[flexcoders] Keeping DataGrid from scrolling to top on update to dataProvider
Hi Jordan,
I think i see what
you mean. I added some changes to the code posted below. now my scroll stays at
the previous position but throws an error when i try to scroll to the top and
also has lots of blank rows of data. is this some sort of bug?
public var listScrollPosition:Number =
0;
public function
rememberDGPosition(){listScrollPosition =
devicesListViewGrid.verticalScrollPosition;}
public function loaded(){
gateway.call(
"DBDeviceManager.getPage5", new Responder(onResult,
onFault),userid);}
public function
onResult(result:Array):void{ abcd =
result;
devicesListViewGrid.verticalScrollPosition = listScrollPosition
; intervalIdList =
setInterval(loaded, durationList);}
mx:DataGrid x="10" y="3" verticalGridLines="false" useRollOver="false"
id="devicesListViewGrid" dataProvider="{abcd}" width="704" height="392"
mouseDownEffect="none" selectionColor="#CDF3DD" rollOverColor="#013826"
alternatingItemColors="[#FF,#E1F5E8]" headerColors="[#006E4F,#006E4F]"
borderStyle="solid" horizontalGridLineColor="#BAE2CA"
verticalGridLineColor="#BAE2CA" horizontalGridLines="true"
borderColor="#BAE2CA" color="#FF" sortableColumns="false"
render="rememberDGPosition()"mx:columnsmx:DataGridColumn
width="50" id="datagridcolumn" headerText=" "
itemRenderer="CheckCellRenderer"/mx:DataGridColumn
headerText="NAME" dataField="name"
itemRenderer="CheckBoxRenderer"/mx:DataGridColumn
width="140" headerText="CURRENT STATUS" dataField="pmid"
itemRenderer="chartPivot"/mx:DataGridColumn
editable="false" width="90" headerText="DURATION" dataField="duration"
itemRenderer="DurationRenderer"/mx:DataGridColumn
editable="false" width="110" headerText="LAST CHANGE" dataField="lastchange"
itemRenderer="lasChangeRenderer"/mx:DataGridColumn
editable="false" width="100" headerText="PREVIOUS STATUS"
dataField="previousstatus"
itemRenderer="previousStateRenderer"/mx:DataGridColumn
editable="false" headerText="GROUP" dataField="group"
itemRenderer="groupRenderer"//mx:columns/mx:DataGrid
From: Chaitu
VadlapatlaSent: Sun 8/6/2006 10:46 PMTo:
[EMAIL PROTECTED]Cc: Wade ArnoldSubject: Keeping
DataGrid from scrolling to top on update to dataProvider
Hi Jordan,
I am very sorry to contact you off the list. But I
am kind of desperate for a solution to the same problem that you had before with
the datagrid not remembering the scroll position just before it was refreshed. I
followed some of your discussion and was able to even see that if the vertical
scroll position was set it had a set of rows which were blank. I saw your last
post where you were able to override it with a rememberDGPosition() on the DG's
renderer event. I am kind of lost at this point. could you please point
tome where i am supposed to insert the "rememberDGPosition()". Could you
please help me. I really appreciate it.
My code for the datagrid looks like this
public function loaded(){
gateway.call(
"DBDeviceManager.getPage5", new Responder(onResult,
onFault),userid);}
public function
onResult(result:Array):void{ abcd =
result; intervalIdList =
setInterval(loaded, durationList);}
mx:DataGrid x="10" y="3" verticalGridLines="false" useRollOver="false"
id="devicesListViewGrid" dataProvider="{abcd}" width="704" height="392"
mouseDownEffect="none" selectionColor="#CDF3DD" rollOverColor="#013826"
alternatingItemColors="[#FF,#E1F5E8]" headerColors="[#006E4F,#006E4F]"
borderStyle="solid" horizontalGridLineColor="#BAE2CA"
verticalGridLineColor="#BAE2CA" horizontalGridLines="true"
borderColor="#BAE2CA" color="#FF"
sortableColumns="false"mx:columnsmx:DataGridColumn
width="50" id="datagridcolumn" headerText=" "
itemRenderer="CheckCellRenderer"/mx:DataGridColumn
headerText="NAME" dataField="name"
itemRenderer="CheckBoxRenderer"/mx:DataGridColumn
width="140" headerText="CURRENT STATUS" dataField="pmid"
itemRenderer="chartPivot"/mx:DataGridColumn
editable="false" width="90" headerText="DURATION" dataField="duration"
itemRenderer="DurationRenderer"/mx:DataGridColumn
editable="false" width="110" headerText="LAST CHANGE" dataField="lastchange"
itemRenderer="lasChangeRenderer"/mx:DataGridColumn
editable="false" width="100" headerText="PREVIOUS STATUS"
dataField="previousstatus"
itemRenderer="previousStateRenderer"/mx:DataGridColumn
editable="false" headerText="GROUP" dataField="group"
itemRenderer="groupRenderer"//mx:columns/mx:DataGrid
---
K Everyone,I got it to work by calling the
"rememberDGPosition()" on the DG's render event. So that worked for the
scroll position and fixed the above bug. I can only assume that my earlier
solution was setting the scroll position before the dataProvider registered an
update.
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[flexcoders] Keeping DataGrid from scrolling to top on update to dataProvider
Hello All, I am working on an app in which I poll the server quite frequently to get new information. The information comes to me in an XML format that I simply assign as the dataProvider for a DataGrid component. I have to keep in consideration the fact that the user may have selected a certain row, and may want to delete that row even after an update to the dataProvider is made, so I keep track of the selectedIndex property and reselect upon an update. But if the user has not selected a row, the DataGrid will automatically scroll to the top upon an update, even if the user has scrolled to the bottom of the grid. Is there a way around this? I found a way to scrollToIndex(), but no way of getting the currently viewed items. It may have something to do with the various renderer properties available on the DataGrid, but I have a very limited understanding of this, so it's over my head. Surely this problem has been run into before, but I can't seem to find the right combination of search terms to figure out a method of solving it. Does anyone have any ideas or proven methods for the problem? Any help would be greatly appreciated. Thank you, Jordan Snyder [EMAIL PROTECTED] www.jordansnyder.com __._,_.___ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __,_._,___
RE: [flexcoders] Keeping DataGrid from scrolling to top on update to dataProvider
Hi Jordan You can keep track of the verticalScrollPosition property in your DataGrid and upon receving UPDATES, re-set the verticalScrollPosition to the previous value and the DataGrid will jump to the last scroll position and show the correct content. -deepa From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Jordan Snyder Sent: Monday, June 26, 2006 7:34 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Keeping DataGrid from scrolling to top on update to dataProvider Hello All, I am working on an app in which I poll the server quite frequently to get new information. The information comes to me in an XML format that I simply assign as the dataProvider for a DataGrid component. I have to keep in consideration the fact that the user may have selected a certain row, and may want to delete that row even after an update to the dataProvider is made, so I keep track of the selectedIndex property and reselect upon an update. But if the user has not selected a row, the DataGrid will automatically scroll to the top upon an update, even if the user has scrolled to the bottom of the grid. Is there a way around this? I found a way to scrollToIndex(), but no way of getting the currently viewed items. It may have something to do with the various renderer properties available on the DataGrid, but I have a very limited understanding of this, so it's over my head. Surely this problem has been run into before, but I can't seem to find the right combination of search terms to figure out a method of solving it. Does anyone have any ideas or proven methods for the problem? Any help would be greatly appreciated. Thank you, Jordan Snyder [EMAIL PROTECTED] www.jordansnyder.com __._,_.___ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS Visit your group "flexcoders" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __,_._,___
