gtk2/gdk/win32/gdkprivate-win32.h
Руслан Ижбулатов 6c29e81051 W32: Massive W32 DnD fix
Massive changes to OLE2 DnD protocol, which was completely broken before:
* Keep GdkDragContext and OLE2 objects separate (don't ref/unref them
  together, don't necessarily create them together).
* Keep IDataObject formats in the object itself, not in a global variable.
* Fix getdata() to look up the request target in its format list, not in the
  global hash table
* Create target GdkDragContext on each drag_enter, destroy it on drag_leave,
  whereas IDropTarget is created when a window becomes a drag destination
  and is re-used indefinitely.
* Query the source IDataObject for its supported types, cache them in the
  target (!) context. This is how GTK+ works, honestly.
* Remember current_src_object when we initiate a drag, to be able
  to detect later on that the data object is ours and use a
  shortcut when querying targets
* Make sure GDK_DRAG_MOTION is only sent when something changes
* Support GTK drag cursors
* Ensure that exotic GTK clipboard formats are registered
  (but try to avoid registering formats that can't be used between applications).
* Don't enumerate internal formats
* Ensure that DnD indicator window can't accept drags or receive any kind of input
  (use WS_EX_TRANSPARENT).
* Remove unneeded indentation in _gdk_win32_dnd_do_dragdrop()
* Fix indentation in gdk_win32_drag_context_drop_finish()
* Remove obsolete comments in _gdk_win32_window_register_dnd()
* Check for DnD in progress when processing WM_KILLFOCUS, don't emit a grab
  break event in such cases (this allows alt-tabbing while DnD is in progress,
  though there may be lingering issues with focus after dropping...)
* Support Shell ID List -> text/uri-list conversion, now it's possible
  to drop files (dragged from Explorer) on GTK+ applications
* Explicitly use RegisterClipboardFormatA() when we know that the string
  is not in unicode. Otherwise explicitly use RegisterClipboardFormatW()
  with a UTF8->UTF16 converted string
* Fix _gdk_win32_display_get_selection_owner() to correctly bail
  when selection owner HWND is NULL (looking up GdkWindow for NULL
  HWND always succeeds and returns the root window - not the intended
  effect)
* More logging
* Send DROP_FINISHED event after DnD loop ends
* Send STATUS event on feedback
* Move GetKeyboardState() and related code into _gdk_win32_window_drag_begin(),
  so that it's closer to the point where last_pt and start_pt are set
* Use & 0x80 to check for the key being pressed. Windows will set low-order bit
  to 1 for all mouse buttons to indicate that they are toggled, so simply
  checking for the value not being 0 is not enough anymore.
  This is probably a new thing in modern W32 that didn't exist before
  (OLE2 DnD code is old).
* Fixed (hopefully) and simplified HiDPI parts of the code.

Also adds managed DnD implementation for W32 GDK backend (for both
OLE2 and LOCAL protocols). Mostly a copy of the X11 backend code, but
there are some minor differences:
* doesn't use drag_window field in GdkDragContext,
  uses the one in GdkWin32DragContext exclusively
* subtracts hotspot offset from the window coordinates when showing
  the dragback animation
* tries to consistently support scaling and caches the scale
  in the context
* Some keynav code is removed (places where grabbing/ungrabbing should
  happen is marked with TODOs), and the rest is probably inert.

Also significantly changes the way selection (and clipboard) is handled
(as MSDN rightly notes, the handling for DnD and Clipboard
 formats is virtually the same, so it makes sense to handle
 both with the same code):
* Don't spam GDK_OWNER_CHANGE, send them only when owner
  actually changes
* Open clipboard when our process becomes the clipboard owner
  (we are doing it anyway, to empty the clipboard and *become* the owner),
  and then don't close it until a scheduled selection request event
  (with TARGETS target) is received. Process that event by announcing
  all of our supported formats (by that time add_targets() should have
  been called up the stack, thus the formats are known; just in case,
  add_targets() will also schedule a selection request, if one isn't
  scheduled already, so that late-coming formats can still be announced).
* Allow clipboard opening for selection_convert() to be delayed if it
  fails initially.
* The last two points above should fix all the bugs about GTK+ rising
  too much ruckus over OpenClipboard() failures, as owner change
  *is allowed* to fail (though not all callers currently handle
  that case), and selection_convert() is asynchronous to begin with.
  Still, this is somewhat risky, as there's a possibility that the
  code will work in unexpected ways and the clipboard will remain open.
  There's now logging to track the clipboard being opened and closed,
  and a number of failsafes that try to ensure that it isn't kept open
  for no reason.
* Added copious notes on the way clipboard works on X11, Windows and GDK-W32,
  also removed old comments in DnD implementation, replaced some of them
  with the new ones
* A lot of crufty module-global variables are stuffed into a singleton
  object, GdkWin32Selection. It's technically possible to make it a
  sub-object of the Display object (the way Wayland backend does),
  but since Display object on W32 is a singleton anyway... why bother?
* Fixed the send_change_events() a bit (was slightly broken in one of the
  previous iterations)
* Ensure that there's no confusion between selection conversion (an artifact
  term from X11) and selection transmutation (changing the data to be W32-compatible)
* Put all the transmutation code and format-target-matching code into gdkselection-win32.c,
  now this code isn't spread across multiple files.
* Consequently, moved some code away from gdkproperty-win32.c and gdkdnd-win32.c
* Extensive format transmutation checks for OLE2 DnD and clipboard.
  We now keep track of which format mappings are for transmutations,
  and which aren't (for example, when formats are passed as-is, or when
  a registered name is just an alias)
* Put transmutation code into separate functions

* Ensure that drop target keeps a format->target map for supported formats,
  this is useful when selection_convert() is called, as it only receives a
  single target and no hints on the format from which the data should
  be transmuted into this target.
* Add clear_targets() on W32, to de called by GTK
* Use g_set_object() instead of g_ref_object() where it is allowed.
* Fix indentation (and convert tabs to spaces), remove unused variables

(This commit is cherry-picked from the gtk-3-22 branch)

https://bugzilla.gnome.org/show_bug.cgi?id=786509
2017-12-02 10:38:34 +00:00

512 lines
18 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. 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/.
*/
#ifndef __GDK_PRIVATE_WIN32_H__
#define __GDK_PRIVATE_WIN32_H__
#ifndef WINVER
/* Vista or newer */
#define WINVER 0x0600
#endif
#ifndef _WIN32_WINNT
#define _WIN32_WINNT WINVER
#endif
#include <gdk/gdkcursorprivate.h>
#include <gdk/win32/gdkwindow-win32.h>
#include <gdk/win32/gdkwin32display.h>
#include <gdk/win32/gdkwin32screen.h>
#include <gdk/win32/gdkwin32keys.h>
#include <gdk/win32/gdkdevicemanager-win32.h>
#include <gdk/win32/gdkselection-win32.h>
#include "gdkinternals.h"
#include "config.h"
/* Make up for some minor w32api or MSVC6 header lossage */
#ifndef PS_JOIN_MASK
#define PS_JOIN_MASK (PS_JOIN_BEVEL|PS_JOIN_MITER|PS_JOIN_ROUND)
#endif
#ifndef FS_VIETNAMESE
#define FS_VIETNAMESE 0x100
#endif
#ifndef WM_GETOBJECT
#define WM_GETOBJECT 0x3D
#endif
#ifndef WM_NCXBUTTONDOWN
#define WM_NCXBUTTONDOWN 0xAB
#endif
#ifndef WM_NCXBUTTONUP
#define WM_NCXBUTTONUP 0xAC
#endif
#ifndef WM_NCXBUTTONDBLCLK
#define WM_NCXBUTTONDBLCLK 0xAD
#endif
#ifndef WM_CHANGEUISTATE
#define WM_CHANGEUISTATE 0x127
#endif
#ifndef WM_UPDATEUISTATE
#define WM_UPDATEUISTATE 0x128
#endif
#ifndef WM_QUERYUISTATE
#define WM_QUERYUISTATE 0x129
#endif
#ifndef WM_XBUTTONDOWN
#define WM_XBUTTONDOWN 0x20B
#endif
#ifndef WM_XBUTTONUP
#define WM_XBUTTONUP 0x20C
#endif
#ifndef WM_XBUTTONDBLCLK
#define WM_XBUTTONDBLCLK 0x20D
#endif
#ifndef WM_NCMOUSEHOVER
#define WM_NCMOUSEHOVER 0x2A0
#endif
#ifndef WM_NCMOUSELEAVE
#define WM_NCMOUSELEAVE 0x2A2
#endif
#ifndef WM_APPCOMMAND
#define WM_APPCOMMAND 0x319
#endif
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x20E
#endif
#ifndef WM_DPICHANGED
#define WM_DPICHANGED 0x02E0
#endif
/* According to
* http://blog.airesoft.co.uk/2009/11/wm_messages/
* this is the actual internal name MS uses for this undocumented message.
* According to
* https://bugs.winehq.org/show_bug.cgi?id=15055
* wParam is 0
* lParam is a pair of virtual desktop coordinates for the popup
*/
#ifndef WM_SYSMENU
#define WM_SYSMENU 0x313
#endif
#ifndef CF_DIBV5
#define CF_DIBV5 17
#endif
/* Define some combinations of GdkDebugFlags */
#define GDK_DEBUG_EVENTS_OR_INPUT (GDK_DEBUG_EVENTS|GDK_DEBUG_INPUT)
#define GDK_DEBUG_MISC_OR_EVENTS (GDK_DEBUG_MISC|GDK_DEBUG_EVENTS)
GdkWin32Screen *GDK_WINDOW_SCREEN(GObject *win);
#define GDK_WINDOW_IS_WIN32(win) (GDK_IS_WINDOW_IMPL_WIN32 (win->impl))
typedef struct _GdkWin32SingleFont GdkWin32SingleFont;
struct _GdkWin32Cursor
{
GdkCursor cursor;
HCURSOR hcursor;
};
struct _GdkWin32SingleFont
{
HFONT hfont;
UINT charset;
UINT codepage;
FONTSIGNATURE fs;
};
typedef enum {
GDK_WIN32_PE_STATIC,
GDK_WIN32_PE_AVAILABLE,
GDK_WIN32_PE_INUSE
} GdkWin32PalEntryState;
GType _gdk_gc_win32_get_type (void);
gulong _gdk_win32_get_next_tick (gulong suggested_tick);
void _gdk_window_init_position (GdkWindow *window);
void _gdk_window_move_resize_child (GdkWindow *window,
gint x,
gint y,
gint width,
gint height);
gboolean _gdk_win32_window_enable_transparency (GdkWindow *window);
/* GdkWindowImpl methods */
void _gdk_win32_window_scroll (GdkWindow *window,
gint dx,
gint dy);
void _gdk_win32_window_move_region (GdkWindow *window,
const cairo_region_t *region,
gint dx,
gint dy);
void _gdk_win32_selection_init (void);
void _gdk_win32_dnd_exit (void);
GdkDragProtocol _gdk_win32_window_get_drag_protocol (GdkWindow *window,
GdkWindow **target);
void gdk_win32_handle_table_insert (HANDLE *handle,
gpointer data);
void gdk_win32_handle_table_remove (HANDLE handle);
HRGN _gdk_win32_cairo_region_to_hrgn (const cairo_region_t *region,
gint x_origin,
gint y_origin);
cairo_region_t *_gdk_win32_hrgn_to_region (HRGN hrgn,
guint scale);
void _gdk_win32_adjust_client_rect (GdkWindow *window,
RECT *RECT);
void _gdk_selection_property_delete (GdkWindow *);
void _gdk_dropfiles_store (gchar *data);
void _gdk_push_modal_window (GdkWindow *window);
void _gdk_remove_modal_window (GdkWindow *window);
GdkWindow *_gdk_modal_current (void);
gboolean _gdk_modal_blocked (GdkWindow *window);
#ifdef G_ENABLE_DEBUG
void _gdk_win32_print_paletteentries (const PALETTEENTRY *pep,
const int nentries);
void _gdk_win32_print_system_palette (void);
void _gdk_win32_print_hpalette (HPALETTE hpal);
void _gdk_win32_print_dc (HDC hdc);
gchar *_gdk_win32_drag_protocol_to_string (GdkDragProtocol protocol);
gchar *_gdk_win32_window_state_to_string (GdkWindowState state);
gchar *_gdk_win32_window_style_to_string (LONG style);
gchar *_gdk_win32_window_exstyle_to_string (LONG style);
gchar *_gdk_win32_window_pos_bits_to_string (UINT flags);
gchar *_gdk_win32_drag_action_to_string (GdkDragAction actions);
gchar *_gdk_win32_window_description (GdkWindow *d);
gchar *_gdk_win32_rop2_to_string (int rop2);
gchar *_gdk_win32_lbstyle_to_string (UINT brush_style);
gchar *_gdk_win32_pstype_to_string (DWORD pen_style);
gchar *_gdk_win32_psstyle_to_string (DWORD pen_style);
gchar *_gdk_win32_psendcap_to_string (DWORD pen_style);
gchar *_gdk_win32_psjoin_to_string (DWORD pen_style);
gchar *_gdk_win32_message_to_string (UINT msg);
gchar *_gdk_win32_key_to_string (LONG lParam);
gchar *_gdk_win32_cf_to_string (UINT format);
gchar *_gdk_win32_data_to_string (const guchar*data,
int nbytes);
gchar *_gdk_win32_rect_to_string (const RECT *rect);
gchar *_gdk_win32_gdkrectangle_to_string (const GdkRectangle *rect);
gchar *_gdk_win32_cairo_region_to_string (const cairo_region_t *box);
void _gdk_win32_print_event (const GdkEvent *event);
#endif
gchar *_gdk_win32_last_error_string (void);
void _gdk_win32_api_failed (const gchar *where,
const gchar *api);
void _gdk_other_api_failed (const gchar *where,
const gchar *api);
#define WIN32_API_FAILED(api) _gdk_win32_api_failed (G_STRLOC , api)
#define WIN32_GDI_FAILED(api) WIN32_API_FAILED (api)
#define OTHER_API_FAILED(api) _gdk_other_api_failed (G_STRLOC, api)
/* These two macros call a GDI or other Win32 API and if the return
* value is zero or NULL, print a warning message. The majority of GDI
* calls return zero or NULL on failure. The value of the macros is nonzero
* if the call succeeded, zero otherwise.
*/
#define GDI_CALL(api, arglist) (api arglist ? 1 : (WIN32_GDI_FAILED (#api), 0))
#define API_CALL(api, arglist) (api arglist ? 1 : (WIN32_API_FAILED (#api), 0))
extern LRESULT CALLBACK _gdk_win32_window_procedure (HWND, UINT, WPARAM, LPARAM);
extern GdkDisplay *_gdk_display;
extern GdkDeviceManagerWin32 *_gdk_device_manager;
/* Offsets to add to Windows coordinates (which are relative to the
* primary monitor's origin, and thus might be negative for monitors
* to the left and/or above the primary monitor) to get GDK
* coordinates, which should be non-negative on the whole screen.
*/
extern gint _gdk_offset_x, _gdk_offset_y;
extern HDC _gdk_display_hdc;
extern HINSTANCE _gdk_dll_hinstance;
extern HINSTANCE _gdk_app_hmodule;
extern gint _gdk_input_ignore_core;
/* These are thread specific, but GDK/win32 works OK only when invoked
* from a single thread anyway.
*/
extern HKL _gdk_input_locale;
extern gboolean _gdk_input_locale_is_ime;
extern UINT _gdk_input_codepage;
extern guint _gdk_keymap_serial;
/* The singleton selection object pointer */
GdkWin32Selection *_win32_selection;
void _gdk_win32_dnd_do_dragdrop (void);
void _gdk_win32_ole2_dnd_property_change (GdkAtom type,
gint format,
const guchar *data,
gint nelements);
typedef enum {
GDK_WIN32_MODAL_OP_NONE = 0x0,
GDK_WIN32_MODAL_OP_SIZE = 0x1 << 0,
GDK_WIN32_MODAL_OP_MOVE = 0x1 << 1,
GDK_WIN32_MODAL_OP_MENU = 0x1 << 2,
GDK_WIN32_MODAL_OP_DND = 0x1 << 3
} GdkWin32ModalOpKind;
#define GDK_WIN32_MODAL_OP_SIZEMOVE_MASK (GDK_WIN32_MODAL_OP_SIZE | GDK_WIN32_MODAL_OP_MOVE)
/* Non-zero while a modal sizing, moving, or dnd operation is in progress */
extern GdkWin32ModalOpKind _modal_operation_in_progress;
extern HWND _modal_move_resize_window;
void _gdk_win32_begin_modal_call (GdkWin32ModalOpKind kind);
void _gdk_win32_end_modal_call (GdkWin32ModalOpKind kind);
/* Options */
extern gboolean _gdk_input_ignore_wintab;
extern gint _gdk_max_colors;
/* Convert a pixbuf to an HICON (or HCURSOR). Supports alpha under
* Windows XP, thresholds alpha otherwise.
*/
HICON _gdk_win32_texture_to_hicon (GdkTexture *texture);
HICON _gdk_win32_pixbuf_to_hcursor (GdkPixbuf *pixbuf,
gint x_hotspot,
gint y_hotspot);
void _gdk_win32_display_init_cursors (GdkWin32Display *display);
void _gdk_win32_display_finalize_cursors (GdkWin32Display *display);
void _gdk_win32_display_update_cursors (GdkWin32Display *display);
GdkCursor *_gdk_win32_display_get_cursor_for_name (GdkDisplay *display, const gchar* cursor_name);
GdkCursor *gdk_win32_display_cursor_from_hcursor (GdkDisplay *display, HCURSOR hcursor);
typedef struct _Win32CursorTheme Win32CursorTheme;
struct _Win32CursorTheme {
GHashTable *named_cursors;
};
typedef enum GdkWin32CursorLoadType {
GDK_WIN32_CURSOR_LOAD_FROM_FILE = 0,
GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_NULL = 1,
GDK_WIN32_CURSOR_LOAD_FROM_RESOURCE_THIS = 2,
GDK_WIN32_CURSOR_CREATE = 3,
} GdkWin32CursorLoadType;
typedef struct _Win32Cursor Win32Cursor;
struct _Win32Cursor {
GdkWin32CursorLoadType load_type;
gunichar2 *resource_name;
gint width;
gint height;
guint load_flags;
gint xcursor_number;
};
Win32CursorTheme *win32_cursor_theme_load (const gchar *name,
gint size);
Win32Cursor * win32_cursor_theme_get_cursor (Win32CursorTheme *theme,
const gchar *name);
void win32_cursor_theme_destroy (Win32CursorTheme *theme);
Win32CursorTheme *_gdk_win32_display_get_cursor_theme (GdkWin32Display *win32_display);
/* GdkDisplay member functions */
void _gdk_win32_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height);
void _gdk_win32_display_get_maximal_cursor_size (GdkDisplay *display,
guint *width,
guint *height);
gboolean _gdk_win32_display_supports_cursor_alpha (GdkDisplay *display);
gboolean _gdk_win32_display_supports_cursor_color (GdkDisplay *display);
GList *_gdk_win32_display_list_devices (GdkDisplay *dpy);
gboolean _gdk_win32_display_has_pending (GdkDisplay *display);
void _gdk_win32_display_queue_events (GdkDisplay *display);
gboolean _gdk_win32_selection_owner_set_for_display (GdkDisplay *display,
GdkWindow *owner,
GdkAtom selection,
guint32 time,
gboolean send_event);
GdkWindow *_gdk_win32_display_get_selection_owner (GdkDisplay *display,
GdkAtom selection);
gboolean _gdk_win32_display_set_selection_owner (GdkDisplay *display,
GdkWindow *owner,
GdkAtom selection,
guint32 time,
gboolean send_event);
void _gdk_win32_display_send_selection_notify (GdkDisplay *display,
GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
GdkAtom property,
guint32 time);
gint _gdk_win32_display_get_selection_property (GdkDisplay *display,
GdkWindow *requestor,
guchar **data,
GdkAtom *ret_type,
gint *ret_format);
void gdk_win32_display_clear_selection_targets (GdkDisplay *display,
GdkAtom selection);
void gdk_win32_display_add_selection_targets (GdkDisplay *display,
GdkWindow *window,
GdkAtom selection,
GdkAtom *targets,
guint ntargets);
void _gdk_win32_display_convert_selection (GdkDisplay *display,
GdkWindow *requestor,
GdkAtom selection,
GdkAtom target,
guint32 time);
gint _gdk_win32_display_text_property_to_utf8_list (GdkDisplay *display,
GdkAtom encoding,
gint format,
const guchar *text,
gint length,
gchar ***list);
gchar *_gdk_win32_display_utf8_to_string_target (GdkDisplay *display, const gchar *str);
gboolean _gdk_win32_keymap_has_altgr (GdkWin32Keymap *keymap);
guint8 _gdk_win32_keymap_get_active_group (GdkWin32Keymap *keymap);
guint8 _gdk_win32_keymap_get_rshift_scancode (GdkWin32Keymap *keymap);
void _gdk_win32_keymap_set_active_layout (GdkWin32Keymap *keymap,
HKL hkl);
GdkKeymap *_gdk_win32_display_get_keymap (GdkDisplay *display);
void _gdk_win32_display_create_window_impl (GdkDisplay *display,
GdkWindow *window,
GdkWindow *real_parent,
GdkEventMask event_mask,
GdkWindowAttr *attributes);
/* stray GdkWindowImplWin32 members */
void _gdk_win32_window_register_dnd (GdkWindow *window);
GdkDragContext *_gdk_win32_window_drag_begin (GdkWindow *window,
GdkDevice *device,
GdkContentFormats *formats,
gint x_root,
gint y_root);
gint _gdk_win32_window_get_property (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gulong offset,
gulong length,
gint pdelete,
GdkAtom *actual_property_type,
gint *actual_format_type,
gint *actual_length,
guchar **data);
void _gdk_win32_window_change_property (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gint format,
GdkPropMode mode,
const guchar *data,
gint nelements);
void _gdk_win32_window_delete_property (GdkWindow *window, GdkAtom property);
void gdk_win32_selection_clear_targets (GdkDisplay *display,
GdkAtom selection);
/* Stray GdkWin32Screen members */
gboolean _gdk_win32_get_setting (const gchar *name, GValue *value);
void _gdk_win32_screen_on_displaychange_event (GdkWin32Screen *screen);
GdkWindow *gdk_win32_screen_get_root_window (GdkWin32Screen *screen);
GdkWindow *gdk_win32_display_get_root_window (GdkDisplay *display);
/* Distributed display manager implementation */
GdkDisplay *_gdk_win32_display_open (const gchar *display_name);
GdkAtom _gdk_win32_display_manager_atom_intern (GdkDisplayManager *manager,
const gchar *atom_name,
gint only_if_exists);
gchar *_gdk_win32_display_manager_get_atom_name (GdkDisplayManager *manager,
GdkAtom atom);
void _gdk_win32_append_event (GdkEvent *event);
void _gdk_win32_emit_configure_event (GdkWindow *window);
guint32 _gdk_win32_keymap_get_decimal_mark (GdkWin32Keymap *keymap);
void _gdk_win32_window_handle_aerosnap (GdkWindow *window,
GdkWin32AeroSnapCombo combo);
gboolean _gdk_win32_get_window_rect (GdkWindow *window,
RECT *rect);
void _gdk_win32_do_emit_configure_event (GdkWindow *window,
RECT rect);
void gdk_win32_window_do_move_resize_drag (GdkWindow *window,
gint x,
gint y);
void gdk_win32_window_end_move_resize_drag (GdkWindow *window);
gboolean _gdk_win32_window_fill_min_max_info (GdkWindow *window,
MINMAXINFO *mmi);
gboolean _gdk_win32_window_lacks_wm_decorations (GdkWindow *window);
BOOL WINAPI GtkShowWindow (GdkWindow *window,
int cmd_show);
/* Initialization */
void _gdk_win32_windowing_init (void);
void _gdk_dnd_init (void);
void _gdk_events_init (GdkDisplay *display);
#endif /* __GDK_PRIVATE_WIN32_H__ */