If we resize the browser's width to make grid's horizontal scrollbar show and then hide, debug will report some warnings.

Here is my test file:

<canvas debug="true">
  <dataset name="contacts" request="true"
  src="http://www.openlaszlo.org/lps/demos/contacts/contactsdata.xml"/>
  <view width="${parent.width/2}">
      <grid datapath="contacts:/resultset" width="${parent.width}">
          <gridcolumn showheader="false" width="50">
          <view bgcolor="#CCCCCC" width="${parent.width}" placement="header"
                height="${parent.immediateparent.height-1}"/>
              <text datapath="position()"/>
          </gridcolumn>
          <gridcolumn width="200"> Name
              <text datapath="@displayname"/>
          </gridcolumn>
          <gridcolumn sortable="false"> Home</gridcolumn>
      </grid>
  </view>
  </canvas>

After resizing the browser to make horizontal scrollbar show and hide, the warnings will be like this:


WARNING: null setters on «lz.scrollbar» scrollable true
WARNING: base/basescrollbar.lzx:322: reference to undefined property 'scrolltrack'
WARNING: null setters on «lz.basescrollthumb» width 14
WARNING: base/basescrollbar.lzx:284: reference to undefined property 'scrolltrack'
WARNING: null setters on «lz.basescrollthumb» x 0
WARNING: null setters on «lz.basescrollthumb» width 14
WARNING: null setters on «lz.scrollbar» scrollable false
                                            .
                                            .
                                            .

It might be fixed if we modify the state in grid.lzx,


<state apply="${ parent.showhscroll &amp;&amp;
            parent.needshscroll &amp;&amp;
            parent.sizetoheader == false}">
            <scrollbar axis="x" scrolltarget="classroot.header.hcontent"/>
</state>


to

<scrollbar axis="x" scrolltarget="classroot.header.hcontent"
                   visible="${ parent.showhscroll &amp;&amp;
                                      parent.needshscroll &amp;&amp;
                                      parent.sizetoheader == false}"/>




-Yuwen