JavaScript DHTML/Development/Applet Jar

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Accessing Applets from within JavaScript

   <source lang="html4strict">

//java source file import java.applet.*; import java.awt.*; public class FancyText extends Applet { 

String text="I like Java!";

public void paint(Graphics g) {
 g.drawString(text,30,30);
}

public void setText(String s) {
 text=s;
 repaint();
}

} //Loading and Accessing an Applet <head> <TITLE>Accessing Applets</TITLE> <SCRIPT LANGUAGE="JavaScript"></SCRIPT> </HEAD> <BODY onLoad="accessApplet()"> <APPLET CODE="FancyText.class" NAME="fancyText" 

WIDTH=450 HEIGHT=150>

[The FancyText Applet] </APPLET> 


      </source>


A More Fully Scripted Clock

   <source lang="html4strict">

/* JavaScript Bible, Fourth Edition by Danny Goodman John Wiley & Sons CopyRight 2001

  • /

<HTML> <HEAD> <TITLE>Clock with Lots o" Widgets</TITLE> <SCRIPT LANGUAGE="JavaScript1.1"> function setTimeZone(popup) { 

   var choice = popup.options[popup.selectedIndex].value
   document.clock2.setTimeZone(choice)

} function setColor(form) { 

   var bg = form.backgroundColor.options[form.backgroundColor.selectedIndex].value
   var fg = form.foregroundColor.options[form.foregroundColor.selectedIndex].value
   document.clock2.setColor(bg, fg)

} function setFont(form) { 

   var fontName = form.theFont.options[form.theFont.selectedIndex].value
   var fontStyle = form.theStyle.options[form.theStyle.selectedIndex].value
   var fontSize = form.theSize.options[form.theSize.selectedIndex].value
   document.clock2.setFont(fontName, fontStyle, fontSize)

} function getAppletInfo(form) { 

   form.details.value = document.clock2.getInfo()

} function showSource() { 

   var newWindow = window.open("ScriptableClock.java","", 
   "WIDTH=450,HEIGHT=300,RESIZABLE,SCROLLBARS")

} </SCRIPT> </HEAD> <BODY> <APPLET CODE="ScriptableClock.class" NAME="clock2" WIDTH=500 HEIGHT=45> <PARAM NAME=bgColor VALUE="Black"> <PARAM NAME=fgColor VALUE="Red"> </APPLET>

<FORM NAME="widgets2"> Select Time Zone: <SELECT NAME="zone" onChange="setTimeZone(this)"> <OPTION SELECTED VALUE="Locale">Local Time <OPTION VALUE="GMT">Greenwich Mean Time </SELECT><P> Select Background Color: <SELECT NAME="backgroundColor" onChange="setColor(this.form)"> <OPTION VALUE="White">White <OPTION SELECTED VALUE="Black">Black <OPTION VALUE="Red">Red <OPTION VALUE="Green">Green <OPTION VALUE="Blue">Blue <OPTION VALUE="Yellow">Yellow </SELECT> Select Color Text Color: <SELECT NAME="foregroundColor" onChange="setColor(this.form)"> <OPTION VALUE="White">White <OPTION VALUE="Black">Black <OPTION SELECTED VALUE="Red">Red <OPTION VALUE="Green">Green <OPTION VALUE="Blue">Blue <OPTION VALUE="Yellow">Yellow </SELECT><P> Select Font: <SELECT NAME="theFont" onChange="setFont(this.form)"> <OPTION SELECTED VALUE="TimesRoman">Times Roman <OPTION VALUE="Helvetica">Helvetica <OPTION VALUE="Courier">Courier <OPTION VALUE="Arial">Arial </SELECT>
Select Font Style: <SELECT NAME="theStyle" onChange="setFont(this.form)"> <OPTION SELECTED VALUE="Plain">Plain <OPTION VALUE="Bold">Bold <OPTION VALUE="Italic">Italic </SELECT>
Select Font Size: <SELECT NAME="theSize" onChange="setFont(this.form)"> <OPTION VALUE="12">12 <OPTION VALUE="18">18 <OPTION SELECTED VALUE="24">24 <OPTION VALUE="30">30 </SELECT><P>

<INPUT TYPE="button" NAME="getInfo" VALUE="Applet Info..." onClick="getAppletInfo(this.form)"> <P> <TEXTAREA NAME="details" ROWS=11 COLS=70></TEXTAREA> </FORM>

</BODY> </HTML> 


      </source>


Basic Signed Script Structure

   <source lang="html4strict">

/* JavaScript Bible, Fourth Edition by Danny Goodman John Wiley & Sons CopyRight 2001

  • /

<HTML> <HEAD> <TITLE>Signed Scripts Testing</TITLE> <SCRIPT LANGUAGE="JavaScript" ARCHIVE="myArchive.jar" SRC="access.js"></SCRIPT> <SCRIPT LANGUAGE="JavaScript" ID="1"> function fetchFile(form) { 

  form.output.value = getFile()

} function newRaisedWindow() { 

  // statements for this function

} </SCRIPT> </HEAD> <BODY> A Source Code Example Only <FORM> <TEXTAREA NAME="output" COLS=60 ROWS=10 WRAP="virtual"></TEXTAREA>
<INPUT TYPE="button" VALUE="Read File" onClick="this.form.output.value = ""; fetchFile(this.form);" ID="2">
<TEXTAREA NAME="input" COLS=60 ROWS=10 WRAP="virtual"> </TEXTAREA>
<INPUT TYPE="button" VALUE="Save File" onClick="setFile(this.form.input.value);" ID="3"><P> <INPUT TYPE="button" VALUE="New Window..." onClick="newRaisedWindow();" ID="4"> </FORM> </BODY> </HTML> 

      </source>


Calling Java Methods

   <source lang="html4strict">

<HTML> <HEAD> <TITLE>Calling Java Methods</TITLE> </HEAD> <BODY> <P>This script writes the text, Hello World!

to the Java console window.

<SCRIPT LANGUAGE="JavaScript"></SCRIPT> </BODY> </HTML> 

      </source>


Stopping and Starting an Applet

   <source lang="html4strict">

<HTML> <HEAD> <TITLE>A Script That Could Stop a Clock</TITLE> <SCRIPT LANGUAGE="JavaScript"> function pauseClock() { 

   document.clock1.stop()

} function restartClock() { 

   document.clock1.start()

} </SCRIPT> <BODY>

Simple control over an applet

<APPLET CODE="ScriptableClock.class" NAME="clock1" WIDTH=500 HEIGHT=45> <PARAM NAME=bgColor VALUE="Green"> <PARAM NAME=fgColor VALUE="Blue"> </APPLET>

<FORM NAME="widgets1"> <INPUT TYPE="button" VALUE="Pause Clock" onClick="pauseClock()"> <INPUT TYPE="button" VALUE="Restart Clock" onClick="restartClock()"> </FORM> </BODY> </HTML> </source>

Using JavaScript in an Applet

   <source lang="html4strict">

/* Mastering JavaScript, Premium Edition by James Jaworski ISBN:078212819X Publisher Sybex CopyRight 2001

  • /

<title>Accessing JavaScript from an applet</TITLE> <form NAME="textForm"> <P>Enter some text and then click Display Text:

<INPUT TYPE="text" NAME="textField" SIZE="20">

</FORM> <APPLET CODE="ReadForm.class" WIDTH=400 HEIGHT=100 

NAME="readApp" MAYSCRIPT>

[The ReadForm Applet] </APPLET>

//Reading a JavaScript Form (ReadForm.java)

import java.applet.*; import java.awt.*; import java.awt.event.*; import netscape.javascript.JSObject; import netscape.javascript.JSException; public class ReadForm extends Applet { 

String text="Enter some text for me to display!";
Font font = new Font("TimesRoman",Font.BOLD+Font.ITALIC,24);
JSObject win, doc, form, textField;
public void init() {
 win = JSObject.getWindow(this);
 doc = (JSObject) win.getMember("document");
 form = (JSObject) doc.getMember("textForm");
 textField = (JSObject) form.getMember("textField");
 setLayout(new BorderLayout());
 Panel buttons = new Panel();
 Button displayTextButton = new Button("Display Text");
 displayTextButton.addActionListener(new ButtonEventHandler());
 buttons.add(displayTextButton);
 add("South",buttons);
}
public void paint(Graphics g) {
 g.setFont(font);
 g.drawString(text,30,30);
}
class ButtonEventHandler implements ActionListener {
 public void actionPerformed(ActionEvent e){
  String s = e.getActionCommand();
  if("Display Text".equals(s)) {
   text= (String) textField.getMember("value");
   win.eval("alert(\"This alert comes from Java!\")");
   repaint();
  }
 }
}

} 


      </source>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Development/Applet_Jar&oldid=1863»