windows-server-2003/shell/themes/themedir/ntl.txt

;-----------------------------------------------------------------
;   NTL - Native Theme Language - 07/10/00
;-----------------------------------------------------------------

Overview:
---------

An .ntl file describes the brushes, lines, rectangles, curves,
and shapes needed to draw control parts.

The .ntl file is uses the standard Windows .ini file format with multiple
sections and multiple "property = value" lines within each section.

There are 2 section types supported:

    [OptionBits] - used to declare the option bit names/mappings used by the
                   drawing sections

    [Drawing(xxx)] - used to describe how to draw the state named "xxx"


OptionBits Section:
-------------------

The [OptionBits] section contains properties lines of the form:

    <name> = <number>

The <name> declares an option bit, whose bit number is specified by <number>.  These 
options bits are passed by the theme-aware control in the lower 16 bits of the last DWORD 
param to DrawThemeBackground().

Once an optionbit is declared, its value can be tested by an "if" property in the [Drawing.xxx]
sections.


Drawing Sections:
-----------------

There are 3 types of drawing that can be done in a drawing section.  A section can contain one
or more of these but each type should complete before the next type starts.

   1. Collapsing Border drawing
   
      In this mode, successive outer borders of a certain color, width, and height are drawn
      from the original rectangle specified for the control part inward, towards the center
      of the part.  Properties allowed in this mode are:

        AddBorder = SIZE <size4> COLOR <color4>

        FillBorder = COLOR <color>
        FillBorder = IMAGEFILE <imagefile>
        FillBorder = NONE

      Notes:
        - "FillRect" fills the adjusted rectangle with the specified color or 
          by tiling the specified bitmap

   2. FreeHand drawing

        In this mode, we describe a brush and then can move, paint lines, and paint curves.  There
        is no filling involved.  The x,y point coordinates range from 0-1000, unless the 
        "LogicalRect" property is specified to overrides them.  These points are mapped at runtime
        to the part's actual rectangle.  
        
        Properties allowed in this mode are:

        LogicalRect = RECT <rect>

        FillBrush = COLOR <color>
        FillBrush = IMAGEFILE <imagefile>
        FillBrush = NONE

        LineBrush = COLOR <color> SIZE <size1>
        LineBrush = NONE

        MoveTo = POINT <point>
        LineTo = POINT <point>
        CurveTo = CP1 <point> CP2 <point> POINT <point>

   3. Filled Shape drawing
   
      In this mode, we describe a line brush and a fill brush and then describe the lines
      and curves of the shape.  After the border of the shape is drawn with the
      line brush, it is filled with the fill brush.  Properties allowed in this mode are:
      
        Shape = POINT <point>

            FillBrush = COLOR <color>
            FillBrush = IMAGEFILE <imagefile>
            FillBrush = NONE

            LineBrush = COLOR <color> SIZE <size1>
            LineBrush = NONE

            LogicalRect = RECT <rect>

            LineTo = POINT <point>
            CurveTo = CP1 <point> CP2 <point> POINT <point>

        EndShape = POINT <point>

        Notes: 
            - A Shape subsection must start with a "Shape" property and end with a
              "EndShape" property

            - "LineBrush" and "FillBrush" can only be specified once and must be the
              first 2 properties after "Shape". 


There are also some general properties that can appear anywhere in a section (with the exception of
"GotoState", which if used, must be placed at the end of a section).  These properties are:

    if = <option bit name> (on)
    if = <option bit name> (off)
    
    else = <option bit name> (on)
    else = <option bit name> (off)

    endif = <option bit name>

    SetOption = <option bit name> (on)
    SetOption = <option bit name> (off)

    GotoState = <state name>

Note: when an "else" property is used, it must match the most recent, unmatched "if" property
and have the opposite on/off setting.

Each "if" property must be matched with an "endif" property of the same 
<option bit name>.


Parameters:
-----------

    <imagefile>
        ::= [ INDEX <number> ]

    <color>
        ::= <red number> <green number> <blue number>
        ::= <system color name (ex: WindowFrame)>
        ::= NONE

    <color4>
        ::= <color>
        ::= <color> "," <color>
        ::= <color> "," <color> "," <color> "," <color>
                
    <point>
        ::= <x number> <y number>

    <rect>
        ::= <left number> <top number> <right number> <bottom number> 

    <size1>
        ::= <size>

    <size2>
        ::= <size> 
        ::= <size> "," <size>

    <size4>
        ::= <size> 
        ::= <size> "," <size>
        ::= <size> "," <size> "," <size> "," <size>

    <size>
        ::= <number>
        ::= <system metric name (ex: BorderWidth)>