ExtendedRowExpander

[Arno.Nyhm]

thanks to @bramvano for the idea
thread: http://www.extjs.com/forum/showthrea...472#post369472

package org.yournamehere.client.gui.components;

import com.extjs.gxt.ui.client.core.El;
import com.extjs.gxt.ui.client.core.XTemplate;
import com.extjs.gxt.ui.client.widget.grid.RowExpander;

/**
 * A column config and component plugin that adds the ability for each row to be
 * expanded, showing custom content that spans all the rows columns.
 * with extended control over expanding rows
 *
 * @author anonym
 */
public class ExtendedRowExpander extends RowExpander {

    /**
     * Creates a new extended row expander.
     */
    public ExtendedRowExpander() {
        super();
    }

    /**
     * Creates a new extended row expander with the given template.
     *
     * @param template the template
     */
    public ExtendedRowExpander(XTemplate template) {
        super(template);
    }

    /**
     * expand all rows
     *
     */
    public void expandAllRows() {
        for (int rowIndex = 0; rowIndex < grid.getStore().getCount(); rowIndex++) {
            this.expandRow(rowIndex);
        }
    }

    /**
     * collapse all rows
     *
     */
    public void collapseAllRows() {
        for (int rowIndex = 0; rowIndex < grid.getStore().getCount(); rowIndex++) {
            this.collapseRow(rowIndex);
        }
    }

    /**
     * toggle all rows
     *
     * @param expand true to expand, false to collapse rows
     */
    public void toggleAllRows(boolean expand) {
        if (expand) {
            expandAllRows();
        } else {
            collapseAllRows();
        }
    }

    /**
     * expand row
     *
     * @param rowIndex index of the row
     */
    public void expandRow(int rowIndex) {
        this.expandRow(getRowAsEl(rowIndex));
    }

    /**
     * collapse row
     *
     * @param rowIndex index of the row
     */
    public void collapseRow(int rowIndex) {
        this.collapseRow(getRowAsEl(rowIndex));
    }

    /**
     * toggle row
     *
     * @param rowIndex index of the row
     */
    public void toggleRow(int rowIndex) {
        this.toggleRow(getRowAsEl(rowIndex));
    }

    /**
     * toggle row
     *
     * @param rowIndex index of the row
     * @param expand true to expand, false to collapse rows
     */
    public void toggleRow(int rowIndex, boolean expand) {
        if (expand) {
            expandRow(rowIndex);
        } else {
            collapseRow(rowIndex);
        }
    }

    /**
     * get the row as El
     *
     * @param rowIndex
     * @return El row
     */
    protected El getRowAsEl(int rowIndex) {
        return El.fly(grid.getView().getRow(rowIndex));
    }
} 

usage:

            grid.addListener(Events.ViewReady, new Listener<BaseEvent>() {

                public void handleEvent(BaseEvent be) {
                    expander.expandAllRows();
                    expander.collapseRow(2);
                    expander.collapseRow(4);
                }
            });