Vertical Scroller Type Writer Applet Documentation

Vertical Scroller Type Writer Applet is a small and fast loading applet that displays vertical scrolling text being written as in a type writer. There is optional sound support when the mouse is over the applet and support for a background image. When the user clicks on the applet a URL can appear in a new page or in a frame.

• VScrollerTypeWriter.class (8,7k)
• message.txt (1k)
• Type.au (2k)
• bg2.jpg (4k)

• FileName is the name of the file that contains the text message. It must be in the same directory with the class file
• WrapAtBorders "Yes" or "No". When the value is "Yes" applet will ignore new line characters and will treat the whole text as a big String, then it will automatically wrap it at borders.Default is No.
• Sound "Yes" or "No". Sound is played only when the mouse is over the applet.
• Image the name of the image. It must be in the same directory with the class. When you use an image, applet width and height must be those of the image. if you don't use any image you must omit this parameter. Don't write <param name="Image" value="">.Omit this line..
• BorderTop: Border values must be used only when there is an image and you want the text to appear in an area less than the full image area. Default values are zero Border top is the value in pixels from the top border of the image
• BorderBottom: Border boottom is the value in pixels from the bottom border of the image
• BorderLeft: Border left is the value in pixels from the left side of the image
• BorderRight: Border right is the value in pixels from the right border of the image
• Delay is the number of milliseconds between the stroke of every letter
• Author and Email do not affect your applet and must not be changed

• URL is the URL you want to appear when you click the applet.
• BGCOLOR is the background color of the applet. All colors are defined as triples of R,G,B values where 0<=R,G,B<=255. All values zero "0,0,0" indicate black, all values 255 indicate white. Bgcolor is drawn only when don't define an image.
• TEXTCOLOR is the color of text
• BORDERCOLOR is the border color. Bordercolor is drawn only when don't define an image.
• FONTSIZE is the font size
• FONTNAME is the name of the font. If you don't know what fonts your java support, use my Fonts applet which is provided freely. Common fonts are: "TimesRoman", "Arial" and "Helvetica".
• FONTSTYLE: the style can be "PLAIN" or "BOLD" or "ITALIC", or "BOLDandITALIC". Default is "BOLD".This means that if you don't specify this parameter, or if you specify it wrong, fontstyle will be "BOLD"
• DELAY is the number of milliseconds to pause when the whole message has appeared.
• TARGET can have any of the values "_self", "_parent", "_top", "_blank" or the name of the frame you want the URL to appear.Default is "_blank".The meaning of each target is explained below:
  • "_self" : Show in the window and frame that contain the applet.
  • "_parent" " Show in the applet's parent frame. If the applet's frame has no parent frame, acts the same as "_self".
  • "_top" : Show in the top-level frame of the applet's window. If the applet's frame is the top-level frame, acts the same as "_self".
  • "_blank": Show in a new, unnamed top-level window.
  • name : Show in the frame or window named name. If a target named name does not already exist, a new top-level window with the specified name is created, and the document is shown there.

Some things to note:

• Before you define or change the values you must write <new>
• These values will apply for the text that follows. This text will take the place of the previous text.
• Case does't matter in the left side of the equal sign.That is fontsize is equivalent to Fontsize, FontSize, or FONTSIZE.
• Case doesn't matter in the right side of the equal sign, except for Target and Font Name. That is "target=frame1" is different from "target=Frame1" and "fontname=TimesRoman" is different from "fontname=TIMESROMAN"
• The order that you define them doesn't play any role.
• Each parameter must be in a different line.
• You don't need to mention all the values again, but only those you want to change.

Each applet is characterised by a pair of tags: "<applet>" and "</applet>". The applet must be contained in the body section of the html document. The applet tag must at least specify the "CODE", "WIDTH", and "HEIGHT" modifieres. In addition it can have other modifiers like "CODEBASE" and parameters. For example

<APPLET CODE="MyApplet.class" CODEBASE="." WIDTH="100" HEIGHT="100">

<PARAM NAME="FileName" VALUE="message.txt">

Your browser doesn't support Java or Java is not enabled.

</APPLET>

• CODE tells the browser which is the main class (An applet can comprise many class files)

• CODEBASE tells the browser in which directory are the class files. In this example we have a dot, which means the current directory. We could also have stated CODEBASE="classes/" which means that the class files are located in a directory called classes relative to the directory of your html document. The URL of your html document is called documentbase. If CODEBASE="../classes/" this means that the class files are in a directory named classes relative to the parent directory of your html document.If CODEBASE and DOCUMENTBASE are the same, that is the class files exist in the same directory with the html doucument, then CODEBASE can be omitted.

• WIDTH and HEIGHT specify in Pixels the amount of space the browser will devote to the applet.

• PARAM, short for parameters, is used to pass information to applets. This information can be the text you want to appear in the applet, the URL links, the colors etc. Each parameter has a name and a value. Names are not case sensitive but Values are. This means that "FileName" is the same as "FILENAME" but "message.txt" is Not the same as "MESSAGE.txt". It is always a good practise and some times necessary to include the name and value of parameters in quotes

• The line "Your browser doesn't support Java or Java is not enabled." will appear in the place of the applet if java is not enabled or the browser doesn't support Java.

Other things to note: Class names are case sensitive. "MyApplet.class" is different from "MyAPPLET.class". Class files are binary files and should be uploaded in binary mode. The applet tags can be written in lower or uppercase characters. CODE is the same as code or Code.

The best way of learning how applets work is to see at the examples and play with the values of parameters.

This applet works with all major browsers. It has been tested with Netscape Navigator 3.04, Netscape Communicator 4.04 and Internet Explorer 4.

The ability to have multiple parts of text with different URLs and font styles