Question

Flex 3 Datagrid: pop-up window when cell is selected

Asked by: newbieal

I have a flex datagrid to which I need to add this functionality: user clicks on cell, window should pop-up with additional information about the value in that cell.  The pop-up might need to be another datagrid with more info.

The data source for the main datagrid is xml.  Thanks for any help!

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Asked On
2009-04-07 at 08:34:24ID24302415
Topics

Adobe Flex

,

ActionScript

Participating Experts
1
Points
500
Comments
14

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Answers

 

by: Fuzzy_Logic_Posted on 2009-04-07 at 09:34:01ID: 24089134

Using Adobes Datagrid example at http://livedocs.adobe.com/flex/3/langref/mx/controls/DataGrid.html

add the code snippet below beneath the <mx:Application....>  tag.

Add initialize="init()" to the <mx:Application.... >

<mx:Script>
    <![CDATA[
 
        import mx.controls.dataGridClasses.DataGridItemRenderer;
        import mx.events.ListEvent;
        import mx.controls.Alert;
        
    public function init():void
    {
        //add the event listener
        this.dg.addEventListener(ListEvent.ITEM_CLICK, itemClicked);
    }
    
    private function itemClicked(le:ListEvent):void
    {
        
        var idgr:DataGridItemRenderer = le.itemRenderer as DataGridItemRenderer;
        var itemContents:String = idgr.listData.label;
        
        
        Alert.show(itemContents, "Value of cell clicked");
        
    }
        
    ]]>
</mx:Script>
                                              
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by: newbiealPosted on 2009-04-07 at 09:49:07ID: 24089325

Thanks!  This is a great start, however the itemContents should be populated with additional data from my xml file.  If user clicks on a cell with content of 'A'.  Then I need to display additional info from my xml file that relates to content 'A'.

Also, the example only displays info when clicked within cells of the first column.  My datagrid has several more columns.

 

by: Fuzzy_Logic_Posted on 2009-04-07 at 11:06:38ID: 24090128

When I run this I do get the cells values in the Alert box. Not just Column 1 data.

I changed function itemClick to get the object represented by the XML instead and thus get other data for that row.

Below is the whole file, added another child node to the XML


<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()">
 
<mx:Script>
    <![CDATA[
        import mx.core.IFlexDisplayObject;
        import mx.managers.PopUpManager;
        import mx.controls.dataGridClasses.DataGridItemRenderer;
        import mx.events.ListEvent;
        import mx.controls.Alert;
        
    public function init():void
    {
        //add the event listener
        this.dg.addEventListener(ListEvent.ITEM_CLICK, itemClicked);
    }
    
    private function itemClicked(le:ListEvent):void
    {
        
        // store whole item selected
        var itemContents:Object = this.dg.selectedItem
        
        // get other element
        Alert.show(itemContents.data, "Value of cell clicked");
        
    }
        
    ]]>
</mx:Script>
 
     <mx:XMLList id="employees">
        <employee>
       
            <name>Christina Coenraets</name>
            <phone>555-219-2270</phone>
            <email>ccoenraets@fictitious.com</email>
            <active>true</active>
            <data>
                other info CC
            </data>
        </employee>
        <employee>
        
            <name>Joanne Wall</name>
            <phone>555-219-2012</phone>
            <email>jwall@fictitious.com</email>
            <active>true</active>
             <data>
                other info JW
            </data>
        </employee>
        <employee>
        
            <name>Maurice Smith</name>
            <phone>555-219-2012</phone>
            <email>maurice@fictitious.com</email>
            <active>false</active>
             <data>
                other info MC
            </data>
        </employee>
        <employee>
       
            <name>Mary Jones</name>
            <phone>555-219-2000</phone>
            <email>mjones@fictitious.com</email>
            <active>true</active>
             <data>
                other info MJ
            </data>
        </employee>
    </mx:XMLList>
 
    <mx:Panel title="DataGrid Control Example" height="100%" width="100%" 
        paddingTop="10" paddingLeft="10" paddingRight="10">
 
        <mx:Label width="100%" color="blue"
            text="Select a row in the DataGrid control."/>
 
        <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5" dataProvider="{employees}">
            <mx:columns>
                <mx:DataGridColumn dataField="name" headerText="Name"/>
                <mx:DataGridColumn dataField="phone" headerText="Phone"/>
                <mx:DataGridColumn dataField="email" headerText="Email"/>
            </mx:columns>
        </mx:DataGrid>
 
    </mx:Panel>
 
</mx:Application>
                                              
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by: Fuzzy_Logic_Posted on 2009-04-07 at 12:22:14ID: 24090898

Finally to get specific data from a cell, I have added childnodes to the data node so that it maps the parent nodes. Now you can get specific data for a particular cell.

Hope that somewhere in here lies a solution.

ps. search for PopUpManager in adobe live docs to get info on how to get a full pop window http://livedocs.adobe.com/flex/3/langref/index.html


Regards FL

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()">
 
<mx:Script>
    <![CDATA[
        import mx.core.IFlexDisplayObject;
        import mx.managers.PopUpManager;
        import mx.controls.dataGridClasses.DataGridItemRenderer;
        import mx.events.ListEvent;
        import mx.controls.Alert;
        
    public function init():void
    {
        //add the event listener
        this.dg.addEventListener(ListEvent.ITEM_CLICK, itemClicked);
    }
    
    private function itemClicked(le:ListEvent):void
    {
        
        // store whole item selected as an XML object
        var itemContents:XML = this.dg.selectedItem as XML;
        
        // get node 'data'
        var detailContents:XMLList = itemContents.data;
        
        // get column index to map to 'data' node
        var colInd:int = le.columnIndex;
        
        //using columnIndex from ListEvent get child of the sub data
        var value:String = detailContents.children()[colInd];
        
        if (value != null)
        {
       Alert.show(value, "Data");
        }
        
    }
        
    ]]>
</mx:Script>
     <mx:XMLList id="employees">
        <employee>
       
            <name>Christina Coenraets</name>
            <phone>555-219-2270</phone>
            <email>ccoenraets@fictitious.com</email>
            <active>true</active>
            <data>
                <middleName>
                    Purple
                </middleName>
                <callHours>
                    6am - 7pm
                </callHours>
                <emailValid>
                    yes
                </emailValid>
            </data>
        </employee>
        <employee>
        
            <name>Joanne Wall</name>
            <phone>555-219-2012</phone>
            <email>jwall@fictitious.com</email>
            <active>true</active>
             <data>
                <middleName>
                    Brown
                </middleName>
                <callHours>
                    11am - 9pm
                </callHours>
                <emailValid>
                    no
                </emailValid>
            </data>
        </employee>
        <employee>
        
            <name>Maurice Smith</name>
            <phone>555-219-2012</phone>
            <email>maurice@fictitious.com</email>
            <active>false</active>
             <data>
                <middleName>
                    Yellow
                </middleName>
                <callHours>
                    6pm - 7pm
                </callHours>
                <emailValid>
                    maybe
                </emailValid>
             </data>
        </employee>
        <employee>
       
            <name>Mary Jones</name>
            <phone>555-219-2000</phone>
            <email>mjones@fictitious.com</email>
            <active>true</active>
             <data>
                <middleName>
                    Black
                </middleName>
                <callHours>
                    8pm - 12pm
                </callHours>
                <emailValid>
                    sometimes
                </emailValid>
            </data>
        </employee>
    </mx:XMLList>
 
    <mx:Panel title="Getting Sub Data from a Cell" height="100%" width="100%" 
        paddingTop="10" paddingLeft="10" paddingRight="10">
 
        <mx:Label width="100%" color="blue"
            text="Click a cell in the DataGrid control."/>
 
        <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5" dataProvider="{employees}">
            <mx:columns>
                <mx:DataGridColumn dataField="name" headerText="Name"/>
                <mx:DataGridColumn dataField="phone" headerText="Phone"/>
                <mx:DataGridColumn dataField="email" headerText="Email"/>
            </mx:columns>
        </mx:DataGrid>
 
    </mx:Panel>
 
</mx:Application>
                                              
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by: newbiealPosted on 2009-04-07 at 13:28:55ID: 24091576

Thanks, Fuzzy Logic.

I implemented the code and nothing displayed.  Then I did some line by line debugging and have noticed that this line:

var detailContents:XMLList = itemContents.data;

produces a null value.  I noticed that the 'data' part is not part of the normal 'itemContents' library.  What should I put in place of this 'data' value?

 

by: newbiealPosted on 2009-04-07 at 13:46:25ID: 24091771

I changed that line to:

var detailContents.XMLList = itemContents.children();

It produces the data I want, however it is displayed in XML format to the user.  How can I change the format?

 

by: newbiealPosted on 2009-04-07 at 13:49:04ID: 24091804

sorry, ignore my last comment reg. the change...it didn't not do what I wanted it.

 

by: Fuzzy_Logic_Posted on 2009-04-07 at 14:21:40ID: 24092094

I'm not sure why this isn't working for you. Seems to work just fine here :-~

itemContents.data refers to the extra nodes that I have added to the example which map the parent nodes giving easy access to sub data for each cell

itemContents is just a variable to hold the selected row and thus the XML.

itemContents.children will just give you the XMLList of all the nodes.

itemContents.data refers to the node <data> and using the columnIndex we can access the children of the <data> node.

It depends really how you have structured your XML file as to how you access sub data.



 

by: Fuzzy_Logic_Posted on 2009-04-10 at 03:28:59ID: 24114440

Have you made any progress with this?

 

by: newbiealPosted on 2009-04-11 at 16:34:26ID: 24124038

A little bit in that it displays the relevant row info when I click on a cell, but it displays it in xml format.  I want to present it in a way that is user friendly.  I'm struggling with that aspect.

 

by: Fuzzy_Logic_Posted on 2009-04-11 at 17:15:15ID: 24124115

If you like show me the xml that you are getting in the display and then I'll show you how to make it more readable.

 

by: newbiealPosted on 2009-04-12 at 20:08:30ID: 24127822

It's just like any xml file data.  Here is an example (actual data is much longer, but I think you get the gist):

<Data>
<CellData> 1 </CellData>
</Data>

 

by: Fuzzy_Logic_Posted on 2009-04-13 at 02:39:13ID: 24128682


If your xml is simple as you say then all the information is above.

I've edited the code and added some commented out lines. They are in private function itemClicked(le:ListEvent)




<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()">
 
<mx:Script>
    <![CDATA[
        import mx.core.IFlexDisplayObject;
        import mx.managers.PopUpManager;
        import mx.controls.dataGridClasses.DataGridItemRenderer;
        import mx.events.ListEvent;
        import mx.controls.Alert;
        
    public function init():void
    {
        //add the event listener
        this.dg.addEventListener(ListEvent.ITEM_CLICK, itemClicked);
    }
    
    private function itemClicked(le:ListEvent):void
    {
        
        // store whole item selected as an XML object
        var itemContents:XML = this.dg.selectedItem as XML;
        
        // get node 'data'
        var detailContents:XMLList = itemContents.data;
        
        // get column index to map to 'data' node
        var colInd:int = le.columnIndex;
        //
        //
        //#################################################################################
        // uncomment one line to see how to get each part of the XML
        
        //var value:String = detailContents.children()[colInd];            // uses columnIndex from ListEvent get particluar sub data
        //var value:String = itemContents;                                 // gets the whole row in XML
        //var value:String = itemContents.subdata;                         // gets the sub data in XML
        //var value:String = itemContents.phone;                           // gets the phone data as String
        //var value:String = itemContents.subdata.middleName;              // gets the middle name of the sub data
        var value:String = "My name is " + itemContents.ename + ".\n My phone is " + itemContents.phone + ".\n Contact me during " + itemContents.subdata.callHours;
           
                                                                           // The line above puts a lot of the elements into a readable message.
        //#################################################################################
        //
        //
          
        if (value != null)
        {
       Alert.show(value, "Data");
        }
        
    }
        
    ]]>
</mx:Script>
     <mx:XMLList id="employees">
        <employee>
       
            <ename>Christina Coenraets</ename>
            <phone>555-219-2270</phone>
            <email>ccoenraets@fictitious.com</email>
            <active>true</active>
            <subdata>
                <middleName>
                    Purple
                </middleName>
                <callHours>
                    6am - 7pm
                </callHours>
                <emailValid>
                    yes
                </emailValid>
            </subdata>
        </employee>
        <employee>
        
            <ename>Joanne Wall</ename>
            <phone>555-219-2012</phone>
            <email>jwall@fictitious.com</email>
            <active>true</active>
             <subdata>
                <middleName>
                    Brown
                </middleName>
                <callHours>
                    11am - 9pm
                </callHours>
                <emailValid>
                    no
                </emailValid>
            </subdata>
        </employee>
        <employee>
        
            <ename>Maurice Smith</ename>
            <phone>555-219-2012</phone>
            <email>maurice@fictitious.com</email>
            <active>false</active>
             <subdata>
                <middleName>
                    Yellow
                </middleName>
                <callHours>
                    6pm - 7pm
                </callHours>
                <emailValid>
                    maybe
                </emailValid>
             </subdata>
        </employee>
        <employee>
       
            <ename>Mary Jones</ename>
            <phone>555-219-2000</phone>
            <email>mjones@fictitious.com</email>
            <active>true</active>
             <subdata>
                <middleName>
                    Black
                </middleName>
                <callHours>
                    8pm - 12pm
                </callHours>
                <emailValid>
                    sometimes
                </emailValid>
            </subdata>
        </employee>
    </mx:XMLList>
 
    <mx:Panel title="Getting Sub Data from a Cell" height="100%" width="100%" 
        paddingTop="10" paddingLeft="10" paddingRight="10">
 
        <mx:Label width="100%" color="blue"
            text="Click a cell in the DataGrid control."/>
 
        <mx:DataGrid id="dg" width="100%" height="100%" rowCount="5" dataProvider="{employees}">
            <mx:columns>
                <mx:DataGridColumn dataField="ename" headerText="Name"/>
                <mx:DataGridColumn dataField="phone" headerText="Phone"/>
                <mx:DataGridColumn dataField="email" headerText="Email"/>
            </mx:columns>
        </mx:DataGrid>
 
    </mx:Panel>
 
</mx:Application>

                                              
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by: newbiealPosted on 2009-04-13 at 08:57:14ID: 31567571

Thanks for all your help.  You've definitely lead me into the right direction.  

20120131-EE-VQP-002

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