UI serialization

most of UI elements in ZFFramework is also serializable, and it's easy to serialize from and to xml format
here's a quick example to see the xml output format:

zfobj<ZFUIView> parent;
zfobj<ZFUIButtonBasic> child;
parent->childAdd(child)->c_sizeFill();
child->label()->text("button");
 
ZFSerializableData data = ZFObjectToData(parent);
zfstring xmlString;
ZFSerializableDataToXml(ZFOutputForString(xmlString), data);
zfLogTrim() << "serialized data:";
zfLogTrim() << xmlString;
 
ZFSerializableData dataNew = ZFSerializableDataFromXml(ZFInputForBufferUnsafe(xmlString));
zfauto objNew = ZFObjectFromData(dataNew);
zfLogTrim() << "re-serialized object:";
zfLogTrim() << objNew;

which would output these:

serialized data:
<ZFUIView>
    <ZFUIButtonBasic category="child" >
        <ZFUITextView prop="labelNormal" >
            <zfstring prop="text" value="button" />
        </ZFUITextView>
        <ZFUILayoutParam category="layoutParam" >
            <ZFUISizeParam prop="sizeParam" value="(Fill, Fill)" />
        </ZFUILayoutParam>
    </ZFUIButtonBasic>
</ZFUIView>
 
re-serialized object:
<ZFUIView(0x7fe61e1340b0) (0, 0, 0, 0)>