Pascal, The great thing about JSON is that the principle is trivial.
The concept is to send a text string which is evaluated (usually through an 'eval' statement) in the client side. The string is verbatim the source code that generates the structure on the client side. In other words, it is fundamentally a clientside scripting code injection. Take a look at: [1] the json website http://www.json.org [2] a talk at www2006 by the creator of json http://www2006.org/programme/item.php?id=d8 [3] a talk I gave at EU SVG Workshop and at www2006 about an SVG Ajax implementation based on JSON http://www.roitsystems.com/twiki/bin/view/SVGWorkshop/TalkSVGDataWidgets On Tuesday 12 September 2006 12:14, Pascal BENOIST wrote: > Hi Andreas, > > > > In a way to have a better comprehension of JSON principles, could you send > me the php file that write the json code (like sendNameData.php) ? > > > > Pascal BENOIST > [EMAIL PROTECTED] > Mob: +33 (0)6 12 61 68 02 > Fixe: +33 (0)4 50 75 17 74 > > _____ > > De : svg-developers@yahoogroups.com [mailto:[EMAIL PROTECTED] > De la part de Andreas Neumann > Envoyé : jeudi 3 août 2006 23:37 > À : svg-developers@yahoogroups.com > Objet : [svg-developers] Re: populate a carto.net selectionList > > > > Hi Pascal, > > you can use the json format for that purpose, which is basically javascript > code generated > dynamically on the server and sent to the client as text. The client > receives the text string > and can use with eval(textstring) or a function to interpret the javascript > code. > > I haven't documented it yet, but here is a wrapper function for > getURL/XMLHttpRequest > that allows to either retrieve an XML node or text to be used with eval(). > > http://www.carto. > <http://www.carto.net/williams/yosemite/helper_functions.js> > net/williams/yosemite/helper_functions.js > > have a look at the getData object. Note that his object is slightly > different from the original > getXMLData object. It allows for a third parameter that can have the values > "xml" or "json" > > in http://www.carto. <http://www.carto.net/williams/yosemite/search.js> > net/williams/yosemite/search.js > have a look at the method "searchObject.prototype.receiveData" which > receives the json > text and returns the javascript array through a function. > > You can use the variable myResults as an array to populate the > selectionList > > Here is an example server request that returns a json array: > > http://www.carto. > <http://www.carto.net/williams/yosemite/sendNameData.php?> > net/williams/yosemite/sendNameData.php? > searchstring=Half&searchtype=starts > with&offset=0&limit=10&xmin=244000&ymin=4150000&xmax=308000&ymax=423100 > 0&filterByMapExtent=false > > I plan to document these XML/JSON network requests in a tutorial on > carto.net but am > currently busy. Will take a bit of time until it is available ... > > Hope this helps a bit, > Andreas > > --- In svg-developers@ <mailto:svg-developers%40yahoogroups.com> > yahoogroups.com, "Pascal BENOIST" <[EMAIL PROTECTED]> > > wrote: > > Hi Andreas, > > > > > > > > Thanks a lot for your answer, > > > > Its ok for the update of the list. > > > > My problem in fact is to obtain the node from the url or XMLHttpRequest > > when > > > you say: > > > > �you can query a new array from the database on the server using a > > network request (XMLHttpRequest and getURL).� > > > > I would like to use the same fonctions that I use to retrieve geometry (I > > already use helpers_functions.js for that). > > > > I don�t know how to retrieve data that is not <g> or that is not XML > > like an > > > array of elements� > > > > Am I obliged to integrate it in a <g> element in my svg before to use it > > through a js script? > > > > Pascal BENOIST > > Mob: +33 (0)6 12 61 68 02 > > Fixe: +33 (0)4 50 75 17 74 > > > > _____ > > > > De : svg-developers@ <mailto:svg-developers%40yahoogroups.com> > > yahoogroups.com [mailto:svg-developers@ > <mailto:svg-developers%40yahoogroups.com> yahoogroups.com] > > > De la part de Andreas Neumann > > Envoy� : mercredi 2 ao�t 2006 15:53 > > � : svg-developers@ <mailto:svg-developers%40yahoogroups.com> > > yahoogroups.com > > > Objet : [svg-developers] Re: populate a carto.net selectionList > > > > > > > > HI Pascal, > > > > its actually easier than that. You don't need to remove and add > > individual elements, you can simply replace the property > > ".elementsArray" of the second selectionList, e.g. > > ------- > > selectionList2.elementsArray = newArray; > > selectionList2.selectElementByPosition(0,false); > > ------- > > > > note that I propose to also call the method > > .selectElementByPosition() to make sure that the second > > selectionlist now displays a valid value of the new array. > > > > As an example see http://www.carto. > > <http://www.carto. <http://www.carto.net/papers/svg/gui/selectionlist/> > > net/papers/svg/gui/selectionlist/> > > > net/papers/svg/gui/selectionlist/ > > index.svg > > > > see the two selectionlists at the upper right. > > > > See http://www.carto. > > <http://www.carto. > > <http://www.carto.net/papers/svg/gui/selectionlist/init.js> > net/papers/svg/gui/selectionlist/init.js> > > > net/papers/svg/gui/selectionlist/init.js and the > > function "updateNumbers2" to see how I set the new values. > > > > you can query a new array from the database on the server using a > > network request (XMLHttpRequest and getURL). > > > > The same also works for comboboxes: see http://www.carto. > > <http://www.carto. <http://www.carto.net/williams/> net/williams/> > > net/williams/ > > > yosemite/, go to the "Search" tab and enter something in the texbox. > > As you type the values in the combobox are populated with the results > > of a database query. > > > > Hope this helps, > > Andreas > > > > --- In svg-developers@ <mailto:svg-developers%40yahoogroups.com> > > yahoogroups.com, > > > > "pascal.benoist" <pascal.benoist11@> wrote: > > > Hello, > > > > > > I just developpe a little query builder for my svg application and > > > > i > > > > > use SelectionLists from carto.net > > > > > > I would like to populate automatically a selectionList from the > > > choice made in a preceding selectionList. > > > First, I create 2 selectionLists (selectionList1 and > > > > selectionList2) > > > > > The first one is populated directly at the creation. > > > The second one is first populated with a empty array. > > > > > > I choose a value in SelectionList1 > > > Then , I run a PHP script with this parameter, request my DB (I > > > request : > > > DESCRIBE <MyTable> ) with <MyTable> the item selected in > > > selectionList1 Then, I would like to automatically populate > > > selectionList2 with the values return from the request (those > > > > values > > > > > are the Fields of <MyTable>) > > > > > > Would you have any tutorial that explain that? > > > > > > Secondly, I cannot understand why the above Javascript code does > > > > not > > > > > work : > > > function updateSelectionList > > > selectionListName,selectedIndex,selectedValue) > > > { > > > // reinitialisation de selectionListDynLayer > > > position = 0; > > > while > > > (selectionListDynLayer.selectElementByPosition(position,false)) { > > > MyAlert("deleting element position " + position > > > + " : " + selectionListDynLayer.getCurrentSelectionElement()); > > > > > > selectionListDynLayer.deleteElement > > > (selectionListDynLayer.getCurrentSelectio > > > nElement()); > > > position++; > > > } > > > > > > MyAlert("selected : " + selectedValue); > > > selectionListArray = new > > > Array(getSelectionListArray(selectedValue)); > > > > > > MyAlert("selectionListArray : " + selectionListArray); > > > for (i=0;i<selectionListArray.length;i++) { > > > selectionListDynLayer.addElementAtPosition(selectionListArray > > > [i],i); > > > } > > > } > > > > > > function getSelectionListArray(MyTable) { > > > PHPFileName = "../files/getSelectionListArray.php?MyTable=" > > > + MyTable; > > > getDataObjSelectionListArray.url=PHPFileName; > > > getDataObjSelectionListArray.getData(); > > > } > > > > > > function callbackSelectionListArray(theNode) { > > > MyAlert("callback:" + printNode(theNode)); > > > return theNode; // not sure it is a good idea ... > > > } > > > > > > Thanks > > ---------------------------------------------------------- > > > ----------- > > Orange vous informe que cet e-mail a �t� contr�l� par > > l'anti-virus > > mail. > > > Aucun virus connu � ce jour par nos services n'a �t� d�tect�. > > > > > > > > > > > > [Non-text portions of this message have been removed] > > --------------------------------------------------------------------------- >- ----------- > Orange vous informe que cet e-mail a été contrôlé par l'anti-virus mail. > Aucun virus connu à ce jour par nos services n'a été détecté. > > > > > > [Non-text portions of this message have been removed] > > > > ----- > To unsubscribe send a message to: > [EMAIL PROTECTED] -or- > visit http://groups.yahoo.com/group/svg-developers and click "edit my > membership" ---- > Yahoo! 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