Question

我用命令在ubuntu上安装了gtk sudo apt-get install libgtk-3-dev

然后我将代码复制到vi编辑器

我在GTK中为helloworld复制了以下代码，这给出了编译错误

#include <gtk/gtk.h>

/* this is a callback function. the data arguments are ignored in this example..
 * More on callbacks below. */
void hello (GtkWidget *widget, gpointer *data)
{
    g_print ("Hello World\n");
}

/* another callback */
void destroy (GtkWidget *widget, gpointer *data)
{
    gtk_main_quit ();
}

int main (int argc, char *argv[])
{
    /* GtkWidget is the storage type for widgets */
    GtkWidget *window;
    GtkWidget *button;

    /* this is called in all GTK applications.  arguments are parsed from
     * the command line and are returned to the application. */
    gtk_init (&argc, &argv);

    /* create a new window */
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

    /* when the window is given the "destroy" signal (this can be given
    * by the application, or the window manager, the function destroy
    * will be called as defined above.  The data passed to the callback
    * function is NULL and is ignored in the callback. */
    gtk_signal_connect (GTK_OBJECT (window), "destroy",
                        GTK_SIGNAL_FUNC (destroy), NULL);

    /* sets the border width of the window. */
    gtk_container_border_width (GTK_CONTAINER (window), 10);

    /* creates a new button with the label "Hello World". */
    button = gtk_button_new_with_label ("Hello World");

    /* When the button receives the "clicked" signal, it will call the
     * function hello() passing it NULL as it's argument.  The hello() function is
     * defined above. */
    gtk_signal_connect (GTK_OBJECT (button), "clicked",
                        GTK_SIGNAL_FUNC (hello), NULL);

    /* This will cause the window to be destroyed by calling
     * gtk_widget_destroy(window) when "clicked.  Again, the destroy
     * signal could come from here, or the window manager. */
    gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
                               GTK_SIGNAL_FUNC (gtk_widget_destroy),
                               GTK_OBJECT (window));

    /* this packs the button into the window (a gtk container). */
    gtk_container_add (GTK_CONTAINER (window), button);

    /* the final step is to display this newly created widget... */
    gtk_widget_show (button);

    /* and the window */
    gtk_widget_show (window);

    /* all GTK applications must have a gtk_main().     Control ends here
     * and waits for an event to occur (like a key press or mouse event). */
    gtk_main ();

    return 0;
}

然后我用

编译

gcc -Wall -g HelloWorld.c -o hello_world -L/usr/X11R6/lib -lglib -lgdk -lgtk -lX11 -lXext -lm

它给出了编译错误

HelloWorld.c:4:25：致命错误：gtk / gtk.h：没有这样的文件或目录 #include

找到gtk.h给出的位置 /home/user/linux-3.13.0/tools/perf/ui/gtk/gtk.h

我想使用gtk从一个GPS坐标转向另一个使用最短路径的坐标。可能吗？ gtkmap API怎么样？我在哪里可以找到更多细节和示例？

Answer 1

我不确定，但你的代码似乎有点陈旧。我敢说它可能使用的是大约Gtk + 1.2的版本。

无论如何，我建议你阅读GNOME网站上的Gtk教程Getting Started with Gtk+。它的目标是Gtk + 3，目前版本为3.26（稳定版）。

要编译一个简单的Gtk + C应用程序，您将使用pkg-config将正确的路径转换为指示库。

让我们从之前指出的指南中选择一个非常简单的示例，并将其另存为 main.c ：

#include <gtk/gtk.h>

static void
print_hello (GtkWidget *widget,
             gpointer   data)
{
  g_print ("Hello World\n");
}

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

  /* create a new window, and set its title */
  window = gtk_application_window_new (app);
  gtk_window_set_title (GTK_WINDOW (window), "Window");
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);

  /* Here we construct the container that is going pack our buttons */
  grid = gtk_grid_new ();

  /* Pack the container in the window */
  gtk_container_add (GTK_CONTAINER (window), grid);

  button = gtk_button_new_with_label ("Button 1");
  g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);

  /* Place the first button in the grid cell (0, 0), and make it fill
   * just 1 cell horizontally and vertically (ie no spanning)
   */
  gtk_grid_attach (GTK_GRID (grid), button, 0, 0, 1, 1);

  button = gtk_button_new_with_label ("Button 2");
  g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);

  /* Place the second button in the grid cell (1, 0), and make it fill
   * just 1 cell horizontally and vertically (ie no spanning)
   */
  gtk_grid_attach (GTK_GRID (grid), button, 1, 0, 1, 1);

  button = gtk_button_new_with_label ("Quit");
  g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);

  /* Place the Quit button in the grid cell (0, 1), and make it
   * span 2 columns.
   */
  gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 2, 1);

  /* Now that we are done packing our widgets, we show them all
   * in one go, by calling gtk_widget_show_all() on the window.
   * This call recursively calls gtk_widget_show() on all widgets
   * that are contained in the window, directly or indirectly.
   */
  gtk_widget_show_all (window);

}

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

  app = gtk_application_new ("org.gtk.example", 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;
}

然后用：

编译它

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

关于地图问题，我建议libchamplain，演示文件夹中github project page上有一些示例。

不要忘记查看GNOME's Map申请及其github page。

ukntu上的gtk helloworld编译错误

1 个答案: