GTK + GLADE 编程第一例

主程序代码.  其中 G_MODULE_EXPORT 很重要, 没有它, 信号链接会有问题.

/*
* First , use glade UI design One xxx.glade file, add one window and signal handler.
* compile this C file using command :
               gcc -Wall -g -o tutorialpkg-config --cflags --libs gtk+-3.0` -export-dynamic
*/

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

static  GtkBuilder *builder;
static  GtkWidget *window, *win_about;

G_MODULE_EXPORT void on_window_destroy(GtkWidget *object, gpointer user_data)
{
    g_object_unref(G_OBJECT(builder));
    gtk_main_quit();
    g_print("exitted. \n");
}

G_MODULE_EXPORT void on_btn_show_about_clicked (GtkButton *button, gpointer   user_data)
{
    win_about = GTK_WIDGET(gtk_builder_get_object(builder, "win_about"));
    gtk_window_set_modal(GTK_WINDOW(win_about), TRUE);
    gtk_widget_show_all (win_about);
}

int main (int argc, char *argv[])
{
    gtk_init(&argc, &argv);

    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder, "../turtorial.glade", NULL);
    window = GTK_WIDGET(gtk_builder_get_object(builder, "window"));
    gtk_builder_connect_signals(builder, NULL);

  /* Enter the main loop */
  gtk_widget_show_all (window);
  gtk_main ();
  return 0;
}

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.18.3 -->
<interface>
  <requires lib="gtk+" version="3.12"/>
  <object class="GtkWindow" id="win_about">
    <property name="can_focus">False</property>
    <property name="title" translatable="yes">这是一个about窗口</property>
    <property name="modal">True</property>
    <property name="destroy_with_parent">True</property>
    <child>
      <placeholder/>
    </child>
  </object>
  <object class="GtkWindow" id="window">
    <property name="can_focus">False</property>
    <property name="title" translatable="yes">GTK+ Text Editor</property>
    <signal name="destroy" handler="on_window_destroy" swapped="no"/>
    <child>
      <object class="GtkButton" id="btn_show_about">
        <property name="label" translatable="yes">显示about窗口</property>
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="receives_default">True</property>
        <signal name="clicked" handler="on_btn_show_about_clicked" swapped="no"/>
      </object>
    </child>
  </object>
</interface>

但是这样程序发布的时候需要把 demo 和 对应的 Glade文件全部发布出去， 能否只发布 demo， 把glade程序整合到代码中去呢。
答案是可以的。

编辑 demo.gresource.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<gresources>
  <gresource prefix="/org/gtk/demo">
    <file preprocess="xml-stripblanks">demo.ui</file>
    <file preprocess="xml-stripblanks">demo2.ui</file>
  </gresource>
</gresources>

使用命令 glib-compile-resources demo.gresource.xml --target=resources.c --sourcedir=. --generate-source  
这样可以通过 把 XML 包含的 UI 文件整合成 resources.c 文件中。

工程中包含这个 resources.c 文件， 代码中使用 "/org/gtk/demo/demo.ui" 来指向 ui 对应的文件。 （xxx_set_template_from_resource 或者 gtk_builder_new_from_resource 等等）

例如：
GtkBuilder *builder;
builder = gtk_builder_new_from_resource ("/org/gtk/demo/demo.ui");

gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (class), "/org/gtk/exampleapp/window.ui");