The event handler class for the widget library. More...

#include <distributor.hpp>

Inheritance diagram for gui2::event::distributor:

Public Member Functions
	distributor (widget &owner, const dispatcher::queue_position queue_position)

	~distributor ()

void	initialize_state ()
	Initializes the state of the keyboard and mouse. More...

void	keyboard_capture (widget *widget)
	Captures the keyboard input. More...

void	keyboard_add_to_chain (widget *widget)
	Adds the widget to the keyboard chain. More...

void	keyboard_remove_from_chain (widget *widget)
	Remove the widget from the keyboard chain. More...

widget *	keyboard_focus () const
	Return the widget currently capturing keyboard input. More...

Public Member Functions inherited from gui2::event::mouse_button< I >
	mouse_button (widget &owner, const dispatcher::queue_position queue_position)

void	initialize_state (int32_t button_state)
	Initializes the state of the button. More...

Public Member Functions inherited from gui2::event::mouse_motion
	mouse_motion (widget &owner, const dispatcher::queue_position queue_position)

	~mouse_motion ()

void	capture_mouse (const bool capture=true)
	Captures the mouse input. More...

Private Member Functions
void	signal_handler_sdl_key_down (const SDL_Keycode key, const SDL_Keymod modifier, const std::string &unicode)
	Set of functions that handle certain events and sends them to the proper widget. More...

void	signal_handler_sdl_text_input (const std::string &unicode, int32_t start, int32_t len)

void	signal_handler_sdl_text_editing (const std::string &unicode, int32_t start, int32_t len)

template<typename Fcn , typename P1 , typename P2 , typename P3 >
void	signal_handler_keyboard_internal (event::ui_event evt, P1 &&p1, P2 &&p2, P3 &&p3)

void	signal_handler_notify_removal (dispatcher &widget, const ui_event event)

Private Attributes
widget *	keyboard_focus_
	The widget that holds the keyboard focus_. More...

std::vector< widget * >	keyboard_focus_chain_
	Fall back keyboard focus_ items. More...

Additional Inherited Members
Protected Member Functions inherited from gui2::event::mouse_motion
void	start_hover_timer (widget *widget, const point &coordinate)
	Starts the hover timer. More...

void	stop_hover_timer ()
	Stops the current hover timer. More...

void	mouse_enter (widget *mouse_over)
	Called when the mouse enters a widget. More...

void	mouse_leave ()
	Called when the mouse leaves the current widget. More...

Protected Attributes inherited from gui2::event::mouse_button< I >
std::chrono::steady_clock::time_point	last_click_stamp_
	The time of the last click used for double clicking. More...

widget *	last_clicked_widget_
	The widget the last click was on, used for double clicking. More...

widget *	focus_
	If the mouse isn't captured we need to verify the up is on the same widget as the down so we send a proper click, also needed to send the up to the right widget. More...

Protected Attributes inherited from gui2::event::mouse_motion
widget *	mouse_focus_
	The widget that currently has the mouse focus_. More...

bool	mouse_captured_
	Did the current widget capture the focus_? More...

widget &	owner_
	The widget that owns us. More...

std::size_t	hover_timer_
	The timer for the hover event. More...

widget *	hover_widget_
	The widget which should get the hover event. More...

point	hover_position_
	The anchor point of the hover event. More...

bool	hover_shown_
	Has the hover been shown for the widget? More...

Detailed Description

The event handler class for the widget library.

C++ doesn't allow multiple inheritance to directly use more than one instance of a superclass.

It's a diamond inheritance, as all of these have virtual base class mouse_motion; refactoring that would allow these multiple classes to be replaced with a simple (distributor has-a std::array<mouse_button, 3>) relationship.

Definition at line 205 of file distributor.hpp.

Constructor & Destructor Documentation

◆ distributor()

gui2::event::distributor::distributor	(	widget &	owner,
		const dispatcher::queue_position	queue_position
	)

Todo:: Test whether the state is properly tracked when an input blocker is used.

Definition at line 580 of file distributor.cpp.

References gui2::event::dispatcher::connect_signal(), initialize_state(), gui2::event::NOTIFY_REMOVAL, gui2::event::mouse_motion::owner_, gui2::event::SDL_KEY_DOWN, gui2::event::SDL_TEXT_EDITING, gui2::event::SDL_TEXT_INPUT, signal_handler_notify_removal(), signal_handler_sdl_key_down(), signal_handler_sdl_text_editing(), and signal_handler_sdl_text_input().

◆ ~distributor()

gui2::event::distributor::~distributor ( )

Definition at line 628 of file distributor.cpp.

References gui2::event::dispatcher::disconnect_signal(), gui2::event::NOTIFY_REMOVAL, gui2::event::mouse_motion::owner_, gui2::event::SDL_KEY_DOWN, gui2::event::SDL_TEXT_EDITING, gui2::event::SDL_TEXT_INPUT, signal_handler_notify_removal(), signal_handler_sdl_key_down(), signal_handler_sdl_text_editing(), and signal_handler_sdl_text_input().

Member Function Documentation

◆ initialize_state()

void gui2::event::distributor::initialize_state ( )

Initializes the state of the keyboard and mouse.

Needed after initialization and reactivation.

Definition at line 662 of file distributor.cpp.

References sdl::get_mouse_button_mask(), gui2::event::init_mouse_location(), and gui2::event::mouse_button< I >::initialize_state().

Referenced by distributor().

◆ keyboard_add_to_chain()

void gui2::event::distributor::keyboard_add_to_chain ( widget * widget )

Adds the widget to the keyboard chain.

Parameters

widget The widget to add to the chain. The widget should be valid widget, which hasn't been added to the chain yet.

Definition at line 693 of file distributor.cpp.

References keyboard_focus_chain_.

◆ keyboard_capture()

void gui2::event::distributor::keyboard_capture ( widget * widget )

Captures the keyboard input.

Parameters

widget The widget which should capture the keyboard. Sending nullptr releases the capturing.

Definition at line 678 of file distributor.cpp.

References DBG_GUI_E, gui2::event::dispatcher::fire(), keyboard_focus_, LOG_HEADER, gui2::event::LOSE_KEYBOARD_FOCUS, gui2::event::mouse_motion::owner_, and gui2::event::RECEIVE_KEYBOARD_FOCUS.

◆ keyboard_focus()

widget * gui2::event::distributor::keyboard_focus ( ) const

Return the widget currently capturing keyboard input.

Definition at line 673 of file distributor.cpp.

References keyboard_focus_.

◆ keyboard_remove_from_chain()

void gui2::event::distributor::keyboard_remove_from_chain ( widget * widget )

Remove the widget from the keyboard chain.

Parameters

widget The widget to be removed from the chain.

Definition at line 700 of file distributor.cpp.

References keyboard_focus_chain_, and w.

◆ signal_handler_keyboard_internal()

template<typename Fcn , typename P1 , typename P2 , typename P3 >

void gui2::event::distributor::signal_handler_keyboard_internal	(	event::ui_event	evt,
		P1 &&	p1,
		P2 &&	p2,
		P3 &&	p3
	)

private

Todo:: Test whether recursion protection is needed.

Todo:: Make sure we're not in the event chain.

No idea why we're here, but needs to be fixed, otherwise we keep calling this function recursively upon unhandled events...

Probably added to make sure the window can grab the events and handle + block them when needed, this is no longer needed with the chain.

Definition at line 711 of file distributor.cpp.

References DBG_GUI_E, gui2::event::dispatcher::fire(), gui2::styled_widget::get_active(), keyboard_focus_, keyboard_focus_chain_, LOG_HEADER, and gui2::event::mouse_motion::owner_.

◆ signal_handler_notify_removal()

void gui2::event::distributor::signal_handler_notify_removal	(	dispatcher &	widget,
		const ui_event	event
	)

private

Todo:: Evaluate whether moving the cleanup parts in the subclasses.

It might be cleaner to do it that way, but creates extra small functions...

Definition at line 785 of file distributor.cpp.

References DBG_GUI_E, gui2::event::mouse_button< I >::focus_, gui2::event::mouse_motion::hover_widget_, keyboard_focus_, keyboard_focus_chain_, gui2::event::mouse_button< I >::last_clicked_widget_, LOG_HEADER, gui2::event::mouse_motion::mouse_focus_, gui2::event::mouse_motion::stop_hover_timer(), and w.

Referenced by distributor(), and ~distributor().

◆ signal_handler_sdl_key_down()

void gui2::event::distributor::signal_handler_sdl_key_down	(	const SDL_Keycode	key,
		const SDL_Keymod	modifier,
		const std::string &	unicode
	)

private

Set of functions that handle certain events and sends them to the proper widget.

These functions are called by the SDL event handling functions.

Definition at line 770 of file distributor.cpp.

References gui2::event::SDL_KEY_DOWN.

Referenced by distributor(), and ~distributor().

◆ signal_handler_sdl_text_editing()

void gui2::event::distributor::signal_handler_sdl_text_editing	(	const std::string &	unicode,
		int32_t	start,
		int32_t	len
	)

private

Definition at line 780 of file distributor.cpp.

References gui2::event::SDL_TEXT_EDITING, and editor::start().

Referenced by distributor(), and ~distributor().

◆ signal_handler_sdl_text_input()

void gui2::event::distributor::signal_handler_sdl_text_input	(	const std::string &	unicode,
		int32_t	start,
		int32_t	len
	)

private

Definition at line 775 of file distributor.cpp.

References gui2::event::SDL_TEXT_INPUT, and editor::start().

Referenced by distributor(), and ~distributor().

Member Data Documentation

◆ keyboard_focus_

widget* gui2::event::distributor::keyboard_focus_

private

The widget that holds the keyboard focus_.

Definition at line 253 of file distributor.hpp.

Referenced by keyboard_capture(), keyboard_focus(), signal_handler_keyboard_internal(), and signal_handler_notify_removal().

◆ keyboard_focus_chain_

std::vector<widget*> gui2::event::distributor::keyboard_focus_chain_

private

Fall back keyboard focus_ items.

When the focused widget didn't handle the keyboard event (or no handler for the keyboard focus_) it is send all widgets in this vector. The order is from rbegin() to rend(). If the keyboard_focus_ is in the vector it won't get the event twice. The first item added to the vector should be the window, so it will be the last handler and can dispatch the hotkeys registered.

Definition at line 265 of file distributor.hpp.

Referenced by keyboard_add_to_chain(), keyboard_remove_from_chain(), signal_handler_keyboard_internal(), and signal_handler_notify_removal().

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

gui/core/event/distributor.hpp
gui/core/event/distributor.cpp

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ distributor()

◆ ~distributor()

Member Function Documentation

◆ initialize_state()

◆ keyboard_add_to_chain()

◆ keyboard_capture()

◆ keyboard_focus()

◆ keyboard_remove_from_chain()

◆ signal_handler_keyboard_internal()

◆ signal_handler_notify_removal()

◆ signal_handler_sdl_key_down()

◆ signal_handler_sdl_text_editing()

◆ signal_handler_sdl_text_input()

Member Data Documentation

◆ keyboard_focus_

◆ keyboard_focus_chain_