# QCA::EventHandler Class Reference
[QCA user API]

Interface class for password / passphrase / PIN and token handlers. More...

`#include <QtCrypto>`

Inheritance diagram for QCA::EventHandler:

Collaboration diagram for QCA::EventHandler:

[legend]

List of all members.

## Signals

void | eventReady (int id, const QCA::Event &context)

## Public Member Functions

| EventHandler (QObject *parent=0)
void | reject (int id)
void | start ()
void | submitPassword (int id, const SecureArray &password)
void | tokenOkay (int id)

## Friends

class | Private

## Detailed Description

Interface class for password / passphrase / PIN and token handlers.

This class is used on client side applications to handle the provision of passwords, passphrases and PINs by users, and to indicate that tokens have been correctly inserted.

The concept behind this class is that the library can raise events (typically using PasswordAsker or TokenAsker), which may (or may not) be handled by the application using a handler object (that has-a EventHandler, or possibly is-a EventHandler) that is connected to the eventReady() signal.

Examples:

  eventhandlerdemo.cpp, and keyloader.cpp.

## Constructor & Destructor Documentation

QCA::EventHandler::EventHandler | ( | QObject * | parent = `0` | ) |

Constructor.

Parameters:

  | parent | the parent object for this object

## Member Function Documentation

void QCA::EventHandler::eventReady | ( | int | id,
|  | const QCA::Event & | context |
| ) |  |  | `[signal]`

signal emitted when an Event requires attention.

You typically need to connect this signal to a compatible slot in your callback handler

Parameters:

  | id | the identification number for the event
  | context | information about the type of response required

void QCA::EventHandler::reject | ( | int | id | ) |

function to call to indicate that the user declined to provide a password, passphrase, PIN or token.

Parameters:

  | id | the id corresponding to the password request

Note:
  the id parameter is the same as that provided in the eventReady() signal.

void QCA::EventHandler::start | ( |  | ) |

mandatory function to call after connecting the signal to a slot in your application specific password / passphrase / PIN or token handler

void QCA::EventHandler::submitPassword | ( | int | id,
|  | const SecureArray & | password |
| ) |  |  |

function to call to return the user provided password, passphrase or PIN.

Parameters:

  | id | the id corresponding to the password request
  | password | the user-provided password, passphrase or PIN.

Note:
  the id parameter is the same as that provided in the eventReady() signal.

void QCA::EventHandler::tokenOkay | ( | int | id | ) |

function to call to indicate that the token has been inserted by the user.

Parameters:

  | id | the id corresponding to the password request

Note:
  the id parameter is the same as that provided in the eventReady() signal.

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

- qca_core.h