1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 #include "gdkcursor.h"
30 #include "gdkcursorprivate.h"
31 #include "gdkdisplayprivate.h"
32 #include "gdkinternals.h"
37 * @Short_description: Standard and pixmap cursors
40 * These functions are used to create and destroy cursors.
41 * There is a number of standard cursors, but it is also
42 * possible to construct new cursors from pixbufs. There
43 * may be limitations as to what kinds of cursors can be
44 * constructed on a given display, see
45 * gdk_display_supports_cursor_alpha(),
46 * gdk_display_supports_cursor_color(),
47 * gdk_display_get_default_cursor_size() and
48 * gdk_display_get_maximal_cursor_size().
50 * Cursors by themselves are not very interesting, they must be be
51 * bound to a window for users to see them. This is done with
52 * gdk_window_set_cursor() or by setting the cursor member of the
53 * #GdkWindowAttr struct passed to gdk_window_new().
59 * The #GdkCursor structure represents a cursor. Its contents are private.
62 G_DEFINE_BOXED_TYPE (GdkCursor, gdk_cursor,
68 * @cursor: a #GdkCursor
70 * Adds a reference to @cursor.
72 * Return value: Same @cursor that was passed in
75 gdk_cursor_ref (GdkCursor *cursor)
77 g_return_val_if_fail (cursor != NULL, NULL);
78 g_return_val_if_fail (cursor->ref_count > 0, NULL);
80 cursor->ref_count += 1;
87 * @cursor: a #GdkCursor
89 * Removes a reference from @cursor, deallocating the cursor
90 * if no references remain.
93 gdk_cursor_unref (GdkCursor *cursor)
95 g_return_if_fail (cursor != NULL);
96 g_return_if_fail (cursor->ref_count > 0);
98 cursor->ref_count -= 1;
100 if (cursor->ref_count == 0)
101 _gdk_cursor_destroy (cursor);
106 * @cursor_type: cursor to create
108 * Creates a new cursor from the set of builtin cursors for the default display.
109 * See gdk_cursor_new_for_display().
111 * To make the cursor invisible, use %GDK_BLANK_CURSOR.
113 * Return value: a new #GdkCursor
116 gdk_cursor_new (GdkCursorType cursor_type)
118 return gdk_cursor_new_for_display (gdk_display_get_default(), cursor_type);
122 * gdk_cursor_get_cursor_type:
123 * @cursor: a #GdkCursor
125 * Returns the cursor type for this cursor.
127 * Return value: a #GdkCursorType
132 gdk_cursor_get_cursor_type (GdkCursor *cursor)
134 g_return_val_if_fail (cursor != NULL, GDK_BLANK_CURSOR);
140 * gdk_cursor_new_for_display:
141 * @display: the #GdkDisplay for which the cursor will be created
142 * @cursor_type: cursor to create
144 * Creates a new cursor from the set of builtin cursors.
145 * Some useful ones are:
148 * <inlinegraphic format="PNG" fileref="right_ptr.png"></inlinegraphic> #GDK_RIGHT_PTR (right-facing arrow)
151 * <inlinegraphic format="PNG" fileref="crosshair.png"></inlinegraphic> #GDK_CROSSHAIR (crosshair)
154 * <inlinegraphic format="PNG" fileref="xterm.png"></inlinegraphic> #GDK_XTERM (I-beam)
157 * <inlinegraphic format="PNG" fileref="watch.png"></inlinegraphic> #GDK_WATCH (busy)
160 * <inlinegraphic format="PNG" fileref="fleur.png"></inlinegraphic> #GDK_FLEUR (for moving objects)
163 * <inlinegraphic format="PNG" fileref="hand1.png"></inlinegraphic> #GDK_HAND1 (a right-pointing hand)
166 * <inlinegraphic format="PNG" fileref="hand2.png"></inlinegraphic> #GDK_HAND2 (a left-pointing hand)
169 * <inlinegraphic format="PNG" fileref="left_side.png"></inlinegraphic> #GDK_LEFT_SIDE (resize left side)
172 * <inlinegraphic format="PNG" fileref="right_side.png"></inlinegraphic> #GDK_RIGHT_SIDE (resize right side)
175 * <inlinegraphic format="PNG" fileref="top_left_corner.png"></inlinegraphic> #GDK_TOP_LEFT_CORNER (resize northwest corner)
178 * <inlinegraphic format="PNG" fileref="top_right_corner.png"></inlinegraphic> #GDK_TOP_RIGHT_CORNER (resize northeast corner)
181 * <inlinegraphic format="PNG" fileref="bottom_left_corner.png"></inlinegraphic> #GDK_BOTTOM_LEFT_CORNER (resize southwest corner)
184 * <inlinegraphic format="PNG" fileref="bottom_right_corner.png"></inlinegraphic> #GDK_BOTTOM_RIGHT_CORNER (resize southeast corner)
187 * <inlinegraphic format="PNG" fileref="top_side.png"></inlinegraphic> #GDK_TOP_SIDE (resize top side)
190 * <inlinegraphic format="PNG" fileref="bottom_side.png"></inlinegraphic> #GDK_BOTTOM_SIDE (resize bottom side)
193 * <inlinegraphic format="PNG" fileref="sb_h_double_arrow.png"></inlinegraphic> #GDK_SB_H_DOUBLE_ARROW (move vertical splitter)
196 * <inlinegraphic format="PNG" fileref="sb_v_double_arrow.png"></inlinegraphic> #GDK_SB_V_DOUBLE_ARROW (move horizontal splitter)
199 * #GDK_BLANK_CURSOR (Blank cursor). Since 2.16
203 * Return value: a new #GdkCursor
208 gdk_cursor_new_for_display (GdkDisplay *display,
209 GdkCursorType cursor_type)
211 g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
213 return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_type (display, cursor_type);
217 * gdk_cursor_new_from_name:
218 * @display: the #GdkDisplay for which the cursor will be created
219 * @name: the name of the cursor
221 * Creates a new cursor by looking up @name in the current cursor
224 * Returns: a new #GdkCursor, or %NULL if there is no cursor with
230 gdk_cursor_new_from_name (GdkDisplay *display,
233 g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
235 return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_name (display, name);
239 * gdk_cursor_new_from_pixbuf:
240 * @display: the #GdkDisplay for which the cursor will be created
241 * @pixbuf: the #GdkPixbuf containing the cursor image
242 * @x: the horizontal offset of the 'hotspot' of the cursor.
243 * @y: the vertical offset of the 'hotspot' of the cursor.
245 * Creates a new cursor from a pixbuf.
247 * Not all GDK backends support RGBA cursors. If they are not
248 * supported, a monochrome approximation will be displayed.
249 * The functions gdk_display_supports_cursor_alpha() and
250 * gdk_display_supports_cursor_color() can be used to determine
251 * whether RGBA cursors are supported;
252 * gdk_display_get_default_cursor_size() and
253 * gdk_display_get_maximal_cursor_size() give information about
256 * If @x or @y are <literal>-1</literal>, the pixbuf must have
257 * options named "x_hot" and "y_hot", resp., containing
258 * integer values between %0 and the width resp. height of
259 * the pixbuf. (Since: 3.0)
261 * On the X backend, support for RGBA cursors requires a
262 * sufficently new version of the X Render extension.
264 * Returns: a new #GdkCursor.
269 gdk_cursor_new_from_pixbuf (GdkDisplay *display,
274 g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
275 g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
277 return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_pixbuf (display, pixbuf, x, y);