Definition

Represents the base class for classes that contain event data, and provides a value to use for events that do not include event data.

Remarks: This class serves as the base class for all classes that represent event data. For example, the xtd::forms::form_closing_event_args class derives from event_args and is used to hold information when form closing. To create a custom event data class, create a class that derives from the event_args class and provide the properties to store the necessary data. The name of your custom event data class should end with _event_args.; To pass an object that does not contain any data, use the empty field.

Examples:: animation.cpp, application_enable_dark_mode.cpp, application_enable_light_mode.cpp, application_idle.cpp, calculator.cpp, choice.cpp, combo_box.cpp, context_menu.cpp, demo.cpp, enable_changed_event.cpp, event.cpp, font_changed_event.cpp, form_background_image2.cpp, forms_timer.cpp, hello_world_xtd.cpp, main_menu.cpp, main_menu_create_standard_items.cpp, minesweeper.cpp, month_calendar.cpp, numeric_text_box.cpp, painting.cpp, some_controls.cpp, some_system_controls.cpp, stopwatch_form.cpp, themes.cpp, toggle_button2.cpp, toggle_light.cpp, tool_bar.cpp, tutorial_button.cpp, user_control.cpp, and wiggly.cpp.

Fields
static const event_args	empty
	Provides a value to use with events that do not have event data. More...

Constructors
	event_args ()=default
	Initializes a new instance of the event_args class. More...

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object. More...

bool	equals (const object &obj) const noexcept
	Determines whether the specified object is equal to the current object. More...

virtual size_t	get_hash_code () const noexcept
	Serves as a hash function for a particular type. More...

virtual type_object	get_type () const noexcept
	Gets the type of the current instance. More...

template<typename object_t >
std::unique_ptr< object_t >	memberwise_clone () const noexcept
	Creates a shallow copy of the current object. More...

virtual xtd::ustring	to_string () const noexcept
	Returns a sxd::ustring that represents the current object. More...

Static Public Member Functions inherited from xtd::object
static bool	equals (const object &object_a, const object &object_b) noexcept
	Determines whether the specified object instances are considered equal. More...

static bool	reference_equals (const object &object_a, const object &object_b) noexcept
	Determines whether the specified object instances are the same instance. More...

Constructor & Destructor Documentation

xtd::event_args::event_args ( )

default

Initializes a new instance of the event_args class.

Remarks: To pass an object that does not contain any data, use the empty field.

const event_args xtd::event_args::empty

static

Provides a value to use with events that do not have event data.

Remarks: Pass this value to event handlers that are associated with events that do not have data.

The documentation for this class was generated from the following file: