787 lines
22 KiB
C
787 lines
22 KiB
C
/**
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* Simple Evas example illustrating Evas smart interfaces
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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-smart-interface evas-smart-interface.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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#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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static const char *commands = \
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"commands are:\n"
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"\tl - insert child rectangle on the left\n"
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"\tr - insert child rectangle on the right\n"
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"\tw - remove and delete all members from the smart object\n"
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"\tright arrow - move smart object to the right\n"
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"\tleft arrow - move smart object to the left\n"
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"\tup arrow - move smart object up\n"
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"\tdown arrow - move smart object down\n"
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"\td - decrease smart object's size\n"
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"\ti - increase smart object's size\n"
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"\tc - change smart object's clipper color\n"
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"\th - print help\n"
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"\tq - quit\n"
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;
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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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struct test_data
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{
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Ecore_Evas *ee;
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Evas *evas;
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Evas_Object *smt, *bg, *clipper, *rects[2];
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};
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struct color_tuple
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{
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int r, g, b, a;
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} clipper_colors[4] = {WHITE, RED, GREEN, BLUE};
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int cur_color = 0;
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static const char *
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_index_to_color(int i)
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{
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switch (i)
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{
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case 0:
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return "WHITE (default)";
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case 1:
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return "RED";
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case 2:
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return "GREEN";
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case 3:
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return "BLUE";
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default:
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return "other";
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}
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}
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static struct test_data d = {0};
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static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
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#define _evas_smart_example_type "Evas_Smart_Example"
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static const char iface1_data[] = "iface1_data";
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static const char IFACE1_NAME[] = "iface1";
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static Eina_Bool _iface1_add(Evas_Object *);
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static void _iface1_del(Evas_Object *);
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static void _iface1_custom_fn(Evas_Object *);
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typedef struct _Evas_Smart_Example_Interface Evas_Smart_Example_Interface;
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struct _Evas_Smart_Example_Interface
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{
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Evas_Smart_Interface base;
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void (*example_func)(Evas_Object *obj);
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};
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static Evas_Smart_Example_Interface iface1;
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static Eina_Bool
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_iface1_add(Evas_Object *obj EINA_UNUSED)
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{
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printf("iface1's add()!\n");
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return EINA_TRUE;
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}
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static void
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_iface1_del(Evas_Object *obj)
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{
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printf("iface1's del()! Data is %s\n",
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(char *)evas_object_smart_interface_data_get
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(obj, (Evas_Smart_Interface *)&iface1));
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}
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static void
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_iface1_custom_fn(Evas_Object *obj EINA_UNUSED)
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{
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printf("iface1's custom_fn()!\n");
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}
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static const Evas_Smart_Interface *_smart_interfaces[] =
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{
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(Evas_Smart_Interface *)&iface1, NULL
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};
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#define EVT_CHILDREN_NUMBER_CHANGED "children,changed"
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static const Evas_Smart_Cb_Description _smart_callbacks[] =
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{
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{EVT_CHILDREN_NUMBER_CHANGED, "i"},
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{NULL, NULL}
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};
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typedef struct _Evas_Smart_Example_Data Evas_Smart_Example_Data;
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/*
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* This structure augments clipped smart object's instance data,
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* providing extra members required by our example smart object's
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* implementation.
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*/
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struct _Evas_Smart_Example_Data
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{
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Evas_Object_Smart_Clipped_Data base;
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Evas_Object *children[2], *border;
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int child_count;
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};
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#define EVAS_SMART_EXAMPLE_DATA_GET(o, ptr) \
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Evas_Smart_Example_Data * ptr = evas_object_smart_data_get(o)
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#define EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN(o, ptr) \
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EVAS_SMART_EXAMPLE_DATA_GET(o, ptr); \
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if (!ptr) \
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{ \
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fprintf(stderr, "No widget data for object %p (%s)!", \
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o, evas_object_type_get(o)); \
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fflush(stderr); \
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abort(); \
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return; \
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}
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#define EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, ptr, val) \
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EVAS_SMART_EXAMPLE_DATA_GET(o, ptr); \
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if (!ptr) \
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{ \
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fprintf(stderr, "No widget data for object %p (%s)!", \
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o, evas_object_type_get(o)); \
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fflush(stderr); \
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abort(); \
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return val; \
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}
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EVAS_SMART_SUBCLASS_IFACE_NEW
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(_evas_smart_example_type, _evas_smart_example, Evas_Smart_Class,
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Evas_Smart_Class, evas_object_smart_clipped_class_get, _smart_callbacks,
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_smart_interfaces);
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static void
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_on_destroy(Ecore_Evas *ee EINA_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 void
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_on_child_del(void *data,
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Evas *evas EINA_UNUSED,
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Evas_Object *o,
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void *einfo EINA_UNUSED)
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{
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Evas_Object *example_smart = data;
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long idx;
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EVAS_SMART_EXAMPLE_DATA_GET(example_smart, priv);
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idx = (long)(uintptr_t)evas_object_data_get(o, "index");
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idx--;
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priv->children[idx] = NULL;
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evas_object_smart_member_del(o);
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evas_object_smart_changed(example_smart);
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}
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static void
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_evas_smart_example_child_callbacks_unregister(Evas_Object *obj)
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{
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evas_object_data_set(obj, "index", NULL);
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evas_object_event_callback_del(obj, EVAS_CALLBACK_FREE, _on_child_del);
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}
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static void
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_evas_smart_example_child_callbacks_register(Evas_Object *o,
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Evas_Object *child,
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long idx)
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{
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evas_object_event_callback_add(child, EVAS_CALLBACK_FREE, _on_child_del, o);
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evas_object_data_set(child, "index", (void *)(uintptr_t)(++idx));
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}
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/* create and setup a new example smart object's internals */
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static void
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_evas_smart_example_smart_add(Evas_Object *o)
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{
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EVAS_SMART_DATA_ALLOC(o, Evas_Smart_Example_Data);
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/* this is a border around the smart object's area, delimiting it */
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priv->border = evas_object_image_filled_add(evas_object_evas_get(o));
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evas_object_image_file_set(priv->border, border_img_path, NULL);
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evas_object_image_border_set(priv->border, 3, 3, 3, 3);
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evas_object_image_border_center_fill_set(
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priv->border, EVAS_BORDER_FILL_NONE);
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evas_object_smart_member_add(priv->border, o);
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_evas_smart_example_parent_sc->add(o);
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}
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static void
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_evas_smart_example_smart_del(Evas_Object *o)
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{
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EVAS_SMART_EXAMPLE_DATA_GET(o, priv);
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if (priv->children[0])
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{
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_evas_smart_example_child_callbacks_unregister(priv->children[0]);
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priv->children[0] = NULL;
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}
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if (priv->children[1])
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{
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_evas_smart_example_child_callbacks_unregister(priv->children[1]);
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priv->children[1] = NULL;
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}
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_evas_smart_example_parent_sc->del(o);
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}
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static void
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_evas_smart_example_smart_show(Evas_Object *o)
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{
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EVAS_SMART_EXAMPLE_DATA_GET(o, priv);
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if (priv->children[0]) evas_object_show(priv->children[0]);
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if (priv->children[1]) evas_object_show(priv->children[1]);
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evas_object_show(priv->border);
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_evas_smart_example_parent_sc->show(o);
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}
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static void
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_evas_smart_example_smart_hide(Evas_Object *o)
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{
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EVAS_SMART_EXAMPLE_DATA_GET(o, priv);
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if (priv->children[0]) evas_object_hide(priv->children[0]);
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if (priv->children[1]) evas_object_hide(priv->children[1]);
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evas_object_hide(priv->border);
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_evas_smart_example_parent_sc->hide(o);
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}
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static void
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_evas_smart_example_smart_resize(Evas_Object *o,
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Evas_Coord w,
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Evas_Coord h)
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{
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Evas_Coord ow, oh;
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evas_object_geometry_get(o, NULL, NULL, &ow, &oh);
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if ((ow == w) && (oh == h)) return;
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/* this will trigger recalculation */
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evas_object_smart_changed(o);
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}
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/* act on child objects' properties, before rendering */
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static void
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_evas_smart_example_smart_calculate(Evas_Object *o)
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{
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Evas_Coord x, y, w, h;
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EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN(o, priv);
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evas_object_geometry_get(o, &x, &y, &w, &h);
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evas_object_resize(priv->border, w, h);
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evas_object_move(priv->border, x, y);
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if (priv->children[0])
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{
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evas_object_move(priv->children[0], x + 3, y + 3);
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evas_object_resize(priv->children[0], (w / 2) - 3, (h / 2) - 3);
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}
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if (priv->children[1])
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{
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evas_object_move(priv->children[1], x + (w / 2), y + (h / 2));
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evas_object_resize(priv->children[1], (w / 2) - 3, (h / 2) - 3);
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}
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}
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/* setting our smart interface */
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static void
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_evas_smart_example_smart_set_user(Evas_Smart_Class *sc)
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{
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/* specializing these two */
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sc->add = _evas_smart_example_smart_add;
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sc->del = _evas_smart_example_smart_del;
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sc->show = _evas_smart_example_smart_show;
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sc->hide = _evas_smart_example_smart_hide;
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/* clipped smart object has no hook on resizes or calculations */
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sc->resize = _evas_smart_example_smart_resize;
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sc->calculate = _evas_smart_example_smart_calculate;
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}
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/* BEGINS example smart object's own interface */
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/* add a new example smart object to a canvas */
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Evas_Object *
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evas_smart_example_add(Evas *evas)
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{
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return evas_object_smart_add(evas, _evas_smart_example_smart_class_new());
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}
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static void
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_evas_smart_example_remove_do(Evas_Smart_Example_Data *priv,
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Evas_Object *child,
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int idx)
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{
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priv->children[idx] = NULL;
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priv->child_count--;
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_evas_smart_example_child_callbacks_unregister(child);
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evas_object_smart_member_del(child);
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}
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/* remove a child element, return its pointer (or NULL on errors) */
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Evas_Object *
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evas_smart_example_remove(Evas_Object *o,
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Evas_Object *child)
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{
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long idx;
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EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL);
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if (priv->children[0] != child && priv->children[1] != child)
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{
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fprintf(stderr, "You are trying to remove something not belonging to"
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" the example smart object!\n");
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return NULL;
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}
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idx = (long)(uintptr_t)evas_object_data_get(child, "index");
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idx--;
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_evas_smart_example_remove_do(priv, child, idx);
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evas_object_smart_callback_call(
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o, EVT_CHILDREN_NUMBER_CHANGED, (void *)(uintptr_t)priv->child_count);
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evas_object_smart_changed(o);
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return child;
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}
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/* set to return any previous object set to the left position of the
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* smart object or NULL, if any (or on errors) */
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Evas_Object *
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evas_smart_example_set_left(Evas_Object *o,
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Evas_Object *child)
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{
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Evas_Object *ret = NULL;
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EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL);
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if (!child)
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return NULL;
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if (priv->children[1] == child)
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{
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fprintf(stderr, "You mustn't place a child on both slots of"
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" the example smart object!\n");
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return NULL;
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}
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if (priv->children[0])
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{
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if (priv->children[0] != child)
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{
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ret = priv->children[0];
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_evas_smart_example_remove_do(priv, priv->children[0], 0);
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}
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else return child;
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}
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priv->children[0] = child;
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_evas_smart_example_child_callbacks_register(o, child, 0);
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evas_object_smart_member_add(child, o);
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evas_object_smart_changed(o);
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priv->child_count++;
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if (!ret)
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{
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evas_object_smart_callback_call(
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o, EVT_CHILDREN_NUMBER_CHANGED, (void *)(uintptr_t)priv->child_count);
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}
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return ret;
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}
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/* set to return any previous object set to the right position of the
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* smart object or NULL, if any (or on errors) */
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Evas_Object *
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evas_smart_example_set_right(Evas_Object *o,
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Evas_Object *child)
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{
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Evas_Object *ret = NULL;
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EVAS_SMART_EXAMPLE_DATA_GET_OR_RETURN_VAL(o, priv, NULL);
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if (!child)
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return NULL;
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if (priv->children[0] == child)
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{
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fprintf(stderr, "You mustn't place a child on both slots of"
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" the example smart object!\n");
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return NULL;
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}
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if (priv->children[1])
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{
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if (priv->children[1] != child)
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{
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ret = priv->children[1];
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_evas_smart_example_remove_do(priv, priv->children[1], 1);
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}
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else return child;
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}
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priv->children[1] = child;
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_evas_smart_example_child_callbacks_register(o, child, 1);
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evas_object_smart_member_add(child, o);
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evas_object_smart_changed(o);
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priv->child_count++;
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if (!ret)
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{
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evas_object_smart_callback_call(
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o, EVT_CHILDREN_NUMBER_CHANGED, (void *)(uintptr_t)priv->child_count);
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}
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return ret;
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}
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/* END OF example smart object's own interface */
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static void
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_on_keydown(void *data EINA_UNUSED,
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Evas *evas EINA_UNUSED,
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Evas_Object *o EINA_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->key, "q") == 0) /* print help */
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{
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_on_destroy(NULL);
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return;
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}
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if (strcmp(ev->key, "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->key, "w") == 0) /* clear out smart object (WRT
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* members) */
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{
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if (d.rects[0])
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{
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evas_smart_example_remove(d.smt, d.rects[0]);
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evas_object_del(d.rects[0]);
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}
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if (d.rects[1])
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{
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evas_smart_example_remove(d.smt, d.rects[1]);
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evas_object_del(d.rects[1]);
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}
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memset(d.rects, 0, sizeof(d.rects));
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fprintf(stdout, "Deleting all members of the smart object.\n");
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return;
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}
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if (strcmp(ev->key, "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->key, "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->key, "Right") == 0 || strcmp(ev->key, "Left") == 0 ||
|
|
strcmp(ev->key, "Up") == 0 || strcmp(ev->key, "Down") == 0)
|
|
{
|
|
Evas_Coord x, y;
|
|
|
|
evas_object_geometry_get(d.smt, &x, &y, NULL, NULL);
|
|
|
|
switch (ev->key[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->key, "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->key, "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->key, "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 EINA_UNUSED,
|
|
Evas_Object *obj EINA_UNUSED,
|
|
void *event_info)
|
|
{
|
|
fprintf(stdout, "Number of child members on our example smart"
|
|
" object changed to %llu\n", (unsigned long long)(uintptr_t)event_info);
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
const Evas_Smart_Cb_Description **descriptions;
|
|
Evas_Smart_Example_Interface *iface;
|
|
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);
|
|
|
|
iface = (Evas_Smart_Example_Interface *)&iface1;
|
|
iface->base.name = IFACE1_NAME;
|
|
iface->base.private_size = sizeof(iface1_data);
|
|
iface->base.add = _iface1_add;
|
|
iface->base.del = _iface1_del;
|
|
iface->example_func = _iface1_custom_fn;
|
|
|
|
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);
|
|
|
|
iface = (Evas_Smart_Example_Interface *)evas_object_smart_interface_get
|
|
(d.smt, IFACE1_NAME);
|
|
if (iface)
|
|
{
|
|
char *data;
|
|
|
|
fprintf(stdout, "We've found a smart interface on the smart object!"
|
|
"\n\tname: %s\n", iface->base.name);
|
|
|
|
fprintf(stdout, "Setting its interface data...\n");
|
|
data = evas_object_smart_interface_data_get
|
|
(d.smt, (Evas_Smart_Interface *)iface);
|
|
memcpy(data, iface1_data, sizeof(iface1_data));
|
|
|
|
fprintf(stdout, "Calling an interface's function...\n");
|
|
iface->example_func(d.smt);
|
|
}
|
|
|
|
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;
|
|
}
|