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• How to implement a lazy loaded Silverlight data grid without using paging

  - by Marc Wittke

  Using the Business Application template from the brand new released RIA Services, you can see lots of examples using the data grid on top of a DomainDataSource in combination with a DataPager. The properties PageSize and LoadSize can be used to adjust the amount of data to be displayed in one page and the data that is prefetched in the background. Now I'd like to have a data grid with a scrollbar and no pager. The underlying DomainDataSource should load only the data that is diplayed in the grid. It should trigger another load, when the user scrolls down to items that are not yet in the data context. Is there any sample implementation how to do this?

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• How would you start automating my job? - Part 2

  - by Jurily

  (Followup to this question) After surviving the first wave of incoming shipments (9 hours of copy/paste), I now believe I have all the requirements. Here is the updated workflow: Monkey collects email attachments (4 Excel spreadsheets, 1 PDF) Monkey creates central database, does complex calculations (right now this is also an Excel spreadsheet) Monkey sends data to two bosses, who set the retail prices independently; first one to reply wins Monkey sends order form to our other warehouses, also Excel Monkey sends spreadsheets to VIP customers, carefully sanitized and formatted (4 different discount categories) Jurily enters the data into the accounting system. I've given up on automating this part, there's too much business logic involved, and the database is a pile of sh^W legacy My question: What technologies would you use for a quick and dirty solution? I'm mostly sold on C#, but coming from a Linux/C++ background, I'm horribly confused about my choices in Microsoft-land. For bonus points: How would you redesign the whole system from the ground up? P.S. in case you were wondering, my job title is System Administrator.

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• How to implement a syndication receiver? (multi-client / single server)

  - by LeonixSolutions

  I have to come up with a system architecture. A few hundred remote devices will be communicating over internet with a central server which will receive data and store it in a database. I could write my own TCP/IP based protocol use SOAP use AJAX use RSS anything else? This is currently seen as one way (telemetry, as opposed to SCADA). Would it make a difference if we make it bi-directional. There are no plans to do so, but Murphy's law makes me wary of a uni-directional solution (on the data plane; I imagine that the control plane is bi-directional in all solutions (?)). I hope that this is not too subjective. I would like a solution which is quick and easy to implement and for others to support and where the general "communications pipeline" from remote deceives to database server can be re-used as the core of future projects. I have a strong background in telecomms protocols, in C/C++ and PHP.

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• Positioning a tooltip relative to another div in JQuery

  - by James P

  Here's my tooltips markup and CSS: <div class="tooltip">Click here to like it</div> .tooltip { position: absolute; display: none; background: url('images/tooltip.gif') no-repeat; width: 100%; height: 40px; font-size: 0.8em; line-height: 40px; padding: 0px 0px 0px 8px; } Now, I have a div on my page called #button_container. I would like to place this .tooltip div 150px to the right of that div via JQuery. I understand I need to set this tooltips top and left attributes, but not sure how. Idealy the tooltips top attribute should be the same as #button_container (although #button_container isn't positioned absolutely) and 150 less than #button_container's left attribute. I don't really know where to get started on this so any help would be very much appreciated. Thanks.

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• jquery load function for small preview

  - by Hulk

  Preview:          In the following div i need to show a very small preview of a page.In order to do that what should be the css set to, When i use the following code below,the preview is very big.I need to show the preview with the size of the videos on you tube(as In suggestions tab) var url="/tools/display/" + param; $('#preview').css({"width" : "200px" , "height" : "10px" , "background-color" : "Black" , "position" : "fixed","display" : "inline" }); $("#preview").load(url); Thanks..

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• jquery dialog button

  - by Nishima

  Hi All, Can anyone tell em how can call a function with parameters on a dialog and call that same function from somwhere else also. function showEditDialog(TagDivId, id, type, bFlag) { try { stickyinfo = new Array(); jQuery('#'+TagDivId).dialog({ autoOpen: false, height : 535, width:320, modal: true, resizable:false, //closeOnEscape:false, buttons: { Cancel: function() { jQuery(this).dialog('close'); }, 'OK': function showEditDialogOkFunc(id) { //stickyinfo.clear(); //Register Collaboba Tag with the Server. var color = jQuery('#' + id).css('background-color'); var tagid = document.getElementById(id); if(tagid != null) { GetTagInformation(id, stickyinfo); } else { return false; } } } catch(e) { alert(e); } } Is it ok the way i m calling showEditDialogOkFunc(id) and can i call this function from anywhere else.Since it's a dialog function will it get all the properies of the dialog defined above the ok function.And if i call the OK function from anuwhere else will it get all the properties of the dialog o not. Thanks

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• Rails address and routes?

  - by Danny McClelland

  Hi Everyone, I have created a custom action within one of my controlers as follows: # GET /kases/discharge/1 # GET /kases/discharge/1.xml def discharge @kase = Kase.find_by_jobno(params[:id]) respond_to do |format| format.html { } # discharge.html.erb format.xml { render :xml => @kase } format.pdf { render :layout => false } prawnto :prawn => { :background => "#{RAILS_ROOT}/public/images/discharge.png", :left_margin => 0, :right_margin => 0, :top_margin => 0, :bottom_margin => 0, :page_size => 'A4' } end end For the edit actions etc the link would be link_to edit_kase_path(@kase) Is there a way of linking to the discharge action already, or do I have to make a custom route? Thanks, Danny

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• How to dynamically modify NHibernate load queries at runtime? EventListeners? Interceptors?

  - by snicker

  I need to modify the query used to load many-to-one references in my model. Specifically, I need to be able to further filter this data. Unfortunately, NH will not allow me to filter many-to-one relationships using the built in filtering system (?). I could just be doing something incorrect. Is there a hook where I can manually and dynamically modify the query used to load the data? Or an alternative to filters that will allow me to specify parameters? Background: I am working with a database that is using a form of revision control, with each entity having a natural ID PK, an EntityId, a RevisionValidTo and RevisionValidFrom field. There may be many rows using the same EntityId, which is the reference for other tables to join on, but the Revision ranges are mutually exclusive. Thus, the relationship is only many-to-one IIF the filter is applied. However, NH offers no way to specify a filter on many-to-one references (they do for collections...)

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• footer bar like facebook - css

  - by Jean

  Hello, I want to create a footer like facebook, that sticks at the bottom of the page, irrespective of the scroll. <div id="footer"></div> and here is the css style #footer{ position:absolute; left:0px; margin-bottom:0px; vertical-align:bottom; bottom:0px; width:100%; height:25px; background-color:#dfd5d7; overflow:hidden; } It comes fine, when I resize the browser window it does not stick to the bottom but a about 50 pixels up. Any solutions. Thanks Jean

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• bash: hwo to know NUM option in grep -A -B "on the fly" ?

  - by Michael Mao

  Hello everyone: I am trying to analyze my agent results from a collection of 20 txt files here. If you wonder about the background info, please go see my page, what I am doing here is just one step. Basically I would like to take only my agent's result out of the messy context, so I've got this command for a single file: cat run15.txt | grep -A 50 -E '^Agent Name: agent10479475' | grep -B 50 '^==' This means : after the regex match, continue forward by 50 lines, stop, then match a line separator starts with "==", go back by 50 lines, if possible (This would certainly clash the very first line). This approach depends on the fact that the hard-coded line number counter 50, would be just fine to get exactly one line separator. And this would not work if I do the following code: cat run*.txt | grep -A 50 -E '^Agent Name: agent10479475' | grep -B 50 '^==' The output would be a mess... My question is: how to make sure grep knows exactly when to stop going forward, and when to stop getting backward? Any suggestion or hint is much appreciated.

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• CSS: How to affect OTHER elements when a div is hovered

  - by Trufa

  I think this is a very basic question but I not sure how/if it can be done. What I want to do is to is a certain div is hovered, affect the properties of another div. For example, in this simple example when you hover over #cube it changes the background-color but what I that when I hover over #container, #cubeis affected. I don't want to explain further cause I think it might be confusing, but please ask the the question is no clear enough!! Thanks in advance!! jQueriers: abstain yourselves!! only CSS answers :)

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• Android how to make ImageView with a minWidth have a border?

  - by Kman

  I want to diplay an image so that it takes up a minmum width of the screen and should scale in its aspect ratio (the image width might be smaller or larger than the minimun width) I also want to have a fixed size border around this image. This is my xml section for it: <ImageView android:id="@+id/detailed_view_boxArt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:minWidth="150dp" android:layout_alignParentLeft="true" android:layout_below="@id/detailed_view_heading" android:padding="10dp" android:layout_marginLeft="5dp" android:scaleType="centerInside" android:background="#000"/> This however does not produce what I want...the problem is that it does not scale the image horizontally far enough (ie. the 10px padding that I have seems a lot more on the right and left) How would I produce the result that I want?

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• jQuery : how to manipulate indexes?

  - by Gabriel Theron

  Should not be such a hard question... I'm just having a hard time figuring out how to make operations on some jquery elements, particularly their indexes. Teh codez: $( "#docSlider" ).css("background-image", "url(../../bundles/mypath/images/maquette/img" + $( "#selectable li" ).index( this ) + (".jpg)")); I want to make the name of the picture I load depend on the index of a jQuery selectable. So I grab the index and try to add 1... but it can't work because "+" is also a concatenator. I've tried to parseInt as well, but it was always worth 0. How do I simply transform the index to an integer and then concatenate it with the rest of the string? Thank you in advance! Edit : I'm using a function that already exists, so I can hardly change the parameters (well, I guess I can't...)

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• What is your favourite JavaScript reference manual?

  - by daniel.sedlacek

  Hi, I come from strong typed unambiguous OOP background and I struggle to find JavaScript reference manual that would fit my needs. The ideal one should be: compendious and handy, I'm not looking for ECMA standart reference. type specific, even if JS is not strong typed function arguments and returns have a type. browser specific, no matter the standards every browser is different and this ambiguity is killing me. examples, they are always handy. off line, this would be fine but it's not a condition. What is your favourite one? Help me, Obi-Wan Kenobi; you're my only hope!

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• How to add a "handle bar" to a sliding div

  - by Josh Brown

  I have a small splash page and have a browser-wide div that acts as a wrapper and have a div inside of #wrapper that is attached to a $.click(); event to slide the wrapper div out to view the browser-size background photo. I'm wanting to implement a small button/link that will slide in on the bottom right corner after the wrapper div is hidden. I know it is probably mainly CSS, but am needing some help. Thanks in advance for your help! PS: Using jQuery as my framework.

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• Displaying a collection of controls in a specific way in WPF

  - by Alvaro

  I have a collection of controls "MyCollection" wich changes in the Runtime. And I have to follow some constraints for that, for example: If my parameter "MyCollection.Count = 4" the property "NumberOfcolumns" will have the value 2, in order to create new Lines, and show the controls Two per Two. This is how I'm displaying my collection : <ItemsControl ItemsSource="{Binding MyCollection}" BorderThickness="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" > <ItemsControl.ItemsPanel> <ItemsPanelTemplate > <UniformGrid Columns="{Binding NumberOfColumns}" VerticalAlignment="Center" HorizontalAlignment="Center" Background="Transparent"/> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> The problem is that my controls have different sizes, and as In UniformGrids, Cells are uniform... My design is not really pretty, because I have little controls shown in big Cells !! Can someone help me to solve this problem ? NB: Please give me a detailled solution if possible, not something like : "Use WrapPanel..."

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• JavaScript on Android randomly stops working

  - by AndersWid

  Hi! I have an application that uses a WebView and a html-page with javascript functions. Randomly the JavaScript functions doesn't seem to be called. It works up to a random point (I have looked at this bug all day) can only be produced on hardware (HTC Legend) not on emulator. Basicly I'm using callback to javaScript whenever the user presses a button, these callbacks tell the html to redraw using javaScript functions. mHandler.post(new Runnable() { public void run() { mWebView.loadUrl("javascript:getDataLine()"); } }); The first line in this javaScript code is an alert that says that it has started, so that I can see that it's working. Settings alerts or console.log's everywhere won't help as it seems the problem is in the webview or in Android itself. I need a way to see what's going on in the background. Maybe see if a previous call failed and stalled the thread or something.

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• Will VC++ MFC become obsolete in near future?

  - by AKN

  Normally people say MFC is little clumsy. It makes UI development slightly difficult to maintain since it has lot of auto generated code. It has good architecture (doc/view) but is not transparent like Win32 programming to understand how window program works in the background. So with this situation, is it good to extend the exposure on MFC programming or better to switch to .NET since for faster UI design with ease in maintenance. Is it good to continue as MFC developer or good to know .NET as well? How globally companies are looking into MFC as a technology for UI developments. Are they comfortable in supporting their developers to continue with MFC or looking for changing their development technology.

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• Checkbox show error.

  - by Kyle Sevenoaks

  Hi, I need to make this show an error if the user tries to leave the page without checking this tickbox. It has no other use other than visual, is there a way to implement such a thing? <span> <input value="1" type="checkbox" name="salgsvilkar" ID="checkbox2" style="float:left;" onclick="document.getElementById('scrollwrap').style.cssText=' border-color:#85c222; background-color:#E5F7C7;';" /> <label for="checkbox2" class="akslabel"> Salgs og leveringsvilkår er lest og akseptert </label> </span> CSS is just for styling. Thanks.

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• Intercept windows open file

  - by HyLian

  Hello, I'm trying to make a small program that could intercept the open process of a file. The purpose is when an user double-click on a file in a given folder, windows would inform to the software, then it process that petition and return windows the data of the file. Maybe there would be another solution like monitoring Open messages and force Windows to wait while the program prepare the contents of the file. One application of this concept, could be to manage desencryption of a file in a transparent way to the user. In this context, the encrypted file would be on the disk and when the user open it ( with double-click on it or with some application such as notepad ), the background process would intercept that open event, desencrypt the file and give the contents of that file to the asking application. It's a little bit strange concept, it could be like "Man In The Middle" network concept, but with files instead of network packets. Thanks for reading.

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• MySQL triggers cannot update rows in same table the trigger is assigned to. Suggested workaround?

  - by Cory House

  MySQL doesn't currently support updating rows in the same table the trigger is assigned to since the call could become recursive. Does anyone have suggestions on a good workaround/alternative? Right now my plan is to call a stored procedure that performs the logic I really wanted in a trigger, but I'd love to hear how others have gotten around this limitation. Edit: A little more background as requested. I have a table that stores product attribute assignments. When a new parent product record is inserted, I'd like the trigger to perform a corresponding insert in the same table for each child record. This denormalization is necessary for performance. MySQL doesn't support this and throws: Can't update table 'mytable' in stored function/trigger because it is already used by statement which invoked this stored function/trigger. A long discussion on the issue on the MySQL forums basically lead to: Use a stored proc, which is what I went with for now. Thanks in advance!

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• Help with Python structure in *nixes.

  - by user198553

  I came from a Windows background whern it comes to development environments. I'm used to run .exe's from everything I need to run and just forget. I usually code in php, javascript, css, html and python. Now, I have to use Linux at my work, in a non changeable Ubuntu 8.04, with permissions to upgrade my system using company's repositories only. I need to install Python 2.4.3 to start coding in an old legacy system. I had Python 2.5. I downloaded Python 2.4.3 tarballs, ran ./configure make and such. Everything worked out, but now the "default" installation is my system is Python2.4 instead of of Python2.5. I want help from you to change it back, and if possible, some material to read about symlinks, multiple Python installations, virtualenvs and such: everything I need to know before installing/upgrading Python modules. I installed for example the ElementTree package and don't even know in which Python installation it was installed. Thanks in advance!

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• Batch backup a harddrive without modifying access times C#

  - by johnathan-doena

  I'm trying to write a simple program that will backup my flash drive. I want it to work automatically and silently in the background, and I also want it to be as quick as possible. The thing is, resetting all the access times is useless to me, and something I want to avoid. I know I can read the access times and set them back, but I bet it will fail one day in the future. It would be much simpler to read the files without ever changing it. Also, what is the fastest way to do this? What differences would there be between, say, a flash drive and an external hard drive. I am writing this in C#, as it is the simplest way to do it and it will probably last more generations of Windows..

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• How to draw a transparent stroke (or anyway clear part of an image) on the iPhone

  - by devguy

  I have a small app that allows the user to draw on the screen with the finger. Yes, nothing original, but it's part of something larger :) I have a UIImageView where the user draws, by creating a CGContextRef and the various CG draw functions. I primarily draw strokes/lines with the function CGContextAddLineToPoint Now the problem is this: the user can draw lines of various colors. I want to give him the ability to use a "rubber" tool to delete some part of the image drawn so far, with the finger. I initially did this by using a white color for the stroke (set with the CGContextSetRGBStrokeColor function) but it did't work out...because I discovered later that the UIImage on the UIImageView was actually with transparent background, not white...so I would end up with a transparent image with white lines on it! Is there anyway to set a "transparent" stroke color...or is there any other way to clear the content of the CGContextRef under the user's finger, when he moves it? Thanks

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• Changing Image In a Button After Being Clicked?

  - by BuZzZzJaY

  Creating a game in Android using multiple Buttons to display an image from the drawable folder. I want to change the button to a different image after the button has been clicked on. Here is the button code: <Button android:id="@+id/b36" android:background="@drawable/black" android:layout_width="45px" android:layout_height="45px" /> I can't find anything about how to change the actual image of the button. You can change the color of the button by using the following code in the java file: b36.setBackgroundColor(0xAA00AA00);

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