def __init__(self, app):
        super(SamplerWindow, self).__init__()

        self._app = app

        self._currentList = FeatureGrid(self._app)
        self._featureView = FeatureView()
        self._currentFeature = ObjectProperty(None, Feature)

        self._mainSplit = None
        self._navigationTree = None
#        self._webAnalytics = GoogleAnalytics('UA-658457-6', 'none')
        # "backbutton"
        self._uriFragmentUtility = UriFragmentUtility()

        # breadcrumbs
        self._breadcrumbs = BreadCrumbs(self)

        self._previousSample = None
        self._nextSample = None
        self._search = None
        self.theme = None

        # Main top/expanded-bottom layout
        mainExpand = VerticalLayout()
        self.setContent(mainExpand)
        self.setSizeFull()
        mainExpand.setSizeFull()
        self.setCaption(self._TITLE)
        self.setTheme(self._app._currentApplicationTheme)

        # topbar (navigation)
        nav = HorizontalLayout()
        mainExpand.addComponent(nav)
        nav.setHeight('44px')
        nav.setWidth('100%')
        nav.setStyleName('topbar')
        nav.setSpacing(True)
        nav.setMargin(False, True, False, False)

        # Upper left logo
        logo = self.createLogo()
        nav.addComponent(logo)
        nav.setComponentAlignment(logo, Alignment.MIDDLE_LEFT)

        # Breadcrumbs
        nav.addComponent(self._breadcrumbs)
        nav.setExpandRatio(self._breadcrumbs, 1)
        nav.setComponentAlignment(self._breadcrumbs, Alignment.MIDDLE_LEFT)

        # invisible analytics -component
#        nav.addComponent(self._webAnalytics)

        # "backbutton"
        nav.addComponent(self._uriFragmentUtility)

        self._uriFragmentUtility.addListener(UriListener(self),
                IFragmentChangedListener)

        # Main left/right split; hidden menu tree
        self._mainSplit = HorizontalSplitPanel()
        self._mainSplit.setSizeFull()
        self._mainSplit.setStyleName('main-split')
        mainExpand.addComponent(self._mainSplit)
        mainExpand.setExpandRatio(self._mainSplit, 1)

        # Select theme
        themeSelect = self.createThemeSelect()
        nav.addComponent(themeSelect)
        nav.setComponentAlignment(themeSelect, Alignment.MIDDLE_LEFT)

        # Layouts for top area buttons
        quicknav = HorizontalLayout()
        arrows = HorizontalLayout()
        nav.addComponent(quicknav)
        nav.addComponent(arrows)
        nav.setComponentAlignment(quicknav, Alignment.MIDDLE_LEFT)
        nav.setComponentAlignment(arrows, Alignment.MIDDLE_LEFT)
        quicknav.setStyleName('segment')
        arrows.setStyleName('segment')

        # Previous sample
        self._previousSample = self.createPrevButton()
        arrows.addComponent(self._previousSample)

        # Next sample
        self._nextSample = self.createNextButton()
        arrows.addComponent(self._nextSample)

        # "Search" combobox
        searchComponent = self.createSearch()
        quicknav.addComponent(searchComponent)

        # Menu tree, initially shown
        menuLayout = CssLayout()
        allSamples = ActiveLink('All Samples', ExternalResource('#'))
        menuLayout.addComponent(allSamples)
        self._navigationTree = self.createMenuTree()
        menuLayout.addComponent(self._navigationTree)
        self._mainSplit.setFirstComponent(menuLayout)

        # Show / hide tree
        treeSwitch = self.createTreeSwitch()
        quicknav.addComponent(treeSwitch)

        self.addListener(WindowCloseListener(self, self._app),
                window.ICloseListener)
        self.updateFeatureList(self._currentList)
Example #2
0
    def __init__(self, app):
        super(SamplerWindow, self).__init__()

        self._app = app

        self._currentList = FeatureGrid(self._app)
        self._featureView = FeatureView()
        self._currentFeature = ObjectProperty(None, Feature)

        self._mainSplit = None
        self._navigationTree = None
        #        self._webAnalytics = GoogleAnalytics('UA-658457-6', 'none')
        # "backbutton"
        self._uriFragmentUtility = UriFragmentUtility()

        # breadcrumbs
        self._breadcrumbs = BreadCrumbs(self)

        self._previousSample = None
        self._nextSample = None
        self._search = None
        self.theme = None

        # Main top/expanded-bottom layout
        mainExpand = VerticalLayout()
        self.setContent(mainExpand)
        self.setSizeFull()
        mainExpand.setSizeFull()
        self.setCaption(self._TITLE)
        self.setTheme(self._app._currentApplicationTheme)

        # topbar (navigation)
        nav = HorizontalLayout()
        mainExpand.addComponent(nav)
        nav.setHeight('44px')
        nav.setWidth('100%')
        nav.setStyleName('topbar')
        nav.setSpacing(True)
        nav.setMargin(False, True, False, False)

        # Upper left logo
        logo = self.createLogo()
        nav.addComponent(logo)
        nav.setComponentAlignment(logo, Alignment.MIDDLE_LEFT)

        # Breadcrumbs
        nav.addComponent(self._breadcrumbs)
        nav.setExpandRatio(self._breadcrumbs, 1)
        nav.setComponentAlignment(self._breadcrumbs, Alignment.MIDDLE_LEFT)

        # invisible analytics -component
        #        nav.addComponent(self._webAnalytics)

        # "backbutton"
        nav.addComponent(self._uriFragmentUtility)

        self._uriFragmentUtility.addListener(UriListener(self),
                                             IFragmentChangedListener)

        # Main left/right split; hidden menu tree
        self._mainSplit = HorizontalSplitPanel()
        self._mainSplit.setSizeFull()
        self._mainSplit.setStyleName('main-split')
        mainExpand.addComponent(self._mainSplit)
        mainExpand.setExpandRatio(self._mainSplit, 1)

        # Select theme
        themeSelect = self.createThemeSelect()
        nav.addComponent(themeSelect)
        nav.setComponentAlignment(themeSelect, Alignment.MIDDLE_LEFT)

        # Layouts for top area buttons
        quicknav = HorizontalLayout()
        arrows = HorizontalLayout()
        nav.addComponent(quicknav)
        nav.addComponent(arrows)
        nav.setComponentAlignment(quicknav, Alignment.MIDDLE_LEFT)
        nav.setComponentAlignment(arrows, Alignment.MIDDLE_LEFT)
        quicknav.setStyleName('segment')
        arrows.setStyleName('segment')

        # Previous sample
        self._previousSample = self.createPrevButton()
        arrows.addComponent(self._previousSample)

        # Next sample
        self._nextSample = self.createNextButton()
        arrows.addComponent(self._nextSample)

        # "Search" combobox
        searchComponent = self.createSearch()
        quicknav.addComponent(searchComponent)

        # Menu tree, initially shown
        menuLayout = CssLayout()
        allSamples = ActiveLink('All Samples', ExternalResource('#'))
        menuLayout.addComponent(allSamples)
        self._navigationTree = self.createMenuTree()
        menuLayout.addComponent(self._navigationTree)
        self._mainSplit.setFirstComponent(menuLayout)

        # Show / hide tree
        treeSwitch = self.createTreeSwitch()
        quicknav.addComponent(treeSwitch)

        self.addListener(WindowCloseListener(self, self._app),
                         window.ICloseListener)
        self.updateFeatureList(self._currentList)
class SamplerWindow(Window):
    """The main window for Sampler, contains the full application UI."""

    _TITLE = 'Muntjac Sampler'

    def __init__(self, app):
        super(SamplerWindow, self).__init__()

        self._app = app

        self._currentList = FeatureGrid(self._app)
        self._featureView = FeatureView()
        self._currentFeature = ObjectProperty(None, Feature)

        self._mainSplit = None
        self._navigationTree = None
#        self._webAnalytics = GoogleAnalytics('UA-658457-6', 'none')
        # "backbutton"
        self._uriFragmentUtility = UriFragmentUtility()

        # breadcrumbs
        self._breadcrumbs = BreadCrumbs(self)

        self._previousSample = None
        self._nextSample = None
        self._search = None
        self.theme = None

        # Main top/expanded-bottom layout
        mainExpand = VerticalLayout()
        self.setContent(mainExpand)
        self.setSizeFull()
        mainExpand.setSizeFull()
        self.setCaption(self._TITLE)
        self.setTheme(self._app._currentApplicationTheme)

        # topbar (navigation)
        nav = HorizontalLayout()
        mainExpand.addComponent(nav)
        nav.setHeight('44px')
        nav.setWidth('100%')
        nav.setStyleName('topbar')
        nav.setSpacing(True)
        nav.setMargin(False, True, False, False)

        # Upper left logo
        logo = self.createLogo()
        nav.addComponent(logo)
        nav.setComponentAlignment(logo, Alignment.MIDDLE_LEFT)

        # Breadcrumbs
        nav.addComponent(self._breadcrumbs)
        nav.setExpandRatio(self._breadcrumbs, 1)
        nav.setComponentAlignment(self._breadcrumbs, Alignment.MIDDLE_LEFT)

        # invisible analytics -component
#        nav.addComponent(self._webAnalytics)

        # "backbutton"
        nav.addComponent(self._uriFragmentUtility)

        self._uriFragmentUtility.addListener(UriListener(self),
                IFragmentChangedListener)

        # Main left/right split; hidden menu tree
        self._mainSplit = HorizontalSplitPanel()
        self._mainSplit.setSizeFull()
        self._mainSplit.setStyleName('main-split')
        mainExpand.addComponent(self._mainSplit)
        mainExpand.setExpandRatio(self._mainSplit, 1)

        # Select theme
        themeSelect = self.createThemeSelect()
        nav.addComponent(themeSelect)
        nav.setComponentAlignment(themeSelect, Alignment.MIDDLE_LEFT)

        # Layouts for top area buttons
        quicknav = HorizontalLayout()
        arrows = HorizontalLayout()
        nav.addComponent(quicknav)
        nav.addComponent(arrows)
        nav.setComponentAlignment(quicknav, Alignment.MIDDLE_LEFT)
        nav.setComponentAlignment(arrows, Alignment.MIDDLE_LEFT)
        quicknav.setStyleName('segment')
        arrows.setStyleName('segment')

        # Previous sample
        self._previousSample = self.createPrevButton()
        arrows.addComponent(self._previousSample)

        # Next sample
        self._nextSample = self.createNextButton()
        arrows.addComponent(self._nextSample)

        # "Search" combobox
        searchComponent = self.createSearch()
        quicknav.addComponent(searchComponent)

        # Menu tree, initially shown
        menuLayout = CssLayout()
        allSamples = ActiveLink('All Samples', ExternalResource('#'))
        menuLayout.addComponent(allSamples)
        self._navigationTree = self.createMenuTree()
        menuLayout.addComponent(self._navigationTree)
        self._mainSplit.setFirstComponent(menuLayout)

        # Show / hide tree
        treeSwitch = self.createTreeSwitch()
        quicknav.addComponent(treeSwitch)

        self.addListener(WindowCloseListener(self, self._app),
                window.ICloseListener)
        self.updateFeatureList(self._currentList)


    def detach(self):
        super(SamplerWindow, self).detach()
        self._search.setContainerDataSource(None)
        self._navigationTree.setContainerDataSource(None)


    def removeSubwindows(self):
        wins = self.getChildWindows()
        if None is not wins:
            for w in wins:
                self.removeWindow(w)


    def setFeature(self, arg):
        """Displays a Feature(Set) or displays a Feature(Set) matching the
        given path, or the main view if no matching Feature(Set) is found.

        @param arg:
                   Either the Feature(Set) to show or the path of the
                   Feature(Set) to show
        """
        if isinstance(arg, basestring):
            path = arg
            f = FeatureSet.FEATURES.getFeature(path)
            self.setFeature(f)
        else:
            f = arg
            if f == FeatureSet.FEATURES:
                # "All" is no longer in the tree, use null instead
                f = None
            self._currentFeature.setValue(f)
            fragment = f.getFragmentName() if f is not None else ''

#            self._webAnalytics.trackPageview(fragment)
            self._uriFragmentUtility.setFragment(fragment, False)
            self._breadcrumbs.setPath( self._app.getFullPathFor(f) )

            self._previousSample.setEnabled(f is not None)
            self._nextSample.setEnabled(not self._app._allFeatures.isLastId(f))

            self.updateFeatureList(self._currentList)

            self.setCaption((f.getName() + ': ' if f is not None else '')
                    + self._TITLE)

    # SamplerWindow helpers

    def createSearch(self):
        self._search = ComboBox()
        self._search.setWidth('160px')
        self._search.setNewItemsAllowed(False)
        self._search.setFilteringMode(ComboBox.FILTERINGMODE_CONTAINS)
        self._search.setNullSelectionAllowed(True)
        self._search.setImmediate(True)
        self._search.setInputPrompt('Search samples...')
        self._search.setContainerDataSource( self._app._allFeatures )

        for idd in self._app._allFeatures.getItemIds():
            if isinstance(idd, FeatureSet):
                pass  # FIXME: 'SamplerApplication' has no attribute 'getResourceAsStream'
#                self._search.setItemIcon(idd,
#                        ClassResource('folder.gif', self._app))

        self._search.addListener(SearchListener(self),
                prop.IValueChangeListener)

        # TODO add icons for section/sample
        # PopupView pv = new PopupView("", search) { public void
        # changeVariables(Object source, Map variables) {
        # super.changeVariables(source, variables); if (isPopupVisible()) {
        # search.focus(); } } };

        pv = PopupView('<span></span>', self._search)

        pv.addListener(PopupListener(self),
                IPopupVisibilityListener)
        pv.setStyleName('quickjump')
        pv.setDescription('Quick jump')

        return pv


    def createThemeSelect(self):
        self.theme = ComboBox()
        self.theme.setWidth('32px')
        self.theme.setNewItemsAllowed(False)
        self.theme.setFilteringMode(ComboBox.FILTERINGMODE_CONTAINS)
        self.theme.setImmediate(True)
        self.theme.setNullSelectionAllowed(False)
        for themeName in self._app._THEMES:
            idd = self._app._SAMPLER_THEME_NAME + '-' + themeName
            self.theme.addItem(idd)
            self.theme.setItemCaption(idd,
                    themeName[:1].upper() + (themeName[1:]) + ' theme')
            self.theme.setItemIcon(idd, _EMPTY_THEME_ICON)
        currentWindowTheme = self.getTheme()
        self.theme.setValue(currentWindowTheme)
        self.theme.setItemIcon(currentWindowTheme, _SELECTED_THEME_ICON)

        self.theme.addListener(ThemeChangeListener(self, self._app),
                prop.IValueChangeListener)
        self.theme.setStyleName('theme-select')
        self.theme.setDescription('Select Theme')
        return self.theme


    def createLogo(self):
        logo = NativeButton('', LogoClickListener(self))
        logo.setDescription('Home')
        logo.setStyleName(BaseTheme.BUTTON_LINK)
        logo.addStyleName('logo')
        return logo


    def createNextButton(self):
        b = NativeButton('', NextClickListener(self, self._app))
        b.setStyleName('next')
        b.setDescription('Jump to the next sample')
        return b


    def createPrevButton(self):
        b = NativeButton('', PrevClickListener(self, self._app))
        b.setEnabled(False)
        b.setStyleName('previous')
        b.setDescription('Jump to the previous sample')
        return b


    def createTreeSwitch(self):
        b = NativeButton()
        b.setStyleName('tree-switch')
        b.addStyleName('down')
        b.setDescription('Toggle sample tree visibility')

        b.addListener(TreeClickListener(self),
                button.IClickListener)
        self._mainSplit.setSplitPosition(250, ISizeable.UNITS_PIXELS)
        return b


    def createMenuTree(self):
        tree = Tree()
        tree.setImmediate(True)
        tree.setStyleName('menu')
        tree.setContainerDataSource(self._app._allFeatures)

        self._currentFeature.addListener(FeatureChangeListener(self, tree),
                prop.IValueChangeListener)
        for f in FeatureSet.FEATURES.getFeatures():
            tree.expandItemsRecursively(f)
        tree.expandItemsRecursively(FeatureSet.FEATURES)

        tree.addListener(TreeChangeListener(self),
                prop.IValueChangeListener)

        tree.setItemStyleGenerator(TreeStyleGenerator())
        return tree


    def updateFeatureList(self, lst):
        self._currentList = lst
        val = self._currentFeature.getValue()
        if val is None:
            self._currentList.setFeatureContainer(self._app._allFeatures)
            self._mainSplit.setSecondComponent(self._currentList)
        elif isinstance(val, FeatureSet):
            self._currentList.setFeatureContainer(val.getContainer(True))
            self._mainSplit.setSecondComponent(self._currentList)
        else:
            self._mainSplit.setSecondComponent(self._featureView)
            self._featureView.setFeature(val)
Example #4
0
class SamplerWindow(Window):
    """The main window for Sampler, contains the full application UI."""

    _TITLE = 'Muntjac Sampler'

    def __init__(self, app):
        super(SamplerWindow, self).__init__()

        self._app = app

        self._currentList = FeatureGrid(self._app)
        self._featureView = FeatureView()
        self._currentFeature = ObjectProperty(None, Feature)

        self._mainSplit = None
        self._navigationTree = None
        #        self._webAnalytics = GoogleAnalytics('UA-658457-6', 'none')
        # "backbutton"
        self._uriFragmentUtility = UriFragmentUtility()

        # breadcrumbs
        self._breadcrumbs = BreadCrumbs(self)

        self._previousSample = None
        self._nextSample = None
        self._search = None
        self.theme = None

        # Main top/expanded-bottom layout
        mainExpand = VerticalLayout()
        self.setContent(mainExpand)
        self.setSizeFull()
        mainExpand.setSizeFull()
        self.setCaption(self._TITLE)
        self.setTheme(self._app._currentApplicationTheme)

        # topbar (navigation)
        nav = HorizontalLayout()
        mainExpand.addComponent(nav)
        nav.setHeight('44px')
        nav.setWidth('100%')
        nav.setStyleName('topbar')
        nav.setSpacing(True)
        nav.setMargin(False, True, False, False)

        # Upper left logo
        logo = self.createLogo()
        nav.addComponent(logo)
        nav.setComponentAlignment(logo, Alignment.MIDDLE_LEFT)

        # Breadcrumbs
        nav.addComponent(self._breadcrumbs)
        nav.setExpandRatio(self._breadcrumbs, 1)
        nav.setComponentAlignment(self._breadcrumbs, Alignment.MIDDLE_LEFT)

        # invisible analytics -component
        #        nav.addComponent(self._webAnalytics)

        # "backbutton"
        nav.addComponent(self._uriFragmentUtility)

        self._uriFragmentUtility.addListener(UriListener(self),
                                             IFragmentChangedListener)

        # Main left/right split; hidden menu tree
        self._mainSplit = HorizontalSplitPanel()
        self._mainSplit.setSizeFull()
        self._mainSplit.setStyleName('main-split')
        mainExpand.addComponent(self._mainSplit)
        mainExpand.setExpandRatio(self._mainSplit, 1)

        # Select theme
        themeSelect = self.createThemeSelect()
        nav.addComponent(themeSelect)
        nav.setComponentAlignment(themeSelect, Alignment.MIDDLE_LEFT)

        # Layouts for top area buttons
        quicknav = HorizontalLayout()
        arrows = HorizontalLayout()
        nav.addComponent(quicknav)
        nav.addComponent(arrows)
        nav.setComponentAlignment(quicknav, Alignment.MIDDLE_LEFT)
        nav.setComponentAlignment(arrows, Alignment.MIDDLE_LEFT)
        quicknav.setStyleName('segment')
        arrows.setStyleName('segment')

        # Previous sample
        self._previousSample = self.createPrevButton()
        arrows.addComponent(self._previousSample)

        # Next sample
        self._nextSample = self.createNextButton()
        arrows.addComponent(self._nextSample)

        # "Search" combobox
        searchComponent = self.createSearch()
        quicknav.addComponent(searchComponent)

        # Menu tree, initially shown
        menuLayout = CssLayout()
        allSamples = ActiveLink('All Samples', ExternalResource('#'))
        menuLayout.addComponent(allSamples)
        self._navigationTree = self.createMenuTree()
        menuLayout.addComponent(self._navigationTree)
        self._mainSplit.setFirstComponent(menuLayout)

        # Show / hide tree
        treeSwitch = self.createTreeSwitch()
        quicknav.addComponent(treeSwitch)

        self.addListener(WindowCloseListener(self, self._app),
                         window.ICloseListener)
        self.updateFeatureList(self._currentList)

    def detach(self):
        super(SamplerWindow, self).detach()
        self._search.setContainerDataSource(None)
        self._navigationTree.setContainerDataSource(None)

    def removeSubwindows(self):
        wins = self.getChildWindows()
        if None is not wins:
            for w in wins:
                self.removeWindow(w)

    def setFeature(self, arg):
        """Displays a Feature(Set) or displays a Feature(Set) matching the
        given path, or the main view if no matching Feature(Set) is found.

        @param arg:
                   Either the Feature(Set) to show or the path of the
                   Feature(Set) to show
        """
        if isinstance(arg, basestring):
            path = arg
            f = FeatureSet.FEATURES.getFeature(path)
            self.setFeature(f)
        else:
            f = arg
            if f == FeatureSet.FEATURES:
                # "All" is no longer in the tree, use null instead
                f = None
            self._currentFeature.setValue(f)
            fragment = f.getFragmentName() if f is not None else ''

            #            self._webAnalytics.trackPageview(fragment)
            self._uriFragmentUtility.setFragment(fragment, False)
            self._breadcrumbs.setPath(self._app.getFullPathFor(f))

            self._previousSample.setEnabled(f is not None)
            self._nextSample.setEnabled(not self._app._allFeatures.isLastId(f))

            self.updateFeatureList(self._currentList)

            self.setCaption((f.getName() + ': ' if f is not None else '') +
                            self._TITLE)

    # SamplerWindow helpers

    def createSearch(self):
        self._search = ComboBox()
        self._search.setWidth('160px')
        self._search.setNewItemsAllowed(False)
        self._search.setFilteringMode(ComboBox.FILTERINGMODE_CONTAINS)
        self._search.setNullSelectionAllowed(True)
        self._search.setImmediate(True)
        self._search.setInputPrompt('Search samples...')
        self._search.setContainerDataSource(self._app._allFeatures)

        for idd in self._app._allFeatures.getItemIds():
            if isinstance(idd, FeatureSet):
                pass  # FIXME: 'SamplerApplication' has no attribute 'getResourceAsStream'


#                self._search.setItemIcon(idd,
#                        ClassResource('folder.gif', self._app))

        self._search.addListener(SearchListener(self),
                                 prop.IValueChangeListener)

        # TODO add icons for section/sample
        # PopupView pv = new PopupView("", search) { public void
        # changeVariables(Object source, Map variables) {
        # super.changeVariables(source, variables); if (isPopupVisible()) {
        # search.focus(); } } };

        pv = PopupView('<span></span>', self._search)

        pv.addListener(PopupListener(self), IPopupVisibilityListener)
        pv.setStyleName('quickjump')
        pv.setDescription('Quick jump')

        return pv

    def createThemeSelect(self):
        self.theme = ComboBox()
        self.theme.setWidth('32px')
        self.theme.setNewItemsAllowed(False)
        self.theme.setFilteringMode(ComboBox.FILTERINGMODE_CONTAINS)
        self.theme.setImmediate(True)
        self.theme.setNullSelectionAllowed(False)
        for themeName in self._app._THEMES:
            idd = self._app._SAMPLER_THEME_NAME + '-' + themeName
            self.theme.addItem(idd)
            self.theme.setItemCaption(
                idd, themeName[:1].upper() + (themeName[1:]) + ' theme')
            self.theme.setItemIcon(idd, _EMPTY_THEME_ICON)
        currentWindowTheme = self.getTheme()
        self.theme.setValue(currentWindowTheme)
        self.theme.setItemIcon(currentWindowTheme, _SELECTED_THEME_ICON)

        self.theme.addListener(ThemeChangeListener(self, self._app),
                               prop.IValueChangeListener)
        self.theme.setStyleName('theme-select')
        self.theme.setDescription('Select Theme')
        return self.theme

    def createLogo(self):
        logo = NativeButton('', LogoClickListener(self))
        logo.setDescription('Home')
        logo.setStyleName(BaseTheme.BUTTON_LINK)
        logo.addStyleName('logo')
        return logo

    def createNextButton(self):
        b = NativeButton('', NextClickListener(self, self._app))
        b.setStyleName('next')
        b.setDescription('Jump to the next sample')
        return b

    def createPrevButton(self):
        b = NativeButton('', PrevClickListener(self, self._app))
        b.setEnabled(False)
        b.setStyleName('previous')
        b.setDescription('Jump to the previous sample')
        return b

    def createTreeSwitch(self):
        b = NativeButton()
        b.setStyleName('tree-switch')
        b.addStyleName('down')
        b.setDescription('Toggle sample tree visibility')

        b.addListener(TreeClickListener(self), button.IClickListener)
        self._mainSplit.setSplitPosition(250, ISizeable.UNITS_PIXELS)
        return b

    def createMenuTree(self):
        tree = Tree()
        tree.setImmediate(True)
        tree.setStyleName('menu')
        tree.setContainerDataSource(self._app._allFeatures)

        self._currentFeature.addListener(FeatureChangeListener(self, tree),
                                         prop.IValueChangeListener)
        for f in FeatureSet.FEATURES.getFeatures():
            tree.expandItemsRecursively(f)
        tree.expandItemsRecursively(FeatureSet.FEATURES)

        tree.addListener(TreeChangeListener(self), prop.IValueChangeListener)

        tree.setItemStyleGenerator(TreeStyleGenerator())
        return tree

    def updateFeatureList(self, lst):
        self._currentList = lst
        val = self._currentFeature.getValue()
        if val is None:
            self._currentList.setFeatureContainer(self._app._allFeatures)
            self._mainSplit.setSecondComponent(self._currentList)
        elif isinstance(val, FeatureSet):
            self._currentList.setFeatureContainer(val.getContainer(True))
            self._mainSplit.setSecondComponent(self._currentList)
        else:
            self._mainSplit.setSecondComponent(self._featureView)
            self._featureView.setFeature(val)