412 lines
11 KiB
C
412 lines
11 KiB
C
/**
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* Simple Evas example illustrating text objects
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*
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* You'll need at least one engine built for it (excluding the buffer
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* one). See stdout/stderr for output.
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*
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* @verbatim
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* gcc -o evas-text evas-text.c `pkg-config --libs --cflags evas ecore ecore-evas`
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* @endverbatim
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#else
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#define PACKAGE_EXAMPLES_DIR "."
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#define __UNUSED__
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#endif
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <stdio.h>
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#include <errno.h>
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#define WIDTH (320)
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#define HEIGHT (240)
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#define GREY {190, 190, 190, 255}
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#define BLACK {0, 0, 0, 255}
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#define WHITE {255, 255, 255, 255}
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#define RED {255, 0, 0, 255}
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#define GREEN {0, 255, 0, 255}
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#define BLUE {0, 0, 255, 255}
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#define POINTER_CYCLE(_ptr, _array) \
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do \
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{ \
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if ((unsigned)(((void *)(_ptr)) - ((void *)(_array))) >= \
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sizeof(_array)) \
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_ptr = _array; \
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} \
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while(0)
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static const char *commands = \
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"commands are:\n"
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"\tt - change text's current style\n"
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"\tz - change text's font size\n"
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"\tf - change text's font family\n"
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"\tb - change text's base color\n"
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"\ts - change text's \'shadow\' color\n"
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"\to - change text's \'outline\' color\n"
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"\tw - change text's \'glow\' color\n"
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"\tg - change text's \'glow 2\' color\n"
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"\th - print help\n";
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static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
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struct color_tuple
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{
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int r, g, b, a;
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};
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struct text_preset_data
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{
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const char **font_ptr;
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const char *font[3];
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struct color_tuple *text_ptr;
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struct color_tuple text[6];
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struct color_tuple *shadow_ptr;
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struct color_tuple shadow[4];
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struct color_tuple *outline_ptr;
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struct color_tuple outline[4];
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struct color_tuple *glow_ptr;
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struct color_tuple glow[4];
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struct color_tuple *glow2_ptr;
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struct color_tuple glow2[4];
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};
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struct test_data
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{
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Ecore_Evas *ee;
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Evas *evas;
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struct text_preset_data t_data;
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Evas_Object *text, *bg, *border;
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};
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static struct test_data d = {0};
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static void
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_on_destroy(Ecore_Evas *ee __UNUSED__)
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{
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ecore_main_loop_quit();
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}
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/* here just to keep our example's window size and background image's
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* size in synchrony */
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static void
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_canvas_resize_cb(Ecore_Evas *ee)
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{
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int w, h;
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ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
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evas_object_resize(d.bg, w, h);
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}
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static const char *
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_text_style_type_to_str(Evas_Text_Style_Type mode)
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{
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switch (mode)
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{
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case EVAS_TEXT_STYLE_PLAIN:
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return "plain";
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case EVAS_TEXT_STYLE_SHADOW:
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return "shadow";
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case EVAS_TEXT_STYLE_OUTLINE:
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return "outline";
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case EVAS_TEXT_STYLE_SOFT_OUTLINE:
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return "soft outline";
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case EVAS_TEXT_STYLE_GLOW:
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return "glow";
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case EVAS_TEXT_STYLE_OUTLINE_SHADOW:
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return "outline shadow";
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case EVAS_TEXT_STYLE_FAR_SHADOW:
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return "far shadow";
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case EVAS_TEXT_STYLE_OUTLINE_SOFT_SHADOW:
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return "outline soft shadow";
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case EVAS_TEXT_STYLE_SOFT_SHADOW:
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return "soft shadow";
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case EVAS_TEXT_STYLE_FAR_SOFT_SHADOW:
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return "far soft shadow";
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default:
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return "invalid";
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}
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}
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static void
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_on_keydown(void *data __UNUSED__,
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Evas *evas __UNUSED__,
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Evas_Object *o __UNUSED__,
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void *einfo)
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{
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Evas_Event_Key_Down *ev = einfo;
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if (strcmp(ev->keyname, "h") == 0) /* print help */
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{
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fprintf(stdout, commands);
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return;
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}
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if (strcmp(ev->keyname, "t") == 0) /* change text's current style */
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{
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Evas_Text_Style_Type type = evas_object_text_style_get(d.text);
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type = (type + 1) % 10;
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evas_object_text_style_set(d.text, type);
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fprintf(stdout, "Changing text's style to \'%s\'\n",
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_text_style_type_to_str(type));
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return;
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}
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if (strcmp(ev->keyname, "f") == 0) /* change text's font */
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{
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int sz;
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(d.t_data.font_ptr)++;
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evas_object_text_font_get(d.text, NULL, &sz);
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POINTER_CYCLE(d.t_data.font_ptr, d.t_data.font);
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evas_object_text_font_set(d.text, *d.t_data.font_ptr, sz);
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fprintf(stdout, "Changing text's font to %s\n", *d.t_data.font_ptr);
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return;
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}
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if (strcmp(ev->keyname, "b") == 0) /* change text's base color */
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{
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(d.t_data.text_ptr)++;
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POINTER_CYCLE(d.t_data.text_ptr, d.t_data.text);
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evas_object_color_set(
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d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
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d.t_data.text_ptr->b, d.t_data.text_ptr->a);
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fprintf(stdout, "Changing base color for text to (%d, %d, %d, %d)\n",
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d.t_data.text_ptr->r, d.t_data.text_ptr->g,
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d.t_data.text_ptr->b, d.t_data.text_ptr->a);
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return;
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}
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if (strcmp(ev->keyname, "g") == 0) /* change text's glow 2 color */
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{
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(d.t_data.glow2_ptr)++;
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POINTER_CYCLE(d.t_data.glow2_ptr, d.t_data.glow2);
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evas_object_text_glow2_color_set(
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d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
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d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
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fprintf(stdout, "Changing glow 2 color for text to (%d, %d, %d, %d)\n",
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d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
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d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
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return;
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}
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if (strcmp(ev->keyname, "w") == 0) /* change text's glow color */
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{
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(d.t_data.glow_ptr)++;
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POINTER_CYCLE(d.t_data.glow_ptr, d.t_data.glow);
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evas_object_text_glow_color_set(
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d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
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d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
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fprintf(stdout, "Changing glow color for text to (%d, %d, %d, %d)\n",
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d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
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d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
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return;
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}
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if (strcmp(ev->keyname, "o") == 0) /* change text's outline color */
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{
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(d.t_data.outline_ptr)++;
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POINTER_CYCLE(d.t_data.outline_ptr, d.t_data.outline);
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evas_object_text_outline_color_set(
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d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
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d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
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fprintf(stdout, "Changing outline color for text to (%d, %d, %d, %d)\n",
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d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
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d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
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return;
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}
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if (strcmp(ev->keyname, "s") == 0) /* change text's shadow color */
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{
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(d.t_data.shadow_ptr)++;
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POINTER_CYCLE(d.t_data.shadow_ptr, d.t_data.shadow);
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evas_object_text_shadow_color_set(
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d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
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d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
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fprintf(stdout, "Changing shadow color for text to (%d, %d, %d, %d)\n",
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d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
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d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
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return;
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}
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if (strcmp(ev->keyname, "z") == 0) /* change text's font size */
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{
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const char *font;
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int size;
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evas_object_text_font_get(d.text, &font, &size);
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size = (size + 10) % 50;
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if (!size) size = 10;
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evas_object_text_font_set(d.text, font, size);
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fprintf(stdout, "Changing text's font size to %d\n", size);
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return;
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}
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}
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int
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main(void)
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{
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int size;
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const char *font;
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if (!ecore_evas_init())
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return EXIT_FAILURE;
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/* init values one is going to cycle through while running this
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* example */
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struct text_preset_data init_data =
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{
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.font = {"DejaVu", "Courier", "Utopia"},
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.text = {BLACK, WHITE, GREY, RED, GREEN, BLUE},
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.shadow = {WHITE, BLUE, GREEN, RED},
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.outline = {WHITE, RED, GREEN, BLUE},
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.glow = {WHITE, BLUE, GREEN, RED},
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.glow2 = {WHITE, RED, BLUE, GREEN}
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};
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d.t_data = init_data;
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d.t_data.font_ptr = d.t_data.font;
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d.t_data.text_ptr = d.t_data.text;
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d.t_data.glow_ptr = d.t_data.glow;
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d.t_data.glow2_ptr = d.t_data.glow2;
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d.t_data.outline_ptr = d.t_data.outline;
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d.t_data.shadow_ptr = d.t_data.shadow;
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/* this will give you a window with an Evas canvas under the first
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* engine available */
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d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
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if (!d.ee)
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goto error;
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ecore_evas_callback_destroy_set(d.ee, _on_destroy);
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ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
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ecore_evas_show(d.ee);
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/* the canvas pointer, de facto */
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d.evas = ecore_evas_get(d.ee);
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d.bg = evas_object_rectangle_add(d.evas);
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evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
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evas_object_move(d.bg, 0, 0); /* at canvas' origin */
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evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
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evas_object_show(d.bg);
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evas_object_focus_set(d.bg, EINA_TRUE);
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evas_object_event_callback_add(
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d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
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d.text = evas_object_text_add(d.evas);
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evas_object_text_style_set(d.text, EVAS_TEXT_STYLE_PLAIN);
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/* let the pre-set thingies be enforced */
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evas_object_color_set(
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d.text, d.t_data.text_ptr->r, d.t_data.text_ptr->g,
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d.t_data.text_ptr->b, d.t_data.text_ptr->a);
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evas_object_text_glow_color_set(
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d.text, d.t_data.glow_ptr->r, d.t_data.glow_ptr->g,
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d.t_data.glow_ptr->b, d.t_data.glow_ptr->a);
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evas_object_text_glow2_color_set(
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d.text, d.t_data.glow2_ptr->r, d.t_data.glow2_ptr->g,
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d.t_data.glow2_ptr->b, d.t_data.glow2_ptr->a);
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evas_object_text_outline_color_set(
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d.text, d.t_data.outline_ptr->r, d.t_data.outline_ptr->g,
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d.t_data.outline_ptr->b, d.t_data.outline_ptr->a);
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evas_object_text_shadow_color_set(
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d.text, d.t_data.shadow_ptr->r, d.t_data.shadow_ptr->g,
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d.t_data.shadow_ptr->b, d.t_data.shadow_ptr->a);
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evas_object_text_font_set(d.text, *d.t_data.font_ptr, 30);
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evas_object_text_text_set(d.text, "sample text");
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evas_object_resize(d.text, (3 * WIDTH) / 4, HEIGHT / 4);
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evas_object_move(d.text, WIDTH / 8, (3 * HEIGHT) / 8);
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evas_object_show(d.text);
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evas_object_text_font_get(d.text, &font, &size);
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fprintf(stdout, "Adding text object with font %s, size %d\n", font, size);
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/* this is a border around the text object above, here just to
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* emphasize its geometry */
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d.border = evas_object_image_filled_add(d.evas);
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evas_object_image_file_set(d.border, border_img_path, NULL);
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evas_object_image_border_set(d.border, 3, 3, 3, 3);
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evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);
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evas_object_resize(d.border, ((3 * WIDTH) / 4) + 3, (HEIGHT / 4) + 3);
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evas_object_move(d.border, (WIDTH / 8) - 3, ((3 * HEIGHT) / 8) - 3);
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evas_object_show(d.border);
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fprintf(stdout, commands);
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ecore_main_loop_begin();
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ecore_evas_free(d.ee);
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ecore_evas_shutdown();
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return 0;
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error:
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fprintf(stderr, "you got to have at least one evas engine built and linked"
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" up to ecore-evas for this example to run properly.\n");
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ecore_evas_shutdown();
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return -1;
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}
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