bool ApplyScale(m2::PointD const & pixelScaleCenter, double factor, ScreenBase & screen)
{
m2::PointD const globalScaleCenter = screen.PtoG(screen.P3dtoP(pixelScaleCenter));
ScreenBase tmp = screen;
tmp.Scale(factor);
tmp.MatchGandP3d(globalScaleCenter, pixelScaleCenter);
if (!CheckMinScale(tmp))
return false;
m2::RectD const & worldR = df::GetWorldRect();
if (!CheckBorders(tmp))
{
if (CanShrinkInto(tmp, worldR))
tmp = ShrinkInto(tmp, worldR);
else
return false;
}
if (!CheckMaxScale(tmp))
return false;
// re-checking the borders, as we might violate them a bit (don't know why).
if (!CheckBorders(tmp))
tmp = ScaleInto(tmp, worldR);
screen = tmp;
return true;
}
void Navigator::DoDrag(m2::PointD const & pt, double /*timeInSec*/)
{
if (m_LastPt1 == pt)
return;
ScreenBase const s = ShrinkInto(m_StartScreen, m_scales.GetWorldRect());
double dx = pt.x - m_StartPt1.x;
double dy = pt.y - m_StartPt1.y;
ScreenBase tmp = s;
tmp.Move(dx, 0);
if (!CheckBorders(tmp))
dx = 0;
tmp = s;
tmp.Move(0, dy);
if (!CheckBorders(tmp))
dy = 0;
tmp = s;
tmp.Move(dx, dy);
if (CheckBorders(tmp))
{
m_StartScreen = tmp;
m_StartPt1 = pt;
m_LastPt1 = pt;
m_Screen = tmp;
}
}
bool Navigator::ScaleImpl(m2::PointD const & newPt1, m2::PointD const & newPt2,
m2::PointD const & oldPt1, m2::PointD const & oldPt2,
bool skipMinScaleAndBordersCheck,
bool doRotateScreen)
{
math::Matrix<double, 3, 3> newM = m_Screen.GtoPMatrix() * ScreenBase::CalcTransform(oldPt1, oldPt2, newPt1, newPt2);
double oldAngle = m_Screen.GetAngle();
ScreenBase tmp = m_Screen;
tmp.SetGtoPMatrix(newM);
if (!doRotateScreen)
tmp.Rotate(-(tmp.GetAngle() - oldAngle));
if (!skipMinScaleAndBordersCheck && !CheckMinScale(tmp))
return false;
m2::RectD const & worldR = m_scales.GetWorldRect();
if (!skipMinScaleAndBordersCheck && !CheckBorders(tmp))
{
if (CanShrinkInto(tmp, worldR))
tmp = ShrinkInto(tmp, worldR);
else
return false;
}
if (!CheckMaxScale(tmp))
return false;
// re-checking the borders, as we might violate them a bit (don't know why).
if (!CheckBorders(tmp))
tmp = ScaleInto(tmp, worldR);
m_Screen = tmp;
return true;
}
