Package org.eclipse.swt.widgets

Class FileDialog

java.lang.Object

org.eclipse.swt.widgets.Dialog

org.eclipse.swt.widgets.FileDialog

public class FileDialog
extends Dialog

Instances of this class allow the user to navigate the file system and select or enter a file name.

Styles:

SAVE, OPEN, MULTI

Events:

(none)

Note: Only one of the styles SAVE and OPEN may be specified.

IMPORTANT: This class is not intended to be subclassed.

See Also:

• FileDialog snippets
• SWT Example: ControlExample, Dialog tab
• Sample code and further information

Restriction:

This class is not intended to be subclassed by clients.

Constructor Summary

Constructors

Constructor	Description
FileDialog(Shell parent)	Constructs a new instance of this class given only its parent.
FileDialog(Shell parent, int style)	Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Method Summary

Modifier and Type	Method	Description
String	getFileName()	Returns the path of the first file that was selected in the dialog relative to the filter path, or an empty string if no such file has been selected.
String[]	getFileNames()	Returns a (possibly empty) array with the paths of all files that were selected in the dialog relative to the filter path.
String[]	getFilterExtensions()	Returns the file extensions which the dialog will use to filter the files it shows.
int	getFilterIndex()	Get the 0-based index of the file extension filter which was selected by the user, or -1 if no filter was selected.
String[]	getFilterNames()	Returns the names that describe the filter extensions which the dialog will use to filter the files it shows.
String	getFilterPath()	Returns the directory path that the dialog will use, or an empty string if this is not set.
boolean	getOverwrite()	Returns the flag that the dialog will use to determine whether to prompt the user for file overwrite if the selected file already exists.
String	open()	Makes the dialog visible and brings it to the front of the display.
Optional<String>	openDialog()	Makes the dialog visible and brings it to the front of the display.
void	setFileName(String string)	Set the initial filename which the dialog will select by default when opened to the argument, which may be null.
void	setFilterExtensions(String[] extensions)	Set the file extensions which the dialog will use to filter the files it shows to the argument, which may be null.
void	setFilterIndex(int index)	Set the 0-based index of the file extension filter which the dialog will use initially to filter the files it shows to the argument.
void	setFilterNames(String[] names)	Sets the names that describe the filter extensions which the dialog will use to filter the files it shows to the argument, which may be null.
void	setFilterPath(String string)	Sets the directory path that the dialog will use to the argument, which may be null.
void	setOverwrite(boolean overwrite)	Sets the flag that the dialog will use to determine whether to prompt the user for file overwrite if the selected file already exists.

Methods inherited from class org.eclipse.swt.widgets.Dialog

checkSubclass, getParent, getStyle, getText, setText

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FileDialog

public FileDialog(Shell parent)

Constructs a new instance of this class given only its parent.

Parameters:

parent - a shell which will be the parent of the new instance

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

FileDialog

public FileDialog(Shell parent,
 int style)

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

Parameters:

parent - a shell which will be the parent of the new instance

style - the style of dialog to construct

Throws:

IllegalArgumentException -

• ERROR_NULL_ARGUMENT - if the parent is null

SWTException -

• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
• ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass

See Also:

• SWT.SAVE
• SWT.OPEN
• SWT.MULTI

Method Details

getFileName

public String getFileName()

Returns the path of the first file that was selected in the dialog relative to the filter path, or an empty string if no such file has been selected.

Returns:

the relative path of the file

getFileNames

public String[] getFileNames()

Returns a (possibly empty) array with the paths of all files that were selected in the dialog relative to the filter path.

Returns:

the relative paths of the files

getFilterExtensions

public String[] getFilterExtensions()

Returns the file extensions which the dialog will use to filter the files it shows.

Returns:

the file extensions filter

getFilterIndex

public int getFilterIndex()

Get the 0-based index of the file extension filter which was selected by the user, or -1 if no filter was selected.

This is an index into the FilterExtensions array and the FilterNames array.

Returns:

index the file extension filter index

Since:

3.4

See Also:

• getFilterExtensions()
• getFilterNames()

getFilterNames

public String[] getFilterNames()

Returns the names that describe the filter extensions which the dialog will use to filter the files it shows.

Returns:

the list of filter names

getFilterPath

public String getFilterPath()

Returns the directory path that the dialog will use, or an empty string if this is not set. File names in this path will appear in the dialog, filtered according to the filter extensions.

Returns:

the directory path string

See Also:

• setFilterExtensions(java.lang.String[])

getOverwrite

public boolean getOverwrite()

Returns the flag that the dialog will use to determine whether to prompt the user for file overwrite if the selected file already exists.

Returns:

true if the dialog will prompt for file overwrite, false otherwise

Since:

3.4

open

public String open()

Makes the dialog visible and brings it to the front of the display.

Returns:

a string describing the absolute path of the first selected file, or null if the dialog was cancelled or an error occurred

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the dialog has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog

openDialog

public Optional<String> openDialog()

Makes the dialog visible and brings it to the front of the display. Equal to open() but also exposes for state information like user cancellation.

Returns:

an Optional that either contains the absolute path of the first selected file or is empty in case the dialog was canceled

Throws:

SWTException -

• ERROR_WIDGET_DISPOSED - if the dialog has been disposed
• ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog
• ERROR_INVALID_RETURN_VALUE - if the dialog was not cancelled and did not return a valid path

Since:

3.126

setFileName

public void setFileName(String string)

Set the initial filename which the dialog will select by default when opened to the argument, which may be null. The name will be prefixed with the filter path when one is supplied.

Parameters:

string - the file name

setFilterExtensions

public void setFilterExtensions(String[] extensions)

Set the file extensions which the dialog will use to filter the files it shows to the argument, which may be null.

The strings are platform specific. For example, on some platforms, an extension filter string is typically of the form "*.extension", where "*.*" matches all files. For filters with multiple extensions, use semicolon as a separator, e.g. "*.jpg;*.png".

Note: On Mac, setting the file extension filter affects how app bundles are treated by the dialog. When a filter extension having the app extension (.app) is selected, bundles are treated as files. For all other extension filters, bundles are treated as directories. When no filter extension is set, bundles are treated as files.

Parameters:

extensions - the file extension filter

See Also:

• to specify the user-friendly names corresponding to the extensions

setFilterIndex

public void setFilterIndex(int index)

Set the 0-based index of the file extension filter which the dialog will use initially to filter the files it shows to the argument.

This is an index into the FilterExtensions array and the FilterNames array.

Parameters:

index - the file extension filter index

Since:

3.4

See Also:

• setFilterExtensions(java.lang.String[])
• setFilterNames(java.lang.String[])

setFilterNames

public void setFilterNames(String[] names)

Sets the names that describe the filter extensions which the dialog will use to filter the files it shows to the argument, which may be null.

Each name is a user-friendly short description shown for its corresponding filter. The names array must be the same length as the extensions array.

Parameters:

names - the list of filter names, or null for no filter names

See Also:

• setFilterExtensions(java.lang.String[])

setFilterPath

public void setFilterPath(String string)

Sets the directory path that the dialog will use to the argument, which may be null. File names in this path will appear in the dialog, filtered according to the filter extensions. If the string is null, then the operating system's default filter path will be used.

Note that the path string is platform dependent. For convenience, either '/' or '\' can be used as a path separator.

Parameters:

string - the directory path

See Also:

• setFilterExtensions(java.lang.String[])

setOverwrite

public void setOverwrite(boolean overwrite)

Sets the flag that the dialog will use to determine whether to prompt the user for file overwrite if the selected file already exists.

Note: On some platforms where suppressing the overwrite prompt is not supported, the prompt is shown even when invoked with overwrite false.

Parameters:

overwrite - true if the dialog will prompt for file overwrite, false otherwise

Since:

3.4