com.extjs.gxt.ui.client.widget.treegrid.TreeGridCellRenderer.java Source code

Introduction

Here is the source code for com.extjs.gxt.ui.client.widget.treegrid.TreeGridCellRenderer.java

Source

/*
 * Sencha GXT 2.3.1 - Sencha for GWT
 * Copyright(c) 2007-2013, Sencha, Inc.
 * licensing@sencha.com
 * 
 * http://www.sencha.com/products/gxt/license/
 */
package com.extjs.gxt.ui.client.widget.treegrid;

import com.extjs.gxt.ui.client.data.ModelData;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.store.TreeStore;
import com.extjs.gxt.ui.client.widget.grid.ColumnData;
import com.extjs.gxt.ui.client.widget.grid.Grid;
import com.extjs.gxt.ui.client.widget.grid.GridCellRenderer;
import com.extjs.gxt.ui.client.widget.treepanel.TreePanel.Joint;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.client.ui.AbstractImagePrototype;

/**
 * A <code>GridCellRenderer</code> that renders a tree into it's column.
 * Renderer may be used in any column, not just the first.
 */
public class TreeGridCellRenderer<M extends ModelData> implements GridCellRenderer<M> {

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public SafeHtml render(M model, String property, ColumnData config, int rowIndex, int colIndex,
            ListStore<M> store, Grid<M> grid) {
        config.css = "x-treegrid-column";

        assert grid instanceof TreeGrid : "TreeGridCellRenderer can only be used in a TreeGrid";

        TreeGrid tree = (TreeGrid) grid;
        TreeStore ts = tree.getTreeStore();

        int level = ts.getDepth(model);

        String id = getId(tree, model, property, rowIndex, colIndex);
        SafeHtml text = getText(tree, model, property, rowIndex, colIndex);
        AbstractImagePrototype icon = calculateIconStyle(tree, model, property, rowIndex, colIndex);
        Joint j = calcualteJoint(tree, model, property, rowIndex, colIndex);

        return tree.getTreeView().getTemplate(model, id, text, icon, false, j, level - 1);
    }

    protected Joint calcualteJoint(TreeGrid<M> grid, M model, String property, int rowIndex, int colIndex) {
        return grid.calcualteJoint(model);
    }

    protected AbstractImagePrototype calculateIconStyle(TreeGrid<M> grid, M model, String property, int rowIndex,
            int colIndex) {
        return grid.calculateIconStyle(model);
    }

    protected String getId(TreeGrid<M> grid, M model, String property, int rowIndex, int colIndex) {
        return grid.findNode(model).id;
    }

    protected SafeHtml getText(TreeGrid<M> grid, M model, String property, int rowIndex, int colIndex) {
        return SafeHtmlUtils.fromString(String.valueOf(model.get(property)));
    }
}