Spark DataGrid with Dynamic Column Width

Lets suppose I have a Spark Datagrid with no explicit typicalItem. When the Datagrid is initialized, the column widths are calcualted correctly based on the contents of the dataprovider. However if I add/remove an item from the dataprovider, or modify the one of the objects in the dataprovider, the column widths never update to reflect the change. Is the the correct behavior for a DataGrid? If so, is there any method I can call to force the DataGrid to recalculate and redraw the column widths?

When Spark DataGrid doesn't have a typicalItem, it uses the first dataProvider item as the typicalItem. If you change that, the DataGrid won't pick it up immediately. You can invalidate the current typicalItem using dataGrid.invalidateTypicalItem().

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DataGrid with dynamic columns & renderers

I'm developing using Flash Builder 4 & Flex SDK 4.1.
I need to manage very dynamic DataGrid components and keep their definitions, which are all part of a complex item renderer of an Offers list.
The objects structure is simplified as follows -
Data: Model --> Offers ArrayCollection --> Offer VO --> DataGrid data ArrayCollection & DataGrid columns Array
View: List --> Offer Item Renderer --> DataGrid
1. Since the DataGrid's columns property accepts only an Array (not ArrayCollection), it seems like Data Binding for defining the columns is very problematic.
I tried to bind it to the source property of an ArrayCollection that would keep my columns definitions, but it didn't really work (mainly header display bugs).
What is the recommended way to keep the dynamic columns definition of a DataGrid?
2. Each column can have a set of dynamic properties, so I created a "mutant" - Column VO that extends DataGridColumn and got a dynamic properties ArrayCollection on it.
The columns got a custom header renderer that includes an icon when there are properties.
The header renderers got 4 main states (NotSelectedWithProperties, SelectedWithProperties, NotSelectedWithoutProperties & SelectedWithoutProperties).
However, the header renderer area seems a bit buggy when maintaning dynamic columns.
Any thoughts on the subject?
3. Anyway, I ended up recreating the DataGrid's columns Array very often (copying the columns definition on the offer's item renderer's dataChange event handler).
Note that the dynamic properties can be edited when the column is selected and I copy their values from the view back to the model when entering the state NotSelectedWithProperties.
This feels way too complicated and I really try to keep it simple, inspite of the required complexity.
Does anyone have better ideas?
4. In some cases the column's item renderer should also be modified into another DataGrid (grid-in-grid).
I used the MXDataGridItemRenderer with a DataGrid and included an ArrayCollection for the "newValue" returned by the editor.
(I use RendererIsEditor=true and on updateComplete populate that variable with the DataGrid's dataProvider contents)
When needed, I loop though the data objects of the parent DataGrid and populate the related field with an ArrayCollection of key-value objects that are displayed on the internal DataGrid.
After adding this feature I encounter very strange bugs -
a. After editing the grid-in-grid values and changing the column's state (selecting & deselecting), I get the following exception:
ArgumentError. Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/setChildIndex()
at mx.core::UIComponent/setChildIndex().......6993....
All I could find about this is that it might be related to some context error or something, but I'm really stuck on this one.
b. Sometimes another column might copy value from one row to another, running over the previous value.
I'm not sure exactly what sequence of actions causes this behavior, but it's related to that itemRenderer for sure.
c. Switching places with a column that uses the grid item renderer (headerShift) causes a stak overflow of StyleManager that tried to get style from the DataGridItemRenderer. This one I just found out, but couldn't reproduce a second time... strange!
I'm pretty sure this caused another problem that I don't remember at the moment.
The bottom line is that there got to be a better way to implement this feature within this already-complicated environment.
Maybe I'm doing something very wrong here...
Please advice and thanks for reading all this.

Update on item 4a -
This was a major issue (the main reason for opening this thread really) and I managed to resolve it!
As part of my application, I override the default DataGrid behavior for column selection (headerRelease event).
Instead of sorting, I change the column's header looks and define it as Selected (for showing its dynamic properties and enable its deletion).
At first I did this by setting styles, but the look didn't refresh unless I created a new instance of the header renderer.
Later I changed thi behavior to work with states, but I left the new header renderer instance creation commands and those lines created all the mess!
Conclusion -
If you define a custom header renderer for your datagrid column and then a custom item renderer, don't create a new instance of your header renderer!
It would still be nice to get some response for the other issues I raised.
Thanks and have a nice week.

Trouble with DataGrid's last column width

I have a datagrid with thirty columns.
When I use the mouse to drag the window and resize its size,the last column width becomes more and more wide,and the previous column width is squeezed small.
If anybody else came accross the same problem,can you share your solution?
Thanks,
April

If horizontalScrollPolicy=”off” then there is an attempt to fit all columns within the width of the DG while respecting minWidth of the columns. Make sure the minWidths allow the columns you want to shrink can shrink.
However, there is still a chance of round-off error. I think the only solution may be to set the width of each column as you want it on a resize event from the DG.

Importing From Flat File with Dynamic Columns

HI
I am using ssis 2008,i have folder in which I have Four(4) “.txt” files each file will have 2 columns(ID, NAME). I loaded 4
files in one destination, but today I receive one more “.txt” file here we have 3 columns (ID, NAME, JOB) how can I get a message new column will receive in source. And how can I create in extra column in my destination table dynamically …please help me

Hi Sasidhar,
You need a Script Task to read the names and number of columns in the first row of the flat file each time and store it in a variable, then create a staging table dynamically based on this variable and modify the destination table definition if one ore more
new columns need to be added, and then use the staging table to load the destination table. I am afraid there is no available working script for your scenario, and you need some .NET coding experience to achieve your goal. Here is an example you can refer
to:
http://www.citagus.com/citagus/blog/importing-from-flat-file-with-dynamic-columns/
Regards,
Mike Yin
TechNet Community Support

Creating Query with dynamic columns to show results

Hi experts,
I need to know how to create a query with dynamic columns. Meaning, I don't want to create a query with fixed columns representing the 12 periods of the fiscal year to show me actuals as the fiscal year proceeds.
For example, if I am currently in the middle of period 3 (March) of a fiscal year, when I execute the query, I need it to automatically only show me the 'Actuals' for periods 1 and 2, without seeing the columns from periods 3 to 12 showing blank.
Then when I am in the middle period 5 (May) the query should ONLY show me the columns for periods 1 to 4 'Actuals', no results should be shown for periods 5 to 12 yet, and I don't want to even see blank columns for period 6 to 12.
How do I define my columns, to achieve this.
Maximum points will be awarded.
Thanks Everyone.

Hi Josh,
I'm having a little difficuluty understanding what should be included in my restricted key figures.
The time characteristics that I have available to use are:
0FISCPER3 (posting period)
0FISCYEAR (fiscal year), currently using SAP EXIT to default current fiscal year.
0FISCVARNT (fiscal year variant).
In addition, I have the following characteristics available to be used in the columns:
Value type (10)
version (currently I'm using variable for it)
Currency type (020)
Currency (USD).
Can you explain what my restricted key figure should be based on and how it should look.
I tried to create a restircted key figure using 0AMOUNT, and 0FISCPER3. For 0FISCPER3 I created a range from 1 to previous period (using SAP EXIT that supplied previous period).I also had value type, version, currency type, and currency included in that restricted key figure.Then when I tried to drag 0FISCPER3 under the restricted key figure once again, it wouldn't let me, probably because I've already used 0FISCPER3 in the restricted key figure.
Please let me know if my explanation is not clear.
Your step by step help would be great.
Thanks
Edited by: Ehab Mansour on Sep 23, 2008 2:40 PM

DataTable with dynamic columns

Does somebody have an example of how to code a h:dataTable with dynamic columns? I have seen hints about how to do it in these two articles:
http://forum.java.sun.com/thread.jspa?forumID=427&threadID=5218508
http://forum.java.sun.com/thread.jspa?threadID=577589&messageID=2909047
but a complete working example would be really helpful.
I think the key is understanding the "binding" parameter to h:dataTable but I'm having a hard time understanding it. Thanks.

I found it here:
http://balusc.blogspot.com/2006/06/using-datatables.html#PopulateDatatable

Logic to upload file with dynamic columns

hi
in my requirement i hav given to add logic to upload file with dynamic columns so that this upload program can be reused.
this way the program is flexible, irrespective of the number of columns in the file.
can any one explain this?
and let me know what actually i hav to do.

Check the program and the dynamic column is in the col_pos internal table and in the routines get_structure onwards.
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/scm/dynamic%2bstructures%2band%2bcomponents
cheers
Aveek

Difficult to achive the report layout with dynamic column names

I have a report layout as below.
So here the column names are dynamic.And each fixed row group has different calculations. I have a date parameter. If I select July 2013, then I need to show data from July 2012 to July 2013 with Columns(Jul-12, Aug-12...Jul-13). How to achive below layout
with dynamic columns?

Hi Sarayu_CM,
According to your description, you want to filter the records of prior year based on only one parameter selection. Right?
In this scenario, we can create two parameters. The first one is for user to select. The second parameter is based on the first parameter selection. We don't need to specify Available Values for the second parameter, but we should use expression to specify
Default Values based on the first parameter selection. Use the expression below:
=DateAdd("m",-12,FormatDateTime(Parameters!param1.Value))
Then we just need to apply a filter on the matrix/dataset to get the records which the date is between values in these two parameters.
If you have any question, please feel free to ask.
Best Regards,
Simon Hou

Dynamic DataGrid with Preferred columns

Hi all,
I want to populate a dynamic DataGrid with User Preferred
columns (ex : EmpId,First Name and Phone). Each time columns may
change based on User Selection in Preferences Page so columns
should not hard code. I'm able to see data for EmpId, First Name
but I want to see the Inner tag data of "Phone" as a Field.
Sample XML ....
<emp>
<empId>1002</empId>
<firstName>Smith</firstName>
<lastName>John</lastName>
<address>
<city>Ohio>
<phone>433-234-322</phone>
<zip>60003</zip>
</address>
</emp>
Thanks.

To display nested data, you must use a labelFunction. I have
several labelFunction examples on cflex.net.
You can assign a function reference to the column's
labelFunction property in the column generation code.
Tracy

Spark DataGrid with Safari

Hello,
I tried today spark datagrid and used the examples from Adobe Help. But when testing with Safari I have problems with the cursor.
For instance when I resize the column width, I can't see the cursor anymore, I have to click first outside datagrid to make the cursor
visible again. But I can move the cursor, can click even see the cell color changing but without exactly knowing where the cursor is.
Is this a known issue?
With Firefox there is no problem.
Thanks for your help.
Kind regards,
ND

The most recent Safari browser does not work well with the debugger player. I’ve had to switch to another browser.

How to set dynamic column width for analysis item

Dear Experts,
I have a query view which is added in the web template as an analysis item. The web item properties on width is not working - I tried entering a value in the width but when I execute the template, the query view's width still stays the same.
Module com.sap.ip.bi.rig.ColumnWidth don't seem correct because I don't want the column width to be static. As my number of columns may change, I wanted the overall width of my query view to stay the same.
Appreciate any ideas which can solve this issue
Thanks and Regards,
huimin
BW newbie

Hi Huimin,
I don't think it is possible to fix the width of the Analysis webitem since it dynamically adjusts its width based on the text maxlength within its cells. Unless you use com.sap.ip.bi.rig.ColumnWidth where the cols are static, you cannot achieve this.
Even if you do override the css settings using a cell padding or something, the portal settings would override the same. How about using a Report webitem to insert tables/charts & check if the width can be adjusted here - just a thought.
--Priya

Dynamic Column width for a report

Will the width property of a column be able to be set at run-time (i.e. ability to set the width of a column to an expression) in SQL Reporting Services 2008? One problem I have seen is the inability to set the width of columns in a report when you you have several columns whose order is determined based on parameters.
Lets say I have 2 columns in a report and two fields from the database which will populate those columns: 1 field that is varchar(5) and one which is varchar(50). If I do not know which column each field will go to until runtime how am I supposed to adjust the column width? Letting the column width be set by an expression would solve everything as I could pass the width in to the report. As it stands now, I would have to set each column's width to accomodate a field of type varchar(50) in order to avoid wrapping of data.
You could say just create 2 reports, one for each case, but what if I had 15 fields? 20?
Has anyone figured out how to dynamically set the width of a column? Will the width of a column be able to be set at run-time in SQL Server Reporting Services 2008 via expression or some other means?
Questions, questions, questions.
Chuck

Ok slight update
RDL xml files are used during deisgn of reports but when you deply they go into the Content column of a table called Catalog:
SELECT [Name],
CAST(CAST([Content] AS VARBINARY(MAX)) AS XML) AS reportXML
FROM [Catalog]
WHERE type = 2
So I think this can be edited programmatically. Widths can be found like this:
        <TableColumns>
          <TableColumn>
            <Width>9cm</Width>
          </TableColumn>
          <TableColumn>
            <Width>3.02646cm</Width>
          </TableColumn>
          <TableColumn>
            <Width>3.25cm</Width>
          </TableColumn>
          <TableColumn>
            <Width>3.5cm</Width>
          </TableColumn>
          <TableColumn>
            <Width>3.5cm</Width>
          </TableColumn>
        </TableColumns>

Problem with dynamic column in SBWP

Hi Friends,
In SWL1 I have created two attributes with header as "CANCELLED" and " DESCRIPTION" for a particular task.But my SBWP is still showing columns as "Dynamic column" for the workitems of that task.
Please help me on this.
Thanks.
Dilip

Hi Dilip,
The column headings will only appear in the task-specific view. In other words, by default the headers will be generic because you can have mixed tasks in the worklist, and column 1 can be a date for one task and a company name for another.
The user needs to expand the tree on the left hand side and navigate to the "Approve Purchase Order" (or whatever) node to show only items of that task, then column headers should show up.
Regards,
Mike

Problem with dynamic columns in smartforms.

Dear SDN Experts,
I have a requirement in smartforms for dynamic columns.
i have used template with 10 columns, So from these 10 columns,Columns may vary monthly MIN 2 to MAX 10 depending on
readings with them for that month.
i cannot fix column headings also,Because headings also changes dynamically.
So Problem is if there is no data in columns,Columns is displayng empty.
For EX: In this month i have 2 columns data remaining all columns is displaying empty boxes.
Please suggest me a solution is this posible in smartforms if i use table also.
<removed by moderator>
Regrds,
MNR
Edited by: Thomas Zloch on Sep 11, 2011 3:50 PM

Hi friend,
See the link below it is having the solution of hiding the columns in smart forms
Hide table columns in smart form?
Create a table to display your values with 12 col and hide the columns based on the idea provided in the link above.
I think this will solve your issue if you still have queries please revert back to me i will help you.
Thanks,
Sri Hari

GoNav function with dynamic columns 10g

Hi,
I have a report with a dashboard prompt that dynamic change the report column. The result of this prompt is set into a presentation variable @{dimension}.
Now I want to use the GoNav function on the column that dynamically changes.
The data format for this column should be:
@[html]"<font class="Nav" onclick=\"javaScript:GoNav(event, '/users/Administrator/Test', 'Department', 'Department_name' ,'"@"','_self');\">"@"".
But this syntax only works for the column Department.Department_name. If the prompt on the dashboard is changed to another column the navigate link doesn't work anymore.
Is there a solution to make this work so that also the column can be set dynamically for the navigation?

I have a report with a dashboard prompt that dynamic change the report column. The result of this prompt is set into a presentation variable @{dimension}.
Now I want to use the GoNav function on the column that dynamically changes.
The data format for this column should be:
@[html]"<font class="Nav" onclick=\"javaScript:GoNav(event, '/users/Administrator/Test', 'Department', 'Department_name' ,'"@"','_self');\">"@"".
But this syntax only works for the column Department.Department_name. If the prompt on the dashboard is changed to another column the navigate link doesn't work anymore.
As per your comments above you are using Column selector kind of functionality using a Dashboard prompt and in your GO nav you are taking column Department that's way it is working for that column only , if you change the Column in Dashboard prompt also still GO nav point to Department column only...make the GO NAV to take dynamic columns..
I am not sure whether we can pass presentation variable .....with my knowledge its not..use GO URL instead of GO NAV

Spark DataGrid with Dynamic Column Width

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