NAME¶
Tk::FileDialog - A highly configurable File Dialog widget for Perl/Tk.
DESCRIPTION¶
The widget is composed of a number of sub-widgets, namely, a listbox for files
and (optionally) directories, an entry for filename, an (optional) entry for
pathname, an entry for a filter pattern, a 'ShowAll' checkbox (for enabling
display of .* files and directories), and three buttons, namely OK, Rescan,
and Cancel. Note that the labels for all subwidgets (including the text for
the buttons and Checkbox) are configurable for foreign language support. The
Listboxes will respond to characters typed over them with scrolling to the
first line that starts with the given character (or next etc. if this
character is not present).
SYNOPSIS¶
Usage Description¶
To use FileDialog, simply create your FileDialog objects during initialization
(or at least before a Show). When you wish to display the FileDialog, invoke
the 'Show' method on the FileDialog object; The method will return either a
file name, a path name, or undef. undef is returned only if the user pressed
the Cancel button.
Example Code¶
The following code creates a FileDialog and calls it. Note that perl5.002gamma
is required.
#!/usr/bin/perl -w
use Tk;
use Tk::FileDialog;
use strict;
my($main) = MainWindow->new;
my($Horiz) = 1;
my($fname);
my($LoadDialog) = $main->FileDialog(-Title =>'This is my title',
-Create => 0);
print "Using FileDialog Version ",$LoadDialog->Version,"\n";
$LoadDialog->configure(-FPat => '*pl',
-ShowAll => 'NO');
$main->Entry(-textvariable => \$fname)
->pack(-expand => 1,
-fill => 'x');
$main->Button(-text => 'Kick me!',
-command => sub {
$fname = $LoadDialog->Show(-Horiz => $Horiz);
if (!defined($fname)) {
$fname = "Fine,Cancel, but no Chdir anymore!!!";
$LoadDialog->configure(-Chdir =>'NO');
}
})
->pack(-expand => 1,
-fill => 'x');
$main->Checkbutton(-text => 'Horizontal',
-variable => \$Horiz)
->pack(-expand => 1,
-fill => 'x');
$main->Button(-text => 'Exit',
-command => sub {
$main->destroy;
})
->pack(-expand => 1,
-fill => 'x');
MainLoop;
print "Exit Stage right!\n";
exit;
METHODS¶
The following non-standard methods may be used with a FileDialog object
Show¶
Displays the file dialog box for the user to operate. Additional configuration
items may be passed in at Show-time In other words, this code snippet:
$fd->Show(-Title => 'Ooooh, Preeeeeety!');
is the same as this code snippet:
$fd->configure(-Title => 'Ooooh, Preeeeeety!');
$fd->Show;
Version¶
Returns the current Version of FileDialog
CONFIGURATION¶
Any of the following configuration items may be set via the configure (or Show)
method, or retrieved via the cget method.
Flags¶
Flags may be configured with either 1,'true', or 'yes' for 1, or 0, 'false', or
'no' for 0. Any portion of 'true', 'yes', 'false', or 'no' may be used, and
case does not matter.
- -Chdir
- Enable the user to change directories. The default is 1. If
disabled, the directory list box will not be shown.
- -Create
- Enable the user to specify a file that does not exist. If
not enabled, and the user specifies a non-existent file, a dialog box will
be shown informing the user of the error (This Dialog Box is configurable
via the EDlg* switches, below).
default: 1
- -ShowAll
- Determines whether hidden files (.*) are displayed in the
File and Directory Listboxes. The default is 0. The Show All Checkbox
reflects the setting of this switch.
- -DisableShowAll
- Disables the ability of the user to change the status of
the ShowAll flag. The default is 0 (the user is by default allowed to
change the status).
- -Grab
- Enables the File Dialog to do an application Grab when
displayed. The default is 1.
- -Horiz
- True sets the File List box to be to the right of the
Directory List Box. If 0, the File List box will be below the Directory
List box. The default is 1.
- -SelDir
- If True, enables selection of a directory rather than a
file, and disables the actions of the File List Box. The default is
0.
Special¶
- -FPat
- Sets the default file selection pattern. The default is
'*'. Only files matching this pattern will be displayed in the File List
Box.
- -Geometry
- Sets the geometry of the File Dialog. Setting the size is a
dangerous thing to do. If not configured, or set to '', the File Dialog
will be centered.
- -SelHook
- SelHook is configured with a reference to a routine that
will be called when a file is chosen. The file is called with a sole
parameter of the full path and file name of the file chosen. If the Create
flag is disabled (and the user is not allowed to specify new files), the
file will be known to exist at the time that SelHook is called. Note that
SelHook will also be called with directories if the SelDir Flag is
enabled, and that the FileDialog box will still be displayed. The
FileDialog box should not be destroyed from within the SelHook
routine, although it may generally be configured.
SelHook routines return 0 to reject the selection and allow the user to
reselect, and any other value to accept the selection. If a SelHook
routine returns non-zero, the FileDialog will immediately be withdrawn,
and the file will be returned to the caller.
There may be only one SelHook routine active at any time. Configuring the
SelHook routine replaces any existing SelHook routine. Configuring the
SelHook routine with 0 removes the SelHook routine. The default SelHook
routine is undef.
Strings¶
The following two switches may be used to set default variables, and to get
final values after the Show method has returned (but has not been explicitly
destroyed by the caller)
- -File
- The file selected, or the default file. The default is
''.
- -Path
- The path of the selected file, or the initial path. The
default is $ENV{'HOME'}.
Labels and Captions¶
For support of internationalization, the text on any of the subwidgets may be
changed.
- -Title
- The Title of the dialog box. The default is 'Select
File:'.
- -DirLBCaption
- The Caption above the Directory List Box. The default is
'Directories'.
- -FileLBCaption
- The Caption above the File List Box. The default is
'Files'.
- -FileEntryLabel
- The label to the left of the File Entry. The Default is
'Filename:'.
- -PathEntryLabel
- The label to the left of the Path Entry. The default is
'Pathname:'.
- -FltEntryLabel
- The label to the left of the Filter entry. The default is
'Filter:'.
- -ShowAllLabel
- The text of the Show All Checkbutton. The default is 'Show
All'.
Button Text¶
For support of internationalization, the text on the three buttons may be
changed.
- -OKButtonLabel
- The text for the OK button. The default is 'OK'.
- -RescanButtonLabel
- The text for the Rescan button. The default is
'Rescan'.
- -CancelButtonLabel
- The text for the Cancel button. The default is
'Cancel'.
Error Dialog Switches¶
If the Create switch is set to 0, and the user specifies a file that does not
exist, a dialog box will be displayed informing the user of the error. These
switches allow some configuration of that dialog box.
- -EDlgTitle
- The title of the Error Dialog Box. The default is 'File
does not exist!'.
- -EDlgText
- The message of the Error Dialog Box. The variables $path,
$file, and $filename (the full path and filename of the selected file) are
available. The default is "You must specify an existing
file.\n(\$filename not found)"
Author¶
Brent B. Powers, Merrill Lynch (B2Pi)
powers@ml.com
This code may be distributed under the same conditions as Perl itself.