CtkEventController

CtkEventController — Self-contained handler of series of events

Functions

Properties

CtkPropagationPhase propagation-phase Read / Write
CtkWidget * widget Read / Write / Construct Only

Types and Values

Object Hierarchy

    GObject
    ╰── CtkEventController
        ├── CtkEventControllerKey
        ├── CtkEventControllerMotion
        ├── CtkEventControllerScroll
        ├── CtkGesture
        ╰── CtkPadController

Includes

#include <ctk/ctk.h>

Description

CtkEventController is a base, low-level implementation for event controllers. Those react to a series of CdkEvents, and possibly trigger actions as a consequence of those.

Functions

ctk_event_controller_get_propagation_phase ()

CtkPropagationPhase
ctk_event_controller_get_propagation_phase
                               (CtkEventController *controller);

Gets the propagation phase at which controller handles events.

Parameters

controller

a CtkEventController

 

Returns

the propagation phase

Since: 3.14


ctk_event_controller_set_propagation_phase ()

void
ctk_event_controller_set_propagation_phase
                               (CtkEventController *controller,
                                CtkPropagationPhase phase);

Sets the propagation phase at which a controller handles events.

If phase is CTK_PHASE_NONE, no automatic event handling will be performed, but other additional gesture maintenance will. In that phase, the events can be managed by calling ctk_event_controller_handle_event().

Parameters

controller

a CtkEventController

 

phase

a propagation phase

 

Since: 3.14


ctk_event_controller_handle_event ()

gboolean
ctk_event_controller_handle_event (CtkEventController *controller,
                                   const CdkEvent *event);

Feeds an events into controller , so it can be interpreted and the controller actions triggered.

Parameters

controller

a CtkEventController

 

event

a CdkEvent

 

Returns

TRUE if the event was potentially useful to trigger the controller action

Since: 3.14


ctk_event_controller_get_widget ()

CtkWidget *
ctk_event_controller_get_widget (CtkEventController *controller);

Returns the CtkWidget this controller relates to.

Parameters

controller

a CtkEventController

 

Returns

a CtkWidget.

[transfer none]

Since: 3.14


ctk_event_controller_reset ()

void
ctk_event_controller_reset (CtkEventController *controller);

Resets the controller to a clean state. Every interaction the controller did through “handle-event” will be dropped at this point.

Parameters

controller

a CtkEventController

 

Since: 3.14

Types and Values

CtkEventController

typedef struct _CtkEventController CtkEventController;

enum CtkPropagationPhase

Describes the stage at which events are fed into a CtkEventController.

Members

CTK_PHASE_NONE

Events are not delivered automatically. Those can be manually fed through ctk_event_controller_handle_event(). This should only be used when full control about when, or whether the controller handles the event is needed.

 

CTK_PHASE_CAPTURE

Events are delivered in the capture phase. The capture phase happens before the bubble phase, runs from the toplevel down to the event widget. This option should only be used on containers that might possibly handle events before their children do.

 

CTK_PHASE_BUBBLE

Events are delivered in the bubble phase. The bubble phase happens after the capture phase, and before the default handlers are run. This phase runs from the event widget, up to the toplevel.

 

CTK_PHASE_TARGET

Events are delivered in the default widget event handlers, note that widget implementations must chain up on button, motion, touch and grab broken handlers for controllers in this phase to be run.

 

Since: 3.14

Property Details

The “propagation-phase” property

  “propagation-phase”        CtkPropagationPhase

The propagation phase at which this controller will handle events.

Owner: CtkEventController

Flags: Read / Write

Default value: CTK_PHASE_BUBBLE

Since: 3.14


The “widget” property

  “widget”                   CtkWidget *

The widget receiving the CdkEvents that the controller will handle.

Owner: CtkEventController

Flags: Read / Write / Construct Only

Since: 3.14

See Also

CtkGesture