convert applet to image !!!!!!!!!

> i mention i want the server to load every changes

> that affect by clients

I still don't understand what you mean by this.

> iam googling the problem and i saw the solution is to

> get an image for every change and send it through

> client socket .

I'd really look at sending changes in the data model, not doing a screen dump of the image.

> actually iam not understand fully ,

Maybe if you post some example code, or at something that does what you want we can offer more constructive help.

> explaing how to get an image from applet then send it

> ?

I personally think you are going about this the wrong way. You should really think about what data you want the client and server to share.

But hey, Overview: Have the applets draw method also draw to a image. Open a socket connection, use its output stream and the image as params to ImageIO.write.

mlka at 2007-7-8 1:33:09 >

I would not send an Image of the Applet in that case, as it's ineffective (you've got to send thousands of pixels for 1 simple change) and you loose information (what if someone on the other end wants to resize the rectangle created before?)

I'd rather send messages that in essence say "create a rectangle at position x, y with size w, h, border color c1, fill color c2 and border width w". Then the server forwards this message to each client.

This way each client should have the same view of the current state. The advantage is that you only need to send small messages and that you could later add the ability to send "update rectangle 3 to the dimensions w, h".

JoachimSauera at 2007-7-8 1:33:09 >

nice idea ,

now i complete Graphic part and have two questions :

1) if i have 2 client so every client must have the same GUI code in his machine ( copy the java code for graphic in every machine ) ?

2) how i can really appear the affect to the board , when the message forwad to the server and then to other clients

for example : ( client 1 draw rectangle in point x,y with high h and width w ) so iam as a server how can i deal with this message , just forwad it ?

if iam just forwad it so the board will not affect ? or iam must parse the messages and draw the shapes ?

eaajea at 2007-7-8 1:33:10 >

> IMHO the layout should be like this:

>

> - Each participant (the server and each client) has a

> model of the current state of the blackboard (which

> shapes it contains, who made them, which attributes

> they have).

so in my project it will be the applet ( contain ComboBox to draw Shapes , and ComboBox to select the color )

> - When a client connects to the server, it fetches

> the current state of the blackboard from the server,

> to be up-to-date

sorry sir iam not understand this , how the client fetch current state ?

> - When a client makes a change, it sends a message to

> the server with a description of the change.

> - When the server recieves such a change then it

> forwards a similar message (maybe even the same one)

> to each connected client (except the one who just

> sent it, maybe) to update their view as well.

how update the view if iam only sending messages !!

by this way the messages will appear in client then the client draw the shape that describtion in message ,

eaajea at 2007-7-8 1:33:10 >