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#include <bits/stdc++.h>
#include "ui.hpp"
using namespace std;
void GTKUI::draw(cairo_t* cr, GtkWidget* drawing_area, gpointer user_data)
{
GTKUI* gtk = (GTKUI*)user_data;
AudioData* audiodata = gtk->audiodata;
float window_width = 900;
float window_height = 900;
float radius = 200;
float space = 50;
float delta, x, y;
delta = 2 * M_PI / audiodata->get_channel_cnt();
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_arc(cr, window_width / 2, window_height / 2, space, 0, 2 * M_PI);
cairo_fill(cr);
cairo_set_source_rgba(cr, 1, 0, 0, 1);
for (int i = 0; i < audiodata->get_channel_cnt(); i += 2) {
x = (radius + space) * cos(i * delta / 2);
y = (radius + space) * sin(i * delta / 2);
cairo_arc(cr, window_width / 2 - x, window_height / 2 - y, audiodata->get_channels()[i] * radius, 0, 2 * M_PI);
cairo_arc(cr, window_width / 2 + x, window_height / 2 + y, audiodata->get_channels()[i + 1] * radius, 0, 2 * M_PI);
}
cairo_fill(cr);
gtk_widget_queue_draw(drawing_area);
}
void GTKUI::draw_cb(GtkDrawingArea* drawing_area, cairo_t* cr, int width, int height, gpointer user_data)
{
GTKUI* gtk = (GTKUI*)user_data;
AudioData* audiodata = gtk->audiodata;
if (audiodata->get_channel_cnt() == 0)
return;
cairo_paint(cr);
draw(cr, GTK_WIDGET(drawing_area), user_data);
}
struct ButtonData {
GTKUI* gtk;
int select_device;
};
void GTKUI::select_device(GtkWidget* widget, gpointer user_data)
{
ButtonData* buttond = (ButtonData*)user_data;
GTKUI* gtk = buttond->gtk;
AudioData* audiodata = gtk->audiodata;
audiodata->set_device_num(buttond->select_device);
audiodata->start_stream();
gtk_widget_add_tick_callback(gtk->drawing_area, gtk->drawCallback, user_data, NULL);
}
void GTKUI::refresh(GtkWidget* widget, gpointer user_data)
{
GTKUI* gtk = (GTKUI*)user_data;
AudioData* audiodata = gtk->audiodata;
Pa_Terminate();
Pa_Initialize();
int numDevices = Pa_GetDeviceCount();
if (numDevices < 0) {
printf("Error getting device count.\n");
exit(EXIT_FAILURE);
} else if (numDevices == 0) {
printf("There are no available audio devices on this machine.\n");
exit(EXIT_SUCCESS);
}
GtkWidget* button;
for (int i = 0; i < numDevices; i++) {
const PaDeviceInfo* deviceInfo = Pa_GetDeviceInfo(i);
ButtonData* buttond = new ButtonData;
buttond->gtk = gtk;
buttond->select_device = i;
button = gtk_button_new_with_label(deviceInfo->name);
gtk->buttons.push_back(button);
g_signal_connect(button, "clicked", G_CALLBACK(select_device), buttond);
gtk_grid_attach(GTK_GRID(gtk->grid), button, 0, numDevices - i - 1, 1, 1);
}
gtk_widget_queue_draw(gtk->grid);
}
void GTKUI::close_window(GtkWidget* widget, gpointer user_data)
{
GTKUI* gtk = (GTKUI*)user_data;
AudioData* audiodata = gtk->audiodata;
audiodata->close_stream();
gtk_window_destroy(GTK_WINDOW(gtk->window));
}
gboolean GTKUI::drawCallback(GtkWidget* widget, GdkFrameClock* frame_clock, gpointer user_data)
{
if (widget) {
gtk_widget_queue_draw(GTK_WIDGET(widget));
}
return true;
}
void GTKUI::activate(GtkApplication* app, gpointer user_data)
{
GTKUI* gtk = (GTKUI*)user_data;
// init window
gtk->window = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(gtk->window), "Directional Audio Visualizer");
// init grid
gtk->grid = gtk_grid_new();
gtk_window_set_child(GTK_WINDOW(gtk->window), gtk->grid);
// init drawing_area
gtk->drawing_area = gtk_drawing_area_new();
gtk_widget_set_size_request(gtk->drawing_area, 900, 900);
gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(gtk->drawing_area), draw_cb, user_data, NULL);
gtk_grid_attach(GTK_GRID(gtk->grid), gtk->drawing_area, 1, 2, 100, 100);
// init audio devices
Pa_Initialize();
refresh(gtk->window, user_data);
// init button for refresh
gtk->refresh_button = gtk_button_new_with_label("Refresh");
g_signal_connect(gtk->refresh_button, "clicked", G_CALLBACK(gtk->refresh), gtk);
gtk_grid_attach(GTK_GRID(gtk->grid), gtk->refresh_button, 1, 0, 1, 1);
// init button for quit
gtk->quit_button = gtk_button_new_with_label("Quit");
g_signal_connect(gtk->quit_button, "clicked", G_CALLBACK(gtk->close_window), gtk);
gtk_grid_attach(GTK_GRID(gtk->grid), gtk->quit_button, 1, 1, 1, 1);
// set window
gtk_window_present(GTK_WINDOW(gtk->window));
}
GTKUI::GTKUI(int argc, char* argv[])
{
this->audiodata = new AudioData;
app = gtk_application_new("org.gtk.example", G_APPLICATION_DEFAULT_FLAGS);
g_signal_connect(app, "activate", G_CALLBACK(activate), this);
status = g_application_run(G_APPLICATION(app), argc, argv);
g_object_unref(app);
}
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