command for compile

gcc `pkg-config --cflags gtk+-3.0` -o test test.c `pkg-config --libs gtk+-3.0`

test for timer

#include <stdlib.h>
#include <gtk/gtk.h>
#include <string.h>
#include <stdio.h>

static gboolean tick(gpointer buffer)
{
  gchar str[100];
  long time;

  time = strtol(gtk_entry_buffer_get_text((GtkEntryBuffer *)buffer), NULL, 10);

  if(time == 0){
    system("aplay /usr/share/sounds/alsa/Front_Center.wav");
    return FALSE;
  }else{
    /* g_print("%ld", time); */
    sprintf(str, "%ld", time - 1);

    gtk_entry_buffer_set_text(buffer, (const gchar *)str, strlen(str));

    return TRUE;
  }
}

static void set_tick_and_start(GtkWidget *widget,
                 gpointer data,
                 GtkEntry *entry)
{
  GtkEntryBuffer *buffer;

  buffer = gtk_entry_get_buffer(entry);

  g_timeout_add(1, tick, buffer);

  return;
};

static void activate(GtkApplication *app,
                     gpointer user_data)
{
  GtkWidget *window;
  GtkWidget *button;
  GtkWidget *box;
  GtkWidget *box2;
  GtkWidget *entry;

  window = gtk_application_window_new(app);
  gtk_window_set_title(GTK_WINDOW(window), "Test");
  gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

  box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
  gtk_container_add(GTK_CONTAINER(window), box);

  button = gtk_button_new_with_label("Start");

  /* g_signal_connect_swapped(button, "clicked", G_CALLBACK(gtk_widget_destroy), window); */
  gtk_container_add(GTK_CONTAINER(box), button);

  box2 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
  gtk_container_add(GTK_CONTAINER(box), box2);

  entry = gtk_entry_new_with_buffer(gtk_entry_buffer_new("", 0));

  gtk_container_add(GTK_CONTAINER(box2), entry);
  gtk_container_add(GTK_CONTAINER(box2), gtk_label_new("ms"));

  g_signal_connect(button, "clicked", G_CALLBACK(set_tick_and_start), entry);

  gtk_widget_show_all(window);


  return;
}

int main(int argc, char *argv[])
{
  GtkApplication *app;
  int status;

  app = gtk_application_new("test.time", G_APPLICATION_FLAGS_NONE);
  g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);

  status = g_application_run(G_APPLICATION(app), argc, argv);

  g_object_unref(app);

  return status;
}

test for timer v2

#include <stdlib.h>
#include <gtk/gtk.h>
#include <string.h>
#include <stdio.h>

static long timer;

static gboolean tick(gpointer buffer)
{
  gchar str[100];

  if(timer == 0){
    system("aplay /usr/share/sounds/alsa/Front_Center.wav");
    return FALSE;
  }else{
    timer --;
    return TRUE;
  }
}

static void set_tick_and_start(GtkWidget *widget,
                 gpointer data,
                 GtkEntry *entry)
{
  GtkEntryBuffer *buffer;


  buffer = gtk_entry_get_buffer(entry);

  timer = strtol(gtk_entry_buffer_get_text((GtkEntryBuffer *)buffer), NULL, 10);

  g_timeout_add(1, tick, buffer);

  return;
};

static void activate(GtkApplication *app,
                     gpointer user_data)
{
  GtkWidget *window;
  GtkWidget *button;
  GtkWidget *box;
  GtkWidget *box2;
  GtkWidget *entry;

  window = gtk_application_window_new(app);
  gtk_window_set_title(GTK_WINDOW(window), "Test");
  gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

  box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
  gtk_container_add(GTK_CONTAINER(window), box);

  button = gtk_button_new_with_label("Start");

  /* g_signal_connect_swapped(button, "clicked", G_CALLBACK(gtk_widget_destroy), window); */
  gtk_container_add(GTK_CONTAINER(box), button);

  box2 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
  gtk_container_add(GTK_CONTAINER(box), box2);

  entry = gtk_entry_new_with_buffer(gtk_entry_buffer_new("", 0));

  gtk_container_add(GTK_CONTAINER(box2), entry);
  gtk_container_add(GTK_CONTAINER(box2), gtk_label_new("ms"));

  g_signal_connect(button, "clicked", G_CALLBACK(set_tick_and_start), entry);

  gtk_widget_show_all(window);


  return;
}

int main(int argc, char *argv[])
{
  GtkApplication *app;
  int status;

  app = gtk_application_new("test.time", G_APPLICATION_FLAGS_NONE);
  g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);

  status = g_application_run(G_APPLICATION(app), argc, argv);

  g_object_unref(app);

  return status;
}

test for timer v3

#! /usr/bin/env bash

sleep $1
aplay "/usr/share/sounds/alsa/Front_Center.wav"