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65 lines
1.8 KiB
65 lines
1.8 KiB
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <animation/SAnimation.h>
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namespace SOUI {
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/**
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* An animation that controls the alpha level of an object.
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* Useful for fading things in and out. This animation ends up
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* changing the alpha property of a {@link STransformation}
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*
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*/
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class SOUI_EXP SAlphaAnimation: public SAnimation {
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SOUI_CLASS_NAME(SAlphaAnimation, L"alpha")
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private:
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float mFromAlpha;
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float mToAlpha;
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public:
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SOUI_ATTRS_BEGIN()
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ATTR_FLOAT(L"fromAlpha",mFromAlpha,FALSE)
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ATTR_FLOAT(L"toAlpha", mToAlpha, FALSE)
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SOUI_ATTRS_END()
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/**
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* Constructor to use when building an AlphaAnimation from code
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*
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* @param fromAlpha Starting alpha value for the animation, where 1.0 means
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* fully opaque and 0.0 means fully transparent.
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* @param toAlpha Ending alpha value for the animation.
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*/
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public:
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SAlphaAnimation();
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void init(float fromAlpha = 0.0f, float toAlpha = 0.0f);
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protected:
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/**
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* Changes the alpha property of the supplied {@link STransformation}
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*/
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virtual void applyTransformation(float interpolatedTime, STransformation & t);
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virtual void copy(const IAnimation * src);
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public:
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/**
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* @hide
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*/
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virtual bool hasAlpha() const override;
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};
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}
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