wxPathList Class Reference

#include <wx/filefn.h>

Inheritance diagram for wxPathList:

Detailed Description

The path list is a convenient way of storing a number of directories, and when presented with a filename without a directory, searching for an existing file in those directories.

Be sure to look also at wxStandardPaths if you only want to search files in some standard paths.

Library:  wxBase

Category:  File Handling

See Also

wxArrayString, wxStandardPaths, wxFileName

Public Member Functions
	wxPathList ()
	Standard constructor.
	wxPathList (const wxArrayString &arr)
	Constructs the object calling the Add() function.
bool	Add (const wxString &path)
	Adds the given directory to the path list, if the path is not already in the list.
void	Add (const wxArrayString &arr)
	Adds all elements of the given array as paths.
void	AddEnvList (const wxString &env_variable)
	Finds the value of the given environment variable, and adds all paths to the path list.
bool	EnsureFileAccessible (const wxString &filename)
	Given a full filename (with path), calls Add() with the path of the file.
wxString	FindAbsoluteValidPath (const wxString &file) const
	Like FindValidPath() but this function always returns an absolute path (eventually prepending the current working directory to the value returned wxPathList::FindValidPath()) or an empty string.
wxString	FindValidPath (const wxString &file) const
	Searches the given file in all paths stored in this class.
Public Member Functions inherited from wxArrayString
	wxArrayString ()
	Default constructor.
	wxArrayString (const wxArrayString &array)
	Copy constructor.
	wxArrayString (size_t sz, const wxString *arr)
	Constructor from a wxString array.
	~wxArrayString ()
	Destructor frees memory occupied by the array strings.
size_t	Add (const wxString &str, size_t copies=1)
	Appends the given number of copies of the new item str to the array and returns the index of the first new item in the array.
void	Alloc (size_t nCount)
	Preallocates enough memory to store nCount items.
void	Clear ()
	Clears the array contents and frees memory.
void	Empty ()
	Empties the array: after a call to this function GetCount() will return 0.
size_t	GetCount () const
	Returns the number of items in the array.
int	Index (const wxString &sz, bool bCase=true, bool bFromEnd=false) const
	Search the element in the array, starting from the beginning if bFromEnd is false or from end otherwise.
void	Insert (wxString lItem, size_t nIndex, size_t copies=1)
	Insert the given number of copies of the new element in the array before the position nIndex.
bool	IsEmpty () const
	Returns true if the array is empty, false otherwise.
void	Remove (const wxString &sz)
	Removes the first item matching this value.
void	RemoveAt (size_t nIndex, size_t count=1)
	Removes count items starting at position nIndex from the array.
void	Shrink ()
	Releases the extra memory allocated by the array.
void	Sort (bool reverseOrder=false)
	Sorts the array in alphabetical order or in reverse alphabetical order if reverseOrder is true.
void	Sort (CompareFunction compareFunction)
	Sorts the array using the specified compareFunction for item comparison.
bool	operator!= (const wxArrayString &array) const
	Compares 2 arrays respecting the case.
wxArrayString &	operator= (const wxArrayString &)
	Assignment operator.
bool	operator== (const wxArrayString &array) const
	Compares 2 arrays respecting the case.
wxString &	operator[] (size_t nIndex) const
	Return the array element at position nIndex.
	wxArrayString (size_t sz, const char **arr)
	Constructor from a C string array.
	wxArrayString (size_t sz, const wchar_t **arr)
	Constructor from a C string array.
wxString &	Item (size_t nIndex)
	Return the array element at position nIndex.
const wxString &	Item (size_t nIndex) const
	Return the array element at position nIndex.
wxString &	Last ()
	Returns the last element of the array.
const wxString &	Last () const
	Returns the last element of the array.

Additional Inherited Members
Public Types inherited from wxArrayString
typedef int(*	CompareFunction )(const wxString &first, const wxString &second)
	The function type used with wxArrayString::Sort().

Constructor & Destructor Documentation

wxPathList::wxPathList

(

)

Standard constructor.

wxPathList::wxPathList

(

const wxArrayString &

arr

)

Constructs the object calling the Add() function.

Member Function Documentation

bool wxPathList::Add

(

const wxString &

path

)

Adds the given directory to the path list, if the path is not already in the list.

If the path cannot be normalized for some reason, it returns false.

The path is always considered to be a directory but no existence checks will be done on it (because if it doesn't exist, it could be created later and thus result a valid path when FindValidPath() is called).

Note

if the given path is relative, it won't be made absolute before adding it (this is why FindValidPath() may return relative paths).

void wxPathList::Add

(

const wxArrayString &

arr

)

Adds all elements of the given array as paths.

void wxPathList::AddEnvList

(

const wxString &

env_variable

)

Finds the value of the given environment variable, and adds all paths to the path list.

Useful for finding files in the PATH variable, for example.

bool wxPathList::EnsureFileAccessible

(

const wxString &

filename

)

Given a full filename (with path), calls Add() with the path of the file.

wxString wxPathList::FindAbsoluteValidPath

(

const wxString &

file

)

const

Like FindValidPath() but this function always returns an absolute path (eventually prepending the current working directory to the value returned wxPathList::FindValidPath()) or an empty string.

wxString wxPathList::FindValidPath

(

const wxString &

file

)

const

Searches the given file in all paths stored in this class.

The first path which concatenated to the given string points to an existing file (see wxFileExists()) is returned.

If the file wasn't found in any of the stored paths, an empty string is returned.

The given string must be a file name, eventually with a path prefix (if the path prefix is absolute, only its name will be searched); i.e. it must not end with a directory separator (see wxFileName::GetPathSeparator) otherwise an assertion will fail.

The returned path may be relative to the current working directory.

Note in fact that wxPathList can be used to store both relative and absolute paths so that if you added relative paths, then the current working directory (see wxGetCwd() and wxSetWorkingDirectory()) may affect the value returned by this function!