src/constraints/scrolling/scroll_bar_constraint_proxy.cpp

#include "rive/constraints/scrolling/scroll_bar_constraint.hpp"
#include "rive/constraints/scrolling/scroll_bar_constraint_proxy.hpp"
#include "rive/math/vec2d.hpp"

using namespace rive;

bool ThumbDraggableProxy::drag(Vec2D mousePosition, float timeStamp)
{
    m_constraint->dragThumb(mousePosition - m_lastPosition, timeStamp);
    m_lastPosition = mousePosition;
    return true;
}

bool ThumbDraggableProxy::startDrag(Vec2D mousePosition, float timeStamp)
{
    m_lastPosition = mousePosition;
    auto scroll = m_constraint->scrollConstraint();
    scroll->isScrollBarDragging(true);
    if (scroll->physics() != nullptr)
    {
        scroll->physics()->accumulate(Vec2D(), timeStamp);
    }
    return true;
}

bool ThumbDraggableProxy::endDrag(Vec2D mousePosition, float timeStamp)
{
    auto scroll = m_constraint->scrollConstraint();
    scroll->isScrollBarDragging(false);
    scroll->clearVelocity();
    return true;
}

bool TrackDraggableProxy::startDrag(Vec2D mousePosition, float timeStamp)
{
    m_constraint->hitTrack(mousePosition);
    return true;
}