Table Smart Object example

This example will arrange rectangles of different sizes(and colors) in a table. While it's possible to create the same layout we are doing here by positioning each rectangle independently, using a table makes it a lot easier, since the table will control layout of all the objects, allowing you to move, resize or hide the entire table.

We'll start with creating the table, setting it to EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE to have maximum flexibility and setting its padding to 0:

table = evas_object_table_add(d.evas);
evas_object_table_homogeneous_set(table, EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE);
evas_object_table_padding_set(table, 0, 0);
evas_object_resize(table, WIDTH, HEIGHT);

We then create each rectangle and add it to the table:

rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 255, 0, 0, 255);
evas_object_size_hint_min_set(rect, 100, 50);
evas_object_table_pack(table, rect, 1, 1, 2, 1);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 0, 255, 0, 255);
evas_object_size_hint_min_set(rect, 50, 100);
evas_object_table_pack(table, rect, 1, 2, 1, 2);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 0, 0, 255, 255);
evas_object_size_hint_min_set(rect, 50, 50);
evas_object_table_pack(table, rect, 2, 2, 1, 1);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 255, 255, 0, 255);
evas_object_size_hint_min_set(rect, 50, 50);
evas_object_table_pack(table, rect, 2, 3, 1, 1);
Note
Each rectangle has a different minimum size based on how many rows and columns it will occupy.

The full source for this example follow:

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <stdlib.h>
#define WIDTH 100
#define HEIGHT 150
struct test_data
{
Ecore_Evas *ee;
Evas *evas;
};
static struct test_data d = {0};
static void
_on_destroy(Ecore_Evas *ee EINA_UNUSED)
{
}
/* Keep the example's window size in sync with the background image's size */
static void
_canvas_resize_cb(Ecore_Evas *ee)
{
int w, h;
ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
evas_object_resize(d.bg, w, h);
}
int
main(void)
{
Evas_Object *table, *rect;
return EXIT_FAILURE;
/* this will give you a window with an Evas canvas under the first
* engine available */
d.ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
if (!d.ee)
goto error;
ecore_evas_callback_destroy_set(d.ee, _on_destroy);
ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
/* the canvas pointer, de facto */
d.evas = ecore_evas_get(d.ee);
d.bg = evas_object_rectangle_add(d.evas);
evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
evas_object_move(d.bg, 0, 0); /* at canvas' origin */
evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
table = evas_object_table_add(d.evas);
evas_object_table_homogeneous_set(table, EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE);
evas_object_table_padding_set(table, 0, 0);
evas_object_resize(table, WIDTH, HEIGHT);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 255, 0, 0, 255);
evas_object_size_hint_min_set(rect, 100, 50);
evas_object_table_pack(table, rect, 1, 1, 2, 1);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 0, 255, 0, 255);
evas_object_size_hint_min_set(rect, 50, 100);
evas_object_table_pack(table, rect, 1, 2, 1, 2);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 0, 0, 255, 255);
evas_object_size_hint_min_set(rect, 50, 50);
evas_object_table_pack(table, rect, 2, 2, 1, 1);
rect = evas_object_rectangle_add(d.evas);
evas_object_color_set(rect, 255, 255, 0, 255);
evas_object_size_hint_min_set(rect, 50, 50);
evas_object_table_pack(table, rect, 2, 3, 1, 1);
return 0;
error:
fprintf(stderr, "error: Requires at least one Evas engine built and linked"
" to ecore-evas for this example to run properly.\n");
return -1;
}
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:1059
ecore_evas_shutdown
EAPI int ecore_evas_shutdown(void)
Shuts down the Ecore_Evas system.
Definition: ecore_evas.c:668
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:1382
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:1160
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:1289
EINA_UNUSED
#define EINA_UNUSED
Definition: eina_types.h:321
ecore_evas_free
EAPI void ecore_evas_free(Ecore_Evas *ee)
Frees an Ecore_Evas.
Definition: ecore_evas.c:1103
ecore_evas_init
EAPI int ecore_evas_init(void)
Inits the Ecore_Evas system.
Definition: ecore_evas.c:604
evas_object_table_add
Evas_Object * evas_object_table_add(Evas *evas)
Create a new table.
Definition: evas_object_table.c:972
Evas_Object
Efl_Canvas_Object Evas_Object
Definition: Evas_Common.h:180
Ecore_Evas.h
Evas wrapper functions.
ecore_evas_get
EAPI Evas * ecore_evas_get(const Ecore_Evas *ee)
Gets an Ecore_Evas's Evas.
Definition: ecore_evas.c:1320
ecore_main_loop_begin
void ecore_main_loop_begin(void)
Runs the application main loop.
Definition: ecore_main.c:1279
evas_object_show
void evas_object_show(Evas_Object *eo_obj)
Makes the given Evas object visible.
Definition: evas_object_main.c:1853
Evas
Eo Evas
Definition: Evas_Common.h:158
evas_object_rectangle_add
Evas_Object * evas_object_rectangle_add(Evas *e)
Adds a rectangle to the given evas.
Definition: evas_object_rectangle.c:78
EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE
No mode specified.
Definition: evas_table_eo.h:24
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:1205
ecore_evas_show
EAPI void ecore_evas_show(Ecore_Evas *ee)
Shows an Ecore_Evas' window.
Definition: ecore_evas.c:1500
evas_object_color_set
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:2063