Event

A #GdkEvent contains a union of all of the event types, 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 types, and can always be accessed with the following code, no matter what type of event it is: |[ GdkEvent *event; GdkEventType type;

type = event->type; ]|

To access other fields of the event, the pointer to the event can be cast to the appropriate event type, 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: |[ GdkEvent *event; gdouble x;

x = ((GdkEventButton*)event)->x; ]| or: |[ GdkEvent *event; gdouble x;

x = event->button.x; ]|

class Event {

GdkEvent* gdkEvent;

bool ownedRef;

GdkEvent* getEventStruct(bool transferOwnership);

void* getStruct();

this(GdkEvent* gdkEvent, bool ownedRef);

EventType type();

GdkEventAny* any();

GdkEventExpose* expose();

GdkEventVisibility* visibility();

GdkEventMotion* motion();

GdkEventButton* button();

GdkEventScroll* scroll();

GdkEventKey* key();

GdkEventCrossing* crossing();

GdkEventFocus* focus();

GdkEventConfigure* configure();

GdkEventProperty* property();

GdkEventSelection* selection();

GdkEventOwnerChange* ownerChange();

GdkEventProximity* proximity();

GdkEventDND* dnd();

GdkEventWindowState* windowState();

GdkEventSetting* setting();

GdkEventGrabBroken* grabBroken();

static bool isDoubleClick(GdkEventButton* eventButton, int buttonNumber);

static bool isTripleClick(GdkEventButton* eventButton, int buttonNumber);

static GType getType();

this(GdkEventType type);

static bool getAngle(Event event1, Event event2, double angle);

static bool getCenter(Event event1, Event event2, double x, double y);

static bool getDistance(Event event1, Event event2, double distance);

Event copy();

bool getAxis(GdkAxisUse axisUse, double value);

bool getButton(uint button);

bool getClickCount(uint clickCount);

bool getCoords(double xWin, double yWin);

Device getDevice();

DeviceTool getDeviceTool();

GdkEventSequence* getEventSequence();

GdkEventType getEventType();

bool getKeycode(ushort keycode);

bool getKeyval(uint keyval);

bool getPointerEmulated();

bool getRootCoords(double xRoot, double yRoot);

int getScancode();

Screen getScreen();

bool getScrollDeltas(double deltaX, double deltaY);

bool getScrollDirection(GdkScrollDirection direction);

Seat getSeat();

Device getSourceDevice();

bool getState(GdkModifierType state);

uint getTime();

Window getWindow();

bool isScrollStopEvent();

void setDevice(Device device);

void setDeviceTool(DeviceTool tool);

void setScreen(Screen screen);

void setSourceDevice(Device device);

bool triggersContextMenu();

static Event get();

static void handlerSet(GdkEventFunc func, void* data, GDestroyNotify notify);

static Event peek();

static void requestMotions(GdkEventMotion* event);

static bool pending();

static bool getShowEvents();

static void setShowEvents(bool showEvents);

static bool settingGet(string name, Value value);

}

Constructors

this this(GdkEvent* gdkEvent, bool ownedRef): Sets our main struct and passes it to the parent class.
this this(GdkEventType type): Creates a new event of the given type. All fields are set to 0.

Destructor

~this ~this(): Undocumented in source.

Members

Functions

any GdkEventAny* any()
button GdkEventButton* button()
configure GdkEventConfigure* configure(): Get a specific event.
copy Event copy(): Copies a #GdkEvent, copying or incrementing the reference count of the resources associated with it (e.g. #GdkWindow’s and strings).
crossing GdkEventCrossing* crossing()
dnd GdkEventDND* dnd()
expose GdkEventExpose* expose()
focus GdkEventFocus* focus(): Get a specific event.
free void free(): Frees a #GdkEvent, freeing or decrementing any resources associated with it. Note that this function should only be called with events returned from functions such as gdk_event_peek(), gdk_event_get(), gdk_event_copy() and gdk_event_new().
getAxis bool getAxis(GdkAxisUse axisUse, double value): Extract the axis value for a particular axis use from an event structure.
getButton bool getButton(uint button): Extract the button number from an event.
getClickCount bool getClickCount(uint clickCount): Extracts the click count from an event.
getCoords bool getCoords(double xWin, double yWin): Extract the event window relative x/y coordinates from an event.
getDevice Device getDevice(): If the event contains a “device” field, this function will return it, else it will return %NULL.
getDeviceTool DeviceTool getDeviceTool(): If the event was generated by a device that supports different tools (eg. a tablet), this function will return a #GdkDeviceTool representing the tool that caused the event. Otherwise, %NULL will be returned.
getEventSequence GdkEventSequence* getEventSequence(): If @event if of type %GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE, %GDK_TOUCH_END or %GDK_TOUCH_CANCEL, returns the #GdkEventSequence to which the event belongs. Otherwise, return %NULL.
getEventStruct GdkEvent* getEventStruct(bool transferOwnership): Get the main Gtk struct
getEventType GdkEventType getEventType(): Retrieves the type of the event.
getKeycode bool getKeycode(ushort keycode): Extracts the hardware keycode from an event.
getKeyval bool getKeyval(uint keyval): Extracts the keyval from an event.
getPointerEmulated bool getPointerEmulated(): #event: a #GdkEvent Returns whether this event is an 'emulated' pointer event (typically from a touch event), as opposed to a real one.
getRootCoords bool getRootCoords(double xRoot, double yRoot): Extract the root window relative x/y coordinates from an event.
getScancode int getScancode(): Gets the keyboard low-level scancode of a key event.
getScreen Screen getScreen(): Returns the screen for the event. The screen is typically the screen for event->any.window, but for events such as mouse events, it is the screen where the pointer was when the event occurs - that is, the screen which has the root window to which event->motion.x_root and event->motion.y_root are relative.
getScrollDeltas bool getScrollDeltas(double deltaX, double deltaY): Retrieves the scroll deltas from a #GdkEvent
getScrollDirection bool getScrollDirection(GdkScrollDirection direction): Extracts the scroll direction from an event.
getSeat Seat getSeat(): Returns the #GdkSeat this event was generated for.
getSourceDevice Device getSourceDevice(): This function returns the hardware (slave) #GdkDevice that has triggered the event, falling back to the virtual (master) device (as in gdk_event_get_device()) if the event wasn’t caused by interaction with a hardware device. This may happen for example in synthesized crossing events after a #GdkWindow updates its geometry or a grab is acquired/released.
getState bool getState(GdkModifierType state): If the event contains a “state” field, puts that field in @state. Otherwise stores an empty state (0). Returns %TRUE if there was a state field in the event. @event may be %NULL, in which case it’s treated as if the event had no state field.
getStruct void* getStruct(): the main Gtk struct as a void*
getTime uint getTime(): Returns the time stamp from @event, if there is one; otherwise returns #GDK_CURRENT_TIME. If @event is %NULL, returns #GDK_CURRENT_TIME.
getWindow Window getWindow(): Extracts the #GdkWindow associated with an event.
grabBroken GdkEventGrabBroken* grabBroken(): Get a specific event.
isScrollStopEvent bool isScrollStopEvent(): Check whether a scroll event is a stop scroll event. Scroll sequences with smooth scroll information may provide a stop scroll event once the interaction with the device finishes, e.g. by lifting a finger. This stop scroll event is the signal that a widget may trigger kinetic scrolling based on the current velocity.
key GdkEventKey* key()
motion GdkEventMotion* motion()
ownerChange GdkEventOwnerChange* ownerChange()
property GdkEventProperty* property()
proximity GdkEventProximity* proximity(): Get a specific event.
put void put(): Appends a copy of the given event onto the front of the event queue for event->any.window’s display, or the default event queue if event->any.window is %NULL. See gdk_display_put_event().
scroll GdkEventScroll* scroll()
selection GdkEventSelection* selection(): Get a specific event.
setDevice void setDevice(Device device): Sets the device for @event to @device. The event must have been allocated by GTK+, for instance, by gdk_event_copy().
setDeviceTool void setDeviceTool(DeviceTool tool): Sets the device tool for this event, should be rarely used.
setScreen void setScreen(Screen screen): Sets the screen for @event to @screen. The event must have been allocated by GTK+, for instance, by gdk_event_copy().
setSourceDevice void setSourceDevice(Device device): Sets the slave device for @event to @device.
setting GdkEventSetting* setting(): Get a specific event.
triggersContextMenu bool triggersContextMenu(): This function returns whether a #GdkEventButton should trigger a context menu, according to platform conventions. The right mouse button always triggers context menus. Additionally, if gdk_keymap_get_modifier_mask() returns a non-0 mask for %GDK_MODIFIER_INTENT_CONTEXT_MENU, then the left mouse button will also trigger a context menu if this modifier is pressed.
type EventType type(): Specifies the type of the event.
visibility GdkEventVisibility* visibility()
windowState GdkEventWindowState* windowState(): Get a specific event.

Static functions

get Event get(): Checks all open displays for a #GdkEvent to process,to be processed on, fetching events from the windowing system if necessary. See gdk_display_get_event().
getAngle bool getAngle(Event event1, Event event2, double angle): If both events contain X/Y information, this function will return %TRUE and return in @angle the relative angle from @event1 to @event2. The rotation direction for positive angles is from the positive X axis towards the positive Y axis.
getCenter bool getCenter(Event event1, Event event2, double x, double y): If both events contain X/Y information, the center of both coordinates will be returned in @x and @y.
getDistance bool getDistance(Event event1, Event event2, double distance): If both events have X/Y information, the distance between both coordinates (as in a straight line going from @event1 to @event2) will be returned.
getShowEvents bool getShowEvents(): Gets whether event debugging output is enabled.
getType GType getType()
handlerSet void handlerSet(GdkEventFunc func, void* data, GDestroyNotify notify): Sets the function to call to handle all events from GDK.
isDoubleClick bool isDoubleClick(GdkEventButton* eventButton, int buttonNumber)
isTripleClick bool isTripleClick(GdkEventButton* eventButton, int buttonNumber)
peek Event peek(): If there is an event waiting in the event queue of some open display, returns a copy of it. See gdk_display_peek_event().
pending bool pending(): Checks if any events are ready to be processed for any display.
requestMotions void requestMotions(GdkEventMotion* event): Request more motion notifies if @event is a motion notify hint event.
setShowEvents void setShowEvents(bool showEvents): Sets whether a trace of received events is output. Note that GTK+ must be compiled with debugging (that is, configured using the --enable-debug option) to use this option.
settingGet bool settingGet(string name, Value value): Obtains a desktop-wide setting, such as the double-click time, for the default screen. See gdk_screen_get_setting().

Variables

gdkEvent GdkEvent* gdkEvent;: the main Gtk struct
ownedRef bool ownedRef;: Undocumented in source.

Meta

Source

See Implementation

gdk Event classes

Event