# scrolledlistbox - Create and manipulate scrolled listbox widgets

## SYNOPSIS

scrolledlistbox pathName ?options?

## INHERITANCE

itk::Widget <- Labeledwidget <- Scrolledwidget <- Scrolledlistbox

## STANDARD OPTIONS

activeBackground exportSelection relief | background foreground selectBackground | borderWidth highlightColor selectBorderWidth | cursor highlightThickness selectForeground

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

## ASSOCIATED OPTIONS

selectMode |  |  |

See the "listbox" widget manual entry for details on the above associated options.

activeRelief | elementBorderwidth | jump | troughColor

See the "scrollbar" widget manual entry for details on the above associated options.

## INHERITED OPTIONS

disabledForeground labelMargin state | labelBitmap labelPos | labelFont labelText | labelImage labelVariable

See the "labeledwidget" class manual entry for details on the inherited options.

## WIDGET-SPECIFIC OPTIONS

    Name:                   dblClickCommand
    Class:                  Command
    Command-Line Switch:	-dblclickcommand

Specifies a Tcl command procedure which is called when an item is double clicked. Typically this occurs when mouse button 1 is double clicked over an item. Selection policy does not matter.

    Name:                   height
    Class:                  Height
    Command-Line Switch:	-height

Specifies the height of the scrolled list box as an entire unit. The value may be specified in any of the forms acceptable to Tk_GetPixels. Any additional space needed to display the other components such as labels, margins, and scrollbars force the listbox to be compressed. A value of zero along with the same value for the width causes the value given for the visibleitems option to be applied which administers geometry constraints in a different manner. The default height is zero.

    Name:                   hscrollMode
    Class:                  ScrollMode
    Command-Line Switch:	-hscrollmode

Specifies the the display mode to be used for the horizontal scrollbar: static, dynamic, or none. In static mode, the scroll bar is displayed at all times. Dynamic mode displays the scroll bar as required, and none disables the scroll bar display. The default is static.

    Name:                   sbWidth
    Class:                  Width
    Command-Line Switch:	-sbwidth

Specifies the width of the scrollbar in any of the forms acceptable to Tk_GetPixels. The default width is 15 pixels..

    Name:                   scrollMargin
    Class:                  Margin
    Command-Line Switch:	-scrollmargin

Specifies the distance between the listbox and scrollbar in any of the forms acceptable to Tk_GetPixels. The default is 3 pixels.

    Name:                   selectionCommand
    Class:                  Command
    Command-Line Switch:	-selectioncommand

Specifies a Tcl command procedure which is called when an item is selected. Selection policy does not matter.

    Name:                   state
    Class:                  State
    Command-Line Switch:	-state

Specifies one of two states for the listbox: normal or disabled. If the listbox is disabled then selection is ignored. The default is normal.

    Name:                   textBackground
    Class:                  Background
    Command-Line Switch -textbackground

Specifies the background color for the listbox. This allows the background within the listbox to be different from the normal background color.

    Name:                   textFont
    Class:                  Font
    Command-Line Switch:	-textfont

Specifies the font to be used for text in the listbox. This allows for the font associated with text internal to the scrolled listbox to be different than the font for labels.

    Name:                   visibleitems
    Class:                  VisibleItems
    Command-Line Switch:	-visibleitems

Specifies the widthxheight in characters and lines for the listbox. This option is only administered if the width and height options are both set to zero, otherwise they take precedence. The default value is 20x10. With the visibleitems option engaged, geometry constraints are maintained only on the listbox. The size of the other components such as labels, margins, and scroll bars, are additive and independent, effecting the overall size of the scrolled list box. In contrast, should the width and height options have non zero values, they are applied to the scrolled list box as a whole. The listbox is compressed or expanded to maintain the geometry constraints.

    Name:                   vscrollMode
    Class:                  ScrollMode
    Command-Line Switch:	-vscrollmode

Specifies the the display mode to be used for the vertical scrollbar: static, dynamic, or none. In static mode, the scroll bar is displayed at all times. Dynamic mode displays the scroll bar as required, and none disables the scroll bar display. The default is static.

    Name:                   width
    Class:                  Width
    Command-Line Switch:	-width

Specifies the width of the scrolled list box as an entire unit. The value may be specified in any of the forms acceptable to Tk_GetPixels. Any additional space needed to display the other components such as labels, margins, and scrollbars force the listbox to be compressed. A value of zero along with the same value for the height causes the value given for the visibleitems option to be applied which administers geometry constraints in a different manner. The default width is zero.

## DESCRIPTION

The scrolledlistbox command creates a scrolled listbox with additional options to manage horizontal and vertical scrollbars. This includes options to control which scrollbars are displayed and the method, i.e. statically or dynamically.

## METHODS

The scrolledlistbox command creates a new Tcl command whose name is pathName. This command may be used to invoke various operations on the widget. It has the following general form:

    pathName option ?arg arg ...?

Option and the args determine the exact behavior of the command.

Many of the widget commands for a scrolledlistbox take as one argument an indicator of which entry of the list box to operate on. These indicators are called indexes and may be specified in any of the following forms:

number

  Specifies the element as a numerical index, where 0 corresponds to the first element in the listbox.
  active
    Indicates the element that has the location cursor. This element will be displayed with an underline when the listbox has the keyboard focus, and it is specified with the activate widget command.
  anchor
    Indicates the anchor point for the selection, which is set with the selection anchor widget command.
  end
    Indicates the end of the listbox. For some commands this means just after the last element; for other commands it means the last element.
  @x,y
    Indicates the element that covers the point in the listbox window specified by x and y (in pixel coordinates). If no element covers that point, then the closest element to that point is used.
  pattern
    If the index doesn't satisfy one of the above forms then this form is used. Pattern is pattern-matched against the items in the list box, in order from the top down, until a matching entry is found. The rules of Tcl_StringMatch are used.

  The following widget commands are possible for scrolledlistbox widgets:

  ## ASSOCIATED METHODS

  activate get scan xview | bbox index see yview | curselection insert selection | delete nearest size

  See the "listbox" manual entry for details on the associated methods.

  ## WIDGET-SPECIFIC METHODS

  pathName cget option
    Returns the current value of the configuration option given by option. Option may have any of the values accepted by the scrolledlistbox command.
  pathName clear
    Clears the listbox of all items.
  pathName configure ?option? ?value option value ...?
    Query or modify the configuration options of the widget. If no option is specified, returns a list describing all of the available options for pathName (see Tk_ConfigureInfo for information on the format of this list). If option is specified with no value, then the command returns a list describing the one named option (this list will be identical to the corresponding sublist of the value returned if no option is specified). If one or more option-value pairs are specified, then the command modifies the given widget option(s) to have the given value(s); in this case the command returns an empty string. Option may have any of the values accepted by the scrolledlistbox command.
  pathName getcurselection
    Returns the contents of the listbox element indicated by the current selection indexes. Short cut version of get and curselection command combination.
  pathName justify direction
    Justifies the list contents via teh scroll bars in one of four directions: left, right, top, or bottom.
  pathName selecteditemcount
    Returns the number of items currently selected in the list.
  pathName sort order
    Sort the current list in either ascending or descending order. The values increasing and decreasing are also accepted.

  ## COMPONENTS

      Name:                   listbox
      Class:                  listbox

  The listbox component is the listbox widget. See the "listbox" widget manual entry for details on the listbox component item.

      Name:                   horizsb
      Class:                  Scrollbar

  The horizsb component is the horizontal scroll bar. See the "scrollbar" widget manual entry for details on the horizsb component item.

      Name:                   vertsb
      Class:                  Scrollbar

  The vertsb component is the vertical scroll bar. See the "scrollbar" widget manual entry for details on the vertsb component item.

  ## EXAMPLE

       option add *textBackground white
       proc selCmd {} {
          puts stdout "[.slb getcurselection]"
       }
       proc defCmd {} {
          puts stdout "Double Click"
          return [selCmd]
       }
       scrolledlistbox .slb -selection single \\
          -vscrollmode static -hscrollmode dynamic -labeltext "List" \\
          -selectioncommand selCmd -dblclickcommand defCmd
       pack .slb -padx 10 -pady 10 -fill both -expand yes
       .slb insert end {Hello {Out There} World}

  ## AUTHOR

  Mark L. Ulferts

  ## KEYWORDS

  scrolledlistbox, listbox, widget