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edje-drag.c
#ifdef HAVE_CONFIG_H
# include "config.h"
#else
# define EINA_UNUSED
#endif
#ifndef PACKAGE_DATA_DIR
#define PACKAGE_DATA_DIR "."
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Edje.h>
#define WIDTH 300
#define HEIGHT 300
#define RECTW 30
#define RECTH 30
#define NRECTS 20
static const char commands[] = \
"commands are:\n"
"\tDdown - set drag step to 1\n"
"\tUp - set drag step to -1\n"
"\tm - set drag value to 0.5\n"
"\tPrior - set drag page to -1\n"
"\tNext - set drag page to -1\n"
"\tEsc - exit\n"
"\th - print help\n";
static const char *PARTNAME = "example/knob";
static void
_on_destroy(Ecore_Evas *ee EINA_UNUSED)
{
ecore_main_loop_quit();
}
/* here just to keep our example's window size and background image's
* size in synchrony */
static void
_on_canvas_resize(Ecore_Evas *ee)
{
Evas_Object *bg;
Evas_Object *edje_obj;
int w;
int h;
bg = ecore_evas_data_get(ee, "background");
edje_obj = ecore_evas_data_get(ee, "edje_obj");
ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
evas_object_resize(bg, w, h);
evas_object_resize(edje_obj, w, h);
}
static void
_on_bg_key_down(void *data, Evas *e EINA_UNUSED, Evas_Object *o EINA_UNUSED, void *event_info)
{
Ecore_Evas *ee;
Evas_Event_Key_Down *ev;
Evas_Object *edje_obj;
ee = (Ecore_Evas *)data;
ev = (Evas_Event_Key_Down *)event_info;
edje_obj = ecore_evas_data_get(ee, "edje_obj");
if (!strcmp(ev->key, "h"))
{
fprintf(stdout, commands);
return;
}
else if (!strcmp(ev->key, "Down"))
{
edje_object_part_drag_step(edje_obj, PARTNAME, 0, 1.0);
}
else if (!strcmp(ev->key, "Up"))
{
edje_object_part_drag_step(edje_obj, PARTNAME, 0, -1.0);
}
else if (!strcmp(ev->key, "m"))
{
edje_object_part_drag_value_set(edje_obj, PARTNAME, 0.0, 0.5);
}
else if (!strcmp(ev->key, "Prior"))
{
edje_object_part_drag_page(edje_obj, PARTNAME, 0.0, -1.0);
}
else if (!strcmp(ev->key, "Next"))
{
edje_object_part_drag_page(edje_obj, PARTNAME, 0.0, 1.0);
}
else if (!strcmp(ev->key, "Escape"))
ecore_main_loop_quit();
else
{
printf("unhandled key: %s\n", ev->key);
fprintf(stdout, commands);
}
}
static void
_on_knob_moved(void *data EINA_UNUSED, Evas_Object *o, const char *emission EINA_UNUSED, const char *source EINA_UNUSED)
{
double val;
edje_object_part_drag_value_get(o, PARTNAME, NULL, &val);
printf("value changed to: %0.3f\n", val);
}
int
main(int argc EINA_UNUSED, char *argv[] EINA_UNUSED)
{
const char *edje_file = PACKAGE_DATA_DIR"/drag.edj";
Ecore_Evas *ee;
Evas *evas;
Evas_Object *bg;
Evas_Object *edje_obj;
if (!ecore_evas_init())
return EXIT_FAILURE;
if (!edje_init())
goto shutdown_ecore_evas;
/* this will give you a window with an Evas canvas under the first
* engine available */
ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
if (!ee) goto shutdown_edje;
ecore_evas_callback_destroy_set(ee, _on_destroy);
ecore_evas_callback_resize_set(ee, _on_canvas_resize);
ecore_evas_title_set(ee, "Edje Box Example");
evas = ecore_evas_get(ee);
bg = evas_object_rectangle_add(evas);
evas_object_color_set(bg, 255, 255, 255, 255);
evas_object_resize(bg, WIDTH, HEIGHT);
evas_object_focus_set(bg, EINA_TRUE);
evas_object_show(bg);
ecore_evas_data_set(ee, "background", bg);
evas_object_event_callback_add(bg, EVAS_CALLBACK_KEY_DOWN, _on_bg_key_down, ee);
edje_obj = edje_object_add(evas);
edje_object_file_set(edje_obj, edje_file, "example/group");
evas_object_move(edje_obj, 0, 0);
evas_object_resize(edje_obj, WIDTH, HEIGHT);
evas_object_show(edje_obj);
ecore_evas_data_set(ee, "edje_obj", edje_obj);
edje_object_part_drag_size_set(edje_obj, PARTNAME, 1.0, 0.4);
if (!edje_object_part_drag_step_set(edje_obj, PARTNAME, 0.0, 0.1))
printf("error when setting drag step size.\n");
if (!edje_object_part_drag_page_set(edje_obj, PARTNAME, 0.0, 0.3))
printf("error when setting drag page step size.\n");
edje_object_signal_callback_add(edje_obj, "drag", PARTNAME, _on_knob_moved, NULL);
fprintf(stdout, commands);
ecore_evas_show(ee);
ecore_main_loop_begin();
ecore_evas_free(ee);
ecore_evas_shutdown();
edje_shutdown();
return EXIT_SUCCESS;
shutdown_edje:
edje_shutdown();
shutdown_ecore_evas:
ecore_evas_shutdown();
return EXIT_FAILURE;
}