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Xfc::Gtk::SelectionData Class Reference

A GtkSelectionData C++ wrapper class. More...

#include <xfc/gtk/selection.hh>

Inheritance diagram for Xfc::Gtk::SelectionData:

Xfc::G::Boxed Xfc::Object Xfc::Trackable List of all members.

Public Member Functions

Constructors
Accessors
Methods
Drag-and-Drop Methods

Detailed Description

A GtkSelectionData C++ wrapper class.

The selection mechanism provides the basis for different types of communication between processes. In particular, drag-and-drop and Clipboard work via selections. You will very seldom or never need to use most of the functions in this section directly; Clipboard provides a nicer interface to the same functionality. Some of the datatypes defined in this section are used in the Clipboard and drag-and-drop API's as well.

The SelectionData object is used to store a chunk of data along with the data type and other associated information.

See also: the Selection HOWTO and example.

Constructor & Destructor Documentation

Xfc::Gtk::SelectionData::SelectionData (  GtkSelectionData *  data  )  [explicit]
 

Construct a new SelectionData from an existing GtkSelectionData.

Parameters:
data A pointer to a GtkSelectionData.
The data can be a newly created GtkSelectionData or an existing GtkSelectionData. The SelectionData object created is a temporary object. It doesn't take over the ownership of GtkSelectionData and GtkSelectionData is not freed by the destructor.

Xfc::Gtk::SelectionData::SelectionData (  GtkSelectionData *  data,
bool  copy
) 
 

Construct a new SelectionData from an existing GtkSelectionData.

Parameters:
data A pointer to a GtkSelectionData.
copy Whether the SelectionData object should make a copy of GtkSelectionData or not.
The data can be a newly created GtkSelectionData or an existing GtkSelectionData. If copy is true SelectionData will make a copy of GtkSelectionData. If copy is false SelectionData wont make a copy but instead takes over the ownership of GtkSelectionData. Either way, the destructor will free GtkSelectionData when the SelectionData object is destroyed. This constructor is used by G::Boxed::wrap() to wrap GtkSelectionData objects in a C++ wrapper.

Member Function Documentation

Pointer<Gdk::Pixbuf> Xfc::Gtk::SelectionData::get_pixbuf (   )  const
 

Gets the contents of the selection data as a Gdk::Pixbuf.

Returns:
A smart pointer to a Gdk::Pixbuf.
If the selection data contained a recognized image type and it could be converted to a Gdk::Pixbuf, a pixbuf is returned, otherwise a null pointer is returned.

bool Xfc::Gtk::SelectionData::get_row_drag_data (  TreeModel **  model,
Pointer< TreePath > *  path
)  const
 

Obtains a model and path from selection data of target type GTK_TREE_MODEL_ROW.

Parameters:
model A pointer to a TreeModel pointer.
path A pointer to a smart TreePath pointer to hold the path to a row in tree_model.
Returns:
true if SelectionData had target type GTK_TREE_MODEL_ROW and is otherwise valid.
Normally called from a drag_data_received handler. This method can only be used if SelectionData originates from the same process that's calling this method, because a pointer to the tree model is being passed around. If you aren't in the same process, then you'll get memory corruption. In the TreeDragDest drag_data_received handler, you can assume that SelectionData of type GTK_TREE_MODEL_ROW is from the current process. If the target type is wrong this method returns false.

bool Xfc::Gtk::SelectionData::get_targets (  std::vector< String > &  targets  )  const
 

Gets the contents of the selection data as a vector of String corresponding to the atoms that define the targets available.

Parameters:
targets A reference to a vector of String to store the names of targets.
Returns:
true if selection data contains a valid targets, otherwise false.
This can be used to interpret the results of getting the standard TARGETS target that is always supplied for any selection.

bool Xfc::Gtk::SelectionData::get_targets (  std::vector< Gdk::Atom > &  targets  )  const
 

Gets the contents of the selection data as a vector of Gdk::Atom that defines the targets available.

Parameters:
targets A reference to a vector of Gdk::Atom to store the list of targets.
Returns:
true if selection data contains a valid targets, otherwise false.
This can be used to interpret the results of getting the standard TARGETS target that is always supplied for any selection.

String Xfc::Gtk::SelectionData::get_text (   )  const
 

Gets the contents of the selection data as a UTF-8 string.

Returns:
If the selection data contained a recognized text type and it could be converted to UTF-8, a String containing the converted text, otherwise a null String.

std::vector<String> Xfc::Gtk::SelectionData::get_uris (   )  const
 

Gets the contents of the selection data as a vector of URI Strings.

Returns:
A vector of String that holds the URIs.
If the selection data contained no URIs the returned vector of String will be empty.

void Xfc::Gtk::SelectionData::set (  Gdk::Atom  type,
int  format,
const void *  data,
int  length
) 
 

Stores new data in this SelectionData object.

Parameters:
type The type of selection data.
format The format (number of bits in a unit).
data The pointer to the data (will be copied).
length The length of the data.
Should only be called from a selection handler callback. Zero-terminates the stored data.

bool Xfc::Gtk::SelectionData::set_pixbuf (  Gdk::Pixbuf &  pixbuf  ) 
 

Sets the contents of the selection from a Gdk::Pixbuf.

Parameters:
pixbuf A Gdk::Pixbuf
Returns:
true if the selection was successfully set, otherwise false.
The pixbuf is converted to the form determined by selection_data->target.

bool Xfc::Gtk::SelectionData::set_row_drag_data (  TreeModel &  tree_model,
const TreePath &  path
) 
 

Sets selection data of target type GTK_TREE_MODEL_ROW.

Parameters:
tree_model A reference to a TreeModel.
path A row in tree_model.
Returns:
true if the SelectionData had the proper target type to allow us to set a tree row.
Normally used in a drag_data_get handler. If the target type is wrong this method returns false.

bool Xfc::Gtk::SelectionData::set_text (  const String &  str  ) 
 

Sets the contents of the selection from a UTF-8 encoded string.

The string is converted to the form determined by target().

Parameters:
str A UTF-8 string.
Returns:
true if the selection was successfully set, otherwise false.

bool Xfc::Gtk::SelectionData::set_uris (  const std::vector< String > &  uris  ) 
 

Sets the contents of the selection from a list of URIs.

Parameters:
uris A vector of String holding the URIs.
Returns:
true if the selection was successfully set, otherwise false.
The strings are converted to the form determined by selection_data->target.

bool Xfc::Gtk::SelectionData::targets_include_image (  bool  writable  )  const
 

Given a Gtk::SelectionData object holding a list of targets, determines if any of the targets in targets can be used to provide a Gdk::Pixbuf.

Parameters:
writable Whether to accept only targets for which GTK+ knows how to convert a pixbuf into the format
Returns:
true if the selection data holds a list of targets, and a suitable target for images is included, otherwise false.

The documentation for this class was generated from the following file: Xfce Foundation Classes
Copyright © 2004-2005 The XFC Development Team XFC 4.3