EventVar Class Reference

Generic event handling between MVC Model and Controller based on a shared EventVar variable. More...

#include <observable_evtvar.h>

Inheritance diagram for EventVar:

Public Member Functions
const void	Notify ()
	Notify all listeners, no data supplied.
const void	Notify (void *data)
	Notify all listeners about variable change with ClientData.
const void	Notify (const std::string &s)
	Notify all listeners about variable change with a string.
const void	Notify (int n, const std::string &s)
	Notify all listeners about variable change with a string and an int.
const void	Notify (std::shared_ptr< void > p, const std::string &s, int n=0)
	Notify all listeners about variable change with shared_ptr, a string and an optional number.
Public Member Functions inherited from Observable
	Observable (const std::string &_key)
	Observable (const KeyProvider &kp)
const void	Notify (std::shared_ptr< const void > p)
bool	Unlisten (wxEvtHandler *listener, wxEventType ev)
	Remove window listening to ev from list of listeners. More...
std::string	GetKey () const

Additional Inherited Members
Public Attributes inherited from Observable
const std::string	key
	The key used to create and clone.
Protected Member Functions inherited from Observable
const void	Notify (std::shared_ptr< const void > ptr, const std::string &s, int num, void *client_data)
	Notify all listeners: send them a 'type' ObservedEvt message as defined by listen() with optional data available using GetString() and/or GetClientData().
const void	Notify (const std::string &s, void *client_data)

Detailed Description

Generic event handling between MVC Model and Controller based on a shared EventVar variable.

Model usage:

class Model: ...
public:
  EventVar change;
 
  void some_method() {
    ...
    change.Notify("new value")
  }

Controller/GUI usage:

class Gui: public wxEvtHandler {
public:
  Gui:Gui(Model& model) {
    auto action = [&](wxCommandEvent ev) {
      auto s = ev.GetString();    // s -> "new value"
      ... do something;
    });
    change_listener.Init(model.change, action);
  }
 
private:
  ObsListener change_listener;
}

Definition at line 71 of file observable_evtvar.h.

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

• /home/runner/work/OpenCPN/OpenCPN/libs/observable/include/observable_evtvar.h