638 lines
23 KiB
C
638 lines
23 KiB
C
/**
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* @defgroup Layout Layout
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*
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* @image html img/widget/layout/preview-00.png
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* @image latex img/widget/layout/preview-00.eps width=\textwidth
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*
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* @image html img/layout-predefined.png
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* @image latex img/layout-predefined.eps width=\textwidth
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*
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* This is a container widget that takes a standard Edje design file and
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* wraps it very thinly in a widget.
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*
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* An Edje design (theme) file has a very wide range of possibilities to
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* describe the behavior of elements added to the Layout. Check out the Edje
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* documentation and the EDC reference to get more information about what can
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* be done with Edje.
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*
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* Just like @ref List, @ref Box, and other container widgets, any
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* object added to the Layout will become its child, meaning that it will be
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* deleted if the Layout is deleted, move if the Layout is moved, and so on.
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*
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* The Layout widget can contain as many Contents, Boxes or Tables as
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* described in its theme file. For instance, objects can be added to
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* different Tables by specifying the respective Table part names. The same
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* is valid for Content and Box.
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*
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* The objects added as child of the Layout will behave as described in the
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* part description where they were added. There are 3 possible types of
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* parts where a child can be added:
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*
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* @section secContent Content (SWALLOW part)
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*
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* Only one object can be added to the @c SWALLOW part (but you still can
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* have many @c SWALLOW parts and one object on each of them). Use the @c
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* elm_object_content_set/get/unset functions to set, retrieve and unset
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* objects as content of the @c SWALLOW. After being set to this part, the
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* object size, position, visibility, clipping and other description
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* properties will be totally controlled by the description of the given part
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* (inside the Edje theme file).
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*
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* One can use @c evas_object_size_hint_* functions on the child to have some
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* kind of control over its behavior, but the resulting behavior will still
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* depend heavily on the @c SWALLOW part description.
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*
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* The Edje theme also can change the part description, based on signals or
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* scripts running inside the theme. This change can also be animated. All of
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* this will affect the child object set as content accordingly. The object
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* size will be changed if the part size is changed, it will animate move if
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* the part is moving, and so on.
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*
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* The following picture demonstrates a Layout widget with a child object
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* added to its @c SWALLOW:
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*
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* @image html layout_swallow.png
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* @image latex layout_swallow.eps width=\textwidth
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*
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* @section secBox Box (BOX part)
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*
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* An Edje @c BOX part is very similar to the Elementary @ref Box widget. It
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* allows one to add objects to the box and have them distributed along its
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* area, accordingly to the specified @a layout property (now by @a layout we
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* mean the chosen layouting design of the Box, not the Layout widget
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* itself).
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*
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* A similar effect for having a box with its position, size and other things
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* controlled by the Layout theme would be to create an Elementary @ref Box
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* widget and add it as a Content in the @c SWALLOW part.
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*
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* The main difference of using the Layout Box is that its behavior, the box
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* properties like layouting format, padding, align, etc. will be all
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* controlled by the theme. This means, for example, that a signal could be
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* sent to the Layout theme (with elm_object_signal_emit()) and the theme
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* handled the signal by changing the box padding, or align, or both. Using
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* the Elementary @ref Box widget is not necessarily harder or easier, it
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* just depends on the circumstances and requirements.
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*
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* The Layout Box can be used through the @c elm_layout_box_* set of
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* functions.
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*
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* The following picture demonstrates a Layout widget with many child objects
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* added to its @c BOX part:
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*
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* @image html layout_box.png
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* @image latex layout_box.eps width=\textwidth
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*
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* @section secTable Table (TABLE part)
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*
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* Just like the @ref secBox, the Layout Table is very similar to the
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* Elementary @ref Table widget. It allows one to add objects to the Table
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* specifying the row and column where the object should be added, and any
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* column or row span if necessary.
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*
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* Again, we could have this design by adding a @ref Table widget to the @c
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* SWALLOW part using elm_object_part_content_set(). The same difference happens
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* here when choosing to use the Layout Table (a @c TABLE part) instead of
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* the @ref Table plus @c SWALLOW part. It's just a matter of convenience.
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*
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* The Layout Table can be used through the @c elm_layout_table_* set of
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* functions.
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*
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* The following picture demonstrates a Layout widget with many child objects
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* added to its @c TABLE part:
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*
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* @image html layout_table.png
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* @image latex layout_table.eps width=\textwidth
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*
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* @section secPredef Predefined Layouts
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*
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* Another interesting thing about the Layout widget is that it offers some
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* predefined themes that come with the default Elementary theme. These
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* themes can be set by the call elm_layout_theme_set(), and provide some
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* basic functionality depending on the theme used.
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*
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* Most of them already send some signals, some already provide a toolbar or
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* back and next buttons.
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*
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* These are available predefined theme layouts. All of them have class = @c
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* layout, group = @c application, and style = one of the following options:
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*
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* @li @c toolbar-content - application with toolbar and main content area
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* @li @c toolbar-content-back - application with toolbar and main content
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* area with a back button and title area
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* @li @c toolbar-content-back-next - application with toolbar and main
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* content area with a back and next buttons and title area
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* @li @c content-back - application with a main content area with a back
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* button and title area
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* @li @c content-back-next - application with a main content area with a
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* back and next buttons and title area
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* @li @c toolbar-vbox - application with toolbar and main content area as a
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* vertical box
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* @li @c toolbar-table - application with toolbar and main content area as a
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* table
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*
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* Supported elm_object common APIs.
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* @li elm_object_signal_emit
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* @li elm_object_signal_callback_add
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* @li elm_object_signal_callback_del
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* @li elm_object_part_text_set
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* @li elm_object_part_text_get
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* @li elm_object_part_content_set
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* @li elm_object_part_content_get
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* @li elm_object_part_content_unset
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*
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* @section secExamples Examples
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*
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* Some examples of the Layout widget can be found here:
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* @li @ref layout_example_01
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* @li @ref layout_example_02
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* @li @ref layout_example_03
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* @li @ref layout_example_edc
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*
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*/
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/**
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* Add a new layout to the parent
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*
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* @param parent The parent object
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* @return The new object or NULL if it cannot be created
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*
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* @see elm_layout_file_set()
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* @see elm_layout_theme_set()
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*
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* @ingroup Layout
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*/
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EAPI Evas_Object *elm_layout_add(Evas_Object *parent);
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/**
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* Set the file that will be used as layout
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*
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* @param obj The layout object
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* @param file The path to file (edj) that will be used as layout
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* @param group The group that the layout belongs in edje file
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*
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* @return (1 = success, 0 = error)
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_file_set(Evas_Object *obj, const char *file, const char *group);
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/**
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* Set the edje group from the elementary theme that will be used as layout
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*
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* @param obj The layout object
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* @param clas the class of the group
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* @param group the group
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* @param style the style to used
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*
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* @return (1 = success, 0 = error)
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_theme_set(Evas_Object *obj, const char *clas, const char *group, const char *style);
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/**
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* Append child to layout box part.
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*
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* @param obj the layout object
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* @param part the box part to which the object will be appended.
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* @param child the child object to append to box.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* Once the object is appended, it will become child of the layout. Its
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* lifetime will be bound to the layout, whenever the layout dies the child
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* will be deleted automatically. One should use elm_layout_box_remove() to
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* make this layout forget about the object.
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*
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* @see elm_layout_box_prepend()
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* @see elm_layout_box_insert_before()
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* @see elm_layout_box_insert_at()
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* @see elm_layout_box_remove()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_box_append(Evas_Object *obj, const char *part, Evas_Object *child);
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/**
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* Prepend child to layout box part.
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*
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* @param obj the layout object
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* @param part the box part to prepend.
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* @param child the child object to prepend to box.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* Once the object is prepended, it will become child of the layout. Its
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* lifetime will be bound to the layout, whenever the layout dies the child
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* will be deleted automatically. One should use elm_layout_box_remove() to
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* make this layout forget about the object.
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*
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* @see elm_layout_box_append()
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* @see elm_layout_box_insert_before()
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* @see elm_layout_box_insert_at()
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* @see elm_layout_box_remove()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_box_prepend(Evas_Object *obj, const char *part, Evas_Object *child);
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/**
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* Insert child to layout box part before a reference object.
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*
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* @param obj the layout object
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* @param part the box part to insert.
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* @param child the child object to insert into box.
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* @param reference another reference object to insert before in box.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* Once the object is inserted, it will become child of the layout. Its
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* lifetime will be bound to the layout, whenever the layout dies the child
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* will be deleted automatically. One should use elm_layout_box_remove() to
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* make this layout forget about the object.
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*
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* @see elm_layout_box_append()
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* @see elm_layout_box_prepend()
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* @see elm_layout_box_insert_before()
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* @see elm_layout_box_remove()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_box_insert_before(Evas_Object *obj, const char *part, Evas_Object *child, const Evas_Object *reference);
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/**
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* Insert child to layout box part at a given position.
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*
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* @param obj the layout object
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* @param part the box part to insert.
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* @param child the child object to insert into box.
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* @param pos the numeric position >=0 to insert the child.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* Once the object is inserted, it will become child of the layout. Its
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* lifetime will be bound to the layout, whenever the layout dies the child
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* will be deleted automatically. One should use elm_layout_box_remove() to
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* make this layout forget about the object.
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*
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* @see elm_layout_box_append()
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* @see elm_layout_box_prepend()
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* @see elm_layout_box_insert_before()
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* @see elm_layout_box_remove()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_box_insert_at(Evas_Object *obj, const char *part, Evas_Object *child, unsigned int pos);
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/**
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* Remove a child of the given part box.
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*
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* @param obj The layout object
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* @param part The box part name to remove child.
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* @param child The object to remove from box.
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* @return The object that was being used, or NULL if not found.
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*
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* The object will be removed from the box part and its lifetime will
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* not be handled by the layout anymore. This is equivalent to
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* elm_object_part_content_unset() for box.
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*
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* @see elm_layout_box_append()
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* @see elm_layout_box_remove_all()
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*
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* @ingroup Layout
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*/
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EAPI Evas_Object *elm_layout_box_remove(Evas_Object *obj, const char *part, Evas_Object *child);
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/**
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* Remove all children of the given part box.
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*
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* @param obj The layout object
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* @param part The box part name to remove child.
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* @param clear If EINA_TRUE, then all objects will be deleted as
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* well, otherwise they will just be removed and will be
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* dangling on the canvas.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* The objects will be removed from the box part and their lifetime will
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* not be handled by the layout anymore. This is equivalent to
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* elm_layout_box_remove() for all box children.
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*
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* @see elm_layout_box_append()
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* @see elm_layout_box_remove()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_box_remove_all(Evas_Object *obj, const char *part, Eina_Bool clear);
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/**
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* Insert child to layout table part.
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*
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* @param obj the layout object
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* @param part the box part to pack child.
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* @param child_obj the child object to pack into table.
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* @param col the column to which the child should be added. (>= 0)
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* @param row the row to which the child should be added. (>= 0)
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* @param colspan how many columns should be used to store this object. (>=
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* 1)
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* @param rowspan how many rows should be used to store this object. (>= 1)
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* Once the object is inserted, it will become child of the table. Its
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* lifetime will be bound to the layout, and whenever the layout dies the
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* child will be deleted automatically. One should use
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* elm_layout_table_remove() to make this layout forget about the object.
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*
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* If @p colspan or @p rowspan are bigger than 1, that object will occupy
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* more space than a single cell. For instance, the following code:
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* @code
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* elm_layout_table_pack(layout, "table_part", child, 0, 1, 3, 1);
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* @endcode
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*
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* Would result in an object being added like the following picture:
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*
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* @image html layout_colspan.png
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* @image latex layout_colspan.eps width=\textwidth
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*
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* @see elm_layout_table_unpack()
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* @see elm_layout_table_clear()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_table_pack(Evas_Object *obj, const char *part, Evas_Object *child_obj, unsigned short col, unsigned short row, unsigned short colspan, unsigned short rowspan);
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/**
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* Unpack (remove) a child of the given part table.
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*
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* @param obj The layout object
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* @param part The table part name to remove child.
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* @param child_obj The object to remove from table.
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* @return The object that was being used, or NULL if not found.
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*
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* The object will be unpacked from the table part and its lifetime
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* will not be handled by the layout anymore. This is equivalent to
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* elm_object_part_content_unset() for table.
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*
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* @see elm_layout_table_pack()
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* @see elm_layout_table_clear()
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*
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* @ingroup Layout
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*/
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EAPI Evas_Object *elm_layout_table_unpack(Evas_Object *obj, const char *part, Evas_Object *child_obj);
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/**
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* Remove all the child objects of the given part table.
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*
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* @param obj The layout object
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* @param part The table part name to remove child.
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* @param clear If EINA_TRUE, then all objects will be deleted as
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* well, otherwise they will just be removed and will be
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* dangling on the canvas.
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* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
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*
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* The objects will be removed from the table part and their lifetime will
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* not be handled by the layout anymore. This is equivalent to
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* elm_layout_table_unpack() for all table children.
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*
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* @see elm_layout_table_pack()
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* @see elm_layout_table_unpack()
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*
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* @ingroup Layout
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*/
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EAPI Eina_Bool elm_layout_table_clear(Evas_Object *obj, const char *part, Eina_Bool clear);
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/**
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* Get the edje layout
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*
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* @param obj The layout object
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*
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* @return A Evas_Object with the edje layout settings loaded
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* with function elm_layout_file_set
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*
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* This returns the edje object. It is not expected to be used to then
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* swallow objects via edje_object_part_swallow() for example. Use
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* elm_object_part_content_set() instead so child object handling and sizing is
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* done properly.
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*
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* @note This function should only be used if you really need to call some
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* low level Edje function on this edje object. All the common stuff (setting
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* text, emitting signals, hooking callbacks to signals, etc.) can be done
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* with proper elementary functions.
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*
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* @see elm_object_signal_callback_add()
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* @see elm_object_signal_emit()
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* @see elm_object_part_text_set()
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* @see elm_object_part_content_set()
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* @see elm_layout_box_append()
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* @see elm_layout_table_pack()
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* @see elm_layout_data_get()
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*
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* @ingroup Layout
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*/
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EAPI Evas_Object *elm_layout_edje_get(const Evas_Object *obj);
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/**
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* Get the edje data from the given layout
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*
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* @param obj The layout object
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* @param key The data key
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*
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* @return The edje data string
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*
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* This function fetches data specified inside the edje theme of this layout.
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* This function return NULL if data is not found.
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*
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* In EDC this comes from a data block within the group block that @p
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* obj was loaded from. E.g.
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*
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* @code
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* collections {
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* group {
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* name: "a_group";
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* data {
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* item: "key1" "value1";
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* item: "key2" "value2";
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* }
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* }
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* }
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* @endcode
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*
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* @ingroup Layout
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*/
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EAPI const char *elm_layout_data_get(const Evas_Object *obj, const char *key);
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/**
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* Eval sizing
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*
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* @param obj The layout object
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*
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* Manually forces a sizing re-evaluation. This is useful when the minimum
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* size required by the edje theme of this layout has changed. The change on
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* the minimum size required by the edje theme is not immediately reported to
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* the elementary layout, so one needs to call this function in order to tell
|
|
* the widget (layout) that it needs to reevaluate its own size.
|
|
*
|
|
* The minimum size of the theme is calculated based on minimum size of
|
|
* parts, the size of elements inside containers like box and table, etc. All
|
|
* of this can change due to state changes, and that's when this function
|
|
* should be called.
|
|
*
|
|
* Also note that a standard signal of "size,eval" "elm" emitted from the
|
|
* edje object will cause this to happen too.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI void elm_layout_sizing_eval(Evas_Object *obj);
|
|
|
|
/**
|
|
* Sets a specific cursor for an edje part.
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
* @param cursor cursor name to use, see Elementary_Cursor.h
|
|
*
|
|
* @return EINA_TRUE on success or EINA_FALSE on failure, that may be
|
|
* part not exists or it has "mouse_events: 0".
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI Eina_Bool elm_layout_part_cursor_set(Evas_Object *obj, const char *part_name, const char *cursor);
|
|
|
|
/**
|
|
* Get the cursor to be shown when mouse is over an edje part
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
* @return the cursor name.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI const char *elm_layout_part_cursor_get(const Evas_Object *obj, const char *part_name);
|
|
|
|
/**
|
|
* Unsets a cursor previously set with elm_layout_part_cursor_set().
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group, that had a cursor set
|
|
* with elm_layout_part_cursor_set().
|
|
* @return @c EINA_TRUE on success, @c EINA_FALSE otherwise
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI Eina_Bool elm_layout_part_cursor_unset(Evas_Object *obj, const char *part_name);
|
|
|
|
/**
|
|
* Sets a specific cursor style for an edje part.
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
* @param style the theme style to use (default, transparent, ...)
|
|
*
|
|
* @return EINA_TRUE on success or EINA_FALSE on failure, that may be
|
|
* part not exists or it did not had a cursor set.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI Eina_Bool elm_layout_part_cursor_style_set(Evas_Object *obj, const char *part_name, const char *style);
|
|
|
|
/**
|
|
* Gets a specific cursor style for an edje part.
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
*
|
|
* @return the theme style in use, defaults to "default". If the
|
|
* object does not have a cursor set, then NULL is returned.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI const char *elm_layout_part_cursor_style_get(const Evas_Object *obj, const char *part_name);
|
|
|
|
/**
|
|
* Sets if the cursor set should be searched on the theme or should use
|
|
* the provided by the engine, only.
|
|
*
|
|
* @note before you set if should look on theme you should define a
|
|
* cursor with elm_layout_part_cursor_set(). By default it will only
|
|
* look for cursors provided by the engine.
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
* @param engine_only if cursors should be just provided by the engine (EINA_TRUE)
|
|
* or should also search on widget's theme as well (EINA_FALSE)
|
|
*
|
|
* @return EINA_TRUE on success or EINA_FALSE on failure, that may be
|
|
* part not exists or it did not had a cursor set.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI Eina_Bool elm_layout_part_cursor_engine_only_set(Evas_Object *obj, const char *part_name, Eina_Bool engine_only);
|
|
|
|
/**
|
|
* Gets a specific cursor engine_only for an edje part.
|
|
*
|
|
* @param obj The layout object.
|
|
* @param part_name a part from loaded edje group.
|
|
*
|
|
* @return whenever the cursor is just provided by engine or also from theme.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
EAPI Eina_Bool elm_layout_part_cursor_engine_only_get(const Evas_Object *obj, const char *part_name);
|
|
|
|
/**
|
|
* @def elm_layout_icon_set
|
|
* Convenience macro to set the icon object in a layout that follows the
|
|
* Elementary naming convention for its parts.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
#define elm_layout_icon_set(_ly, _obj) \
|
|
do { \
|
|
const char *sig; \
|
|
elm_object_part_content_set((_ly), "elm.swallow.icon", (_obj)); \
|
|
if ((_obj)) sig = "elm,state,icon,visible"; \
|
|
else sig = "elm,state,icon,hidden"; \
|
|
elm_object_signal_emit((_ly), sig, "elm"); \
|
|
} while (0)
|
|
|
|
/**
|
|
* @def elm_layout_icon_get
|
|
* Convenience macro to get the icon object from a layout that follows the
|
|
* Elementary naming convention for its parts.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
#define elm_layout_icon_get(_ly) \
|
|
elm_object_part_content_get((_ly), "elm.swallow.icon")
|
|
|
|
/**
|
|
* @def elm_layout_end_set
|
|
* Convenience macro to set the end object in a layout that follows the
|
|
* Elementary naming convention for its parts.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
#define elm_layout_end_set(_ly, _obj) \
|
|
do { \
|
|
const char *sig; \
|
|
elm_object_part_content_set((_ly), "elm.swallow.end", (_obj)); \
|
|
if ((_obj)) sig = "elm,state,end,visible"; \
|
|
else sig = "elm,state,end,hidden"; \
|
|
elm_object_signal_emit((_ly), sig, "elm"); \
|
|
} while (0)
|
|
|
|
/**
|
|
* @def elm_layout_end_get
|
|
* Convenience macro to get the end object in a layout that follows the
|
|
* Elementary naming convention for its parts.
|
|
*
|
|
* @ingroup Layout
|
|
*/
|
|
#define elm_layout_end_get(_ly) \
|
|
elm_object_part_content_get((_ly), "elm.swallow.end")
|
|
|
|
/* smart callbacks called:
|
|
* "theme,changed" - when elm theme is changed.
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|