<?xml version="1.0"?> <!-- This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at http://mozilla.org/MPL/2.0/. --> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <!DOCTYPE window> <window orient="vertical" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <hbox flex="1"> <grid style="border: 2px solid red" flex="1"> <rows> <row flex="1"/> <row flex="1"/> <row flex="1"/> </rows> <columns> <column> <button label="left"/> <button label="left"/> <button label="left"/> </column> <columns flex="1" style="min-width: 1px; overflow: auto; background-color: green"> <column> <button label="cell1"/> <button label="cell1"/> <button label="cell1"/> </column> <column> <button label="cell2"/> <button label="cell2"/> <button label="cell2"/> </column> <column> <button label="cell3"/> <button label="cell3"/> <button label="cell3"/> </column> <column> <button label="cell4"/> <button label="cell4"/> <button label="cell4"/> </column> <column> <button label="cell5"/> <button label="cell5"/> <button label="cell5"/> </column> <column> <button label="cell6"/> <button label="cell6"/> <button label="cell6"/> </column> <column> <button label="cell7"/> <button label="cell7"/> <button label="cell7"/> </column> </columns> <column> <button label="right"/> <button label="right"/> <button label="right"/> </column> </columns> </grid> <spacer width="100"/> </hbox> <spacer height="100"/> </window>