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Posted to batik-users@xmlgraphics.apache.org by James Burton <J....@brighton.ac.uk> on 2013/08/09 00:25:06 UTC
Adding links to a document
I'm new to using batik, and I want to turn all text elements in an
SVGDocument into links which pass the text to a callback. Can you point
me to an example of something similar? I'm finding the text elements
like this:
SVGDocument doc = ...
Element svgRoot = doc.getDocumentElement();
NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
Node n;
for(int i=0;i<labels.getLength();i++) {
n = labels.item(i);
log.info("A label:"+n.getFirstChild().getNodeValue());
//presumably, replace n with a link element that contains n?
}
Thanks in advance,
Jim
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Re: Adding links to a document
Posted by Robert Marcano <ro...@marcanoonline.com>.
On 08/08/2013 05:55 PM, James Burton wrote:
> I'm new to using batik, and I want to turn all text elements in an
> SVGDocument into links which pass the text to a callback. Can you point
> me to an example of something similar? I'm finding the text elements
> like this:
There is no need to
>
> SVGDocument doc = ...
> Element svgRoot = doc.getDocumentElement();
> NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
> Node n;
> for(int i=0;i<labels.getLength();i++) {
> n = labels.item(i);
> log.info("A label:"+n.getFirstChild().getNodeValue());
EventListener l = new EventListener {
public void handleEvent(Event evt) {
// you can try to use the current n element here, that
// means you need to make it final and build one listener
// for each element or use evt.getTarget() to get the
// element and use only one listener instance per document
}
}
n.addEventListener("click", l, false)
> //presumably, replace n with a link element that contains n?
> }
>
You can use too event bubbling on the addEventListener and attach only
one listener on the document root and check the element type you are
getting, instead of attaching a listener to each element, the advantage
of this method is that it work for all text elements you add later
without need to add a listener to them
> Thanks in advance,
>
> Jim
>
> ___________________________________________________________
> This email has been scanned by MessageLabs' Email Security
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Re: Adding links to a document
Posted by jonathan wood <jo...@gmail.com>.
This prob won't compile, and some methods may be misnamed, but it should be
close in spirit!
note that you need to use the xlink namespace for the xlink:href attribute
as shown below. Since a node can only be in one place I chose to use the
shorcut of adding n to a and letting the dom remove it from n.parent.
hope it helps
...
SVGElement a = null;
for(int i=0;i<labels.getLength();i++) {
n = labels.item(i);
log.info("A label:"+n.getFirstChild().**getNodeValue());
//presumably, replace n with a link element that contains n?
a = document.createElementNS(SVGNAMESPACE, "a");
a.setAttributeNS(XLINKNAMESPACE, "xlink;href", my_special_url);
n.getParentNode().appendChild(a);
a.appendChild(n);
}
...
On Thu, Aug 8, 2013 at 6:25 PM, James Burton <J....@brighton.ac.uk>wrote:
> I'm new to using batik, and I want to turn all text elements in an
> SVGDocument into links which pass the text to a callback. Can you point me
> to an example of something similar? I'm finding the text elements like this:
>
> SVGDocument doc = ...
> Element svgRoot = doc.getDocumentElement();
> NodeList labels = svgRoot.**getElementsByTagNameNS("*", "text");
> Node n;
> for(int i=0;i<labels.getLength();i++) {
> n = labels.item(i);
> log.info("A label:"+n.getFirstChild().**getNodeValue());
> //presumably, replace n with a link element that contains n?
> }
>
> Thanks in advance,
>
> Jim
>
> ______________________________**_____________________________
> This email has been scanned by MessageLabs' Email Security
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Re: Adding links to a document
Posted by Robert Marcano <ro...@marcanoonline.com>.
On 08/09/2013 10:26 AM, James Burton wrote:
> On 09/08/13 13:58, Robert Marcano wrote:
>> On 08/08/2013 05:55 PM, James Burton wrote:
>>> I'm new to using batik, and I want to turn all text elements in an
>>> SVGDocument into links which pass the text to a callback. Can you point
>>> me to an example of something similar? I'm finding the text elements
>>> like this:
>>
>> There is no need to modify the document
>>
>
> Hi Robert, thanks for your reply. I've applied your suggestion but
> haven't managed to add links to my document yet as far as I can tell.
> The pointer doesn't change over the text (not sure if it that's the
> default) and more importantly the event handler isn't triggered. Here's
> what it looks like now:
IIRC if your document doesn't contains JavaScript, the canvas consider
it is a static document. You need to tell to the canvas before loading
the document you want them to be dynamic ALWAYS_DYNAMIC or interactive
(ALWAYS_INTERACTIVE), I don't remember which one is for events
canvas.setDocumentState(ALWAYS_DYNAMIC)
You can add a CSS stylesheet (inline or linked) that change the cursor
property to all text elements, you can use standard DOM APIs to add the
style element attributes and content
Element styleElem = doc.createElementNS("http://www.w3.org/2000/svg",
"style");
styleElem.setAttribute("type", "text/css");
Text styleText = doc.createTextNode("text {cursor: pointer}");
styleElem.appendChild(styleText);
doc.getDocumentElement().appendChild(styleElem);
Before setting the document on the canvas I think, I don't remember if
ALWAYS_DYNAMIC notices changes on the CSS
But adding the CSS you are already modifying the document, You can play
with the SVGUserAgent interface and SVGUserAgentGUIAdapter and override
the method that return the user stylesheet, this way all you documents
can have the same CSS without modifying the document
All this because you want a event handler in Java, you don't get the
default <a> links look and feel adding those
>
> for(int i=0;i<labels.getLength();i++) {
> n = labels.item(i);
> log.info("A label:"+n.getFirstChild().getNodeValue());//prints as
> //expected
> EventListener l = new EventListener() {
> public void handleEvent(Event evt) {
> log.info("Clicked on "+(
> (Node) evt.getTarget()).getFirstChild().getNodeValue());
> }
> };
> ((EventTarget) n).addEventListener("click", l, false);
> }
>
> Quite happy to RTFM if someone can point me to a suitable FM. I'm aware
> of http://xmlgraphics.apache.org/batik/using/, but it's low on examples.
> Cheers,
>
> Jim
>
>>>
>>> SVGDocument doc = ...
>>> Element svgRoot = doc.getDocumentElement();
>>> NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
>>> Node n;
>>> for(int i=0;i<labels.getLength();i++) {
>>> n = labels.item(i);
>>> log.info("A label:"+n.getFirstChild().getNodeValue());
>>
>> EventListener l = new EventListener {
>> public void handleEvent(Event evt) {
>> // you can try to use the current n element here, that
>> // means you need to make it final and build one listener
>> // for each element or use evt.getTarget() to get the
>> // element and use only one listener instance per document
>> }
>> }
>> n.addEventListener("click", l, false)
>>
>>> //presumably, replace n with a link element that contains n?
>>> }
>>>
>>
>> You can use too event bubbling on the addEventListener and attach only
>> one listener on the document root and check the element type you are
>> getting, instead of attaching a listener to each element, the advantage
>> of this method is that it work for all text elements you add later
>> without need to add a listener to them
>>
>>
>>> Thanks in advance,
>>>
>>> Jim
>>>
>>> ___________________________________________________________
>>> This email has been scanned by MessageLabs' Email Security
>>> System on behalf of the University of Brighton.
>>> For more information see http://www.brighton.ac.uk/is/spam/
>>> ___________________________________________________________
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
>>> For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org
>>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
>> For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org
>>
>>
>> ___________________________________________________________
>> This email has been scanned by MessageLabs' Email Security
>> System on behalf of the University of Brighton.
>> For more information see http://www.brighton.ac.uk/is/spam/
>> ___________________________________________________________
>
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Re: Adding links to a document
Posted by James Burton <J....@brighton.ac.uk>.
On 09/08/13 13:58, Robert Marcano wrote:
> On 08/08/2013 05:55 PM, James Burton wrote:
>> I'm new to using batik, and I want to turn all text elements in an
>> SVGDocument into links which pass the text to a callback. Can you point
>> me to an example of something similar? I'm finding the text elements
>> like this:
>
> There is no need to modify the document
>
Hi Robert, thanks for your reply. I've applied your suggestion but
haven't managed to add links to my document yet as far as I can tell.
The pointer doesn't change over the text (not sure if it that's the
default) and more importantly the event handler isn't triggered. Here's
what it looks like now:
for(int i=0;i<labels.getLength();i++) {
n = labels.item(i);
log.info("A label:"+n.getFirstChild().getNodeValue());//prints as
//expected
EventListener l = new EventListener() {
public void handleEvent(Event evt) {
log.info("Clicked on "+(
(Node) evt.getTarget()).getFirstChild().getNodeValue());
}
};
((EventTarget) n).addEventListener("click", l, false);
}
Quite happy to RTFM if someone can point me to a suitable FM. I'm aware
of http://xmlgraphics.apache.org/batik/using/, but it's low on examples.
Cheers,
Jim
>>
>> SVGDocument doc = ...
>> Element svgRoot = doc.getDocumentElement();
>> NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
>> Node n;
>> for(int i=0;i<labels.getLength();i++) {
>> n = labels.item(i);
>> log.info("A label:"+n.getFirstChild().getNodeValue());
>
> EventListener l = new EventListener {
> public void handleEvent(Event evt) {
> // you can try to use the current n element here, that
> // means you need to make it final and build one listener
> // for each element or use evt.getTarget() to get the
> // element and use only one listener instance per document
> }
> }
> n.addEventListener("click", l, false)
>
>> //presumably, replace n with a link element that contains n?
>> }
>>
>
> You can use too event bubbling on the addEventListener and attach only
> one listener on the document root and check the element type you are
> getting, instead of attaching a listener to each element, the advantage
> of this method is that it work for all text elements you add later
> without need to add a listener to them
>
>
>> Thanks in advance,
>>
>> Jim
>>
>> ___________________________________________________________
>> This email has been scanned by MessageLabs' Email Security
>> System on behalf of the University of Brighton.
>> For more information see http://www.brighton.ac.uk/is/spam/
>> ___________________________________________________________
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
>> For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org
>
>
> ___________________________________________________________
> This email has been scanned by MessageLabs' Email Security
> System on behalf of the University of Brighton.
> For more information see http://www.brighton.ac.uk/is/spam/
> ___________________________________________________________
--
Dr Jim Burton
Senior Lecturer in Computing
School of Computing, Engineering and Mathematics
University of Brighton
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Re: Adding links to a document
Posted by Robert Marcano <ro...@marcanoonline.com>.
On 08/08/2013 05:55 PM, James Burton wrote:
> I'm new to using batik, and I want to turn all text elements in an
> SVGDocument into links which pass the text to a callback. Can you point
> me to an example of something similar? I'm finding the text elements
> like this:
There is no need to modify the document
>
> SVGDocument doc = ...
> Element svgRoot = doc.getDocumentElement();
> NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
> Node n;
> for(int i=0;i<labels.getLength();i++) {
> n = labels.item(i);
> log.info("A label:"+n.getFirstChild().getNodeValue());
EventListener l = new EventListener {
public void handleEvent(Event evt) {
// you can try to use the current n element here, that
// means you need to make it final and build one listener
// for each element or use evt.getTarget() to get the
// element and use only one listener instance per document
}
}
n.addEventListener("click", l, false)
> //presumably, replace n with a link element that contains n?
> }
>
You can use too event bubbling on the addEventListener and attach only
one listener on the document root and check the element type you are
getting, instead of attaching a listener to each element, the advantage
of this method is that it work for all text elements you add later
without need to add a listener to them
> Thanks in advance,
>
> Jim
>
> ___________________________________________________________
> This email has been scanned by MessageLabs' Email Security
> System on behalf of the University of Brighton.
> For more information see http://www.brighton.ac.uk/is/spam/
> ___________________________________________________________
>
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> To unsubscribe, e-mail: batik-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: batik-users-help@xmlgraphics.apache.org
>
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