virtual void on_key(int x, int y, unsigned key, unsigned flags)
{
if(key == ' ')
{
m_shape.read_next();
m_shape.scale(width(), height());
force_redraw();
}
if(key == '+' || key == agg::key_kp_plus)
{
m_scale *= agg::trans_affine_translation(-x, -y);
m_scale *= agg::trans_affine_scaling(1.1);
m_scale *= agg::trans_affine_translation(x, y);
force_redraw();
}
if(key == '-' || key == agg::key_kp_minus)
{
m_scale *= agg::trans_affine_translation(-x, -y);
m_scale *= agg::trans_affine_scaling(1/1.1);
m_scale *= agg::trans_affine_translation(x, y);
force_redraw();
}
if(key == agg::key_left)
{
m_scale *= agg::trans_affine_translation(-x, -y);
m_scale *= agg::trans_affine_rotation(-agg::pi / 20.0);
m_scale *= agg::trans_affine_translation(x, y);
force_redraw();
}
if(key == agg::key_right)
{
m_scale *= agg::trans_affine_translation(-x, -y);
m_scale *= agg::trans_affine_rotation(agg::pi / 20.0);
m_scale *= agg::trans_affine_translation(x, y);
force_redraw();
}
}
void read_next()
{
m_shape.read_next();
m_shape.scale(width(), height());
}