forked from AuroraMiddleware/gtk
505 lines
14 KiB
C
505 lines
14 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/.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#define GDK_PIXBUF_ENABLE_BACKEND
|
|
#include <gdk-pixbuf/gdk-pixbuf.h>
|
|
|
|
#include "gdkcursor.h"
|
|
#include "gdkcursorprivate.h"
|
|
#include "gdkdisplayprivate.h"
|
|
#include "gdkintl.h"
|
|
#include "gdkinternals.h"
|
|
|
|
#include <math.h>
|
|
#include <errno.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 passed to gdk_window_new().
|
|
*/
|
|
|
|
/**
|
|
* GdkCursor:
|
|
*
|
|
* A #GdkCursor 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.
|
|
*
|
|
* Returns: (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.
|
|
*
|
|
* Returns: 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.
|
|
*
|
|
* Returns: 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
|
|
*
|
|
* Returns: 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: (nullable): 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)
|
|
{
|
|
cairo_surface_t *surface;
|
|
const char *option;
|
|
char *end;
|
|
gint64 value;
|
|
GdkCursor *cursor;
|
|
|
|
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
|
|
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
|
|
|
|
if (x == -1 && (option = gdk_pixbuf_get_option (pixbuf, "x_hot")))
|
|
{
|
|
errno = 0;
|
|
end = NULL;
|
|
value = g_ascii_strtoll (option, &end, 10);
|
|
if (errno == 0 &&
|
|
end != option &&
|
|
value >= 0 && value < G_MAXINT)
|
|
x = (gint) value;
|
|
}
|
|
|
|
if (y == -1 && (option = gdk_pixbuf_get_option (pixbuf, "y_hot")))
|
|
{
|
|
errno = 0;
|
|
end = NULL;
|
|
value = g_ascii_strtoll (option, &end, 10);
|
|
if (errno == 0 &&
|
|
end != option &&
|
|
value >= 0 && value < G_MAXINT)
|
|
y = (gint) value;
|
|
}
|
|
|
|
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
|
|
|
|
cursor = GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_surface (display, surface, x, y);
|
|
|
|
cairo_surface_destroy (surface);
|
|
|
|
return cursor;
|
|
}
|
|
|
|
/**
|
|
* gdk_cursor_new_from_surface:
|
|
* @display: the #GdkDisplay for which the cursor will be created
|
|
* @surface: the cairo image surface containing the cursor pixel data
|
|
* @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 cairo image surface.
|
|
*
|
|
* 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.
|
|
*
|
|
* On the X backend, support for RGBA cursors requires a
|
|
* sufficently new version of the X Render extension.
|
|
*
|
|
* Returns: a new #GdkCursor.
|
|
*
|
|
* Since: 3.10
|
|
*/
|
|
GdkCursor *
|
|
gdk_cursor_new_from_surface (GdkDisplay *display,
|
|
cairo_surface_t *surface,
|
|
gdouble x,
|
|
gdouble y)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
|
|
g_return_val_if_fail (surface != NULL, NULL);
|
|
g_return_val_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE, NULL);
|
|
g_return_val_if_fail (0 <= x && x < cairo_image_surface_get_width (surface), NULL);
|
|
g_return_val_if_fail (0 <= y && y < cairo_image_surface_get_height (surface), NULL);
|
|
|
|
return GDK_DISPLAY_GET_CLASS (display)->get_cursor_for_surface (display,
|
|
surface, 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: (nullable) (transfer full): a #GdkPixbuf representing
|
|
* @cursor, or %NULL
|
|
*
|
|
* Since: 2.8
|
|
*/
|
|
GdkPixbuf*
|
|
gdk_cursor_get_image (GdkCursor *cursor)
|
|
{
|
|
int w, h;
|
|
cairo_surface_t *surface;
|
|
GdkPixbuf *pixbuf;
|
|
gchar buf[32];
|
|
double x_hot, y_hot;
|
|
double x_scale, y_scale;
|
|
|
|
g_return_val_if_fail (GDK_IS_CURSOR (cursor), NULL);
|
|
|
|
surface = gdk_cursor_get_surface (cursor, &x_hot, &y_hot);
|
|
if (surface == NULL)
|
|
return NULL;
|
|
|
|
w = cairo_image_surface_get_width (surface);
|
|
h = cairo_image_surface_get_height (surface);
|
|
|
|
x_scale = y_scale = 1;
|
|
#ifdef HAVE_CAIRO_SURFACE_SET_DEVICE_SCALE
|
|
cairo_surface_get_device_scale (surface, &x_scale, &y_scale);
|
|
#endif
|
|
|
|
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0, w, h);
|
|
cairo_surface_destroy (surface);
|
|
|
|
if (x_scale != 1)
|
|
{
|
|
GdkPixbuf *old;
|
|
|
|
old = pixbuf;
|
|
pixbuf = gdk_pixbuf_scale_simple (old,
|
|
w / x_scale, h / y_scale,
|
|
GDK_INTERP_HYPER);
|
|
g_object_unref (old);
|
|
}
|
|
|
|
|
|
g_snprintf (buf, 32, "%d", (int)x_hot);
|
|
gdk_pixbuf_set_option (pixbuf, "x_hot", buf);
|
|
|
|
g_snprintf (buf, 32, "%d", (int)y_hot);
|
|
gdk_pixbuf_set_option (pixbuf, "y_hot", buf);
|
|
|
|
return pixbuf;
|
|
}
|
|
|
|
/**
|
|
* gdk_cursor_get_surface:
|
|
* @cursor: a #GdkCursor
|
|
* @x_hot: Location to store the hotspot x position, or %NULL
|
|
* @y_hot: Location to store the hotspot y position, or %NULL
|
|
*
|
|
* Returns a cairo image surface 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: (nullable) (transfer full): a #cairo_surface_t
|
|
* representing @cursor, or %NULL
|
|
*
|
|
* Since: 3.10
|
|
*/
|
|
cairo_surface_t *
|
|
gdk_cursor_get_surface (GdkCursor *cursor,
|
|
gdouble *x_hot,
|
|
gdouble *y_hot)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_CURSOR (cursor), NULL);
|
|
|
|
return GDK_CURSOR_GET_CLASS (cursor)->get_surface (cursor, x_hot, y_hot);
|
|
}
|