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• qt/wxwidgets third party components?

  - by tkd

  I'm used to working in a Delphi and C# environment which seem to have a rich set of third party components available. I'm currently wanting to do cross-platform programming in C++ using either qt or wxwidgets. Is there a large market for third party components? I was looking at sourceforge and that doesn't seem to show much that is useful (how the hell do you find out what components or features are in a project without downloading the source?). I'm thinking carousel/coverflow components, rich datagrids (like the sort DevExpress provide). Or is this, write your own territory?

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• Displaying local images in the web browser control

  - by RichardK9

  Hi, I am writing a Windows Forms application and am creating a report for users to view in the webBrowser control. The problem is that it does not seem to display an image which is situated on my local hard drive, it just display the "broken image" red cross symbol. The path of the image is correct and when I view the source code of the generated html in either Firefox or Chrome it works but not in Internet Explorer (which I presume it what is used for this webBrowser control). Any help would be much appreciated. Thanks, Richard.

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• Having trouble using 'AND' in CONTAINSTABLE SQL SERVER FULL TEXT SEARCH

  - by Joshua

  I've been using FULL-TEXT for awhile but I cannot seem to get the most relevant results sometimes. If I have an field with something like "An Overview of Pain Medicine 5/12/2006" and a user types "An Overview 5/12/2006" So we create a search like: '"An" AND "Overview" AND "5/12/2006"' - 0 results (bad) '"Overview" AND "5/12/2006"' - 1 result (good) The CONTAINSTABLE portion of my query: FROM ce_Activity A INNER JOIN CONTAINSTABLE(View_Activities,(Searchable), @Search) AS KeyTbl ON A.ActivityID = KeyTbl.[KEY] "Searchable" is a field contains the activity title, and start date(converted to string) in one field so it's all search friendly. Why would this happen?

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• How to avoid the same calculations on column values over and over again in a select?

  - by Peter

  I sometimes write SELECTs on the form: SELECT a.col1+b.col2*c.col4 as calc_col1, a.col1+b.col2*c.col4 + xxx as calc_col1_PLUS_MORE FROM .... INNER JOIN ... ON a.col1+b.col2*c.col4 < d.some_threshold WHERE a.col1+b.col2*c.col4 > 0 When the calculations get rather involved and used up to 3-5 times within the same SELECT, I would really like to refactor that out in a function or similar in order to 1) hopefully improve performance / make use of cache 2) avoid forgetting to update one of the 4 calculations when I at a later stage realize I need to change the calculation. I usually have these selects within SPs. Any ideas?

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• How do I set up mod rewrite to do this?

  - by Ali

  Hi guys heres the scene - I'm building a web application which basically creates accounts for all users. Currently its setup like this the file structure: root/index.php root/someotherfile.php root/images/image-sub-folder/image.jpg root/js/somejs.js When users create an account they choose a fixed group name and then users can join that group. Initially I thought of having an extra textbox in the login screen to enter the group the user belongs to login to. BUt I would like instead to have something like virtual folders in this case: root/group-name/index.php I heard it can be done with apache mod rewrite but I'm not sure how to do this - any help here? Basically instead of having something like &group-name=yourGroupName appended to every page I would just like something of the nature above.

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• rails: include statement with two ON conditions

  - by Markus

  Hi, I have tree tables books bookmarks users where there is a n to m relation from books to users trough bookmarks. Im looking for a query, where I get all the books of a certain user including the bookmarks. If no bookmarks are there, there should be a null included... my sql statement looks like: SELECT * FROM `books` LEFT OUTER JOIN `bookmarks ` ON bookmarks.book_id = books.id AND bookmarks.user_id = ? In rails I only know the :include statement, but how can I add the second bookmarks.user_id = ? statement in the ON section of this query? if I put it in the :conditions part, no null results would get returned! Thanks! Markus

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• Code golf: the Mandelbrot set

  - by Stefano Borini

  Usual rules for the code golf. Here is an implementation in python as an example from PIL import Image im = Image.new("RGB", (300,300)) for i in xrange(300): print "i = ",i for j in xrange(300): x0 = float( 4.0*float(i-150)/300.0 -1.0) y0 = float( 4.0*float(j-150)/300.0 +0.0) x=0.0 y=0.0 iteration = 0 max_iteration = 1000 while (x*x + y*y <= 4.0 and iteration < max_iteration): xtemp = x*x - y*y + x0 y = 2.0*x*y+y0 x = xtemp iteration += 1 if iteration == max_iteration: value = 255 else: value = iteration*10 % 255 print value im.putpixel( (i,j), (value, value, value)) im.save("image.png", "PNG") The result should look like this Use of an image library is allowed. Alternatively, you can use ASCII art. This code does the same for i in xrange(40): line = [] for j in xrange(80): x0 = float( 4.0*float(i-20)/40.0 -1.0) y0 = float( 4.0*float(j-40)/80.0 +0.0) x=0.0 y=0.0 iteration = 0 max_iteration = 1000 while (x*x + y*y <= 4.0 and iteration < max_iteration): xtemp = x*x - y*y + x0 y = 2.0*x*y+y0 x = xtemp iteration += 1 if iteration == max_iteration: line.append(" ") else: line.append("*") print "".join(line) The result ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** **************************************** *************************************** *************************************** ************************************** ************************************* ************************************ ************************************ *********************************** *********************************** ********************************** ************************************ *********************************** ************************************* ************************************ *********************************** ********************************** ******************************** ******************************* **************************** *************************** ***************************** **************************** **************************** *************************** ************************ * * *********************** *********************** * * ********************** ******************** ******* ******* ******************* **************************** *************************** ****************************** ***************************** ***************************** * * * **************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ******************************************************************************** ********************************************************************************

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• Downloading a Directory Tree with FTPLIB

  - by Anthony Lemmer

  I'd like to download a directory and all of its contents to the local HD. Here's the code I have thus far (crashes if there's a sub-directory, else grabs all the files): import ftplib import configparser import os def runBackups(): #Load INI filename = 'connections.ini' config = configparser.SafeConfigParser() config.read(filename) connections = config.sections() i = 0 while i < len(connections): #Load Settings uri = config.get(connections[i], "uri") username = config.get(connections[i], "username") password = config.get(connections[i], "password") backupPath = config.get(connections[i], "backuppath") archiveTo = config.get(connections[i], "archiveto") #Start Back-ups ftp = ftplib.FTP(uri) ftp.login(username, password) ftp.set_debuglevel(2) ftp.cwd(backupPath) files = ftp.nlst() for filename in files: ftp.retrbinary('RETR %s' % filename, open(os.path.join(archiveTo, filename), 'wb').write) ftp.quit() i += 1 print() print("Back-ups complete.") print()

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• Rendering to a single Bitmap object from multiple threads

  - by Lee Treveil

  What im doing is rendering a number of bitmaps to a single bitmap. There could be hundreds of images and the bitmap being rendered to could be over 1000x1000 pixels. Im hoping to speed up this process by using multiple threads but since the Bitmap object is not thread-safe it cant be rendered to directly concurrently. What im thinking is to split the large bitmap into sections per cpu, render them separately then join them back together at the end. I haven't done this yet incase you guys/girls have any better suggestions. Any ideas? Thanks

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• How do the routers communicate with each other ?

  - by Berkay

  Let's say that i want make a request a to a web page which is hosted in Europe (i live in USA).My packets only consist the IP address of the web page, first the domain name to ip address transformation is done, then my packets start their journey through to europe. i assume that MAC addresses never used in this situation? are they? First, my packets deal with many routers on way how these routers communicate with each other?, are router addresses added to my packet headers ? Second, is there a specific path router to router comminication or which conditions affect this route? Third to cross the Atlantic Ocean, are cables used or... ?

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• UL+CSS for grid layout

  - by nailxx

  Hi all, I have a server-generated html like: <ul> <li><!-- few nested elements that form a block --></li> <li><!-- few nested elements that form anaother block --></li> <li><!-- etc, X times --></li> </ul> All blocks have known width 200px and unknown height. I want <li> to be arranged in table-like fashion like this: What I have for now is following css: li { display: block; width: 200px; float: left; margin: 10px; } All is fine except that columns don't get equal height. And in example above block #4 “snatch” at #1 and the result isn't what I'm trying to achieve: Is there any pure-CSS cross-browser way that will allow grid layout I want and will not enforce markup change?

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• Exporting XML from FIleMaker Pro Server

  - by Jeno

  FileMaker Pro 10 Server: Mac OS X Server 10.4.11 DAtA Server: Windows Server 2008 I am having problem cross platform issue when exporting XML from FileMaker Pro client on a Mac to DATA Server. My FileMaker Pro server is hosting on a Mac OS X and the I need user to export their data to a DATA server which is hosting on a Windows Server. I created a button(function/script) in the FileMaker form for user to export data once they finish with their job. FileMaker Pro client on the PC works perfectly but It does't work on the MAC. I've tried every combination I can think of for the location path as documented on: http://www.filemaker.com/11help/html/create_db.8.32.html#1030283 Any idea? Thanks

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• PostgreSQL server not showing up in phpPgAdmin

  - by morpheous

  I have installed both phpPgAdmin and pgAdmin III on my Ubuntu 9.10 dev box. I created a server using pgAdmin III, and then added a database and populated it. I then navigated to phpPgAdmin, expecting to be able to see the server and be able to log on to the server using the postgres account. However, the only server shown 'PostgreSQL' (and it had a red cross icon). When I attempted to login using the postgres account, the following message was displayed: Login disallowed for security reasons. I have the following questions: Where is the server and database I created (they are still visible when I use pgAdmin III) How may I add another user to the server and give it access to a database?

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• Mysql SELECT nested query, very complicated?

  - by smartbear

  Okay, first following are my tables: Table house: id | items_id | 1 | 1,5,10,20 | Table items: id | room_name | refer 1 | kitchen | 3 5 | room1 | 10 Table kitchen: id | detail_name | refer 3 | spoon | 4 5 | fork | 10 Table spoon: id | name | color | price | quantity_available | 4 | spoon_a | white | 50 | 100 | 5 | spoon_b | black | 30 | 200 | How to do a nested select statement, where I want to select id, name, color, price and quantity_available column, from the each value inside the 'items_id' column in 'house' table? This is very challenging!! EDIT: after read robin's answer Table house: id | items_id | house1 | 1 | house1 | 5 | house1 | 10 | house2 | 20 | If this it the house table, how to do the nested, join, or whatever select statement??

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• TinyMCE or HTML5's contentEditable attribute?

  - by Mike

  I have always hated wysiwyg editors but most of the applications I develop they are necessary for our clients to edit their content. After trying out a few different ones I seemed to like tinyMCE the best. Although powerful and seems to generate fairly good HTML it is not without its issues. Recently I have been thinking about creating a custom wysiwyg that suits my needs perfectly taking advantage of the contentEditable attribute. Is this HTML5 feature ready? Will I have many cross browser issues? What are its limitations? I guess my question finally boils down to; Will it be worth throwing in the towel on 3rd party wysiwygs and moving to contentEditable regions?

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• Porting a project to OpenGL3

  - by Decapsuleur

  Hi everyone, I'm working on a C++ cross-platform OpenGL application (Windows, Linux and MacOS) and I am wondering if some of you could share some advices on porting a large application to OpenGL 3. The reason I am looking into OpenGL 3 is because I think we could benefit a lot from using the new "Sync objects". Nvidia has supported such an extension since the Geforce 256 days (gl_nv_fences) but there seems to be no equivalent functionality on ATI hardware before OpenGL 3.0+... Our code makes quite heavy use of glut/freeglut, glu functions, OpenGL 2 extensions and CUDA (on supported hardware). The problem I am now facing is that "gl3.h" and "gl.h" are mutually incompatible (as stated in gl3.h). Do you guys know if there is a GL3 glut equivalent ? Also, looking at the CUDA-toolkit header files, it seems that GL-CUDA interoperability is only available when using older versions of OpenGL... (cuda_gl_interop.h includes gl.h...). Am I missing something ? Thanks a lot for your help.

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• Get children count via HQL

  - by Thomas Lötzer

  Hi, I have a one-to-many mapping between a parent entity and child entities. Now I need to find the number of children associated with each parent for a list of parents. I am trying to do this with HQL but I am not sure how I can get the list of parents in there. Also, I don't know how I can return the entity itself and not just its ID. My current HQL query is: select new map(parent.id as parentId, count(*) as childCount) from Parent parent left join parent.children children group by parent.id but this only returns the ID and does not filter on specific parents. EDIT Based on Pascal's answer I have modified the query to select new map(parent as parent, count(elements(parent.children)) as childCount) from Parent parent group by parent That does work, but is prohibitively slow: 30 seconds instead of 400 ms on the same database.

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• What is prefered method to set consistence font-size and line height for website using em?

  - by metal-gear-solid

  What is the best method to set cross-browser consistence typography (font-size and line height) for whole site using em for Fixed width {Width:970px}, centered website? I usually get design from client with multiple font size and line heights at various places in design. for some good reason i still use em without getting nested element problem and font-size inconsistencies in IE and others. then after setting how to manage and update easily ,and how to calculate ems I want to set easily manageable font sizes and I want to set Line height manually (because it can be different for various places in design. And for which things we should define line-height or for which not? How to set font-size and line-height to get consistent result. and if i'm using em for font-sizing then should i also use bottom-margin of h1, p, li etc in em? HTML {} BODY {} P {} a {} ul li a {} ul li ul li a {} p img {float:left} td,th { }

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• EXTEND_MODEL_CASES SQL 2005 workaround

  - by user282382

  Hi, I have a time series based mining model in SQL 2005 Analysis Serveries. I understand in 2008 you can do what if analysis by using EXTEND_MODEL_CASES with a Natural Prediction Join. I'm looking for a workaround or some method of doing the same thing but with 2005. My time series has 3 inputs, and one predict_only. I'd like to use the prediction function to see what types of prediction it makes for 6-12 time intervals in the future with inputs in a separate table. Is there any way to do this or something similar? Thanks

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• One table, need multiple values from different rows/tuples

  - by WmasterJ

  I have tables like: 'profile_values' userID | fid | value -------+---------+------- 1 | 3 | [email protected] 1 | 45 | 203-234-2345 3 | 3 | [email protected] 1 | 45 | 123-456-7890 And: 'users' userID | name -------+------- 1 | joe 2 | jane 3 | jake I want to join them and have one row with two of the values like: 'profile_values' userID | name | email | phone -------+-------+----------------+-------------- 1 | joe | [email protected] | 203-234-2345 2 | jane | [email protected] | 123-456-7890 I have solved it but it feels clumsy and I want to know if there is a better way to do it. Meaning solutions that are either more readable or faster(optimized) or simply best-practice. Current solution: multiple tables selected, many conditional statements: SELECT u.userID AS memberid, u.name AS first_name, pv1.value AS fname, pv2.value as lname FROM users AS u, profile_values AS pv1, profile_values AS pv2, WHERE u.userID = pv1.userID AND pv1.fid = 3 AND u.userID = pv2.userID AND pv2.fid = 45; Thanks for the help!

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• Cleaning up temp folder after long-running subprocess exits

  - by dbr

  I have a Python script (running inside another application) which generates a bunch of temporary images. I then use subprocess to launch an application to view these. When the image-viewing process exists, I want to remove the temporary images. I can't do this from Python, as the Python process may have exited before the subprocess completes. I.e I cannot do the following: p = subprocess.Popen(["imgviewer", "/example/image1.jpg", "/example/image1.jpg"]) p.communicate() os.unlink("/example/image1.jpg") os.unlink("/example/image2.jpg") ..as this blocks the main thread, nor could I check for the pid exiting in a thread etc The only solution I can think of means I have to use shell=True, which I would rather avoid: cmd = ['imgviewer'] cmd.append("/example/image2.jpg") for x in cleanup: cmd.extend(["&&", "rm", x]) cmdstr = " ".join(cmd) subprocess.Popen(cmdstr, shell = True) This works, but is hardly elegant, and will fail with filenames containing spaces etc.. Basically, I have a background subprocess, and want to remove the temp files when it exits, even if the Python process no longer exists.

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• Best open source alternative for MS Visual Source Safe?

  - by afsharm

  We are leaving VSS for TFS or any other alternatives. I'm the one who persists to go for an open source alternative like SVN. Now I'm searching for a good open source Version Control regarding following aspects: We are in love with open source movement and cross-platform. Could it be possible to use it with Mono, SharpDevelop and Express editions of VS instead of Visual Studio itself? What about backup? Is it integrated with VS without serious problems? Any API or command prompt access? Please notice I've read following previous texts about it but still need more help: http://stackoverflow.com/questions/690766/vss-or-svn-for-a-net-project http://stackoverflow.com/questions/61959/tfs-vs-open-source-alternatives http://stackoverflow.com/questions/44588/how-to-convince-a-company-to-switch-their-source-control

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• How do I pan the contents of a div when the right mouse button is dragged?

  - by Shaunwithanau

  I need a cross browser way of capturing the right mouse click, preventing the default context menu and making it where when the user drags the mouse they can pan the contents of a div. This is largely similar to Google maps in that they will grip the contents and drag to see what they want. No external libraries please. I am already capturing the events, and know that this will prevent default actions: if (evt.preventDefault) { evt.preventDefault(); } else { evt.returnValue = false; } But this doesn't prevent the context menu AFAIK. Edit: I really am unsure about how to prevent the context menu and what the best way to manipulate the scroll bars would be? examples would be great

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• MS SQL and .NET Typed Dataset AllowDBNull Metadata

  - by Christian Pena

  Good afternoon, I am generating a typed dataset from a stored procedure. The stored procedure may contain something like: select t1.colA, t2.colA AS t2colA from t1 inner join t2 on t1.key = t2.key When I generate the typed dataset, the dataset knows whether t1.colA allows NULLs, but it always puts FALSE in AllowDBNull for t2.colA even if t2.colA allows NULL. Is this because the column is aliased? Is there any way, from SQL, to hint to VS that the column allows NULL? We currently have to go in and update the column's AllowDBNull if we regenerate the table. Thanks in advance. Christian

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• How to use Mesa3D on Mac OS X and Windows

  - by gutsblow

  Hello all, I need to use Mesa3D for a cross platform application(windows and Mac only) which uses only offline software rendering. The reason I wanted to use Mesa3D is because it has the same Drawing calls as OpenGL and they are really easy. Now I know that Apple itself has a software implementation (which I heard is flaky), but I prefer using Mesa so that it's a lot easier for me to maintain the code on both platforms. On windows I managed to compile three DLL's from the Mesa3d source, but don't know what to do with them. On Mac OS X I am completely clueless. I would highly appreciate your help. Thank you once again very much!

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