edje-drag.c

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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
static const char commands[] = \
"commands are:\n"
"\tDown - 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"))
{
printf(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);
printf(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 Drag 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);
if (!edje_object_file_set(edje_obj, edje_file, "example/group"))
printf("failed to set file %s.\n", edje_file);
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);
printf(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;
}
Ecore_Evas.h
Evas wrapper functions.
Edje.h
Edje Graphical Design Library.
EVAS_CALLBACK_KEY_DOWN
@ EVAS_CALLBACK_KEY_DOWN
Key Press Event.
Definition: Evas_Common.h:430
ecore_evas_init
EAPI int ecore_evas_init(void)
Inits the Ecore_Evas system.
Definition: ecore_evas.c:602
ecore_evas_callback_destroy_set
EAPI void ecore_evas_callback_destroy_set(Ecore_Evas *ee, Ecore_Evas_Event_Cb func)
Sets a callback for Ecore_Evas destroy events.
Definition: ecore_evas.c:1185
ecore_evas_title_set
EAPI void ecore_evas_title_set(Ecore_Evas *ee, const char *t)
Sets the title of an Ecore_Evas' window.
Definition: ecore_evas.c:1527
ecore_evas_show
EAPI void ecore_evas_show(Ecore_Evas *ee)
Shows an Ecore_Evas' window.
Definition: ecore_evas.c:1480
ecore_evas_get
EAPI Evas * ecore_evas_get(const Ecore_Evas *ee)
Gets an Ecore_Evas's Evas.
Definition: ecore_evas.c:1300
ecore_evas_data_get
EAPI void * ecore_evas_data_get(const Ecore_Evas *ee, const char *key)
Retrieves user data associated with an Ecore_Evas.
Definition: ecore_evas.c:1092
ecore_evas_geometry_get
EAPI void ecore_evas_geometry_get(const Ecore_Evas *ee, int *x, int *y, int *w, int *h)
Gets the geometry of an Ecore_Evas.
Definition: ecore_evas.c:1362
ecore_evas_data_set
EAPI void ecore_evas_data_set(Ecore_Evas *ee, const char *key, const void *data)
Stores user data in an Ecore_Evas structure.
Definition: ecore_evas.c:1103
ecore_evas_new
EAPI Ecore_Evas * ecore_evas_new(const char *engine_name, int x, int y, int w, int h, const char *extra_options)
Creates a new Ecore_Evas based on engine name and common parameters.
Definition: ecore_evas.c:1039
ecore_evas_callback_resize_set
EAPI void ecore_evas_callback_resize_set(Ecore_Evas *ee, Ecore_Evas_Event_Cb func)
Sets a callback for Ecore_Evas resize events.
Definition: ecore_evas.c:1140
ecore_evas_shutdown
EAPI int ecore_evas_shutdown(void)
Shuts down the Ecore_Evas system.
Definition: ecore_evas.c:666
ecore_evas_free
EAPI void ecore_evas_free(Ecore_Evas *ee)
Frees an Ecore_Evas.
Definition: ecore_evas.c:1083
ecore_main_loop_quit
void ecore_main_loop_quit(void)
Quits the main loop once all the events currently on the queue have been processed.
Definition: ecore_main.c:1321
ecore_main_loop_begin
void ecore_main_loop_begin(void)
Runs the application main loop.
Definition: ecore_main.c:1311
edje_shutdown
int edje_shutdown(void)
Shuts down the Edje library.
Definition: edje_main.c:262
edje_init
int edje_init(void)
Initializes the Edje library.
Definition: edje_main.c:35
edje_object_add
Evas_Object * edje_object_add(Evas *evas)
Instantiates a new Edje object.
Definition: edje_smart.c:22
edje_object_signal_callback_add
void edje_object_signal_callback_add(Evas_Object *obj, const char *emission, const char *source, Edje_Signal_Cb func, void *data)
Adds a callback for an arriving Edje signal, emitted by a given Edje object.
Definition: edje_legacy.c:85
edje_object_file_set
Eina_Bool edje_object_file_set(Evas_Object *obj, const char *file, const char *group)
Sets the EDJ file (and group within it) to load an Edje object's contents from.
Definition: edje_smart.c:467
edje_object_part_drag_size_set
Eina_Bool edje_object_part_drag_size_set(Evas_Object *obj, const char *part, double dw, double dh)
Sets the dragable object size.
Definition: edje_legacy.c:240
edje_object_part_drag_page
Eina_Bool edje_object_part_drag_page(Evas_Object *obj, const char *part, double dx, double dy)
Pages x,y steps.
Definition: edje_legacy.c:282
edje_object_part_drag_value_set
Eina_Bool edje_object_part_drag_value_set(Evas_Object *obj, const char *part, double dx, double dy)
Sets the dragable object location.
Definition: edje_legacy.c:228
edje_object_part_drag_page_set
Eina_Bool edje_object_part_drag_page_set(Evas_Object *obj, const char *part, double dx, double dy)
Sets the page step increments.
Definition: edje_legacy.c:264
edje_object_part_drag_value_get
Eina_Bool edje_object_part_drag_value_get(const Evas_Object *obj, const char *part, double *dx, double *dy)
Gets the dragable object location.
Definition: edje_legacy.c:234
edje_object_part_drag_step_set
Eina_Bool edje_object_part_drag_step_set(Evas_Object *obj, const char *part, double dx, double dy)
Sets the drag step increment.
Definition: edje_legacy.c:252
edje_object_part_drag_step
Eina_Bool edje_object_part_drag_step(Evas_Object *obj, const char *part, double dx, double dy)
Steps the dragable x,y steps.
Definition: edje_legacy.c:276
EINA_TRUE
#define EINA_TRUE
boolean value TRUE (numerical value 1)
Definition: eina_types.h:539
EINA_UNUSED
#define EINA_UNUSED
Used to indicate that a function parameter is purposely unused.
Definition: eina_types.h:339
Evas
Eo Evas
An opaque handle to an Evas canvas.
Definition: Evas_Common.h:163
evas_object_show
EVAS_API void evas_object_show(Evas_Object *eo_obj)
Makes the given Evas object visible.
Definition: evas_object_main.c:1814
evas_object_color_set
EVAS_API void evas_object_color_set(Evas_Object *obj, int r, int g, int b, int a)
Sets the general/main color of the given Evas object to the given one.
Definition: evas_object_main.c:2024
evas_object_event_callback_add
EVAS_API void evas_object_event_callback_add(Evas_Object *eo_obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data)
Add (register) a callback function to a given Evas object event.
Definition: evas_callbacks.c:478
evas_object_move
EVAS_API void evas_object_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
Move the given Evas object to the given location inside its canvas' viewport.
Definition: evas_object_main.c:1171
Evas_Object
Efl_Canvas_Object Evas_Object
An Evas Object handle.
Definition: Evas_Common.h:185
evas_object_focus_set
EVAS_API void evas_object_focus_set(Efl_Canvas_Object *obj, Eina_Bool focus)
Indicates that this object is the keyboard event receiver on its canvas.
Definition: efl_canvas_object_eo.legacy.c:39
evas_object_resize
EVAS_API void evas_object_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
Changes the size of the given Evas object.
Definition: evas_object_main.c:1236
evas_object_rectangle_add
EVAS_API Evas_Object * evas_object_rectangle_add(Evas *e)
Adds a rectangle to the given evas.
Definition: evas_object_rectangle.c:78
_Evas_Event_Key_Down
Key press event.
Definition: Evas_Legacy.h:314
_Evas_Event_Key_Down::key
const char * key
The logical key : (eg shift+1 == exclamation)
Definition: Evas_Legacy.h:320