611 lines
16 KiB
C
611 lines
16 KiB
C
/**
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* Simple Evas example illustrating a custom Evas smart object
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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-object evas-smart-object.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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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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"\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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#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;
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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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#define SIG_CHILD_ADDED "child,added"
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#define SIG_CHILD_REMOVED "child,removed"
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static const Evas_Smart_Cb_Description _signals[] =
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{
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{SIG_CHILD_ADDED, ""},
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{SIG_CHILD_REMOVED, ""},
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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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};
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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_NEW(_evas_smart_example_type, _evas_smart_example,
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Evas_Smart_Class, Evas_Smart_Class,
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evas_object_smart_clipped_class_get, _signals);
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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 void
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_on_child_del(void *data,
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Evas *evas __UNUSED__,
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Evas_Object *o,
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void *einfo __UNUSED__)
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{
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Evas_Object *example_smart = data;
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int index;
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EVAS_SMART_EXAMPLE_DATA_GET(example_smart, priv);
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index = (int)evas_object_data_get(o, "index");
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index--;
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priv->children[index] = 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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int index)
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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 *)(++index));
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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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/* 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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int index;
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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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index = (int)evas_object_data_get(child, "index");
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index--;
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priv->children[index] = NULL;
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evas_object_smart_callback_call(o, SIG_CHILD_REMOVED, child);
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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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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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ret = evas_smart_example_remove(o, priv->children[0]);
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else return child;
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}
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priv->children[0] = child;
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evas_object_smart_callback_call(o, SIG_CHILD_ADDED, 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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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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ret = evas_smart_example_remove(o, priv->children[1]);
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else return child;
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}
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priv->children[1] = child;
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evas_object_smart_callback_call(o, SIG_CHILD_ADDED, 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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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 __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, "l") == 0) /* insert random colored
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* rectangle on the left */
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{
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Evas_Object *rect = evas_object_rectangle_add(d.evas), *prev;
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evas_object_color_set(
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rect, rand() % 255, rand() % 255, rand() % 255, 255);
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evas_object_show(rect);
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prev = evas_smart_example_set_left(d.smt, rect);
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fprintf(stdout, "Setting smart object's left spot with a new"
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" rectangle.\n");
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if (prev)
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{
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int r, g, b;
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evas_object_color_get(prev, &r, &g, &b, NULL);
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fprintf(stdout, "Deleting previous left child,"
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" which had colors (%d, %d, %d)\n", r, g, b);
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evas_object_del(prev);
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}
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return;
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}
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if (strcmp(ev->keyname, "r") == 0) /* insert random colored
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* rectangle on the right */
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{
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Evas_Object *rect = evas_object_rectangle_add(d.evas), *prev;
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evas_object_color_set(
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rect, rand() % 255, rand() % 255, rand() % 255, 255);
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evas_object_show(rect);
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prev = evas_smart_example_set_right(d.smt, rect);
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fprintf(stdout, "Setting smart object's right spot with a new"
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" rectangle.\n");
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if (prev)
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{
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int r, g, b;
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evas_object_color_get(prev, &r, &g, &b, NULL);
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fprintf(stdout, "Deleting previous right child,"
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" which had colors (%d, %d, %d)\n", r, g, b);
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evas_object_del(prev);
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}
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return;
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}
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/* move smart object along the canvas */
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if (strcmp(ev->keyname, "Right") == 0 || strcmp(ev->keyname, "Left") == 0 ||
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strcmp(ev->keyname, "Up") == 0 || strcmp(ev->keyname, "Down") == 0)
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{
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Evas_Coord x, y;
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evas_object_geometry_get(d.smt, &x, &y, NULL, NULL);
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switch (ev->keyname[0])
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{
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case 'R':
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x += 20;
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break;
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case 'L':
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x -= 20;
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break;
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case 'U':
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y -= 20;
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break;
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case 'D':
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y += 20;
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break;
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}
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evas_object_move(d.smt, x, y);
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return;
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}
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/* increase smart object's size */
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if (strcmp(ev->keyname, "i") == 0)
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{
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Evas_Coord w, h;
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evas_object_geometry_get(d.smt, NULL, NULL, &w, &h);
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w *= 1.1;
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h *= 1.1;
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evas_object_resize(d.smt, w, h);
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return;
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}
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/* decrease smart object's size */
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if (strcmp(ev->keyname, "d") == 0)
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{
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Evas_Coord w, h;
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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;
|
|
}
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
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);
|
|
|
|
d.clipper = evas_object_smart_clipped_clipper_get(d.smt);
|
|
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_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;
|
|
}
|