Examples with TreeDataProvider com.vaadin.flow.data.provider.hierarchy.TreeDataProvider used on opensource projects

Example 1 with TreeDataProvider

use of com.vaadin.flow.data.provider.hierarchy.TreeDataProvider in project flow-components by vaadin.

the class TreeComponentColumnsPage method addTreeGrid.

private void addTreeGrid(boolean addGridBefore) {
    TreeGrid<String> grid = new TreeGrid<>();
    if (addGridBefore) {
        grid.setId("grid-then-comp");
        add(grid);
    }
    ComponentRenderer<TextField, String> componentRenderer = new ComponentRenderer<>(TextField::new, (component, item) -> {
        component.setReadOnly(true);
        component.setValue(item);
    });
    grid.addComponentHierarchyColumn(this::createTextField).setHeader("Header A").setId("textfield");
    grid.addColumn(componentRenderer).setHeader("Header B");
    ComponentRenderer<Button, String> componentRendererBtn = new ComponentRenderer<>(() -> new Button("btn"), ((button, s) -> {
        button.setText(s);
        button.setThemeName(ButtonVariant.LUMO_ERROR.getVariantName());
    }));
    grid.addColumn(componentRendererBtn).setHeader("Header C");
    TreeData<String> data = new TreeData<>();
    final Map<String, String> parentPathMap = new HashMap<>();
    addRootItems("Granddad", 3, data, parentPathMap).forEach(granddad -> addItems("Dad", 3, granddad, data, parentPathMap).forEach(dad -> addItems("Son", 100, dad, data, parentPathMap)));
    grid.setDataProvider(new TreeDataProvider<>(data));
    if (!addGridBefore) {
        grid.setId("comp-then-grid");
        add(grid);
    }
}

Example 2 with TreeDataProvider

use of com.vaadin.flow.data.provider.hierarchy.TreeDataProvider in project flow-components by vaadin.

the class GridBenchmark method setParameter.

@Override
public void setParameter(BeforeEvent event, @OptionalParameter String parameter) {
    Location location = event.getLocation();
    QueryParameters queryParameters = location.getQueryParameters();
    Map<String, List<String>> parametersMap = queryParameters.getParameters();
    if (!parametersMap.containsKey("variant") || !parametersMap.containsKey("metric")) {
        add(new Text("Provide query parameters: variant and metric"));
        return;
    }
    String metric = parametersMap.get("metric").get(0);
    String variant = parametersMap.get("variant").get(0);
    LoggerFactory.getLogger(GridBenchmark.class).info("Sample: " + variant + "-" + metric);
    switch(variant) {
        case "simple":
            grid = getGrid();
            addColumns(grid, 5, false);
            break;
        case "multicolumn":
            grid = getGrid();
            addColumns(grid, 50, false);
            break;
        case "componentrenderers":
            grid = getGrid();
            addColumns(grid, 5, true);
            break;
        case "detailsopened":
            grid = getGrid();
            addColumns(grid, 5, false);
            grid.setItemDetailsRenderer(new ComponentRenderer<>(item -> new Text(item.toString())));
            items.forEach(item -> grid.setDetailsVisible(item, true));
            break;
        case "tree":
            grid = getTreeGrid();
            ((TreeGrid<String>) grid).addHierarchyColumn(i -> i);
            addColumns(grid, 5, false);
            break;
        case "mixed":
            grid = getTreeGrid();
            ((TreeGrid<String>) grid).addHierarchyColumn(i -> i);
            addColumns(grid, 50, true);
            grid.setItemDetailsRenderer(new ComponentRenderer<>(item -> new Text(item.toString())));
            treeData.getRootItems().forEach(item -> grid.setDetailsVisible(item, true));
            break;
        default:
            break;
    }
    switch(metric) {
        case "verticalscrollframetime":
            add(grid);
            whenRendered(grid).then(v -> grid.getElement().executeJs("window.measureScrollFrameTime(this, false)"));
            break;
        case "horizontalscrollframetime":
            add(grid);
            whenRendered(grid).then(v -> grid.getElement().executeJs("window.measureScrollFrameTime(this, true)"));
            break;
        case "rendertime":
            measureRendered(grid);
            UI.getCurrent().getElement().executeJs("return window.startWhenReady()").then(v -> add(grid));
            break;
        case "expandtime":
            add(grid);
            startWhenRendered(grid).then(v -> {
                measureRendered(grid);
                TreeGrid<String> treeGrid = (TreeGrid<String>) grid;
                TreeData<String> data = ((TreeDataProvider<String>) treeGrid.getDataProvider()).getTreeData();
                treeGrid.expandRecursively(data.getRootItems(), 5);
            });
            break;
        default:
            break;
    }
}