Datagrid getItemAt problems
I have a function that is essentially
myDataGrid.getItemAt(rowNum)[columnString]
I have attempted substituting the column strinng for the column index, but I get the same error regardless:
Error: Call to a possibly undefined method getItemAt through a reference with static type mx.controls:DataGrid.
I have imported the mx.controls.DataGrid at the top of th script section, so I am little unsure of how to proceed. I need to access these specific cell values, and eventually it will hash out to a loop with the row numbers. Any advice is welcome.
DataGrid does not have getItemAt. Try DataGrid.dataProvider.getItemAt()
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui
Similar Messages
-
Simple DataGrid validation Problem
hi friends
I am working on a application in which i m facing a problem.i have a datagrid having two column field one is simple datagrid column and in other datagrid column i render textinput as a component. there are only two row in my datagrid.so now i have to apply validation on that data grid.i mean if any textinput componet which is render in second column in data grid left blank and i click on save button then there should be validation Alert messg.
i am facing a problem on gettin id(instance) of that two rendered textinput component.Please help me out.
Thanks and Regards
Vineet OshoHi Vineet Osho,
You can try this...
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
>
<mx:Script>
<![CDATA[
import mx.utils.StringUtil;
import mx.collections.ArrayCollection;
import mx.controls.TextInput;
import mx.events.DataGridEvent;
import mx.controls.Alert;
public var arr:Array = [];
public var incrementer:int;
private function validateTextInputs():void
var strIndexes:String="";
var gridDP:ArrayCollection = dataGrid.dataProvider as ArrayCollection;
for(var i:int=0;i<gridDP.length;i++)
if(StringUtil.trim(gridDP.getItemAt(i).displayText) == "")
strIndexes += (i + 1) + ",";
if(strIndexes.length > 0)
strIndexes = strIndexes.substring(0,strIndexes.length-1);
Alert.show("The TextInputs " + strIndexes + " are empty.");
]]>
</mx:Script>
<mx:DataGrid id="dataGrid" horizontalCenter="0" verticalCenter="0" width="400" height="200">
<mx:columns>
<mx:DataGridColumn headerText="First" width="60" dataField="artist" editable="false"/>
<mx:DataGridColumn width = "60" headerText = "Premium %(e.g. Percentage as 100)" >
<mx:itemRenderer>
<mx:Component>
<mx:TextInput styleName="TextInputRight" focusOut="data.displayText=this.text;" width="100" text="{data.displayText}">
</mx:TextInput>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:columns>
<mx:dataProvider>
<mx:ArrayCollection>
<mx:Array>
<mx:Object title="Stairway to Heaven" artist="Led Zepplin" displayText=""/>
<mx:Object title="How to Save a Life" artist="Fray" displayText=""/>
</mx:Array>
</mx:ArrayCollection>
</mx:dataProvider>
</mx:DataGrid>
<mx:Button id="btn" label="click" x="527" y="450" click="validateTextInputs()" />
</mx:Application>
Thanks,
Bhasker -
I have an ApplicationControlBar above a data grid. The data grid has widths specified and is bound to a data source that is populated by a service call. The mark up below causes the description column to disappear and the header row is about 10 times taller than it should be. If I put an empty label inside the application bar it all loads as expected. I tried putting an updateComplete handler on the grid but I found two problems. Adding a trace to the method handler showed that it just kept firing over and over. It also prevented resize of the grid columns.
<mx:VBox
height="100%" width="80%" horizontalScrollPolicy="off" verticalScrollPolicy="off">
<mx:ApplicationControlBar width="100%" horizontalGap="0" id="docsAppBar">
<mx:Button click="browseForDocs()" id="
docsTabUploadButton" label="
Upload Document" enabled="
{MediaManagerModel.activateUploadButton}"/>
</mx:ApplicationControlBar>
<mx:HBox width="100%" height="100%">
<mx:DataGrid dataProvider="{tabMediaList}" id="
docGrid" width="
100%" height="
100%" verticalGridLines="
true" variableRowHeight="
true" wordWrap="
true" sortableColumns="
false" editable="
false" allowDragSelection="
true" dragEnabled="
true" dragMoveEnabled="
true" dropEnabled="
true" dragComplete="updateRowPositions()"
itemClick="updateCurrentMediaObject()"
>
<mx:columns>
<mx:DataGridColumn width = "20" id="displayOrderCol" headerText="#" dataField="displayOrder" labelFunction="MediaManagerModel.getMediaDisplayOrder"/>
<mx:DataGridColumn width = "250" id="mediaNameCol" headerText="File Name" dataField="mediaName" />
<mx:DataGridColumn width = "120" id="mediaTypeCol" headerText="Type" dataField="mediaType" labelFunction="MediaManagerModel.getMediaTypeDisplay"/>
<mx:DataGridColumn width = "60" id="buyerCol" headerText="Public" dataField="buyer" labelFunction="MediaManagerModel.getPublicDisplay" textAlign="center"/>
<mx:DataGridColumn width = "50" id="mediaSizeCol" headerText="Size" dataField="mediaSize" labelFunction="MediaManagerModel.getMediaSizeDisplay" textAlign="center"/>
<mx:DataGridColumn width = "90" id="inputDateCol" headerText="Date Added" dataField="inputDate" labelFunction="MediaManagerModel.getMediaInputDateDisplay" textAlign="center"/>
<mx:DataGridColumn width= "240" id="mediaDescrCol" headerText="Description" dataField="mediaDescr" />
</mx:columns>
</mx:DataGrid>
</mx:HBox>
</mx:VBox>
If I add <mx:Label/> inside the ApplicationControlBar everything renders fine. Any ideas?How are you re-assigning the dataProvider from the
RemoteObject result?
Tracy -
Hello to everyone who reads this. I've been on the forums
over the past few days trying to track down my issue, but I cant
seem to nail it down. I was hoping someone would have the time to
help me out.
Problem is this: Play list editor what all the information is
stored in a mysql database. retrieving the information and passing
it to flex and working with it in data grids has been relatively
smooth. The problem happens when I attempt to drag files onto the
playlist. It seems the information being passed is an array 'items'
as it states in the docs, but in each array is xml associated with
the file.
ex:
<file>
<FK_File>752</FK_File>
<filename>01 Summertime.mp3</filename>
<filePath>/home/public/data/audio/Internal HDD-CORE
(sda1) [42]/Various Artists/Summertime</filePath>
<pic>
http://dcerouter/pluto-admin/mediapics/5153_tn.jpg</pic>
<Title>Summertime</Title>
<genre PK_Attribute="73">Funk</genre>
<performer PK_Attribute="308">Ohio
Players</performer>
<ReleaseDate
PK_Attribute="229">2005</ReleaseDate>
<Album PK_Attribute="311">Summertime</Album>
<Track PK_Attribute="72">1</Track>
</file>
<file>
<FK_File>1426</FK_File>
<filename>02 Fantasy.mp3</filename>
<filePath>/home/public/data/audio/Internal HDD-CORE
(sda1) [42]/Earth, Wind & Fire/Earth Wind &
Fire</filePath>
<pic>
http://dcerouter/pluto-admin/mediapics/270_tn.jpg</pic>
<Title>Fantasy</Title>
<genre PK_Attribute="73">Funk</genre>
<performer PK_Attribute="762">Earth Wind &amp;
Fire</performer>
<ReleaseDate
PK_Attribute="765">1978</ReleaseDate>
<Album PK_Attribute="766">Earth Wind &amp;
Fire</Album>
<Track PK_Attribute="151">2</Track>
</file>
<file>
<FK_File>1974</FK_File>
<filename>02 Give Up The Funk (Tear The Roof Off The
Sucker).mp3</filename>
<filePath>/home/public/data/audio/Internal HDD-CORE
(sda1) [42]/Parliament/Tear The Roof Off 1974-1980 (Disc
2)</filePath>
<pic>
http://dcerouter/pluto-admin/mediapics/_tn.jpg</pic>
<Title>Give Up The Funk (Tear The Roof Off The
Sucker)</Title>
<genre PK_Attribute="73">Funk</genre>
<performer
PK_Attribute="1150">Parliament</performer>
<ReleaseDate
PK_Attribute="731">1976</ReleaseDate>
<Album PK_Attribute="1153">Tear The Roof Off 1974-1980
(Disc 2)</Album>
<Track PK_Attribute="151">2</Track>
</file>
Im assuming the comma separation from each child 'file',
denotes the items are stored as an array. i don't know if i should
attempt to send them back to php for processing of if im doing
something wrong to begin with that the data comes out that way.
Thanks in advance for any responses or insights.I'm not sure there is a proper way to do anything ( who
decides this anyhow :) ) ....I guess it depends on what your doing
and how efficient it is and whether it needs to scale to a massive
system or not..otherwise if it works ...it works !
I dont actually use php on the server side, i use java remote
objects. and they return java collections...which i then cast to
arraycollection in flex and access it that way...I'm not sure what
the php equivalent is, some sort of array (cohesive ??) as you
mentioned. I really like the way java and flex co-exist on the
server & client. If i make a .as class for an object in flex, I
then make the equivalent java class on the server so I can store it
in the DB
and do the CRUD stuff. I use keys a lot too, so i find my
datagrids in flex often need itemrenderers / comboboxes to be able
to choose the key values as options , so the combo items come
straight out the DB too..anyway you get the gist..it sounds like
your doing similar. I have done a little php before and I really
liked how little code was required to do stuff. I think for me,
I've done a bit of java before so its easier just to stay with what
you know..glad you sorted it out yourself too. -
Hi,
I've given specific height to my grid, i've lots of records
in the grid. Say, my given height to the grid display 5 records at
a time. The problem is the partial of six record has also coming
beneth the grid! Even I use grid.invalidateDisplayList method, it
also coming at the beneath of the grid! and when i'm scrolling the
grid, that last record of the present display list, still making
some very visual disturbment!
Any workrout around..? Any help!
Thanks,
ASBYou need to define your datagrid columns with the dateField
property appropriately set. Also, ArrayCollection is not something
that you use as a child of the DataGrid tag. Use the following
code, It works as per your requirement.
<?xml version="1.0"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:DataGrid width="500" dataProvider="{myarr}">
<mx:columns>
<mx:DataGridColumn dataField="id"/>
<mx:DataGridColumn dataField="name"/>
</mx:columns>
</mx:DataGrid>
<mx:ArrayCollection id="myarr">
<mx:Object>
<mx:id>123456789123456789</mx:id>
<mx:name>Peter</mx:name>
</mx:Object>
<mx:Object>
<mx:id>123456789012345678</mx:id>
<mx:name>Kristina</mx:name>
</mx:Object>
</mx:ArrayCollection>
</mx:Application>
Thanks
Harish -
I'm trying to create a contact search/selection component
that works somewhat like a combobox (more like SuperComboBox
http://blog.strikefish.com/blog/index.cfm/2008/3/21/Flex-Smart-Combo-aka-look-ahead-combo
See sample at
http://www.eval.rmc.psu.edu/dgt/DataGridTest.html
Source view is enabled.
Basically, after the user types a few characters of the last
name, a datagrid (separate component) is popped up and presents a
list of matching contacts. The component includes view edit add
buttons, too (which are not active in the included example).
This all works great except for a couple of problems with the
popped up datagrid. I've tried both the standard and advanced dg's
and the both act the same.
If the number of rows returned exceeds the area of the
datagrid (12 rows in the example), the datagrid, as expected,
displays a vertical scroll bar. The scrollbar/datagrid doesn't work
properly at that point, though. Clicking the down arrow or in the
scrollbar track or the down arrow DOES NOT scroll the data.
Grabbing the slider bar and dragging it down DOES scroll the data
down. However, when I do scroll down using the slider, clicking on
a row does not fire the itemClick event, and the grid scrolls up to
the first 12 lines and highlights a row in the first 12 rows. CLICK
does get fired but always returns a row between 1 and 12.
Now, ideally, the user is going to type 3 or 4 characters of
the last name and zero right in on the contact they're looking for
without the need for scrolling, but there are always the outliers
like 'Smith' that return a large number hits (the example uses PA
Legislators offices, so it's not quite representative of the
end-use data set). Regardless, the datagrid object doesn't appear
to work correctly when it's a component -- I'm not sure if it's a
bona fide bug, or the whether it's that the grid is a component,
contained in a canvas, or being popped up that's the problem. More
likely, my flex newbie self just doesn't have some vital attribute
set correctly, or I'm doing something else that's not correct.
Any insights would be greatly appreciated.
Thanks,
want-a-dw
Sample code included.
Windows XP SP2
Flex Builder 3.0.205647
Same results with these browsers/player versions.
Firefox 2.0.0.17, Flash Player 9.0.124.0 (and 9.0.115.0)
IE 6.0.2900.2180, Flash Player 9.0.124.0 (and 9.0.115.0)
Chrome 0.2.149.30, Flash Player 9.0.124.0> That is definitely incorrect behavior.
> Does this happen in a simple test app? I think I have an
example I can try with, I will post back what I find.
Yes. There is an example of the behavior at
http://www.eval.rmc.psu.edu/dgt/DataGridTest.html
and source code view is enabled. Thanks for your help. -
Datagrid refresh problem?
fileListArray.refresh();
dg_curtainmanager.invalidateList();
dg_curtainmanager.invalidateDisplayList();
<mx:DataGrid id="dg_curtainmanager" showHeaders="true" editable="true" includeInLayout="false" dataProvider="{fileListArray}" creationComplete="" variableRowHeight="true" wordWrap="true" rowCount="{fileListArray.length}" width="100%" >
<mx:DataGridColumn headerText="Parent Folder" sortable="true" editable="false" width="250" minWidth="65" wordWrap="true" >
<mx:itemRenderer>
<fx:Component>
<mx:HBox width="100%"
horizontalAlign="left" verticalAlign="middle">
<mx:Image source="@Embed(source='images/edit_16.gif')" toolTip="Select Starting Folder" buttonMode="true" click="outerDocument.parentfolderimagclick()" />
<mx:Label text="{data.document_folder_name}" color="black" />
</mx:HBox>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:DataGrid>@welcomecan,
What refresh problem you are facing.. in DataGrid? When you change your DataProvider for your grid the values are not being changed or somethingelse..??
Please always be clear in explaining your problem in order to get it resolved..
Thanks,
Bhasker -
Datagrid Autoscroll Problem.
Hi,
I need one urgent help. I have a datagrid with lot of item renderers. While my datagrid has verticalscroll bar, i have one problem.
while i click on an any row it autoscrolls itself to first row. I don't want it to autoscroll in this manner, because it affects my itemrenderer behaviour.
Thanks,
moorthi.Hi,
Thanks to reply me.
I am useing flex 3.5 Mx datagrid. i am using different item renderers in all columns. while i click on any row that will set as first row in datagrid.
I am sure that is a defult behavior of Mx.Datagrid. Because i didn't do that in my code.
If anyone faced this probelm, please reply. -
Hi All,
First let me explain my problem clearly.I am facing the
problem with refreshing datagrid for add,update,delete operations.
For adding task(todo app) i am using another mxml
component(PopUpwindow).when i do add,delete or update, changes are
happening
in database pakka and fine.There is no error in that.Only
problem is when i add or delete or update a task, datagrid has to
get refresh with the updated or new data.Then only from ui
user will know that he added a task or deleted a task etc right.
sometimes it's refreshing fine and sometimes not.If it
doesn't refresh at all times i can think of my logic.But if it's
happening sometimes and sometimes not.
after add or delete or update am using below 5 lines of code
to refresh datagrid.
getList.send(); //sending request again to load new data
using httpservice.
datagrid.dataProvider = resultList; //resultList is
bindabale ArrayCollection variable.
resultList.refresh(); //this line not all giving any
changes.i think it's not working
datagrid.validateDisplayList();
datagrid.validateNow();
Thnaks & Regards,
premadas.Hey harsha,
the following code i'm using for deleting a task.
<mx:HTTPService id="getTodo" url="
http://dev.edinc.in:8080/poc/ToDo/GetToDo.jsp"
result="resultHandler(event)"/>
private function delTask():void
delTodo.cancel();
delTodo.send(delData);
getTodo.send();
deltaskname.text = "";
deltaskdate.selectedDate = new Date();
deltaskcategory.selectedIndex = -1;
deltaskpriority.selectedIndex = -1;
deltaskstatus.selectedIndex = -1;
Anything i need to apply here.
Thanks & Regards,
Premdas. -
Dear All,
I have some problem with accessing DataGrid HeaderText, When one column is visable false.
"Click on column content and the code will show col # and header name. Do the same After Hide Colun is clicked"
Please check the following code
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script>
<![CDATA[
import mx.controls.listClasses.BaseListData;
import mx.controls.dataGridClasses.DataGridListData;
import mx.controls.dataGridClasses.DataGridItemRenderer;
import mx.events.ListEvent;
import mx.controls.*;
function grd_click(e:ListEvent):void{
var icol:int = e.columnIndex;
var column:DataGridColumn = DataGridColumn(grid1.columns[icol]);
var headerTxt:String = column.headerText;
Alert.show("Header text = " + headerTxt)
function hideCol(index:int):void{
var c:DataGridColumn = DataGridColumn(grid1.columns[index]);
c.visible = false;
var items:Array = [
{name:"vlad",lname:"collak"},
]]>
</mx:Script>
<!--<mx:DataGrid x="90" y="99" itemClick="test(event)" id="grid1" dataProvider="{items}">-->
<mx:DataGrid x="90" y="99" itemClick="grd_click(event)" id="grid1" dataProvider="{items}">
<mx:columns>
<mx:DataGridColumn headerText="Column 1" dataField="name"/>
<mx:DataGridColumn headerText="Column 2" dataField="lname"/>
</mx:columns>
</mx:DataGrid>
<mx:Button x="90" y="262" label="Hide Column" click="hideCol(0)"/>
<mx:Label x="90" y="56" text="Click on column content and the code will show col # and header name. Do the same After Hide Colun is clicked" width="642" height="35"/>
</mx:Application>
Regards,
SriI think the column still exists even if you set its visibility to false. You could try something like this
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns:local="*">
<mx:Script>
<![CDATA[
import mx.controls.listClasses.BaseListData;
import mx.controls.dataGridClasses.DataGridListData;
import mx.controls.dataGridClasses.DataGridItemRenderer;
import mx.events.ListEvent;
import mx.controls.*;
private function grd_click(e:ListEvent):void{
var icol:int = e.columnIndex;
var column:DataGridColumn = DataGridColumn(grid1.columns[icol]);
var headerTxt:String = column.headerText;
Alert.show("Header text = " + headerTxt)
private function hideCol(index:int):void{
if(index == 0)
grid1.columns = [column1];
else
grid1.columns = [column2];
[Bindable]private var items:Array = [
{name:"vlad",lname:"collak"},
]]>
</mx:Script>
<mx:DataGrid x="90" y="99" itemClick="grd_click(event)" id="grid1" dataProvider="{items}">
<mx:columns>
<mx:DataGridColumn id="column1" headerText="Column 1" dataField="name" />
<mx:DataGridColumn id="column2" headerText="Column 2" dataField="lname"/>
</mx:columns>
</mx:DataGrid>
<mx:Button x="90" y="262" label="Hide Column" click="hideCol(0)"/>
<mx:Label x="90" y="56" text="Click on column content and the code will show col # and header name. Do the same After Hide Colun is clicked" width="642" height="35"/>
</mx:Application> -
Datagrid scrolling problem when different items are in the same column
I have a datagrid which I am populating with different items (LinkButtons, Images, Labels). However when there are different types of items in the same column and when i try to scroll everything gets messed up (Images get overlapped with each other or the labels get overlapped with images).
I am overloading the "IDropInListItemRenderer" to create different types of items in each cell and I am overloding the "updateDisplayList" function
Any ideas as to why the items get messed up during scrolling? Is there some other preperty of IDropInListItemRenderer that should be overloaded?Hi Subeesh Arakkan,
Thanks. This is the exact problem that I have. Althought my overloaded functions are a little different and Im trying to resolve it. But htis is a good lead.
Thanks,
Prashanth -
Editable datagrid firefox problem
I have created an application that contains an editable
datagrid but experiences problems when using the firefox browser.
If there are multiple tabs of firefox open and an item is selected
in the grid, when switching between the firefox tabs, the datafield
in the grid becomes selected for edit without clicking on it. It
appears that some kind of event is being called to change an entry
in the grid. Similar results occur when changing between different
windows i.e. firefox and flex builder.
However, I don't have this problem when using internet
explorer.That should be true for any Flex component. Focus is always on something, you have to move it to a new place otherwise it gets restored back to what last had foucs.
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui -
Datagrid Scrolling Problem.. Does not fit into Parent Container..
Hi All,
I have a module and module contains only one datagrid. I am adding this module to tab navigator dynamically in the next index. I am using Text as Item renderer in the datagrid and the row height will change depending upon the data diplyed on the Text. When the data populate in datagrid the datagrid going beyond the containers layout. i.e height is not fit into parent container. I am using Canvas as parent container .. Please find the below attached pictures and you will get to know what is my problem?
Please help me to get out from this issue.. It is urgent..Thanks for quick reply
Here I am adding this module to canvas and the canvas is also dynamic . As you said "customize the measure() method in Text control and return the correct measuredHeight based on the explicitWidth." what is the relation between Text control height and datagrid? Datagird should take it's parent container width and heights. I am newbie to this Flex.. can you please explain it briefly. And if you have any Other way to do this please tell me .. it is very helpful to me.. Can you please post cusomized measure method if possible. please -
Datagrid hScrollPolicy problem with cellRenderer
Hi all, I'm having a problem which I can't seem to solve. I'm using a cellRenderer to display icons in a dataGrid. All works fine until I type in the command myDg.hScrollPolicy = "auto". Once I issue that command, the icons stop displaying. If I remove that line, all works well once more. Has anyone had this strange behaviour?
Not real sure. The components in AS2 are very strange. I didn't encounter that one before it was just a guess based on their pickiness(if that's a word). The AS3 components seem to be a major upgrade. I actually just built most of my components myself for AS2. They were light weight and easy to customize, however the datagrid is very difficult. Good luck!
-
I use flex sdk 3.
I have two datagrids sharing same data provider.
I have the folowing situation.
1. Each DataGrid has a CheckBox as itemEditor ( the DataGrid
are identical in first phase );
When i change the checkbox state in one , the change is
reflected to the second dataGrid, only when the item loose focus,
but i can`t intercept any change event on the data provider. (And i
tried ).
2. Because the Checkbox must be enabled or disabled based on
a third information in the item data, i use a custom simple item
renderer : a vbox handling a checkbox and an overrided data()
getter/setter for VBox.
I have "Bindable" tags and everything is broken for now. I
mean, the changes on data are not visible for the other, until i
call validateNow() for the unchanged DataGrid.
The question is what is wrong with the code and if this is
the only way to do it, for witch event to call validateNow() ?
see the codes"Oceanyahoo" <[email protected]> wrote in
message
news:gccvoq$pk2$[email protected]..
>I use flex sdk 3.
> I have two datagrids sharing same data provider.
> I have the folowing situation.
> 1. Each DataGrid has a CheckBox as itemEditor ( the
DataGrid are identical
> in
> first phase );
> When i change the checkbox state in one , the change is
reflected to the
> second dataGrid, only when the item loose focus, but i
can`t intercept any
> change event on the data provider. (And i tried ).
What did you try? I don't see where you've put in an event
handler for
itemEditEnd.
> 2. Because the Checkbox must be enabled or disabled
based on a third
> information in the item data, i use a custom simple item
renderer : a
> vbox
> handling a checkbox and an overrided data()
getter/setter for VBox.
> I have "Bindable" tags and everything is broken for now.
I mean, the
> changes
> on data are not visible for the other, until i call
validateNow() for the
> unchanged DataGrid.
>
> The question is what is wrong with the code and if this
is the only way to
> do
> it, for witch event to call validateNow() ?
Have you tried calling itemUpdated on the dataprovider
collection?
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