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/**************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
#ifndef SD_VIEW_SHELL_FACTORY_HXX
#define SD_VIEW_SHELL_FACTORY_HXX
#include <sal/types.h>
#include <memory>
class Window;
namespace sd {
class FrameView;
class ViewShell;
typedef sal_Int32 ShellId;
// This shell id is a reserved value and does not specify any valid shell.
static const sal_Int32 snInvalidShellId = -1;
template<class ShellType>
class ShellFactory
{
public:
/** This abstract virtual class needs a destructor so that the
destructors of derived classes are called.
*/
virtual ~ShellFactory (void) {};
/** Create a new instance of a view shell for the given id that will
be stacked onto the given view shell base.
@return
Return the new view shell or NULL when a creation is not
possible.
*/
virtual ShellType* CreateShell (
ShellId nId,
::Window* pParentWindow,
FrameView* pFrameView = NULL) = 0;
/** Tell the factory that a shell is no longer in use. It may destroy
it or put it for future use in a cache.
*/
virtual void ReleaseShell (ShellType* pShell) = 0;
};
} // end of namespace sd
#endif
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