1 /*
2  * Copyright (c) 2021 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 GRAPHIC_LITE_UI_ABSTRACT_SCROLL_BAR_H
17 #define GRAPHIC_LITE_UI_ABSTRACT_SCROLL_BAR_H
18 
19 #include "gfx_utils/rect.h"
20 #include "gfx_utils/style.h"
21 #include "gfx_utils/graphic_buffer.h"
22 
23 namespace OHOS {
24 class UIAbstractScrollBar : public HeapBase {
25 public:
26     UIAbstractScrollBar();
27 
~UIAbstractScrollBar()28     virtual ~UIAbstractScrollBar() {}
29 
SetPosition(int16_t x,int16_t y,int16_t width,int16_t height)30     virtual void SetPosition(int16_t x, int16_t y, int16_t width, int16_t height) {}
31 
OnDraw(BufferInfo & gfxDstBuffer,const Rect & invalidatedArea,uint8_t backgroundOpa)32     virtual void OnDraw(BufferInfo& gfxDstBuffer, const Rect& invalidatedArea, uint8_t backgroundOpa) {}
33 
SetScrollBarSide(uint8_t side)34     virtual void SetScrollBarSide(uint8_t side) {}
35 
SetScrollProgress(float scrollProgress)36     void SetScrollProgress(float scrollProgress)
37     {
38         scrollProgress_ = scrollProgress;
39     }
40 
SetForegroundProportion(float foregroundPropotion)41     void SetForegroundProportion(float foregroundPropotion)
42     {
43         if ((foregroundPropotion < 0) || (foregroundPropotion > 1.0f)) {
44             return;
45         }
46         foregroundProportion_ = foregroundPropotion;
47     }
48 
SetOpacity(uint8_t opacity)49     void SetOpacity(uint8_t opacity)
50     {
51         opacity_ = opacity;
52     }
53 
GetOpacity()54     uint8_t GetOpacity()
55     {
56         return opacity_;
57     }
58 
59 protected:
60     uint8_t opacity_ = OPA_OPAQUE;
61     float scrollProgress_ = 0;
62     float foregroundProportion_ = 0;
63     Style* backgroundStyle_ = nullptr;
64     Style* foregroundStyle_ = nullptr;
65 };
66 } // namespace OHOS
67 #endif // GRAPHIC_LITE_UI_ABSTRACT_SCROLL_BAR_H
68