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On second thoughts, this might not be so bad if I knew what I was doing.
Would it be fair to say that I could embed an Applet tag within a or an and then have complete flexibility in positioning, size, style of whatever the applet paints "within" the browser? I'm guessing <object> attributes such as height and width can be manipulated with DOM like any other; is that right? This is beginning to sound pretty sexy! <P> I don't know enough about graphics and how paint() works, and I'm struggling to disassociate the Applet code from its html tag presence; Does anyone have a small example of this in progress? (Yes, I will do more RTFMing :-) <P> What if two tags call the same applet; does init() get called twice? Two instances of the applet of just one? two pannels,frames,canvasses and just one applet? <P> What if there are three Applets active in the frameset; How can they invoke each others methods without having been aware of each other at compile-time? Given the (at least by default) single-threading of browser-applet interaction, can I share the one socket connection between the three? Is there global memory/references? <P> I've got a JavaScript DOM (getElementById) identifier that lets JS lnow when I'm calling a given applet's methods but surely this handle/object-instance would be of little use in telling applet[2] about the existance of applet[1] (and its methods)? <P> I think this is getting into that dynamic activation stuff that you told me about (and I didn't understand :-) the first time - Sorry. An example would really, really help here though. <P> Let's start small - "An example of an Applet painting and Image in a browser" any takers? websites? <P> Cheers Richard Maher <P> "Richard Maher" <maher_rj@hotspamnotmail.com> wrote in message news:eu1qmg$1mk$1@news-01.bur.connect.com.au... <BR><FONT color=gray>> Hi Arne,</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> Thanks for the reply.</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> "Arne Vajhøj" <arne@vajhoej.dk> wrote in message</FONT> <BR><FONT color=gray>> news:460323df$0$90268$14726298@news.sunsite.dk...</FONT> <BR><FONT color=gray>> > Or you can use an applet that retrieves the images via socket</FONT> <BR><FONT color=gray>> > and displays it within the applet.</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> This is very important to me. Are you really saying "can" or "as far as I</FONT> <BR><FONT color=gray>> know you used to be able to"? Are you referring to Microsoft's</FONT> <BR><FONT color=gray>> implementation of Data Source Objects in Internet Explorer or something</FONT> <BR><FONT color=gray>> else? The reason that I am so sceptical is that I asked the following</FONT> <BR><FONT color=gray>> question xposted here and c.l.javascript a while back: -</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> ----- Original Message ----- </FONT> <BR><FONT color=gray>> From: "Richard Maher" <maher_rj@hotspamnotmail.com></FONT> <BR><FONT color=gray>> Newsgroups: comp.lang.java.programmer,comp.lang.javascript</FONT> <BR><FONT color=gray>> Sent: Saturday, March 10, 2007 9:24 AM</FONT> <BR><FONT color=gray>> Subject: Applet as DSO in Browser example? MSIE only?</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> > Hi,</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Recently on the web I came across documentation discussing Data Source</FONT> <BR><FONT color=gray>> > Objects (DSO) in relation to browser and html functionality (in</FONT> particular <BR><FONT color=gray>> > the ability to declare a Java applet as a data source that can be used</FONT> <BR><FONT color=gray>> with</FONT> <BR><FONT color=gray>> > any or the HTML tags that take the src="" attribute). I find it</FONT> <BR><FONT color=gray>> interesting</FONT> <BR><FONT color=gray>> > and potentially *very* useful and would like to know more, so if anyone</FONT> <BR><FONT color=gray>> can</FONT> <BR><FONT color=gray>> > answer any of the following questions that would be great: -</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > 1) Do you have an example of an Applet functioning as an applet to</FONT> <BR><FONT color=gray>> something</FONT> <BR><FONT color=gray>> > like a <Table> that I can see?</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > 2) Is this a MicrosoftIE-only feature? I can't find it in other html tag</FONT> <BR><FONT color=gray>> > reference sites. (I'm using w3schools as a sort of yardstick; is that</FONT> less <BR><FONT color=gray>> > than optimal?) What do other browsers do? Is Microsoft deprecating this</FONT> <BR><FONT color=gray>> > along with other Java stuff?</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > 3) I've searched in c.l.j.p/c.l.javascript and the only references to</FONT> DSOs <BR><FONT color=gray>> > appear to be server based (or data sources other than Applet) I'm</FONT> guessing <BR><FONT color=gray>> > they're entirely different beasts; is that correct?</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > 4) Anyone ever passed a BufferedImage over to Javascript for display on</FONT> a <BR><FONT color=gray>> > web page? (I know it'd be single threaded and all those little .GIFs and</FONT> <BR><FONT color=gray>> > .JPEGs are designed for parallel http webservers, but think of a blob in</FONT> a <BR><FONT color=gray>> > database that has an employee photo of geological survey or something. .</FONT> <BR><FONT color=gray>> .)</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Thanks for any help!</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Regards Richard Maher</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > PS. I am already passing result set <options>s back to a <select> list</FONT> <BR><FONT color=gray>> quite</FONT> <BR><FONT color=gray>> > happily; it's the tighter integration between the html tags and my</FONT> socket <BR><FONT color=gray>> > that I'm striving for here.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > One of the places I've been looking: -</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>></FONT> <A target='_blank' HREF='http://msdn.microsoft.com/library/default.asp?url=/workshop/author/databind/datasources.asp'>http://msdn.microsoft.com/library/default.asp?url=/workshop/author/databind/datasources.asp</A> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> . . .and the only answer I got was: -</FONT> <BR><FONT color=gray>> [</FONT> <BR><FONT color=gray>> The reference to Java applet on</FONT> <BR><FONT color=gray>> MSDN is a bit mysterious to me. I guess for IE 4/5 Microsoft allowed</FONT> <BR><FONT color=gray>> to use their JVM for bridging to the needed ActiveX, so people could</FONT> <BR><FONT color=gray>> use either <object> or <applet> depending on personal preferences. In</FONT> <BR><FONT color=gray>> either case it is definitely in relation to the Microsoft own JVM</FONT> <BR><FONT color=gray>> which is not provided any more. It has nothing to do with Sun plugin.</FONT> <BR><FONT color=gray>> ]</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> It would be great if you could still do this! Do you (or anyone) have an</FONT> <BR><FONT color=gray>> example?</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> Hold on, I've just re-read what your post actually says and not what I</FONT> <BR><FONT color=gray>> wanted it to say "displays it within the applet." :-( I assume that means</FONT> <BR><FONT color=gray>> as opposed to displaying it within the browser?</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> Cheers Richard Maher</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>> "Arne Vajhøj" <arne@vajhoej.dk> wrote in message</FONT> <BR><FONT color=gray>> news:460323df$0$90268$14726298@news.sunsite.dk...</FONT> <BR><FONT color=gray>> > Richard Maher wrote:</FONT> <BR><FONT color=gray>> > > But before launching into Swing there is one niggle or possible</FONT> <BR><FONT color=gray>> > > spanner-in-the-works I'd like to quiz you about, and that is</FONT> "footprint" <BR><FONT color=gray>> > > both in terms of memory and bandwidth of a Swing evoking class. In my</FONT> <BR><FONT color=gray>> case</FONT> <BR><FONT color=gray>> > > I'm using an Applet that does little more user interaction than pop-up</FONT> a <BR><FONT color=gray>> > > couple of dialog boxes before handing control over to the web browser</FONT> <BR><FONT color=gray>> and</FONT> <BR><FONT color=gray>> > > html, and find AWT to be a stream-lined gazelle-like creature (albeit</FONT> <BR><FONT color=gray>> > > three-legged) and fear Swing could be more like an elephant. Are my</FONT> <BR><FONT color=gray>> fears</FONT> <BR><FONT color=gray>> > > ill-founded? Are all the class libraries in the JVM anyway so don't</FONT> have <BR><FONT color=gray>> to</FONT> <BR><FONT color=gray>> > > be sent over the network? Will my Class and JAR files be roughly the</FONT> <BR><FONT color=gray>> same</FONT> <BR><FONT color=gray>> > > size? Is relative resource consumption (or body mass index) an issue?</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > The Swing classes has been part of Java since version 1.2.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Your code may actually shrink a little bit in size because</FONT> <BR><FONT color=gray>> > you may replace some of your code with builtin Swing functionality.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Swing apps do tend to use some memory. But would not consider it</FONT> <BR><FONT color=gray>> > a problem on any PC that is not completely outdated.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > > PPS. If I was holding a series of say employee photographs/images as</FONT> <BR><FONT color=gray>> blobs</FONT> <BR><FONT color=gray>> > > in a database, can anyone tell me how I would get one of them up into</FONT> a <BR><FONT color=gray>> > > web-browser without first having to export it to a .jpeg/.bmp/.gif</FONT> <BR><FONT color=gray>> file? I</FONT> <BR><FONT color=gray>> > > must have missed something? I know http servers/browsers are optimized</FONT> <BR><FONT color=gray>> to</FONT> <BR><FONT color=gray>> > > have seperate threads for uploading images but nonetheless, what's the</FONT> <BR><FONT color=gray>> > > alternative? Can I pass an BufferedImage back from an applet to</FONT> <BR><FONT color=gray>> Javascript?</FONT> <BR><FONT color=gray>> > > (And then what would it do with it without a SRC="#something"?)</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > You can do a IMG tag with SRC pointing to a server side script that</FONT> <BR><FONT color=gray>> > sends the image from the database to the browser with the correct</FONT> <BR><FONT color=gray>> > content type.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Or you can use an applet that retrieves the images via socket</FONT> <BR><FONT color=gray>> > and displays it within the applet.</FONT> <BR><FONT color=gray>> ></FONT> <BR><FONT color=gray>> > Arne</FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>></FONT> <BR><FONT color=gray>></FONT> <P> <P> </TD></TR> </TABLE> </TD></TR> <TR><TD BGCOLOR="#ffffff" align=center><FONT color=#cccccc size=-2> Page2Go2.com is not responsible for content of this message. </TD></TR></TABLE> </CENTER> <P> <HR color="#CCCCCC" size=1> <CENTER> <script type="text/javascript"><!-- google_ad_client = "pub-9167933909297982"; google_alternate_ad_url = "http://www.page2go2.com/galt2.html"; google_ad_width = 300; google_ad_height = 250; google_ad_format = "300x250_as"; google_ad_type = "text_image"; google_ad_channel ="8062000500"; google_color_border = "FFFFFF"; google_color_bg = "FFFFFF"; google_color_link = "003399"; google_color_url = "006699"; google_color_text = "000080"; //--></script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> </CENTER> </pre></TD><TD width=200 valign=top bgcolor=#ffffff><script type="text/javascript"><!-- google_ad_client = "pub-9167933909297982"; google_alternate_ad_url = "http://www.page2go2.com/galt.html"; google_ad_width = 160; google_ad_height = 600; google_ad_format = "160x600_as"; google_ad_type = "text_image"; google_ad_channel ="8062000500"; google_color_border = "FFFFFF"; google_color_bg = "FFFFFF"; google_color_link = "000080"; google_color_url = "006699"; google_color_text = "000000"; //--></script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> </TD></TR></TABLE> <script src="http://www.google-analytics.com/urchin.js" type="text/javascript"> </script> <script type="text/javascript"> _uacct = "UA-1132194-29"; urchinTracker(); </script> </body></html>