AOO410/main/framework/inc/helper/otasksaccess.hxx

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#ifndef __FRAMEWORK_HELPER_OTASKSACCESS_HXX_
#define __FRAMEWORK_HELPER_OTASKSACCESS_HXX_

//_________________________________________________________________________________________________________________
//	my own includes
//_________________________________________________________________________________________________________________

#include <classes/framecontainer.hxx>
#include <threadhelp/threadhelpbase.hxx>
#include <macros/generic.hxx>
#include <macros/xinterface.hxx>
#include <macros/xtypeprovider.hxx>
#include <macros/debug.hxx>

//_________________________________________________________________________________________________________________
//	interface includes
//_________________________________________________________________________________________________________________
#include <com/sun/star/container/XEnumerationAccess.hpp>
#include <com/sun/star/container/XElementAccess.hpp>
#include <com/sun/star/container/XEnumeration.hpp>
#include <com/sun/star/frame/XDesktop.hpp>

//_________________________________________________________________________________________________________________
//	other includes
//_________________________________________________________________________________________________________________
#include <cppuhelper/weak.hxx>
#include <cppuhelper/weakref.hxx>

//_________________________________________________________________________________________________________________
//	namespace
//_________________________________________________________________________________________________________________

namespace framework{

//_________________________________________________________________________________________________________________
//	exported const
//_________________________________________________________________________________________________________________

//_________________________________________________________________________________________________________________
//	exported definitions
//_________________________________________________________________________________________________________________

/*-************************************************************************************************************//**
	@short			implement XEnumerationAccess interface as helper to create many oneway enumeration of tasks
	@descr			We share mutex and framecontainer with ouer owner and have full access to his child tasks.
					(Ouer owner can be the Desktop only!) We create oneway enumerations on demand. These "lists"
					can be used for one time only. Step during the list from first to last element.
					(The type of created enumerations is OTasksEnumeration.)

	@implements		XInterface
					XEnumerationAccess
					XElementAccess

	@base			OWeakObject

	@devstatus		deprecated
*//*-*************************************************************************************************************/

class OTasksAccess	:	public css::lang::XTypeProvider				,
						public css::container::XEnumerationAccess	,	// => XElementAccess
                        private ThreadHelpBase                      ,
						public ::cppu::OWeakObject
{
	//-------------------------------------------------------------------------------------------------------------
	//	public methods
	//-------------------------------------------------------------------------------------------------------------

	public:

		//---------------------------------------------------------------------------------------------------------
		//	constructor / destructor
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		constructor to initialize this instance
			@descr		A desktop will create an enumeration-access-object. An enumeration is a oneway-list and a
						snapshot of the tasklist of current tasks of desktop.
						But we need a instance to create more then one enumerations to the same tasklist!

			@seealso	class Desktop
			@seealso	class OTasksEnumeration

			@param		"xOwner" is a reference to ouer owner and must be the desktop!
			@param		"pTasks" is a pointer to the taskcontainer of the desktop. We need it to create a new enumeration.
			@return		-

			@onerror	Do nothing and reset this object to default with an empty list.
		*//*-*****************************************************************************************************/

	 	OTasksAccess(	const	css::uno::Reference< css::frame::XDesktop >&	xOwner	,
                                FrameContainer*                                 pTasks  );

		//---------------------------------------------------------------------------------------------------------
		//	XInterface
		//---------------------------------------------------------------------------------------------------------

		DECLARE_XINTERFACE
		DECLARE_XTYPEPROVIDER

		//---------------------------------------------------------------------------------------------------------
		//	XEnumerationAccess
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		create a new enumeration of tasks
			@descr		You can call this method to get a new snapshot to all tasks of the desktop as an enumeration.

			@seealso	interface XEnumerationAccess
			@seealso	interface XEnumeration
			@seealso	class Desktop

			@param		-
			@return		If the desktop and some tasks exist => a valid reference to an enumeration<BR>
						An NULL-reference, other way.

			@onerror	-
		*//*-*****************************************************************************************************/

	    virtual css::uno::Reference< css::container::XEnumeration > SAL_CALL createEnumeration() throw( css::uno::RuntimeException );

		//---------------------------------------------------------------------------------------------------------
		//	XElementAccess
		//---------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		get the type of elements in enumeration
			@descr		-

			@seealso	interface XElementAccess
			@seealso	class TasksEnumeration

			@param		-
			@return		The uno-type XTask.

			@onerror	-
		*//*-*****************************************************************************************************/

		virtual css::uno::Type SAL_CALL getElementType() throw( css::uno::RuntimeException );

		/*-****************************************************************************************************//**
			@short		get state of tasklist of enumeration.
			@descr		-

			@seealso	interface XElementAccess

			@param		-
			@return		sal_True  ,if more then 0 elements exist.
			@return		sal_False ,otherwise.

			@onerror	-
		*//*-*****************************************************************************************************/

    	virtual sal_Bool SAL_CALL hasElements() throw( css::uno::RuntimeException );

	//-------------------------------------------------------------------------------------------------------------
	//	protected methods
	//-------------------------------------------------------------------------------------------------------------

	protected:

		/*-****************************************************************************************************//**
			@short		standard destructor
			@descr		This method destruct an instance of this class and clear some member.
						Don't use an instance of this class as normal member. Use it dynamicly with a pointer.
						We hold a weakreference to ouer owner and not to ouer superclass!
						Thats the reason for a protected dtor.

			@seealso	class Desktop

			@param		-
			@return		-

			@onerror	-
		*//*-*****************************************************************************************************/

		virtual	~OTasksAccess();

	//-------------------------------------------------------------------------------------------------------------
	//	private methods
	//-------------------------------------------------------------------------------------------------------------

	private:

	//-------------------------------------------------------------------------------------------------------------
	//	debug methods
	//	(should be private everyway!)
	//-------------------------------------------------------------------------------------------------------------

		/*-****************************************************************************************************//**
			@short		debug-method to check incoming parameter of some other mehods of this class
			@descr		The following methods are used to check parameters for other methods
						of this class. The return value is used directly for an ASSERT(...).

			@seealso	ASSERTs in implementation!

			@param		references to checking variables
			@return		sal_False ,on invalid parameter.
			@return		sal_True  ,otherwise

			@onerror	-
		*//*-*****************************************************************************************************/

	#ifdef ENABLE_ASSERTIONS

	private:

		static sal_Bool impldbg_checkParameter_OTasksAccessCtor(	const	css::uno::Reference< css::frame::XDesktop >&	xOwner	,
                                                                            FrameContainer*                                 pTasks  );

	#endif	// #ifdef ENABLE_ASSERTIONS

	//-------------------------------------------------------------------------------------------------------------
	//	variables
	//	(should be private everyway!)
	//-------------------------------------------------------------------------------------------------------------

	private:

		css::uno::WeakReference< css::frame::XDesktop >		m_xOwner			;	/// weak reference to the desktop object!
		FrameContainer*										m_pTasks			;	/// pointer to list of current tasks on desktop (is a member of class Desktop!)
																					/// This pointer is valid only, if weakreference can be locked.

};		//	class OTasksAccess

}		//	namespace framework

#endif	//	#ifndef __FRAMEWORK_HELPER_OTASKSACCESS_HXX_