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Added 'set_aspect' and set_aspect_equal function #257

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Merged
lava merged 1 commit into lava:master from pnarvor:aspect-control
Apr 2, 2021
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3 changes: 3 additions & 0 deletions examples/modern.cpp
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@ int main()
// y must either be callable (providing operator() const) or iterable.
plt::plot(x, y, "r-", x, [](double d) { return 12.5+abs(sin(d)); }, "k-");

//plt::set_aspect(0.5);
plt::set_aspect_equal();


// show plots
plt::show();
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56 changes: 56 additions & 0 deletions matplotlibcpp.h
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1857,6 +1857,62 @@ inline void legend(const std::map<std::string, std::string>& keywords)
Py_DECREF(res);
}

template<typename Numeric>
inline void set_aspect(Numeric ratio)
{
detail::_interpreter::get();

PyObject* args = PyTuple_New(1);
PyTuple_SetItem(args, 0, PyFloat_FromDouble(ratio));
PyObject* kwargs = PyDict_New();

PyObject *ax =
PyObject_CallObject(detail::_interpreter::get().s_python_function_gca,
detail::_interpreter::get().s_python_empty_tuple);
if (!ax) throw std::runtime_error("Call to gca() failed.");
Py_INCREF(ax);

PyObject *set_aspect = PyObject_GetAttrString(ax, "set_aspect");
if (!set_aspect) throw std::runtime_error("Attribute set_aspect not found.");
Py_INCREF(set_aspect);

PyObject *res = PyObject_Call(set_aspect, args, kwargs);
if (!res) throw std::runtime_error("Call to set_aspect() failed.");
Py_DECREF(set_aspect);

Py_DECREF(ax);
Py_DECREF(args);
Py_DECREF(kwargs);
}

inline void set_aspect_equal()
{
// expect ratio == "equal". Leaving error handling to matplotlib.
detail::_interpreter::get();

PyObject* args = PyTuple_New(1);
PyTuple_SetItem(args, 0, PyString_FromString("equal"));
PyObject* kwargs = PyDict_New();

PyObject *ax =
PyObject_CallObject(detail::_interpreter::get().s_python_function_gca,
detail::_interpreter::get().s_python_empty_tuple);
if (!ax) throw std::runtime_error("Call to gca() failed.");
Py_INCREF(ax);

PyObject *set_aspect = PyObject_GetAttrString(ax, "set_aspect");
if (!set_aspect) throw std::runtime_error("Attribute set_aspect not found.");
Py_INCREF(set_aspect);

PyObject *res = PyObject_Call(set_aspect, args, kwargs);
if (!res) throw std::runtime_error("Call to set_aspect() failed.");
Py_DECREF(set_aspect);

Py_DECREF(ax);
Py_DECREF(args);
Py_DECREF(kwargs);
}

template<typename Numeric>
void ylim(Numeric left, Numeric right)
{
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