juce::DirectoryIterator Class Reference

Searches through the files in a directory, returning each file that is found. More...

#include <juce_DirectoryIterator.h>

Collaboration diagram for juce::DirectoryIterator:

Classes
struct	NativeIterator

Public Member Functions
	DirectoryIterator (const File &directory, bool isRecursive, const String &wildCard="*", int whatToLookFor=File::findFiles)
	Creates a DirectoryIterator for a given directory. More...
	~DirectoryIterator ()
	Destructor. More...
float	getEstimatedProgress () const
	Returns a guess of how far through the search the iterator has got. More...
const File &	getFile () const
	Returns the file that the iterator is currently pointing at. More...
bool	next ()
	Moves the iterator along to the next file. More...
bool	next (bool *isDirectory, bool *isHidden, int64 *fileSize, Time *modTime, Time *creationTime, bool *isReadOnly)
	Moves the iterator along to the next file, and returns various properties of that file. More...

Static Private Member Functions
static bool	fileMatches (const StringArray &wildCards, const String &filename)
static StringArray	parseWildcards (const String &pattern)

Private Attributes
File	currentFile
NativeIterator	fileFinder
bool	hasBeenAdvanced = false
int	index = -1
const bool	isRecursive
String	path
std::unique_ptr< DirectoryIterator >	subIterator
int	totalNumFiles = -1
const int	whatToLookFor
String	wildCard
StringArray	wildCards

Detailed Description

Searches through the files in a directory, returning each file that is found.

A DirectoryIterator will search through a directory and its subdirectories using a wildcard filepattern match.

If you may be scanning a large number of files, it's usually smarter to use this class than File::findChildFiles() because it allows you to stop at any time, rather than having to wait for the entire scan to finish before getting the results.

Please note that the order in which files are returned is completely undefined! They'll arrive in whatever order the underlying OS calls provide them, which will depend on the filesystem and other factors. If you need a sorted list, you'll need to manually sort them using your preferred comparator after collecting the list.

It also provides an estimate of its progress, using a (highly inaccurate!) algorithm.

{Core}

Constructor & Destructor Documentation

DirectoryIterator()

juce::DirectoryIterator::DirectoryIterator	(	const File &	directory,
		bool	isRecursive,
		const String &	wildCard = "*",
		int	whatToLookFor = File::findFiles
	)

Creates a DirectoryIterator for a given directory.

After creating one of these, call its next() method to get the first file - e.g.

DirectoryIterator iter (File ("/animals/mooses"), true, "*.moose");

while (iter.next())
{
    File theFileItFound (iter.getFile());

    ... etc
}

Parameters

directory	the directory to search in
isRecursive	whether all the subdirectories should also be searched
wildCard	the file pattern to match. This may contain multiple patterns separated by a semi-colon or comma, e.g. "*.jpg;*.png"
whatToLookFor	a value from the File::TypesOfFileToFind enum, specifying whether to look for files, directories, or both.

~DirectoryIterator()

juce::DirectoryIterator::~DirectoryIterator

(

)

Destructor.

Member Function Documentation

fileMatches()

static bool juce::DirectoryIterator::fileMatches ( const StringArray &  wildCards, const String &  filename  )

staticprivate

getEstimatedProgress()

float juce::DirectoryIterator::getEstimatedProgress

(

)

const

Returns a guess of how far through the search the iterator has got.

Returns

a value 0.0 to 1.0 to show the progress, although this won't be very accurate.

getFile()

const File& juce::DirectoryIterator::getFile

(

)

const

Returns the file that the iterator is currently pointing at.

The result of this call is only valid after a call to next() has returned true.

next() [1/2]

bool juce::DirectoryIterator::next

(

)

Moves the iterator along to the next file.

Returns

true if a file was found (you can then use getFile() to see what it was) - or false if there are no more matching files.

next() [2/2]

bool juce::DirectoryIterator::next	(	bool *	isDirectory,
		bool *	isHidden,
		int64 *	fileSize,
		Time *	modTime,
		Time *	creationTime,
		bool *	isReadOnly
	)

Moves the iterator along to the next file, and returns various properties of that file.

If you need to find out details about the file, it's more efficient to call this method than to call the normal next() method and then find out the details afterwards.

All the parameters are optional, so pass null pointers for any items that you're not interested in.

Returns

true if a file was found (you can then use getFile() to see what it was) - or false if there are no more matching files. If it returns false, then none of the parameters will be filled-in.

parseWildcards()

static StringArray juce::DirectoryIterator::parseWildcards ( const String &  pattern )

staticprivate

Member Data Documentation

currentFile

File juce::DirectoryIterator::currentFile

private

fileFinder

NativeIterator juce::DirectoryIterator::fileFinder

private

hasBeenAdvanced

bool juce::DirectoryIterator::hasBeenAdvanced = false

private

index

int juce::DirectoryIterator::index = -1

private

isRecursive

const bool juce::DirectoryIterator::isRecursive

private

path

String juce::DirectoryIterator::path

private

subIterator

std::unique_ptr<DirectoryIterator> juce::DirectoryIterator::subIterator

private

totalNumFiles

int juce::DirectoryIterator::totalNumFiles = -1

mutableprivate

whatToLookFor

const int juce::DirectoryIterator::whatToLookFor

private

wildCard

String juce::DirectoryIterator::wildCard

private

wildCards

StringArray juce::DirectoryIterator::wildCards

private

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The documentation for this class was generated from the following file:

• juce_DirectoryIterator.h