Framework/Tutorial/Accelerators
This tutorial will give you a detailed step-by-step insight into accelerators in OpenOffice.org. Everybody is invited to participate. May be someone wants to translate the extension to a different language (e.g. Java or Python) or wants to have more information about a specific topic. You can set a link to this page, if you think that this page adds valuable information.
The reader of this tutorial should know the following
* Programming with UNO * C++/Java knowledge (Using C++/Java with the SDK) * How to create an extension with the "OpenOffice.org SDK"
General abstract of the OpenOffice.org accelerator concept
Accelerator architecture
OpenOffice.org accelerators are available and stored on three different layers which have a pre-defined priority. The layers are:
Priority of the different accelerator layers | |
---|---|
1. | Document based accelerators |
2. | Module based accelerators |
3. | Global based accelerators |
If a user presses a possible keyboard shorcut the framework implementation starts to check every layer (using the pre-defined order document, module, global) for a matching entry. If there is match the associated command URL is used to find a dispatch object where the command can be executed. If no matching entry has been found the current application module is asked to process the keyboard event.
How to access the different accelerator layers
Global Accelerator Manager
The global accelerator manager can be directly created by using the OpenOffice.org service manager. The service name of the global accelerator manager is called com.sun.star.ui.GlobalAcceleratorManager. This service provides just one interface where accelerators can be retrieved, changes and removed.
module com { module sun { module star { module ui { //----------------------------------------------- /** provides access to the global shortcut configuration set. <p> The GlobalAcceleratorConfiguration service can be created by using an UNO service manager. It provides then access to the global accelerator configuration.</p> @since OOo 2.0.0 */ service GlobalAcceleratorConfiguration : XAcceleratorConfiguration {}; }; }; }; }; // com.sun.star #endif
Module Accelerator Manager
A module accelerator manager must be created via the one-instance service service com.sun.star.ui.ModuleUIConfigurationManagerSupplier.
module com { module sun { module star { module ui { /** allows to retrieve user interface configuration managers related to OpenOffice.org modules. @since OOo 2.0.0 */ interface XModuleUIConfigurationManagerSupplier : ::com::sun::star::uno::XInterface { //---------------------------------------------------------------------- /** returns the requested module based user interface configuration manager. @param ModuleIdentifier a module identifier which identifies an OpenOffice.org module. The module identifier can be retrieved from the <type scope=com::sun::star::frame>ModuleManager</type> service. @returns an object implementing <type scope="::com::sun::star::ui">ModuleUIConfigurationManager</type> service. If the provided module identifier is unknown a <type scope="com::sun::star::container">NoSuchElementException</type> is thrown. */ XUIConfigurationManager getUIConfigurationManager( [in] string ModuleIdentifier ) raises ( com::sun::star::container::NoSuchElementException ); }; //============================================================================= }; }; }; };
This service provides access to the module specific ui configuration managers via the method
Document Accelerator Manager
Using an Accelerator Manager to retrieve or manipulate accelerators
module com { module sun { module star { module ui { //----------------------------------------------- /** provides read/write access to an accelerator configuration set. <p> Such configuration set base on:<br> <ul> <li>Key events structure</li> <li>and Commands, which are represented as URLs; describing a function, which and can be executed using the dispatch API.</li> </ul> </p> <p> Note further:<br> All changes you made on this configration access modify the the configuration set inside memory only. You have to use the <type scope="com::sun::star::util">XFlushable</type> interface (which must be available at the same implementation object too), to make it persistent. </p> @see AcceleratorConfiguration @see <type scope="dom::sun::star::util">XFlushable</type> @since OOo 2.0.0 */ interface XAcceleratorConfiguration { //------------------------------------------- /** return the list of all key events, which are available at this configration set. <p> The key events are the "primary keys" of this configuration sets. Means: Commands are registerd for key events. </p> <p> Such key event can be mapped to its bound command, using the method getCommandForKeyEvent(). </p> @see getCommandForKeyEvent(). @return A list of key events. */ sequence< com::sun::star::awt::KeyEvent > getAllKeyEvents(); //------------------------------------------- /** return the registered command for the specified key event. <p> This function can be used to:<br> <ul> <li>by a generic service, which can execute commands if a keyboard event occures.</li> <li>or to iterate over the whole container and change some accelerator bindings.</li> </ul> </p> @param aKeyEvent the key event, where the registered command is searched for. @return The registered command for the specified key event. @throws ::com::sun::star::container::NoSuchElementException if the key event is an invalid one or does not exists inside this configuration set. */ string getCommandByKeyEvent( [in] com::sun::star::awt::KeyEvent aKeyEvent ) raises(com::sun::star::container::NoSuchElementException); //------------------------------------------- /** modify or create a key - command - binding. <p> If the specified key event does not already exists inside this configuration access, it will be created and the command will be registered for it. </p> <p> If the specified key event already exists, its command will be overwritten with the new command. There is no warning nor any error about that! The outside code has to use the method getCommandForKeyEvent() to check for possible collisions. </p> <p> Note: This method cant be used to remove entities from the configuration set. Empty parameters will result into an exception! Use the method removeKeyEvent() instead. </p> @see removeKeyEvent() @param aKeyEvent specify the key event, which must be updated or new created. @param sCommand the new command for the specified key event. @throws ::com::sun::star::lang::IllegalArgumentException if the key event isnt a valid one. Commands can be checked only, if they are empty. Because every URL schema can be used by commands in general, so its not possible to validate it. */ void setKeyEvent( [in] com::sun::star::awt::KeyEvent aKeyEvent, [in] string sCommand ) raises(com::sun::star::lang::IllegalArgumentException); //------------------------------------------- /** remove a key-command-binding from this configuration set. @param aKeyEvent the key event, which should be removed. @throws ::com::sun::star::container::NoSuchElementException if the key event does not exists inside this configuration set. */ void removeKeyEvent( [in] com::sun::star::awt::KeyEvent aKeyEvent ) raises(com::sun::star::container::NoSuchElementException); //------------------------------------------- /** optimized access to the relation "command-key" instead of "key-command" which is provided normaly by this interface. <p> It can be used to implement collision handling, if more then one key event match to the same command. The returned list contains all possible key events - and the outside code can select an possible one. Of course - mostly this list will contain only one key event ... </p> @param sCommand the command, where key bindings are searched for. @return A list of <type scope="com::sun::star::awt">KeyEvent</type> structures, where the pecified command is registered for. @throws ::com::sun::star::lang::IllegalArgumentException if the specified command is empty. It cant be checked, if a command is valid - because every URL schema can be used here. @throws ::com::sun::star::container::NoSuchElementException if the specified command isnt empty but does not occure inside this configuration set. */ sequence< com::sun::star::awt::KeyEvent > getKeyEventsByCommand( [in] string sCommand ) raises(com::sun::star::lang::IllegalArgumentException , com::sun::star::container::NoSuchElementException); //------------------------------------------- /** optimized function to map a list of commands to a corresponding list of key events. <p> It provides a fast mapping, which is e.g. needed by a menu or toolbar implementation. E.g. a sub menu is described by a list of commands - and the implementation of the menu must show the corresponding shortcuts. Iteration over all items of this configuration set can be very expensive. </p> <p> Instead to the method getKeyEventsForCommand() the returned list contains only one(!) key event bound to one(!) requested command. If more then one key event is bound to a command - a selection is done inside this method. This internal selection cant be influenced from outside. </p> @attention Because its not defined, that any command (e.g. configured inside a menu) must have an accelerator - we cant reject the call if at least one command does not occure inside this configuration set ... We handle it more gracefully - and return an empty item instead of throwing and exception. @param lCommandList a list of commands @return A (non packed!) list of key events, where every item match by index directly to a command of the specified <var>CommandList</var>. If a command does not exists inside this configuration set, the corresponding any value will be empty. @throws ::com::sun::star::lang::IllegalArgumentException if at least one of the specified commands is empty. It cant be checked, if a command is valid - because every URL schema can be used here. */ sequence< any > getPreferredKeyEventsForCommandList( [in] sequence< string > lCommandList ) raises(com::sun::star::lang::IllegalArgumentException); //------------------------------------------- /** search for an key-command-binding inside this configuration set, where the specified command is used. <p> If such binding could be located, the command will be removed from it. If as result of that the key binding will be empty, if will be removed too. </p> <p> This is an optimized method, which can perform removing of commands from this configuration set. Because normaly Commands are "foreign keys" and key identifier the "primary keys" - it needs some work to remove all commands outside this container ... </p> @param sCommand the command, which should be removed from any key binding. @throws ::com::sun::star::lang::IllegalArgumentException if the specified command is empty. @throws ::com::sun::star::container::NoSuchElementException if the specified command isnt used inside this configuration set. */ void removeCommandFromAllKeyEvents( [in] string sCommand ) raises(com::sun::star::lang::IllegalArgumentException , com::sun::star::container::NoSuchElementException); //------------------------------------------- /** specifies a persistence interface which supports to load/store accelerator configuration data to a storage and to retrieve information about the current state. */ interface com::sun::star::ui::XUIConfigurationPersistence; //------------------------------------------- /** connects this configuration to a new storage which must be used further on subsequent calls of <type scope="com::sun::star::util::">XConfigurationPersistence.load()</type> and <type scope="com::sun::star::util::">XConfigurationPersistence.store()</type>. */ interface com::sun::star::ui::XUIConfigurationStorage; //------------------------------------------- /** supports to notify other implementations about changes of this accelerator configuration. */ interface com::sun::star::ui::XUIConfiguration; }; // interface XAcceleratorConfiguration }; }; }; }; // com.sun.star
Sample Code
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// Create the global accelerator configuration service Reference< com::sun::star::ui::XacceleratorConfiguration > xGlobalAccelCfg( m_xServiceManager->createInstance( ::rtl::OUString("com.sun.star.ui.GlobalAcceleratorConfiguration")), UNO_QUERY_THROW ); // set key event to define the accelerator com::sun:star::awt::KeyEvent aKeyEvent; aKeyEvent.KeyCode = com::sun::star::awt::Key::S; aKeyEvent.Modifiers = com::sun::star::awt::KeyModifier::SHIFT| com::sun::star::awt::KeyModifier::MOD1; // associate the accelerator with a command xGlobalAccelCfg->setKeyEvent(aKeyEvent, rtl::OUString::createFromAscii(“.uno:Open”)); // store the changes in the configuration xGlobalAccelCfg->store();