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Toplevel(n)                                       [incr Tk]                                      Toplevel(n)



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NAME
       Toplevel - base class for mega-widgets in a top-level window

INHERITANCE
       itk::Archetype <- itk::Toplevel

STANDARD OPTIONS
       background      cursor

       See the "options" manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS
       Name:   title
       Class:  Title
       Command-Line Switch:    -title

              Sets  the  title  that  the  window  manager  displays in the title bar above the window.  The
              default title is the null string.
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DESCRIPTION
       The Toplevel class inherits everything from the Archetype class, and adds a Tk  toplevel  called  the
       "hull" component to represent the body of the mega-widget.  The window class name for the hull is set
       to the most-specific class name for the mega-widget.  The protected  variable  itk_interior  contains
       the  window  path  name  for the "hull" component.  Derived classes specialize this widget by packing
       other widget components into the hull.

       Since the hull for the Toplevel class is implemented with a Tk toplevel, mega-widgets in the Toplevel
       class  have  their  own  toplevel window.  This class is used to create dialog boxes and other pop-up
       windows.


COMPONENTS
       Name:           hull
       Class:          Toplevel

              The "hull" component acts as the body for the entire mega-widget.  Other components are packed
              into the hull to further specialize the widget.


EXAMPLE
       The  following  example  implements  a MessageInfo mega-widget.  It creates a pop-up message that the
       user can dismiss by pushing the "Dismiss" button.
              option add *MessageInfo.title "Notice" widgetDefault

              itcl::class MessageInfo {
                  inherit itk::Toplevel

                  constructor {args} {
                      itk_component add dismiss {
                          button $itk_interior.dismiss -text "Dismiss"                 -command "destroy $itk_component(hull)"
                      }
                      pack $itk_component(dismiss) -side bottom -pady 4

                      itk_component add separator {
                          frame $itk_interior.sep -height 2 -borderwidth 1 -relief sunken
                      }
                      pack $itk_component(separator) -side bottom -fill x -padx 4

                      itk_component add icon {
                          label $itk_interior.icon -bitmap info
                      }
                      pack $itk_component(icon) -side left -padx 8 -pady 8

                      itk_component add infoFrame {
                          frame $itk_interior.info
                      }
                      pack $itk_component(infoFrame) -side left -expand yes             -fill both -padx 4 -pady 4

                      itk_component add message {
                          label $itk_interior.mesg -width 20
                      } {
                          usual
                          rename -text -message message Text
                      }
                      pack $itk_component(message) -expand yes -fill both

                      eval itk_initialize $args

                      after idle [code $this centerOnScreen]
                  }

                  protected method centerOnScreen {} {
                      update idletasks
                      set wd [winfo reqwidth $itk_component(hull)]
                      set ht [winfo reqheight $itk_component(hull)]
                      set x [expr ([winfo screenwidth $itk_component(hull)]-$wd)/2]
                      set y [expr ([winfo screenheight $itk_component(hull)]-$ht)/2]
                      wm geometry $itk_component(hull) +$x+$y
                  }
              }

              itk::usual MessageInfo {
                  keep -background -cursor -foreground -font
                  keep -activebackground -activeforeground -disabledforeground
                  keep -highlightcolor -highlightthickness
              }

              #
              # EXAMPLE:  Create a notice window:
              #
              MessageInfo .m -message "File not found:\n/usr/local/bin/foo"


KEYWORDS
       itk, Archetype, Widget, mega-widget



itk                                                  3.0                                         Toplevel(n)