2 * @defgroup Scroller Scroller
4 * A scroller holds a single object and "scrolls it around". This means that
5 * it allows the user to use a scrollbar (or a finger) to drag the viewable
6 * region around, allowing to move through a much larger object that is
7 * contained in the scroller. The scroller will always have a small minimum
8 * size by default as it won't be limited by the contents of the scroller.
10 * Signals that you can add callbacks for are:
11 * @li "edge,left" - the left edge of the content has been reached
12 * @li "edge,right" - the right edge of the content has been reached
13 * @li "edge,top" - the top edge of the content has been reached
14 * @li "edge,bottom" - the bottom edge of the content has been reached
15 * @li "scroll" - the content has been scrolled (moved)
16 * @li "scroll,anim,start" - scrolling animation has started
17 * @li "scroll,anim,stop" - scrolling animation has stopped
18 * @li "scroll,drag,start" - dragging the contents around has started
19 * @li "scroll,drag,stop" - dragging the contents around has stopped
20 * @note The "scroll,anim,*" and "scroll,drag,*" signals are only emitted by
24 * @note When Elemementary is in embedded mode the scrollbars will not be
25 * dragable, they appear merely as indicators of how much has been scrolled.
26 * @note When Elementary is in desktop mode the thumbscroll(a.k.a.
27 * fingerscroll) won't work.
29 * Default contents parts of the scroller widget that you can use for are:
33 * @note When Elementary is in embedded mode the scrollbars will not be
34 * draggable, they appear merely as indicators of how much has been scrolled.
35 * @note When Elementary is in desktop mode the thumbscroll(a.k.a.
36 * fingerscroll) won't work.
38 * Default content parts of the scroller widget that you can use for are:
39 >>>>>>> remotes/origin/upstream
40 * @li "default" - A content of the scroller
42 * Supported elm_object common APIs.
43 * @li elm_object_signal_emit
44 * @li elm_object_signal_callback_add
45 * @li elm_object_signal_callback_del
46 * @li elm_object_part_content_set
47 * @li elm_object_part_content_get
48 * @li elm_object_part_content_unset
50 * In @ref tutorial_scroller you'll find an example of how to use most of
56 * @brief Type that controls when scrollbars should appear.
58 * @see elm_scroller_policy_set()
62 ELM_SCROLLER_POLICY_AUTO = 0, /**< Show scrollbars as needed */
63 ELM_SCROLLER_POLICY_ON, /**< Always show scrollbars */
64 ELM_SCROLLER_POLICY_OFF, /**< Never show scrollbars */
65 ELM_SCROLLER_POLICY_LAST
66 } Elm_Scroller_Policy;
69 * @brief Add a new scroller to the parent
71 * @param parent The parent object
72 * @return The new object or NULL if it cannot be created
74 EAPI Evas_Object *elm_scroller_add(Evas_Object *parent);
77 * @brief Set custom theme elements for the scroller
79 * @param obj The scroller object
80 * @param widget The widget name to use (default is "scroller")
81 * @param base The base name to use (default is "base")
83 EAPI void elm_scroller_custom_widget_base_theme_set(Evas_Object *obj, const char *widget, const char *base);
86 * @brief Make the scroller minimum size limited to the minimum size of the content
88 * @param obj The scroller object
89 * @param w Enable limiting minimum size horizontally
90 * @param h Enable limiting minimum size vertically
92 * By default the scroller will be as small as its design allows,
93 * irrespective of its content. This will make the scroller minimum size the
94 * right size horizontally and/or vertically to perfectly fit its content in
97 EAPI void elm_scroller_content_min_limit(Evas_Object *obj, Eina_Bool w, Eina_Bool h);
100 * @brief Show a specific virtual region within the scroller content object
102 * @param obj The scroller object
103 * @param x X coordinate of the region
104 * @param y Y coordinate of the region
105 * @param w Width of the region
106 * @param h Height of the region
108 * This will ensure all (or part if it does not fit) of the designated
109 * region in the virtual content object (0, 0 starting at the top-left of the
110 * virtual content object) is shown within the scroller.
112 EAPI void elm_scroller_region_show(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h);
115 * @brief Set the scrollbar visibility policy
117 * @param obj The scroller object
118 * @param policy_h Horizontal scrollbar policy
119 * @param policy_v Vertical scrollbar policy
121 * This sets the scrollbar visibility policy for the given scroller.
122 * ELM_SCROLLER_POLICY_AUTO means the scrollbar is made visible if it is
123 * needed, and otherwise kept hidden. ELM_SCROLLER_POLICY_ON turns it on all
124 * the time, and ELM_SCROLLER_POLICY_OFF always keeps it off. This applies
125 * respectively for the horizontal and vertical scrollbars.
127 EAPI void elm_scroller_policy_set(Evas_Object *obj, Elm_Scroller_Policy policy_h, Elm_Scroller_Policy policy_v);
130 * @brief Gets scrollbar visibility policy
132 * @param obj The scroller object
133 * @param policy_h Horizontal scrollbar policy
134 * @param policy_v Vertical scrollbar policy
136 * @see elm_scroller_policy_set()
138 EAPI void elm_scroller_policy_get(const Evas_Object *obj, Elm_Scroller_Policy *policy_h, Elm_Scroller_Policy *policy_v);
141 * @brief Get the currently visible content region
143 * @param obj The scroller object
144 * @param x X coordinate of the region
145 * @param y Y coordinate of the region
146 * @param w Width of the region
147 * @param h Height of the region
149 * This gets the current region in the content object that is visible through
150 * the scroller. The region co-ordinates are returned in the @p x, @p y, @p
151 * w, @p h values pointed to.
153 * @note All coordinates are relative to the content.
155 * @see elm_scroller_region_show()
157 EAPI void elm_scroller_region_get(const Evas_Object *obj, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h);
160 * @brief Get the size of the content object
162 * @param obj The scroller object
163 * @param w Width of the content object.
164 * @param h Height of the content object.
166 * This gets the size of the content object of the scroller.
168 EAPI void elm_scroller_child_size_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h);
171 * @brief Set bouncing behavior
173 * @param obj The scroller object
174 * @param h_bounce Allow bounce horizontally
175 * @param v_bounce Allow bounce vertically
177 * When scrolling, the scroller may "bounce" when reaching an edge of the
178 * content object. This is a visual way to indicate the end has been reached.
179 * This is enabled by default for both axis. This API will set if it is enabled
180 * for the given axis with the boolean parameters for each axis.
182 EAPI void elm_scroller_bounce_set(Evas_Object *obj, Eina_Bool h_bounce, Eina_Bool v_bounce);
185 * @brief Get the bounce behaviour
187 * @param obj The Scroller object
188 * @param h_bounce Will the scroller bounce horizontally or not
189 * @param v_bounce Will the scroller bounce vertically or not
191 * @see elm_scroller_bounce_set()
193 EAPI void elm_scroller_bounce_get(const Evas_Object *obj, Eina_Bool *h_bounce, Eina_Bool *v_bounce);
196 * @brief Set scroll page size relative to viewport size.
198 * @param obj The scroller object
199 * @param h_pagerel The horizontal page relative size
200 * @param v_pagerel The vertical page relative size
202 * The scroller is capable of limiting scrolling by the user to "pages". That
203 * is to jump by and only show a "whole page" at a time as if the continuous
204 * area of the scroller content is split into page sized pieces. This sets
205 * the size of a page relative to the viewport of the scroller. 1.0 is "1
206 * viewport" is size (horizontally or vertically). 0.0 turns it off in that
207 * axis. This is mutually exclusive with page size
208 * (see elm_scroller_page_size_set() for more information). Likewise 0.5
209 * is "half a viewport". Sane usable values are normally between 0.0 and 1.0
210 * including 1.0. If you only want 1 axis to be page "limited", use 0.0 for
213 EAPI void elm_scroller_page_relative_set(Evas_Object *obj, double h_pagerel, double v_pagerel);
216 * @brief Set scroll page size.
218 * @param obj The scroller object
219 * @param h_pagesize The horizontal page size
220 * @param v_pagesize The vertical page size
222 * This sets the page size to an absolute fixed value, with 0 turning it off
225 * @see elm_scroller_page_relative_set()
227 EAPI void elm_scroller_page_size_set(Evas_Object *obj, Evas_Coord h_pagesize, Evas_Coord v_pagesize);
230 * @brief Get scroll current page number.
232 * @param obj The scroller object
233 * @param h_pagenumber The horizontal page number
234 * @param v_pagenumber The vertical page number
236 * The page number starts from 0. 0 is the first page.
237 * Current page means the page which meets the top-left of the viewport.
238 * If there are two or more pages in the viewport, it returns the number of the page
239 * which meets the top-left of the viewport.
241 * @see elm_scroller_last_page_get()
242 * @see elm_scroller_page_show()
244 * @see elm_scroller_page_brint_in()
246 * @see elm_scroller_page_bring_in()
247 >>>>>>> remotes/origin/upstream
249 EAPI void elm_scroller_current_page_get(const Evas_Object *obj, int *h_pagenumber, int *v_pagenumber);
252 * @brief Get scroll last page number.
254 * @param obj The scroller object
255 * @param h_pagenumber The horizontal page number
256 * @param v_pagenumber The vertical page number
258 * The page number starts from 0. 0 is the first page.
259 * This returns the last page number among the pages.
261 * @see elm_scroller_current_page_get()
262 * @see elm_scroller_page_show()
264 * @see elm_scroller_page_brint_in()
266 * @see elm_scroller_page_bring_in()
267 >>>>>>> remotes/origin/upstream
269 EAPI void elm_scroller_last_page_get(const Evas_Object *obj, int *h_pagenumber, int *v_pagenumber);
272 * Show a specific virtual region within the scroller content object by page number.
274 * @param obj The scroller object
275 * @param h_pagenumber The horizontal page number
276 * @param v_pagenumber The vertical page number
278 * 0, 0 of the indicated page is located at the top-left of the viewport.
279 * This will jump to the page directly without animation.
284 * sc = elm_scroller_add(win);
285 * elm_scroller_content_set(sc, content);
286 * elm_scroller_page_relative_set(sc, 1, 0);
287 * elm_scroller_current_page_get(sc, &h_page, &v_page);
288 * elm_scroller_page_show(sc, h_page + 1, v_page);
291 * @see elm_scroller_page_bring_in()
293 EAPI void elm_scroller_page_show(Evas_Object *obj, int h_pagenumber, int v_pagenumber);
296 * Show a specific virtual region within the scroller content object by page number.
298 * @param obj The scroller object
299 * @param h_pagenumber The horizontal page number
300 * @param v_pagenumber The vertical page number
302 * 0, 0 of the indicated page is located at the top-left of the viewport.
303 * This will slide to the page with animation.
308 * sc = elm_scroller_add(win);
309 * elm_scroller_content_set(sc, content);
310 * elm_scroller_page_relative_set(sc, 1, 0);
311 * elm_scroller_last_page_get(sc, &h_page, &v_page);
312 * elm_scroller_page_bring_in(sc, h_page, v_page);
315 * @see elm_scroller_page_show()
317 EAPI void elm_scroller_page_bring_in(Evas_Object *obj, int h_pagenumber, int v_pagenumber);
320 * @brief Show a specific virtual region within the scroller content object.
322 * @param obj The scroller object
323 * @param x X coordinate of the region
324 * @param y Y coordinate of the region
325 * @param w Width of the region
326 * @param h Height of the region
328 * This will ensure all (or part if it does not fit) of the designated
329 * region in the virtual content object (0, 0 starting at the top-left of the
330 * virtual content object) is shown within the scroller. Unlike
331 * elm_scroller_region_show(), this allow the scroller to "smoothly slide"
332 * to this location (if configuration in general calls for transitions). It
333 * may not jump immediately to the new location and make take a while and
334 * show other content along the way.
336 * @see elm_scroller_region_show()
338 EAPI void elm_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h);
341 * @brief Set event propagation on a scroller
343 * @param obj The scroller object
344 * @param propagation If propagation is enabled or not
346 * This enables or disabled event propagation from the scroller content to
347 * the scroller and its parent. By default event propagation is disabled.
349 EAPI void elm_scroller_propagate_events_set(Evas_Object *obj, Eina_Bool propagation);
352 * @brief Get event propagation for a scroller
354 * @param obj The scroller object
355 * @return The propagation state
357 * This gets the event propagation for a scroller.
359 * @see elm_scroller_propagate_events_set()
361 EAPI Eina_Bool elm_scroller_propagate_events_get(const Evas_Object *obj);
364 * @brief Set scrolling gravity on a scroller
366 * @param obj The scroller object
367 * @param x The scrolling horizontal gravity
368 * @param y The scrolling vertical gravity
370 * The gravity, defines how the scroller will adjust its view
371 * when the size of the scroller contents increase.
373 * The scroller will adjust the view to glue itself as follows.
375 * x=0.0, for showing the left most region of the content.
376 * x=1.0, for showing the right most region of the content.
377 * y=0.0, for showing the bottom most region of the content.
378 * y=1.0, for showing the top most region of the content.
380 * Default values for x and y are 0.0
382 EAPI void elm_scroller_gravity_set(Evas_Object *obj, double x, double y);
385 * @brief Get scrolling gravity values for a scroller
387 * @param obj The scroller object
388 * @param x The scrolling horizontal gravity
389 * @param y The scrolling vertical gravity
391 * This gets gravity values for a scroller.
393 * @see elm_scroller_gravity_set()
396 EAPI void elm_scroller_gravity_get(const Evas_Object *obj, double *x, double *y);