Use data sources to separate the user interface from the application data and to remove the dependencies between a Kanzi Studio project and the application code which define the Kanzi application. More...

#include <kanzi/core.ui/data/data_source.hpp>

Inheritance diagram for kanzi::DataSource:

Public Member Functions
virtual void	loadFromKZB (const ResourceLoaderThreadContext threadContext, KzcInputStream inputStream, const KzuBinaryFileInfo *file) KZ_OVERRIDE
	Resource interface. More...

virtual DataContextSharedPtr	lookupDataContext (string_view relativePath) KZ_OVERRIDE
	DataContext interface. More...

virtual DataObjectSharedPtr	getData () KZ_OVERRIDE
	Returns no data. More...

Public Member Functions inherited from kanzi::DataContext
ModifiedSubscriptionToken	addModifiedNotificationHandler (ModifiedFunction callback)
	Allows to subscribe to modifications in this data context. More...

void	removeModifiedNotificationHandler (ModifiedSubscriptionToken token)
	Allows to unsubscribe from modifications in this data context. More...

void	notifyModified ()
	Triggers modification procedure in this data context, which invokes the subscriptions. More...

template<typename Type >
shared_ptr< Type >	lookupDataContextOfType (string_view relativePath)

ResourceSharedPtr	getDataContext () const
	Gets the value of DataContextProperty. More...

void	setDataContext (ResourceSharedPtr value)
	Sets the value of DataContextProperty. More...

ResourceSharedPtr	getItemsSource () const
	Gets the value of ItemsSourceProperty. More...

void	setItemsSource (ResourceSharedPtr value)
	Sets the value of ItemsSourceProperty. More...

Public Member Functions inherited from kanzi::Resource
KzcMemoryManager *	getMemoryManager () const

	Resource (Domain *domain, string_view name)

virtual	~Resource ()

virtual void	unloadOverride ()
	Unload function for resource. Releases all CPU memory taken by the resource except the resource loader. More...

virtual unsigned int	getCPUMemoryUsage () const
	Function for getting the memory usage of a resource. More...

void	setKZB (const KzuBinaryDirectory *binaryDirectory, string_view path)
	Set the binary directory and path of the resource. More...

const string &	getName () const
	Gets the resource name. More...

const string &	getUrl () const
	Gets the resource URL. More...

void	setUrl (string_view url)
	Sets the resource URL. More...

void	setNotLoaded ()

bool	isFromKZB () const

void	reload ()

void	reloadFromKzb (KzcInputStream inputStream, const KzuBinaryFileInfo file)

void	reloadFromKzb (KzbFile &kzbFile, ReadOnlyMemoryFile &file, KzbMemoryParser &parser)

void	reloadFromFile (string_view filePath)

void	load ()

void	unload ()

bool	isLoaded () const

void	kzuResourceLoad_private (const ResourceLoaderThreadContext *threadContext)
	Private function for kzuResourceLoad() with specified thread context. More...

void	kzuResourceFinishLoading_private (const ResourceLoaderThreadContext *threadContext)
	Private function for finishing the loading of the resource. More...

bool	isKeepAlive () const
	Tells if the resource has keep alive flag set. More...

void	setKeepAlive (bool keepAlive)
	Sets the keep alive flag. More...

Public Member Functions inherited from kanzi::Object
	Object (Domain *domain)

virtual	~Object ()

Domain *	getDomain () const
	Returns the domain the object belongs to. More...

KzuTaskScheduler *	getTaskScheduler () const
	Returns the task scheduler of the object. More...

KzuMessageDispatcher *	getMessageDispatcher () const
	Returns the message dispatcher of the object. More...

ResourceManager *	getResourceManager () const
	Returns the resource manager of the object. More...

virtual const Metaclass *	getDynamicMetaclass () const KZ_OVERRIDE
	Returns the metaclass of the dynamic type of the object. More...

AppliedStyleEntrySharedPtr	applyObjectStyle (kanzi::StyleSharedPtr style)
	Applies a style to an object. More...

void	unapplyObjectStyle (AppliedStyleEntrySharedPtr appliedStyleEntry)

void	applyObjectStyles ()
	Apply all styles for an object node. More...

void	unapplyObjectStyles ()
	Unapplies and removes all applied styles. More...

Public Member Functions inherited from kanzi::MetaObject
virtual	~MetaObject ()

bool	isTypeOf (const Metaclass *objectType) const
	Determines if the type of this object is the given type or derived from it. More...

Public Member Functions inherited from kanzi::PropertyObject
	PropertyObject ()

virtual	~PropertyObject ()

template<typename DataType >
void	setProperty (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Traits::ParameterType value)
	Sets the local value of a property. More...

void	removeKzbProperties ()

template<typename DataType >
PropertyType< DataType >::Traits::ReturnType	getProperty (const PropertyType< DataType > &propertyType) const
	Returns the current value of a property. More...

template<typename DataType >
optional< typename PropertyType< DataType >::Traits::ReturnType >	getOptionalProperty (const PropertyType< DataType > &propertyType) const
	Evaluates the property value in the same way as the overload above but does not default to the value in property metadata if there are no inputs to the property value. More...

template<typename DataType >
PropertyType< DataType >::Traits::ReturnType	getPropertyBase (const PropertyType< DataType > &propertyType) const
	Returns the current value of a property disregarding modifiers. More...

template<typename DataType >
void	setAbstractProperty (AbstractPropertyType abstractPropertyType, typename PropertyType< DataType >::Traits::ParameterType value)

template<typename DataType >
PropertyType< DataType >::Traits::ReturnType	getAbstractProperty (AbstractPropertyType abstractPropertyType) const

template<typename DataType >
PropertyType< DataType >::Traits::ReturnType	getAbstractPropertyBase (AbstractPropertyType abstractPropertyType) const

template<typename DataType >
optional< typename PropertyType< DataType >::Traits::ReturnType >	getOptionalAbstractProperty (AbstractPropertyType abstractPropertyType) const

void	setPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)

bool	isPropertyFlagSet (AbstractPropertyType propertyType, uint32_t flag) const

void	clearPropertyFlag (AbstractPropertyType propertyType, uint32_t flag)

bool	hasValue (AbstractPropertyType propertyType) const
	Evaluates whether there are any inputs into the property value. More...

bool	hasBaseValue (AbstractPropertyType propertyType) const
	Evaluates whether there are any inputs into the property value, disregarding modifiers. More...

bool	hasLocalValue (AbstractPropertyType propertyType) const
	Evaluates whether there is a local value set for the property. More...

bool	hasNonClassValue (AbstractPropertyType propertyType) const
	Evaluates whether there is a value of any precedence higher than class default value set for the property. More...

void	removeLocalValue (AbstractPropertyType propertyType)
	Removes the local value associated with the property. More...

void	copyLocalValue (const PropertyObject &other, AbstractPropertyType propertyType)
	Copies local value of single property from another object. More...

void	copyLocalValues (const PropertyObject &other)
	Copies all local values from another object. More...

virtual void	onPropertyChanged (AbstractPropertyType propertyType, PropertyNotificationReason reason)
	Virtual function to handle property change notifications. More...

template<typename DataType >
void	addPropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource valueSource, PropertyValuePrecedence precedence, void owner)

template<typename DataType >
void	removePropertyValueSource (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::TypedValueSource valueSource, void owner)

template<typename DataType >
void	addPropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)

template<typename DataType >
void	removePropertyModifier (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::ModifierCallback callback, void *owner)

void	validatePropertyModifiers (AbstractPropertyType propertyType)

template<typename DataType >
void	addPropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)

template<typename DataType >
void	removePropertyNotificationHandler (const PropertyType< DataType > &propertyType, typename PropertyType< DataType >::Descriptor::NotificationCallback callback, void *owner)

template<typename DataType >
size_t	getPropertyNotificationHandlerCount (const PropertyType< DataType > &propertyType)
	Gets number of current notification handlers for given property type. More...

Static Public Member Functions
static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()

static DataSourceSharedPtr	loadFromKZB (Domain *domain, string_view name, KzbFile &kzbFile, ReadOnlyMemoryFile &file, KzbMemoryParser &parser)
	Load and create data source from kzb. More...

static DataSourceSharedPtr	create (Domain *domain, string_view name)
	Creates an empty DataSource. More...

Static Public Member Functions inherited from kanzi::DataContext
static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()

Static Public Member Functions inherited from kanzi::Object
static const Metaclass *	getStaticMetaclass ()
	Returns the metaclass of Object class. More...

static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()
	Default implementation that returns empty editor info. More...

Static Public Member Functions inherited from kanzi::MetaObject
static const Metaclass *	getStaticMetaclass ()
	Returns the metaclass of Object class. More...

static PropertyTypeEditorInfoSharedPtr	makeEditorInfo ()
	Default implementation that returns empty editor info. More...

Protected Member Functions
	DataSource (Domain *domain, string_view name)
	Standard constructor. More...

virtual void	loadFromKZB (Domain *domain, KzbFile &kzbFile, ReadOnlyMemoryFile &file, KzbMemoryParser &parser)
	Loads data source from kzb. More...

virtual void	onLoaded ()
	Override function called after loadFromKZB. More...

Protected Member Functions inherited from kanzi::DataContext
	DataContext (Domain *domain, string_view name)
	Protected standard constructor. More...

Protected Member Functions inherited from kanzi::Resource
virtual void	reloadOverride ()

virtual void	reloadFromKzbOverride (KzcInputStream inputStream, const KzuBinaryFileInfo file)

virtual void	reloadFromKzbOverride (KzbFile &kzbFile, ReadOnlyMemoryFile &file, KzbMemoryParser &parser)

virtual void	reloadFromFileOverride (string_view filePath)

virtual unsigned int	getCPUMemoryUsageOverride () const

Protected Member Functions inherited from kanzi::Object
void	initialize ()

void	onCopy (const Object &other)

Protected Member Functions inherited from kanzi::MetaObject
	MetaObject ()

void	initialize ()

Protected Member Functions inherited from kanzi::PropertyObject
void	addPropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource valueSource, PropertyValuePrecedence precedence, void owner)

void	removePropertyValueSource (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::ValueSource valueSource, void owner)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	getTopValueSourceEntry (AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage) const

AbstractPropertyTypeDescriptor::ValueSourceEntry *	getTopValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getTopValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getFinalValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getNonClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSource *	getClassValueSource (AbstractPropertyTypeDescriptor &descriptor) const

AbstractPropertyTypeDescriptor::ValueSourceEntry *	findLocalValueSourceEntry (AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	constructLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)

AbstractPropertyTypeDescriptor::ValueSourceEntry *	acquireLocalValueSourceEntry (AbstractPropertyTypeDescriptor &descriptor, PropertyStoragePtr &propertyStorage)

AbstractPropertyTypeDescriptor::PropertyStorage *	findPropertyStorage (AbstractPropertyTypeDescriptor &descriptor) const

PropertyStoragePtr	findPropertyStoragePtr (AbstractPropertyTypeDescriptor &descriptor) const
	Gets property storage intrusive pointer that can be used to hold a reference until end of operation. More...

PropertyStoragePtr	constructPropertyStorage (AbstractPropertyTypeDescriptor &descriptor)

PropertyStoragePtr	acquirePropertyStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::ModifierStorage *	acquireModifierStorage (AbstractPropertyTypeDescriptor &descriptor, AbstractPropertyTypeDescriptor::PropertyStorage &propertyStorage)

AbstractPropertyTypeDescriptor::ModifierStorage *	findModifierStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::NotificationStorage *	acquireNotificationStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor::NotificationStorage *	findNotificationStorage (AbstractPropertyTypeDescriptor &descriptor)

AbstractPropertyTypeDescriptor *	findPropertyTypeDescriptorByUnqualifiedNameAndDataType (string_view unqualifiedName, PropertyDataType dataType)

void	validatePropertyModifiersAndNotifyHandlers (PropertyStoragePtr &propertyStorage)

void	copyLocalValue (const AbstractPropertyTypeDescriptor::PropertyStorage &otherPropertyStorage)
	Copy local value from property storage. More...

PropertyStorageContainer::iterator	beginPropertyStorage ()

PropertyStorageContainer::iterator	endPropertyStorage ()

virtual void	notifyPropertyHandlers (PropertyStoragePtr &propertyStorage, PropertyNotificationReason reason)

void	onCopy (const PropertyObject &other)

Additional Inherited Members
Public Types inherited from kanzi::DataContext
typedef function< void()>	ModifiedFunction
	Callback function type for change subscriptions. More...

typedef shared_ptr< void >	ModifiedSubscriptionToken
	Token type that can be used to identify the change subscription. More...

Public Types inherited from kanzi::PropertyObject
typedef intrusive_ptr< AbstractPropertyTypeDescriptor::PropertyStorage >	PropertyStoragePtr

typedef vector< PropertyStoragePtr >	PropertyStorageContainer

typedef PropertyStorageContainer::iterator	PropertyStorageIterator

typedef PropertyStorageContainer::const_iterator	PropertyStorageConstIterator

typedef PropertyStorageContainer::reverse_iterator	PropertyStorageReverseIterator

Static Public Attributes inherited from kanzi::DataContext
static PropertyType< ResourceSharedPtr >	DataContextProperty
	DataContext property. More...

static PropertyType< ResourceSharedPtr >	ItemsSourceProperty
	ItemsSource property. More...

Protected Types inherited from kanzi::DataContext
typedef shared_ptr< ModifiedSubscription >	ModifiedSubscriptionSharedPtr
	Subscription shared pointer type. More...

typedef vector< ModifiedSubscriptionSharedPtr >	ModifiedSubscriptionContainer
	Container for subscriptions. More...

Protected Types inherited from kanzi::Object
typedef vector< AppliedStyleEntrySharedPtr >	AppliedStyleContainer
	Applied style container. More...

Protected Attributes inherited from kanzi::DataContext
ModifiedSubscriptionContainer	m_subscriptions
	Subscriptions to data context being modified. More...

unsigned int	m_notificationPassGuard
	Notification pass guard integer for triggering removal at end. More...

Protected Attributes inherited from kanzi::Object
AppliedStyleContainer	m_appliedStyles
	Listing of applied styles applied to this object. More...

Detailed Description

Use data sources to separate the user interface from the application data and to remove the dependencies between a Kanzi Studio project and the application code which define the Kanzi application.

Kanzi allows you to define the format and structure of your data source by defining a Kanzi Engine data source plugin.

When you use a data source in a Kanzi application you bind the values of properties and property fields to data that comes from a data source. This binding establishes a connection between a node or a resource and the application data. When data in the data source changes, the nodes and resources which are bound to the data reflect the change in the data.

To set a node to use a data source, use the DataContext::DataContext property. When you set the Data Context property for a node, all its child nodes inherit the value of the Data Context property. After you set a node to use a data source, you can use bindings to access the data. See Binding::createFromDataObjectPath.

Set the value of the DataContext::DataContext property to one of these:

Uri that defines the resource.
Resource ID that defines the resource in a resource dictionary.
Path that allows to navigate further within the current data context. For example:
```
$.car.cluster
```

The format of a data context binding is:

{DataContext.path.to.data}

For example:

{DataContext.car.cluster.speed}

Data context bindings support all standard Kanzi binding features, such as expressions.

Constructor & Destructor Documentation

kanzi::DataSource::DataSource	(	Domain *	domain,
		string_view	name
	)

explicitprotected

Standard constructor.

Parameters

domain	The UI domain the new resource belongs to.
name	Name of the data source.

Member Function Documentation

static PropertyTypeEditorInfoSharedPtr kanzi::DataSource::makeEditorInfo ( )

static

virtual void kanzi::DataSource::loadFromKZB	(	const ResourceLoaderThreadContext *	threadContext,
		KzcInputStream *	inputStream,
		const KzuBinaryFileInfo *	file
	)

virtual

Resource interface.

Reimplemented from kanzi::Resource.

virtual DataContextSharedPtr kanzi::DataSource::lookupDataContext ( string_view relativePath )

virtual

DataContext interface.

Implements kanzi::DataContext.

static DataSourceSharedPtr kanzi::DataSource::loadFromKZB	(	Domain *	domain,
		string_view	name,
		KzbFile &	kzbFile,
		ReadOnlyMemoryFile &	file,
		KzbMemoryParser &	parser
	)

static

Load and create data source from kzb.

Parameters

domain	Domain
name	Data source name.
kzbFile	KZB file where to load from.
file	Data source file inside KZB file where to load from.
parser	File memory parser.

Returns: Loaded data source.

static DataSourceSharedPtr kanzi::DataSource::create	(	Domain *	domain,
		string_view	name
	)

inlinestatic

Creates an empty DataSource.

virtual DataObjectSharedPtr kanzi::DataSource::getData ( )

inlinevirtual

Returns no data.

Implements kanzi::DataContext.

virtual void kanzi::DataSource::loadFromKZB	(	Domain *	domain,
		KzbFile &	kzbFile,
		ReadOnlyMemoryFile &	file,
		KzbMemoryParser &	parser
	)

protectedvirtual

Loads data source from kzb.

Parameters

domain	Domain
kzbFile	KZB file where to load from.
file	Brush file inside KZB file where to load from.
parser	File memory parser.

virtual void kanzi::DataSource::onLoaded ( )

inlineprotectedvirtual

Override function called after loadFromKZB.

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

kanzi/core.ui/data/data_source.hpp

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation