1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SCROLL_EFFECT_SCROLL_FADE_EFFECT_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SCROLL_EFFECT_SCROLL_FADE_EFFECT_H 18 19 #include "base/utils/macros.h" 20 #include "core/components_ng/pattern/scroll/scroll_edge_effect.h" 21 #include "core/components_ng/pattern/scroll/effect/scroll_fade_controller.h" 22 #include "core/components_ng/pattern/scroll/effect/scroll_fade_painter.h" 23 24 namespace OHOS::Ace::NG { 25 class ACE_EXPORT ScrollFadeEffect final : public ScrollEdgeEffect { 26 DECLARE_ACE_TYPE(ScrollFadeEffect, ScrollEdgeEffect); 27 28 public: 29 explicit ScrollFadeEffect(const Color& color = Color::GRAY) ScrollEdgeEffect(EdgeEffect::FADE)30 : ScrollEdgeEffect(EdgeEffect::FADE), fadeColor_(color) {} 31 ~ScrollFadeEffect() override = default; 32 GetFadeColor()33 const Color& GetFadeColor() const 34 { 35 return fadeColor_; 36 } 37 38 void InitialEdgeEffect() override; 39 double CalculateOverScroll(double oldPosition, bool isReachMax) override; 40 void Paint(RSCanvas& canvas, const SizeF& viewPort, const OffsetF& offset) override; 41 void HandleOverScroll(Axis axis, float overScroll, const SizeF& viewPort) override; 42 void SetHandleOverScrollCallback(const HandleOverScrollCallback& callback) override; 43 44 private: 45 void ResetFadeEffect(const Color& color); 46 void SetOpacityAndScale(float opacity, float scale); 47 void SetPaintDirection(Axis axis, float overScroll); 48 49 Color fadeColor_ = Color::GRAY; 50 RefPtr<ScrollFadePainter> fadePainter_; 51 RefPtr<ScrollFadeController> fadeController_; 52 HandleOverScrollCallback handleOverScrollCallback_ = nullptr; 53 }; 54 } // namespace OHOS::Ace::NG 55 56 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERNS_SCROLL_EFFECT_SCROLL_FADE_EFFECT_H 57