Examples of com.vaadin.ui.Tree$ItemStyleGenerator

com.vaadin.ui.Tree
ItemStyleGenerator can be used to add custom styles to tree items. The CSS class name that will be added to the cell content is v-tree-node-[style name].

    private NavigationPanelListener listener;


    private final Tree tree;


    public NavigationPanelView() {
        tree = new Tree();
    }

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        VerticalLayout pl = new VerticalLayout();
        pl.setMargin(true);
        Panel p = new Panel("Tree test", pl);
        p.setSizeFull();


        Tree t = new Tree();


        t.addItem("Foo");
        t.addItem("Bar");


        final VerticalLayout events = new VerticalLayout();


        t.addListener(new ItemClickEvent.ItemClickListener() {
            @Override
            public void itemClick(ItemClickEvent event) {
                events.addComponent(new Label(new Label("Click:"
                        + (event.isDoubleClick() ? "double" : "single")
                        + " button:" + event.getButtonName() + " propertyId:"

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        return new Label("<b>Components without a test:</B><br/>"
                + missingTests, ContentMode.HTML);
    }


    private Component createMenu() {
        naviTree = new Tree();
        naviTree.setItemStyleGenerator(new ItemStyleGenerator() {


            @Override
            public String getStyle(Tree source, Object itemId) {
                Class<?> cls = (Class<?>) itemId;

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        smi = mi.addItem("Item", icon, null);
        smi = smi.addItem("Item", icon, null);
        gl.addComponent(menu);


        // Tree, caption + item + subitem + action icons
        Tree tree = new Tree("Tree");
        tree.addItem("Root");
        tree.setItemIcon("Root", icon);
        tree.addItem("Leaf");
        tree.setItemIcon("Leaf", icon);
        tree.setParent("Leaf", "Root");
        tree.expandItemsRecursively("Root");
        tree.addActionHandler(actionHandler);
        gl.addComponent(tree);


        // All of FontAwesome
        String allIcons = "";
        for (FontIcon ic : FontAwesome.values()) {

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        main.addComponent(new Label(
                "Some test cases for trees. Events panel logs events that happen server side."));


        main.addComponent(new Button("commit"));


        Tree t;


        t = createTestTree();
        t.setCaption("Default settings");
        main.addComponent(createTestBench(t));


        t = createTestTree();
        t.setCaption("Multiselect settings");
        t.setMultiSelect(true);
        main.addComponent(createTestBench(t));


        t = createTestTree();
        t.setCaption("Multiselect and immediate");
        t.setImmediate(true);
        t.setMultiSelect(true);
        main.addComponent(createTestBench(t));


        t = createTestTree();
        t.setCaption("immediate");
        t.setImmediate(true);
        main.addComponent(createTestBench(t));


        t = createTestTree();
        t.setCaption("with actions");
        t.setImmediate(true);
        t.addActionHandler(this);
        final AbstractOrderedLayout ol = (AbstractOrderedLayout) createTestBench(t);
        al = new VerticalLayout();
        al.setMargin(true);
        ol.addComponent(new Panel("action log", al));
        main.addComponent(ol);

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        main.addComponent(b);


    }


    public Tree createTestTree() {
        Tree t = new Tree("Tree");
        final String[] names = new String[100];
        for (int i = 0; i < names.length; i++) {
            names[i] = firstnames[(int) (Math.random() * (firstnames.length - 1))]
                    + " "
                    + lastnames[(int) (Math.random() * (lastnames.length - 1))];
        }


        // Create tree
        t = new Tree("Organization Structure");
        for (int i = 0; i < 100; i++) {
            t.addItem(names[i]);
            final String parent = names[(int) (Math.random() * (names.length - 1))];
            if (t.containsId(parent)) {
                t.setParent(names[i], parent);
            }
        }


        // Forbid childless people to have children (makes them leaves)
        for (int i = 0; i < 100; i++) {
            if (!t.hasChildren(names[i])) {
                t.setChildrenAllowed(names[i], false);
            }
        }
        return t;
    }

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        // setting either width or height fixes the issue
        // p.setWidth(500);
        // p.setHeight(800);


        // Tree with a few items
        tree = new Tree();
        tree.setImmediate(true);
        // we'll use a property for caption instead of the item id ("value"),
        // so that multiple items can have the same caption
        tree.addContainerProperty(CAPTION_PROPERTY, String.class, "");
        tree.setItemCaptionMode(AbstractSelect.ITEM_CAPTION_MODE_PROPERTY);

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        populateContainer(hier);


        // sort(indexedContainer);


        tree1 = new Tree("Tree with wrapped IndexedContainer");
        tree1.setContainerDataSource(hier);
        tree1.setItemCaptionPropertyId("name");
        for (Object id : hier.rootItemIds()) {
            tree1.expandItemsRecursively(id);
        }

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            s.addItem(name);
        }
    }


    public Tree createTestTree() {
        Tree t = new Tree("Tree");
        final String[] names = new String[100];
        for (int i = 0; i < names.length; i++) {
            names[i] = firstnames[(int) (Math.random() * (firstnames.length - 1))]
                    + " "
                    + lastnames[(int) (Math.random() * (lastnames.length - 1))];
        }


        // Create tree
        t = new Tree("Organization Structure");
        for (int i = 0; i < 100; i++) {
            t.addItem(names[i]);
            final String parent = names[(int) (Math.random() * (names.length - 1))];
            if (t.containsId(parent)) {
                t.setParent(names[i], parent);
            }
        }


        // Forbid childless people to have children (makes them leaves)
        for (int i = 0; i < 100; i++) {
            if (!t.hasChildren(names[i])) {
                t.setChildrenAllowed(names[i], false);
            }
        }
        return t;
    }

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        tt.setSelectable(true);
        tt.addContainerProperty("foo", String.class, "bar");
        tt.addItem();


        fields.add(tt);
        Tree tree = new Tree();
        tree.addItem("Item 1");
        fields.add(tree);
        fields.add(new TwinColSelect());
        fields.add(new PasswordField());
        fields.add(new TextField());
        fields.add(new TextArea());

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