New simpler button example.

Patch by: João Paulo Fernandes Ventura<ventura@profusion.mobi>

SVN revision: 69508

legacy/elementary/doc/examples.dox

@@ -810,6 +810,63 @@
  */
 
  /**
+  * @page button_example_00 Button - Hello, Button!
+  *
+  * @dontinclude button_example_00.c
+  *
+  * Keeping the tradition, this is a simple "Hello, World" button example. We
+  * will show how to create a button and associate and action to be performed
+  * when you click on it.
+  *
+  * In the end, we'll be presented with something that looks like this:
+  *
+  * @image html screenshots/button_00.png
+  * @image latex screenshots/button_00.eps width=\textwidth
+  *
+  * The full code of the example is @ref button_example_00.c "here" and we
+  * will follow here with a rundown of it.
+  *
+  *
+  * There is only one button on the interface which performs a basic action:
+  * close the application. This behavior is described by on_click() function,
+  * that interrupt the program invoking elm_exit().
+  * @skip static void
+  * @until }
+  *
+  *
+  * On the main() function, we set the basic characteristics of the user
+  * interface. First we use the Elementary library to create a window and
+  * set its policies (such as close when the user click on the window close
+  * icon).
+  *
+  * @skip elm_win_add
+  * @until elm_policy_set
+  *
+  * In order to turn it visible on the WM (Window Manager), we also have to
+  * associate it to a canvas through Evas library, and set its dimensions.
+  *
+  * @skip evas_object_resize
+  * @until evas_object_show(win)
+  *
+  * Then we create a background associated to the window, define its dimensions,
+  * and turn it visible on the canvas.
+  * @skip  elm_bg_add
+  * @until evas_object_show(bg)
+  *
+  *
+  * Finally we use Elementary to create a button and Evas to set its
+  * proprieties. Here we have not only to give the button dimensions, but also
+  * its coordinates and the action to be performed on the click event.
+  * @skip elm_button_add
+  * @until evas_object_show(btn)
+  *
+  *
+  * And we are done.
+  *
+  * @example button_example_00.c
+  */
+
+/**
   * @page button_example_01 Button - Complete example
   *
   * @dontinclude button_example_01.c

legacy/elementary/src/examples/button_example_00.c

@@ -0,0 +1,54 @@
+/*
+ * gcc -o button_example_00 button_example_00.c `pkg-config --cflags --libs elementary`
+ */
+#include <Elementary.h>
+#ifdef HAVE_CONFIG_H
+#include "elementary_config.h"
+#else
+#define __UNUSED__
+#endif
+
+static void
+on_click(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
+{
+   elm_exit();
+}
+
+int
+elm_main(int argc __UNUSED__, char **argv __UNUSED__)
+{
+   Evas_Object *win = NULL;
+   Evas_Object *bg  = NULL;
+   Evas_Object *btn = NULL;
+
+   /* Create an win, associate it with a canvas and */
+   /* turn it visible on WM (Window Manager).       */
+   win = elm_win_add(NULL, "Greetings", ELM_WIN_BASIC);
+   elm_win_title_set(win, "Hello, World!");
+   elm_win_autodel_set(win, EINA_TRUE);
+   elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);
+   evas_object_resize(win, 240, 60);
+   evas_object_show(win);
+
+   /* Create a bg, associate it to an win */
+   /* and turn it visible on WM.          */
+   bg = elm_bg_add(win);
+   evas_object_size_hint_weight_set(bg, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
+   elm_win_resize_object_add(win, bg);
+   evas_object_show(bg);
+
+   /* Create a btn, associate to a function, associate */
+   /* to win,  give a dimension and position.          */
+   btn = elm_button_add(win);
+   elm_object_text_set(btn, "Good-Bye, World!");
+   evas_object_smart_callback_add(btn, "clicked", on_click, NULL);
+   evas_object_resize(btn, 120, 30);
+   evas_object_move(btn, 60, 15);
+   evas_object_show(btn);
+
+   elm_run();
+
+   return 0;
+}
+
+ELM_MAIN();