Custom component property value handling at run time

Question

I would like to develop simple custom component which has three properties PROP1, PROP2 & RESULT . These parameters are bound to excel sheet cells as follows..
cell A1 connected to PROP1
cell A2 connected to PROP2 and
cell A3 connected to RESULT.
In excel A1 cell has excel formula set as =IF(A2<5,10,0).
Custom component would be simple button display at runtime and on click of the same, I would like to perform following actions in sequence with N number of times.
1. First push any random number to PROP2. (which is simple task, I believe)
2. Pick new value of PROP1 which is changed due to existance of excel formula (+ using dispatchevent I could able to pass value to excel cell A2. But not able to read new value of PROP1+)
3. check new PROP1 value equal to 10. If it is 10 then count it otherwise again push new random value to PROP2.
4. Continue step 1 to 3 till N number of times. and finally
4. Push number of counts for PROP1 value 10 to RESULT parameter.
All the parameters are bindable (getter/setter with [Bindable]) in Flex component application and flex propertysheet application use binding ID to bind with cell address. with binding direction BOTH and SINGLETON
Here is flex function code which triggered at button click.
public function test002():void {
while ( N < 100)
  this.PROP2 = Math.round(Math.random()*1000);
  dispatchEvent(new PropertyChangeEvent(PropertyChangeEvent.PROPERTY_CHANGE, false, false, PropertyChangeEventKind.UPDATE, "PROP2", null, PROP2, this));
     if (this.PROP1 == 10)
      cnt++;
   this.RESULT = cnt;
My observations are as follows.
- new push of value to PROP2 get reflected to excel A2 when button click event is over, not at the time of while loop process execution.
- Also I observed PROP1 value never changes and it is the value which is recorded just before button click event of component at run time and remain the same till button click event is over.
- Further to this I notice as click event is over, new value of PROP2 reflected in cell A2 and change value (if it passes IF formula of excel ) in A1 as well. Next button click action takes these new A1 and A2 values in consideration and process the function "test002".
I would like to understand possibility of custom component event execution process, which can able to pass as well as read value from component parameters to underlying excel with changes due to excel formula existance.  If it is not limitations (If so) what is the set of commands which can be helpful to achieve this. I appreciate if anybody explain typical event execution required in such scenarios with some actionscript code directions.
Thanks
Sandesh
Edited by: Sandesh Darne on Feb 8, 2010 11:48 AM
Edited by: Sandesh Darne on Feb 10, 2010 5:23 AM

Answer 1

Marton,
I have tried your solution. It works well immediately after xcelsius dashboard get displayed or preview. It does not wait click event to happen. So I modified further by adding one switch ( "switch001" in code piece shown below) to control iteration by click event. That stops running of iteration immediate after dashboard display.
In order to see iteration I have to click twice on button. First click does send "frm" parameter value to excel and excel formula operates. The excel formula result send back to component via SETTER of "frmResult" . But it stops over there. If I click second time the iteration starts for 100 times.
Also I try to export this to PDF. PDF file get generated. If I try to open PDF file it raise error.
My code is attached here.
"frm" is the parameter that sends random number to excel.
"frmResult" parameter receives excel formula output and send it back to component.
"test()" function operate on button click event and set switch001 and then calls "Calc" function for iterations.
MXML code..........
  <mx:VBox>
       <mx:TextInput id="frmResultLabel" width="100" />
       <mx:Button label="test..." click="test()"/>
  </mx:VBox>
Actionscript code
public var cnt:int;
          public var N:int = 0;
          public var sum:int = 0;
          public var switch001:Boolean = false;
         public function test():void {
               N = 0;
               sum = 0;
               switch001 = true;
          public function Calc():void {
          if (switch001 == true)
            if (N < 100)
                this.frm = Math.round(Math.random() * 1000);
            else if (N == 100)  // return the result
                 this.frmResult = sum;
                 // Label component use to display frm and frmResult values at runtime
                 frmResultLabel.text = sum.toString() + ">" + this.frm + ">" + this.frmResult;
             N++;
          [Bindable]
          private var _frm:int;
          private var _frmChanged:Boolean = true;
          [Bindable]
          public function get frm():int
               return _frm;
          public function set frm(value:int):void
               //if (value == null)  value = 0;
               if (_frm != value)
                    _frm = value;
                    _frmChanged = true;
                    invalidateProperties();
          override protected function commitProperties():void
             super.commitProperties();
             if (_frmResultChanged == true)
                    // start the cycle again by generating a new random number,
                    // or write out the result
                    Calc();