LibreOffice
LibreOffice 24.2 SDK API Reference
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is the basic interface for object inspection. More...
import"XPropertyHandler.idl";
Exported Interfaces | |
interface | com::sun::star::lang::XComponent |
used for controlling resources acquired by the handler More... | |
Public Member Functions | |
void | inspect ([in] com::sun::star::uno::XInterface Component) raises ( com::sun::star::lang::NullPointerException ) |
binds the property handler to a new component More... | |
any | getPropertyValue ([in] string PropertyName) raises (::com::sun::star::beans::UnknownPropertyException) |
retrieves the current value of a property More... | |
void | setPropertyValue ([in] string PropertyName, [in] any Value) raises (::com::sun::star::beans::UnknownPropertyException, ::com::sun::star::beans::PropertyVetoException) |
sets the value of a property More... | |
com::sun::star::beans::PropertyState | getPropertyState ([in] string PropertyName) raises (::com::sun::star::beans::UnknownPropertyException) |
returns the state of a property More... | |
LineDescriptor | describePropertyLine ([in] string PropertyName, [in] XPropertyControlFactory ControlFactory) raises (::com::sun::star::beans::UnknownPropertyException, ::com::sun::star::lang::NullPointerException) |
describes the UI to be used to represent the property More... | |
any | convertToPropertyValue ([in] string PropertyName, [in] any ControlValue) raises (::com::sun::star::beans::UnknownPropertyException) |
converts a given control-compatible value to a property value More... | |
any | convertToControlValue ([in] string PropertyName, [in] any PropertyValue, [in] type ControlValueType) raises (::com::sun::star::beans::UnknownPropertyException) |
converts a given property value to a control-compatible value More... | |
void | addPropertyChangeListener ([in] com::sun::star::beans::XPropertyChangeListener Listener) raises ( com::sun::star::lang::NullPointerException ) |
registers a listener for notification about property value changes More... | |
void | removePropertyChangeListener ([in] com::sun::star::beans::XPropertyChangeListener Listener) |
revokes a listener for notification about property value changes More... | |
sequence< com::sun::star::beans::Property > | getSupportedProperties () |
returns the properties which the handler can handle More... | |
sequence< string > | getSupersededProperties () |
returns the properties which are to be superseded by this handler More... | |
sequence< string > | getActuatingProperties () |
retrieve the actuating properties which this handler is interested in More... | |
boolean | isComposable ([in] string PropertyName) raises (::com::sun::star::beans::UnknownPropertyException) |
determines whether a given property, which the handler is responsible for, is composable. More... | |
::com::sun::star::inspection::InteractiveSelectionResult | onInteractivePropertySelection ([in] string PropertyName, [in] boolean Primary, [out] any outData, [in] XObjectInspectorUI InspectorUI) raises (::com::sun::star::beans::UnknownPropertyException, ::com::sun::star::lang::NullPointerException) |
called when a browse button belonging to a property UI representation has been clicked More... | |
void | actuatingPropertyChanged ([in] string ActuatingPropertyName, [in] any NewValue, [in] any OldValue, [in] XObjectInspectorUI InspectorUI, [in] boolean FirstTimeInit) raises (::com::sun::star::lang::NullPointerException) |
updates the UI of dependent properties when the value of a certain actuating property changed More... | |
boolean | suspend ([in] boolean Suspend) |
suspends the handler More... | |
Public Member Functions inherited from XComponent | |
void | dispose () |
The owner of an object calls this method to explicitly free all resources kept by this object and thus break cyclic references. More... | |
void | addEventListener ([in] XEventListener xListener) |
adds an event listener to the object. More... | |
void | removeEventListener ([in] XEventListener aListener) |
removes an event listener from the listener list. More... | |
Public Member Functions inherited from XInterface | |
any | queryInterface ([in] type aType) |
queries for a new interface to an existing UNO object. More... | |
void | acquire () |
increases the reference counter by one. More... | |
void | release () |
decreases the reference counter by one. More... | |
is the basic interface for object inspection.
The ObjectInspector itself does not know anything about the object it is inspecting, all information is obtained via XPropertyHandlers. Also, property handlers are responsible for describing the user interface which should be used to interact with the user, with respect to a given aspect of the inspected component.
interface com::sun::star::lang::XComponent |
used for controlling resources acquired by the handler
com::sun::star::lang::XComponent::dispose() is invoked when the property handler is not needed by the object inspector anymore. Handler implementations should clean up any resources here.
void actuatingPropertyChanged | ( | [in] string | ActuatingPropertyName, |
[in] any | NewValue, | ||
[in] any | OldValue, | ||
[in] XObjectInspectorUI | InspectorUI, | ||
[in] boolean | FirstTimeInit | ||
) | |||
raises | ( | ::com::sun::star::lang::NullPointerException | |
) |
updates the UI of dependent properties when the value of a certain actuating property changed
This method is called whenever a property value changes, limited to those properties whose changes the handler expressed interest in (see getActuatingProperties()).
ActuatingPropertyName | the id of the actuating property. |
NewValue | the new value of the property |
OldValue | the old value of the property |
InspectorUI | a callback for updating the object inspector UI |
FirstTimeInit | If TRUE , the method is called for the first-time update of the respective property, that is, when the property browser is just initializing with the properties of the introspected object.If FALSE , there was a real com::sun::star::beans::XPropertyChangeListener::propertyChange() event which triggered the call.In some cases it may be necessary to differentiate between both situations. For instance, if you want to set the value of another property when an actuating property's value changed, you should definitely not do this when FirstTimeInit is TRUE . |
com::sun::star::lang::NullPointerException | if InspectorUI is NULL |
void addPropertyChangeListener | ( | [in] com::sun::star::beans::XPropertyChangeListener | Listener | ) | |
raises | ( | com::sun::star::lang::NullPointerException | |||
) |
registers a listener for notification about property value changes
An XPropertyHandler implementation might decide to ignore this call. However, in this case property value changes made by third party components are not reflected in the object inspector.
If a handler implementation supports property change listeners, it must be able to cope with a call to addPropertyChangeListener() even if currently no component is being inspected. In this case, the listener must become active as soon as a new introspection is set in the next inspect() call.
Listener | the listener to notify about property changes |
com::sun::star::lang::NullPointerException | if the listener is NULL |
any convertToControlValue | ( | [in] string | PropertyName, |
[in] any | PropertyValue, | ||
[in] type | ControlValueType | ||
) | |||
raises | ( | ::com::sun::star::beans::UnknownPropertyException | |
) |
converts a given property value to a control-compatible value
In describePropertyLine(), a property handler declared which type of control should be used to display the value of a certain property. To allow to use the same control type for different properties, and in particular, for properties of different type, conversions between controls values and property values are needed.
This method converts a property value, which has previously been obtained using getPropertyValue(), into a control-compatible value, which can be used with XPropertyControl's XPropertyControl::Value attribute.
A usual application of this method are list boxes: There is a generic list box implementation, which is able to display a simple list of strings. Usually, every string represents one possible property value. To translate between those property values and the displayed strings, convertToControlValue() and convertToPropertyValue() are used.
The method is not invoked if the control's value type (XPropertyControl::ValueType equals the property's value type.
PropertyName | The name of the property whose value is to be converted. |
PropertyValue | The to-be-converted property value. |
ControlValueType | The target type of the conversion. This type is determined by the control which is used to display the property, which in turn is determined by the handler itself in describePropertyLine(). Speaking strictly, this is passed for convenience only, since every XPropertyHandler implementation should know exactly which type to expect, since it implicitly determined this type in describePropertyLine() by creating an appropriate XPropertyControl. |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
any convertToPropertyValue | ( | [in] string | PropertyName, |
[in] any | ControlValue | ||
) | |||
raises | ( | ::com::sun::star::beans::UnknownPropertyException | |
) |
converts a given control-compatible value to a property value
In describePropertyLine(), a property handler declared which type of control should be used to display the value of a certain property. To allow to use the same control type for different properties, and in particular, for properties of different type, conversions between controls values and property values are needed.
This method converts a control value into a property value, which subsequently can be used in conjunction with setPropertyValue().
PropertyName | The name of the conversion's target property. |
ControlValue | The to-be-converted control value. This value has been obtained from an XPropertyControl, using its XPropertyControl::Value attribute. |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
LineDescriptor describePropertyLine | ( | [in] string | PropertyName, |
[in] XPropertyControlFactory | ControlFactory | ||
) | |||
raises | ( | ::com::sun::star::beans::UnknownPropertyException, | |
::com::sun::star::lang::NullPointerException | |||
) |
describes the UI to be used to represent the property
PropertyName | the name of the property whose user interface is to be described implementation |
ControlFactory | a factory for creating XPropertyControl instances. Must not be NULL . |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by this handler |
com::sun::star::lang::NullPointerException | if ControlFactory is NULL . |
sequence< string > getActuatingProperties | ( | ) |
retrieve the actuating properties which this handler is interested in
In general, properties can be declared as "actuating", that is, when their value changes, the UI for other properties needs to be updated (e.g. enabled or disabled).
With this method, a handler can declare that it feels responsible for some/all of the depending properties of certain actuating properties.
Whenever the value of an actuating property changes, all handlers which expressed their interest in this particular actuating properties are called with their actuatingPropertyChanged() method.
If getSupportedProperties() returned an empty sequence, this method will not be called
com::sun::star::beans::PropertyState getPropertyState | ( | [in] string | PropertyName | ) | |
raises | ( | ::com::sun::star::beans::UnknownPropertyException | |||
) |
returns the state of a property
PropertyName | the name of the property whose state is to be retrieved |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
any getPropertyValue | ( | [in] string | PropertyName | ) | |
raises | ( | ::com::sun::star::beans::UnknownPropertyException | |||
) |
retrieves the current value of a property
PropertyName | the name of the property whose value is to be retrieved |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
sequence< string > getSupersededProperties | ( | ) |
returns the properties which are to be superseded by this handler
Besides defining an own set of properties (see getSupportedProperties()), a property handler can also declare that foreign properties (which it is not responsible for) are superseded by its own properties.
This is usually used if your handler is used with another, more generic one, which should continue to be responsible for all properties, except a few which your handler handles more elegantly.
In such a case, simply return those properties here.
There is a precedence in the property handlers used by an ObjectInspector, which also is important for the superseded properties. This precedence is implied by the precedence of factories to create the property handlers, as denoted in the XObjectInspectorModel::HandlerFactories attribute.
With this in mind, property handlers can only supersede properties which are supported by a handler preceding them, but not properties of handlers succeeding them.
For instance, imaging an XObjectInspectorModel which provides three factories, for handler A
, B
, and C
- in this order. Now if A
supports the property Foo
, C
supports Bar
, and B
supersedes both Foo
and Bar
, them the result is Bar
is still present. This is because B
precedes C
, so it cannot, by definition, supersede properties which are supported by C
.
If getSupportedProperties() returned an empty sequence, this method will not be called.
sequence< com::sun::star::beans::Property > getSupportedProperties | ( | ) |
returns the properties which the handler can handle
A handler is allowed to return an empty sequence here, indicating that for the given introspection, no properties handling can be provided. This might happen when a fixed set of property handlers is used for a variety of components to inspect, where not all handlers can really cope with all components.
In the case of returning an empty sequence here, the property handler is ignored by all further processing in the object inspector.
void inspect | ( | [in] com::sun::star::uno::XInterface | Component | ) | |
raises | ( | com::sun::star::lang::NullPointerException | |||
) |
binds the property handler to a new component
Component | the component to inspect. Must not be NULL |
com::sun::star::lang::NullPointerException | if the component is NULL |
boolean isComposable | ( | [in] string | PropertyName | ) | |
raises | ( | ::com::sun::star::beans::UnknownPropertyException | |||
) |
determines whether a given property, which the handler is responsible for, is composable.
An object inspector can inspect multiple components at once, displaying the intersection of their properties. For this, all components are examined for their properties, and all properties which exist for all components, and are declared to be composable by their respective handler, are displayed in the inspector UI.
PropertyName | the name of the property whose composability is to be determined |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
::com::sun::star::inspection::InteractiveSelectionResult onInteractivePropertySelection | ( | [in] string | PropertyName, |
[in] boolean | Primary, | ||
[out] any | outData, | ||
[in] XObjectInspectorUI | InspectorUI | ||
) | |||
raises | ( | ::com::sun::star::beans::UnknownPropertyException, | |
::com::sun::star::lang::NullPointerException | |||
) |
called when a browse button belonging to a property UI representation has been clicked
Property handlers can raise a dedicated UI for entering or somehow changing a property value. Usually, this will be a modal dialog, but it can also be a non-modal user interface component.
Availability of this feature is indicated by the LineDescriptor::HasPrimaryButton and LineDescriptor::HasSecondaryButton members of a LineDescriptor, which the XPropertyHandler fills in its describePropertyLine() method.
When this method is called, the property handler should raise the UI needed to enter the property value, and return the result of this (see InteractiveSelectionResult).
It is recommended that property handlers do not directly set the property value which has been obtained from the user, but store it in the output-parameter Data, and return InteractiveSelectionResult::ObtainedValue.
If a handler sets the new property value directly, and returns InteractiveSelectionResult::ObtainedValue, this implies that the property cannot properly be handled in case the object inspector is inspecting an intersection of multiple components, since in this case onInteractivePropertySelection() will be called at one handler only, however the new property would have to be forwarded to all handlers.
If a property is not composable, directly setting the new property value does not yield any problem, as long as property listeners are properly notified of the change.
PropertyName | The name of the property whose browse button has been clicked |
Primary | TRUE if and only if the primary button has been clicked, FALSE otherwise |
outData | If the method returns InteractiveSelectionResult::ObtainedValue, then outData contains the value which has been interactively obtained from the user, and which still needs to be set at the inspected component. |
InspectorUI | provides access to the object inspector UI. Implementations should use this if the property selection requires non-modal user input. In those cases, onInteractivePropertySelection() should return InteractiveSelectionResult::Pending, and the UI for (at least) the property whose input is still pending should be disabled. |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
com::sun::star::lang::NullPointerException | if InspectorUI is NULL |
void removePropertyChangeListener | ( | [in] com::sun::star::beans::XPropertyChangeListener | Listener | ) |
revokes a listener for notification about property value changes
void setPropertyValue | ( | [in] string | PropertyName, |
[in] any | Value | ||
) | |||
raises | ( | ::com::sun::star::beans::UnknownPropertyException, | |
::com::sun::star::beans::PropertyVetoException | |||
) |
sets the value of a property
PropertyName | the name of the property whose value is to be set |
Value | the property value to set |
com::sun::star::beans::UnknownPropertyException | if the given property is not supported by the property handler |
boolean suspend | ( | [in] boolean | Suspend | ) |
suspends the handler
A XPropertyHandler is used by a XObjectInspector instance, which implements the XController interface. By definition, a XObjectInspector always forwards all suspend requests (com::sun::star::frame::XController::suspend()) to all its handlers.
The usual use case for this method are non-modal user interface components used for property value input. Such a component might have been opened during onInteractivePropertySelection(). If a property handler receives a suspend() call, it should forward the suspension request to the UI component, and veto suspension of the XObjectInspector as appropriate.
If suspension is not to be vetoed, then all non-modal UI components opened by the handler should have been closed when it returns from the suspend() call.
Suspend | Whether the handler is to be suspended TRUE or reactivated (FALSE ). The latter happens if a handler was successfully suspended, but an external instance vetoed the whole suspension process. |
TRUE
if the handler does allow suspension, FALSE
if it vetoes it.