blob: 43e6d7f96eb4141ba49898e2ce1f384debe79658 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
#pragma once
#include "RenderObject.hpp"
#include "cru/platform/graph/util/Painter.hpp"
namespace cru::ui::render {
class ScrollRenderObject : public RenderObject {
public:
ScrollRenderObject() : RenderObject(ChildMode::Single) {}
CRU_DELETE_COPY(ScrollRenderObject)
CRU_DELETE_MOVE(ScrollRenderObject)
~ScrollRenderObject() override = default;
RenderObject* HitTest(const Point& point) override;
// Return the coerced scroll offset.
Point GetScrollOffset();
void SetScrollOffset(const Point& offset);
Point GetRawScrollOffset() const { return scroll_offset_; }
protected:
void OnDrawCore(platform::graph::IPainter* painter) override;
// Logic:
// If available size is bigger than child's preferred size, then child's
// preferred size is taken.
// If not, all available size is taken while forming a scroll area.
Size OnMeasureContent(const MeasureRequirement& requirement,
const MeasureSize& preferred_size) override;
void OnLayoutContent(const Rect& content_rect) override;
private:
Point scroll_offset_;
};
} // namespace cru::ui::render
|
