Question

Flex and ActionScript 3 - Selecting a Checkbox and deleting a data grid row

Asked by: jrwalker2

I want be able to delete a datagrid row AND rows out of a data grid if a checkbox is checked. The checkbox is part of the row (the first cell). Right now I cannot detect if the checkbox is selected or not after it has been sent to the datagrid. I would like to check which rows are checked and then remove all of the rows that have a selected check box (call removeTaskRecord()). How can I do this? I just started learning Flex, so all suggestions with accompanied code are appreciated. Thanks

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#FDFDFD, #FDFCFC]">
    <mx:Script>
        <![CDATA[
            
            import mx.collections.ArrayCollection;
            import mx.controls.List;
            import mx.controls.CheckBox;    
            import mx.controls.ComboBox;
            
            [Bindable]    
            private var myArray1:Array = new Array("a", "b", "c");
            
            [Bindable]    
            private var myArray2:Array = new Array("a", "b", "c");
            
            [Bindable]    
            private var myArray3:Array = new Array("a", "b", "c");
            
 
            [Bindable]
            private var dataGridProvider:ArrayCollection = new ArrayCollection();
            
            
            [Bindable]
            private var selectCheckBox:CheckBox = new CheckBox();
            
            private var cb:ComboBox = new ComboBox();
            
            
            private function updateTable():void
            {
                //Add the new data into the table (into the next row of the table)
                dataGridProvider.addItem({col1:selectCheckBox, col2:cb1.selectedLabel,col3: input1.text, col4:cb2.selectedLabel,
                 col5:ns1.value ,col6:cb3.selectedLabel, col7:ns2.value});
 
                //Update the table's dataprovider with the updated task row
                table.dataProvider = dataGridProvider;
                
                //Clear the data from the new task input form 
                cb1.selectedIndex = -1;
                input1.text = null;
                cb2.selectedIndex = -1;
                ns1.value = 0;
                cb2.selectedIndex = -1;
                ns2.value = 0;
            }
            
            private function removeTaskRecord():void
            {
                //Check if the checkbox for the task is selected 
                //((CheckBox)(((Array)(dataGridProvider.getItemIndex(scrumTable.selectedIndex)))[0])).selected
                if(table.selectedIndex>=0)//selectCheckBox.selected)//if(datagrid selected index is greater than or equal to 0)
                {
                    //Remove the task record from the Data Grid data provider
                    dataGridProvider.removeItemAt(table.selectedIndex);    
 
                }
                
                
                
            }
            
        
            
        ]]>
    </mx:Script>
    
    <mx:Panel width="1027" height="382" layout="absolute" borderColor="#0C2B73" left="10" bottom="10">
        <mx:DataGrid x="10" y="10" width="984" height="295" wordWrap="true" id="table" dataProvider="{dataGridProvider}" draggableColumns="false" variableRowHeight="true">
            <mx:columns>
                <mx:DataGridColumn headerText="col1" dataField="col1" editable="true" itemRenderer="mx.controls.CheckBox" width="50" textAlign="center"/>
                <mx:DataGridColumn headerText="col2" dataField="col2"  editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col3" dataField="col3" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col4" dataField="col4" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col5" dataField="col5" editable="true" itemRenderer="mx.controls.NumericStepper"/>
                <mx:DataGridColumn headerText="col6" dataField="col6" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col7" dataField="col7" editable="true" itemRenderer="mx.controls.NumericStepper"/>
            </mx:columns>
        </mx:DataGrid>
        <mx:Button x="921" y="313" label="Remove" id="removeBtn" enabled="true" click="removeTaskRecord()"/>
    </mx:Panel>
    <mx:Panel width="520" height="308" layout="absolute" left="10" top="33" borderColor="#0C2B73">
        <mx:ComboBox x="10" y="40" id="cb1" dataProvider="{myArray1}" width="169" selectedIndex="-1"></mx:ComboBox>
        <mx:TextInput x="202" y="40" width="255" id="input1"/>
        <mx:ComboBox x="10" y="107" dataProvider="{myArray2}" selectedIndex="-1" id="cb2"></mx:ComboBox>
        <mx:ComboBox x="202" y="107" dataProvider="{myArray3}" selectedIndex="-1" id="cb3"></mx:ComboBox>
        <mx:NumericStepper x="10" y="179" maximum="25" id="ns1"/>
        <mx:NumericStepper x="202" y="179" maximum="25" id="ns2"/>
        <mx:Button x="392" y="218" label="Submit"  id="sbBtn" click="updateTable()"/>
    </mx:Panel>
 
    
</mx:Application>
                                  
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Asked On
2008-03-12 at 17:10:55ID23237167
Topics

Adobe Flex

,

Scripting Languages

,

Web Languages/Standards

Participating Experts
4
Points
500
Comments
8

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Answers

 

by: jrwalker2Posted on 2008-03-13 at 08:29:57ID: 21117197

Can someone please help me with this problem? Thanks

 

by: hobbit72Posted on 2008-03-17 at 01:11:48ID: 21140415

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#FDFDFD, #FDFCFC]">
    <mx:Script>
        <![CDATA[
              import mx.utils.ObjectProxy;
           
            import mx.collections.ArrayCollection;
            import mx.controls.List;
            import mx.controls.CheckBox;    
            import mx.controls.ComboBox;
           
            [Bindable]    
            public var myArray1:Array = new Array("a", "b", "c");
           
            [Bindable]    
            private var myArray2:Array = new Array("a", "b", "c");
           
            [Bindable]    
            private var myArray3:Array = new Array("a", "b", "c");
           
 
            [Bindable]
            private var dataGridProvider:ArrayCollection = new ArrayCollection();
           
            private function updateTable():void
            {
                //Add the new data into the table (into the next row of the table)
                var o:Object = new ObjectProxy();
                o.col1 = new Boolean( true);
                o.col2 = cb1.selectedLabel;
                o.col3 = input1.text;
                o.col4 = cb1.selectedLabel;
                o.col5 = ns1.value;
                o.col6 = cb3.selectedLabel;
                o.col7 = ns2.value;
                dataGridProvider.addItem(o);
                //dataGridProvider.addItem({col1:selectCheckBox, col2:cb1.selectedLabel,col3: input1.text, col4:cb2.selectedLabel,
                // col5:ns1.value ,col6:cb3.selectedLabel, col7:ns2.value});
 
                //Update the table's dataprovider with the updated task row
                table.dataProvider = dataGridProvider;
               
                //Clear the data from the new task input form
                cb1.selectedIndex = -1;
                input1.text = null;
                cb2.selectedIndex = -1;
                ns1.value = 0;
                cb2.selectedIndex = -1;
                ns2.value = 0;
            }
           
            private function removeTaskRecord():void
            {
                //Check if the checkbox for the task is selected
                //((CheckBox)(((Array)(dataGridProvider.getItemIndex(scrumTable.selectedIndex)))[0])).selected
                if(table.selectedIndex>=0)//selectCheckBox.selected)//if(datagrid selected index is greater than or equal to 0)
                {
                    //Remove the task record from the Data Grid data provider
                    dataGridProvider.removeItemAt(table.selectedIndex);    
 
                }
               
               
               
            }
           
       
            public function deleteSelected():void
            {
                        for ( var r:int =0; r < dataGridProvider.length; r++)
                        {
                              if( dataGridProvider[r].col1 == true)
                              {
                                    dataGridProvider.removeItemAt( r);
                              }
                        }

            }
        ]]>
    </mx:Script>
   
    <mx:Panel width="1027" height="382" layout="absolute" borderColor="#0C2B73" left="10" bottom="10">
        <mx:DataGrid x="10" y="10" width="984" height="295" wordWrap="true" id="table" dataProvider="{dataGridProvider}" draggableColumns="false" variableRowHeight="true">
            <mx:columns>
                <mx:DataGridColumn headerText="col1" dataField="col1" editorDataField="selected" editable="true" width="50" textAlign="center">
                                 <mx:itemRenderer>
                          <mx:Component>
                                <mx:CheckBox selected="{data.col1}" click="{data.col1=(event.currentTarget as CheckBox).selected}" />
                          </mx:Component>
                      </mx:itemRenderer>
                        </mx:DataGridColumn>
                <mx:DataGridColumn headerText="col2" dataField="col2" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col3" dataField="col3" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col4" dataField="col4" editable="true">
                                 <mx:itemRenderer>
                          <mx:Component>
                                <mx:ComboBox dataProvider="{outerDocument.myArray1}" />
                          </mx:Component>
                      </mx:itemRenderer>                               
                        </mx:DataGridColumn>                
                <mx:DataGridColumn headerText="col5" dataField="col5" editorDataField="text" editable="true">
                                 <mx:itemRenderer>
                          <mx:Component>
                                <mx:NumericStepper maximum="100"/>
                          </mx:Component>
                      </mx:itemRenderer>                               
                        </mx:DataGridColumn>
                <mx:DataGridColumn headerText="col6" dataField="col6" editable="true" itemRenderer="mx.controls.TextInput"/>
                <mx:DataGridColumn headerText="col7" dataField="col7" editable="true" itemRenderer="mx.controls.NumericStepper"/>
            </mx:columns>
        </mx:DataGrid>
        <mx:Button x="921" y="313" label="Remove" id="removeBtn" enabled="true" click="removeTaskRecord()"/>
    </mx:Panel>
    <mx:Panel width="520" height="308" layout="absolute" left="10" top="33" borderColor="#0C2B73">
        <mx:ComboBox x="10" y="40" id="cb1" dataProvider="{myArray1}" width="169" selectedIndex="-1"></mx:ComboBox>
        <mx:TextInput x="202" y="40" width="255" id="input1"/>
        <mx:ComboBox x="10" y="107" dataProvider="{myArray2}" selectedIndex="-1" id="cb2"></mx:ComboBox>
        <mx:ComboBox x="202" y="107" dataProvider="{myArray3}" selectedIndex="-1" id="cb3"></mx:ComboBox>
        <mx:NumericStepper x="10" y="179" maximum="25" id="ns1"/>
        <mx:NumericStepper x="202" y="179" maximum="25" id="ns2"/>
        <mx:Button x="392" y="218" label="Submit"  id="sbBtn" click="updateTable()"/>
        <mx:Button x="244" y="218" label="Delete Selected"  id="delBtn" click="deleteSelected()"/>
    </mx:Panel>    
</mx:Application>

 

by: sujitdPosted on 2008-07-10 at 18:49:04ID: 21979320

if the data list is dynamically loaded from db and not an array dose the above code
suffise ?

 

by: RioVicPosted on 2008-08-18 at 05:16:51ID: 22251055

This is a great solution!

 

by: RioVicPosted on 2008-08-18 at 08:13:51ID: 22252631

I discovered a small bug!  When there is more than one item to delete, the loop counter needs to be decremented as r-- after the delete.  Otherwise, since there are fewere items left in the array, it skips and item.

Try adding three items, then checking the first tow and hit delete toe see that the second one remains (cehcked) an is moved into first place.

Easy to fix, but not obvious.

-RioVic

 

by: OneWorldMediaPosted on 2008-12-14 at 13:35:44ID: 23169414

RioVic - can you please post the bug fix to this for the r-- after delete?

 

by: OneWorldMediaPosted on 2008-12-14 at 13:50:44ID: 23169494

Nevermind - I figured it out.  I just put  r = r - 1; inside the delete loop.... that worked

20120131-EE-VQP-002

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