This Dokument covers the following topics:

• Name and Location of the Style Sheets

• Editing the Style Sheets

• Modifying the Position of the Main Output and of the PF Keys

• Modifying the Font Size

• Modifying the Font Type

• Defining Underlined and Blinking Text

• Defining Italic Text

• Defining Bold Text

• Defining Different Styles for Output Fields

• Modifying the Natural Windows

• Modifying the Message Line

• Modifying the Background Color

• Modifying the Color Attributes

• Modifying the Style of the PF Key Buttons

• JavaScript and XSLT Files

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Name and Location of the Style Sheets

Several aspects on a page (such as font, font style or color) are controlled by a style sheet (CSS file).

The Natural Web I/O Interface client is delivered with the style sheet 3270.css, which is located in:

../natuniapp.ear/natuniweb.war/resources

Editing the Style Sheets

It is recommended that you have a basic understanding of CSS files.

You can edit the predefined style sheets or create your own style sheets.

It is recommended that you work with backup copies. When a problem occurs with your style sheet, you can thus always revert to the original state.

To see your changes in the browser, you have to

1. delete the browser's cache, and

2. restart the session.

Modifying the Position of the Main Output and of the PF Keys

Applies when only the named PF keys are displayed. This feature cannot be used when all PF keys are displayed, since they are always displayed at the same position. See also Overview of Session Options.

The following elements are available:

Element Name	Description
.mainlayer	Controls the position of the main output in the output window. Used for languages that are written from left-to-right (LTR).
.mainlayer_rtl	Controls the position of the main output in the output window. Used for languages that are written from right-to-left (RTL).
.pfkeydiv	Controls the position of the PF keys in the output window. Used for languages that are written from left-to-right (LTR).
.pfkeydiv_rtl	Controls the position of the PF keys in the output window. Used for languages that are written from right-to-left (RTL).

The *_rtl elements are only used if Natural sends the web I/O screen with a right-to-left flag (SET CONTROL 'VON'). In the browser, the screen elements are then shown on the right side (instead of the left side).

For web I/O in applications where only the left-to-right orientation is used, the *_rtl elements are not required.

If the PF keys are to appear at the bottom, define the elements as shown in the following example:

/* Defines the main screen position  */
.mainlayer {
    top: 5px;  
    left: 0px;
    height: 550px;
}

/* Defines the main screen position for right-to-left  */
.mainlayer_rtl{
    top: 5px;  
    right: 30px;
    height: 550px;
}

/* Defines the PF keys screen position */
.pfkeydiv {
    height: 70px;
    left: 0px;
    top: 580px;
    width: 100%;    
}

/* Defines the PF keys screen position for right-to-left */
.pfkeydiv_rtl {
    height: 70px;
    right: 30px;    
    top: 580px;
    width: 100%;
}

Modifying the Font Size

Depending on the screen resolution, one of the following style sheets for defining the font size is used in addition to the default style sheet:

• model2.css

• model3.css

• model4.css

• model5.css

These style sheets are located in the tmodels subdirectory of the resources directory in which all style sheets are located.

Depending on what comes closest to the standard 3270 screen model, the corresponding style sheet from the tmodels subdirectory is automatically used. It is selected according to the following criteria:

Standard 3270 Screen Model	Criteria	Style Sheet
Model 2 (80x24)	30 rows or less.	model2.css
Model 3 (80x32)	Between 31 and 40 rows.	model3.css
Model 4 (80x43)	41 rows or more.	model4.css
Model 5 (132x27)	30 rows or less, and more than 100 columns.	model5.css

The font sizes in the above style sheets can be adjusted. Example for model4.css:

body {
     font-size: 10px;
}

The default font sizes for the above 3270 screen models are:

Standard 3270 Screen Model	Default Font Size
Model 2	16px
Model 3	14px
Model 4	10px
Model 5	12px

Modifying the Font Type

As a rule, you should only use monospace fonts such as Courier New or Lucida Console. With these fonts, all characters have the same width. Otherwise, when using variable-width fonts, the output will appear deformed.

If you want to define a different font type, you should define the same font type for the body, the output fields and the input fields as shown in the following example:

body { 
    background-color: #F3F5F0; 
    font-family: Lucida Console; 
    }

.OutputField {
    white-space:pre; 
    border-width:0;     
    font-family: Lucida Console;
    font-size: 100%;	
}

.InputField { 
    background-color: white;      
    font-family: Lucida Console;
    border-width: 1px;
    font-size: 100%;
    border-color: #A7A9AB;
}

Use the CSS at-rule @font-face to specify a custom font with which to display text.

For example, Arabic fonts to be used with InputFields for the presentation of "Arabic-Indic numerals" instead of "European numerals":

@font-face {
font-family: CustomFont;
src: url( CustomFont.woff );
}

Defining Underlined and Blinking Text

The following elements are available:

Element Name	Description
.natTextDecoUnderline	Defines underlined text.
.natTextDecoBlinking	Defines blinking text.
.natTextDecoNormal	Defines normal text (no underline, no blinking).

Example:

/* Text decoration */
.natTextDecoUnderline { text-decoration:underline; }
.natTextDecoBlinking {text-decoration:blink; }
.natTextDecoNormal {text-decoration:normal;}

Blinking text is not supported by the Internet Explorer.

Defining Italic Text

The following elements are available:

Element Name	Description
.natFontStyleItalic	Defines italic text.
.natFontStyleNormal	Defines normal text (no italics).

Example:

/* font style */
.natFontStyleItalic {font-style:italic;}
.natFontStyleNormal {font-style:normal;}

Defining Bold Text

The following elements are available:

Element Name	Description
.natFontWeightBold	Defines bold text.
.natFontWeightNormal	Defines normal text (not bold).

/* Font weight */
.natFontWeightBold {font-weight:bolder;}
.natFontWeightNormal {font-weight:normal;}

When you define bold text ({font-weight:bolder;}) for the default font Courier New, your text always has the same width as with normal text ({font-weight:normal;}).

However, when you define bold text for Courier or Lucida Console, the bold text will be wider than the normal text and your output may thus appear deformed. It is therefore recommended that you switch off bold text for Courier and Lucida Console:

.natFontWeightBold {font-weight:normal;}

Defining Different Styles for Output Fields

The following elements are available:

Element Name	Description
.FieldVariableBased	Defines the style for output fields that are based on a variable.
.FieldLiteralBased	Defines the style for output fields that are based on a literal.

Example:

.FieldVariableBased {
   /* font-style:italic; */
}

.FieldLiteralBased {
    /* font-style:normal; */
}

Modifying the Natural Windows

The following elements are available:

Element Name	Description
.naturalwindow	Controls the rendering of the Natural windows.
.wintitle	Controls the rendering of the titles of the Natural windows.

Example:

.naturalwindow {
    border-style: solid; 
    border-width: 1px; 
    border-color: white;
    background-color: black;
}

.wintitle {
    left: 0px;
    top: 1px;
    height: 17px;
    width: 100%;
    color: black;
    font-size: 100%;
    font-weight: bold;
    background-color: white;
    text-align: center;
    font-family: Verdana;
    border-bottom-style: solid;
    border-bottom-width: 2px;
}

Modifying the Message Line

The rendering of the message line is controlled by the .MessageLine element.

Example:

.MessageLine {
    color: blue;
}

Modifying the Background Color

The background color is defined in the body element.

Example:

body {
      background-color: #F3F5F0; 
      font-family: Lucida Console;
}

Modifying the Color Attributes

You can define different colors for all Natural color attributes. These are:

Red
Green
Blue
Yellow
White
Black
Pink
Turquoise
Transparent

You can define these color attributes for input fields and output fields, and for normal output and reverse video.

The following examples show how to define the color attribute "Red".

Define the color for a normal output field:

.natOutputRed {color: darkred;}

Define the foreground and background colors for an output field with reverse video:

.reverseOutputRed {background-color: darkred; color:#F3F5F0;}

Define the color for a normal input field:

.natInputRed {color: darkred;}

Define the foreground and background colors for an input field with reverse video:

.reverseInputRed {background-color: darkred; color:#F3F5F0;}

Modifying the Style of the PF Key Buttons

The following elements are available:

Element Name	Description
.PFButton	Controls the style for normal rendering.
.PFButton:hover	Controls the style that is used when the mouse hovers over a PF key button.

Example:

.PFButton { 
    text-align: center; 
    width: 90px;
    border-style: ridge; 
    border-width: 3px; 
    padding: 2px; 
    text-decoration: none; 
    font-family: Verdana;
    font-size: 12px;
    height: 22px;
}

.PFButton:hover { 
    color: #FFFF00; 
    background-color: #222222; 
}

JavaScript and XSLT Files

In addition to the CSS files described above, the Natural Web I/O Interface client uses XSLT files with specific names for the conversion of the Natural Web I/O Interface screens from the internal XML format to HTML. The following elements are affected:

• Input text is placed into the HTML element <input>.

• Output text is placed into the HTML element <input> (with attribute readonly="readonly").

• A message line is placed into the HTML element <span>.

• PF keys are embedded in an XML island and then rendered with JavaScript.

• Window elements are embedded in an XML island and then rendered with JavaScript.

The name of the default XSLT file is:

• transuni.xsl for all supported browsers.

The default XSLT file can be found in the following directory:

<installdir>/natuniweb/web-INF

The XSLT file is only read once when the server is started.

You can copy your own JavaScript file into the scripts directory which can be found in the <installdir>/natuniweb directory.

In this case, the file must have the following name:

• usernatunicscript.js for all supported browsers.

If this user file can be found when the server is started, it is read additionally to the JavaScript file natunicscript.js. Define your new functionality in this JavaScript file. Add the required XSL elements to the file usertransuni.xsl to call the new functions. If this user file can be found when the server is started, it is read instead of the default XSLT file.

When you make changes to this file, you have to restart the server so that your changes become effective.