XFONT - An IDL Widget for Font Selection

This modal widget allows the selection and viewing of all
the X Window fonts available on the X Window server.

Fonts fall into two classes: Registered and Private.
Registered fonts have been registered with the X Window
consortium and their names follow a defined descriptive
syntax.  Private fonts are server specific and their
names do not follow the font name syntax.

Registered fonts may be selected on the basis of:

  Foundry - The name of the type foundry that
	supplied the font.
  Family - "family" of typeface design.
  Weight - the nominal blackness of the font.  Typical
	values are: bold, light, and normal.
  Slant - R = roman for upright design.
	  I = Italic
	  O = Oblique
  Width - the font's typographic proportionate width:
	  Normal, Condensed, Narrow, or Double Wide.
  Size - the font's point size expressed in decipoints.
	For example, 120 designates a 12 point font.


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Controls are:

OK - return with the selected font.

Cancel - return with no font.

View - creates a window that displays all 255 characters
	of the selected font.  Clicking in this window
	removes it.  Rows and columns are labelled with
	their hexadecimal indices.

Help - displays this text.

Registered / Private - selects either the registered
	font set or the private font set.

DeciPoint Size text widget - (active only if scalable fonts
	exist and a point size of 0 is selected.)  designates the
	size of the font, in decipoints.  For example, enter 120
	to obtain a 12 point font.

Foundry button:
Family button:
Weight button:
Slant button:
Width button:
Size button:	Pressing these buttons sets the respective
	attribute's selection to '*' (all available) and displays
	the available selections for that attribute in the list
	widget to the right.  Clicking on the available attribute
	item in the right-hand list widget selects that attribute.

Center List Widget:  displays the available fonts
	matching the selected attributes.  Clicking on a font
	name selects that font.  If private fonts are selected,
	all the private fonts are displayed in this list widget.

Current font:  the name of the currently selected font.
	If more than one font matches the selected attributes,
	the first matching font is displayed.

Display text:  The text that is displayed in the view
	window below.  This text may be edited.