evas/examples: Adding an example for multi-touch.
This commit is contained in:
Rafael Antognolli
parent
d4b7389f3a
commit
2ec4078456
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@ -165,6 +165,11 @@ evas_table_SOURCES = evas-table.c
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evas_table_LDADD = $(ECORE_EVAS_COMMON_LDADD)
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evas_table_CPPFLAGS = $(ECORE_EVAS_COMMON_CPPFLAGS)
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EXTRA_PROGRAMS += evas_multi_touch
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evas_multi_touch_SOURCES = evas-multi-touch.c
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evas_multi_touch_LDADD = $(ECORE_EVAS_COMMON_LDADD)
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evas_multi_touch_CPPFLAGS = $(ECORE_EVAS_COMMON_CPPFLAGS)
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.edc.edj:
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$(AM_V_EDJ)$(EDJE_CC) $(EDJE_CC_FLAGS) $< $(builddir)/$(@F)
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@ -193,6 +198,7 @@ evas-smart-interface.c \
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evas-smart-object.c \
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evas-stacking.c \
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evas-table.c \
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evas-multi-touch.c \
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evas-text.c
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DATA_FILES = \
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@ -0,0 +1,263 @@
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <Eina.h>
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#include <Ecore.h>
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#include <Ecore_Evas.h>
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#include <Evas.h>
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#include <stdio.h>
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#include <errno.h>
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#define WIDTH (800)
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#define HEIGHT (600)
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#define RED 0
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#define GREEN 85
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#define BLUE 170
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#define ALPHA_BEGIN 64
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#define ALPHA_END 192
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#define ALPHA_MOVE 255
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#define RECT_SIZE 50
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struct test_data
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{
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Ecore_Evas *ee;
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Evas *canvas;
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Evas_Object *bg;
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Eina_Hash *hash;
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};
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typedef struct touch_point
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{
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Evas_Object *begin;
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Evas_Object *end;
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Evas_Object *move;
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int r, g, b;
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int dev;
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} Touch_Point;
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static struct test_data d = {0};
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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 Evas_Object *
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_rect_add(int x, int y, int r, int g, int b, int alpha)
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{
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int ar, ag, ab;
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Evas_Object *rect = evas_object_rectangle_add(d.canvas);
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evas_object_resize(rect, RECT_SIZE, RECT_SIZE);
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evas_object_move(rect, x - (RECT_SIZE / 2), y - (RECT_SIZE / 2));
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ar = r * alpha / 255;
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ag = g * alpha / 255;
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ab = b * alpha / 255;
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evas_object_color_set(rect, ar, ag, ab, alpha);
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return rect;
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}
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/* Create 3 rectangles, one to mark the beginning of the touch movement,
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* another one for the move itself, and the last one to mark the end of the
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* movement.
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*/
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static Touch_Point *
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_touch_add(int dev, int x, int y)
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{
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Touch_Point *tp = calloc(1, sizeof(*tp));
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tp->r = (((dev * 50) + RED) % 256);
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tp->g = (((dev * 50) + GREEN) % 256);
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tp->b = (((dev * 50) + BLUE) % 256);
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tp->begin = _rect_add(x, y, tp->r, tp->g, tp->b, ALPHA_BEGIN);
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tp->end = _rect_add(x, y, tp->r, tp->g, tp->b, ALPHA_END);
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tp->move = _rect_add(x, y, tp->r, tp->g, tp->b, ALPHA_MOVE);
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evas_object_show(tp->begin);
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evas_object_show(tp->move);
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return tp;
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}
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static void
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_touch_move(Touch_Point *tp, int x, int y)
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{
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evas_object_move(tp->move, x - (RECT_SIZE / 2), y - (RECT_SIZE / 2));
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}
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static void
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_touch_end(Touch_Point *tp, int x, int y)
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{
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evas_object_hide(tp->move);
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evas_object_move(tp->end, x - (RECT_SIZE / 2), y - (RECT_SIZE / 2));
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evas_object_show(tp->end);
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}
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static void
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_touch_del(Touch_Point *tp)
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{
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evas_object_del(tp->begin);
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evas_object_del(tp->end);
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evas_object_del(tp->move);
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free(tp);
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}
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static void
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_mouse_down_handle(int device, int x, int y)
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{
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Touch_Point *tp = NULL, *old_tp;
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tp = _touch_add(device, x, y);
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old_tp = eina_hash_set(d.hash, &device, tp);
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if (old_tp)
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_touch_del(old_tp);
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}
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static void
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_mouse_move_handle(int device, int x, int y)
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{
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Touch_Point *tp;
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tp = eina_hash_find(d.hash, &device);
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if (!tp)
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return;
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_touch_move(tp, x, y);
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}
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static void
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_mouse_up_handle(int device, int x, int y)
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{
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Touch_Point *tp;
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tp = eina_hash_find(d.hash, &device);
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if (!tp)
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{
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printf("ERR: Could not find Touch Point for dev: %d\n", device);
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return;
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}
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_touch_end(tp, x, y);
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}
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static void
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_mouse_down_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Mouse_Down *ev = event_info;
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_mouse_down_handle(0, ev->canvas.x, ev->canvas.y);
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}
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static void
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_multi_down_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Multi_Down *ev = event_info;
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_mouse_down_handle(ev->device, ev->canvas.x, ev->canvas.y);
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}
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static void
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_mouse_move_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Mouse_Move *ev = event_info;
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_mouse_move_handle(0, ev->cur.canvas.x, ev->cur.canvas.y);
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}
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static void
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_multi_move_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Multi_Move *ev = event_info;
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_mouse_move_handle(ev->device, ev->cur.canvas.x, ev->cur.canvas.y);
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}
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static void
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_mouse_up_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Mouse_Move *ev = event_info;
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_mouse_up_handle(0, ev->cur.canvas.x, ev->cur.canvas.y);
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}
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static void
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_multi_up_cb(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info)
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{
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Evas_Event_Multi_Move *ev = event_info;
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_mouse_up_handle(ev->device, ev->cur.canvas.x, ev->cur.canvas.y);
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}
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int
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main(void)
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{
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if (!eina_init())
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return EXIT_FAILURE;
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if (!ecore_evas_init())
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return EXIT_FAILURE;
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/* initialize a hash to store the touch points/rectangles */
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d.hash = eina_hash_int32_new(EINA_FREE_CB(_touch_del));
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/* this will give you a window with an Evas canvas under the first
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* engine available */
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d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
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if (!d.ee)
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goto error;
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ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
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ecore_evas_show(d.ee);
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/* the canvas pointer, de facto */
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d.canvas = ecore_evas_get(d.ee);
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d.bg = evas_object_rectangle_add(d.canvas);
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evas_object_name_set(d.bg, "our dear rectangle");
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evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
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evas_object_move(d.bg, 0, 0); /* at canvas' origin */
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evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
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evas_object_show(d.bg);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MULTI_DOWN, _multi_down_cb, &d);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MOUSE_DOWN, _mouse_down_cb, &d);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MULTI_UP, _multi_up_cb, &d);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MOUSE_UP, _mouse_up_cb, &d);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MULTI_MOVE, _multi_move_cb, &d);
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evas_object_event_callback_add(d.bg, EVAS_CALLBACK_MOUSE_MOVE, _mouse_move_cb, &d);
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evas_object_focus_set(d.bg, EINA_TRUE); /* so we get input events */
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ecore_main_loop_begin();
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evas_object_event_callback_del(d.bg, EVAS_CALLBACK_MULTI_DOWN, _multi_down_cb);
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evas_object_event_callback_del(d.bg, EVAS_CALLBACK_MOUSE_DOWN, _mouse_down_cb);
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ecore_evas_free(d.ee);
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ecore_evas_shutdown();
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eina_shutdown();
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return 0;
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error:
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fprintf(stderr, "you got to have at least one evas engine built and linked"
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" up to ecore-evas for this example to run properly.\n");
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ecore_evas_shutdown();
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return -1;
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}
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