gtk/gdk/gdkdevice.h

/* GDK - The GIMP Drawing Kit
 * Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
 *
 * 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif

#ifndef __GDK_DEVICE_H__
#define __GDK_DEVICE_H__

#include <gdk/gdktypes.h>


G_BEGIN_DECLS

#define GDK_TYPE_DEVICE         (gdk_device_get_type ())
#define GDK_DEVICE(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GDK_TYPE_DEVICE, GdkDevice))
#define GDK_IS_DEVICE(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GDK_TYPE_DEVICE))

typedef struct _GdkDevice GdkDevice;
typedef struct _GdkDevicePrivate GdkDevicePrivate;

typedef struct _GdkDeviceKey GdkDeviceKey;
typedef struct _GdkDeviceAxis GdkDeviceAxis;
typedef struct _GdkTimeCoord GdkTimeCoord;

/**
 * GdkExtensionMode:
 * @GDK_EXTENSION_EVENTS_NONE: no extension events are desired.
 * @GDK_EXTENSION_EVENTS_ALL: all extension events are desired.
 * @GDK_EXTENSION_EVENTS_CURSOR: extension events are desired only if a cursor
 *                               will be displayed for the device.
 *
 * An enumeration used to specify which extension events
 * are desired for a particular widget.
 */
typedef enum
{
  GDK_EXTENSION_EVENTS_NONE,
  GDK_EXTENSION_EVENTS_ALL,
  GDK_EXTENSION_EVENTS_CURSOR
} GdkExtensionMode;

/**
 * GdkInputSource:
 * @GDK_SOURCE_MOUSE: the device is a mouse. (This will be reported for the core
 *                    pointer, even if it is something else, such as a trackball.)
 * @GDK_SOURCE_PEN: the device is a stylus of a graphics tablet or similar device.
 * @GDK_SOURCE_ERASER: the device is an eraser. Typically, this would be the other end
 *                     of a stylus on a graphics tablet.
 * @GDK_SOURCE_CURSOR: the device is a graphics tablet "puck" or similar device.
 * @GDK_SOURCE_KEYBOARD: the device is a keyboard.
 *
 * An enumeration describing the type of an input device in general terms.
 */
typedef enum
{
  GDK_SOURCE_MOUSE,
  GDK_SOURCE_PEN,
  GDK_SOURCE_ERASER,
  GDK_SOURCE_CURSOR,
  GDK_SOURCE_KEYBOARD
} GdkInputSource;

/**
 * GdkInputMode:
 * @GDK_MODE_DISABLED: the device is disabled and will not report any events.
 * @GDK_MODE_SCREEN: the device is enabled. The device's coordinate space
 *                   maps to the entire screen.
 * @GDK_MODE_WINDOW: the device is enabled. The device's coordinate space
 *                   is mapped to a single window. The manner in which this window
 *                   is chosen is undefined, but it will typically be the same
 *                   way in which the focus window for key events is determined.
 *
 * An enumeration that describes the mode of an input device.
 */
typedef enum
{
  GDK_MODE_DISABLED,
  GDK_MODE_SCREEN,
  GDK_MODE_WINDOW
} GdkInputMode;

/**
 * GdkAxisUse:
 * @GDK_AXIS_IGNORE: the axis is ignored.
 * @GDK_AXIS_X: the axis is used as the x axis.
 * @GDK_AXIS_Y: the axis is used as the y axis.
 * @GDK_AXIS_PRESSURE: the axis is used for pressure information.
 * @GDK_AXIS_XTILT: the axis is used for x tilt information.
 * @GDK_AXIS_YTILT: the axis is used for x tilt information.
 * @GDK_AXIS_WHEEL: the axis is used for wheel information.
 * @GDK_AXIS_LAST: a constant equal to the numerically highest axis value.
 *
 * An enumeration describing the way in which a device
 * axis (valuator) maps onto the predefined valuator
 * types that GTK+ understands.
 */
typedef enum
{
  GDK_AXIS_IGNORE,
  GDK_AXIS_X,
  GDK_AXIS_Y,
  GDK_AXIS_PRESSURE,
  GDK_AXIS_XTILT,
  GDK_AXIS_YTILT,
  GDK_AXIS_WHEEL,
  GDK_AXIS_LAST
} GdkAxisUse;

/**
 * GdkDeviceType:
 * @GDK_DEVICE_TYPE_MASTER: Device is a master (or virtual) device. There will
 *                          be an associated focus indicator on the screen.
 * @GDK_DEVICE_TYPE_SLAVE: Device is a slave (or physical) device.
 * @GDK_DEVICE_TYPE_FLOATING: Device is a physical device, currently not attached to
 *                            any virtual device.
 *
 * Indicates the device type. See <link linkend="GdkDeviceManager.description">above</link>
 * for more information about the meaning of these device types.
 */
typedef enum {
  GDK_DEVICE_TYPE_MASTER,
  GDK_DEVICE_TYPE_SLAVE,
  GDK_DEVICE_TYPE_FLOATING
} GdkDeviceType;

/**
 * GdkDeviceKey:
 * @keyval: the keyval to generate when the macro button is pressed.
 *          If this is 0, no keypress will be generated.
 * @modifiers: the modifiers set for the generated key event.
 *
 * The <structname>GdkDeviceKey</structname> structure contains information
 * about the mapping of one device macro button onto a normal X key event.
 */
struct _GdkDeviceKey
{
  guint keyval;
  GdkModifierType modifiers;
};

/**
 * GdkDeviceAxis:
 * @use: specifies how the axis is used.
 * @min: the minimal value that will be reported by this axis.
 * @max: the maximal value that will be reported by this axis.
 *
 * The <structname>GdkDeviceAxis</structname> structure contains information
 * about the range and mapping of a device axis.
 */
struct _GdkDeviceAxis
{
  GdkAxisUse use;
  gdouble    min;
  gdouble    max;
};

/* We don't allocate each coordinate this big, but we use it to
 * be ANSI compliant and avoid accessing past the defined limits.
 */
#define GDK_MAX_TIMECOORD_AXES 128

/**
 * GdkTimeCoord:
 * @time: The timestamp for this event.
 * @axes: the values of the device's axes.
 *
 * The #GdkTimeCoord structure stores a single event in a motion history.
 */
struct _GdkTimeCoord
{
  guint32 time;
  gdouble axes[GDK_MAX_TIMECOORD_AXES];
};

struct _GdkDevice
{
  GObject parent_instance;

  /* All fields are read-only */
  gchar *GSEAL (name);
  GdkInputSource GSEAL (source);
  GdkInputMode GSEAL (mode);
  gboolean GSEAL (has_cursor);	     /* TRUE if a X pointer follows device motion */

  gint GSEAL (num_axes);
  GdkDeviceAxis *GSEAL (axes);

  gint GSEAL (num_keys);
  GdkDeviceKey *GSEAL (keys);

  /*< private >*/
  GdkDevicePrivate *priv;
};

GType gdk_device_get_type (void) G_GNUC_CONST;

G_CONST_RETURN gchar *gdk_device_get_name       (GdkDevice *device);
gboolean              gdk_device_get_has_cursor (GdkDevice *device);

/* Functions to configure a device */
GdkInputSource gdk_device_get_source    (GdkDevice      *device);
void           gdk_device_set_source    (GdkDevice      *device,
					 GdkInputSource  source);

GdkInputMode   gdk_device_get_mode      (GdkDevice      *device);
gboolean       gdk_device_set_mode      (GdkDevice      *device,
					 GdkInputMode    mode);

gboolean       gdk_device_get_key       (GdkDevice       *device,
                                         guint            index_,
                                         guint           *keyval,
                                         GdkModifierType *modifiers);
void           gdk_device_set_key       (GdkDevice      *device,
					 guint           index_,
					 guint           keyval,
					 GdkModifierType modifiers);

GdkAxisUse     gdk_device_get_axis_use  (GdkDevice         *device,
                                         guint              index_);
void           gdk_device_set_axis_use  (GdkDevice         *device,
                                         guint              index_,
                                         GdkAxisUse         use);


void     gdk_device_get_state    (GdkDevice         *device,
				  GdkWindow         *window,
				  gdouble           *axes,
				  GdkModifierType   *mask);
gboolean gdk_device_get_history  (GdkDevice         *device,
				  GdkWindow         *window,
				  guint32            start,
				  guint32            stop,
				  GdkTimeCoord    ***events,
				  gint              *n_events);
void     gdk_device_free_history (GdkTimeCoord     **events,
				  gint               n_events);

guint    gdk_device_get_n_axes     (GdkDevice       *device);
GList *  gdk_device_list_axes      (GdkDevice       *device);
gboolean gdk_device_get_axis_value (GdkDevice       *device,
                                    gdouble         *axes,
                                    GdkAtom          axis_label,
                                    gdouble         *value);

gboolean gdk_device_get_axis     (GdkDevice         *device,
				  gdouble           *axes,
				  GdkAxisUse         use,
				  gdouble           *value);
GdkDisplay * gdk_device_get_display (GdkDevice      *device);

GdkDevice  * gdk_device_get_associated_device (GdkDevice     *device);

GdkDeviceType gdk_device_get_device_type (GdkDevice *device);

GdkGrabStatus gdk_device_grab        (GdkDevice        *device,
                                      GdkWindow        *window,
                                      GdkGrabOwnership  grab_ownership,
                                      gboolean          owner_events,
                                      GdkEventMask      event_mask,
                                      GdkCursor        *cursor,
                                      guint32           time_);

void          gdk_device_ungrab      (GdkDevice        *device,
                                      guint32           time_);

gboolean gdk_device_grab_info_libgtk_only (GdkDisplay  *display,
                                           GdkDevice   *device,
                                           GdkWindow  **grab_window,
                                           gboolean    *owner_events);


G_END_DECLS

#endif /* __GDK_DEVICE_H__ */