51f714de0f
The goal was to let finger flicks that didn't qualify as panning commands cancel momentum scrolling. The final effect is that any click does, which is fine.
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
#pragma once
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#include "Panel.h"
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#include <optional>
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#include <array>
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namespace ui
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{
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class ScrollPanel: public Panel
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{
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void CancelPanning();
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protected:
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int scrollBarWidth;
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Point maxOffset;
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float offsetX;
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float offsetY;
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float yScrollVel;
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float xScrollVel;
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bool isMouseInsideScrollbar;
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bool isMouseInsideScrollbarArea;
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bool scrollbarSelected;
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int scrollbarInitialYOffset;
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int scrollbarInitialYClick;
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int scrollbarClickLocation;
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int initialOffsetY;
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bool panning = false;
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static constexpr int PanOffsetThreshold = 10;
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static constexpr int PanHistorySize = 5;
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struct PanPoint
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{
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float offsetY;
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unsigned int ticks;
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};
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std::array<std::optional<PanPoint>, PanHistorySize> panHistory;
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public:
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ScrollPanel(Point position, Point size);
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int GetScrollLimit();
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void SetScrollPosition(int position);
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void Draw(const Point& screenPos) override;
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void XTick(float dt) override;
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void XOnMouseWheelInside(int localx, int localy, int d) override;
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void XOnMouseDown(int localx, int localy, unsigned int button) override;
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void XOnMouseUp(int x, int y, unsigned int button) override;
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void XOnMouseMoved(int localx, int localy) override;
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};
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}
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