Mailing-List: contact user-help@beehive.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Beehive Users" <user@beehive.apache.org>
Received-SPF: pass (asf.osuosl.org: local policy)
From: srinivas-s@comcast.net
To: "Beehive Users" <user@beehive.apache.org>
Subject: Re: composite components using tag files
Date: Wed, 12 Apr 2006 13:32:50 +0000
Message-Id: 
 <041220061332.2603.443D018200082E0E00000A2B22058863609CD39C0E900702079D9C@comcast.net>
MIME-Version: 1.0
Content-Type: multipart/alternative;
 boundary="NextPart_Webmail_9m3u9jl4l_2603_1144848770_0"

--NextPart_Webmail_9m3u9jl4l_2603_1144848770_0
Content-Type: text/plain
Content-Transfer-Encoding: 8bit

Eddie,

This is required for our project

I would really appreciate if you can help regrading any changes that are required

Thank You
Srinivas Surapaneni

-------------- Original message -------------- 
From: "Eddie O'Neil" <ekoneil@gmail.com> 

> Srinivas-- 
> 
> No, I don't have a sample that shows lazy data loading. It should 
> be possible to use the data grid with lazy data loading (small windows 
> into larger data sets) by getting the data and then building a custom 
> pager that displays what the application knows is the "right" location 
> in the data set. You can do this in JSP 2.0 EL with the arithmetic 
> operators. 
> 
> Like I said -- I've not tried this, so I might need to make a couple 
> of changes to support you here (or submit patches!), so let me know if 
> that's needed. 
> 
> Thanks! 
> 
> Eddie 
> 
> 
> On 4/11/06, Srinivas Surapaneni wrote: 
> > Are there any samples to use DataGrid for lazy loading the data 
> > 
> > If we have 1000 records, I will set the dataset size to 1000. But in memory, 
> > it has only records for that page 
> > 
> > When the user clicks on the next or previous links on the pager, we will 
> > load the next page items from the database 
> > 
> > Can this be easily supported by DataGrid? 
> > 
> > -----Original Message----- 
> > From: Eddie O'Neil [mailto:ekoneil@gmail.com] 
> > Sent: Tuesday, April 11, 2006 10:45 PM 
> > To: Beehive Users 
> > Subject: Re: composite components using tag files 
> > 
> > On 4/11/06, Srinivas Surapaneni wrote: 
> > > We can customize the Sort by using for 
> > the 
> > > sort links and if we embed the whole dataGrid in a form. Are you talking 
> > > abot the same thing? 
> > 
> > [eko] Interesting idea -- that might work, but I've never tried it. 
> > Let me know. :) 
> > 
> > > 
> > > But the pager links are generated from PagerModel. we have to re implement 
> > > the PagerModel that generates the links that use javascript to submit the 
> > > form. Does beehive framework support any utility methods to build url's 
> > that 
> > > simulate the ? 
> > 
> > [eko] I'd suggest just writing your own pager UI using JSP 2.0 EL and 
> > the Pager Model. Then, you're in complete control of what it looks 
> > like and how it functions and can write JavaScript to add parameters 
> > to the for POSTing. In this case, three's at least a 
> > test of this (no sample yet, sorry) here: 
> > 
> > http://svn.apache.org/repos/asf/beehive/trunk/netui/test/webapps/drt/web/WEB 
> > -INF/tags/org/apache/beehive/netui/test/databinding/tagfiles/jumpToPage.tag 
> > 
> > This is a pager inside of a JSP 2.0 .tag file that supports 
> > jump-to-page functionality that uses an HTML 
and renders a 
> > drop-down box for moving between pages in a data set. Maybe that 
> > helps... 
> > 
> > > 
> > > 
> > > 
> > > 
> > > -----Original Message----- 
> > > From: Eddie O'Neil [mailto:ekoneil@gmail.com] 
> > > Sent: Tuesday, April 11, 2006 10:26 PM 
> > > To: Beehive Users 
> > > Subject: Re: composite components using tag files 
> > > 
> > > This sounds like a classic problem in the web -- user edits data in 
> > > a text box and clicks on another link that isn't wired up to POST the 
> > > form. :) 
> > > 
> > > If you're using the auto-generated sort links in the data grid's 
> > > tags, you should be able to write JavaScript 
> > > in the header cell's "onClick" JavaScript event handler that gathers 
> > > the data from the form, converts the GET to a POST, and submits it to 
> > > the server. But, I've not tried this. :) 
> > > 
> > > JSF would likely support this case because it converts everything 
> > > into POSTs, as I recall. The NetUI data grid does things differently 
> > > so that pages can be bookmarked because the state is captured in URLs. 
> > > 
> > > > I will try the datagrid again with the tags and see how the 
> > > > url's are generated for paging and sorting 
> > > 
> > > Maybe I mistyped -- this won't work by default as a 
> > > wrapping a data grid only allows HTML  elements to POST from 
> > > cells in the grid. But, if you write JavaScript to wire parameters to 
> > > the form from the sort / filter / page URLs, you should also be able 
> > > to attach that state to the form and POST. I'm interested in that -- 
> > > let me know how it works out. 
> > > 
> > > Thanks! 
> > > 
> > > Eddie 
> > > 
> > > 
> > > On 4/11/06, Srinivas Surapaneni wrote: 
> > > > For the paging and sorting URL's , if you look at the view source from 
> > the 
> > > > browser, they are using GET and not POST 
> > > > 
> > > > That is fine if it is read only data 
> > > > 
> > > > But if we have a editable grid, when the user changes some data in the 
> > > text 
> > > > box and click on the paging or sorting, the user would like to see the 
> > > > changes 
> > > > 
> > > > This is only possible if we post the form and display it again 
> > > > 
> > > > Thank You 
> > > > Srinivas Surapaneni 
> > > > 
> > > > -----Original Message----- 
> > > > From: Eddie O'Neil [mailto:ekoneil@gmail.com] 
> > > > Sent: Tuesday, April 11, 2006 10:11 PM 
> > > > To: Beehive Users 
> > > > Subject: Re: composite components using tag files 
> > > > 
> > > > Comments in line... 
> > > > 
> > > > On 4/11/06, Srinivas Surapaneni wrote: 
> > > > > If I am using a editable grid, I want to use < netui:textbox 
> > > > > dataSource="container.item.xxxxxx - where xxxxx I want to use from 
> > the 
> > > > list 
> > > > > of columns that got passed into the tag as attribute 
> > > > 
> > > > [eko] Apologies -- I think I misunderstood before. When you say "the 
> > > > list of columns", you mean the data in the data set being rendered in 
> > > > the data grid. :) Yes, this should be possible -- just wrap the data 
> > > > grid itself or a specific row in a tag. I looked, and we 
> > > > don't seem to have a sample of this, which is unfortunate. I've added 
> > > > a JIRA issue: 
> > > > 
> > > > http://issues.apache.org/jira/browse/BEEHIVE-1098 
> > > > 
> > > > to track adding one. 
> > > > 
> > > > > 
> > > > > One more question on the datagrid 
> > > > > 
> > > > > All the datagrid urls are plain url's , not form posts 
> > > > > When we want to use the dataGrid for editable grids, we need to post 
> > it. 
> > > > > Basically, for all the sorting and paging we have to post the form. Is 
> > > > there 
> > > > > any plan to provide this feature? 
> > > > 
> > > > [eko] Not sure I understand this -- could you describe your use case 
> > > > in a little more detail? Today, the data grid does paging and sorting 
> > > > as HTTP GETs so that the links are bookmarkable and don't require form 
> > > > POSTs. Currently, I don't have any plans to change this behavior. 
> > > > For editable data grids, you should be able to POST a form for a 
> > > > specific row or for the entire data grid, but that's separate from the 
> > > > links for sorting, filtering, and paging, which is state that can be 
> > > > stored on the server and "re-attached" when an edit is finished. 
> > > > 
> > > > Again, I'll try to put together an example of this, but it's going to 
> > > > take me a couple of weeks to complete because of some other 
> > > > committments in the interim. 
> > > > 
> > > > > 
> > > > > 
> > > > > Thank You 
> > > > > 
> > > > > 
> > > > > -----Original Message----- 
> > > > > From: Eddie O'Neil [mailto:ekoneil@gmail.com] 
> > > > > Sent: Tuesday, April 11, 2006 9:36 PM 
> > > > > To: Beehive Users 
> > > > > Subject: Re: composite components using tag files 
> > > > > 
> > > > > Comments in line... 
> > > > > 
> > > > > 
> > > > > On 4/11/06, Srinivas Surapaneni wrote: 
> > > > > > I am trying to build composite components from netui tags 
> > > > > > 
> > > > > 
> > > > > [eko] It should be possible to build composite components from the 
> > > > > NetUI tags. The only limitation that I'm aware of is that some NetUI 
> > > > > JSP tags can't be split across a JSP and a .tag file because they use 
> > > > > the method "findAncestorWithClass" which requires some JSP tags to be 
> > > > > in a single JSP tag hierarchy. 
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > Ex: There is no dual list component, calendar component in beehive 
> > > > > 
> > > > > [eko] True -- feel free to contribute one! :) 
> > > > > 
> > > > > > 
> > > > > > I am trying to use the new JSP tag file mechanism to create a tag 
> > file 
> > > > > which 
> > > > > > contains all the components required for the dual list 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > But I need to pass the select options for List 1 , List 2 and 2 
> > > > > datasources 
> > > > > > to the tag as attributes 
> > > > > > 
> > > > > > 
> > > > > 
> > > > > [eko] The NetUI "dataSource" attribute is a little special as it's 
> > > > > used to round-trip data into a page, to the browser, and back to the 
> > > > > server on a POST. Usually, you'd only reference the "actionForm" 
> > > > > implicit object from a "dataSource". For repeating tags like the data 
> > > > > grid, you might reference many other things. The "netui-samples" web 
> > > > > application provides some good examples of this, and documentation on 
> > > > > the nuances of the "dataSource" attribute are described here: 
> > > > > 
> > > > > http://beehive.apache.org/docs/1.0.1/netui/databinding.html 
> > > > > 
> > > > > To pass the options to a select box, you'd use the "optionsDataSource" 
> > > > > tag for the choices and use "dataSource" as the place data is stored 
> > > > > when a JSP POSTs. The netui-samples/ webapp in the distribution has 
> > > > > examples of this. 
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > But the datasource does not take runtime expressions. Is there any 
> > way 
> > > > to 
> > > > > > use runtime expressions for netui components like textBox, select, 
> > > > > checkbox 
> > > > > > etc 
> > > > > > 
> > > > > 
> > > > > [eko] On the dataSource attribute, this is (unfortunately) not 
> > > > > possible because of limitations in the JSP 2.0 Expression Language, 
> > > > > though the rest of the attributes should be runtime expressionable. 
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > Other thing we are tryinh to create is reusable datagrid 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > We want to create a list of column names in the pageflow scope and 
> > in 
> > > > the 
> > > > > > reusable datagrid 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > we want to use container.item.xxxxxxxx - where xxxxx comes from the 
> > > > > column 
> > > > > > list. 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > Is there any easy way to do this? 
> > > > > > 
> > > > > > 
> > > > > 
> > > > > [eko] I don't know why this shouldn't work, but you'll need to use the 
> > > > > appropriate JSTL tag to render all of the s 
> > > > > from inside of the tag. But, I've not tried it -- 
> > > > > if you run into trouble with it, let me know. 
> > > > > 
> > > > > > 
> > > > > > -- 
> > > > > > No virus found in this outgoing message. 
> > > > > > Checked by AVG Free Edition. 
> > > > > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 
> > > 4/8/2006 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > 
> > > > > -- 
> > > > > No virus found in this incoming message. 
> > > > > Checked by AVG Free Edition. 
> > > > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 
> > 4/8/2006 
> > > > > 
> > > > > 
> > > > > -- 
> > > > > No virus found in this outgoing message. 
> > > > > Checked by AVG Free Edition. 
> > > > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 
> > 4/8/2006 
> > > > > 
> > > > > 
> > > > > 
> > > > 
> > > > -- 
> > > > No virus found in this incoming message. 
> > > > Checked by AVG Free Edition. 
> > > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > > > 
> > > > 
> > > > -- 
> > > > No virus found in this outgoing message. 
> > > > Checked by AVG Free Edition. 
> > > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > > > 
> > > > 
> > > > 
> > > 
> > > -- 
> > > No virus found in this incoming message. 
> > > Checked by AVG Free Edition. 
> > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > > 
> > > 
> > > -- 
> > > No virus found in this outgoing message. 
> > > Checked by AVG Free Edition. 
> > > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > > 
> > > 
> > > 
> > 
> > -- 
> > No virus found in this incoming message. 
> > Checked by AVG Free Edition. 
> > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > 
> > 
> > -- 
> > No virus found in this outgoing message. 
> > Checked by AVG Free Edition. 
> > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 
> > 
> > 
> > 
--NextPart_Webmail_9m3u9jl4l_2603_1144848770_0--