#include <KGameHighscore>

Inheritance diagram for KGameHighscore:

Public Member Functions
	KGameHighscore (bool forceLocal=true, QObject *parent=nullptr)

	~KGameHighscore () override

QStringList	groupList () const

bool	hasEntry (int entry, const QString &key) const

bool	hasTable () const

QString	highscoreGroup () const

bool	isLocked () const

bool	lockForWriting (QWidget *widget=nullptr)

void	readCurrentConfig ()

QString	readEntry (int entry, const QString &key, const QString &pDefault=QString()) const

QStringList	readList (const QString &key, int lastEntry=20) const

int	readNumEntry (int entry, const QString &key, int pDefault=-1) const

QVariant	readPropertyEntry (int entry, const QString &key, const QVariant &pDefault) const

void	setHighscoreGroup (const QString &groupname=QString())

void	writeAndUnlock ()

void	writeEntry (int entry, const QString &key, const QString &value)

void	writeEntry (int entry, const QString &key, const QVariant &value)

void	writeEntry (int entry, const QString &key, int value)

void	writeList (const QString &key, const QStringList &list)

Public Member Functions inherited from QObject
	QObject (QObject *parent)

QBindable< QString >	bindableObjectName ()

bool	blockSignals (bool block)

const QObjectList &	children () const const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectInfo () const const

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (Qt::FindChildOptions options) const const

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isQuickItemType () const const

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_GADGET_EXPORT (EXPORT_MACRO)

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_MOC_INCLUDE Q_MOC_INCLUDE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setObjectName (QAnyStringView name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	setProperty (const char *name, QVariant &&value)

bool	signalsBlocked () const const

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)

QThread *	thread () const const

Static Public Member Functions
static void	init (const char *appname)

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

QString	tr (const char sourceText, const char disambiguation, int n)

Protected Member Functions
KConfig *	config () const

QString	group () const

void	init (bool forceLocal)

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const const

virtual void	timerEvent (QTimerEvent *event)

Additional Inherited Members
Properties inherited from QObject
	objectName

Public Attributes inherited from QObject
typedef	QObjectList

Detailed Description

Class for managing highscore tables.

This is the KDE class for saving and reading highscore tables. It offers the possibility for system-wide highscore tables (cmake with e.g. -DHIGHSCORE_DIRECTORY=/var/games) and a theoretically unlimited number of entries.

You can specify different "keys" for an entry - just like the KConfig keys. But it will be prefixed with the number of the entry. For example you will probably use something like this to save the name of the player on the top of the list (ie the winner):

highscore->writeEntry(1, "name", myPlayer->name());

QObject::qobject_cast

T qobject_cast(QObject *object)

Note that it does not really matter if you use "0" or "1" as the first entry of the list as long as your program always uses the same for the first entry. I recommend to use "1", as several convenience methods use this.

You can also specify different groups using setHighscoreGroup. Just like the keys mentioned above the groups behave like groups in KConfig but are prefixed with "KHighscore_". The default group is just "KHighscore". You might use this e.g. to create different highscore tables like

table->setHighscoreGroup("Easy");
// write the highscores for level "easy" to the table
writeEasyHighscores(table);
 
table->setHighscore("Player_1");
// write player specific highscores to the table
writePlayerHighscores(table);

As you can see above you can also use this to write the highscores of a single player, so the "best times" of a player. To write highscores for a specific player in a specific level you will have to use a more complex way:

QString group = QStringLiteral("%1_%2").arg(player).arg(level);
table->setGroup(group);
writeHighscore(table, player, level);

Also note that you MUST NOT mark the key or the group for translation! I.e. don't use i18n() for the keys or groups! Here is the code to read the above written entry:

QString firstName = highscore->readEntry(0, "name");

Easy, what?

Author: Andreas Beckermann b_man.nosp@m.n@gm.nosp@m.x.de

Definition at line 73 of file kgamehighscore.h.

Constructor & Destructor Documentation

◆ KGameHighscore()

KGameHighscore::KGameHighscore	(	bool	forceLocal = true,
		QObject *	parent = nullptr )

explicit

Constructor.

Parameters

forceLocal	if true, the local highscore file is used even when the configuration has been set to use a system-wide file. This is convenient for converting highscores from legacy applications.
parent	parent widget for this widget

Definition at line 59 of file kgamehighscore.cpp.

◆ ~KGameHighscore()

KGameHighscore::~KGameHighscore ( )

override

Destructor.

If necessary, write and unlock the highscore file.

Definition at line 191 of file kgamehighscore.cpp.

Member Function Documentation

◆ config()

KConfig * KGameHighscore::config ( ) const

protected

Returns: A pointer to the KConfig object to be used. This is either KGlobal::config() (default) or a KSimpleConfig object for a system-wide highscore file.

Definition at line 196 of file kgamehighscore.cpp.

◆ group()

QString KGameHighscore::group ( ) const

protected

Returns: A groupname to be used in KConfig. Used internally to prefix the value from highscoreGroup() with "KHighscore_"

Definition at line 306 of file kgamehighscore.cpp.

◆ groupList()

QStringList KGameHighscore::groupList ( ) const

Returns a list of group names without the KHighscore_ prexix.

E.g, "KHighscore", "KHighscore_Easy", "KHighscore_Medium" will return "", "Easy", "Medium"

Returns: A list of highscore groups.

Definition at line 288 of file kgamehighscore.cpp.

◆ hasEntry()

bool KGameHighscore::hasEntry	(	int	entry,
		const QString &	key ) const

Returns: True if the highscore table contains the entry/key pair, otherwise false

Definition at line 248 of file kgamehighscore.cpp.

◆ hasTable()

bool KGameHighscore::hasTable ( ) const

You can use this function to indicate whether KGameHighscore created a highscore table before and - if not - read your old (non-KGameHighscore) table instead.

This way you can safely read an old table and save it using KGameHighscore without losing any data

Returns: Whether a highscore table exists.

Definition at line 315 of file kgamehighscore.cpp.

◆ highscoreGroup()

QString KGameHighscore::highscoreGroup ( ) const

Returns: The currently used group. This doesn't contain the prefix ("KHighscore_") but the same as setHighscoreGroup uses. The default is QString()

Definition at line 281 of file kgamehighscore.cpp.

◆ init() [1/2]

void KGameHighscore::init ( bool forceLocal )

protected

Definition at line 66 of file kgamehighscore.cpp.

◆ init() [2/2]

void KGameHighscore::init ( const char * appname )

static

This method open the system-wide highscore file using the effective group id of the game executable (which should be "games").

The effective group id is completely dropped afterwards.

Note: this method should be called in main() before creating a KApplication and doing anything else (KApplication checks that the program is not suid/sgid and will exit the program for security reason if it is the case).

Definition at line 99 of file kgamehighscore.cpp.

◆ isLocked()

bool KGameHighscore::isLocked ( ) const

Returns: true if the highscore file is locked or if a local file is used.

Definition at line 84 of file kgamehighscore.cpp.

◆ lockForWriting()

bool KGameHighscore::lockForWriting ( QWidget * widget = nullptr )

Lock the system-wide highscore file for writing (does nothing and return true if the local file is used).

You should perform writing without GUI interaction to avoid blocking and don't forget to unlock the file as soon as possible with writeAndUnlock().

If the config file cannot be locked, the method waits for 1 second and, if it failed again, displays a message box asking for retry or cancel.

Parameters

widget used as the parent of the message box.

Returns: false on error or if the config file is locked by another process. In such case, the config stays read-only.

Definition at line 135 of file kgamehighscore.cpp.

◆ readCurrentConfig()

void KGameHighscore::readCurrentConfig ( )

Read the current state of the highscore file.

Remember that when it's not locked for writing, this file can change at any time. (This method is only useful for a system-wide highscore file).

Definition at line 91 of file kgamehighscore.cpp.

◆ readEntry()

QString KGameHighscore::readEntry	(	int	entry,
		const QString &	key,
		const QString &	pDefault = QString() ) const

Reads an entry from the highscore table.

Parameters

entry	The number of the entry / the placing to be read
key	The key of the entry. E.g. "name" for the name of the player. Nearly the same as the usual keys in KConfig - but they are prefixed with the entry number
pDefault	This will be used as default value if the key+pair entry can't be found.

Returns: The value of this entry+key pair or pDefault if the entry+key pair doesn't exist

Definition at line 234 of file kgamehighscore.cpp.

◆ readList()

QStringList KGameHighscore::readList	(	const QString &	key,
		int	lastEntry = 20 ) const

Reads a list of entries from the highscore table starting at 1 until lastEntry.

If an entry between those numbers doesn't exist the function aborts reading even if after the missing entry is an existing one. The first entry of the list is the first placing, the last on is the last placing.

Returns: A list of the entries of this key. You could also call readEntry(i, key) where i is from 1 to 20. Note that this function depends on "1" as the first entry!

Parameters

key	The key of the entry. E.g. "name" for the name of the player. Nearly the same as the usual keys in KConfig - but they are prefixed with the entry number
lastEntry	the last entry which will be includes into the list. 1 will include a list with maximal 1 entry - 20 a list with maximal 20 entries. If lastEntry is <= 0 then rading is only stopped when when an entry does not exist.

Definition at line 255 of file kgamehighscore.cpp.

◆ readNumEntry()

int KGameHighscore::readNumEntry	(	int	entry,
		const QString &	key,
		int	pDefault = -1 ) const

Read a numeric value.

Parameters

entry	The number of the entry / the placing to be read
key	The key of the entry. E.g. "name" for the name of the player. Nearly the same as the usual keys in KConfig - but they are prefixed with the entry number
pDefault	This will be used as default value if the key+pair entry can't be found.

Returns: The value of this entry+key pair or pDefault if the entry+key pair doesn't exist

Definition at line 241 of file kgamehighscore.cpp.

◆ readPropertyEntry()

QVariant KGameHighscore::readPropertyEntry	(	int	entry,
		const QString &	key,
		const QVariant &	pDefault ) const

Read a QVariant entry.

See KConfigBase documentation for allowed QVariant::Type.

Returns: the value of this entry+key pair or pDefault if the entry+key pair doesn't exist or

Definition at line 227 of file kgamehighscore.cpp.

◆ setHighscoreGroup()

void KGameHighscore::setHighscoreGroup ( const QString & groupname = QString() )

Set the new highscore group.

The group is being prefixed with "KHighscore_" in the table.

Parameters

groupname The new groupname. E.g. use "easy" for the easy level of your game. If you use QString() (the default) the default group is used.

Definition at line 274 of file kgamehighscore.cpp.

◆ writeAndUnlock()

void KGameHighscore::writeAndUnlock ( )

Effectively write and unlock the system-wide highscore file (.

See also: lockForWriting). If using a local highscore file, it will sync the config.

Definition at line 175 of file kgamehighscore.cpp.

◆ writeEntry() [1/3]

void KGameHighscore::writeEntry	(	int	entry,
		const QString &	key,
		const QString &	value )

Parameters

entry	The number of the entry / the placing of the player
key	A key for this entry. E.g. "name" for the name of the player. Nearly the same as the usual keys in KConfig - but they are prefixed with the entry number
value	The value of this entry

Definition at line 219 of file kgamehighscore.cpp.

◆ writeEntry() [2/3]

void KGameHighscore::writeEntry	(	int	entry,
		const QString &	key,
		const QVariant &	value )

This is an overloaded member function, provided for convenience.

It differs from the above function only in what argument(s) it accepts. See KConfigBase documentation for allowed QVariant::Type.

Definition at line 203 of file kgamehighscore.cpp.

◆ writeEntry() [3/3]

void KGameHighscore::writeEntry	(	int	entry,
		const QString &	key,
		int	value )

This is an overloaded member function, provided for convenience.

It differs from the above function only in what argument(s) it accepts.

Definition at line 211 of file kgamehighscore.cpp.

◆ writeList()

void KGameHighscore::writeList	(	const QString &	key,
		const QStringList &	list )

Writes a list of entries to the highscore table.

The first entry is prefixed with "1". Using this method is a short way of calling writeEntry(i, key, list[i]) from i = 1 to list.count()

Parameters

key	A key for the entry. E.g. "name" for the name of the player. Nearly the same as the usual keys in KConfig - but they are prefixed with the entry number
list	The list of values

Definition at line 267 of file kgamehighscore.cpp.

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

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KGameHighscore

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ KGameHighscore()

◆ ~KGameHighscore()

Member Function Documentation

◆ config()

◆ group()

◆ groupList()

◆ hasEntry()

◆ hasTable()

◆ highscoreGroup()

◆ init() [1/2]

◆ init() [2/2]

◆ isLocked()

◆ lockForWriting()

◆ readCurrentConfig()

◆ readEntry()

◆ readList()

◆ readNumEntry()

◆ readPropertyEntry()

◆ setHighscoreGroup()

◆ writeAndUnlock()

◆ writeEntry() [1/3]

◆ writeEntry() [2/3]

◆ writeEntry() [3/3]

◆ writeList()