1 /* 2 * Copyright (c) 2022-2023 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_PATTERN_SLIDER_SLIDER_LAYOUT_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_SLIDER_SLIDER_LAYOUT_ALGORITHM_H 18 19 #include "base/geometry/ng/offset_t.h" 20 #include "base/geometry/ng/rect_t.h" 21 #include "core/components_ng/layout/box_layout_algorithm.h" 22 #include "core/components_ng/pattern/slider/slider_model.h" 23 24 namespace OHOS::Ace::NG { 25 26 // SliderLayoutAlgorithm acts as the underlying slider layout. 27 class ACE_EXPORT SliderLayoutAlgorithm : public BoxLayoutAlgorithm { 28 DECLARE_ACE_TYPE(SliderLayoutAlgorithm, BoxLayoutAlgorithm); 29 30 public: 31 explicit SliderLayoutAlgorithm() = default; 32 ~SliderLayoutAlgorithm() override = default; 33 34 std::optional<SizeF> MeasureContent( 35 const LayoutConstraintF& contentConstraint, LayoutWrapper* layoutWrapper) override; 36 void Measure(LayoutWrapper* layoutWrapper) override; 37 void Layout(LayoutWrapper* layoutWrapper) override; 38 39 private: 40 void CalculateBlockOffset( 41 LayoutWrapper* layoutWrapper, const RectF& contentRect, float selectOffset, Axis axis, bool reverse); 42 void CalculatePrefixOffset( 43 LayoutWrapper* layoutWrapper, const RectF& contentRect, float borderBlank, Axis axis, bool reverse); 44 void CalculateSuffixOffset( 45 LayoutWrapper* layoutWrapper, const RectF& contentRect, float borderBlank, Axis axis, bool reverse); 46 SizeF CalculateHotSize(LayoutWrapper* layoutWrapper, const SizeF& blockSize, float themeBlockHotSize); 47 void GetStyleThemeValue(LayoutWrapper* layoutWrapper, Dimension& themeTrackThickness, Dimension& themeBlockSize, 48 Dimension& hotBlockShadowWidth, Dimension& themeBlockHotSize); 49 float CalculateSliderWidth( 50 float width, float height, Axis direction, const Dimension& hotBlockShadowWidth, SliderModel::SliderMode mode); 51 float CalculateSliderLength(float width, float height, Axis direction, SliderModel::SliderMode mode, bool Ends); 52 void SetChildConstraint(RefPtr<LayoutWrapper> child, float maxWidth, float maxHeight); 53 std::optional<NG::LayoutPolicyProperty> GetLayoutPolicy(LayoutWrapper* layoutWrapper); 54 55 private: 56 float trackThickness_ = 0.0f; 57 SizeF blockSize_; 58 SizeF blockHotSize_; 59 float maxWidth = 0.0f; 60 float maxHeight = 0.0f; 61 float langRatio = 0.1; 62 float shortRatio = 0.7; 63 64 ACE_DISALLOW_COPY_AND_MOVE(SliderLayoutAlgorithm); 65 }; 66 } // namespace OHOS::Ace::NG 67 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_SLIDER_SLIDER_LAYOUT_ALGORITHM_H 68