#include <exceptions.h>

Inheritance diagram for UserCanceled:

Collaboration diagram for UserCanceled:

Public Member Functions
	UserCanceled ()=delete
	Default Constructor. More...

	UserCanceled (const char *file, int line, const QString &msg=QString("User Canceled")) noexcept
	The default constructor. More...

	UserCanceled (const UserCanceled &other) noexcept
	The copy constructor (needed for clone()) More...

virtual void	raise () const override

virtual UserCanceled *	clone () const override

Public Member Functions inherited from Exception
	Exception ()=delete
	The default constructor. More...

	Exception (const Exception &other) noexcept
	The copy constructor (needed for clone()) More...

	Exception (const char *file, int line, const QString &msg=QString("Exception")) noexcept
	The constructor which is used to throw an exception. More...

virtual	~Exception () noexcept
	The destructor. More...

const QString &	getMsg () const
	Get the error message (translated) More...

const QString &	getFile () const
	Get the source file where the exception was thrown. More...

int	getLine () const
	Get the line number where the exception was thrown. More...

const char *	what () const noexcept override
	reimplemented from std::exception::what() More...

virtual void	raise () const override

virtual Exception *	clone () const override

Detailed Description

The UserCanceled class.

This exception class is used to interrupt an action which was canceled by the user. This type of exception is useful if the exception catcher do not need to show a message box with the error message. For example, if a project is opened, the project's constructor will throw an exception in case of an error. Then the caller (the catcher of the exception) will show a message box with the error message. But the constructor can also throw an exception if the user has canceled opening the project (for example in a message box "restore project?" --> YES|NO|CANCEL). But then the error message box do not need to appear! So we can throw an exception of type "UserCanceled" to indicate that this was a user's decision and the catcher will not show an error message box.

Note: Normally, a UserCanceled exception do not need the attribute mMsg, so you do not need to pass the parameter "msg" to the constructor. This is because such an exception will never produce a message box with the error message (as there is not really an error - the user has simply canceled something).

See also: Exception

Constructor & Destructor Documentation

◆ UserCanceled() [1/3]

UserCanceled ( )

delete

Default Constructor.

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◆ UserCanceled() [2/3]

UserCanceled	(	const char *	file,
		int	line,
		const QString &	msg = `QString("User Canceled")`
	)

noexcept

The default constructor.

◆ UserCanceled() [3/3]

UserCanceled ( const UserCanceled & other )

noexcept

The copy constructor (needed for clone())

Member Function Documentation

◆ raise()

virtual void raise ( ) const

inlineoverridevirtual

Reimplemented from Exception.

◆ clone()

virtual UserCanceled * clone ( ) const