[flexcoders] Re: Dynamic Min/Max for chart axis not updating automatically.
Can this be done?
--- In flexcoders@yahoogroups.com, polonycjunk [EMAIL PROTECTED] wrote:
Hi Ely,
Sorry if I confused you. If I let flex handle the min/max value, I am
not getting the time axis I'm looking. Say for example, the current
time is 4:01:00. Consider a collection with size = 60. It consists
of data for the last 60 seconds. If I let flex handle it, the h-axis
will only show 4:00:00 to 4:01:00. But what I really want is for the
h-axis to show the time from 4:00:00(min) to 4:03:00 (max)
(T+3minutes). As more data arrives each second, I want the min and
max to change to reflect the times that are in the collection.
Once I assign a min/max to the chart, is there a way to update it
according to new values in the dataProvider?
The only way I was able to make it change was if I created a button
which sets a new Min/Max. I would need to consistently click on the
button to create the moving window of (T + 3).
--- In flexcoders@yahoogroups.com, Ely Greenfield egreenfi@ wrote:
I'm a little confused by your question. If you're explicitly
assigning a
min/max value, you're telling the chart you don't want it to generate
automatic min/max values. If you're asking how to remove your
previously assigned min/max and ask it to restart automatically
generating min/max values, just set the min/max of the axis to
undefined.
Ely.
From: flexcoders@yahoogroups.com
[mailto:[EMAIL PROTECTED] On
Behalf Of polonycjunk
Sent: Wednesday, December 06, 2006 9:42 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Dynamic Min/Max for chart axis not updating
automatically.
Once a minimum/maximum value is assigned to the DateTimeAxis, how can
i get a realtime chart to update the min/max values depending on its
dataProvider and keep it updating?
Here is some code to illustrate:
Note: dataProvider is an ArrayCollection of size 100. if size = 100,
the date at index 0 is removed and the next date is added.
private var _minimum:Date=null;
[Bindable]
public function get minimum():Date{
if(this.dataProvider == null){
_minimum = new Date();
_minimum.setHours(9,0,0,0);
}else{
_minimum = this.dataProvider.getItemAt(0).date;
}
return _minimum;
}
private var _maximum:Date=null;
[Bindable]
public function get maximum():Date{
if(this.dataProvider == null){
_maximum = new Date();
_maximum.setHours(16,0,0,0);
}else{
if(_zoomLevel == seconds){
_maximum.setHours(_minimum.hours, _minimum.minutes +3,
_minimum.seconds,_minimum.milliseconds); //I want my maximum to
change whenever my minimum changes.
}
}
return _maximum;
}
MXML code:
mx:horizontalAxis
mx:DateTimeAxis id=hTimeAxis labelUnits=minutes
dataUnits=minutes interval=20 displayLocalTime=true
alignLabelsToUnits=true minimum={minimum} maximum={maximum} /
/mx:horizontalAxis
RE: [flexcoders] Re: Dynamic Min/Max for chart axis not updating automatically.
Are you asking how to detect changes in your dataprovider? The answer
is yes, sort of. But it really depends on your app and where the data
is coming from. IN general, I would say that this is application
dependent. A very simple code example would help us know how to guide
you.
Ely.
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of polonycjunk
Sent: Thursday, December 07, 2006 7:12 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Dynamic Min/Max for chart axis not updating
automatically.
Can this be done?
--- In flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com
, polonycjunk [EMAIL PROTECTED] wrote:
Hi Ely,
Sorry if I confused you. If I let flex handle the min/max value, I am
not getting the time axis I'm looking. Say for example, the current
time is 4:01:00. Consider a collection with size = 60. It consists
of data for the last 60 seconds. If I let flex handle it, the h-axis
will only show 4:00:00 to 4:01:00. But what I really want is for the
h-axis to show the time from 4:00:00(min) to 4:03:00 (max)
(T+3minutes). As more data arrives each second, I want the min and
max to change to reflect the times that are in the collection.
Once I assign a min/max to the chart, is there a way to update it
according to new values in the dataProvider?
The only way I was able to make it change was if I created a button
which sets a new Min/Max. I would need to consistently click on the
button to create the moving window of (T + 3).
--- In flexcoders@yahoogroups.com
mailto:flexcoders%40yahoogroups.com , Ely Greenfield egreenfi@
wrote:
I'm a little confused by your question. If you're explicitly
assigning a
min/max value, you're telling the chart you don't want it to
generate
automatic min/max values. If you're asking how to remove your
previously assigned min/max and ask it to restart automatically
generating min/max values, just set the min/max of the axis to
undefined.
Ely.
From: flexcoders@yahoogroups.com
mailto:flexcoders%40yahoogroups.com
[mailto:flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com
] On
Behalf Of polonycjunk
Sent: Wednesday, December 06, 2006 9:42 AM
To: flexcoders@yahoogroups.com mailto:flexcoders%40yahoogroups.com
Subject: [flexcoders] Dynamic Min/Max for chart axis not updating
automatically.
Once a minimum/maximum value is assigned to the DateTimeAxis, how
can
i get a realtime chart to update the min/max values depending on its
dataProvider and keep it updating?
Here is some code to illustrate:
Note: dataProvider is an ArrayCollection of size 100. if size = 100,
the date at index 0 is removed and the next date is added.
private var _minimum:Date=null;
[Bindable]
public function get minimum():Date{
if(this.dataProvider == null){
_minimum = new Date();
_minimum.setHours(9,0,0,0);
}else{
_minimum = this.dataProvider.getItemAt(0).date;
}
return _minimum;
}
private var _maximum:Date=null;
[Bindable]
public function get maximum():Date{
if(this.dataProvider == null){
_maximum = new Date();
_maximum.setHours(16,0,0,0);
}else{
if(_zoomLevel == seconds){
_maximum.setHours(_minimum.hours, _minimum.minutes +3,
_minimum.seconds,_minimum.milliseconds); //I want my maximum to
change whenever my minimum changes.
}
}
return _maximum;
}
MXML code:
mx:horizontalAxis
mx:DateTimeAxis id=hTimeAxis labelUnits=minutes
dataUnits=minutes interval=20 displayLocalTime=true
alignLabelsToUnits=true minimum={minimum} maximum={maximum} /
/mx:horizontalAxis
[flexcoders] Re: Dynamic Min/Max for chart axis not updating automatically.
Hi Ely,
Sorry if I confused you. If I let flex handle the min/max value, I am
not getting the time axis I'm looking. Say for example, the current
time is 4:01:00. Consider a collection with size = 60. It consists
of data for the last 60 seconds. If I let flex handle it, the h-axis
will only show 4:00:00 to 4:01:00. But what I really want is for the
h-axis to show the time from 4:00:00(min) to 4:03:00 (max)
(T+3minutes). As more data arrives each second, I want the min and
max to change to reflect the times that are in the collection.
Once I assign a min/max to the chart, is there a way to update it
according to new values in the dataProvider?
The only way I was able to make it change was if I created a button
which sets a new Min/Max. I would need to consistently click on the
button to create the moving window of (T + 3).
--- In flexcoders@yahoogroups.com, Ely Greenfield [EMAIL PROTECTED] wrote:
I'm a little confused by your question. If you're explicitly assigning a
min/max value, you're telling the chart you don't want it to generate
automatic min/max values. If you're asking how to remove your
previously assigned min/max and ask it to restart automatically
generating min/max values, just set the min/max of the axis to
undefined.
Ely.
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of polonycjunk
Sent: Wednesday, December 06, 2006 9:42 AM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Dynamic Min/Max for chart axis not updating
automatically.
Once a minimum/maximum value is assigned to the DateTimeAxis, how can
i get a realtime chart to update the min/max values depending on its
dataProvider and keep it updating?
Here is some code to illustrate:
Note: dataProvider is an ArrayCollection of size 100. if size = 100,
the date at index 0 is removed and the next date is added.
private var _minimum:Date=null;
[Bindable]
public function get minimum():Date{
if(this.dataProvider == null){
_minimum = new Date();
_minimum.setHours(9,0,0,0);
}else{
_minimum = this.dataProvider.getItemAt(0).date;
}
return _minimum;
}
private var _maximum:Date=null;
[Bindable]
public function get maximum():Date{
if(this.dataProvider == null){
_maximum = new Date();
_maximum.setHours(16,0,0,0);
}else{
if(_zoomLevel == seconds){
_maximum.setHours(_minimum.hours, _minimum.minutes +3,
_minimum.seconds,_minimum.milliseconds); //I want my maximum to
change whenever my minimum changes.
}
}
return _maximum;
}
MXML code:
mx:horizontalAxis
mx:DateTimeAxis id=hTimeAxis labelUnits=minutes
dataUnits=minutes interval=20 displayLocalTime=true
alignLabelsToUnits=true minimum={minimum} maximum={maximum} /
/mx:horizontalAxis
