/* 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 .
*/
/*
* 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/.
*/
#include "config.h"
#include "gdkcursor.h"
#include "gdkcursorprivate.h"
#include "gdkdisplayprivate.h"
#include "gdkintl.h"
#include "gdkinternals.h"
/**
* SECTION:cursors
* @Short_description: Standard and pixmap cursors
* @Title: Cursors
*
* These functions are used to create and destroy cursors.
* There is a number of standard cursors, but it is also
* possible to construct new cursors from pixbufs. There
* may be limitations as to what kinds of cursors can be
* constructed on a given display, see
* gdk_display_supports_cursor_alpha(),
* gdk_display_supports_cursor_color(),
* gdk_display_get_default_cursor_size() and
* gdk_display_get_maximal_cursor_size().
*
* Cursors by themselves are not very interesting, they must be be
* bound to a window for users to see them. This is done with
* gdk_window_set_cursor() or by setting the cursor member of the
* #GdkWindowAttr struct passed to gdk_window_new().
*/
/**
* GdkCursor:
*
* The #GdkCursor structure represents a cursor. Its contents are private.
*/
enum {
PROP_0,
PROP_CURSOR_TYPE,
PROP_DISPLAY
};
G_DEFINE_ABSTRACT_TYPE (GdkCursor, gdk_cursor, G_TYPE_OBJECT)
static void
gdk_cursor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GdkCursor *cursor = GDK_CURSOR (object);
switch (prop_id)
{
case PROP_CURSOR_TYPE:
g_value_set_enum (value, cursor->type);
break;
case PROP_DISPLAY:
g_value_set_object (value, cursor->display);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_cursor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GdkCursor *cursor = GDK_CURSOR (object);
switch (prop_id)
{
case PROP_CURSOR_TYPE:
cursor->type = g_value_get_enum (value);
break;
case PROP_DISPLAY:
cursor->display = g_value_get_object (value);
/* check that implementations actually provide the display when constructing */
g_assert (cursor->display != NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gdk_cursor_class_init (GdkCursorClass *cursor_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (cursor_class);
object_class->get_property = gdk_cursor_get_property;
object_class->set_property = gdk_cursor_set_property;
g_object_class_install_property (object_class,
PROP_CURSOR_TYPE,
g_param_spec_enum ("cursor-type",
P_("Cursor type"),
P_("Standard cursor type"),
GDK_TYPE_CURSOR_TYPE, GDK_X_CURSOR,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_DISPLAY,
g_param_spec_object ("display",
P_("Display"),
P_("Display of this cursor"),
GDK_TYPE_DISPLAY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
gdk_cursor_init (GdkCursor *cursor)
{
}
/**
* gdk_cursor_ref:
* @cursor: a #GdkCursor
*
* Adds a reference to @cursor.
*
* Return value: (transfer full): Same @cursor that was passed in
*
* Deprecated: 3.0: Use g_object_ref() instead
*/
GdkCursor*
gdk_cursor_ref (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, NULL);
return g_object_ref (cursor);
}
/**
* gdk_cursor_unref:
* @cursor: a #GdkCursor
*
* Removes a reference from @cursor, deallocating the cursor
* if no references remain.
*
* Deprecated: 3.0: Use g_object_unref() instead
*/
void
gdk_cursor_unref (GdkCursor *cursor)
{
g_return_if_fail (cursor != NULL);
g_object_unref (cursor);
}
/**
* gdk_cursor_new:
* @cursor_type: cursor to create
*
* Creates a new cursor from the set of builtin cursors for the default display.
* See gdk_cursor_new_for_display().
*
* To make the cursor invisible, use %GDK_BLANK_CURSOR.
*
* Return value: a new #GdkCursor
*/
GdkCursor*
gdk_cursor_new (GdkCursorType cursor_type)
{
return gdk_cursor_new_for_display (gdk_display_get_default(), cursor_type);
}
/**
* gdk_cursor_get_cursor_type:
* @cursor: a #GdkCursor
*
* Returns the cursor type for this cursor.
*
* Return value: a #GdkCursorType
*
* Since: 2.22
**/
GdkCursorType
gdk_cursor_get_cursor_type (GdkCursor *cursor)
{
g_return_val_if_fail (cursor != NULL, GDK_BLANK_CURSOR);
return cursor->type;
}
/**
* gdk_cursor_new_for_display:
* @display: the #GdkDisplay for which the cursor will be created
* @cursor_type: cursor to create
*
* Creates a new cursor from the set of builtin cursors.
* Some useful ones are:
*
*
* #GDK_RIGHT_PTR (right-facing arrow)
*
*
* #GDK_CROSSHAIR (crosshair)
*
*
* #GDK_XTERM (I-beam)
*
*
* #GDK_WATCH (busy)
*
*
* #GDK_FLEUR (for moving objects)
*
*
* #GDK_HAND1 (a right-pointing hand)
*
*
* #GDK_HAND2 (a left-pointing hand)
*
*
* #GDK_LEFT_SIDE (resize left side)
*
*
* #GDK_RIGHT_SIDE (resize right side)
*
*
* #GDK_TOP_LEFT_CORNER (resize northwest corner)
*
*
* #GDK_TOP_RIGHT_CORNER (resize northeast corner)
*
*
* #GDK_BOTTOM_LEFT_CORNER (resize southwest corner)
*
*
* #GDK_BOTTOM_RIGHT_CORNER (resize southeast corner)
*
*
* #GDK_TOP_SIDE (resize top side)
*
*
* #GDK_BOTTOM_SIDE (resize bottom side)
*
*
* #GDK_SB_H_DOUBLE_ARROW (move vertical splitter)
*
*
* #GDK_SB_V_DOUBLE_ARROW (move horizontal splitter)
*
*
* #GDK_BLANK_CURSOR (Blank cursor). Since 2.16
*
*
*
* Return value: a new #GdkCursor
*
* Since: 2.2
**/
GdkCursor*
gdk_cursor_new_for_display (GdkDisplay *display,
GdkCursorType cursor_type)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_type (display, cursor_type);
}
/**
* gdk_cursor_new_from_name:
* @display: the #GdkDisplay for which the cursor will be created
* @name: the name of the cursor
*
* Creates a new cursor by looking up @name in the current cursor
* theme.
*
* Returns: a new #GdkCursor, or %NULL if there is no cursor with
* the given name
*
* Since: 2.8
*/
GdkCursor*
gdk_cursor_new_from_name (GdkDisplay *display,
const gchar *name)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_name (display, name);
}
/**
* gdk_cursor_new_from_pixbuf:
* @display: the #GdkDisplay for which the cursor will be created
* @pixbuf: the #GdkPixbuf containing the cursor image
* @x: the horizontal offset of the 'hotspot' of the cursor.
* @y: the vertical offset of the 'hotspot' of the cursor.
*
* Creates a new cursor from a pixbuf.
*
* Not all GDK backends support RGBA cursors. If they are not
* supported, a monochrome approximation will be displayed.
* The functions gdk_display_supports_cursor_alpha() and
* gdk_display_supports_cursor_color() can be used to determine
* whether RGBA cursors are supported;
* gdk_display_get_default_cursor_size() and
* gdk_display_get_maximal_cursor_size() give information about
* cursor sizes.
*
* If @x or @y are -1, the pixbuf must have
* options named "x_hot" and "y_hot", resp., containing
* integer values between %0 and the width resp. height of
* the pixbuf. (Since: 3.0)
*
* On the X backend, support for RGBA cursors requires a
* sufficently new version of the X Render extension.
*
* Returns: a new #GdkCursor.
*
* Since: 2.4
*/
GdkCursor *
gdk_cursor_new_from_pixbuf (GdkDisplay *display,
GdkPixbuf *pixbuf,
gint x,
gint y)
{
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_pixbuf (display, pixbuf, x, y);
}
/**
* gdk_cursor_get_display:
* @cursor: a #GdkCursor.
*
* Returns the display on which the #GdkCursor is defined.
*
* Returns: (transfer none): the #GdkDisplay associated to @cursor
*
* Since: 2.2
*/
GdkDisplay *
gdk_cursor_get_display (GdkCursor *cursor)
{
g_return_val_if_fail (GDK_IS_CURSOR (cursor), NULL);
return cursor->display;
}
/**
* gdk_cursor_get_image:
* @cursor: a #GdkCursor
*
* Returns a #GdkPixbuf with the image used to display the cursor.
*
* Note that depending on the capabilities of the windowing system and
* on the cursor, GDK may not be able to obtain the image data. In this
* case, %NULL is returned.
*
* Returns: (transfer full): a #GdkPixbuf representing @cursor, or %NULL
*
* Since: 2.8
*/
GdkPixbuf*
gdk_cursor_get_image (GdkCursor *cursor)
{
g_return_val_if_fail (GDK_IS_CURSOR (cursor), NULL);
return GDK_CURSOR_GET_CLASS (cursor)->get_image (cursor);
}