Sorry but newbie question

[Vincent Richomme]

Hi,

I am sorry to ask this question but since I am a newbie regarding the xml thing.
I would like to create a XML document with the following format :

<?xml version="1.0" encoding="ISO-8859-1"?>
<resource  version="0.1">

<object class="label">
    <pos>100,50</pos>
    <size>320,200</size>
    <color>blue</color>
</object>

<object class="editbox">
    <pos>100,50</pos>
    <size>320,200</size>
    <color>blue</color>
</object>
</resource>

the node are obtained by parsing a list :

bool CDummy::CreateXML()
{
LPCTSTR     szProlog = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"
        "<resource version=\"0.1\">"
        "</resource>";

TiXmlDocument Doc;
Doc.Parse( szProlog );

    while (posDynControl){
  
    insert new node object with attribute class="label"
   go inside this node and add the child element pos, size and color

  get out the current node
   }
}  

How can I do this ?

I suppose that first I need to go to resource node but after I don't know

[Ellers]

Aspects of what you want are addressed in this tutorial:

http://software.ellerton.net/tinyxml.html

e.g. at:

http://software.ellerton.net/tinyxml.html#building-documents-pragmatically

Try that for a start, and post back here with more specifics if you need to...

Ellers

[Vincent Richomme]

thnaks

[Vincent Richomme]

Actually now I have a question, in the tutorial they are using
pointers so I suppose I need to delete them after use :

TiXmlDocument doc;
    TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "", "" );
    doc.LinkEndChild( decl );
   
    TiXmlElement * element = new TiXmlElement( "Hello" );
    doc.LinkEndChild( element );
   
    TiXmlText * text = new TiXmlText( "World" );
    element->LinkEndChild( text );

What if I want to use object, I tried and it compiled fine but xml was not good.

TiXmlDeclaration decl( "1.0", "", "" );
    doc.InsertEndChild( decl );

...

Is there any example with objects, ?

[Ellers]

Hmm. You might need to read some more C++ basics, but I'll try to help.

A TiXmlDocument instance is an object of class TiXmlDocument. If you use new() then it is allocated dynamically on the heap; if you do not use new (the second form in your example) then it is allocated statically on the stack. This is all basic C++ stuff.

The objects you add to a TiXmlDocument are owned by that document - they will be deleted when that document is deleted.

Therefore in this code:

void write_simple_doc( )
{
    TiXmlDocument doc;
    TiXmlDeclaration * decl = new TiXmlDeclaration( "1.0", "", "" );
    TiXmlElement * element = new TiXmlElement( "Hello" );
    TiXmlText * text = new TiXmlText( "World" );
    element->LinkEndChild( text );
    doc.LinkEndChild( decl );
    doc.LinkEndChild( element );
}

at the end of this block, 'doc' will go out of scope, and it will delete all the TiXmlElement/Text nodes that were allocated automatically.

You can look into TiXmlHandles too, but I think thats mostly for retrieving data from a pre-built DOM.

HTH
Ellers