- Main Page
- Related Pages
- Modules
- Namespaces
- Data Structures
- Files
- Examples

evas-box.c
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define WIDTH (640)
#define HEIGHT (480)
static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
static const char *commands = \
"commands are:\n"
"\ta - change the box's alignment values\n"
"\tp - change the box's padding values\n"
"\t1 - change the box's layout to horizontal\n"
"\t2 - change the box's layout to vertical\n"
"\t3 - change the box's layout to horizontal homogeneous\n"
"\t4 - change the box's layout to vertical homogeneous\n"
"\t5 - change the box's layout to horizontal maximum size homogeneous\n"
"\t6 - change the box's layout to vertical maximum size homogeneous\n"
"\t7 - change the box's layout to horizontal flow\n"
"\t8 - change the box's layout to vertical flow\n"
"\t9 - change the box's layout to stack\n"
"\t0 - change the box's layout to a custom-made one\n"
"\tCtrl + NUMBER - insert a new child object at that position in the box\n"
"\tShift + NUMBER - remove the child object at that position in the box\n"
"\th - print help\n";
struct exemple_data
{
Ecore_Evas *ee;
Evas *evas;
Evas_Object *bg, *box, *border;
};
static struct exemple_data d;
static void /* custom 'diagonal' layout */
_custom_layout(Evas_Object *o,
Evas_Object_Box_Data *p,
void *data EINA_UNUSED)
{
int x, y, w, h;
int xx, yy, ww, hh;
int count;
Eina_List *l;
Evas_Object_Box_Option *opt;
evas_object_geometry_get(o, &x, &y, &w, &h);
count = eina_list_count(p->children);
ww = w / (count ? : 1);
hh = h / (count ? : 1);
if (ww < 1) ww = 1;
if (hh < 1) hh = 1;
xx = x;
yy = y;
EINA_LIST_FOREACH(p->children, l, opt)
{
evas_object_move(opt->obj, xx, yy);
xx += ww;
yy += hh;
}
}
static Evas_Object * /* new rectangle to be put in the box */
_new_rectangle_add(Evas *e)
{
Evas_Object *o;
o = evas_object_rectangle_add(e);
evas_object_resize(o, 10, 10);
evas_object_color_set(o, 0, 255, 0, 255);
evas_object_show(o);
return o;
}
/* use the following commands to interact with this example - 'h' is
* the key for help */
static void
_on_keydown(void *data EINA_UNUSED,
Evas *evas EINA_UNUSED,
Evas_Object *o EINA_UNUSED,
void *einfo)
{
Evas_Event_Key_Down *ev = einfo;
const Evas_Modifier *mods = evas_key_modifier_get(evas);
if (strcmp(ev->key, "h") == 0) /* print help */
{
fprintf(stdout, "%s", commands);
return;
}
if (evas_key_modifier_is_set(mods, "Shift"))
{
int pos;
Eina_Bool ret;
Evas_Object *obj;
Eina_List *children;
pos = atoi(ev->key);
children = evas_object_box_children_get(d.box);
obj = eina_list_nth(children, pos);
if (!obj) goto list_free;
ret = evas_object_box_remove_at(d.box, pos);
if (ret) evas_object_del(obj);
list_free:
eina_list_free(children);
return;
}
if (evas_key_modifier_is_set(mods, "Control"))
{
Evas_Object *o_;
int pos;
pos = atoi(ev->key);
o_ = _new_rectangle_add(d.evas);
if (!evas_object_box_insert_at(d.box, o_, pos))
evas_object_box_append(d.box, o_);
return;
}
if (strcmp(ev->key, "a") == 0)
{
double h, v;
evas_object_box_align_get(d.box, &h, &v);
if (h == 0.5)
h = v = 1.0;
else if (h == 1.0)
h = v = -1.0;
else if (h == -1.0)
h = v = 0.0;
else if (h == 0.0)
h = v = 0.5;
evas_object_box_align_set(d.box, h, v);
fprintf(stdout, "Applying new alignment values (%.1f, %.1f)"
" on the box\n", h, v);
return;
}
if (strcmp(ev->key, "p") == 0)
{
int h, v;
evas_object_box_padding_get(d.box, &h, &v);
if (h == 0)
h = v = 50;
else
h = v = 0;
evas_object_box_padding_set(d.box, h, v);
fprintf(stdout, "Applying new padding values (%d, %d)"
" on the box\n", h, v);
return;
}
if (strcmp(ev->key, "1") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_horizontal, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "horizontal");
return;
}
if (strcmp(ev->key, "2") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_vertical, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "vertical");
return;
}
if (strcmp(ev->key, "3") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_homogeneous_horizontal, NULL,
NULL);
fprintf(stdout, "Applying '%s' layout on the box\n",
"horizontal homogeneous");
return;
}
if (strcmp(ev->key, "4") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_homogeneous_vertical, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n",
"vertical homogeneous");
return;
}
if (strcmp(ev->key, "5") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_homogeneous_max_size_horizontal,
NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n",
"horizontal maximum size homogeneous");
return;
}
if (strcmp(ev->key, "6") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_homogeneous_max_size_vertical,
NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n",
"vertical maximum size homogeneous");
return;
}
if (strcmp(ev->key, "7") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_flow_horizontal, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "horizontal flow");
return;
}
if (strcmp(ev->key, "8") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_flow_vertical, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "vertical flow");
return;
}
if (strcmp(ev->key, "9") == 0)
{
evas_object_box_layout_set(
d.box, evas_object_box_layout_stack, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "stack");
return;
}
if (strcmp(ev->key, "0") == 0)
{
evas_object_box_layout_set(d.box, _custom_layout, NULL, NULL);
fprintf(stdout, "Applying '%s' layout on the box\n", "CUSTOM");
return;
}
}
static void
_on_delete(Ecore_Evas *ee EINA_UNUSED)
{
ecore_main_loop_quit();
}
static void /* adjust canvas' contents on resizes */
_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);
evas_object_move(d.box, (w / 4), (h / 4));
evas_object_resize(d.box, (w / 2), (h / 2));
evas_object_move(d.border, (w / 4) - 2, (h / 4) - 2);
evas_object_resize(d.border, (w / 2) + 4, (h / 2) + 4);
}
int
main(void)
{
Evas_Object *last, *o;
int i;
srand(time(NULL));
if (!ecore_evas_init())
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 panic;
ecore_evas_callback_delete_request_set(d.ee, _on_delete);
ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
ecore_evas_show(d.ee);
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_show(d.bg);
evas_object_focus_set(d.bg, EINA_TRUE);
evas_object_event_callback_add(
d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
d.box = evas_object_box_add(d.evas);
evas_object_show(d.box);
for (i = 1; i <= 5; i++)
{
o = last = evas_object_rectangle_add(d.evas);
evas_object_size_hint_min_set(o, 50, 50);
evas_object_color_set(
o, rand() % 256, rand() % 256, rand() % 256, 255);
evas_object_show(o);
if (!evas_object_box_append(d.box, o))
{
fprintf(stderr, "Error appending child object on the box!\n");
goto error;
}
}
/* this is a border around the box, container of the rectangles we
* are going to experiment with. this way you can see how the
* container relates to the children */
d.border = evas_object_image_filled_add(d.evas);
evas_object_image_file_set(d.border, border_img_path, NULL);
evas_object_image_border_set(d.border, 2, 2, 2, 2);
evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);
evas_object_show(d.border);
fprintf(stdout, "%s", commands);
_canvas_resize_cb(d.ee);
ecore_main_loop_begin();
ecore_evas_shutdown();
return 0;
error:
ecore_evas_shutdown();
return -1;
panic:
fprintf(stderr, "You got to have at least one evas engine built and linked"
" up to ecore-evas for this example to run properly.\n");
return -2;
}