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#---------------------------------------------------------------------------
# Name: etg/palette.py
# Author: Scott Talbert
#
# Created: 31-Jul-2016
# Copyright: (c) 2016-2020 by Total Control Software
# License: wxWindows License
#---------------------------------------------------------------------------
import etgtools
import etgtools.tweaker_tools as tools
from textwrap import dedent
PACKAGE = "wx"
MODULE = "_core"
NAME = "palette" # Base name of the file to generate to for this script
DOCSTRING = ""
# The classes and/or the basename of the Doxygen XML files to be processed by
# this script.
ITEMS = [ 'wxPalette' ]
#---------------------------------------------------------------------------
def run():
# Parse the XML file(s) building a collection of Extractor objects
module = etgtools.ModuleDef(PACKAGE, MODULE, NAME, DOCSTRING)
etgtools.parseDoxyXML(module, ITEMS)
#-----------------------------------------------------------------
# Tweak the parsed meta objects in the module object as needed for
# customizing the generated code and docstrings.
c = module.find('wxPalette')
tools.removeVirtuals(c)
# Add a helper function for use with the Create method and the Ctor
# accepting RGB data.
c.addCppCode("""\
// a helper function to be used in the Create method and one of the Ctors
bool _paletteCreateHelper(wxPalette* self,
PyObject* red, PyObject* green, PyObject* blue) {
bool rval = false;
wxPyThreadBlocker blocker;
char* errMsg = "Expected a sequence of integer objects";
if (!PySequence_Check(red) || !PySequence_Check(green) || !PySequence_Check(blue)) {
PyErr_SetString(PyExc_TypeError, errMsg);
return rval;
}
Py_ssize_t count = PySequence_Size(red);
if (PySequence_Size(green) != count || PySequence_Size(blue) != count) {
PyErr_SetString(PyExc_ValueError, "Sequence lengths must be equal");
return rval;
}
unsigned char* redArray = new unsigned char[count];
unsigned char* greenArray = new unsigned char[count];
unsigned char* blueArray = new unsigned char[count];
for (Py_ssize_t i = 0; i < count; i++) {
PyObject* redItem = PySequence_ITEM(red, i);
PyObject* greenItem = PySequence_ITEM(green, i);
PyObject* blueItem = PySequence_ITEM(blue, i);
if (!wxPyInt_Check(redItem) || !wxPyInt_Check(greenItem) || !wxPyInt_Check(blueItem)) {
PyErr_SetString(PyExc_TypeError, errMsg);
goto pch_exit;
}
long redLong = wxPyInt_AsLong(redItem);
long greenLong = wxPyInt_AsLong(greenItem);
long blueLong = wxPyInt_AsLong(blueItem);
Py_DECREF(redItem);
Py_DECREF(greenItem);
Py_DECREF(blueItem);
if (redLong < 0 || redLong > 255 || greenLong < 0 || greenLong > 255 || blueLong < 0 || blueLong > 255) {
PyErr_SetString(PyExc_ValueError, "Sequence values must be in the 0..255 range");
goto pch_exit;
}
redArray[i] = redLong;
greenArray[i] = greenLong;
blueArray[i] = blueLong;
}
rval = self->Create(count, redArray, greenArray, blueArray);
pch_exit:
delete[] redArray;
delete[] greenArray;
delete[] blueArray;
return rval;
}
""")
#-----------------------------------------------------------------
# Replace the constructor accepting the arrays of RGB values with one that
# understands any Python sequence.
c.find('wxPalette').findOverload('red').ignore()
c.addCppCtor('(PyObject* red, PyObject* green, PyObject* blue)',
doc=dedent("""\
Creates a palette from a set of sequences of integers,
one for each red, green and blue color components.
:param red: A sequence of integer values in the range 0..255 inclusive.
:param green: A sequence of integer values in the range 0..255 inclusive.
:param blue: A sequence of integer values in the range 0..255 inclusive.
.. note:: All sequences must be the same length.
"""),
body="""\
wxPalette* pal = new wxPalette;
_paletteCreateHelper(pal, red, green, blue);
if (PyErr_Occurred()) {
delete pal;
return NULL;
}
return pal;
""")
c.find('GetPixel.red').pyInt = True
c.find('GetPixel.green').pyInt = True
c.find('GetPixel.blue').pyInt = True
c.find('GetRGB').ignore()
c.addCppMethod('PyObject*', 'GetRGB', '(int pixel)',
pyArgsString="(pixel) -> (red, green, blue)",
doc="Returns RGB values for a given palette index.",
body="""\
unsigned char red;
unsigned char green;
unsigned char blue;
wxPyThreadBlocker blocker;
if (!self->GetRGB(pixel, &red, &green, &blue)) {
PyErr_SetString(PyExc_IndexError, "Pixel out of range");
return NULL;
}
PyObject* rv = PyTuple_New(3);
PyTuple_SetItem(rv, 0, wxPyInt_FromLong(red));
PyTuple_SetItem(rv, 1, wxPyInt_FromLong(green));
PyTuple_SetItem(rv, 2, wxPyInt_FromLong(blue));
return rv;
""")
# Replace the Create method with one that understands any kind of Python sequence
c.find('Create').ignore()
c.addCppMethod('PyObject*', 'Create', '(PyObject* red, PyObject* green, PyObject* blue)',
pyArgsString="(red, green, blue) -> bool",
doc=dedent("""\
Creates a palette from 3 sequences of integers, one for each red, blue or green component.
:param red: A sequence of integer values in the range 0..255 inclusive.
:param green: A sequence of integer values in the range 0..255 inclusive.
:param blue: A sequence of integer values in the range 0..255 inclusive.
.. note:: All sequences must be the same length.
"""),
body="""\
bool rval = _paletteCreateHelper(self, red, green, blue);
wxPyThreadBlocker blocker;
if (PyErr_Occurred())
return NULL;
if (rval)
Py_RETURN_TRUE;
else
Py_RETURN_FALSE;
""")
#-----------------------------------------------------------------
tools.doCommonTweaks(module)
tools.runGenerators(module)
#---------------------------------------------------------------------------
if __name__ == '__main__':
run()
|
