Recently had a couple interesting questions:

Question : I am using flexicious HTMLTree grid in one of my project and I am not able to figure how to retrieve filtered rows anytime on grid. I need all rows which are actually filtered and not just rows appearing on screen at any instant. Please let me know how can I achieve that and it will great if you could share sample example of it.

Answer :   var filterData = grid.getFilteredPagedSortedData({},true,false,false,false);

Question : We are using HTMLTreeGrid with angularJS.  In our applications we have added buttons to our grid using the ToolBarActions but need more control when to enable a button than simply saying a row has been picked at a level.  For example, we only want to enable the button based on data in the selected row.  Is that possible?  Can you send an example how to do this?  Or do we need to create a Custom PagerControl to do this?  And how easy is it to extend the PagerControl to additional functions?

It is very easy to extend the pager control:

http://blog.htmltreegrid.com/post/How-to-Customize-the-Pager-(Toolbar)-Export-Options-Settings-and-Save-Settings-Popups.aspx

The toolbar actions are built within the pager control. You can do something like this:

 toolbarActionValidFunction="isValidToolbarAction" 

Here is the default implementation:

/**
 * Evaluates whether the given toolbar action is valid or not.
 *
 * If toolbarActionValidFunction is not null, returns the result of the function passing in the given ToolbarAction.
 * Else returns true.
 * @method isToolbarActionValid
 */
isToolbarActionValid = function (action, currentTarget, extendedPager) {
    if (action.requiresSingleSelection) {
        if (this.getSelectedKeys().length == 1) {
            var appliesToLevel = action.level;
            var itemLvl = this.getLevelForItem(this.getSelectedObjects()[0]);
            if (appliesToLevel == -1 || (itemLvl && (itemLvl.getNestDepth() == appliesToLevel)))
                return true;
            else
                return false;
        }
        return false;
    } else if (action.requiresSelection) {
        return this.getSelectedKeys().length > 0;
    }
    return true;
};

Finally, two attached examples demonstrate how to accomplish this with Angular JS:

angular (1).html (5.12 kb)

Index_hierarchy.html (6.24 kb)

And can you explain how to set the grid so picking a top level row does not automatically pick all nested next levels rows?  We can pick a row from the next level row and it does not auto pick the parent row.  We need the user to explicitly pick the nested rows even when the parent row is selected.

è     Just set enableSelectionCascade to false.