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Smooth scrolling (#14562)

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grorp 2024-04-28 00:14:31 +02:00 • committed by GitHub
parent 05d5dc4cec
commit 73dbd2f0ab
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5 changed files with 105 additions and 44 deletions
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23
src/gui/guiScrollBar.h
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@ -13,6 +13,7 @@ the arrow buttons where there is insufficient space.
#pragma once
#include "irrlichttypes_extrabloated.h"
#include <optional>
class ISimpleTextureSource;
@ -33,21 +34,30 @@ public:
DEFAULT
};
virtual void draw();
virtual void updateAbsolutePosition();
virtual bool OnEvent(const SEvent &event);
virtual void draw() override;
virtual void updateAbsolutePosition() override;
virtual bool OnEvent(const SEvent &event) override;
virtual void OnPostRender(u32 time_ms) override;
s32 getMax() const { return max_pos; }
s32 getMin() const { return min_pos; }
s32 getLargeStep() const { return large_step; }
s32 getSmallStep() const { return small_step; }
s32 getPos() const;
s32 getTargetPos() const;
void setMax(const s32 &max);
void setMin(const s32 &min);
void setSmallStep(const s32 &step);
void setLargeStep(const s32 &step);
//! Sets a position immediately, aborting any ongoing interpolation.
// setPos does not send EGET_SCROLL_BAR_CHANGED events for you.
void setPos(const s32 &pos);
//! Sets a target position for interpolation.
// If you want to do an interpolated addition, use
// setPosInterpolated(getTargetPos() + x).
// setPosInterpolated takes care of sending EGET_SCROLL_BAR_CHANGED events.
void setPosInterpolated(const s32 &pos);
void setPageSize(const s32 &size);
void setArrowsVisible(ArrowVisibility visible);
@ -79,4 +89,11 @@ private:
video::SColor current_icon_color;
ISimpleTextureSource *m_tsrc;
void setPosRaw(const s32 &pos);
void updatePos();
std::optional<s32> target_pos;
u32 last_time_ms = 0;
u32 last_delta_ms = 17; // assume 60 FPS
void interpolatePos();
};