From dd7595a3475407a7fa96a97393bae8c5220e8762 Mon Sep 17 00:00:00 2001 From: David Walter Seikel Date: Wed, 4 Jan 2012 18:41:13 +1000 Subject: Add the base Enlightenment Foundation Libraries - eina, eet, evas, ecore, embryo, and edje. Note that embryo wont be used, but I'm not sure yet if you can build edje without it. --- libraries/evas/src/examples/evas-smart-object.c | 708 ++++++++++++++++++++++++ 1 file changed, 708 insertions(+) create mode 100644 libraries/evas/src/examples/evas-smart-object.c (limited to 'libraries/evas/src/examples/evas-smart-object.c') diff --git a/libraries/evas/src/examples/evas-smart-object.c b/libraries/evas/src/examples/evas-smart-object.c new file mode 100644 index 0000000..8a36b62 --- /dev/null +++ b/libraries/evas/src/examples/evas-smart-object.c @@ -0,0 +1,708 @@ +/** + * Simple Evas example illustrating a custom Evas smart object + * + * You'll need at least one engine built for it (excluding the buffer + * one). See stdout/stderr for output. + * + * @verbatim + * gcc -o evas-smart-object evas-smart-object.c `pkg-config --libs --cflags evas ecore ecore-evas` + * @endverbatim + */ + +#ifdef HAVE_CONFIG_H + +#include "config.h" +#else + +#define PACKAGE_EXAMPLES_DIR "." +#define __UNUSED__ + +#endif + +#include +#include +#include +#include + +#define WIDTH (320) +#define HEIGHT (240) + +static const char *commands = \ + "commands are:\n" + "\tl - insert child rectangle on the left\n" + "\tr - insert child rectangle on the right\n" + "\tw - remove and delete all members from the smart object\n" + "\tright arrow - move smart object to the right\n" + "\tleft arrow - move smart object to the left\n" + "\tup arrow - move smart object up\n" + "\tdown arrow - move smart object down\n" + "\td - decrease smart object's size\n" + "\ti - increase smart object's size\n" + "\tc - change smart object's clipper color\n" + "\th - print help\n"; + +#define WHITE {255, 255, 255, 255} +#define RED {255, 0, 0, 255} +#define GREEN {0, 255, 0, 255} +#define BLUE {0, 0, 255, 255} + +struct test_data +{ + Ecore_Evas *ee; + Evas *evas; + Evas_Object *smt, *bg, *clipper, *rects[2]; +}; + +struct color_tuple +{ + int r, g, b, a; +} clipper_colors[4] = {WHITE, RED, GREEN, BLUE}; +int cur_color = 0; + +static const char * +_index_to_color(int i) +{ + switch (i) + { + case 0: + return "WHITE (default)"; + + case 1: + return "RED"; + + case 2: + return "GREEN"; + + case 3: + return "BLUE"; + + default: + return "other"; + } +} + +static struct test_data d = {0}; +static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png"; + +#define _evas_smart_example_type "Evas_Smart_Example" +#define EVT_CHILDREN_NUMBER_CHANGED "children,changed" + +static const Evas_Smart_Cb_Description _smart_callbacks[] = +{ + {EVT_CHILDREN_NUMBER_CHANGED, "i"}, + {NULL, NULL} +}; + +typedef struct _Evas_Smart_Example_Data Evas_Smart_Example_Data; +/* + * This structure augments clipped smart object's instance data, + * providing extra members required by our example smart object's + * implementation. + */ +struct _Evas_Smart_Example_Data +{ + Evas_Object_Smart_Clipped_Data base; + Evas_Object *children[2], *border; + int child_count; +}; + +#define EVAS_SMART_EXAMPLE_DATA_GET(o, ptr) \ + Evas_Smart_Example_Data * ptr = evas_object_smart_data_get(o) + +#define EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN(o, ptr) \ + EVAS_SMART_EXAMPLE_DATA_GET(o, ptr); \ + if (!ptr) \ + { \ + fprintf(stderr, "No widget data for object %p (%s)!", \ + o, evas_object_type_get(o)); \ + fflush(stderr); \ + abort(); \ + return; \ + } + +#define EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, ptr, val) \ + EVAS_SMART_EXAMPLE_DATA_GET(o, ptr); \ + if (!ptr) \ + { \ + fprintf(stderr, "No widget data for object %p (%s)!", \ + o, evas_object_type_get(o)); \ + fflush(stderr); \ + abort(); \ + return val; \ + } + +EVAS_SMART_SUBCLASS_NEW(_evas_smart_example_type, _evas_smart_example, + Evas_Smart_Class, Evas_Smart_Class, + evas_object_smart_clipped_class_get, _smart_callbacks); + +static void +_on_destroy(Ecore_Evas *ee __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 void +_on_child_del(void *data, + Evas *evas __UNUSED__, + Evas_Object *o, + void *einfo __UNUSED__) +{ + Evas_Object *example_smart = data; + int index; + + EVAS_SMART_EXAMPLE_DATA_GET(example_smart, priv); + + index = (int)evas_object_data_get(o, "index"); + index--; + + priv->children[index] = NULL; + + evas_object_smart_member_del(o); + evas_object_smart_changed(example_smart); +} + +static void +_evas_smart_example_child_callbacks_unregister(Evas_Object *obj) +{ + evas_object_data_set(obj, "index", NULL); + evas_object_event_callback_del(obj, EVAS_CALLBACK_FREE, _on_child_del); +} + +static void +_evas_smart_example_child_callbacks_register(Evas_Object *o, + Evas_Object *child, + int index) +{ + evas_object_event_callback_add(child, EVAS_CALLBACK_FREE, _on_child_del, o); + evas_object_data_set(child, "index", (void *)(++index)); +} + +/* create and setup a new example smart object's internals */ +static void +_evas_smart_example_smart_add(Evas_Object *o) +{ + EVAS_SMART_DATA_ALLOC(o, Evas_Smart_Example_Data); + + /* this is a border around the smart object's area, delimiting it */ + priv->border = evas_object_image_filled_add(evas_object_evas_get(o)); + evas_object_image_file_set(priv->border, border_img_path, NULL); + evas_object_image_border_set(priv->border, 3, 3, 3, 3); + evas_object_image_border_center_fill_set( + priv->border, EVAS_BORDER_FILL_NONE); + evas_object_smart_member_add(priv->border, o); + + _evas_smart_example_parent_sc->add(o); +} + +static void +_evas_smart_example_smart_del(Evas_Object *o) +{ + EVAS_SMART_EXAMPLE_DATA_GET(o, priv); + + if (priv->children[0]) + { + _evas_smart_example_child_callbacks_unregister(priv->children[0]); + priv->children[0] = NULL; + } + + if (priv->children[1]) + { + _evas_smart_example_child_callbacks_unregister(priv->children[1]); + priv->children[1] = NULL; + } + + _evas_smart_example_parent_sc->del(o); +} + +static void +_evas_smart_example_smart_show(Evas_Object *o) +{ + EVAS_SMART_EXAMPLE_DATA_GET(o, priv); + + if (priv->children[0]) evas_object_show(priv->children[0]); + if (priv->children[1]) evas_object_show(priv->children[1]); + evas_object_show(priv->border); + + _evas_smart_example_parent_sc->show(o); +} + +static void +_evas_smart_example_smart_hide(Evas_Object *o) +{ + EVAS_SMART_EXAMPLE_DATA_GET(o, priv); + + if (priv->children[0]) evas_object_hide(priv->children[0]); + if (priv->children[1]) evas_object_hide(priv->children[1]); + evas_object_hide(priv->border); + + _evas_smart_example_parent_sc->hide(o); +} + +static void +_evas_smart_example_smart_resize(Evas_Object *o, + Evas_Coord w, + Evas_Coord h) +{ + Evas_Coord ow, oh; + evas_object_geometry_get(o, NULL, NULL, &ow, &oh); + if ((ow == w) && (oh == h)) return; + + /* this will trigger recalculation */ + evas_object_smart_changed(o); +} + +/* act on child objects' properties, before rendering */ +static void +_evas_smart_example_smart_calculate(Evas_Object *o) +{ + Evas_Coord x, y, w, h; + + EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN(o, priv); + evas_object_geometry_get(o, &x, &y, &w, &h); + + evas_object_resize(priv->border, w, h); + evas_object_move(priv->border, x, y); + + if (priv->children[0]) + { + evas_object_move(priv->children[0], x + 3, y + 3); + evas_object_resize(priv->children[0], (w / 2) - 3, (h / 2) - 3); + } + + if (priv->children[1]) + { + evas_object_move(priv->children[1], x + (w / 2), y + (h / 2)); + evas_object_resize(priv->children[1], (w / 2) - 3, (h / 2) - 3); + } +} + +/* setting our smart interface */ +static void +_evas_smart_example_smart_set_user(Evas_Smart_Class *sc) +{ + /* specializing these two */ + sc->add = _evas_smart_example_smart_add; + sc->del = _evas_smart_example_smart_del; + sc->show = _evas_smart_example_smart_show; + sc->hide = _evas_smart_example_smart_hide; + + /* clipped smart object has no hook on resizes or calculations */ + sc->resize = _evas_smart_example_smart_resize; + sc->calculate = _evas_smart_example_smart_calculate; +} + +/* BEGINS example smart object's own interface */ + +/* add a new example smart object to a canvas */ +Evas_Object * +evas_smart_example_add(Evas *evas) +{ + return evas_object_smart_add(evas, _evas_smart_example_smart_class_new()); +} + +static void +_evas_smart_example_remove_do(Evas_Smart_Example_Data *priv, + Evas_Object *child, + int index) +{ + priv->children[index] = NULL; + priv->child_count--; + _evas_smart_example_child_callbacks_unregister(child); + evas_object_smart_member_del(child); +} + +/* remove a child element, return its pointer (or NULL on errors) */ +Evas_Object * +evas_smart_example_remove(Evas_Object *o, + Evas_Object *child) +{ + int index; + + EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL); + + if (priv->children[0] != child && priv->children[1] != child) + { + fprintf(stderr, "You are trying to remove something not belonging to" + " the example smart object!\n"); + return NULL; + } + + index = (int)evas_object_data_get(child, "index"); + index--; + + _evas_smart_example_remove_do(priv, child, index); + + evas_object_smart_callback_call( + o, EVT_CHILDREN_NUMBER_CHANGED, (void *)priv->child_count); + evas_object_smart_changed(o); + + return child; +} + +/* set to return any previous object set to the left position of the + * smart object or NULL, if any (or on errors) */ +Evas_Object * +evas_smart_example_set_left(Evas_Object *o, + Evas_Object *child) +{ + Evas_Object *ret = NULL; + + EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL); + if (!child) + return NULL; + + if (priv->children[1] == child) + { + fprintf(stderr, "You mustn't place a child on both slots of" + " the example smart object!\n"); + return NULL; + } + + if (priv->children[0]) + { + if (priv->children[0] != child) + { + ret = priv->children[0]; + _evas_smart_example_remove_do(priv, priv->children[0], 0); + } + else return child; + } + + priv->children[0] = child; + _evas_smart_example_child_callbacks_register(o, child, 0); + evas_object_smart_member_add(child, o); + evas_object_smart_changed(o); + + priv->child_count++; + if (!ret) + { + evas_object_smart_callback_call( + o, EVT_CHILDREN_NUMBER_CHANGED, (void *)priv->child_count); + } + + return ret; +} + +/* set to return any previous object set to the right position of the + * smart object or NULL, if any (or on errors) */ +Evas_Object * +evas_smart_example_set_right(Evas_Object *o, + Evas_Object *child) +{ + Evas_Object *ret = NULL; + + EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL); + if (!child) + return NULL; + + if (priv->children[0] == child) + { + fprintf(stderr, "You mustn't place a child on both slots of" + " the example smart object!\n"); + return NULL; + } + + if (priv->children[1]) + { + if (priv->children[1] != child) + { + ret = priv->children[1]; + _evas_smart_example_remove_do(priv, priv->children[1], 1); + } + else return child; + } + + priv->children[1] = child; + _evas_smart_example_child_callbacks_register(o, child, 1); + evas_object_smart_member_add(child, o); + evas_object_smart_changed(o); + + priv->child_count++; + if (!ret) + { + evas_object_smart_callback_call( + o, EVT_CHILDREN_NUMBER_CHANGED, (void *)priv->child_count); + } + + return ret; +} + +/* END OF example smart object's own interface */ + +static void +_on_keydown(void *data __UNUSED__, + Evas *evas __UNUSED__, + Evas_Object *o __UNUSED__, + void *einfo) +{ + Evas_Event_Key_Down *ev = einfo; + + if (strcmp(ev->keyname, "h") == 0) /* print help */ + { + fprintf(stdout, commands); + return; + } + + if (strcmp(ev->keyname, "w") == 0) /* clear out smart object (WRT members) */ + { + if (d.rects[0]) + { + evas_smart_example_remove(d.smt, d.rects[0]); + evas_object_del(d.rects[0]); + } + if (d.rects[1]) + { + evas_smart_example_remove(d.smt, d.rects[1]); + evas_object_del(d.rects[1]); + } + + memset(d.rects, 0, sizeof(d.rects)); + + fprintf(stdout, "Deleting all members of the smart object.\n"); + + return; + } + + if (strcmp(ev->keyname, "l") == 0) /* insert random colored + * rectangle on the left */ + { + Evas_Object *rect = evas_object_rectangle_add(d.evas), *prev; + evas_object_color_set( + rect, rand() % 255, rand() % 255, rand() % 255, 255); + evas_object_show(rect); + + prev = evas_smart_example_set_left(d.smt, rect); + d.rects[0] = rect; + + fprintf(stdout, "Setting smart object's left spot with a new" + " rectangle.\n"); + fprintf(stdout, "Checking its new smart object parent: %s\n", + evas_object_smart_parent_get(rect) == d.smt ? "OK!" : + "Failure!"); + if (prev) + { + int r, g, b; + + evas_object_color_get(prev, &r, &g, &b, NULL); + fprintf(stdout, "Deleting previous left child," + " which had colors (%d, %d, %d)\n", r, g, b); + evas_object_del(prev); + } + + return; + } + + if (strcmp(ev->keyname, "r") == 0) /* insert random colored + * rectangle on the right */ + { + Evas_Object *rect = evas_object_rectangle_add(d.evas), *prev; + evas_object_color_set( + rect, rand() % 255, rand() % 255, rand() % 255, 255); + evas_object_show(rect); + + prev = evas_smart_example_set_right(d.smt, rect); + d.rects[1] = rect; + + fprintf(stdout, "Setting smart object's right spot with a new" + " rectangle.\n"); + fprintf(stdout, "Checking its new smart object parent: %s\n", + evas_object_smart_parent_get(rect) == d.smt ? "OK!" : + "Failure!"); + if (prev) + { + int r, g, b; + + evas_object_color_get(prev, &r, &g, &b, NULL); + fprintf(stdout, "Deleting previous right child," + " which had colors (%d, %d, %d)\n", r, g, b); + evas_object_del(prev); + } + + return; + } + + /* move smart object along the canvas */ + if (strcmp(ev->keyname, "Right") == 0 || strcmp(ev->keyname, "Left") == 0 || + strcmp(ev->keyname, "Up") == 0 || strcmp(ev->keyname, "Down") == 0) + { + Evas_Coord x, y; + + evas_object_geometry_get(d.smt, &x, &y, NULL, NULL); + + switch (ev->keyname[0]) + { + case 'R': + x += 20; + break; + + case 'L': + x -= 20; + break; + + case 'U': + y -= 20; + break; + + case 'D': + y += 20; + break; + } + + evas_object_move(d.smt, x, y); + + return; + } + + /* increase smart object's size */ + if (strcmp(ev->keyname, "i") == 0) + { + Evas_Coord w, h; + + evas_object_geometry_get(d.smt, NULL, NULL, &w, &h); + + w *= 1.1; + h *= 1.1; + + evas_object_resize(d.smt, w, h); + + return; + } + + /* decrease smart object's size */ + if (strcmp(ev->keyname, "d") == 0) + { + Evas_Coord w, h; + + evas_object_geometry_get(d.smt, NULL, NULL, &w, &h); + + w *= 0.9; + h *= 0.9; + + evas_object_resize(d.smt, w, h); + + return; + } + + /* change smart object's clipper color */ + if (strcmp(ev->keyname, "c") == 0) + { + cur_color = (cur_color + 1) % 4; + + evas_object_color_set( + d.clipper, clipper_colors[cur_color].r, clipper_colors[cur_color].g, + clipper_colors[cur_color].b, clipper_colors[cur_color].a); + + fprintf (stderr, "Changing clipper's color to %s\n", + _index_to_color(cur_color)); + + return; + } +} + +static void /* callback on number of member objects changed */ +_on_example_smart_object_child_num_change(void *data __UNUSED__, + Evas_Object *obj __UNUSED__, + void *event_info) +{ + fprintf(stdout, "Number of child members on our example smart" + " object changed to %d\n", (int)event_info); +} + +int +main(void) +{ + const Evas_Smart_Cb_Description **descriptions; + unsigned int count; + Eina_Bool ret; + + 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, 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); + evas_object_move(d.bg, 0, 0); + evas_object_resize(d.bg, WIDTH, HEIGHT); + evas_object_show(d.bg); + + d.smt = evas_smart_example_add(d.evas); + evas_object_move(d.smt, WIDTH / 4, HEIGHT / 4); + evas_object_resize(d.smt, WIDTH / 2, HEIGHT / 2); + evas_object_show(d.smt); + + ret = evas_object_smart_type_check(d.smt, _evas_smart_example_type); + fprintf(stdout, "Adding smart object of type \"%s\" to the canvas: %s.\n", + _evas_smart_example_type, ret ? "success" : "failure"); + + d.clipper = evas_object_smart_clipped_clipper_get(d.smt); + fprintf(stdout, "Checking if clipped smart object's clipper is a " + "\"static\" one: %s\n", evas_object_static_clip_get( + d.clipper) ? "yes" : "no"); + + evas_object_color_set( + d.clipper, clipper_colors[cur_color].r, clipper_colors[cur_color].g, + clipper_colors[cur_color].b, clipper_colors[cur_color].a); + + evas_object_smart_callbacks_descriptions_get( + d.smt, &descriptions, &count, NULL, NULL); + + for (; *descriptions; descriptions++) + { + fprintf(stdout, "We've found a smart callback on the smart object!" + "\n\tname: %s\n\ttype: %s\n", (*descriptions)->name, + (*descriptions)->type); + + if (strcmp((*descriptions)->type, "i")) continue; + /* we know we don't have other types of smart callbacks + * here, just playing with it */ + + /* for now, we know the only one callback is the one + * reporting number of member objects changed on the + * example smart object */ + evas_object_smart_callback_add( + d.smt, (*descriptions)->name, + _on_example_smart_object_child_num_change, NULL); + } + + evas_object_focus_set(d.bg, EINA_TRUE); + evas_object_event_callback_add( + d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL); + + 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; +} -- cgit v1.1