Applet Example 7
This examples
demonstrates how the applet is able to interact with javascript
functions within the current page. In the graph below clicking
on the Data Points will execute a javascript function which
will either show or hide a table of data for that series.
|
Product X |
January |
$
3,162 |
February |
$
2,516 |
March |
$
2,945 |
April |
$
3,980 |
May |
$
5,750 |
June |
$
6,230 |
July |
$
4,765 |
August |
$
5,636 |
September |
$
5,120 |
October |
$
4,365 |
November |
$
5,789 |
December |
$
5,623 |
|
Product Y |
January |
$
6,840 |
February |
$
6,704 |
March |
$
3,945 |
April |
$
6,780 |
May |
$
4,750 |
June |
$
2,230 |
July |
$
1,065 |
August |
$
636 |
September |
$
520 |
October |
$
250 |
|
Product Z |
April |
$
253 |
May |
$
682 |
June |
$
989 |
July |
$
1,920 |
August |
$
1,240 |
September |
$
2,240 |
October |
$
1,450 |
November |
$
2,808 |
December |
$
2,050 |
|
and here
is the HTML code for the applet
(note that 'mayscript' has been added to the APPLET tag ),
<applet code="AreaGraphApplet.class"
archive="AreaGraph.jar" width="460"
height="440" mayscript>
<!-- Start Up
Parameters -->
<PARAM name="LOADINGMESSAGE" value="Line
Graph Loading - Please Wait."> <!-- Message to
be displayed on Startup -->
<PARAM name="STEXTCOLOR" value="0,0,100">
<!-- Message Text Color-->
<PARAM name="STARTUPCOLOR" value="255,255,255">
<!-- Applet Background color -->
<!-- Data files
-->
<PARAM NAME="chartproperties" VALUE="areapropsjs.txt">
<PARAM NAME="chartdata" VALUE="areadatajs.txt">
</applet>
The
configuration parameters are taken from the text file areapropsjs.txt
( click here to view )
and the graph data is read from the text file areadatajs.txt
( click here to view )
If
you "right click" and view source of this page you
will see that we have the following javascript function within
the page which is able to act upon the three tables, "c1",
"c2" and "c3".
<SCRIPT
LANGUAGE="JavaScript">
var table='c1';
function combo(table) {
if (table=='c1')
{
if (document.all.c1.style.visibility=="hidden")
{
document.all.c1.style.visibility="visible";
}
else {document.all.c1.style.visibility="hidden";}
}
if (table=='c2')
{
if (document.all.c2.style.visibility=="hidden")
{
document.all.c2.style.visibility="visible";
}
else {document.all.c2.style.visibility="hidden";}
}
if (table=='c3')
{
if (document.all.c3.style.visibility=="hidden")
{
document.all.c3.style.visibility="visible";
}
else {document.all.c3.style.visibility="hidden";}
}
}
</script>
In
the areadatajs.txt ( click here to
view ) file you will see that each of our data elements
has the word "javascript" entered in the target
field and the javascript function name with the relevant value
entered in the URL field.
Note:
If you are using the evaluation version then in the applet
a pop-up window will appear upon the startup and an evaluation
message will be incorporated by the servlet. Both these
features have been removed from the licensed version. Licensing
information can be found at http://www.jpowered.com/graph_chart/index.htm
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