Learning_GTK4_tree/gdk/win32/gdkwin32dnd-private.h

101 lines
3.0 KiB
C
Raw Permalink Normal View History

2023-12-12 11:36:42 +01:00
/* GDK - The GIMP Drawing Kit
* Copyright (C) 2010 Red Hat, Inc.
*
* 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/>.
*/
#pragma once
#if !defined (__GDKWIN32_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gdk/gdkwin32.h> can be included directly."
#endif
#include <gdk/gdk.h>
#include "gdk/gdkdragprivate.h"
G_BEGIN_DECLS
typedef struct _GdkWin32DragUtilityData GdkWin32DragUtilityData;
/* This structure is deliberately designed to be
* copiable with memcpy(), i.e. no pointers inside.
*/
struct _GdkWin32DragUtilityData
{
int last_x; /* Coordinates from last event, in GDK space */
int last_y;
DWORD last_key_state; /* Key state from last event */
GdkWin32DndState state;
};
struct _GdkWin32Drag
{
GdkDrag drag;
/* The drag protocol being used */
GdkDragProtocol protocol;
/* The surface used for grabs.
* Usually the same as GdkDrag->source_surface
*/
GdkSurface *grab_surface;
/* The window currently under cursor.
* Will be INVALID_HANDLE_VALUE (not NULL!) if it is not known
*/
HWND dest_window;
/* The surface that we move along with the cursor to indicate
* what exactly is being dragged.
*/
GdkSurface *drag_surface;
GdkCursor *cursor;
GdkSeat *grab_seat;
/* Used to keep track of current drag action, and
* emit an "action-changed" signal whenever it changes.
* In the end the actual action is decided on the basis of
* the last information we receive from the drop site, this
* field is not used for that purpose.
*/
GdkDragAction current_action;
GdkWin32DragUtilityData util_data;
guint scale; /* Temporarily caches the HiDPI scale */
int hot_x; /* Hotspot offset from the top-left of the drag-window, scaled (can be added to GDK space coordinates) */
int hot_y;
int start_x; /* Coordinates of the drag start, in GDK space */
int start_y;
guint drag_status : 4; /* Current status of drag */
guint drop_failed : 1; /* Whether the drop was unsuccessful */
guint handle_events : 1; /* Whether handle_event() should do anything */
};
struct _GdkWin32DragClass
{
GdkDragClass parent_class;
};
gpointer _gdk_win32_dnd_thread_main (gpointer data);
GdkDrag *_gdk_win32_find_drag_for_dest_window (HWND dest_window);
G_END_DECLS