC_FAR *This)
{
GDK_NOTE (DND, g_print ("m_drag_leave\n"));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_drop (IDropTarget __RPC_FAR *This,
IDataObject __RPC_FAR *pDataObj,
DWORD grfKeyState,
POINTL pt,
DWORD __RPC_FAR *pdwEffect)
{
GDK_NOTE (DND, g_print ("m_drop\n"));
return E_UNEXPECTED;
}
static ULONG STDMETHODCALLTYPE
m_add_ref_source (IDropSource __RPC_FAR *This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context;
GDK_NOTE (DND, g_print ("m_add_ref_source\n"));
gdk_drag_context_ref (ctx->context);
return private->ref_count;
}
static HRESULT STDMETHODCALLTYPE
m_query_interface_source (IDropSource __RPC_FAR *This,
REFIID riid,
void __RPC_FAR *__RPC_FAR *ppvObject)
{
GDK_NOTE (DND, g_print ("m_query_interface_source\n"));
*ppvObject = NULL;
PRINT_GUID (riid);
if (IsEqualGUID (riid, &IID_IUnknown))
{
g_print ("...IUnknown\n");
m_add_ref_source (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDropSource))
{
g_print ("...IDropSource\n");
m_add_ref_source (This);
*ppvObject = This;
return S_OK;
}
else
{
g_print ("...Huh?\n");
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
m_release_source (IDropSource __RPC_FAR *This)
{
source_drag_context *ctx = (source_drag_context *) This;
GdkDragContextPrivate *private = (GdkDragContextPrivate *) ctx->context;
GDK_NOTE (DND, g_print ("m_release_source\n"));
gdk_drag_context_unref (ctx->context);
if (private->ref_count == 1)
{
gdk_drag_context_unref (ctx->context);
return 0;
}
else
return private->ref_count - 1;
}
static HRESULT STDMETHODCALLTYPE
m_query_continue_drag (IDropSource __RPC_FAR *This,
BOOL fEscapePressed,
DWORD grfKeyState)
{
GDK_NOTE (DND, g_print ("m_query_continue_drag\n"));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_give_feedback (IDropSource __RPC_FAR *This,
DWORD dwEffect)
{
GDK_NOTE (DND, g_print ("m_give_feedback\n"));
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_query_interface_object (IDataObject __RPC_FAR *This,
REFIID riid,
void __RPC_FAR *__RPC_FAR *ppvObject)
{
return E_UNEXPECTED;
}
static ULONG STDMETHODCALLTYPE
m_add_ref_object (IDataObject __RPC_FAR *This)
{
return E_UNEXPECTED;
}
static ULONG STDMETHODCALLTYPE
m_release_object (IDataObject __RPC_FAR *This)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_get_data (IDataObject __RPC_FAR *This,
FORMATETC *pFormatEtc,
STGMEDIUM *pMedium)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_get_data_here (IDataObject __RPC_FAR *This,
FORMATETC *pFormatEtc,
STGMEDIUM *pMedium)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_query_get_data (IDataObject __RPC_FAR *This,
FORMATETC *pFormatEtc)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_get_canonical_format_etc (IDataObject __RPC_FAR *This,
FORMATETC *pFormatEtcIn,
FORMATETC *pFormatEtcOut)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_set_data (IDataObject __RPC_FAR *This,
FORMATETC *pFormatEtc,
STGMEDIUM *pMedium,
BOOL fRelease)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_enum_format_etc (IDataObject __RPC_FAR *This,
DWORD dwDirection,
IEnumFORMATETC **ppEnumFormatEtc)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_d_advise (IDataObject __RPC_FAR *This,
FORMATETC *pFormatetc,
DWORD advf,
IAdviseSink *pAdvSink,
DWORD *pdwConnection)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_d_unadvise (IDataObject __RPC_FAR *This,
DWORD dwConnection)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
m_enum_d_advise (IDataObject __RPC_FAR *This,
IEnumSTATDATA **ppenumAdvise)
{
return E_UNEXPECTED;
}
static IDropTargetVtbl idt_vtbl = {
m_query_interface_target,
m_add_ref_target,
m_release_target,
m_drag_enter,
m_drag_over,
m_drag_leave,
m_drop
};
static IDropSourceVtbl ids_vtbl = {
m_query_interface_source,
m_add_ref_source,
m_release_source,
m_query_continue_drag,
m_give_feedback
};
static IDataObjectVtbl ido_vtbl = {
m_query_interface_object,
m_add_ref_object,
m_release_object,
m_get_data,
m_get_data_here,
m_query_get_data,
m_get_canonical_format_etc,
m_set_data,
m_enum_format_etc,
m_d_advise,
m_d_unadvise,
m_enum_d_advise
};
#endif /* OLE2_DND */
static target_drag_context *
target_context_new (void)
{
target_drag_context *result;
result = g_new0 (target_drag_context, 1);
#ifdef OLE2_DND
result->idt.lpVtbl = &idt_vtbl;
#endif
result->context = gdk_drag_context_new ();
return result;
}
static source_drag_context *
source_context_new (void)
{
source_drag_context *result;
result = g_new0 (source_drag_context, 1);
#ifdef OLE2_DND
result->ids.lpVtbl = &ids_vtbl;
#endif
result->context = gdk_drag_context_new ();
return result;
}
#ifdef _MSC_VER
/* From MS Knowledge Base article Q130698 */
/* resolve_link() fills the filename and path buffer
* with relevant information
* hWnd - calling app's window handle.
*
* lpszLinkName - name of the link file passed into the function.
*
* lpszPath - the buffer that will receive the file pathname.
*/
static HRESULT
resolve_link(HWND hWnd,
LPCTSTR lpszLinkName,
LPSTR lpszPath,
LPSTR lpszDescription)
{
HRESULT hres;
IShellLink *psl;
WIN32_FIND_DATA wfd;
/* Assume Failure to start with: */
*lpszPath = 0;
if (lpszDescription)
*lpszDescription = 0;
/* Call CoCreateInstance to obtain the IShellLink interface
* pointer. This call fails if CoInitialize is not called, so it is
* assumed that CoInitialize has been called.
*/
hres = CoCreateInstance (&CLSID_ShellLink,
NULL,
CLSCTX_INPROC_SERVER,
&IID_IShellLink,
(LPVOID *)&psl);
if (SUCCEEDED (hres))
{
IPersistFile *ppf;
/* The IShellLink interface supports the IPersistFile
* interface. Get an interface pointer to it.
*/
hres = psl->lpVtbl->QueryInterface (psl,
&IID_IPersistFile,
(LPVOID *) &ppf);
if (SUCCEEDED (hres))
{
WORD wsz[MAX_PATH];
/* Convert the given link name string to wide character string. */
MultiByteToWideChar (CP_ACP, 0,
lpszLinkName,
-1, wsz, MAX_PATH);
/* Load the file. */
hres = ppf->lpVtbl->Load (ppf, wsz, STGM_READ);
if (SUCCEEDED (hres))
{
/* Resolve the link by calling the Resolve()
* interface function.
*/
hres = psl->lpVtbl->Resolve(psl, hWnd,
SLR_ANY_MATCH |
SLR_NO_UI);
if (SUCCEEDED (hres))
{
hres = psl->lpVtbl->GetPath (psl, lpszPath,
MAX_PATH,
(WIN32_FIND_DATA*)&wfd,
0);
if (SUCCEEDED (hres) && lpszDescription != NULL)
{
hres = psl->lpVtbl->GetDescription (psl,
lpszDescription,
MAX_PATH );
if (!SUCCEEDED (hres))
return FALSE;
}
}
}
ppf->lpVtbl->Release (ppf);
}
psl->lpVtbl->Release (psl);
}
return SUCCEEDED (hres);
}
#else
#define resolve_link(hWnd, lpszLinkName, lpszPath, lpszDescription) FALSE
#endif
static GdkFilterReturn
gdk_dropfiles_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
GdkDragContext *context;
GdkDragContextPrivate *private;
static GdkAtom text_uri_list_atom = GDK_NONE;
GString *result;
MSG *msg = (MSG *) xev;
HANDLE hdrop;
POINT pt;
gint nfiles, i, k;
guchar fileName[MAX_PATH], linkedFile[MAX_PATH];
if (text_uri_list_atom == GDK_NONE)
text_uri_list_atom = gdk_atom_intern ("text/uri-list", FALSE);
if (msg->message == WM_DROPFILES)
{
GDK_NOTE (DND, g_print ("WM_DROPFILES: %#x\n", msg->hwnd));
context = gdk_drag_context_new ();
private = (GdkDragContextPrivate *) context;
context->protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
context->is_source = FALSE;
context->source_window = gdk_parent_root;
context->dest_window = event->any.window;
gdk_window_ref (context->dest_window);
/* WM_DROPFILES drops are always file names */
context->targets =
g_list_append (NULL, GUINT_TO_POINTER (text_uri_list_atom));
current_dest_drag = context;
event->dnd.type = GDK_DROP_START;
event->dnd.context = current_dest_drag;
gdk_drag_context_ref (current_dest_drag);
hdrop = (HANDLE) msg->wParam;
DragQueryPoint (hdrop, &pt);
ClientToScreen (msg->hwnd, &pt);
event->dnd.x_root = pt.x;
event->dnd.y_root = pt.y;
event->dnd.time = msg->time;
nfiles = DragQueryFile (hdrop, 0xFFFFFFFF, NULL, 0);
result = g_string_new (NULL);
for (i = 0; i < nfiles; i++)
{
g_string_append (result, "file:");
DragQueryFile (hdrop, i, fileName, MAX_PATH);
/* Resolve shortcuts */
if (resolve_link (msg->hwnd, fileName, linkedFile, NULL))
{
g_string_append (result, linkedFile);
GDK_NOTE (DND, g_print ("...%s link to %s\n",
fileName, linkedFile));
}
else
{
g_string_append (result, fileName);
GDK_NOTE (DND, g_print ("...%s\n", fileName));
}
g_string_append (result, "\015\012");
}
gdk_sel_prop_store (gdk_parent_root, text_uri_list_atom, 8,
result->str, result->len + 1);
DragFinish (hdrop);
return GDK_FILTER_TRANSLATE;
}
else
return GDK_FILTER_CONTINUE;
}
/*************************************************************
************************** Public API ***********************
*************************************************************/
void
gdk_dnd_init (void)
{
HRESULT hres;
#ifdef OLE2_DND
hres = OleInitialize (NULL);
if (! SUCCEEDED (hres))
g_error ("OleInitialize failed");
#endif
}
void
gdk_win32_dnd_exit (void)
{
#ifdef OLE2_DND
OleUninitialize ();
#endif
}
/* Source side */
static void
gdk_drag_do_leave (GdkDragContext *context, guint32 time)
{
if (context->dest_window)
{
GDK_NOTE (DND, g_print ("gdk_drag_do_leave\n"));
gdk_window_unref (context->dest_window);
context->dest_window = NULL;
}
}
GdkDragContext *
gdk_drag_begin (GdkWindow *window,
GList *targets)
{
GList *tmp_list;
source_drag_context *ctx;
g_return_val_if_fail (window != NULL, NULL);
GDK_NOTE (DND, g_print ("gdk_drag_begin\n"));
ctx = source_context_new ();
ctx->context->is_source = TRUE;
ctx->context->source_window = window;
gdk_window_ref (window);
tmp_list = g_list_last (targets);
ctx->context->targets = NULL;
while (tmp_list)
{
ctx->context->targets = g_list_prepend (ctx->context->targets,
tmp_list->data);
tmp_list = tmp_list->prev;
}
ctx->context->actions = 0;
#if 0
DoDragDrop (...);
#endif
return ctx->context;
}
guint32
gdk_drag_get_protocol (guint32 xid,
GdkDragProtocol *protocol)
{
/* This isn't used */
return 0;
}
void
gdk_drag_find_window (GdkDragContext *context,
GdkWindow *drag_window,
gint x_root,
gint y_root,
GdkWindow **dest_window,
GdkDragProtocol *protocol)
{
GdkDragContextPrivate *private = (GdkDragContextPrivate *)context;
GdkDrawablePrivate *drag_window_private = (GdkDrawablePrivate*) drag_window;
HWND recipient;
POINT pt;
GDK_NOTE (DND, g_print ("gdk_drag_find_window: %#x +%d+%d\n",
(drag_window ? GDK_DRAWABLE_XID (drag_window) : 0),
x_root, y_root));
pt.x = x_root;
pt.y = y_root;
recipient = WindowFromPoint (pt);
if (recipient == NULL)
*dest_window = NULL;
else
{
*dest_window = gdk_window_lookup (recipient);
if (*dest_window)
gdk_window_ref (*dest_window);
*protocol = GDK_DRAG_PROTO_WIN32_DROPFILES;
}
}
gboolean
gdk_drag_motion (GdkDragContext *context,
GdkWindow *dest_window,
GdkDragProtocol protocol,
gint x_root,
gint y_root,
GdkDragAction suggested_action,
GdkDragAction possible_actions,
guint32 time)
{
return FALSE;
}
void
gdk_drag_drop (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
g_warning ("gdk_drag_drop: not implemented\n");
}
void
gdk_drag_abort (GdkDragContext *context,
guint32 time)
{
g_return_if_fail (context != NULL);
gdk_drag_do_leave (context, time);
}
/* Destination side */
void
gdk_drag_status (GdkDragContext *context,
GdkDragAction action,
guint32 time)
{
GDK_NOTE (DND, g_print ("gdk_drag_status\n"));
}
void
gdk_drop_reply (GdkDragContext *context,
gboolean ok,
guint32 time)
{
}
void
gdk_drop_finish (GdkDragContext *context,
gboolean success,
guint32 time)
{
}
static GdkFilterReturn
gdk_destroy_filter (GdkXEvent *xev,
GdkEvent *event,
gpointer data)
{
#ifdef OLE2_DND
MSG *msg = (MSG *) xev;
if (msg->message == WM_DESTROY)
{
IDropTarget *idtp = (IDropTarget *) data;
GDK_NOTE (DND, g_print ("gdk_destroy_filter: WM_DESTROY: %#x\n", msg->hwnd));
RevokeDragDrop (msg->hwnd);
CoLockObjectExternal (idtp, FALSE, TRUE);
}
#endif
return GDK_FILTER_CONTINUE;
}
void
gdk_window_register_dnd (GdkWindow *window)
{
#ifdef OLE2_DND
target_drag_context *context;
HRESULT hres;
#endif
g_return_if_fail (window != NULL);
GDK_NOTE (DND, g_print ("gdk_window_register_dnd: %#x\n",
GDK_DRAWABLE_XID (window)));
/* We always claim to accept dropped files, but in fact we might not,
* of course. This function is called in such a way that it cannot know
* whether the window (widget) in question actually accepts files
* (in gtk, data of type text/uri-list) or not.
*/
gdk_window_add_filter (window, gdk_dropfiles_filter, NULL);
DragAcceptFiles (GDK_DRAWABLE_XID (window), TRUE);
#ifdef OLE2_DND
/* Register for OLE2 d&d */
context = target_context_new ();
hres = CoLockObjectExternal ((IUnknown *) &context->idt, TRUE, FALSE);
if (!SUCCEEDED (hres))
g_warning ("gdk_window_register_dnd: CoLockObjectExternal failed");
else
{
hres = RegisterDragDrop (GDK_DRAWABLE_XID (window), &context->idt);
if (hres == DRAGDROP_E_ALREADYREGISTERED)
{
g_print ("DRAGDROP_E_ALREADYREGISTERED\n");
CoLockObjectExternal ((IUnknown *) &context->idt, FALSE, FALSE);
}
else if (!SUCCEEDED (hres))
g_warning ("gdk_window_register_dnd: RegisterDragDrop failed");
else
{
gdk_window_add_filter (window, gdk_destroy_filter, &context->idt);
}
}
#endif
}
/*************************************************************
* gdk_drag_get_selection:
* Returns the selection atom for the current source window
* arguments:
*
* results:
*************************************************************/
GdkAtom
gdk_drag_get_selection (GdkDragContext *context)
{
if (context->protocol == GDK_DRAG_PROTO_WIN32_DROPFILES)
return gdk_win32_dropfiles_atom;
else if (context->protocol == GDK_DRAG_PROTO_OLE2)
return gdk_ole2_dnd_atom;
else
return GDK_NONE;
}
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