1 #include "e.h"
2 
3 #define SMART_NAME     "e_pan"
4 #define API_ENTRY      E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if ((!obj) || (!sd) || (evas_object_type_get(obj) && strcmp(evas_object_type_get(obj), SMART_NAME)))
5 #define INTERNAL_ENTRY E_Smart_Data * sd; sd = evas_object_smart_data_get(obj); if (!sd) return;
6 typedef struct _E_Smart_Data E_Smart_Data;
7 
8 struct _E_Smart_Data
9 {
10    Evas_Object *smart_obj, *child_obj;
11    Evas_Coord   x, y, w, h;
12    Evas_Coord   child_w, child_h, px, py;
13 };
14 
15 /* local subsystem functions */
16 static void _e_smart_child_del_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
17 static void _e_smart_child_resize_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
18 
19 static void _e_smart_reconfigure(E_Smart_Data *sd);
20 static void _e_smart_add(Evas_Object *obj);
21 static void _e_smart_del(Evas_Object *obj);
22 static void _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
23 static void _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
24 static void _e_smart_show(Evas_Object *obj);
25 static void _e_smart_hide(Evas_Object *obj);
26 static void _e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
27 static void _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip);
28 static void _e_smart_clip_unset(Evas_Object *obj);
29 static void _e_smart_init(void);
30 
31 /* local subsystem globals */
32 static Evas_Smart *_e_smart = NULL;
33 
34 /* externally accessible functions */
35 E_API Evas_Object *
e_pan_add(Evas * evas)36 e_pan_add(Evas *evas)
37 {
38    _e_smart_init();
39    return evas_object_smart_add(evas, _e_smart);
40 }
41 
42 E_API void
e_pan_child_set(Evas_Object * obj,Evas_Object * child)43 e_pan_child_set(Evas_Object *obj, Evas_Object *child)
44 {
45    API_ENTRY return;
46    if (child == sd->child_obj) return;
47    if (sd->child_obj)
48      {
49         evas_object_clip_unset(sd->child_obj);
50         evas_object_smart_member_del(sd->child_obj);
51         evas_object_event_callback_del(sd->child_obj, EVAS_CALLBACK_FREE, _e_smart_child_del_hook);
52         evas_object_event_callback_del(sd->child_obj, EVAS_CALLBACK_RESIZE, _e_smart_child_resize_hook);
53         sd->child_obj = NULL;
54      }
55    if (child)
56      {
57         int r, g, b, a;
58 
59         sd->child_obj = child;
60         evas_object_smart_member_add(sd->child_obj, sd->smart_obj);
61         evas_object_geometry_get(sd->child_obj, NULL, NULL,
62                                  &sd->child_w, &sd->child_h);
63         evas_object_event_callback_add(child, EVAS_CALLBACK_FREE,
64                                        _e_smart_child_del_hook, sd);
65         evas_object_event_callback_add(child, EVAS_CALLBACK_RESIZE,
66                                        _e_smart_child_resize_hook, sd);
67         evas_object_color_get(sd->smart_obj, &r, &g, &b, &a);
68         evas_object_color_set(sd->child_obj, r, g, b, a);
69         evas_object_clip_set(sd->child_obj, evas_object_clip_get(sd->smart_obj));
70         if (evas_object_visible_get(sd->smart_obj))
71           evas_object_show(sd->child_obj);
72         else evas_object_hide(sd->child_obj);
73         _e_smart_reconfigure(sd);
74      }
75    evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
76 }
77 
78 E_API Evas_Object *
e_pan_child_get(Evas_Object * obj)79 e_pan_child_get(Evas_Object *obj)
80 {
81    API_ENTRY return NULL;
82    return sd->child_obj;
83 }
84 
85 E_API void
e_pan_set(Evas_Object * obj,Evas_Coord x,Evas_Coord y)86 e_pan_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
87 {
88    API_ENTRY return;
89    if (x > (sd->child_w - sd->w)) x = sd->child_w - sd->w;
90    if (y > (sd->child_h - sd->h)) y = sd->child_h - sd->h;
91    if (x < 0) x = 0;
92    if (y < 0) y = 0;
93    if ((x == sd->px) && (y == sd->py)) return;
94    sd->px = x;
95    sd->py = y;
96    _e_smart_reconfigure(sd);
97    evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
98 }
99 
100 E_API void
e_pan_get(Evas_Object * obj,Evas_Coord * x,Evas_Coord * y)101 e_pan_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
102 {
103    API_ENTRY return;
104    if (x) *x = sd->px;
105    if (y) *y = sd->py;
106 }
107 
108 E_API void
e_pan_max_get(Evas_Object * obj,Evas_Coord * x,Evas_Coord * y)109 e_pan_max_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
110 {
111    API_ENTRY return;
112    if (x)
113      {
114         if (sd->w < sd->child_w) *x = sd->child_w - sd->w;
115         else *x = 0;
116      }
117    if (y)
118      {
119         if (sd->h < sd->child_h) *y = sd->child_h - sd->h;
120         else *y = 0;
121      }
122 }
123 
124 E_API void
e_pan_child_size_get(Evas_Object * obj,Evas_Coord * w,Evas_Coord * h)125 e_pan_child_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
126 {
127    API_ENTRY return;
128    if (w) *w = sd->child_w;
129    if (h) *h = sd->child_h;
130 }
131 
132 /* local subsystem functions */
133 static void
_e_smart_child_del_hook(void * data,Evas * e EINA_UNUSED,Evas_Object * obj EINA_UNUSED,void * event_info EINA_UNUSED)134 _e_smart_child_del_hook(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
135 {
136    E_Smart_Data *sd;
137 
138    sd = data;
139    sd->child_obj = NULL;
140    evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
141 }
142 
143 static void
_e_smart_child_resize_hook(void * data,Evas * e EINA_UNUSED,Evas_Object * obj EINA_UNUSED,void * event_info EINA_UNUSED)144 _e_smart_child_resize_hook(void *data, Evas *e EINA_UNUSED, Evas_Object *obj EINA_UNUSED, void *event_info EINA_UNUSED)
145 {
146    E_Smart_Data *sd;
147    Evas_Coord w = 0, h = 0;
148 
149    sd = data;
150    if (!sd->child_obj) return;
151    evas_object_geometry_get(sd->child_obj, NULL, NULL, &w, &h);
152    if ((w != sd->child_w) || (h != sd->child_h))
153      {
154         sd->child_w = w;
155         sd->child_h = h;
156         _e_smart_reconfigure(sd);
157      }
158    evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
159 }
160 
161 static void
_e_smart_reconfigure(E_Smart_Data * sd)162 _e_smart_reconfigure(E_Smart_Data *sd)
163 {
164    if (sd->child_obj)
165      evas_object_move(sd->child_obj, sd->x - sd->px, sd->y - sd->py);
166 }
167 
168 static void
_e_smart_add(Evas_Object * obj)169 _e_smart_add(Evas_Object *obj)
170 {
171    E_Smart_Data *sd;
172 
173    sd = E_NEW(E_Smart_Data, 1);
174    if (!sd) return;
175    sd->smart_obj = obj;
176    sd->px = 0;
177    sd->py = 0;
178    sd->x = 0;
179    sd->y = 0;
180    sd->w = 0;
181    sd->h = 0;
182    sd->child_w = 0;
183    sd->child_h = 0;
184    evas_object_smart_data_set(obj, sd);
185 }
186 
187 static void
_e_smart_del(Evas_Object * obj)188 _e_smart_del(Evas_Object *obj)
189 {
190    INTERNAL_ENTRY;
191    e_pan_child_set(obj, NULL);
192    E_FREE(sd);
193 }
194 
195 static void
_e_smart_move(Evas_Object * obj,Evas_Coord x,Evas_Coord y)196 _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
197 {
198    INTERNAL_ENTRY;
199    sd->x = x;
200    sd->y = y;
201    _e_smart_reconfigure(sd);
202 }
203 
204 static void
_e_smart_resize(Evas_Object * obj,Evas_Coord w,Evas_Coord h)205 _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
206 {
207    INTERNAL_ENTRY;
208    sd->w = w;
209    sd->h = h;
210    _e_smart_reconfigure(sd);
211    evas_object_smart_callback_call(sd->smart_obj, "changed", NULL);
212 }
213 
214 static void
_e_smart_show(Evas_Object * obj)215 _e_smart_show(Evas_Object *obj)
216 {
217    INTERNAL_ENTRY;
218    if (sd->child_obj)
219      evas_object_show(sd->child_obj);
220 }
221 
222 static void
_e_smart_hide(Evas_Object * obj)223 _e_smart_hide(Evas_Object *obj)
224 {
225    INTERNAL_ENTRY;
226    if (sd->child_obj)
227      evas_object_hide(sd->child_obj);
228 }
229 
230 static void
_e_smart_color_set(Evas_Object * obj,int r,int g,int b,int a)231 _e_smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
232 {
233    INTERNAL_ENTRY;
234    if (sd->child_obj)
235      evas_object_color_set(sd->child_obj, r, g, b, a);
236 }
237 
238 static void
_e_smart_clip_set(Evas_Object * obj,Evas_Object * clip)239 _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip)
240 {
241    INTERNAL_ENTRY;
242    if (sd->child_obj)
243      evas_object_clip_set(sd->child_obj, clip);
244 }
245 
246 static void
_e_smart_clip_unset(Evas_Object * obj)247 _e_smart_clip_unset(Evas_Object *obj)
248 {
249    INTERNAL_ENTRY;
250    if (sd->child_obj)
251      evas_object_clip_unset(sd->child_obj);
252 }
253 
254 /* never need to touch this */
255 
256 static void
_e_smart_init(void)257 _e_smart_init(void)
258 {
259    if (_e_smart) return;
260    {
261       static const Evas_Smart_Class sc =
262       {
263          SMART_NAME,
264          EVAS_SMART_CLASS_VERSION,
265          _e_smart_add,
266          _e_smart_del,
267          _e_smart_move,
268          _e_smart_resize,
269          _e_smart_show,
270          _e_smart_hide,
271          _e_smart_color_set,
272          _e_smart_clip_set,
273          _e_smart_clip_unset,
274          NULL,
275          NULL,
276          NULL,
277          NULL,
278          NULL,
279          NULL,
280          NULL
281       };
282       _e_smart = evas_smart_class_new(&sc);
283    }
284 }
285 
286