1 #include <Elementary.h>
5 * @defgroup Pager Pager
7 * The pager is an object that allows flipping (with animation) between 1 or
8 * more “pages” of objects, much like a stack of windows within the window.
10 * Objects can be pushed or popped from he stack or deleted as normal.
11 * Pushes and pops will animate (and a pop will delete the object once the
12 * animation is finished). Any object in the pager can be promoted to the top
13 * (from its current stacking position) as well. Objects are pushed to the
14 * top with elm_pager_content_push() and when the top item is no longer
15 * wanted, simply pop it with elm_pager_content_pop() and it will also be
16 * deleted. Any object you wish to promote to the top that is already in the
17 * pager, simply use elm_pager_content_promote(). If an object is no longer
18 * needed and is not the top item, just delete it as normal. You can query
19 * which objects are the top and bottom with elm_pager_content_bottom_get()
20 * and elm_pager_content_top_get().
23 typedef struct _Widget_Data Widget_Data;
24 typedef struct _Item Item;
30 Evas_Object *rect, *clip;
35 Evas_Object *obj, *base, *content;
36 Evas_Coord minw, minh;
40 static const char *widtype = NULL;
41 static void _del_hook(Evas_Object *obj);
42 static void _theme_hook(Evas_Object *obj);
43 static void _sizing_eval(Evas_Object *obj);
44 static void _changed_size_hints(void *data, Evas *e, Evas_Object *obj, void *event_info);
45 static void _sub_del(void *data, Evas_Object *obj, void *event_info);
48 _del_hook(Evas_Object *obj)
50 Widget_Data *wd = elm_widget_data_get(obj);
56 _theme_hook(Evas_Object *obj)
58 Widget_Data *wd = elm_widget_data_get(obj);
62 EINA_LIST_FOREACH(wd->stack, l, it)
63 edje_object_scale_set(it->base, elm_widget_scale_get(obj) *
69 _sizing_eval(Evas_Object *obj)
71 Widget_Data *wd = elm_widget_data_get(obj);
72 Evas_Coord minw = -1, minh = -1;
76 EINA_LIST_FOREACH(wd->stack, l, it)
78 if (it->minw > minw) minw = it->minw;
79 if (it->minh > minh) minh = it->minh;
81 evas_object_size_hint_min_set(obj, minw, minh);
82 evas_object_size_hint_max_set(obj, -1, -1);
86 _changed_size_hints(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
89 Evas_Coord minw = -1, minh = -1;
90 evas_object_size_hint_min_get(it->content, &minw, &minh);
91 // FIXME: why is this needed? how does edje get this unswallowed or
92 // lose its callbacks to edje
93 edje_object_part_swallow(it->base, "elm.swallow.content", it->content);
94 edje_object_size_min_calc(it->base, &it->minw, &it->minh);
95 _sizing_eval(it->obj);
99 _eval_top(Evas_Object *obj)
101 Widget_Data *wd = elm_widget_data_get(obj);
104 if (!wd->stack) return;
105 ittop = eina_list_last(wd->stack)->data;
106 if (ittop != wd->top)
109 const char *onshow, *onhide;
114 edje_object_signal_emit(o, "elm,action,hide", "elm");
115 onhide = edje_object_data_get(o, "onhide");
118 if (!strcmp(onhide, "raise")) evas_object_raise(o);
119 else if (!strcmp(onhide, "lower")) evas_object_lower(o);
125 edje_object_signal_emit(o, "elm,action,show", "elm");
126 onshow = edje_object_data_get(o, "onshow");
129 if (!strcmp(onshow, "raise")) evas_object_raise(o);
130 else if (!strcmp(onshow, "lower")) evas_object_lower(o);
136 _move(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
138 Widget_Data *wd = elm_widget_data_get(data);
143 evas_object_geometry_get(obj, &x, &y, NULL, NULL);
144 EINA_LIST_FOREACH(wd->stack, l, it)
145 evas_object_move(it->base, x, y);
149 _sub_del(void *data, Evas_Object *obj __UNUSED__, void *event_info)
151 Widget_Data *wd = elm_widget_data_get(data);
152 Evas_Object *sub = event_info;
156 EINA_LIST_FOREACH(wd->stack, l, it)
158 if (it->content == sub)
160 wd->stack = eina_list_remove_list(wd->stack, l);
161 evas_object_event_callback_del_full
162 (sub, EVAS_CALLBACK_CHANGED_SIZE_HINTS, _changed_size_hints, it);
163 evas_object_del(it->base);
172 _resize(void *data, Evas *e __UNUSED__, Evas_Object *obj, void *event_info __UNUSED__)
174 Widget_Data *wd = elm_widget_data_get(data);
179 evas_object_geometry_get(obj, NULL, NULL, &w, &h);
180 EINA_LIST_FOREACH(wd->stack, l, it) evas_object_resize(it->base, w, h);
184 _signal_hide_finished(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
187 Evas_Object *obj2 = it->obj;
188 evas_object_hide(it->base);
189 edje_object_signal_emit(it->base, "elm,action,reset", "elm");
190 evas_object_smart_callback_call(obj2, "hide,finished", it->content);
191 edje_object_message_signal_process(it->base);
192 if (it->popme) evas_object_del(it->content);
197 * Add a new pager to the parent
199 * @param parent The parent object
200 * @return The new object or NULL if it cannot be created
205 elm_pager_add(Evas_Object *parent)
211 wd = ELM_NEW(Widget_Data);
212 e = evas_object_evas_get(parent);
213 obj = elm_widget_add(e);
214 ELM_SET_WIDTYPE(widtype, "pager");
215 elm_widget_type_set(obj, "pager");
216 elm_widget_sub_object_add(parent, obj);
217 elm_widget_data_set(obj, wd);
218 elm_widget_del_hook_set(obj, _del_hook);
219 elm_widget_theme_hook_set(obj, _theme_hook);
221 wd->clip = evas_object_rectangle_add(e);
222 elm_widget_resize_object_set(obj, wd->clip);
223 elm_widget_sub_object_add(obj, wd->clip);
225 wd->rect = evas_object_rectangle_add(e);
226 elm_widget_sub_object_add(obj, wd->rect);
227 evas_object_color_set(wd->rect, 255, 255, 255, 0);
228 evas_object_clip_set(wd->rect, wd->clip);
230 evas_object_event_callback_add(obj, EVAS_CALLBACK_MOVE, _move, obj);
231 evas_object_event_callback_add(obj, EVAS_CALLBACK_RESIZE, _resize, obj);
233 evas_object_smart_callback_add(obj, "sub-object-del", _sub_del, obj);
240 * Push an object to the top of the pager stack (and show it)
242 * The object pushed becomes a child of the pager and will be controlled
243 * it and deleted when the pager is deleted.
245 * @param obj The pager object
246 * @param content The object to push
251 elm_pager_content_push(Evas_Object *obj, Evas_Object *content)
253 ELM_CHECK_WIDTYPE(obj, widtype);
254 Widget_Data *wd = elm_widget_data_get(obj);
255 Item *it = ELM_NEW(Item);
256 Evas_Coord x, y, w, h;
260 it->content = content;
261 it->base = edje_object_add(evas_object_evas_get(obj));
262 evas_object_smart_member_add(it->base, obj);
263 evas_object_geometry_get(obj, &x, &y, &w, &h);
264 evas_object_move(it->base, x, y);
265 evas_object_resize(it->base, w, h);
266 evas_object_clip_set(it->base, wd->clip);
267 elm_widget_sub_object_add(obj, it->base);
268 elm_widget_sub_object_add(obj, it->content);
269 _elm_theme_object_set(obj, it->base, "pager", "base", elm_widget_style_get(obj));
270 edje_object_signal_callback_add(it->base, "elm,action,hide,finished", "",
271 _signal_hide_finished, it);
272 evas_object_event_callback_add(it->content,
273 EVAS_CALLBACK_CHANGED_SIZE_HINTS,
274 _changed_size_hints, it);
275 edje_object_part_swallow(it->base, "elm.swallow.content", it->content);
276 edje_object_size_min_calc(it->base, &it->minw, &it->minh);
277 evas_object_show(it->content);
278 wd->stack = eina_list_append(wd->stack, it);
284 * Pop the object that is on top of the stack
286 * This pops the object that is on top (visible) in the pager, makes it
287 * disappear, then deletes the object. The object that was underneath it
288 * on the stack will become visible.
290 * @param obj The pager object
295 elm_pager_content_pop(Evas_Object *obj)
297 ELM_CHECK_WIDTYPE(obj, widtype);
298 Widget_Data *wd = elm_widget_data_get(obj);
302 if (!wd->stack) return;
303 it = eina_list_last(wd->stack)->data;
304 it->popme = EINA_TRUE;
305 ll = eina_list_last(wd->stack);
316 edje_object_signal_emit(o, "elm,action,hide", "elm");
317 onhide = edje_object_data_get(o, "onhide");
320 if (!strcmp(onhide, "raise")) evas_object_raise(o);
321 else if (!strcmp(onhide, "lower")) evas_object_lower(o);
328 elm_pager_content_promote(obj, it->content);
334 * Promote an object already in the pager stack to the top of the stack
336 * This will take the indicated object and promote it to the top of the stack
337 * as if it had been pushed there. The object must already be inside the
338 * pager stack to work.
340 * @param obj The pager object
341 * @param content The object to promote
346 elm_pager_content_promote(Evas_Object *obj, Evas_Object *content)
348 ELM_CHECK_WIDTYPE(obj, widtype);
349 Widget_Data *wd = elm_widget_data_get(obj);
353 EINA_LIST_FOREACH(wd->stack, l, it)
355 if (it->content == content)
357 wd->stack = eina_list_remove_list(wd->stack, l);
358 wd->stack = eina_list_append(wd->stack, it);
366 * Return the object at the bottom of the pager stack
368 * @param obj The pager object
369 * @return The bottom object or NULL if none
374 elm_pager_content_bottom_get(const Evas_Object *obj)
376 ELM_CHECK_WIDTYPE(obj, widtype) NULL;
377 Widget_Data *wd = elm_widget_data_get(obj);
379 if (!wd) return NULL;
380 if (!wd->stack) return NULL;
381 it = wd->stack->data;
386 * Return the object at the top of the pager stack
388 * @param obj The pager object
389 * @return The top object or NULL if none
394 elm_pager_content_top_get(const Evas_Object *obj)
396 ELM_CHECK_WIDTYPE(obj, widtype) NULL;
397 Widget_Data *wd = elm_widget_data_get(obj);
399 if (!wd) return NULL;
400 if (!wd->stack) return NULL;
401 it = eina_list_last(wd->stack)->data;