Question

reach an html anchor without reloading

Asked by: tomavio

ok, here's the problem :

my applet is a graphic dynamically built, receiving its parameters from an asp page, kmresults.asp. this applet has areas that are reacting on "mousedown" to move inside the asp page, using html anchors (<a name="myanchor">).

below is the function reacting to the mouse click:

public boolean mouseDown(Event evt, int x, int y)
{
if (MyArea.contains(x,y)) {url= getDocumentBase()+"kmresults.asp?ID=" +CompID+ "#Lstrat";}
     
try{theUrl= new URL(url);}
catch(MalformedURLException e){System.out.println("BadURL:"+url);}
getAppletContext().showDocument(theUrl);
System.out.println(url);
return true;
}

actually, it's working fine, but i don't think it is a very nice solution, because this cause the reload the all page (with some code querying a db..etc...). And what i want actually is just to move inside my page, not to reload it... if u have a idea or solution, thx in advance.

note : i am using jdk1.2.2

just a tiny extra question.. in case... do u know what's the event name in java corresponding to the javascript "onMouseOver" ?

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Asked On
2001-02-08 at 08:42:06ID20074649
Tags

anchor

,

reload

,

applet

,

without

Topic

Java Programming Language

Participating Experts
3
Points
300
Comments
4

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Answers

 

by: sgomsPosted on 2001-02-08 at 08:58:38ID: 5824598

The java event that corresponds to 'onMouseOver' would be
public void mouseEntered(MouseEvent e){} under MouseListener.

 

by: sgomsPosted on 2001-02-08 at 09:57:37ID: 5824791

You can use Netscape's LiveConnect
(http://developer.netscape.com/docs/manuals/js/client/jsguide/lc.htm)

to call a javascript from your applet.

with this you can change the url of your doc and this moves down the doc without reloading the page.

Here is the applet code:

package programs;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import netscape.javascript.*;

public class CallJavaScriptApplet extends Applet {

  Applet _applet=null;
  //Initialize the applet
  public void init() {
     System.out.println("Applet Inited");
     _applet=this;
     final Label _label=new Label("Move over me");
     _label.setBackground(Color.gray);
     _label.setForeground(Color.white);
     setLayout(new FlowLayout());
     add(_label);
     _label.addMouseListener(new MouseAdapter(){
        public void mouseEntered(MouseEvent e){
           _label.setBackground(Color.black);
           _label.repaint();
        }
        public void mouseExited(MouseEvent e){
           _label.setBackground(Color.gray);
           _label.repaint();
        }
        public void mouseClicked(MouseEvent e){
            JSObject win = JSObject.getWindow(_applet);
            win.eval("document.URL=\""+_applet.getDocumentBase()+"#end\"");
        }
     });

  }
  public void start(){
     System.out.println("Applet Started");
  }
  public void stop(){
     System.out.println("Applet Stopped");
  }


}

Here is the HTML Code:
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<TITLE>
HTML Test Page
</TITLE>
</HEAD>
<BODY>
programs.CallJavaScriptApplet will appear below in a Java enabled browser.<BR>
<APPLET
  CODEBASE = "."
  CODE     = "programs.CallJavaScriptApplet.class"
  NAME     = "TestApplet"
  WIDTH    = 400
  HEIGHT   = 150
  HSPACE   = 0
  VSPACE   = 0
  ALIGN    = middle
  MAYSCRIPT
>
</APPLET>
<p><A HREF="javascript:history.go(0)">Reload Now</A>

<p>Lorem ipsum dolor' is the first part of a nonsense paragraph sometimes used to demonstrate a font. It has been well established that if you write anything as a sample, people will spend more time reading the copy than looking at the font. The ``gibberish'' below is sufficiently like ordinary text to demonstrate a font but doesn't distract the reader. Hopefully.

<p>Rick Pali submits the following from Before and After Magazine, Volume 4 Number 2.:

<p>[quote]

<p>After telling everyone that Lorem ipsum, the nonsensical text that comes with PageMaker, only looks like Latin but actually says nothing, I heard from Richard McClintock, publication director at the Hampden-Sydney College in Virginia, who had enlightening news:

<p>"Lorem ipsum is latin, slightly jumbled, the remnants of a passage from Cicero's _de Finibus_ 1.10.32, which begins 'Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit...' [There is no one who loves pain itself, who seeks after it and wants to have it, simply because it is pain.]. [de Finibus Bonorum et Malorum, written in 45 BC, is a treatise on the theory of ethics very popular in the Renaisance.]

<p>"What I find remarkable is that this text has been the industry's standard dummy text ever since some printed in the 1500s took a galley of type and scambled it to make a type specemin book; it has survived not only four centuries of letter-by-letter resetting but even the leap into electronic typesetting, essentially unchanged except for an occational 'ing' or 'y' thrown in. It's ironic that when the then-understood Latin was scrambled, it became as incomprehensible as Greek; the phrase 'it's Greek to me' and 'greeking' have common semantic roots!"

<p>[unquote]

<p>
One Example of Lorem Ipsum Dolor
<p>Lorem ipsum dolor sit amet, consectetaur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum Et harumd und lookum like Greek to me, dereud facilis est er expedit distinct. Nam liber te conscient to factor tum poen legum odioque civiuda. Et tam neque pecun modut est neque nonor et imper ned libidig met, consectetur adipiscing elit, sed ut labore et dolore magna aliquam makes one wonder who would ever read this stuff? Bis nostrud exercitation ullam mmodo consequet. Duis aute in voluptate velit esse cillum dolore eu fugiat nulla pariatur. At vver eos et accusam dignissum qui blandit est praesent luptatum delenit aigue excepteur sint occae. Et harumd dereud facilis est er expedit distinct. Nam libe soluta nobis eligent optio est congue nihil impedit doming id Lorem ipsum dolor sit amet, consectetur adipiscing elit, set eiusmod tempor incidunt et labore et dolore magna aliquam. Ut enim ad minim veniam, quis nostrud exerc. Irure dolor in reprehend incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse molestaie cillum. Tia non ob ea soluad incommod quae egen ium improb fugiend. Officia deserunt mollit anim id est laborum Et harumd dereud facilis est er expedit distinct. Nam liber te conscient to factor tum poen legum odioque civiuda et tam. Neque pecun modut est neque nonor et imper ned libidig met, consectetur adipiscing
<a name="end"></a>


</BODY>
</HTML>


To test whether the page gets reloaded I have System.out's in the applet's init, start and stop methods. unlike the reload fucntion, when you move down the page the applet is neither stopped, started or inited.

hope this helps,
-sgoms

 

by: andyclapPosted on 2001-02-08 at 20:16:04ID: 5826308

just an aside
document.URL="..."
Isn't cross platform, try
location.href="..."

 

by: ExceterPosted on 2002-12-24 at 21:46:10ID: 7630557

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

- points to sgoms

Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

Exceter
Cleanup Volunteer

20120131-EE-VQP-002

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