| /************************************************************** |
| * |
| * 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 INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX |
| #define INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX |
| |
| #include <sal/config.h> |
| #include <boost/shared_ptr.hpp> |
| |
| |
| /* Definition of AnimationFunction interface */ |
| |
| namespace slideshow |
| { |
| namespace internal |
| { |
| /** Interface describing an abstract animation function. |
| |
| Use this interface to model time-dependent animation |
| functions of one variable. |
| */ |
| class AnimationFunction |
| { |
| public: |
| virtual ~AnimationFunction() {} |
| |
| /** Operator to calculate function value. |
| |
| This method calculates the function value for the |
| given time instant t. |
| |
| @param t |
| Current time instant, must be in the range [0,1] |
| |
| @return the function value, typically in relative |
| user coordinate space ([0,1] range). |
| */ |
| virtual double operator()( double t ) const = 0; |
| |
| }; |
| |
| typedef ::boost::shared_ptr< AnimationFunction > AnimationFunctionSharedPtr; |
| |
| } |
| } |
| |
| #endif /* INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX */ |