efl

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/**
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 * Simple Edje example illustrating drag functions.
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 *
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 * You'll need at least one Evas engine built for it (excluding the
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 * buffer one). See stdout/stderr for output.
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 *
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 * @verbatim
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 * edje_cc drag.edc && gcc -o edje-drag edje-drag.c `pkg-config --libs --cflags evas ecore ecore-evas edje`
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 * @endverbatim
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 */
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#else
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# define EINA_UNUSED
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#endif
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#ifndef PACKAGE_DATA_DIR
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#define PACKAGE_DATA_DIR "."
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#endif
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <Edje.h>
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#define WIDTH  300
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#define HEIGHT 300
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static const char commands[] = \
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  "commands are:\n"
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  "\tDown - set drag step to 1\n"
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  "\tUp - set drag step to -1\n"
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  "\tm - set drag value to 0.5\n"
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  "\tPrior - set drag page to -1\n"
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  "\tNext - set drag page to -1\n"
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  "\tEsc - exit\n"
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  "\th - print help\n";
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static const char *PARTNAME = "example/knob";
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static void
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_on_destroy(Ecore_Evas *ee EINA_UNUSED)
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{
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   ecore_main_loop_quit();
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}
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/* here just to keep our example's window size and background image's
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 * size in synchrony */
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static void
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_on_canvas_resize(Ecore_Evas *ee)
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{
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   Evas_Object *bg;
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   Evas_Object *edje_obj;
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   int          w;
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   int          h;
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   bg = ecore_evas_data_get(ee, "background");
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   edje_obj = ecore_evas_data_get(ee, "edje_obj");
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   ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
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   evas_object_resize(bg, w, h);
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   evas_object_resize(edje_obj, w, h);
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}
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static void
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_on_bg_key_down(void *data, Evas *e EINA_UNUSED, Evas_Object *o EINA_UNUSED, void *event_info)
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{
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   Ecore_Evas          *ee;
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   Evas_Event_Key_Down *ev;
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   Evas_Object         *edje_obj;
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   ee = (Ecore_Evas *)data;
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   ev = (Evas_Event_Key_Down *)event_info;
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   edje_obj = ecore_evas_data_get(ee, "edje_obj");
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   if (!strcmp(ev->key, "h"))
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     {
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        printf(commands);
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        return;
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     }
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   else if (!strcmp(ev->key, "Down"))
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     {
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	edje_object_part_drag_step(edje_obj, PARTNAME, 0, 1.0);
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     }
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   else if (!strcmp(ev->key, "Up"))
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     {
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	edje_object_part_drag_step(edje_obj, PARTNAME, 0, -1.0);
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     }
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   else if (!strcmp(ev->key, "m"))
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     {
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	edje_object_part_drag_value_set(edje_obj, PARTNAME, 0.0, 0.5);
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     }
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   else if (!strcmp(ev->key, "Prior"))
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     {
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	edje_object_part_drag_page(edje_obj, PARTNAME, 0.0, -1.0);
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     }
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   else if (!strcmp(ev->key, "Next"))
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     {
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	edje_object_part_drag_page(edje_obj, PARTNAME, 0.0, 1.0);
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     }
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   else if (!strcmp(ev->key, "Escape"))
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     ecore_main_loop_quit();
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   else
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     {
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        printf("unhandled key: %s\n", ev->key);
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        printf(commands);
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     }
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}
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static void
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_on_knob_moved(void *data EINA_UNUSED, Evas_Object *o, const char *emission EINA_UNUSED, const char *source EINA_UNUSED)
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{
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   double val;
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   edje_object_part_drag_value_get(o, PARTNAME, NULL, &val);
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   printf("value changed to: %0.3f\n", val);
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}
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int
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main(int argc EINA_UNUSED, char *argv[] EINA_UNUSED)
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{
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   const char  *edje_file = PACKAGE_DATA_DIR"/drag.edj";
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   Ecore_Evas  *ee;
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   Evas        *evas;
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   Evas_Object *bg;
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   Evas_Object *edje_obj;
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   if (!ecore_evas_init())
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     return EXIT_FAILURE;
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   if (!edje_init())
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     goto shutdown_ecore_evas;
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   /* this will give you a window with an Evas canvas under the first
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    * engine available */
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   ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
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   if (!ee) goto shutdown_edje;
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   ecore_evas_callback_destroy_set(ee, _on_destroy);
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   ecore_evas_callback_resize_set(ee, _on_canvas_resize);
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   ecore_evas_title_set(ee, "Edje Drag Example");
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   evas = ecore_evas_get(ee);
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   bg = evas_object_rectangle_add(evas);
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   evas_object_color_set(bg, 255, 255, 255, 255);
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   evas_object_resize(bg, WIDTH, HEIGHT);
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   evas_object_focus_set(bg, EINA_TRUE);
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   evas_object_show(bg);
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   ecore_evas_data_set(ee, "background", bg);
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   evas_object_event_callback_add(bg, EVAS_CALLBACK_KEY_DOWN, _on_bg_key_down, ee);
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   edje_obj = edje_object_add(evas);
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   if (!edje_object_file_set(edje_obj, edje_file, "example/group"))
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     printf("failed to set file %s.\n", edje_file);
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   evas_object_move(edje_obj, 0, 0);
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   evas_object_resize(edje_obj, WIDTH, HEIGHT);
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   evas_object_show(edje_obj);
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   ecore_evas_data_set(ee, "edje_obj", edje_obj);
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   edje_object_part_drag_size_set(edje_obj, PARTNAME, 1.0, 0.4);
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   if (!edje_object_part_drag_step_set(edje_obj, PARTNAME, 0.0, 0.1))
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     printf("error when setting drag step size.\n");
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   if (!edje_object_part_drag_page_set(edje_obj, PARTNAME, 0.0, 0.3))
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     printf("error when setting drag page step size.\n");
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   edje_object_signal_callback_add(edje_obj, "drag", PARTNAME, _on_knob_moved, NULL);
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   printf(commands);
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   ecore_evas_show(ee);
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   ecore_main_loop_begin();
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   ecore_evas_free(ee);
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   ecore_evas_shutdown();
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   edje_shutdown();
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   return EXIT_SUCCESS;
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 shutdown_edje:
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   edje_shutdown();
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 shutdown_ecore_evas:
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   ecore_evas_shutdown();
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   return EXIT_FAILURE;
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}
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