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
23 * @note When Elemementary is in embedded mode the scrollbars will not be
24 * dragable, they appear merely as indicators of how much has been scrolled.
25 * @note When Elementary is in desktop mode the thumbscroll(a.k.a.
26 * fingerscroll) won't work.
28 * Default contents parts of the scroller widget that you can use for are:
29 * @li "default" - A content of the scroller
31 * In @ref tutorial_scroller you'll find an example of how to use most of
37 * @brief Type that controls when scrollbars should appear.
39 * @see elm_scroller_policy_set()
41 typedef enum _Elm_Scroller_Policy
43 ELM_SCROLLER_POLICY_AUTO = 0, /**< Show scrollbars as needed */
44 ELM_SCROLLER_POLICY_ON, /**< Always show scrollbars */
45 ELM_SCROLLER_POLICY_OFF, /**< Never show scrollbars */
46 ELM_SCROLLER_POLICY_LAST
47 } Elm_Scroller_Policy;
50 * @brief Add a new scroller to the parent
52 * @param parent The parent object
53 * @return The new object or NULL if it cannot be created
55 EAPI Evas_Object *elm_scroller_add(Evas_Object *parent) EINA_ARG_NONNULL(1);
58 * @brief Set the content of the scroller widget (the object to be scrolled around).
60 * @param obj The scroller object
61 * @param content The new content object
63 * Once the content object is set, a previously set one will be deleted.
64 * If you want to keep that old content object, use the
65 * elm_scroller_content_unset() function.
66 * @deprecated use elm_object_content_set() instead
68 EINA_DEPRECATED EAPI void elm_scroller_content_set(Evas_Object *obj, Evas_Object *child) EINA_ARG_NONNULL(1);
71 * @brief Get the content of the scroller widget
73 * @param obj The slider object
74 * @return The content that is being used
76 * Return the content object which is set for this widget
78 * @see elm_scroller_content_set()
79 * @deprecated use elm_object_content_get() instead.
81 EINA_DEPRECATED EAPI Evas_Object *elm_scroller_content_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);
84 * @brief Unset the content of the scroller widget
86 * @param obj The slider object
87 * @return The content that was being used
89 * Unparent and return the content object which was set for this widget
91 * @see elm_scroller_content_set()
92 * @deprecated use elm_object_content_unset() instead.
94 EINA_DEPRECATED EAPI Evas_Object *elm_scroller_content_unset(Evas_Object *obj) EINA_ARG_NONNULL(1);
97 * @brief Set custom theme elements for the scroller
99 * @param obj The scroller object
100 * @param widget The widget name to use (default is "scroller")
101 * @param base The base name to use (default is "base")
103 EAPI void elm_scroller_custom_widget_base_theme_set(Evas_Object *obj, const char *widget, const char *base) EINA_ARG_NONNULL(1, 2, 3);
106 * @brief Make the scroller minimum size limited to the minimum size of the content
108 * @param obj The scroller object
109 * @param w Enable limiting minimum size horizontally
110 * @param h Enable limiting minimum size vertically
112 * By default the scroller will be as small as its design allows,
113 * irrespective of its content. This will make the scroller minimum size the
114 * right size horizontally and/or vertically to perfectly fit its content in
117 EAPI void elm_scroller_content_min_limit(Evas_Object *obj, Eina_Bool w, Eina_Bool h) EINA_ARG_NONNULL(1);
120 * @brief Show a specific virtual region within the scroller content object
122 * @param obj The scroller object
123 * @param x X coordinate of the region
124 * @param y Y coordinate of the region
125 * @param w Width of the region
126 * @param h Height of the region
128 * This will ensure all (or part if it does not fit) of the designated
129 * region in the virtual content object (0, 0 starting at the top-left of the
130 * virtual content object) is shown within the scroller.
132 EAPI void elm_scroller_region_show(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);
135 * @brief Set the scrollbar visibility policy
137 * @param obj The scroller object
138 * @param policy_h Horizontal scrollbar policy
139 * @param policy_v Vertical scrollbar policy
141 * This sets the scrollbar visibility policy for the given scroller.
142 * ELM_SCROLLER_POLICY_AUTO means the scrollbar is made visible if it is
143 * needed, and otherwise kept hidden. ELM_SCROLLER_POLICY_ON turns it on all
144 * the time, and ELM_SCROLLER_POLICY_OFF always keeps it off. This applies
145 * respectively for the horizontal and vertical scrollbars.
147 EAPI void elm_scroller_policy_set(Evas_Object *obj, Elm_Scroller_Policy policy_h, Elm_Scroller_Policy policy_v) EINA_ARG_NONNULL(1);
150 * @brief Gets scrollbar visibility policy
152 * @param obj The scroller object
153 * @param policy_h Horizontal scrollbar policy
154 * @param policy_v Vertical scrollbar policy
156 * @see elm_scroller_policy_set()
158 EAPI void elm_scroller_policy_get(const Evas_Object *obj, Elm_Scroller_Policy *policy_h, Elm_Scroller_Policy *policy_v) EINA_ARG_NONNULL(1);
161 * @brief Get the currently visible content region
163 * @param obj The scroller object
164 * @param x X coordinate of the region
165 * @param y Y coordinate of the region
166 * @param w Width of the region
167 * @param h Height of the region
169 * This gets the current region in the content object that is visible through
170 * the scroller. The region co-ordinates are returned in the @p x, @p y, @p
171 * w, @p h values pointed to.
173 * @note All coordinates are relative to the content.
175 * @see elm_scroller_region_show()
177 EAPI void elm_scroller_region_get(const Evas_Object *obj, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);
180 * @brief Get the size of the content object
182 * @param obj The scroller object
183 * @param w Width of the content object.
184 * @param h Height of the content object.
186 * This gets the size of the content object of the scroller.
188 EAPI void elm_scroller_child_size_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);
191 * @brief Set bouncing behavior
193 * @param obj The scroller object
194 * @param h_bounce Allow bounce horizontally
195 * @param v_bounce Allow bounce vertically
197 * When scrolling, the scroller may "bounce" when reaching an edge of the
198 * content object. This is a visual way to indicate the end has been reached.
199 * This is enabled by default for both axis. This API will set if it is enabled
200 * for the given axis with the boolean parameters for each axis.
202 EAPI void elm_scroller_bounce_set(Evas_Object *obj, Eina_Bool h_bounce, Eina_Bool v_bounce) EINA_ARG_NONNULL(1);
205 * @brief Get the bounce behaviour
207 * @param obj The Scroller object
208 * @param h_bounce Will the scroller bounce horizontally or not
209 * @param v_bounce Will the scroller bounce vertically or not
211 * @see elm_scroller_bounce_set()
213 EAPI void elm_scroller_bounce_get(const Evas_Object *obj, Eina_Bool *h_bounce, Eina_Bool *v_bounce) EINA_ARG_NONNULL(1);
216 * @brief Set scroll page size relative to viewport size.
218 * @param obj The scroller object
219 * @param h_pagerel The horizontal page relative size
220 * @param v_pagerel The vertical page relative size
222 * The scroller is capable of limiting scrolling by the user to "pages". That
223 * is to jump by and only show a "whole page" at a time as if the continuous
224 * area of the scroller content is split into page sized pieces. This sets
225 * the size of a page relative to the viewport of the scroller. 1.0 is "1
226 * viewport" is size (horizontally or vertically). 0.0 turns it off in that
227 * axis. This is mutually exclusive with page size
228 * (see elm_scroller_page_size_set() for more information). Likewise 0.5
229 * is "half a viewport". Sane usable values are normally between 0.0 and 1.0
230 * including 1.0. If you only want 1 axis to be page "limited", use 0.0 for
233 EAPI void elm_scroller_page_relative_set(Evas_Object *obj, double h_pagerel, double v_pagerel) EINA_ARG_NONNULL(1);
236 * @brief Set scroll page size.
238 * @param obj The scroller object
239 * @param h_pagesize The horizontal page size
240 * @param v_pagesize The vertical page size
242 * This sets the page size to an absolute fixed value, with 0 turning it off
245 * @see elm_scroller_page_relative_set()
247 EAPI void elm_scroller_page_size_set(Evas_Object *obj, Evas_Coord h_pagesize, Evas_Coord v_pagesize) EINA_ARG_NONNULL(1);
250 * @brief Get scroll current page number.
252 * @param obj The scroller object
253 * @param h_pagenumber The horizontal page number
254 * @param v_pagenumber The vertical page number
256 * The page number starts from 0. 0 is the first page.
257 * Current page means the page which meets the top-left of the viewport.
258 * If there are two or more pages in the viewport, it returns the number of the page
259 * which meets the top-left of the viewport.
261 * @see elm_scroller_last_page_get()
262 * @see elm_scroller_page_show()
263 * @see elm_scroller_page_brint_in()
265 EAPI void elm_scroller_current_page_get(const Evas_Object *obj, int *h_pagenumber, int *v_pagenumber) EINA_ARG_NONNULL(1);
268 * @brief Get scroll last page number.
270 * @param obj The scroller object
271 * @param h_pagenumber The horizontal page number
272 * @param v_pagenumber The vertical page number
274 * The page number starts from 0. 0 is the first page.
275 * This returns the last page number among the pages.
277 * @see elm_scroller_current_page_get()
278 * @see elm_scroller_page_show()
279 * @see elm_scroller_page_brint_in()
281 EAPI void elm_scroller_last_page_get(const Evas_Object *obj, int *h_pagenumber, int *v_pagenumber) EINA_ARG_NONNULL(1);
284 * Show a specific virtual region within the scroller content object by page number.
286 * @param obj The scroller object
287 * @param h_pagenumber The horizontal page number
288 * @param v_pagenumber The vertical page number
290 * 0, 0 of the indicated page is located at the top-left of the viewport.
291 * This will jump to the page directly without animation.
296 * sc = elm_scroller_add(win);
297 * elm_scroller_content_set(sc, content);
298 * elm_scroller_page_relative_set(sc, 1, 0);
299 * elm_scroller_current_page_get(sc, &h_page, &v_page);
300 * elm_scroller_page_show(sc, h_page + 1, v_page);
303 * @see elm_scroller_page_bring_in()
305 EAPI void elm_scroller_page_show(Evas_Object *obj, int h_pagenumber, int v_pagenumber) EINA_ARG_NONNULL(1);
308 * Show a specific virtual region within the scroller content object by page number.
310 * @param obj The scroller object
311 * @param h_pagenumber The horizontal page number
312 * @param v_pagenumber The vertical page number
314 * 0, 0 of the indicated page is located at the top-left of the viewport.
315 * This will slide to the page with animation.
320 * sc = elm_scroller_add(win);
321 * elm_scroller_content_set(sc, content);
322 * elm_scroller_page_relative_set(sc, 1, 0);
323 * elm_scroller_last_page_get(sc, &h_page, &v_page);
324 * elm_scroller_page_bring_in(sc, h_page, v_page);
327 * @see elm_scroller_page_show()
329 EAPI void elm_scroller_page_bring_in(Evas_Object *obj, int h_pagenumber, int v_pagenumber) EINA_ARG_NONNULL(1);
332 * @brief Show a specific virtual region within the scroller content object.
334 * @param obj The scroller object
335 * @param x X coordinate of the region
336 * @param y Y coordinate of the region
337 * @param w Width of the region
338 * @param h Height of the region
340 * This will ensure all (or part if it does not fit) of the designated
341 * region in the virtual content object (0, 0 starting at the top-left of the
342 * virtual content object) is shown within the scroller. Unlike
343 * elm_scroller_region_show(), this allow the scroller to "smoothly slide"
344 * to this location (if configuration in general calls for transitions). It
345 * may not jump immediately to the new location and make take a while and
346 * show other content along the way.
348 * @see elm_scroller_region_show()
350 EAPI void elm_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);
353 * @brief Set event propagation on a scroller
355 * @param obj The scroller object
356 * @param propagation If propagation is enabled or not
358 * This enables or disabled event propagation from the scroller content to
359 * the scroller and its parent. By default event propagation is disabled.
361 EAPI void elm_scroller_propagate_events_set(Evas_Object *obj, Eina_Bool propagation) EINA_ARG_NONNULL(1);
364 * @brief Get event propagation for a scroller
366 * @param obj The scroller object
367 * @return The propagation state
369 * This gets the event propagation for a scroller.
371 * @see elm_scroller_propagate_events_set()
373 EAPI Eina_Bool elm_scroller_propagate_events_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);
376 * @brief Set scrolling gravity on a scroller
378 * @param obj The scroller object
379 * @param x The scrolling horizontal gravity
380 * @param y The scrolling vertical gravity
382 * The gravity, defines how the scroller will adjust its view
383 * when the size of the scroller contents increase.
385 * The scroller will adjust the view to glue itself as follows.
387 * x=0.0, for showing the left most region of the content.
388 * x=1.0, for showing the right most region of the content.
389 * y=0.0, for showing the bottom most region of the content.
390 * y=1.0, for showing the top most region of the content.
392 * Default values for x and y are 0.0
394 EAPI void elm_scroller_gravity_set(Evas_Object *obj, double x, double y) EINA_ARG_NONNULL(1);
397 * @brief Get scrolling gravity values for a scroller
399 * @param obj The scroller object
400 * @param x The scrolling horizontal gravity
401 * @param y The scrolling vertical gravity
403 * This gets gravity values for a scroller.
405 * @see elm_scroller_gravity_set()
408 EAPI void elm_scroller_gravity_get(const Evas_Object *obj, double *x, double *y) EINA_ARG_NONNULL(1);