Tizen Native API  5.5

Copy and paste feature implementations.

Implements the following functionality a. select, copy/cut and paste b. clipboard c. drag and drop in order to share data across application windows.

Contains functions to select text or a portion of data, send it to a buffer, and paste the data into a target.

elm_cnp provides a generic copy and paste facility based on its windowing system. It is not necessary to know the details of each windowing system, but some terms and behavior are common. Currently the X11 window system is widely used, and only X11 functionality is implemented.

In X11R6 window system, CopyPaste works like a peer-to-peer communication. Copying is an operation on an object in an X server. X11 calls those objects 'selections' which have names. Generally, two selection types are needed for copy and paste: The Primary selection and the Clipboard selection. Primary selection is for selecting text (that means highlighted text). Clipboard selection is for explicit copying behavior (such as ctrl+c, or 'copy' in a menu). Thus, in applications most cases only use the clipboard selection. As stated before, taking ownership of a selection doesn't move any actual data. Copying and Pasting is described as follows: 1. Copy text in Program A : Program A takes ownership of the selection 2. Paste text in Program B : Program B notes that Program A owns the selection 3. Program B asks A for the text 4. Program A responds and sends the text to program B 5. Program B pastes the response More information is on

TODO: add for other window system.

Functions

Eina_Bool elm_cnp_selection_set (Evas_Object *obj, Elm_Sel_Type selection, Elm_Sel_Format format, const void *buf, size_t buflen)
 Set copy data for a widget.
Eina_Bool elm_cnp_selection_get (const Evas_Object *obj, Elm_Sel_Type selection, Elm_Sel_Format format, Elm_Drop_Cb datacb, void *udata)
 Get data from a widget that has a selection.
Eina_Bool elm_object_cnp_selection_clear (Evas_Object *obj, Elm_Sel_Type selection)
 Clear the selection data of a widget.
void elm_cnp_selection_loss_callback_set (Evas_Object *obj, Elm_Sel_Type selection, Elm_Selection_Loss_Cb func, const void *data)
 Set a function to be called when a selection is lost.
Eina_Bool elm_drop_target_add (Evas_Object *obj, Elm_Sel_Format format, Elm_Drag_State entercb, void *enterdata, Elm_Drag_State leavecb, void *leavedata, Elm_Drag_Pos poscb, void *posdata, Elm_Drop_Cb dropcb, void *dropdata)
 Determine whether the clipboard selection has an owner.
Eina_Bool elm_drop_target_del (Evas_Object *obj, Elm_Sel_Format format, Elm_Drag_State entercb, void *enterdata, Elm_Drag_State leavecb, void *leavedata, Elm_Drag_Pos poscb, void *posdata, Elm_Drop_Cb dropcb, void *dropdata)
 Deletes the drop target status of an object.
Eina_Bool elm_drag_start (Evas_Object *obj, Elm_Sel_Format format, const char *data, Elm_Xdnd_Action action, Elm_Drag_Icon_Create_Cb createicon, void *createdata, Elm_Drag_Pos dragpos, void *dragdata, Elm_Drag_Accept acceptcb, void *acceptdata, Elm_Drag_State dragdone, void *donecbdata)
 Begins a drag given a source object.
Eina_Bool elm_drag_cancel (Evas_Object *obj)
 Cancels the current drag operation.
Eina_Bool elm_drag_action_set (Evas_Object *obj, Elm_Xdnd_Action action)
 Changes the current drag action.
Eina_Bool elm_drag_item_container_add (Evas_Object *obj, double tm_to_anim, double tm_to_drag, Elm_Xy_Item_Get_Cb itemgetcb, Elm_Item_Container_Data_Get_Cb data_get)
 Set a item container (list, genlist, grid) as source of drag.
Eina_Bool elm_drag_item_container_del (Evas_Object *obj)
 Deletes a item container from drag-source list.
Eina_Bool elm_drop_item_container_add (Evas_Object *obj, Elm_Sel_Format format, Elm_Xy_Item_Get_Cb itemgetcb, Elm_Drag_State entercb, void *enterdata, Elm_Drag_State leavecb, void *leavedata, Elm_Drag_Item_Container_Pos poscb, void *posdata, Elm_Drop_Item_Container_Cb dropcb, void *dropdata)
 Set a item container (list, genlist, grid) as target for drop.
Eina_Bool elm_drop_item_container_del (Evas_Object *obj)
 Removes a container from list of drop targets.

Typedefs

typedef struct
Elm_Cnp_Event_Selection_Changed 
Elm_Cnp_Event_Selection_Changed
typedef Eina_Bool(* Elm_Drop_Cb )(void *data, Evas_Object *obj, Elm_Selection_Data *ev)
typedef Elm_Object_Item *(* Elm_Xy_Item_Get_Cb )(Evas_Object *obj, Evas_Coord x, Evas_Coord y, int *xposret, int *yposret)
typedef void(* Elm_Selection_Loss_Cb )(void *data, Elm_Sel_Type selection)
typedef Evas_Object *(* Elm_Drag_Icon_Create_Cb )(void *data, Evas_Object *win, Evas_Coord *xoff, Evas_Coord *yoff)
typedef void(* Elm_Drag_State )(void *data, Evas_Object *obj)
typedef void(* Elm_Drag_Done )(void *data, Evas_Object *obj, Eina_Bool accepted)
typedef void(* Elm_Drag_Accept )(void *data, Evas_Object *obj, Eina_Bool doaccept)
typedef void(* Elm_Drag_Pos )(void *data, Evas_Object *obj, Evas_Coord x, Evas_Coord y, Elm_Xdnd_Action action)
typedef void(* Elm_Drag_Start )(void *data, Evas_Object *obj)
typedef void(* Elm_Drag_Item_Container_Pos )(void *data, Evas_Object *cont, Elm_Object_Item *it, Evas_Coord x, Evas_Coord y, int xposret, int yposret, Elm_Xdnd_Action action)
typedef Eina_Bool(* Elm_Drop_Item_Container_Cb )(void *data, Evas_Object *obj, Elm_Object_Item *it, Elm_Selection_Data *ev, int xposret, int yposret)
typedef struct _Elm_Drag_User_Info Elm_Drag_User_Info
typedef Eina_Bool(* Elm_Item_Container_Data_Get_Cb )(Evas_Object *obj, Elm_Object_Item *it, Elm_Drag_User_Info *info)

Typedef Documentation

Event to notify when a display server's selection has changed Only sent for PRIMARY and CLIPBOARD selections

Since (EFL) :
1.20
typedef void(* Elm_Drag_Accept)(void *data, Evas_Object *obj, Eina_Bool doaccept)

Callback called when a drag is responded to with an accept or deny

Parameters:
dataApplication specific data
objThe object where the drag started
doacceptA boolean as to if the target accepts the drag or not
Since (EFL) :
1.8
typedef void(* Elm_Drag_Done)(void *data, Evas_Object *obj, Eina_Bool accepted)

Callback called when a drag is finished.

Parameters:
dataApplication specific data
objThe object where the drag started
acceptedTRUE if the dropped data is accepted on drop
Since (EFL) :
1.8
typedef Evas_Object*(* Elm_Drag_Icon_Create_Cb)(void *data, Evas_Object *win, Evas_Coord *xoff, Evas_Coord *yoff)

Callback called to create a drag icon object

Parameters:
dataApplication specific data
winThe window to create the objects relative to
xoffA return coordinate for the X offset at which to place the drag icon object relative to the source drag object
yoffA return coordinate for the Y offset at which to place the drag icon object relative to the source drag object
Returns:
An object to fill the drag window with or NULL if not needed
Since (EFL) :
1.8
typedef void(* Elm_Drag_Item_Container_Pos)(void *data, Evas_Object *cont, Elm_Object_Item *it, Evas_Coord x, Evas_Coord y, int xposret, int yposret, Elm_Xdnd_Action action)

Callback called when a drag is over an object

Parameters:
dataApplication specific data
contThe container object where the drag started
itThe object item in container where mouse-over
xThe X coordinate relative to the top-left of the object
yThe Y coordinate relative to the top-left of the object
xposretPosition relative to item (left (-1), middle (0), right (1)
yposretPosition relative to item (upper (-1), middle (0), bottom (1)
actionThe drag action to be done
Since (EFL) :
1.8
typedef void(* Elm_Drag_Pos)(void *data, Evas_Object *obj, Evas_Coord x, Evas_Coord y, Elm_Xdnd_Action action)

Callback called when a drag is over an object, and gives object-relative coordinates

Parameters:
dataApplication specific data
objThe object where the drag started
xThe X coordinate relative to the top-left of the object
yThe Y coordinate relative to the top-left of the object
Since (EFL) :
1.8
typedef void(* Elm_Drag_Start)(void *data, Evas_Object *obj)

Callback called when a drag starts from an item container

Parameters:
dataApplication specific data
objThe object where the drag started
Since (EFL) :
1.8
typedef void(* Elm_Drag_State)(void *data, Evas_Object *obj)

Callback called when a drag is finished, enters, or leaves an object

Parameters:
dataApplication specific data
objThe object where the drag started
Since (EFL) :
1.8
typedef struct _Elm_Drag_User_Info Elm_Drag_User_Info

Structure describing user information for the drag process.

Parameters:
formatThe drag formats supported by the data (output)
dataThe drag data itself (a string) (output)
iconsif value not NULL, play default anim (output)
actionThe drag action to be done (output)
createiconFunction to call to create a drag object, or NULL if not wanted (output)
createdataApplication data passed to createicon (output)
dragposFunction called with each position of the drag, x, y being screen coordinates if possible, and action being the current action. (output)
dragdataApplication data passed to dragpos (output)
acceptcbFunction called indicating if drop target accepts (or does not) the drop data while dragging (output)
acceptdataApplication data passed to acceptcb (output)
dragdoneFunction to call when drag is done (output)
donecbdataApplication data to pass to dragdone (output)
typedef Eina_Bool(* Elm_Drop_Cb)(void *data, Evas_Object *obj, Elm_Selection_Data *ev)

Callback invoked in when the selected data is 'dropped' at its destination.

Parameters:
dataApplication specific data
objThe evas object where selected data is 'dropped'.
evstruct holding information about selected data FIXME: this should probably be a smart callback
typedef Eina_Bool(* Elm_Drop_Item_Container_Cb)(void *data, Evas_Object *obj, Elm_Object_Item *it, Elm_Selection_Data *ev, int xposret, int yposret)

Callback invoked in when the selected data is 'dropped' on container.

Parameters:
dataApplication specific data
objThe evas object where selected data is 'dropped'.
itThe item in container where drop-cords
evstruct holding information about selected data
xposretPosition relative to item (left (-1), middle (0), right (1)
yposretPosition relative to item (upper (-1), middle (0), bottom (1)

Callback invoked when starting to drag for a container.

Parameters:
objThe container object
itThe Elm_Object_Item pointer where drag-start
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
typedef void(* Elm_Selection_Loss_Cb)(void *data, Elm_Sel_Type selection)

Callback invoked in when the selection ownership for a given selection is lost.

Parameters:
dataApplication specific data
selectionThe selection that is lost
Since (EFL) :
1.7
typedef Elm_Object_Item*(* Elm_Xy_Item_Get_Cb)(Evas_Object *obj, Evas_Coord x, Evas_Coord y, int *xposret, int *yposret)

Callback invoked to find out what object is under (x,y) coords

Parameters:
objThe container object
xcord to check
ycord to check
xposretPosition relative to item (left (-1), middle (0), right (1)
yposretPosition relative to item (upper (-1), middle (0), bottom (1)
Returns:
object under x,y cords or NULL if not found.

Enumeration Type Documentation

Defines the types of content.

Enumerator:
ELM_SEL_FORMAT_TARGETS 

For matching every possible atom

ELM_SEL_FORMAT_NONE 

Content is from outside of Elementary

ELM_SEL_FORMAT_TEXT 

Plain unformatted text: Used for things that don't want rich markup

ELM_SEL_FORMAT_MARKUP 

Edje textblock markup, including inline images

ELM_SEL_FORMAT_IMAGE 

Images

ELM_SEL_FORMAT_VCARD 

Vcards

ELM_SEL_FORMAT_HTML 

Raw HTML-like data (eg. webkit)

Defines the types of selection property names.

See also:
http://www.x.org/docs/X11/xlib.pdf for more details.
Enumerator:
ELM_SEL_TYPE_PRIMARY 

Primary text selection (highlighted or selected text)

ELM_SEL_TYPE_SECONDARY 

Used when primary selection is in use

ELM_SEL_TYPE_XDND 

Drag and Drop

ELM_SEL_TYPE_CLIPBOARD 

Clipboard selection (ctrl+C)

Defines the kind of action associated with the drop data if for XDND

Since (EFL) :
1.8
Enumerator:
ELM_XDND_ACTION_UNKNOWN 

Action type is unknown

ELM_XDND_ACTION_COPY 

Copy the data

ELM_XDND_ACTION_MOVE 

Move the data

ELM_XDND_ACTION_PRIVATE 

Private action type

ELM_XDND_ACTION_ASK 

Ask the user what to do

ELM_XDND_ACTION_LIST 

List the data

ELM_XDND_ACTION_LINK 

Link the data

ELM_XDND_ACTION_DESCRIPTION 

Describe the data


Function Documentation

Eina_Bool elm_cnp_selection_get ( const Evas_Object obj,
Elm_Sel_Type  selection,
Elm_Sel_Format  format,
Elm_Drop_Cb  datacb,
void *  udata 
)

Get data from a widget that has a selection.

Get the current selection data from a widget. The widget input here will usually be elm_entry, in which case datacb and udata can be NULL. If a different widget is passed, datacb and udata are used for retrieving data.

See also:
also elm_cnp_selection_set()
Parameters:
selectionSelection type for copying and pasting
formatSelection format
objThe source widget
datacbThe user data callback if the target widget isn't elm_entry
udataThe user data pointer for datacb
Returns:
If EINA_TRUE, getting selection data was successful.
Since :
3.0f(2.3.1)
void elm_cnp_selection_loss_callback_set ( Evas_Object obj,
Elm_Sel_Type  selection,
Elm_Selection_Loss_Cb  func,
const void *  data 
)

Set a function to be called when a selection is lost.

The function func is set of be called when selection selection is lost to another process or when elm_cnp_selection_set() is called. If func is NULL then it is not called. data is passed as the data parameter to the callback functions and selection is passed in as the selection that has been lost.

elm_cnp_selection_set() and elm_object_cnp_selection_clear() automatically set this los callback to NULL when called. If you wish to take the selection and then be notified of loss please do this (for example):

See also:
also elm_cnp_selection_set()
Parameters:
objThe object to indicate the window target/display system.
selectionSelection to be notified of for loss
funcThe function to call
dataThe data pointer passed to the function.
Since (EFL) :
1.7
Since :
3.0f(2.3.1)
Eina_Bool elm_cnp_selection_set ( Evas_Object obj,
Elm_Sel_Type  selection,
Elm_Sel_Format  format,
const void *  buf,
size_t  buflen 
)

Set copy data for a widget.

Set copy data and take ownership of selection. Format is used for specifying the selection type, and this is used during pasting.

Parameters:
selectionSelection type for copying and pasting
objThe source widget pointer
formatSelection format
bufThe data selected
buflenThe size of buf
Returns:
If EINA_TRUE, setting data was successful.
Since :
3.0f(2.3.1)

Changes the current drag action.

Parameters:
objThe source of a drag if a drag is underway
actionThe drag action to be done
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)

Cancels the current drag operation.

It can only be initiated from the source window.

Parameters:
objThe source of the current drag.
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.9
Since :
3.0f(2.3.1)
Eina_Bool elm_drag_item_container_add ( Evas_Object obj,
double  tm_to_anim,
double  tm_to_drag,
Elm_Xy_Item_Get_Cb  itemgetcb,
Elm_Item_Container_Data_Get_Cb  data_get 
)

Set a item container (list, genlist, grid) as source of drag.

Parameters:
objThe container object.
tm_to_animTime period to wait before start animation.
tm_to_dragTime period to wait before start dragging.
itemgetcbCallback to get Evas_Object pointer for item at (x,y)
data_getCallback to get drag info
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)

Deletes a item container from drag-source list.

Parameters:
objThe target object
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)
Eina_Bool elm_drag_start ( Evas_Object obj,
Elm_Sel_Format  format,
const char *  data,
Elm_Xdnd_Action  action,
Elm_Drag_Icon_Create_Cb  createicon,
void *  createdata,
Elm_Drag_Pos  dragpos,
void *  dragdata,
Elm_Drag_Accept  acceptcb,
void *  acceptdata,
Elm_Drag_State  dragdone,
void *  donecbdata 
)

Begins a drag given a source object.

Parameters:
objThe source object
formatThe drag formats supported by the data
dataThe drag data itself (a string)
actionThe drag action to be done
createiconFunction to call to create a drag object, or NULL if not wanted
createdataApplication data passed to createicon
dragposFunction called with each position of the drag, x, y being screen coordinates if possible, and action being the current action.
dragdataApplication data passed to dragpos
acceptcbFunction called indicating if drop target accepts (or does not) the drop data while dragging
acceptdataApplication data passed to acceptcb
dragdoneFunction to call when drag is done
donecbdataApplication data to pass to dragdone
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)
Eina_Bool elm_drop_item_container_add ( Evas_Object obj,
Elm_Sel_Format  format,
Elm_Xy_Item_Get_Cb  itemgetcb,
Elm_Drag_State  entercb,
void *  enterdata,
Elm_Drag_State  leavecb,
void *  leavedata,
Elm_Drag_Item_Container_Pos  poscb,
void *  posdata,
Elm_Drop_Item_Container_Cb  dropcb,
void *  dropdata 
)

Set a item container (list, genlist, grid) as target for drop.

Parameters:
objThe container object.
formatThe formats supported for dropping
itemgetcbCallback to get Evas_Object pointer for item at (x,y)
entercbThe function to call when the object is entered with a drag
enterdataThe application data to pass to enterdata
leavecbThe function to call when the object is left with a drag
leavedataThe application data to pass to leavedata
poscbThe function to call when the object has a drag over it
posdataThe application data to pass to posdata
dropcbThe function to call when a drop has occurred
dropdataThe application data to pass to dropcb
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)

Removes a container from list of drop targets.

Parameters:
objThe container object
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)
Eina_Bool elm_drop_target_add ( Evas_Object obj,
Elm_Sel_Format  format,
Elm_Drag_State  entercb,
void *  enterdata,
Elm_Drag_State  leavecb,
void *  leavedata,
Elm_Drag_Pos  poscb,
void *  posdata,
Elm_Drop_Cb  dropcb,
void *  dropdata 
)

Determine whether the clipboard selection has an owner.

Parameters:
winThe window object to check for
Returns:
EINA_TRUE if the clipboard has a selection
Since (EFL) :
1.20 Set the given object as a target for drops for drag-and-drop
Parameters:
objThe target object
formatThe formats supported for dropping
entercbThe function to call when the object is entered with a drag
enterdataThe application data to pass to enterdata
leavecbThe function to call when the object is left with a drag
leavedataThe application data to pass to leavedata
poscbThe function to call when the object has a drag over it
posdataThe application data to pass to posdata
dropcbThe function to call when a drop has occurred
dropdataThe application data to pass to dropcb
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)
Eina_Bool elm_drop_target_del ( Evas_Object obj,
Elm_Sel_Format  format,
Elm_Drag_State  entercb,
void *  enterdata,
Elm_Drag_State  leavecb,
void *  leavedata,
Elm_Drag_Pos  poscb,
void *  posdata,
Elm_Drop_Cb  dropcb,
void *  dropdata 
)

Deletes the drop target status of an object.

Parameters:
objThe target object
formatThe formats supported for dropping
entercbThe function to call when the object is entered with a drag
enterdataThe application data to pass to enterdata
leavecbThe function to call when the object is left with a drag
leavedataThe application data to pass to leavedata
poscbThe function to call when the object has a drag over it
posdataThe application data to pass to posdata
dropcbThe function to call when a drop has occurred
dropdataThe application data to pass to dropcb
Returns:
Returns EINA_TRUE, if successful, or EINA_FALSE if not.
Since (EFL) :
1.8
Since :
3.0f(2.3.1)

Clear the selection data of a widget.

Clear all data from the selection which is owned by a widget.

See also:
also elm_cnp_selection_set()
Parameters:
objThe source widget
selectionSelection type for copying and pasting
Returns:
If EINA_TRUE, clearing data was successful.
Since :
3.0f(2.3.1)

Variable Documentation

Event notifying that the selection has changed

See also:
Elm_Cnp_Event_Selection_Changed
Since (EFL) :
1.20