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 
GetTrackThickness()39     float GetTrackThickness() const
40     {
41         return trackThickness_;
42     }
43 
GetBlockSize()44     SizeF GetBlockSize() const
45     {
46         return blockSize_;
47     }
48 
GetBlockHotSize()49     SizeF GetBlockHotSize() const
50     {
51         return blockHotSize_;
52     }
53 
54 private:
55     void CalculateBlockOffset(
56         LayoutWrapper* layoutWrapper, const RectF& contentRect, float selectOffset, Axis axis, bool reverse);
57     SizeF CalculateHotSize(LayoutWrapper* layoutWrapper, const SizeF& blockSize, float themeBlockHotSize);
58     void GetStyleThemeValue(LayoutWrapper* layoutWrapper, Dimension& themeTrackThickness, Dimension& themeBlockSize,
59         Dimension& hotBlockShadowWidth, Dimension& themeBlockHotSize);
60     float CalculateSliderWidth(
61         float width, float height, Axis direction, const Dimension& hotBlockShadowWidth, SliderModel::SliderMode mode);
62 
63 private:
64     float trackThickness_ = 0.0f;
65     SizeF blockSize_;
66     SizeF blockHotSize_;
67 
68     ACE_DISALLOW_COPY_AND_MOVE(SliderLayoutAlgorithm);
69 };
70 } // namespace OHOS::Ace::NG
71 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_SLIDER_SLIDER_LAYOUT_ALGORITHM_H
72