void on_mouse_button_down(int x, int y, unsigned flags)
{
if(flags & 1)
{
double xd = x;
double yd = y;
double r = 4.0 / m_scale.scale();
m_scale.inverse_transform(&xd, &yd);
m_point_idx = m_shape.hit_test(xd, yd, r);
force_redraw();
}
}
void on_mouse_move(int x, int y, unsigned flags)
{
if((flags & 1) == 0)
{
on_mouse_button_up(x, y, flags);
}
else
{
if(m_point_idx >= 0)
{
double xd = x;
double yd = y;
m_scale.inverse_transform(&xd, &yd);
m_shape.modify_vertex(m_point_idx, xd, yd);
force_redraw();
}
}
}