--- a/src/browser/sat_browser/base_widget.py	Thu Feb 05 12:05:32 2015 +0100
+++ b/src/browser/sat_browser/base_widget.py	Wed Mar 18 16:15:18 2015 +0100
@@ -17,154 +17,21 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import pyjd  # this is dummy in pyjs
 from sat.core.log import getLogger
 log = getLogger(__name__)
-from pyjamas.ui.SimplePanel import SimplePanel
-from pyjamas.ui.AbsolutePanel import AbsolutePanel
-from pyjamas.ui.VerticalPanel import VerticalPanel
-from pyjamas.ui.HorizontalPanel import HorizontalPanel
-from pyjamas.ui.ScrollPanel import ScrollPanel
-from pyjamas.ui.FlexTable import FlexTable
-from pyjamas.ui.TabPanel import TabPanel
-from pyjamas.ui.HTMLPanel import HTMLPanel
-from pyjamas.ui.Label import Label
-from pyjamas.ui.HTML import HTML
-from pyjamas.ui.Button import Button
-from pyjamas.ui.Widget import Widget
-from pyjamas.ui.DragWidget import DragWidget
-from pyjamas.ui.DropWidget import DropWidget
-from pyjamas.ui.ClickListener import ClickHandler
-from pyjamas.ui import HasAlignment
-from pyjamas import DOM
-from pyjamas import Window
-
-from __pyjamas__ import doc
-
-import dialog
 import base_menu
-
-
-class DragLabel(DragWidget):
-
-    def __init__(self, text, _type):
-        DragWidget.__init__(self)
-        self._text = text
-        self._type = _type
-
-    def onDragStart(self, event):
-        dt = event.dataTransfer
-        dt.setData('text/plain', "%s\n%s" % (self._text, self._type))
-        dt.setDragImage(self.getElement(), 15, 15)
-
-
-class LiberviaDragWidget(DragLabel):
-    """ A DragLabel which keep the widget being dragged as class value """
-    current = None  # widget currently dragged
-
-    def __init__(self, text, _type, widget):
-        DragLabel.__init__(self, text, _type)
-        self.widget = widget
-
-    def onDragStart(self, event):
-        LiberviaDragWidget.current = self.widget
-        DragLabel.onDragStart(self, event)
-
-    def onDragEnd(self, event):
-        LiberviaDragWidget.current = None
+from sat_frontends.quick_frontend import quick_menus
 
 
-class DropCell(DropWidget):
-    """Cell in the middle grid which replace itself with the dropped widget on DnD"""
-    drop_keys = {}
-
-    def __init__(self, host):
-        DropWidget.__init__(self)
-        self.host = host
-        self.setStyleName('dropCell')
-
-    @classmethod
-    def addDropKey(cls, key, callback):
-        DropCell.drop_keys[key] = callback
+### Exceptions ###
 
-    def onDragEnter(self, event):
-        if self == LiberviaDragWidget.current:
-            return
-        self.addStyleName('dragover')
-        DOM.eventPreventDefault(event)
-
-    def onDragLeave(self, event):
-        if event.clientX <= self.getAbsoluteLeft() or event.clientY <= self.getAbsoluteTop() or\
-            event.clientX >= self.getAbsoluteLeft() + self.getOffsetWidth() - 1 or event.clientY >= self.getAbsoluteTop() + self.getOffsetHeight() - 1:
-            # We check that we are inside widget's box, and we don't remove the style in this case because
-            # if the mouse is over a widget inside the DropWidget, if will leave the DropWidget, and we
-            # don't want that
-            self.removeStyleName('dragover')
-
-    def onDragOver(self, event):
-        DOM.eventPreventDefault(event)
-
-    def _getCellAndRow(self, grid, event):
-        """Return cell and row index where the event is occuring"""
-        cell = grid.getEventTargetCell(event)
-        row = DOM.getParent(cell)
-        return (row.rowIndex, cell.cellIndex)
 
-    def onDrop(self, event):
-        self.removeStyleName('dragover')
-        DOM.eventPreventDefault(event)
-        dt = event.dataTransfer
-        # 'text', 'text/plain', and 'Text' are equivalent.
-        try:
-            item, item_type = dt.getData("text/plain").split('\n')  # Workaround for webkit, only text/plain seems to be managed
-            if item_type and item_type[-1] == '\0':  # Workaround for what looks like a pyjamas bug: the \0 should not be there, and
-                item_type = item_type[:-1]           # .strip('\0') and .replace('\0','') don't work. TODO: check this and fill a bug report
-            # item_type = dt.getData("type")
-            log.debug("message: %s" % item)
-            log.debug("type: %s" % item_type)
-        except:
-            log.debug("no message found")
-            item = '&nbsp;'
-            item_type = None
-        if item_type == "WIDGET":
-            if not LiberviaDragWidget.current:
-                log.error("No widget registered in LiberviaDragWidget !")
-                return
-            _new_panel = LiberviaDragWidget.current
-            if self == _new_panel:  # We can't drop on ourself
-                return
-            # we need to remove the widget from the panel as it will be inserted elsewhere
-            widgets_panel = _new_panel.getWidgetsPanel()
-            wid_row = widgets_panel.getWidgetCoords(_new_panel)[0]
-            row_wids = widgets_panel.getLiberviaRowWidgets(wid_row)
-            if len(row_wids) == 1 and wid_row == widgets_panel.getWidgetCoords(self)[0]:
-                # the dropped widget is the only one in the same row
-                # as the target widget (self), we don't do anything
-                return
-            widgets_panel.removeWidget(_new_panel)
-        elif item_type in self.drop_keys:
-            _new_panel = self.drop_keys[item_type](self.host, item)
-        else:
-            log.warning("unmanaged item type")
-            return
-        if isinstance(self, LiberviaWidget):
-            self.host.unregisterWidget(self)
-            self.onQuit()
-            if not isinstance(_new_panel, LiberviaWidget):
-                log.warning("droping an object which is not a class of LiberviaWidget")
-        _flextable = self.getParent()
-        _widgetspanel = _flextable.getParent().getParent()
-        row_idx, cell_idx = self._getCellAndRow(_flextable, event)
-        if self.host.getSelected == self:
-            self.host.setSelected(None)
-        _widgetspanel.changeWidget(row_idx, cell_idx, _new_panel)
-        """_unempty_panels = filter(lambda wid:not isinstance(wid,EmptyWidget),list(_flextable))
-        _width = 90/float(len(_unempty_panels) or 1)
-        #now we resize all the cell of the column
-        for panel in _unempty_panels:
-            td_elt = panel.getElement().parentNode
-            DOM.setStyleAttribute(td_elt, "width", "%s%%" % _width)"""
-        #FIXME: delete object ? Check the right way with pyjamas
+class NoLiberviaWidgetException(Exception):
+    """A Libervia widget was expected"""
+    pass
+
+
+### Menus ###
 
 
 class WidgetMenuBar(base_menu.GenericMenuBar):
@@ -172,629 +39,28 @@
     ITEM_TPL = "<img src='media/icons/misc/%s.png' />"
 
     def __init__(self, parent, host, vertical=False, styles=None):
+        """
+
+        @param parent (Widget): LiberviaWidget, or instance of another class
+            implementing the method addMenus
+        @param host (SatWebFrontend)
+        @param vertical (bool): if True, set the menu vertically
+        @param styles (dict): optional styles dict
+        """
         menu_styles = {'menu_bar': 'widgetHeader_buttonGroup'}
         if styles:
             menu_styles.update(styles)
         base_menu.GenericMenuBar.__init__(self, host, vertical=vertical, styles=menu_styles)
 
-        if hasattr(parent, 'addMenus'):
-            # regroup all the dynamic menu categories in a sub-menu
-            sub_menu = WidgetSubMenuBar(host, vertical=True)
-            parent.addMenus(sub_menu)
-            if len(sub_menu.getCategories()) > 0:
-                self.addCategory('', '', 'plugins', sub_menu)
-
-    @classmethod
-    def getCategoryHTML(cls, menu_name_i18n, type_):
-        return cls.ITEM_TPL % type_
-
-
-class WidgetSubMenuBar(base_menu.GenericMenuBar):
-
-    def __init__(self, host, vertical=True):
-        base_menu.GenericMenuBar.__init__(self, host, vertical=vertical, flat_level=1)
+        # regroup all the dynamic menu categories in a sub-menu
+        for menu_context in parent.plugin_menu_context:
+            main_cont = host.menus.getMainContainer(menu_context)
+            if len(main_cont)>0: # we don't add the icon if the menu is empty
+                sub_menu = base_menu.GenericMenuBar(host, vertical=True, flat_level=1)
+                sub_menu.update(menu_context, parent)
+                menu_category = quick_menus.MenuCategory("plugins", extra={'icon':'plugins'})
+                self.addCategory(menu_category, sub_menu)
 
     @classmethod
-    def getCategoryHTML(cls, menu_name_i18n, type_):
-        return menu_name_i18n
-
-
-class WidgetHeader(AbsolutePanel, LiberviaDragWidget):
-
-    def __init__(self, parent, host, title, info=None):
-        """
-        @param parent (LiberviaWidget): LiberWidget instance
-        @param host (SatWebFrontend): SatWebFrontend instance
-        @param title (Label, HTML): text widget instance
-        @param info (Widget): text widget instance
-        """
-        AbsolutePanel.__init__(self)
-        self.add(title)
-        if info:
-            # FIXME: temporary design to display the info near the menu
-            button_group_wrapper = HorizontalPanel()
-            button_group_wrapper.add(info)
-        else:
-            button_group_wrapper = SimplePanel()
-        button_group_wrapper.setStyleName('widgetHeader_buttonsWrapper')
-        button_group = WidgetMenuBar(parent, host)
-        button_group.addItem('<img src="media/icons/misc/settings.png"/>', True, base_menu.MenuCmd(parent, 'onSetting'))
-        button_group.addItem('<img src="media/icons/misc/close.png"/>', True, base_menu.MenuCmd(parent, 'onClose'))
-        button_group_wrapper.add(button_group)
-        self.add(button_group_wrapper)
-        self.addStyleName('widgetHeader')
-        LiberviaDragWidget.__init__(self, "", "WIDGET", parent)
-
-
-class LiberviaWidget(DropCell, VerticalPanel, ClickHandler):
-    """Libervia's widget which can replace itself with a dropped widget on DnD"""
-
-    def __init__(self, host, title='', info=None, selectable=False):
-        """Init the widget
-        @param host (SatWebFrontend): SatWebFrontend instance
-        @param title (str): title shown in the header of the widget
-        @param info (str, callable): info shown in the header of the widget
-        @param selectable (bool): True is widget can be selected by user"""
-        VerticalPanel.__init__(self)
-        DropCell.__init__(self, host)
-        ClickHandler.__init__(self)
-        self.__selectable = selectable
-        self.__title_id = HTMLPanel.createUniqueId()
-        self.__setting_button_id = HTMLPanel.createUniqueId()
-        self.__close_button_id = HTMLPanel.createUniqueId()
-        self.__title = Label(title)
-        self.__title.setStyleName('widgetHeader_title')
-        if info is not None:
-            if isinstance(info, str):
-                self.__info = HTML(info)
-            else:  # the info will be set by a callback
-                assert(callable(info))
-                self.__info = HTML()
-                info(self.__info.setHTML)
-            self.__info.setStyleName('widgetHeader_info')
-        else:
-            self.__info = None
-        self._close_listeners = []
-        header = WidgetHeader(self, host, self.__title, self.__info)
-        self.add(header)
-        self.setSize('100%', '100%')
-        self.addStyleName('widget')
-        if self.__selectable:
-            self.addClickListener(self)
-
-            def onClose(sender):
-                """Check dynamically if the unibox is enable or not"""
-                if self.host.uni_box:
-                    self.host.uni_box.onWidgetClosed(sender)
-
-            self.addCloseListener(onClose)
-        self.host.registerWidget(self)
-
-    def getDebugName(self):
-        return "%s (%s)" % (self, self.__title.getText())
-
-    def getWidgetsPanel(self, expect=True):
-        return self.getParent(WidgetsPanel, expect)
-
-    def getParent(self, class_=None, expect=True):
-        """Return the closest ancestor of the specified class.
-
-        Note: this method overrides pyjamas.ui.Widget.getParent
-
-        @param class_: class of the ancestor to look for or None to return the first parent
-        @param expect: set to True if the parent is expected (print a message if not found)
-        @return: the parent/ancestor or None if it has not been found
-        """
-        current = Widget.getParent(self)
-        if class_ is None:
-            return current  # this is the default behavior
-        while current is not None and not isinstance(current, class_):
-            current = Widget.getParent(current)
-        if current is None and expect:
-            log.error("Can't find parent %s for %s" % (class_, self))
-        return current
-
-    def onClick(self, sender):
-        self.host.setSelected(self)
-
-    def onClose(self, sender):
-        """ Called when the close button is pushed """
-        _widgetspanel = self.getWidgetsPanel()
-        _widgetspanel.removeWidget(self)
-        for callback in self._close_listeners:
-            callback(self)
-        self.onQuit()
-
-    def onQuit(self):
-        """ Called when the widget is actually ending """
-        pass
-
-    def addCloseListener(self, callback):
-        """Add a close listener to this widget
-        @param callback: function to be called from self.onClose"""
-        self._close_listeners.append(callback)
-
-    def refresh(self):
-        """This can be overwritten by a child class to refresh the display when,
-        instead of creating a new one, an existing widget is found and reused.
-        """
-        pass
-
-    def onSetting(self, sender):
-        widpanel = self.getWidgetsPanel()
-        row, col = widpanel.getIndex(self)
-        body = VerticalPanel()
-
-        # colspan & rowspan
-        colspan = widpanel.getColSpan(row, col)
-        rowspan = widpanel.getRowSpan(row, col)
-
-        def onColSpanChange(value):
-            widpanel.setColSpan(row, col, value)
-
-        def onRowSpanChange(value):
-            widpanel.setRowSpan(row, col, value)
-        colspan_setter = dialog.IntSetter("Columns span", colspan)
-        colspan_setter.addValueChangeListener(onColSpanChange)
-        colspan_setter.setWidth('100%')
-        rowspan_setter = dialog.IntSetter("Rows span", rowspan)
-        rowspan_setter.addValueChangeListener(onRowSpanChange)
-        rowspan_setter.setWidth('100%')
-        body.add(colspan_setter)
-        body.add(rowspan_setter)
-
-        # size
-        width_str = self.getWidth()
-        if width_str.endswith('px'):
-            width = int(width_str[:-2])
-        else:
-            width = 0
-        height_str = self.getHeight()
-        if height_str.endswith('px'):
-            height = int(height_str[:-2])
-        else:
-            height = 0
-
-        def onWidthChange(value):
-            if not value:
-                self.setWidth('100%')
-            else:
-                self.setWidth('%dpx' % value)
-
-        def onHeightChange(value):
-            if not value:
-                self.setHeight('100%')
-            else:
-                self.setHeight('%dpx' % value)
-        width_setter = dialog.IntSetter("width (0=auto)", width)
-        width_setter.addValueChangeListener(onWidthChange)
-        width_setter.setWidth('100%')
-        height_setter = dialog.IntSetter("height (0=auto)", height)
-        height_setter.addValueChangeListener(onHeightChange)
-        height_setter.setHeight('100%')
-        body.add(width_setter)
-        body.add(height_setter)
-
-        # reset
-        def onReset(sender):
-            colspan_setter.setValue(1)
-            rowspan_setter.setValue(1)
-            width_setter.setValue(0)
-            height_setter.setValue(0)
-
-        reset_bt = Button("Reset", onReset)
-        body.add(reset_bt)
-        body.setCellHorizontalAlignment(reset_bt, HasAlignment.ALIGN_CENTER)
-
-        _dialog = dialog.GenericDialog("Widget setting", body)
-        _dialog.show()
-
-    def setTitle(self, text):
-        """change the title in the header of the widget
-        @param text: text of the new title"""
-        self.__title.setText(text)
-
-    def setHeaderInfo(self, text):
-        """change the info in the header of the widget
-        @param text: text of the new title"""
-        try:
-            self.__info.setHTML(text)
-        except TypeError:
-            log.error("LiberviaWidget.setInfo: info widget has not been initialized!")
-
-    def isSelectable(self):
-        return self.__selectable
-
-    def setSelectable(self, selectable):
-        if not self.__selectable:
-            try:
-                self.removeClickListener(self)
-            except ValueError:
-                pass
-        if self.selectable and not self in self._clickListeners:
-            self.addClickListener(self)
-        self.__selectable = selectable
-
-    def getWarningData(self):
-        """ Return exposition warning level when this widget is selected and something is sent to it
-        This method should be overriden by children
-        @return: tuple (warning level type/HTML msg). Type can be one of:
-            - PUBLIC
-            - GROUP
-            - ONE2ONE
-            - MISC
-            - NONE
-        """
-        if not self.__selectable:
-            log.error("getWarningLevel must not be called for an unselectable widget")
-            raise Exception
-        # TODO: cleaner warning types (more general constants)
-        return ("NONE", None)
-
-    def setWidget(self, widget, scrollable=True):
-        """Set the widget that will be in the body of the LiberviaWidget
-        @param widget: widget to put in the body
-        @param scrollable: if true, the widget will be in a ScrollPanelWrapper"""
-        if scrollable:
-            _scrollpanelwrapper = ScrollPanelWrapper()
-            _scrollpanelwrapper.setStyleName('widgetBody')
-            _scrollpanelwrapper.setWidget(widget)
-            body_wid = _scrollpanelwrapper
-        else:
-            body_wid = widget
-        self.add(body_wid)
-        self.setCellHeight(body_wid, '100%')
-
-    def doDetachChildren(self):
-        # We need to force the use of a panel subclass method here,
-        # for the same reason as doAttachChildren
-        VerticalPanel.doDetachChildren(self)
-
-    def doAttachChildren(self):
-        # We need to force the use of a panel subclass method here, else
-        # the event will not propagate to children
-        VerticalPanel.doAttachChildren(self)
-
-    def matchEntity(self, item):
-        """Check if this widget corresponds to the given entity.
-
-        This method should be overwritten by child classes.
-        @return: True if the widget matches the entity"""
-        raise NotImplementedError
-
-    def addMenus(self, menu_bar):
-        """Add menus to the header.
-
-        This method can be overwritten by child classes.
-        @param menu_bar (GenericMenuBar): menu bar of the widget's header
-        """
-        pass
-
-
-class ScrollPanelWrapper(SimplePanel):
-    """Scroll Panel like component, wich use the full available space
-    to work around percent size issue, it use some of the ideas found
-    here: http://code.google.com/p/google-web-toolkit/issues/detail?id=316
-    specially in code given at comment #46, thanks to Stefan Bachert"""
-
-    def __init__(self, *args, **kwargs):
-        SimplePanel.__init__(self)
-        self.spanel = ScrollPanel(*args, **kwargs)
-        SimplePanel.setWidget(self, self.spanel)
-        DOM.setStyleAttribute(self.getElement(), "position", "relative")
-        DOM.setStyleAttribute(self.getElement(), "top", "0px")
-        DOM.setStyleAttribute(self.getElement(), "left", "0px")
-        DOM.setStyleAttribute(self.getElement(), "width", "100%")
-        DOM.setStyleAttribute(self.getElement(), "height", "100%")
-        DOM.setStyleAttribute(self.spanel.getElement(), "position", "absolute")
-        DOM.setStyleAttribute(self.spanel.getElement(), "width", "100%")
-        DOM.setStyleAttribute(self.spanel.getElement(), "height", "100%")
-
-    def setWidget(self, widget):
-        self.spanel.setWidget(widget)
-
-    def setScrollPosition(self, position):
-        self.spanel.setScrollPosition(position)
-
-    def scrollToBottom(self):
-        self.setScrollPosition(self.spanel.getElement().scrollHeight)
-
-
-class EmptyWidget(DropCell, SimplePanel):
-    """Empty dropable panel"""
-
-    def __init__(self, host):
-        SimplePanel.__init__(self)
-        DropCell.__init__(self, host)
-        #self.setWidget(HTML(''))
-        self.setSize('100%', '100%')
-
-
-class BorderWidget(EmptyWidget):
-    def __init__(self, host):
-        EmptyWidget.__init__(self, host)
-        self.addStyleName('borderPanel')
-
-
-class LeftBorderWidget(BorderWidget):
-    def __init__(self, host):
-        BorderWidget.__init__(self, host)
-        self.addStyleName('leftBorderWidget')
-
-
-class RightBorderWidget(BorderWidget):
-    def __init__(self, host):
-        BorderWidget.__init__(self, host)
-        self.addStyleName('rightBorderWidget')
-
-
-class BottomBorderWidget(BorderWidget):
-    def __init__(self, host):
-        BorderWidget.__init__(self, host)
-        self.addStyleName('bottomBorderWidget')
-
-
-class WidgetsPanel(ScrollPanelWrapper):
-
-    def __init__(self, host, locked=False):
-        ScrollPanelWrapper.__init__(self)
-        self.setSize('100%', '100%')
-        self.host = host
-        self.locked = locked  # if True: tab will not be removed when there are no more widgets inside
-        self.selected = None
-        self.flextable = FlexTable()
-        self.flextable.setSize('100%', '100%')
-        self.setWidget(self.flextable)
-        self.setStyleName('widgetsPanel')
-        _bottom = BottomBorderWidget(self.host)
-        self.flextable.setWidget(0, 0, _bottom)  # There will be always an Empty widget on the last row,
-                                                 # dropping a widget there will add a new row
-        td_elt = _bottom.getElement().parentNode
-        DOM.setStyleAttribute(td_elt, "height", "1px")  # needed so the cell adapt to the size of the border (specially in webkit)
-        self._max_cols = 1  # give the maximum number of columns i a raw
-
-    def isLocked(self):
-        return self.locked
-
-    def changeWidget(self, row, col, wid):
-        """Change the widget in the given location, add row or columns when necessary"""
-        log.debug("changing widget: %s %s %s" % (wid.getDebugName(), row, col))
-        last_row = max(0, self.flextable.getRowCount() - 1)
-        try:
-            prev_wid = self.flextable.getWidget(row, col)
-        except:
-            log.error("Trying to change an unexisting widget !")
-            return
-
-        cellFormatter = self.flextable.getFlexCellFormatter()
-
-        if isinstance(prev_wid, BorderWidget):
-            # We are on a border, we must create a row and/or columns
-            log.debug("BORDER WIDGET")
-            prev_wid.removeStyleName('dragover')
-
-            if isinstance(prev_wid, BottomBorderWidget):
-                # We are on the bottom border, we create a new row
-                self.flextable.insertRow(last_row)
-                self.flextable.setWidget(last_row, 0, LeftBorderWidget(self.host))
-                self.flextable.setWidget(last_row, 1, wid)
-                self.flextable.setWidget(last_row, 2, RightBorderWidget(self.host))
-                cellFormatter.setHorizontalAlignment(last_row, 2, HasAlignment.ALIGN_RIGHT)
-                row = last_row
-
-            elif isinstance(prev_wid, LeftBorderWidget):
-                if col != 0:
-                    log.error("LeftBorderWidget must be on the first column !")
-                    return
-                self.flextable.insertCell(row, col + 1)
-                self.flextable.setWidget(row, 1, wid)
-
-            elif isinstance(prev_wid, RightBorderWidget):
-                if col != self.flextable.getCellCount(row) - 1:
-                    log.error("RightBorderWidget must be on the last column !")
-                    return
-                self.flextable.insertCell(row, col)
-                self.flextable.setWidget(row, col, wid)
-
-        else:
-            prev_wid.removeFromParent()
-            self.flextable.setWidget(row, col, wid)
-
-        _max_cols = max(self._max_cols, self.flextable.getCellCount(row))
-        if _max_cols != self._max_cols:
-            self._max_cols = _max_cols
-            self._sizesAdjust()
-
-    def _sizesAdjust(self):
-        cellFormatter = self.flextable.getFlexCellFormatter()
-        width = 100.0 / max(1, self._max_cols - 2)  # we don't count the borders
-
-        for row_idx in xrange(self.flextable.getRowCount()):
-            for col_idx in xrange(self.flextable.getCellCount(row_idx)):
-                _widget = self.flextable.getWidget(row_idx, col_idx)
-                if not isinstance(_widget, BorderWidget):
-                    td_elt = _widget.getElement().parentNode
-                    DOM.setStyleAttribute(td_elt, "width", "%.2f%%" % width)
-
-        last_row = max(0, self.flextable.getRowCount() - 1)
-        cellFormatter.setColSpan(last_row, 0, self._max_cols)
-
-    def addWidget(self, wid):
-        """Add a widget to a new cell on the next to last row"""
-        last_row = max(0, self.flextable.getRowCount() - 1)
-        log.debug("putting widget %s at %d, %d" % (wid.getDebugName(), last_row, 0))
-        self.changeWidget(last_row, 0, wid)
-
-    def removeWidget(self, wid):
-        """Remove a widget and the cell where it is"""
-        _row, _col = self.flextable.getIndex(wid)
-        self.flextable.remove(wid)
-        self.flextable.removeCell(_row, _col)
-        if not self.getLiberviaRowWidgets(_row):  # we have no more widgets, we remove the row
-            self.flextable.removeRow(_row)
-        _max_cols = 1
-        for row_idx in xrange(self.flextable.getRowCount()):
-            _max_cols = max(_max_cols, self.flextable.getCellCount(row_idx))
-        if _max_cols != self._max_cols:
-            self._max_cols = _max_cols
-            self._sizesAdjust()
-        current = self
-
-        blank_page = self.getLiberviaWidgetsCount() == 0  # do we still have widgets on the page ?
-
-        if blank_page and not self.isLocked():
-            # we now notice the MainTabPanel that the WidgetsPanel is empty and need to be removed
-            while current is not None:
-                if isinstance(current, MainTabPanel):
-                    current.onWidgetPanelRemove(self)
-                    return
-                current = current.getParent()
-            log.error("no MainTabPanel found !")
-
-    def getWidgetCoords(self, wid):
-        return self.flextable.getIndex(wid)
-
-    def getLiberviaRowWidgets(self, row):
-        """ Return all the LiberviaWidget in the row """
-        return [wid for wid in self.getRowWidgets(row) if isinstance(wid, LiberviaWidget)]
-
-    def getRowWidgets(self, row):
-        """ Return all the widgets in the row """
-        widgets = []
-        cols = self.flextable.getCellCount(row)
-        for col in xrange(cols):
-            widgets.append(self.flextable.getWidget(row, col))
-        return widgets
-
-    def getLiberviaWidgetsCount(self):
-        """ Get count of contained widgets """
-        return len([wid for wid in self.flextable if isinstance(wid, LiberviaWidget)])
-
-    def getIndex(self, wid):
-        return self.flextable.getIndex(wid)
-
-    def getColSpan(self, row, col):
-        cellFormatter = self.flextable.getFlexCellFormatter()
-        return cellFormatter.getColSpan(row, col)
-
-    def setColSpan(self, row, col, value):
-        cellFormatter = self.flextable.getFlexCellFormatter()
-        return cellFormatter.setColSpan(row, col, value)
-
-    def getRowSpan(self, row, col):
-        cellFormatter = self.flextable.getFlexCellFormatter()
-        return cellFormatter.getRowSpan(row, col)
-
-    def setRowSpan(self, row, col, value):
-        cellFormatter = self.flextable.getFlexCellFormatter()
-        return cellFormatter.setRowSpan(row, col, value)
-
-
-class DropTab(Label, DropWidget):
-
-    def __init__(self, tab_panel, text):
-        Label.__init__(self, text)
-        DropWidget.__init__(self, tab_panel)
-        self.tab_panel = tab_panel
-        self.setStyleName('dropCell')
-        self.setWordWrap(False)
-        DOM.setStyleAttribute(self.getElement(), "min-width", "30px")
-
-    def _getIndex(self):
-        """ get current index of the DropTab """
-        # XXX: awful hack, but seems the only way to get index
-        return self.tab_panel.tabBar.panel.getWidgetIndex(self.getParent().getParent()) - 1
-
-    def onDragEnter(self, event):
-        #if self == LiberviaDragWidget.current:
-        #    return
-        self.addStyleName('dragover')
-        DOM.eventPreventDefault(event)
-
-    def onDragLeave(self, event):
-        self.removeStyleName('dragover')
-
-    def onDragOver(self, event):
-        DOM.eventPreventDefault(event)
-
-    def onDrop(self, event):
-        DOM.eventPreventDefault(event)
-        self.removeStyleName('dragover')
-        if self._getIndex() == self.tab_panel.tabBar.getSelectedTab():
-            # the widget come from the DragTab, so nothing to do, we let it there
-            return
-
-        # FIXME: quite the same stuff as in DropCell, need some factorisation
-        dt = event.dataTransfer
-        # 'text', 'text/plain', and 'Text' are equivalent.
-        try:
-            item, item_type = dt.getData("text/plain").split('\n')  # Workaround for webkit, only text/plain seems to be managed
-            if item_type and item_type[-1] == '\0':  # Workaround for what looks like a pyjamas bug: the \0 should not be there, and
-                item_type = item_type[:-1]           # .strip('\0') and .replace('\0','') don't work. TODO: check this and fill a bug report
-            # item_type = dt.getData("type")
-            log.debug("message: %s" % item)
-            log.debug("type: %s" % item_type)
-        except:
-            log.debug("no message found")
-            item = '&nbsp;'
-            item_type = None
-        if item_type == "WIDGET":
-            if not LiberviaDragWidget.current:
-                log.error("No widget registered in LiberviaDragWidget !")
-                return
-            _new_panel = LiberviaDragWidget.current
-            _new_panel.getWidgetsPanel().removeWidget(_new_panel)
-        elif item_type in DropCell.drop_keys:
-            _new_panel = DropCell.drop_keys[item_type](self.tab_panel.host, item)
-        else:
-            log.warning("unmanaged item type")
-            return
-
-        widgets_panel = self.tab_panel.getWidget(self._getIndex())
-        widgets_panel.addWidget(_new_panel)
-
-
-class MainTabPanel(TabPanel):
-
-    def __init__(self, host):
-        TabPanel.__init__(self)
-        self.host = host
-        self.tabBar.setVisible(False)
-        self.setStyleName('liberviaTabPanel')
-        self.addStyleName('mainTabPanel')
-        Window.addWindowResizeListener(self)
-
-    def getCurrentPanel(self):
-        """ Get the panel of the currently selected tab """
-        return self.deck.visibleWidget
-
-    def onWindowResized(self, width, height):
-        tab_panel_elt = self.getElement()
-        _elts = doc().getElementsByClassName('gwt-TabBar')
-        if not _elts.length:
-            log.error("no TabBar found, it should exist !")
-            tab_bar_h = 0
-        else:
-            tab_bar_h = _elts.item(0).offsetHeight
-        ideal_height = height - DOM.getAbsoluteTop(tab_panel_elt) - tab_bar_h - 5
-        ideal_width = width - DOM.getAbsoluteLeft(tab_panel_elt) - 5
-        self.setWidth("%s%s" % (ideal_width, "px"))
-        self.setHeight("%s%s" % (ideal_height, "px"))
-
-    def add(self, widget, text=''):
-        tab = DropTab(self, text)
-        TabPanel.add(self, widget, tab, False)
-        if self.getWidgetCount() > 1:
-            self.tabBar.setVisible(True)
-            self.host.resize()
-
-    def onWidgetPanelRemove(self, panel):
-        """ Called when a child WidgetsPanel is empty and need to be removed """
-        self.remove(panel)
-        widgets_count = self.getWidgetCount()
-        if widgets_count == 1:
-            self.tabBar.setVisible(False)
-            self.host.resize()
-            self.selectTab(0)
-        else:
-            self.selectTab(widgets_count - 1)
+    def getCategoryHTML(cls, category):
+        return cls.ITEM_TPL % category.icon