evas-text.c
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <stdio.h>
#include <errno.h>
#define WIDTH (320)
#define HEIGHT (240)
#define GREY {190, 190, 190, 255}
#define BLACK {0, 0, 0, 255}
#define WHITE {255, 255, 255, 255}
#define RED {255, 0, 0, 255}
#define GREEN {0, 255, 0, 255}
#define BLUE {0, 0, 255, 255}
#define POINTER_CYCLE(_ptr, _array) \
do \
{ \
if ((unsigned int)(((unsigned char *)(_ptr)) - ((unsigned char *)(_array))) >= \
sizeof(_array)) \
_ptr = _array; \
} \
while(0)
static const char *commands = \
"commands are:\n"
"\tt - change text's current style\n"
"\tz - change text's font size\n"
"\tf - change text's font family\n"
"\tb - change text's base color\n"
"\ts - change text's \'shadow\' color\n"
"\to - change text's \'outline\' color\n"
"\tw - change text's \'glow\' color\n"
"\tg - change text's \'glow 2\' color\n"
"\th - print help\n";
static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
struct color_tuple
{
int r, g, b, a;
};
struct text_preset_data
{
const char **font_ptr;
const char *font[3];
struct color_tuple *text_ptr;
struct color_tuple text[6];
struct color_tuple *shadow_ptr;
struct color_tuple shadow[4];
struct color_tuple *outline_ptr;
struct color_tuple outline[4];
struct color_tuple *glow_ptr;
struct color_tuple glow[4];
struct color_tuple *glow2_ptr;
struct color_tuple glow2[4];
};
struct test_data
{
Ecore_Evas *ee;
Evas *evas;
struct text_preset_data t_data;
Evas_Object *text, *bg, *border;
};
static struct test_data d = {0};
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
_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);
}
static const char *
_text_style_type_to_str(Evas_Text_Style_Type mode)
{
switch (mode)
{
case EVAS_TEXT_STYLE_PLAIN:
return "plain";
case EVAS_TEXT_STYLE_SHADOW:
return "shadow";
case EVAS_TEXT_STYLE_OUTLINE:
return "outline";
case EVAS_TEXT_STYLE_SOFT_OUTLINE:
return "soft outline";
case EVAS_TEXT_STYLE_GLOW:
return "glow";
case EVAS_TEXT_STYLE_OUTLINE_SHADOW:
return "outline shadow";
case EVAS_TEXT_STYLE_FAR_SHADOW:
return "far shadow";
case EVAS_TEXT_STYLE_OUTLINE_SOFT_SHADOW:
return "outline soft shadow";
case EVAS_TEXT_STYLE_SOFT_SHADOW:
return "soft shadow";
case EVAS_TEXT_STYLE_FAR_SOFT_SHADOW:
return "far soft shadow";
default:
return "invalid";
}
}
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;
if (strcmp(ev->key, "h") == 0) /* print help */
{
fprintf(stdout, commands);
return;
}
if (strcmp(ev->key, "t") == 0) /* change text's current style */
{
Evas_Text_Style_Type type = evas_object_text_style_get(d.text);
type = (type + 1) % 10;
evas_object_text_style_set(d.text, type);
fprintf(stdout, "Changing text's style to \'%s\'\n",
_text_style_type_to_str(type));
return;
}
if (strcmp(ev->key, "f") == 0) /* change text's font */
{
int sz;
(d.t_data.font_ptr)++;
evas_object_text_font_get(d.text, NULL, &sz);
POINTER_CYCLE(d.t_data.font_ptr, d.t_data.font);
evas_object_text_font_set(d.text, *d.t_data.font_ptr, sz);
fprintf(stdout, "Changing text's font to %s\n", *d.t_data.font_ptr);
return;
}
if (strcmp(ev->key, "b") == 0) /* change text's base color */
{
(d.t_data.text_ptr)++;
POINTER_CYCLE(d.t_data.text_ptr, d.t_data.text);
evas_object_color_set(
d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
d.t_data.text_ptr->b, d.t_data.text_ptr->a);
fprintf(stdout, "Changing base color for text to (%d, %d, %d, %d)\n",
d.t_data.text_ptr->r, d.t_data.text_ptr->g,
d.t_data.text_ptr->b, d.t_data.text_ptr->a);
return;
}
if (strcmp(ev->key, "g") == 0) /* change text's glow 2 color */
{
(d.t_data.glow2_ptr)++;
POINTER_CYCLE(d.t_data.glow2_ptr, d.t_data.glow2);
evas_object_text_glow2_color_set(
d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
fprintf(stdout, "Changing glow 2 color for text to (%d, %d, %d, %d)\n",
d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
return;
}
if (strcmp(ev->key, "w") == 0) /* change text's glow color */
{
(d.t_data.glow_ptr)++;
POINTER_CYCLE(d.t_data.glow_ptr, d.t_data.glow);
evas_object_text_glow_color_set(
d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
fprintf(stdout, "Changing glow color for text to (%d, %d, %d, %d)\n",
d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
return;
}
if (strcmp(ev->key, "o") == 0) /* change text's outline color */
{
(d.t_data.outline_ptr)++;
POINTER_CYCLE(d.t_data.outline_ptr, d.t_data.outline);
evas_object_text_outline_color_set(
d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
fprintf(stdout, "Changing outline color for text to (%d, %d, %d, %d)\n",
d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
return;
}
if (strcmp(ev->key, "s") == 0) /* change text's shadow color */
{
(d.t_data.shadow_ptr)++;
POINTER_CYCLE(d.t_data.shadow_ptr, d.t_data.shadow);
evas_object_text_shadow_color_set(
d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
fprintf(stdout, "Changing shadow color for text to (%d, %d, %d, %d)\n",
d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
return;
}
if (strcmp(ev->key, "z") == 0) /* change text's font size */
{
const char *font;
int size;
evas_object_text_font_get(d.text, &font, &size);
size = (size + 10) % 50;
if (!size) size = 10;
evas_object_text_font_set(d.text, font, size);
fprintf(stdout, "Changing text's font size to %d\n", size);
return;
}
}
int
main(void)
{
int size;
const char *font;
if (!ecore_evas_init())
return EXIT_FAILURE;
/* init values one is going to cycle through while running this
* example */
struct text_preset_data init_data =
{
.font = {"DejaVu", "Courier", "Utopia"},
.text = {BLACK, WHITE, GREY, RED, GREEN, BLUE},
.shadow = {WHITE, BLUE, GREEN, RED},
.outline = {WHITE, RED, GREEN, BLUE},
.glow = {WHITE, BLUE, GREEN, RED},
.glow2 = {WHITE, RED, BLUE, GREEN}
};
d.t_data = init_data;
d.t_data.font_ptr = d.t_data.font;
d.t_data.text_ptr = d.t_data.text;
d.t_data.glow_ptr = d.t_data.glow;
d.t_data.glow2_ptr = d.t_data.glow2;
d.t_data.outline_ptr = d.t_data.outline;
d.t_data.shadow_ptr = d.t_data.shadow;
/* this will give you a window with an Evas canvas under the first
* engine available */
d.ee = ecore_evas_new(NULL, 10, 10, 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);
ecore_evas_show(d.ee);
/* 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 */
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.text = evas_object_text_add(d.evas);
evas_object_text_style_set(d.text, EVAS_TEXT_STYLE_PLAIN);
/* let the pre-set thingies be enforced */
evas_object_color_set(
d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
d.t_data.text_ptr->b, d.t_data.text_ptr->a);
evas_object_text_glow_color_set(
d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
evas_object_text_glow2_color_set(
d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
evas_object_text_outline_color_set(
d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
evas_object_text_shadow_color_set(
d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
evas_object_text_font_set(d.text, *d.t_data.font_ptr, 30);
evas_object_text_text_set(d.text, "sample text");
evas_object_resize(d.text, (3 * WIDTH) / 4, HEIGHT / 4);
evas_object_move(d.text, WIDTH / 8, (3 * HEIGHT) / 8);
evas_object_show(d.text);
evas_object_text_font_get(d.text, &font, &size);
fprintf(stdout, "Adding text object with font %s, size %d\n", font, size);
/* this is a border around the text object above, here just to
* emphasize its geometry */
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, 3, 3, 3, 3);
evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);
evas_object_resize(d.border, ((3 * WIDTH) / 4) + 3, (HEIGHT / 4) + 3);
evas_object_move(d.border, (WIDTH / 8) - 3, ((3 * HEIGHT) / 8) - 3);
evas_object_show(d.border);
fprintf(stdout, commands);
ecore_main_loop_begin();
ecore_evas_free(d.ee);
ecore_evas_shutdown();
return 0;
error:
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");
ecore_evas_shutdown();
return -1;
}