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gtk/gdk/gdkevents.h
Matthias Clasen 3be5c09a90 Add some more documentation about GDK_SCROLL_SMOOTH
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/* 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/.
*/
#if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif
#ifndef __GDK_EVENTS_H__
#define __GDK_EVENTS_H__
#include <gdk/gdkversionmacros.h>
#include <gdk/gdkcolor.h>
#include <gdk/gdktypes.h>
#include <gdk/gdkdnd.h>
#include <gdk/gdkdevice.h>
G_BEGIN_DECLS
/**
* SECTION:event_structs
* @Short_description: Data structures specific to each type of event
* @Title: Event Structures
*
* The event structs contain data specific to each type of event in GDK.
*
* <note>
* <para>
* A common mistake is to forget to set the event mask of a widget so that
* the required events are received. See gtk_widget_set_events().
* </para>
* </note>
*/
#define GDK_TYPE_EVENT (gdk_event_get_type ())
/**
* GDK_PRIORITY_EVENTS:
*
* This is the priority that events from the X server are given in the
* <link linkend="glib-The-Main-Event-Loop">GLib Main Loop</link>.
*/
#define GDK_PRIORITY_EVENTS (G_PRIORITY_DEFAULT)
/**
* GDK_PRIORITY_REDRAW:
*
* This is the priority that the idle handler processing window updates
* is given in the
* <link linkend="glib-The-Main-Event-Loop">GLib Main Loop</link>.
*/
#define GDK_PRIORITY_REDRAW (G_PRIORITY_HIGH_IDLE + 20)
/**
* GDK_EVENT_PROPAGATE:
*
* Use this macro as the return value for continuing the propagation of
* an event handler.
*
* Since: 3.4
*/
#define GDK_EVENT_PROPAGATE (FALSE)
/**
* GDK_EVENT_STOP:
*
* Use this macro as the return value for stopping the propagation of
* an event handler.
*
* Since: 3.4
*/
#define GDK_EVENT_STOP (TRUE)
/**
* GDK_BUTTON_PRIMARY:
*
* The primary button. This is typically the left mouse button, or the
* right button in a left-handed setup.
*
* Since: 3.4
*/
#define GDK_BUTTON_PRIMARY (1)
/**
* GDK_BUTTON_MIDDLE:
*
* The middle button.
*
* Since: 3.4
*/
#define GDK_BUTTON_MIDDLE (2)
/**
* GDK_BUTTON_SECONDARY:
*
* The secondary button. This is typically the right mouse button, or the
* left button in a left-handed setup.
*
* Since: 3.4
*/
#define GDK_BUTTON_SECONDARY (3)
typedef struct _GdkEventAny GdkEventAny;
typedef struct _GdkEventExpose GdkEventExpose;
typedef struct _GdkEventVisibility GdkEventVisibility;
typedef struct _GdkEventMotion GdkEventMotion;
typedef struct _GdkEventButton GdkEventButton;
typedef struct _GdkEventTouch GdkEventTouch;
typedef struct _GdkEventScroll GdkEventScroll;
typedef struct _GdkEventKey GdkEventKey;
typedef struct _GdkEventFocus GdkEventFocus;
typedef struct _GdkEventCrossing GdkEventCrossing;
typedef struct _GdkEventConfigure GdkEventConfigure;
typedef struct _GdkEventProperty GdkEventProperty;
typedef struct _GdkEventSelection GdkEventSelection;
typedef struct _GdkEventOwnerChange GdkEventOwnerChange;
typedef struct _GdkEventProximity GdkEventProximity;
typedef struct _GdkEventDND GdkEventDND;
typedef struct _GdkEventWindowState GdkEventWindowState;
typedef struct _GdkEventSetting GdkEventSetting;
typedef struct _GdkEventGrabBroken GdkEventGrabBroken;
typedef struct _GdkEventSequence GdkEventSequence;
typedef union _GdkEvent GdkEvent;
/**
* GdkEventFunc:
* @event: the #GdkEvent to process.
* @data: (closure): user data set when the event handler was installed with
* gdk_event_handler_set().
*
* Specifies the type of function passed to gdk_event_handler_set() to
* handle all GDK events.
*/
typedef void (*GdkEventFunc) (GdkEvent *event,
gpointer data);
/* Event filtering */
/**
* GdkXEvent:
*
* Used to represent native events (<type>XEvent</type>s for the X11
* backend, <type>MSG</type>s for Win32).
*/
typedef void GdkXEvent; /* Can be cast to window system specific
* even type, XEvent on X11, MSG on Win32.
*/
/**
* GdkFilterReturn:
* @GDK_FILTER_CONTINUE: event not handled, continue processing.
* @GDK_FILTER_TRANSLATE: native event translated into a GDK event and stored
* in the <literal>event</literal> structure that was passed in.
* @GDK_FILTER_REMOVE: event handled, terminate processing.
*
* Specifies the result of applying a #GdkFilterFunc to a native event.
*/
typedef enum {
GDK_FILTER_CONTINUE, /* Event not handled, continue processesing */
GDK_FILTER_TRANSLATE, /* Native event translated into a GDK event and
stored in the "event" structure that was
passed in */
GDK_FILTER_REMOVE /* Terminate processing, removing event */
} GdkFilterReturn;
/**
* GdkFilterFunc:
* @xevent: the native event to filter.
* @event: the GDK event to which the X event will be translated.
* @data: user data set when the filter was installed.
*
* Specifies the type of function used to filter native events before they are
* converted to GDK events.
*
* When a filter is called, @event is unpopulated, except for
* <literal>event->window</literal>. The filter may translate the native
* event to a GDK event and store the result in @event, or handle it without
* translation. If the filter translates the event and processing should
* continue, it should return %GDK_FILTER_TRANSLATE.
*
* Returns: a #GdkFilterReturn value.
*/
typedef GdkFilterReturn (*GdkFilterFunc) (GdkXEvent *xevent,
GdkEvent *event,
gpointer data);
/**
* GdkEventType:
* @GDK_NOTHING: a special code to indicate a null event.
* @GDK_DELETE: the window manager has requested that the toplevel window be
* hidden or destroyed, usually when the user clicks on a special icon in the
* title bar.
* @GDK_DESTROY: the window has been destroyed.
* @GDK_EXPOSE: all or part of the window has become visible and needs to be
* redrawn.
* @GDK_MOTION_NOTIFY: the pointer (usually a mouse) has moved.
* @GDK_BUTTON_PRESS: a mouse button has been pressed.
* @GDK_2BUTTON_PRESS: a mouse button has been double-clicked (clicked twice
* within a short period of time). Note that each click also generates a
* %GDK_BUTTON_PRESS event.
* @GDK_3BUTTON_PRESS: a mouse button has been clicked 3 times in a short period
* of time. Note that each click also generates a %GDK_BUTTON_PRESS event.
* @GDK_BUTTON_RELEASE: a mouse button has been released.
* @GDK_KEY_PRESS: a key has been pressed.
* @GDK_KEY_RELEASE: a key has been released.
* @GDK_ENTER_NOTIFY: the pointer has entered the window.
* @GDK_LEAVE_NOTIFY: the pointer has left the window.
* @GDK_FOCUS_CHANGE: the keyboard focus has entered or left the window.
* @GDK_CONFIGURE: the size, position or stacking order of the window has changed.
* Note that GTK+ discards these events for %GDK_WINDOW_CHILD windows.
* @GDK_MAP: the window has been mapped.
* @GDK_UNMAP: the window has been unmapped.
* @GDK_PROPERTY_NOTIFY: a property on the window has been changed or deleted.
* @GDK_SELECTION_CLEAR: the application has lost ownership of a selection.
* @GDK_SELECTION_REQUEST: another application has requested a selection.
* @GDK_SELECTION_NOTIFY: a selection has been received.
* @GDK_PROXIMITY_IN: an input device has moved into contact with a sensing
* surface (e.g. a touchscreen or graphics tablet).
* @GDK_PROXIMITY_OUT: an input device has moved out of contact with a sensing
* surface.
* @GDK_DRAG_ENTER: the mouse has entered the window while a drag is in progress.
* @GDK_DRAG_LEAVE: the mouse has left the window while a drag is in progress.
* @GDK_DRAG_MOTION: the mouse has moved in the window while a drag is in
* progress.
* @GDK_DRAG_STATUS: the status of the drag operation initiated by the window
* has changed.
* @GDK_DROP_START: a drop operation onto the window has started.
* @GDK_DROP_FINISHED: the drop operation initiated by the window has completed.
* @GDK_CLIENT_EVENT: a message has been received from another application.
* @GDK_VISIBILITY_NOTIFY: the window visibility status has changed.
* @GDK_SCROLL: the scroll wheel was turned
* @GDK_WINDOW_STATE: the state of a window has changed. See #GdkWindowState
* for the possible window states
* @GDK_SETTING: a setting has been modified.
* @GDK_OWNER_CHANGE: the owner of a selection has changed. This event type
* was added in 2.6
* @GDK_GRAB_BROKEN: a pointer or keyboard grab was broken. This event type
* was added in 2.8.
* @GDK_DAMAGE: the content of the window has been changed. This event type
* was added in 2.14.
* @GDK_TOUCH_BEGIN: A new touch event sequence has just started. This event
* type was added in 3.4.
* @GDK_TOUCH_UPDATE: A touch event sequence has been updated. This event type
* was added in 3.4.
* @GDK_TOUCH_END: A touch event sequence has finished. This event type
* was added in 3.4.
* @GDK_TOUCH_CANCEL: A touch event sequence has been canceled. This event type
* was added in 3.4.
* @GDK_EVENT_LAST: marks the end of the GdkEventType enumeration. Added in 2.18
*
* Specifies the type of the event.
*
* Do not confuse these events with the signals that GTK+ widgets emit.
* Although many of these events result in corresponding signals being emitted,
* the events are often transformed or filtered along the way.
*/
typedef enum
{
GDK_NOTHING = -1,
GDK_DELETE = 0,
GDK_DESTROY = 1,
GDK_EXPOSE = 2,
GDK_MOTION_NOTIFY = 3,
GDK_BUTTON_PRESS = 4,
GDK_2BUTTON_PRESS = 5,
GDK_3BUTTON_PRESS = 6,
GDK_BUTTON_RELEASE = 7,
GDK_KEY_PRESS = 8,
GDK_KEY_RELEASE = 9,
GDK_ENTER_NOTIFY = 10,
GDK_LEAVE_NOTIFY = 11,
GDK_FOCUS_CHANGE = 12,
GDK_CONFIGURE = 13,
GDK_MAP = 14,
GDK_UNMAP = 15,
GDK_PROPERTY_NOTIFY = 16,
GDK_SELECTION_CLEAR = 17,
GDK_SELECTION_REQUEST = 18,
GDK_SELECTION_NOTIFY = 19,
GDK_PROXIMITY_IN = 20,
GDK_PROXIMITY_OUT = 21,
GDK_DRAG_ENTER = 22,
GDK_DRAG_LEAVE = 23,
GDK_DRAG_MOTION = 24,
GDK_DRAG_STATUS = 25,
GDK_DROP_START = 26,
GDK_DROP_FINISHED = 27,
GDK_CLIENT_EVENT = 28,
GDK_VISIBILITY_NOTIFY = 29,
GDK_SCROLL = 31,
GDK_WINDOW_STATE = 32,
GDK_SETTING = 33,
GDK_OWNER_CHANGE = 34,
GDK_GRAB_BROKEN = 35,
GDK_DAMAGE = 36,
GDK_TOUCH_BEGIN = 37,
GDK_TOUCH_UPDATE = 38,
GDK_TOUCH_END = 39,
GDK_TOUCH_CANCEL = 40,
GDK_EVENT_LAST /* helper variable for decls */
} GdkEventType;
/**
* GdkVisibilityState:
* @GDK_VISIBILITY_UNOBSCURED: the window is completely visible.
* @GDK_VISIBILITY_PARTIAL: the window is partially visible.
* @GDK_VISIBILITY_FULLY_OBSCURED: the window is not visible at all.
*
* Specifies the visiblity status of a window for a #GdkEventVisibility.
*/
typedef enum
{
GDK_VISIBILITY_UNOBSCURED,
GDK_VISIBILITY_PARTIAL,
GDK_VISIBILITY_FULLY_OBSCURED
} GdkVisibilityState;
/**
* GdkScrollDirection:
* @GDK_SCROLL_UP: the window is scrolled up.
* @GDK_SCROLL_DOWN: the window is scrolled down.
* @GDK_SCROLL_LEFT: the window is scrolled to the left.
* @GDK_SCROLL_RIGHT: the window is scrolled to the right.
* @GDK_SCROLL_SMOOTH: the scrolling is determined by the delta values
* in #GdkEventScroll. See gdk_event_get_scroll_deltas().
*
* Specifies the direction for #GdkEventScroll.
*/
typedef enum
{
GDK_SCROLL_UP,
GDK_SCROLL_DOWN,
GDK_SCROLL_LEFT,
GDK_SCROLL_RIGHT,
GDK_SCROLL_SMOOTH
} GdkScrollDirection;
/**
* GdkNotifyType:
* @GDK_NOTIFY_ANCESTOR: the window is entered from an ancestor or
* left towards an ancestor.
* @GDK_NOTIFY_VIRTUAL: the pointer moves between an ancestor and an
* inferior of the window.
* @GDK_NOTIFY_INFERIOR: the window is entered from an inferior or
* left towards an inferior.
* @GDK_NOTIFY_NONLINEAR: the window is entered from or left towards
* a window which is neither an ancestor nor an inferior.
* @GDK_NOTIFY_NONLINEAR_VIRTUAL: the pointer moves between two windows
* which are not ancestors of each other and the window is part of
* the ancestor chain between one of these windows and their least
* common ancestor.
* @GDK_NOTIFY_UNKNOWN: an unknown type of enter/leave event occurred.
*
* Specifies the kind of crossing for #GdkEventCrossing.
*
* See the X11 protocol specification of <type>LeaveNotify</type> for
* full details of crossing event generation.
*/
typedef enum
{
GDK_NOTIFY_ANCESTOR = 0,
GDK_NOTIFY_VIRTUAL = 1,
GDK_NOTIFY_INFERIOR = 2,
GDK_NOTIFY_NONLINEAR = 3,
GDK_NOTIFY_NONLINEAR_VIRTUAL = 4,
GDK_NOTIFY_UNKNOWN = 5
} GdkNotifyType;
/**
* GdkCrossingMode:
* @GDK_CROSSING_NORMAL: crossing because of pointer motion.
* @GDK_CROSSING_GRAB: crossing because a grab is activated.
* @GDK_CROSSING_UNGRAB: crossing because a grab is deactivated.
* @GDK_CROSSING_GTK_GRAB: crossing because a GTK+ grab is activated.
* @GDK_CROSSING_GTK_UNGRAB: crossing because a GTK+ grab is deactivated.
* @GDK_CROSSING_STATE_CHANGED: crossing because a GTK+ widget changed
* state (e.g. sensitivity).
* @GDK_CROSSING_TOUCH_BEGIN: crossing because a touch sequence has begun,
* this event is synthetic as the pointer might have not left the window.
* @GDK_CROSSING_TOUCH_END: crossing because a touch sequence has ended,
* this event is synthetic as the pointer might have not left the window.
* @GDK_CROSSING_DEVICE_SWITCH: crossing because of a device switch (i.e.
* a mouse taking control of the pointer after a touch device), this event
* is synthetic as the pointer didn't leave the window.
*
* Specifies the crossing mode for #GdkEventCrossing.
*/
typedef enum
{
GDK_CROSSING_NORMAL,
GDK_CROSSING_GRAB,
GDK_CROSSING_UNGRAB,
GDK_CROSSING_GTK_GRAB,
GDK_CROSSING_GTK_UNGRAB,
GDK_CROSSING_STATE_CHANGED,
GDK_CROSSING_TOUCH_BEGIN,
GDK_CROSSING_TOUCH_END,
GDK_CROSSING_DEVICE_SWITCH
} GdkCrossingMode;
/**
* GdkPropertyState:
* @GDK_PROPERTY_NEW_VALUE: the property value was changed.
* @GDK_PROPERTY_DELETE: the property was deleted.
*
* Specifies the type of a property change for a #GdkEventProperty.
*/
typedef enum
{
GDK_PROPERTY_NEW_VALUE,
GDK_PROPERTY_DELETE
} GdkPropertyState;
/**
* GdkWindowState:
* @GDK_WINDOW_STATE_WITHDRAWN: the window is not shown.
* @GDK_WINDOW_STATE_ICONIFIED: the window is minimized.
* @GDK_WINDOW_STATE_MAXIMIZED: the window is maximized.
* @GDK_WINDOW_STATE_STICKY: the window is sticky.
* @GDK_WINDOW_STATE_FULLSCREEN: the window is maximized without
* decorations.
* @GDK_WINDOW_STATE_ABOVE: the window is kept above other windows.
* @GDK_WINDOW_STATE_BELOW: the window is kept below other windows.
* @GDK_WINDOW_STATE_FOCUSED: the window is presented as focused (with active decorations).
*
* Specifies the state of a toplevel window.
*/
typedef enum
{
GDK_WINDOW_STATE_WITHDRAWN = 1 << 0,
GDK_WINDOW_STATE_ICONIFIED = 1 << 1,
GDK_WINDOW_STATE_MAXIMIZED = 1 << 2,
GDK_WINDOW_STATE_STICKY = 1 << 3,
GDK_WINDOW_STATE_FULLSCREEN = 1 << 4,
GDK_WINDOW_STATE_ABOVE = 1 << 5,
GDK_WINDOW_STATE_BELOW = 1 << 6,
GDK_WINDOW_STATE_FOCUSED = 1 << 7
} GdkWindowState;
/**
* GdkSettingAction:
* @GDK_SETTING_ACTION_NEW: a setting was added.
* @GDK_SETTING_ACTION_CHANGED: a setting was changed.
* @GDK_SETTING_ACTION_DELETED: a setting was deleted.
*
* Specifies the kind of modification applied to a setting in a
* #GdkEventSetting.
*/
typedef enum
{
GDK_SETTING_ACTION_NEW,
GDK_SETTING_ACTION_CHANGED,
GDK_SETTING_ACTION_DELETED
} GdkSettingAction;
/**
* GdkOwnerChange:
* @GDK_OWNER_CHANGE_NEW_OWNER: some other app claimed the ownership
* @GDK_OWNER_CHANGE_DESTROY: the window was destroyed
* @GDK_OWNER_CHANGE_CLOSE: the client was closed
*
* Specifies why a selection ownership was changed.
*/
typedef enum
{
GDK_OWNER_CHANGE_NEW_OWNER,
GDK_OWNER_CHANGE_DESTROY,
GDK_OWNER_CHANGE_CLOSE
} GdkOwnerChange;
/**
* GdkEventAny:
* @type: the type of the event.
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
*
* Contains the fields which are common to all event structs.
* Any event pointer can safely be cast to a pointer to a #GdkEventAny to
* access these fields.
*/
struct _GdkEventAny
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
};
/**
* GdkEventExpose:
* @type: the type of the event (%GDK_EXPOSE or %GDK_DAMAGE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @area: bounding box of @region.
* @region: the region that needs to be redrawn.
* @count: the number of contiguous %GDK_EXPOSE events following this one.
* The only use for this is "exposure compression", i.e. handling all
* contiguous %GDK_EXPOSE events in one go, though GDK performs some
* exposure compression so this is not normally needed.
*
* Generated when all or part of a window becomes visible and needs to be
* redrawn.
*/
struct _GdkEventExpose
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkRectangle area;
cairo_region_t *region;
gint count; /* If non-zero, how many more events follow. */
};
/**
* GdkEventVisibility:
* @type: the type of the event (%GDK_VISIBILITY_NOTIFY).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @state: the new visibility state (%GDK_VISIBILITY_FULLY_OBSCURED,
* %GDK_VISIBILITY_PARTIAL or %GDK_VISIBILITY_UNOBSCURED).
*
* Generated when the window visibility status has changed.
*/
struct _GdkEventVisibility
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkVisibilityState state;
};
/**
* GdkEventMotion:
* @type: the type of the event.
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window.
* @y: the y coordinate of the pointer relative to the window.
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType.
* @is_hint: set to 1 if this event is just a hint, see the
* %GDK_POINTER_MOTION_HINT_MASK value of #GdkEventMask.
* @device: the device where the event originated.
* @x_root: the x coordinate of the pointer relative to the root of the
* screen.
* @y_root: the y coordinate of the pointer relative to the root of the
* screen.
*
* Generated when the pointer moves.
*/
struct _GdkEventMotion
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
gdouble x;
gdouble y;
gdouble *axes;
guint state;
gint16 is_hint;
GdkDevice *device;
gdouble x_root, y_root;
};
/**
* GdkEventButton:
* @type: the type of the event (%GDK_BUTTON_PRESS, %GDK_2BUTTON_PRESS,
* %GDK_3BUTTON_PRESS or %GDK_BUTTON_RELEASE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window.
* @y: the y coordinate of the pointer relative to the window.
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType.
* @button: the button which was pressed or released, numbered from 1 to 5.
* Normally button 1 is the left mouse button, 2 is the middle button,
* and 3 is the right button. On 2-button mice, the middle button can
* often be simulated by pressing both mouse buttons together.
* @device: the device where the event originated.
* @x_root: the x coordinate of the pointer relative to the root of the
* screen.
* @y_root: the y coordinate of the pointer relative to the root of the
* screen.
*
* Used for button press and button release events. The
* @type field will be one of %GDK_BUTTON_PRESS,
* %GDK_2BUTTON_PRESS, %GDK_3BUTTON_PRESS or %GDK_BUTTON_RELEASE,
*
* Double and triple-clicks result in a sequence of events being received.
* For double-clicks the order of events will be:
* <orderedlist>
* <listitem><para>%GDK_BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_BUTTON_RELEASE</para></listitem>
* <listitem><para>%GDK_BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_2BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_BUTTON_RELEASE</para></listitem>
* </orderedlist>
* Note that the first click is received just like a normal
* button press, while the second click results in a %GDK_2BUTTON_PRESS
* being received just after the %GDK_BUTTON_PRESS.
*
* Triple-clicks are very similar to double-clicks, except that
* %GDK_3BUTTON_PRESS is inserted after the third click. The order of the
* events is:
* <orderedlist>
* <listitem><para>%GDK_BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_BUTTON_RELEASE</para></listitem>
* <listitem><para>%GDK_BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_2BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_BUTTON_RELEASE</para></listitem>
* <listitem><para>%GDK_BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_3BUTTON_PRESS</para></listitem>
* <listitem><para>%GDK_BUTTON_RELEASE</para></listitem>
* </orderedlist>
*
* For a double click to occur, the second button press must occur within
* 1/4 of a second of the first. For a triple click to occur, the third
* button press must also occur within 1/2 second of the first button press.
*/
struct _GdkEventButton
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
gdouble x;
gdouble y;
gdouble *axes;
guint state;
guint button;
GdkDevice *device;
gdouble x_root, y_root;
};
/**
* GdkEventTouch:
* @type: the type of the event (%GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
* %GDK_TOUCH_END, %GDK_TOUCH_CANCEL)
* @window: the window which received the event
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>)
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window
* @y: the y coordinate of the pointer relative to the window
* @axes: @x, @y translated to the axes of @device, or %NULL if @device is
* the mouse
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType
* @sequence: the event sequence that the event belongs to
* @emulating_pointer: whether the event should be used for emulating
* pointer event
* @device: the device where the event originated
* @x_root: the x coordinate of the pointer relative to the root of the
* screen
* @y_root: the y coordinate of the pointer relative to the root of the
* screen
*
* Used for touch events.
* @type field will be one of %GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
* %GDK_TOUCH_END or %GDK_TOUCH_CANCEL.
*
* Touch events are grouped into sequences by means of the @sequence
* field, which can also be obtained with gdk_event_get_event_sequence().
* Each sequence begins with a %GDK_TOUCH_BEGIN event, followed by
* any number of %GDK_TOUCH_UPDATE events, and ends with a %GDK_TOUCH_END
* (or %GDK_TOUCH_CANCEL) event. With multitouch devices, there may be
* several active sequences at the same time.
*/
struct _GdkEventTouch
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
gdouble x;
gdouble y;
gdouble *axes;
guint state;
GdkEventSequence *sequence;
gboolean emulating_pointer;
GdkDevice *device;
gdouble x_root, y_root;
};
/**
* GdkEventScroll:
* @type: the type of the event (%GDK_SCROLL).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window.
* @y: the y coordinate of the pointer relative to the window.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType.
* @direction: the direction to scroll to (one of %GDK_SCROLL_UP,
* %GDK_SCROLL_DOWN, %GDK_SCROLL_LEFT, %GDK_SCROLL_RIGHT or
* %GDK_SCROLL_SMOOTH).
* @device: the device where the event originated.
* @x_root: the x coordinate of the pointer relative to the root of the
* screen.
* @y_root: the y coordinate of the pointer relative to the root of the
* screen.
*
* Generated from button presses for the buttons 4 to 7. Wheel mice are
* usually configured to generate button press events for buttons 4 and 5
* when the wheel is turned.
*
* Some GDK backends can also generate 'smooth' scroll events, which
* can be recognized by the %GDK_SCROLL_SMOOTH scroll direction. For
* these, the scroll deltas can be obtained with
* gdk_event_get_scroll_deltas().
*/
struct _GdkEventScroll
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
gdouble x;
gdouble y;
guint state;
GdkScrollDirection direction;
GdkDevice *device;
gdouble x_root, y_root;
gdouble delta_x;
gdouble delta_y;
};
/**
* GdkEventKey:
* @type: the type of the event (%GDK_KEY_PRESS or %GDK_KEY_RELEASE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @time: the time of the event in milliseconds.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType.
* @keyval: the key that was pressed or released. See the
* <filename>&lt;gdk/gdkkeysyms.h&gt;</filename> header file for a
* complete list of GDK key codes.
* @length: the length of @string.
* @string: a string containing the an approximation of the text that
* would result from this keypress. The only correct way to handle text
* input of text is using input methods (see #GtkIMContext), so this
* field is deprecated and should never be used.
* (gdk_unicode_to_keyval() provides a non-deprecated way of getting
* an approximate translation for a key.) The string is encoded in the
* encoding of the current locale (Note: this for backwards compatibility:
* strings in GTK+ and GDK are typically in UTF-8.) and NUL-terminated.
* In some cases, the translation of the key code will be a single
* NUL byte, in which case looking at @length is necessary to distinguish
* it from the an empty translation.
* @hardware_keycode: the raw code of the key that was pressed or released.
* @group: the keyboard group.
* @is_modifier: a flag that indicates if @hardware_keycode is mapped to a
* modifier. Since 2.10
*
* Describes a key press or key release event.
*/
struct _GdkEventKey
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
guint state;
guint keyval;
gint length;
gchar *string;
guint16 hardware_keycode;
guint8 group;
guint is_modifier : 1;
};
/**
* GdkEventCrossing:
* @type: the type of the event (%GDK_ENTER_NOTIFY or %GDK_LEAVE_NOTIFY).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @subwindow: the window that was entered or left.
* @time: the time of the event in milliseconds.
* @x: the x coordinate of the pointer relative to the window.
* @y: the y coordinate of the pointer relative to the window.
* @x_root: the x coordinate of the pointer relative to the root of the screen.
* @y_root: the y coordinate of the pointer relative to the root of the screen.
* @mode: the crossing mode (%GDK_CROSSING_NORMAL, %GDK_CROSSING_GRAB,
* %GDK_CROSSING_UNGRAB, %GDK_CROSSING_GTK_GRAB, %GDK_CROSSING_GTK_UNGRAB or
* %GDK_CROSSING_STATE_CHANGED). %GDK_CROSSING_GTK_GRAB, %GDK_CROSSING_GTK_UNGRAB,
* and %GDK_CROSSING_STATE_CHANGED were added in 2.14 and are always synthesized,
* never native.
* @detail: the kind of crossing that happened (%GDK_NOTIFY_INFERIOR,
* %GDK_NOTIFY_ANCESTOR, %GDK_NOTIFY_VIRTUAL, %GDK_NOTIFY_NONLINEAR or
* %GDK_NOTIFY_NONLINEAR_VIRTUAL).
* @focus: %TRUE if @window is the focus window or an inferior.
* @state: (type GdkModifierType): a bit-mask representing the state of
* the modifier keys (e.g. Control, Shift and Alt) and the pointer
* buttons. See #GdkModifierType.
*
* Generated when the pointer enters or leaves a window.
*/
struct _GdkEventCrossing
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkWindow *subwindow;
guint32 time;
gdouble x;
gdouble y;
gdouble x_root;
gdouble y_root;
GdkCrossingMode mode;
GdkNotifyType detail;
gboolean focus;
guint state;
};
/**
* GdkEventFocus:
* @type: the type of the event (%GDK_FOCUS_CHANGE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @in: %TRUE if the window has gained the keyboard focus, %FALSE if
* it has lost the focus.
*
* Describes a change of keyboard focus.
*/
struct _GdkEventFocus
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
gint16 in;
};
/**
* GdkEventConfigure:
* @type: the type of the event (%GDK_CONFIGURE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @x: the new x coordinate of the window, relative to its parent.
* @y: the new y coordinate of the window, relative to its parent.
* @width: the new width of the window.
* @height: the new height of the window.
*
* Generated when a window size or position has changed.
*/
struct _GdkEventConfigure
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
gint x, y;
gint width;
gint height;
};
/**
* GdkEventProperty:
* @type: the type of the event (%GDK_PROPERTY_NOTIFY).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @atom: the property that was changed.
* @time: the time of the event in milliseconds.
* @state: whether the property was changed (%GDK_PROPERTY_NEW_VALUE) or
* deleted (%GDK_PROPERTY_DELETE).
*
* Describes a property change on a window.
*/
struct _GdkEventProperty
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkAtom atom;
guint32 time;
guint state;
};
/**
* GdkEventSelection:
* @type: the type of the event (%GDK_SELECTION_CLEAR,
* %GDK_SELECTION_NOTIFY or %GDK_SELECTION_REQUEST).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @selection: the selection.
* @target: the target to which the selection should be converted.
* @property: the property in which to place the result of the conversion.
* @time: the time of the event in milliseconds.
* @requestor: the window on which to place @property or %NULL if none.
*
* Generated when a selection is requested or ownership of a selection
* is taken over by another client application.
*/
struct _GdkEventSelection
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkAtom selection;
GdkAtom target;
GdkAtom property;
guint32 time;
GdkWindow *requestor;
};
/**
* GdkEventOwnerChange:
* @type: the type of the event (%GDK_OWNER_CHANGE).
* @window: the window which received the event
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>)
* @owner: the new owner of the selection, or %NULL if there is none
* @reason: the reason for the ownership change as a #GdkOwnerChange value
* @selection: the atom identifying the selection
* @time: the timestamp of the event
* @selection_time: the time at which the selection ownership was taken
* over
*
* Generated when the owner of a selection changes. On X11, this
* information is only available if the X server supports the XFIXES
* extension.
*
* Since: 2.6
*/
struct _GdkEventOwnerChange
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkWindow *owner;
GdkOwnerChange reason;
GdkAtom selection;
guint32 time;
guint32 selection_time;
};
/**
* GdkEventProximity:
* @type: the type of the event (%GDK_PROXIMITY_IN or %GDK_PROXIMITY_OUT).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using <function>XSendEvent</function>).
* @time: the time of the event in milliseconds.
* @device: the device where the event originated.
*
* Proximity events are generated when using GDK's wrapper for the
* XInput extension. The XInput extension is an add-on for standard X
* that allows you to use nonstandard devices such as graphics tablets.
* A proximity event indicates that the stylus has moved in or out of
* contact with the tablet, or perhaps that the user's finger has moved
* in or out of contact with a touch screen.
*
* This event type will be used pretty rarely. It only is important for
* XInput aware programs that are drawing their own cursor.
*/
struct _GdkEventProximity
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
guint32 time;
GdkDevice *device;
};
/**
* GdkEventSetting:
* @type: the type of the event (%GDK_SETTING).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @action: what happened to the setting (%GDK_SETTING_ACTION_NEW,
* %GDK_SETTING_ACTION_CHANGED or %GDK_SETTING_ACTION_DELETED).
* @name: the name of the setting.
*
* Generated when a setting is modified.
*/
struct _GdkEventSetting
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkSettingAction action;
char *name;
};
/**
* GdkEventWindowState:
* @type: the type of the event (%GDK_WINDOW_STATE).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @changed_mask: mask specifying what flags have changed.
* @new_window_state: the new window state, a combination of
* #GdkWindowState bits.
*
* Generated when the state of a toplevel window changes.
*/
struct _GdkEventWindowState
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkWindowState changed_mask;
GdkWindowState new_window_state;
};
/**
* GdkEventGrabBroken:
* @type: the type of the event (%GDK_GRAB_BROKEN)
* @window: the window which received the event, i.e. the window
* that previously owned the grab
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @keyboard: %TRUE if a keyboard grab was broken, %FALSE if a pointer
* grab was broken
* @implicit: %TRUE if the broken grab was implicit
* @grab_window: If this event is caused by another grab in the same
* application, @grab_window contains the new grab window. Otherwise
* @grab_window is %NULL.
*
* Generated when a pointer or keyboard grab is broken. On X11, this happens
* when the grab window becomes unviewable (i.e. it or one of its ancestors
* is unmapped), or if the same application grabs the pointer or keyboard
* again. Note that implicit grabs (which are initiated by button presses)
* can also cause #GdkEventGrabBroken events.
*
* Since: 2.8
*/
struct _GdkEventGrabBroken {
GdkEventType type;
GdkWindow *window;
gint8 send_event;
gboolean keyboard;
gboolean implicit;
GdkWindow *grab_window;
};
/**
* GdkEventDND:
* @type: the type of the event (%GDK_DRAG_ENTER, %GDK_DRAG_LEAVE,
* %GDK_DRAG_MOTION, %GDK_DRAG_STATUS, %GDK_DROP_START or
* %GDK_DROP_FINISHED).
* @window: the window which received the event.
* @send_event: %TRUE if the event was sent explicitly (e.g. using
* <function>XSendEvent</function>).
* @context: the #GdkDragContext for the current DND operation.
* @time: the time of the event in milliseconds.
* @x_root: the x coordinate of the pointer relative to the root of the
* screen, only set for %GDK_DRAG_MOTION and %GDK_DROP_START.
* @y_root: the y coordinate of the pointer relative to the root of the
* screen, only set for %GDK_DRAG_MOTION and %GDK_DROP_START.
*
* Generated during DND operations.
*/
struct _GdkEventDND {
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkDragContext *context;
guint32 time;
gshort x_root, y_root;
};
/**
* GdkEvent:
*
* The #GdkEvent struct contains a union of all of the event structs,
* and allows access to the data fields in a number of ways.
*
* The event type is always the first field in all of the event structs, and
* can always be accessed with the following code, no matter what type of
* event it is:
* <informalexample>
* <programlisting>
* GdkEvent *event;
* GdkEventType type;
*
* type = event->type;
* </programlisting>
* </informalexample>
*
* To access other fields of the event structs, the pointer to the event
* can be cast to the appropriate event struct pointer, or the union member
* name can be used. For example if the event type is %GDK_BUTTON_PRESS
* then the x coordinate of the button press can be accessed with:
* <informalexample>
* <programlisting>
* GdkEvent *event;
* gdouble x;
*
* x = ((GdkEventButton*)event)->x;
* </programlisting>
* </informalexample>
* or:
* <informalexample>
* <programlisting>
* GdkEvent *event;
* gdouble x;
*
* x = event->button.x;
* </programlisting>
* </informalexample>
*/
union _GdkEvent
{
GdkEventType type;
GdkEventAny any;
GdkEventExpose expose;
GdkEventVisibility visibility;
GdkEventMotion motion;
GdkEventButton button;
GdkEventTouch touch;
GdkEventScroll scroll;
GdkEventKey key;
GdkEventCrossing crossing;
GdkEventFocus focus_change;
GdkEventConfigure configure;
GdkEventProperty property;
GdkEventSelection selection;
GdkEventOwnerChange owner_change;
GdkEventProximity proximity;
GdkEventDND dnd;
GdkEventWindowState window_state;
GdkEventSetting setting;
GdkEventGrabBroken grab_broken;
};
GType gdk_event_get_type (void) G_GNUC_CONST;
gboolean gdk_events_pending (void);
GdkEvent* gdk_event_get (void);
GdkEvent* gdk_event_peek (void);
void gdk_event_put (const GdkEvent *event);
GdkEvent* gdk_event_new (GdkEventType type);
GdkEvent* gdk_event_copy (const GdkEvent *event);
void gdk_event_free (GdkEvent *event);
guint32 gdk_event_get_time (const GdkEvent *event);
gboolean gdk_event_get_state (const GdkEvent *event,
GdkModifierType *state);
gboolean gdk_event_get_coords (const GdkEvent *event,
gdouble *x_win,
gdouble *y_win);
gboolean gdk_event_get_root_coords (const GdkEvent *event,
gdouble *x_root,
gdouble *y_root);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_button (const GdkEvent *event,
guint *button);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_click_count (const GdkEvent *event,
guint *click_count);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_keyval (const GdkEvent *event,
guint *keyval);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_keycode (const GdkEvent *event,
guint16 *keycode);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_scroll_direction (const GdkEvent *event,
GdkScrollDirection *direction);
GDK_AVAILABLE_IN_3_4
gboolean gdk_event_get_scroll_deltas (const GdkEvent *event,
gdouble *delta_x,
gdouble *delta_y);
gboolean gdk_event_get_axis (const GdkEvent *event,
GdkAxisUse axis_use,
gdouble *value);
void gdk_event_set_device (GdkEvent *event,
GdkDevice *device);
GdkDevice* gdk_event_get_device (const GdkEvent *event);
void gdk_event_set_source_device (GdkEvent *event,
GdkDevice *device);
GdkDevice* gdk_event_get_source_device (const GdkEvent *event);
void gdk_event_request_motions (const GdkEventMotion *event);
GDK_AVAILABLE_IN_3_4
gboolean gdk_event_triggers_context_menu (const GdkEvent *event);
gboolean gdk_events_get_distance (GdkEvent *event1,
GdkEvent *event2,
gdouble *distance);
gboolean gdk_events_get_angle (GdkEvent *event1,
GdkEvent *event2,
gdouble *angle);
gboolean gdk_events_get_center (GdkEvent *event1,
GdkEvent *event2,
gdouble *x,
gdouble *y);
void gdk_event_handler_set (GdkEventFunc func,
gpointer data,
GDestroyNotify notify);
void gdk_event_set_screen (GdkEvent *event,
GdkScreen *screen);
GdkScreen *gdk_event_get_screen (const GdkEvent *event);
GDK_AVAILABLE_IN_3_4
GdkEventSequence *gdk_event_get_event_sequence (const GdkEvent *event);
void gdk_set_show_events (gboolean show_events);
gboolean gdk_get_show_events (void);
#ifndef GDK_MULTIHEAD_SAFE
gboolean gdk_setting_get (const gchar *name,
GValue *value);
#endif /* GDK_MULTIHEAD_SAFE */
G_END_DECLS
#endif /* __GDK_EVENTS_H__ */
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