Tk::chooseDirectory - pops up a dialog box for the user to select a directory.
$widget->chooseDirectory( ?option value
...? );
The method chooseDirectory is implemented as a perl wrapper on the core
tk "command" tk_chooseDirectory, and
$widget is passed as the argument to the hidden
-parent option.
The chooseDirectory method pops up a dialog box for the
user to select a directory. The following option-value pairs are
possible as command line arguments:
- -initialdir dirname
- Specifies that the directories in directory should be displayed
when the dialog pops up. If this parameter is not specified, then the
directories in the current working directory are displayed. If the
parameter specifies a relative path, the return value will convert the
relative path to an absolute path. This option may not always work on the
Macintosh. This is not a bug. Rather, the General Controls control
panel on the Mac allows the end user to override the application default
directory.
- -parent $widget
- Makes $widget the logical parent of the dialog.
The dialog is displayed on top of its parent window.
- -title titleString
- Specifies a string to display as the title of the dialog box. If this
option is not specified, then a default title will be displayed.
- -mustexist boolean
- Specifies whether the user may specify non-existant directories. If this
parameter is true, then the user may only select directories that already
exist. The default value is false.
Perl does not have a concept of encoded filesystems yet. This means that
operations on filenames like "opendir" and
"open" still use byte semantics. Tk however
uses character semantics internally, which means that you can get filenames
with the UTF-8 flag set in functions like
"chooseDirectory",
"getOpenFile" and similar. It's the user's
responsibility to determine the encoding of the underlying filesystem and
convert the result into bytes, e.g.
use Encode;
...
my $dir = $mw->chooseDirectory;
$dir = encode("windows-1252", $dir);
opendir DIR, $dir or die $!;
...
See also "When Unicode Does Not Happen" in perlunicode
and "Unicode in Filenames" in perltodo.
my $dir = $mw->chooseDirectory(-initialdir => '~',
-title => 'Choose a directory');
if (!defined $dir) {
warn 'No directory selected';
} else {
warn "Selected $dir";
}
Tk::getOpenFile, Tk::getOpenFile
directory selection dialog