Flex datagrid itemRenderer with different states

Hi,
I have a datagrid with allowMultipleSelection="true" & itemRenderer as my custom component. The custom component have 2 states "NORMAL" & "EXPANDED".
Now on row selection the renderer should change its state from NORMAL to EXPANDED state. And if I am selecting multiple rows then all the selected rows should be in EXPANDED state.
As soon as the selection goes the renderer should retain its NORMAL state.
I am stuck. Please help me out.
Thanks in advance.

Use itemclick property of grid and it passes ListEvent to the method given for itemclick. use selectedindices or selectedcells property in grid to find which are selected and change the states for the renderers of selected rows. U can get the renderer for the current selected row using event.itemRenderer property. Hope this helps.

Similar Messages

DataGrid itemrenderer with switch statement

Hi,
I have datagrid control with this columns
<mx:DataGrid id="dgvParagraphs" >
    <mx:columns>
        <mx:DataGridColumn dataField="type" headerText="Type"/>
        <mx:DataGridColumn dataField="title" headerText="Title"/>
        <mx:DataGridColumn dataField="content" visible="false"/>
    </mx:columns>
</mx:DataGrid>
Under type column I have values from 1 to 6. Each number presents type of content. I have icons for each type. I would like to show icon instead of just number. I know this can be done using itemrenderes but I don't know how to accomplish this.

If this post answers your question or helps, please mark it as such.
Greg Lafrance
www.ChikaraDev.com
Flex Development and Support Services
You might see issues with this code during scrolling, as DataGrid recycles itemRenderers, but in that case the icon information must be in the data.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
    <![CDATA[
      public function getImageSource(item:Object):String{
        var retVal:String;
        switch(uint(item.type)){
          case 1:
            retVal = "black.png";
            break;
          case 2:
            retVal = "blue.png";
            break;
          case 3:
            retVal = "gray.png";
            break;
          case 4:
            retVal = "green.png";
            break;
          case 5:
            retVal = "purple.png";
            break;
          case 6:
            retVal = "red.png";
            break;
        trace(retVal);
        return retVal;
    ]]>
</mx:Script>
<mx:DataGrid id="dgvParagraphs" dataProvider="{dataXML..item}">
    <mx:columns>
      <mx:DataGridColumn dataField="type" headerText="Type" width="50">
        <mx:itemRenderer>
          <mx:Component>
            <mx:Image source="{outerDocument.getImageSource(data)}" horizontalAlign="center"/>
          </mx:Component>
        </mx:itemRenderer>
      </mx:DataGridColumn>
      <mx:DataGridColumn dataField="title" headerText="Title" width="100"/>
      <mx:DataGridColumn dataField="content" visible="false"/>
    </mx:columns>
</mx:DataGrid>
<mx:XML id="dataXML" xmlns="">
    <data>
      <item>
        <type>2</type>
        <title>My Title 1</title>
        <content>Content 1</content>
      </item>
      <item>
        <type>5</type>
        <title>My Title 2</title>
        <content>Content 2</content>
      </item>
      <item>
        <type>3</type>
        <title>My Title 3</title>
        <content>Content 3</content>
      </item>
      <item>
        <type>1</type>
        <title>My Title 4</title>
        <content>Content 4</content>
      </item>
      <item>
        <type>4</type>
        <title>My Title 5</title>
        <content>Content 5</content>
      </item>
      <item>
        <type>6</type>
        <title>My Title 6</title>
        <content>Content 6</content>
      </item>
      <item>
        <type>2</type>
        <title>My Title 7</title>
        <content>Content 7</content>
      </item>
      <item>
        <type>1</type>
        <title>My Title 8</title>
        <content>Content 8</content>
      </item>
      <item>
        <type>4</type>
        <title>My Title 9</title>
        <content>Content 9</content>
      </item>
      <item>
        <type>5</type>
        <title>My Title 10</title>
        <content>Content 10</content>
      </item>
      <item>
        <type>2</type>
        <title>My Title 11</title>
        <content>Content 11</content>
      </item>
    </data>
</mx:XML>
</mx:Application>

Custom JButton with different states, any ideas??

Hey, hope you guys can help.
What I want to do is to implement a custom JButton class with different states for the button. The button should have a "pressed" state, where the user has pressed it, and if the action triggered by this pressing gets approved, it should get selected. It will then get a different color and border.
I will have several buttons of this type in one panel, and they can all have different states at any time.
I do not want to use JToggleButton, as it is not the user that decides if it should be selected or not, but the logic "behind" (the dataflow).
So I want like a combination of JButton and JToggleButton...
How do I do this, any ideas, please?

I am not to sure if this is the idea you have in mind but...
This is something i have used before it is a tool bar. the button could be managed by another event it is an event listener at the moment.
As well as update only a specified button rather than all?
public class ToolBar extends JToolBar {
    public ToolBar(EventListener el) {
        this.setName("ToolBar");
        String[] imageFiles = { "Left.gif", "Relationgif", "Reload.gif", "TrafficRed.gif", "Home.gif", "Print.gif", "Help.gif" };
        String[] toolbarLabels = { "Entity", "Relationship", "Reload", "Stop", "Home", "Print", "Help" };
        Insets margins = new Insets(3, 3, 3, 3);
        for(int counter = 0; counter < toolbarLabels.length; counter++) {
            ToolBarButton button = new ToolBarButton(imageFiles[counter]);
            button.setToolTipText(toolbarLabels[counter]);
            button.setMargin(margins);
            button.setName(imageFiles[counter]);
            button.setVerticalTextPosition(BOTTOM);
            button.setHorizontalTextPosition(CENTER);
          // button.setMnemonic(KeyStroke.VK_CAPS_LOCK);
            button.addActionListener(el);
            add(button);
    public void setTextLabels(boolean showLabels) {
        Component c;
        int i = 0;
        while((c = getComponentAtIndex(i++)) != null) {
            ToolBarButton button = (ToolBarButton)c;
            if (showLabels)
                button.setText(button.getToolTipText());
            else
                button.setText("");
//each button on the tool bar is an object of this class
public class ToolBarButton extends JButton {
    private static final Insets margins = new Insets(3, 3, 3, 3);
    //user selected to view tool bar as image only (default)
    public ToolBarButton(Icon icon) {
        super(icon);
        setMargin(margins);
    //user selected to view tool bar as text only
    public ToolBarButton(String iconName) {
        this(new ImageIcon(iconName));
    //user selected to view tool bar as image and text
    public ToolBarButton(String iconImage, String iconName) {
        this(new ImageIcon(iconImage));
        setText(iconName);
}

Datagrid ItemRenderer with LinkButton.

I have one of the columns in my DataGrid which needs to be a LinkButton. The actual data value is 0 or 1 but I want the LinkButton to be visible only if the data value is 1. The problem is that LinkButton is always visible. How can I selectively make it visible or invisible on different rows of DataGrid ? I tried making the visible attribute bound with the value of the flag but no success.
<mx:DataGridColumn itemRenderer="LinkButtonItemRenderer" dataField="flag" />
Following is the LinkButtonItemRenderer code.
<mx:LinkButton xmlns:mx="http://www.adobe.com/2006/mxml" visible="{data.flag == 1}" label="Click Me" />

Hi MoreGart,
You can try this...
<mx:LinkButton xmlns:mx="http://www.adobe.com/2006/mxml" render="(Number(data.flag) == 1)?(visible = true):(visible = false)" label="Click Me" />
Try this ans let me know...
Thanks,
Bhasker

Problem with Datagrid itemrenderer with a Datagrid

Hi all,
I have this kind of a structure. I try to use a datagrid item renderer in a data grid column. However when I try to move rows inside the same datagrid I experience a problem. When my datagrid loads first it seems correct, but when I drag and drop a row in the same datagrid inner datagrids start to be drew in wrong rows. I checked the DB but there are no mistakes in DB records. Problem is with rendering. I suppose inner datagrids trying to draw to early or datagrid component is trying to reuse the itemrenderer. I could not find any solutions for that. Any help will be greatly appreciated..
<mx:DataGridColumn width="130" editable="false"
          headerText="{resourceManager.getString('resources', 'acl.content')}">
          <mx:itemRenderer>
               <mx:Component>
                    <ACLInnerDataGrid rowCount="3"     dragEnabled="true"     dropEnabled="false"
                    x="0" y="0"     editable="true" dragInitiatorId="catGrid"
                    filterGroupName="content" remoteDestination="zend"
                    remoteSource="ACLFilterParamService" showHeaders="false"
                    creationComplete="this.init();">
                         <columns>
                              <mx:DataGridColumn dataField="id" editable="false" visible="false"/>
                              <mx:DataGridColumn dataField="ruleId" editable="false" visible="false"/>
                              <mx:DataGridColumn dataField="filterKey" editable="false" visible="false"/>
                              <mx:DataGridColumn dataField="param" editable="false" visible="false"/>
                              <mx:DataGridColumn dataField="name" editable="true"/>
                         </columns>
                    </ACLInnerDataGrid>
               </mx:Component>
          </mx:itemRenderer>
</mx:DataGridColumn>
Thanks in advance.

I have attached the item renderer component source code.

Flex List ItemRenderer : Change States from parent ?

Hai there,
So i created a list that uses an arrayCollection as dataProvider and an itemRenderer with 2 states : LabelState and ProgressState, the labelState is the start state and shows a Filename, the progressState is the state i need to change to when i press a "Start Upload" Button.
This is the itemrenderer :
<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
autoDrawBackground="true" currentState="LabelState" width="800">
<s:states>
<s:State name="LabelState" />
<s:State name="ProgressState" />
</s:states>
<fx:Declarations>

</fx:Declarations>
<fx:Script>
<![CDATA[
public function changeState():void
trace("changing state for " + label_field.text);
this.currentState = "ProgressState";
trace(this.currentState);
]]>
</fx:Script>
<s:Label name="label_field" paddingLeft="10" maxHeight="40" paddingTop="10" paddingBottom="10" id="label_field" width="800" color="#333333" includeIn="LabelState" text="{data.label}"/>
<mx:ProgressBar id="progress_field" left="3" top="3" bottom="3" mode="manual" chromeColor="#0096FF" includeIn="ProgressState" textAlign="center" labelPlacement="center" maximum="100" color="#FFFFFF" right="3"/>
</s:ItemRenderer>
This is the code for the List :
<s:List keyUp="lst_selected_files_keyUpHandler(event)" skinClass="styles.skins.ListSkinNoHorizontal"
borderVisible="false"
contentBackgroundColor="#c9c9c9" contentBackgroundAlpha="1"
id="lst_selected_files"
width="100%" height="100%"
alternatingItemColors="[#EAEAEA,#FAFAFA]" color="#000000"
itemRenderer="components.ProgressLabel" dataProvider="{arr_items}" />
<components:RemoveBar nr_of_items="{arr_items.length}" id="cmp_removeBar" hermesRYA="cmp_removeBar_hermesRYAHandler(event)" bottom="-35" width="100%" height="35" />
This is the function that changes the states for the current "to be uploaded file":
protected function uploadNextFile():void
if(uploadingFile!=null) uploadingFile==null;
popup = null;
popup = new ProgressPanel();
lst_selected_files.selectedIndex = currentUploadNr;
current_progressItem = lst_selected_files.dataGroup.getElementAt(currentUploadNr) as ProgressLabel;
current_progressItem.changeState();
lst_selected_files.validateNow();
For some reason the states change ... but the elements aren't visually updated, ... meaning that i still see the label and the progressbar isn't visible :/
anyone ?

This seems to work for me:
<s:Application
    xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/mx" >
    <s:controlBarContent>
        <s:Button label="test" click="(list1.dataGroup.getElementAt(0) as Object).test()" />
    </s:controlBarContent>
    <s:List id="list1">
        <s:dataProvider>
            <s:ArrayList>
                <fx:Array>
                    [0,1,2]
                </fx:Array>
            </s:ArrayList>
        </s:dataProvider>
        <s:itemRenderer>
            <fx:Component>
                <s:ItemRenderer>
                    <fx:Script>
                        <![CDATA[
                            public function test():void {
                                currentState = 'state2';
                        ]]>
                    </fx:Script>
                    <s:states>
                        <s:State name="state1" />
                        <s:State name="state2" />
                    </s:states>
                    <s:Rect width="50" height="50">
                       <s:fill>
                           <s:SolidColor color.state1="red" color.state2="green" />
                       </s:fill>
                    </s:Rect>
                    <mx:ProgressBar includeIn="state2" />
                </s:ItemRenderer>
            </fx:Component>
        </s:itemRenderer>
    </s:List>
</s:Application>
You will probably want to override getCurrentRendererState() to do this properly tho. This post demonstrates how to use DataRenderer instead if you would rather: http://flexponential.com/2010/02/07/using-datarenderer-to-add-custom-states-to-a-spark-lis t-renderer/
In general you shouldn't interact with the renderers of a List directly (via getElementAt), but rather by changing the data in the List and building an ItemRenderer that reacts to those changes. So it would be better if you did something like list1.dataProvider.getItemAt(0).changeState = true and then in your renderer override the data setter to change the state if that variable is set.

DataGrid - ItemRenderer - WordWrap

I have added an itemrenderer to a datagrid to change the
color of individual rows based on the value of of a cell. However,
the problem I am having is this. The word-wrap no longer works for
the datagrid. I imagine this is because I use a lable in my
itemrenderer. I have not been able to find just a good solution
that makes the cells look just like the normal datagrid, but with
different colors.
Any suggestions would be greatly appreciated.
Enclosed is the itemrenderer
<?xml version="1.0" encoding="utf-8"?>
<mx:Label xmlns:mx="
http://www.adobe.com/2006/mxml"
>
<mx:Script>
<![CDATA[
import mx.controls.listClasses.ListData;
import com.vo.HistoryDataValueObject;
import com.model.Model;
override protected function
updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
super.updateDisplayList(unscaledWidth,unscaledHeight);
if (data != null && (data is HistoryDataValueObject)
if (data.monetaryAmount.indexOf("-",0) ==
data.monetaryAmount.length-1 )
setStyle("color", 0xFF0000);
else
setStyle("color", 0x000000);
]]>
</mx:Script>
</mx:Label>

I have added an itemrenderer to a datagrid to change the
color of individual rows based on the value of of a cell. However,
the problem I am having is this. The word-wrap no longer works for
the datagrid. I imagine this is because I use a lable in my
itemrenderer. I have not been able to find just a good solution
that makes the cells look just like the normal datagrid, but with
different colors.
Any suggestions would be greatly appreciated.
Enclosed is the itemrenderer
<?xml version="1.0" encoding="utf-8"?>
<mx:Label xmlns:mx="
http://www.adobe.com/2006/mxml"
>
<mx:Script>
<![CDATA[
import mx.controls.listClasses.ListData;
import com.vo.HistoryDataValueObject;
import com.model.Model;
override protected function
updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
super.updateDisplayList(unscaledWidth,unscaledHeight);
if (data != null && (data is HistoryDataValueObject)
if (data.monetaryAmount.indexOf("-",0) ==
data.monetaryAmount.length-1 )
setStyle("color", 0xFF0000);
else
setStyle("color", 0x000000);
]]>
</mx:Script>
</mx:Label>

Custom ItemRenderer with dynamic field associations?

Hi All,
I'm trying to create a custom itemrender control that isn't tied to a specific type of data input. I'm creating a thumbnail itemrenderer to be used with the Sparks List control:
<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer
xmlns:fx="
http://ns.adobe.com/mxml/2009" xmlns:s="
library://ns.adobe.com/flex/spark" xmlns:mx="
library://ns.adobe.com/flex/mx" autoDrawBackground="
true"
>
<s:layout>
<s:BasicLayout/>
</s:layout>
<mx:Image left="
5" right="
5" bottom="
25" top="
5" id="
img_thumbnail"source="
{data.image}"
/>
<s:Label
left="
5" right="
5" bottom="
5" verticalAlign="
middle" textAlign="
center" id="
lbl_label" fontWeight="
bold" fontSize="
10"text="
{data.label}"
/></s:ItemRenderer>
However, as you can see, the image source and label text properties are tied to specific fields in the data collection (image and label). I would like to provide a way to figure out what the label and icon fields are set to in the parent control, and set them accordingly in the itemrenderer. This should allow me to use the same itemrenderer with different objects, as long as they have a text and image property.
Any ideas? Thanks

After doing some research, I found my answer:
1) The data object is the current item which the List component is populated with. You can access any properties of the object using it. (Not what I'm looking for here.)
2) You can access the label property set by the labelField or labelFunction properties of the list control in the item renderer simply using this.label. This is exactly what I was looking for.

Two buttons with different ids keep overwriting eachothers onclick

My flex app has 2 different states ('Employee Results' and 'Place Results') all based on one original base state (so three total)
I have a search button called searchbtn on one view state.
I have a search button called searchbtn2 on another view state.
They both are in their own unduplicated control bars, meaning I didn't copy and paste from one screen to the other.
I have assigned an onclick event of currentState='Employee Results' to the searchBtn.
I have assigned an onclick event of currentState='Place Results' to the searchBtn2.
The problem is this.
When I assign the event to the searchBtn it works.
When I go to the next view state and assign the event to searchBtn2, the searchBtn is overwritten with the same onclick that is in searchBtn2.
Why is this happening and how do I get around it?

Sorry. It was the way I was nesting things. I had forgotten some closing
tags.
Thank you!
The soul of a journey is liberty, perfect liberty, to think, feel, do just
as one pleases.
William Hazlitt, "On Going a Journey," 1822

Datagrid itemrenderer list rowcount not changing with data

I have a datagrid with an itemrenderer. the itemrenderer is a list component. I populate the list with different values for each datagrid row. this works fine. However, I want the list to reset the rowcount for each datagrid row. This is not happening. if the first datagrid row list box is 3 rows every list box in that column is 3 rows no matter what i do. here's my code:
<mx:List xmlns:mx="http://www.adobe.com/2006/mxml" rowCount="1">
<mx:Script>
<![CDATA[
   import mx.utils.ObjectProxy;
   import mx.collections.ArrayCollection;
   import mx.utils.ArrayUtil;
   [Bindable] private var arr:Array;
   override public function set data( value:Object ) : void
    super.data = value;
    if(value != null && value.MEET is ArrayCollection)
     var len:Number = value.MEET.length;
     arr = new Array();
     for each (var obj:ObjectProxy in value.MEET){
      arr.push(obj.DAYS);
     this.dataProvider = arr;
     //labelField = "DAYS";
     this.rowCount = len;
    else if (value != null && value.MEET is ObjectProxy )
     this.rowCount = 1;
     this.dataProvider = value.MEET;
     this.labelField = "DAYS";
    else
     this.rowCount = 1;
]]>
</mx:Script>
</mx:List>

Hello !
This trick makes my application freeze...
I've just an advancedDatagrid populated with arrays, and a list as renderer on some of its columns... I've got exactly the same problem (rowCount that is always the same, for all of my renderers instances), but your solution doesn't work it out...
Any idea ?
thanks a lot

Happy Holidays. I have Adobe Actobat 7.0 Standard for quite a while, and I'm happy with it. I use it for mainly filings at the federal court. They require PDF. I use two computers in two different states for work. I realize my Adobe 7.1 is a few years

. I have Adobe Actobat 7.0 Standard for quite a while, and I'm happy with it. I use it for mainly filings at the federal court. They require PDF. I use two computers in two different states for work. I realize my Adobe 7.1 is a few years old, but sometimes I have difficulty using it with the other days downloading a boarding pass, and e filing at the USDC. . There's a problem with Adobe Flash, media, etc. and other Adobe programs, (which I use for downloading boarding passes for airlines, etc.) so basically I have to delete these other Adobe programs, besides the Adobe Acrobat 7.0 Standard if I want to 7.0 Standard to work. I periodically download the updates, but there's still a problem. My question is: Can or should I purchase another program to update the present Adobe Acrobat 7.0 standard, or just buy a new program such as the Adobe 11? Am I mistakenly doing something wrong, such as when I download? I'm an old valued customer so I don't want to spend a lot of money since I am replacing my Dell XP for a new computer now, and my other computer is a Dell Vista.
I'd appreciate your valued advice.

If you are getting a new computer (for a PC it would have Win 7 or 8), then you will need to purchase XI if you wish to continue using Acrobat. Acrobat 7 is not compatible with these systems (and probably the same for MAC systems), though sometimes workarounds are possible, though not easy to use. I guess the answer is to buy the new version. Try http://www.adobe.com/products/catalog/software._sl_id-contentfilter_sl_catalog_sl_software _sl_mostpopular.html, click on the Buy for Acrobat, and then select the version you want.

Upload bank statements interface(with different layouts)

HI
My component is upload bank statements interface(with different layouts) .
to which module it belongs exactly.And how to proceed with this....
plz give u r sugessitions.................
pavan kumar

firstly go through the documentation and TRMs
if you have any doubt in the coding . the send the code and errors encountered
so, that we can help you.

Copy financial statement version with different chart of accounts

Hi all,
it is possible to copy financial statement version with different chart of accounts? If I copy the financial statement version, the Financial statement items are assign from the chart of accounts which were in the original financial statement version.
But I need to change the chart of accounts and accounts assignment as well. Is this somehow possible?
Thanks
Miroslav

Hi,
It does not make much sense, as FSV is based on chart of accounts. You will have to build your FSV from the scratch.
Regards,
Eli

[OCI] Parameter Binding, repeated Statements with differing values

Hello
I am working on an application written in C which sends about 50 different SQL Statements to an Oracle Database using OCI. These Statements are executed repeatedly with different values.
In order to improve performance I would like to know what possibilities I have.
Whats the benefit of the following "techniques" ?
- Parameter Binding
- Statement Caching
What else could I look into?
with friendly greetings.

It doesn't take zero-time of course, and it does level-off after a while, but array-bind/define or pre-fetching can make a significant impact on performance:
truncated table: 0.907 / 0.918
insert_point_stru_1stmt_1commit: x100,000: 0.141 / 0.144Above I truncate the table to get repeatable numbers; deleting all rows from a previous run leaves a large free list (I guess...), and performance of this little contrived benchmark degrades non-negligeably otherwise. This is a single array-bind insert statement.
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@0: 7.594 / 7.608
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@1: 4.000 / 4.004
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@10: 0.906 / 0.910
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@100: 0.297 / 0.288
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@1,000: 0.204 / 0.204
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@10,000: 0.265 / 0.268
fetched 100,000 rows. (0 errors)Above I do a regular "scalar" define, but turn pre-fetching on (default is one row, but I tested with pre-fetching completly off too). @N means pre-fetch N rows.
select_points_array: x100,000@10: 0.969 / 0.967
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@100: 0.250 / 0.251
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@1,000: 0.156 / 0.167
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@10,000: 0.156 / 0.157
fetched 100,000 rows. (0 errors)Above I use array-defines instead of pre-fetch.
select_points_struct: x100,000@10: 0.938 / 0.935
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@100: 0.219 / 0.217
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@1,000: 0.140 / 0.140
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@1,000: 0.140 / 0.140Above I use array-of-struct defines instead of pre-fetch or array-bind. Performance is just a little better, probably because of better memory "locality" with structures.
The table is simple:
create table point_tab(
id number,
x binary_float,
y binary_float,
z binary_float
So each row is 22 + 4 + 4 + 4 = 34 bytes. There are no constraints or indexes of course to make it as fast as possible (this is 11g on XP win32, server and client on the same machine, single user, IPC protocol, so it doesn't get much better than this, and is not realistic of true client-server multi-user conditions).
There aren't enough data point to confirm or not your prediction that the advantage of array-bind level-off at the packet size threshold, but what you write makes sense to me.
So I went back and tried more sizes. 8K divided by 34 bytes is 240 rows, so I selected 250 rows as the "middle", and bracketed it with 2 upper and lower values which "double" up or down the number of rows:
truncated table: 0.953 / 0.960
insert_point_stru_1stmt_1commit: x100,000: 0.219 / 0.220
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@67: 0.329 / 0.320
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@125: 0.297 / 0.296
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@250: 0.250 / 0.237
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@500: 0.218 / 0.210
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@1,000: 0.187 / 0.195
fetched 99,964 rows. (0 errors)
select_points_array: x99,964@67: 0.297 / 0.294
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@125: 0.235 / 0.236
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@250: 0.203 / 0.206
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@500: 0.188 / 0.179
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@1,000: 0.156 / 0.165
fetched 99,964 rows. (0 errors)
select_points_struct: x99,964@67: 0.250 / 0.254
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@125: 0.203 / 0.207
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@250: 0.172 / 0.168
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@500: 0.157 / 0.152
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@1,000: 0.125 / 0.129As you can see, it still gets faster at 1,000, which is about 32K. I don't know the packet size of course, but 32K sounds big for a packet.
truncated table: 2.937 / 2.945
insert_point_stru_1stmt_1commit: x100,000: 0.328 / 0.324
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@1,000: 0.250 / 0.250
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@2,000: 0.266 / 0.262
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@3,000: 0.250 / 0.254
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@4,000: 0.266 / 0.273
fetched 100,000 rows. (0 errors)
select_first_n_points: x100,000@5,000: 0.281 / 0.278
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@1,000: 0.172 / 0.165
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@2,000: 0.157 / 0.159
fetched 99,000 rows. (0 errors)
select_points_array: x99,000@3,000: 0.156 / 0.157
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@4,000: 0.141 / 0.155
fetched 100,000 rows. (0 errors)
select_points_array: x100,000@5,000: 0.157 / 0.164
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@1,000: 0.125 / 0.129
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@2,000: 0.125 / 0.123
fetched 99,000 rows. (0 errors)
select_points_struct: x99,000@3,000: 0.125 / 0.120
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@4,000: 0.125 / 0.121
fetched 100,000 rows. (0 errors)
select_points_struct: x100,000@5,000: 0.125 / 0.122Above 32K, there doesn't seem to be much benefit (at least in this config. My colleague on linux64 is consistently faster in benchmarks, even connecting to the same servers, when we have the same exact machine). So 32K may indeed be a threshold of sort.
In all, I hope I've shown there is value in array-binds (or defines), or even simple pre-fetching (but the latter helps in selects only). I don't think one can very often take advantage of it, and I have no clue how it compares to direct-path calls, but value there is still IMHO. --DD

Flex DataGrid with Dynamic Grouping

Does anyone know of any examples of Flex datagrids that have
grouping features comparable to the numerous grid components
available in the ASP.NET world? I’m thinking of .NET
component vendors such as Telerik, Infragistics, Component Art,
DevExpress, etc.
The way these .NET controls generally work is that you drag
the header of a column to a bar above the grid, which causes the
grid to redraw based on the new grouping you just specified.
This is an example of a grid component that I am currently
using:
Telerik
Grid
Thank you,
Mike Chabot

The renderer's data property is the data for the entire row so you can get the column1 data and assign the combobox's dataprovider accordingly.
Alex Harui
Flex SDK Developer
Adobe Systems Inc.
Blog: http://blogs.adobe.com/aharui

Flex datagrid itemRenderer with different states

Similar Messages

Maybe you are looking for