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/*
* Copyright (C) 2020 Jordan Halase <jordan@halase.me>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <python3.7/Python.h>
#include <pygobject-3.0/pygobject.h>
#include <gtk/gtk.h>
/* Name of the Python GTK Widget class */
#define WIDGET_NAME "MainWidget"
/* Name of the Python module */
#define MODULE_NAME ("ui." WIDGET_NAME)
/** Initialize a Python interpreter and load the main module */
static PyObject *init_python_module(const char *module_name)
{
Py_Initialize();
PyObject *sys_path = PySys_GetObject("path");
PyList_Append(sys_path, PyUnicode_FromString("."));
PyObject *module = PyImport_ImportModule(module_name);
if (!module) {
PyErr_Print();
}
return module;
}
/** Construct a new Python widget from a loaded module */
static GtkWidget *new_python_widget(PyObject *module)
{
PyObject *widget_py = PyObject_CallMethod(module, WIDGET_NAME, "");
if (!widget_py) {
PyErr_Print();
return NULL;
}
GObject *observed = pygobject_get(widget_py);
if (!observed || !G_IS_OBJECT(observed)) {
fprintf(stderr, WIDGET_NAME " not a GObject\n");
}
return GTK_WIDGET(observed);
}
static void on_activate(GtkApplication *app)
{
PyObject *module = init_python_module(MODULE_NAME);
GtkWidget *win = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(win), "PyGObject Widget from C");
GtkWidget *widget = new_python_widget(module);
gtk_container_add(GTK_CONTAINER(win), widget);
g_signal_connect_swapped(win, "destroy", G_CALLBACK(gtk_widget_destroy), win);
gtk_widget_show_all(win);
}
int main(int argc, char **argv)
{
GtkApplication *app = gtk_application_new("com.example.GtkApplication",
G_APPLICATION_FLAGS_NONE);
g_signal_connect(app, "activate", G_CALLBACK(on_activate), NULL);
g_application_run(G_APPLICATION(app), argc, argv);
return Py_FinalizeEx();
}
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