Tk/Wizard version 1.01 - Wizard GUI Framework ============================================= INSTALLATION To install this module type the following: perl Makefile.PL make make test make install SYNOPSIS use Tk::Wizard; # Instantiate a Wizard my $wizard = new Tk::Wizard( -title => "A title", -imagepath => "/image/for/the/left/panel.gif", ); # Create pages my $SPLASH = $wizard->addPage( sub{ page_splash ($wizard)} ); my $COPYRIGHT_PAGE = $wizard->addLicencePage( -filepath => "end_user_licence.txt" ); my $GET_PREFS = $wizard->addPage( sub{ page_get_prefs($wizard) }); my $user_chosen_dir; my $GET_DIR = $wizard->addDirSelectPage ( -variable => \$user_chosen_dir ) my $INSTALL_FILES = $wizard->addPage( sub{ page_install_files($wizard,$user_chosen_dir) }); my $FINISH = $wizard->addPage( sub{ page_finish($wizard) }); $wizard->Show(); MainLoop; sub page_get_prefs { my $wizard = shift; my $frame = $wizard->blank_frame(-title=>"The First Page",-text=>"This is page one..."); # .... return $frame; } sub preNextButtonAction { my $wizard = shift; $_ = $wizard->currentPage; if (/^$SPLASH$/){ warn "Pressed NEXT in the splash page ($SPLASH)"; return 1; } elsif (/^$COPYRIGHT_PAGE$/){ return $wizard->callback_licence_agreement; } elsif (/^$GET_DIR/){ return $wizard->callback_dirSelect( \$user_chosen_dir ); } # ... } __END__ DESCRIPTION The "Tk::Wizard" module automates a large part of the creation of a wizard program to collect information and then perform some complex task based upon it. The wizard feel is largly based upon the Microsoft(TM,etc) wizard style. The Wizard was developed to aid software installation by end-users using ActiveState's ActivePerl, but should function under under OS and circumstances. There are a number of routines specific to software installation, which may be removed to a sub-class at a later date. THIS IS AN ALPHA RELEASE: ALL CONTRIBUTIONS ARE WELCOME! ACTION EVENT HANDLERS "Tk::Wizard" action event handlers are code-references called at the press of a "Tk::Wizard" button. The handler functions should return a Boolean value, signifying whether the remainder of the action should continue. If a false value is returned, execution of the event handler halts. All active event handlers can be set at construction or using "configure" - see the CONSTRUCTOR (new) entry elsewhere in this document and the METHOD configure entry elsewhere in this document. -preNextButtonAction => This is a reference to a function that will be dispatched before the Next button is processed. -postNextButtonAction => This is a reference to a function that will be dispatched after the Next button is processed. -prePrevButtonAction => This is a reference to a function that will be dispatched before the Previous button is processed. -postPrevButtonAction => This is a reference to a function that will be dispatched after the Previous button is processed. -preHelpButtonAction => This is a reference to a function that will be dispatched before the Help button is processed. -helpButtonAction => This is a reference to a function that will be dispatched to handle the Help button action. -postHelpButtonAction => This is a reference to a function that will be dispatched after the Help button is processed. -preFinishButtonAction => This is a reference to a function that will be dispatched before the Finish button is processed. -finishButtonAction => This is a reference to a funciton that will be dispatched to handle the Finish button action. -postFinishButtonAction => This is a reference to a function that will be dispatched after the Finish button is processed. -preCancelButtonAction => This is a reference to a function that will be dispatched before the Cancel button is processed. Default is to exit on user confirmation - see the METHOD DIALOGUE_really_quit entry elsewhere in this document. -preCloseWindowAction => This is a reference to a funciton that will be dispatched before the window is issued a close command. Default is to exit on user confirmation - see the DIALOGUE METHOD DIALOGUE_really_quit entry elsewhere in this document. CONSTRUCTOR (new) Tk::Wizard->new( -name1=>"value1"...-nameN=>"valueN" ) Creates a new instance of the Tk::Wizard object as a "MainWindow", or in the supplied "MainWindow" (see below). Standard paramters, appyling to the "MainWindow": -width -height -background Non-standard parameters: -title => This is the title that will be displayed in the Windows title bar -imagepath => Path to a JPEG file that will be displayed on the left-hand side of the screen. -mw => Optionally a TK "MainWindow" for the Wizard to occupy. If none is supplied, one is created. -style => If supplied and is "top", will put the image at the top. Could do more.... -nohelpbutton => Set to anything to disable the display of the help buton. Action Event Handlers: See the ACTION EVENT HANDLERS entry elsewhere in this document for details. All paramters can be set after construction using "configure" - see the METHOD configure entry elsewhere in this document. As the "Tk::Wizard" object also controls the *Next* and *Previous* buttons, you can set the configuration - use the "cancelButtonRef" and "prevButtonRef" object fields: $wizard->{prevButtonRef}->configure( -state => "disabled" ) The default font is created by the constructor as 8pt Verdana, named "DEFAULT_FONT" and placed in the object's "defaultFont" field. All references to the default font in the Wizard call this routine, so changing the default is easy. Privately, "licence_agree" flags whether the end-user licence agreement has been accepted. METHODS METHOD configure Allows the configuration of all object properties. =cut sub configure { my $self = shift; my %newHandlers = ( @_ ); foreach( keys %newHandlers) { $self->{$_} = $newHandlers{$_}; } } METHOD addPage $wizard->addPage ($page_code_ref) This method is used to add a Wizard page to the wizard. The $page parameter must be a Tk::Frame object. The pages are stored and will be displayed in the order that they were added to the Wizard control. METHOD Show C->Show() This method must be dispatched before the Wizard will be displayed, and must preced the "MainLoop" call. METHOD currentPage my $current_page = $wizard->currentPage() This returns the index of the page that is currently shown. Pages are indexed starting at 1 with the first page that is associated with the wizard through the addWizardPage method. METHOD parent my $parent_window = C->parent This returns areference to the parent Tk widget that was used to create the wizard and all of the controls. By default, returns a reference to the main window. Defined at construction - see the CONSTRUCTOR (new) entry elsewhere in this document.. METHOD blank_frame my ($frame,@packing) = C->blank_frame(-title=>$title,-text=>$standfirst); Returns a "Tk::Frame" object that is a child of the Wizard control. Some padding parameters are applied to the frame by the wizard control; Arguments are name/value pairs: -title => Printed in a big, bold font at the top of the frame as a title -text => Printed under the title in standard font. Also: -width -height -background -font METHOD addLicencePage $wizard->addLicencePage ( -filepath => $path_to_licence_text ) Adds a page that contains a scroll texxt box of a licence text file specifed in the "-filepath" argument. Presents the user with two options, accept and continue, or not accept and quit. The user *cannot* progress until the 'agree' option has been chosen. You could supply the GNU Artistic Licence.... See the CALLBACK callback_licence_agreement entry elsewhere in this document and the METHOD page_licence_agreement entry elsewhere in this document. METHOD addDirSelectPage $wizard->addDirSelectPage ( -variable => \$chosen_dir ) Adds a page that contains a scroll texxt box of all directories including, on Win32, logical drives. You can also specify the "-title" and "-text" paramters, as in the METHOD blank_frame entry elsewhere in this document. See the CALLBACK callback_dirSelect entry elsewhere in this document. CALLBACK callback_licence_agreement Intended to be used with an action-event handler like "-preNextButtonAction", this routine check that the object field "licence_agree" is a Boolean true value. If that operand is not set, it warns the user to read the licence; if that operand is set to a Boolean false value, a message box says goodbye and quits the program. CALLBACK callback_dirSelect A callback to check that the directory, passed as a reference in the sole argument, exists, and can and should be created. Will not allow the Wizard to continue unless a directory has been chosen. If the chosen directory does not exist, Setup will ask if it should create it. If the user affirms, it is created; otherwise the user is again asked to chose a directory. Returns a Boolean value. DIALOGUE METHOD DIALOGUE_really_quit The default routine called when the user clicks *Cancel* or attempts to close the window ("-preCancelButtonAction" and "-preCloseWindowAction"). Justs asks 'Are you sure?' Calls "exit" if they are. DIALOGUE METHOD prompt Equivalent to the JavaScript method of the same name: pops up a dialogue box to get a text string, and returns it. Arguemnts are: -parent => "Tk" object that is our parent window. Default's to our "parent" field. -title => The title of the dialogue box. -text => The text to display above the "Entry" widget. -value => The initial value of the "Entry" box. -wraplength => Text "Label"'s wraplength: defaults to 275. -width => The "Entry" widget's width: defaults to 40. =back LEGACY METHOD wpFrame my $frame = C->wpFrame; Returns a "Tk::Frame" object that is a child of the Wizard control. It should be used when creating wizard pages since some padding parameters are applied to it by the wizard control. CAVEATS / BUGS * Nothing is currently done to ensure text fits into the window - it is currently up to the client to make frames "Scrolled"), as I'm having problems making "&blank_frame" produce them. * Dimenions are not yet fixed - more of my novice Tk problems! * When The *New Directory* button in the "addDirSelectPage" method is used to create a new directory, the "DirTree" object does not open the branch. How can it? * If a Wizard is one page long, the "FINISH" button will not appear as expected. CHANGES VERSION 1.01 * Made the supply of a "MainWindow" to the constructor optional, and changed the supply method from a reference to part of the passed name/value list. * Changed "filename" field to "-imagepath" for readability. * Made all arguments begin with "-" to fit in with Tk "switches". * Added method "blank_frame" that can take title and standfirst text. * Added a bit of space between the Wizard body and the button footer. * Added default font and background. * Added licence agreement bits. VERSION 1.0 Initial version by Daniel T Hable, found with Google, at http://perlmonks.thepen.com/139336.html. AUTHORS Daniel T Hable, Lee Goddard (lgoddard@cpan.org). COPYRIGHT Copyright (c) 2002 Daniel T Hable. Modifications Copyright (C) Lee Goddard, 2002. 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