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;
}