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• Changing content of HTMLDocument displayed in a JTextPane

  - by kayahr

  I'm displaying some tables as HTML code (rendered by a Freemarker template) with a JTextPane. I also have some HTML links in this HTML output which can be used to interact with the values of the table (For example "Delete a row" and stuff like this). Currently I always recreate the whole HTML output on each change and replace the whole document in the JTextPane with the new one. This is getting really slow and the JTextPane always changes the scroll position when I do this. Is it possible to change only parts of the HTML code during runtime without replacing the whole document? In a real browser I would use the DOM and do something like document.getElementById("price").innerHTML = "$123.44". Is something like that possible with the HTMLDocument in a JTextPane?

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• Errata for Java Language Specification 3rd Edition

  - by polygenelubricants

  I use JLS extensively both as a learning and teaching resource, but I've noticed that there are some errors in it. There's the simple typos (e.g. JLS 5.1.4 "convesions"), but there's also some that I consider quite serious errors. For example, JLS 18.1 The Grammar of the Java Programming Language is supposed to be the authoritative reference for the grammar of the Java language, but it contains a production rule that never gets used! (e.g. MoreStatementExpressions). Surely this is a sign of more serious errors in other parts of the given grammar, right? So is there an errata for the 3rd edition? Will there ever be? Should we send errors we've found to Sun/Oracle? Will there ever be a 4th edition?

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• Conversion of pointer-to-pointer between derived and base classes?

  - by Mike Mueller

  Regarding the following C++ program: class Base { }; class Child : public Base { }; int main() { // Normal: using child as base is allowed Child *c = new Child(); Base *b = c; // Double pointers: apparently can't use Child** as Base** Child **cc = &c; Base **bb = cc; return 0; } GCC produces the following error on the last assignment statement: error: invalid conversion from ‘Child**’ to ‘Base**’ My question is in two parts: Why is there no implicit conversion from Child** to Base**? I can make this example work with a C-style cast or a reinterpret_cast. Using these casts means throwing away all type safety. Is there anything I can add to the class definitions to make these pointers cast implicitly, or at least phrase the conversion in a way that allows me to use static_cast instead?

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• Cocoa Touch - Display an Activity Indicator while loading a UITabBar View

  - by Aurum Aquila

  I have a UITabBar Application with two views that load large amounts of data from the web in their "viewWillAppear" methods. I want to show a progress bar or an activity indicator while this data is being retrieved, to make sure the user knows the app isn't frozen. I am aware that this has been asked before. I simply need some clarification on what seems to be a rather good solution. I have implimented the code in the example. The question's original asker later solved their problem, by putting the retrieval of data into another "thread". I understand the concept of threads, but I do not know how I would impliment this. With research, I have found that I need to move all of my heavy data retrieval into a background thread, as all of the UI updating occurs in the main thread. If one would be so kind as to provide an example for me, I would be very appreciative. I can provide parts of my existing code as necessary.

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• Does C99 guarantee that arrays are contiguous ?

  - by kriss

  Following an hot comment thread in another question, I came to debate of what is and what is not defined in C99 standard about C arrays. Basically when I define a 2D array like int a[5][5], does the standard C99 garantee or not that it will be a contiguous block of ints, can I cast it to (int *)a and be sure I will have a valid 1D array of 25 ints. As I understand the standard the above property is implicit in the sizeof definition and in pointer arithmetic, but others seems to disagree and says casting to (int*) the above structure give an undefined behavior (even if they agree that all existing implementations actually allocate contiguous values). More specifically, if we think an implementation that would instrument arrays to check array boundaries for all dimensions and return some kind of error when accessing 1D array, or does not give correct access to elements above 1st row. Could such implementation be standard compilant ? And in this case what parts of the C99 standard are relevant.

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• Problem with filling dataset

  - by Brian

  This is a small portion of my code file. Each time my debugger reaches the line 'NewDA.Fill(NewDS);' at runtime it jumps to the catch. I'm positive the daynumber variable gets a value that's present in the database and I've tried the query outside of the codefile on my database and it works fine. I'm also using the connectionstring 'db' on more parts of the code with successful results. string QueryNew = "SELECT activityname AS [Name], activitycategorynumber AS [Category] " + "FROM ACTIVITY WHERE daynumber = @daynumber"; SqlCommand NewCmd = new SqlCommand(QueryNew, db); NewCmd.Parameters.Add("@daynumber", SqlDbType.Int).Value = daynumber; SqlDataAdapter NewDA = new SqlDataAdapter(NewCmd); DataSet NewDS = new DataSet(); NewDA.Fill(NewDS);

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• what's a good way to synchronize a sql server 2008 database from a 2005 database automatically?

  - by Keith Nicholas

  Ok, the scenario is... two servers, on completely different parts of the internet. The sql 2008 database just needs to get data updates and schema changes. It doesn't need to send anything to the 2005 database. Basically just suck data and schema as efficiently as possible automatically as a scheduled task. The database is quite huge.... but the changes per day are probablly around 20/30 megabytes of data/ I can't run any of the inbuilt replication on the 2005 database. I've had a wee look at the Sync Framework, I think that might do what I want, but seems a bit painful and requires a bit of work to get going. I'm wondering if there is tooling out there to make this easier? or?? not quite sure what my options are.

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• Restlet - Access elements of the request URL

  - by DutrowLLC

  I'm unsure what the proper way is to access parts of the requested URL. In this case, I want to get the requested path without the query variables. This is the only way I found to do it: String path = getRequest().getResourceRef().getHostIdentifier() + getRequest().getResourceRef().getPath(); The result would be the bold part of this url: http://stackoverflow.com/questions/ask?query=value I also found about 6 different ways to get the server name (http://stackoverflow.com) but I'm worried that some of them would fail in certain cases that I am unaware of (why would there be 6 different ways to do one thing): getRequest().getHostRef().getHostIdentifier(); getRequest().getHostRef().getIdentifier(); getRequest().getRootRef().getHostIdentifier(); getRequest().getRootRef().getIdentifier(); getRequest().getResourceRef().getHostIdentifier(); And this seems to get the complete URL with query parameters: getRequest().getResourceRef().getIdentifier(); Any further explanation would be much appreciated.

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• Track pageviews in Google Analytics on partial url of Grails application

  - by Pieter van Gent

  For my Grails application I want to set up Google Analytics to track only "partial" url's. I 'll explain: a typical Grails url consists of the following parts: domain + application-name + controller + action + id e.g. www.mydomain.com/myapp/controller/action/12345 As far as I understand for Google Analytics the page to be tracked is identified by the entire url. For my purpose I'm not interested in the id part of the url: I want to know which actions have been performed, but I need not know for which id the action was executed. And of course I would like a generic solution, because I have multiple controllers and multiple actions... Maybe some kind of filter stating "I want to track pages 3 levels deep (/myapp/controller/action)" would do? Or a filter stating "exclude everything from url after the last /"? Any help would be much appreciated. Kind regards, Pieter

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• Automated payment notification with php

  - by Rob Y

  I'm about to integrate automated payments into a site. To date, I've successfully used paypal for a number of projects, but these have always been sites which sell physical goods, meaning I can upload the cart contents, user pays, person physically ships goods. This site is a one off payment to enable extra features on a web app. My current thinking is to go down the paypal IPN route to get a notification back and update the users account based on the successful payment. Question is in two parts: 1 - is there a better / simpler way? (any payment processor considered) 2 - does anyone know of a code library or plug in for php which will speed up my integration? Thanks for your help. Rob

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• Form Design ScriptControlClass

  - by raghumithra

  I am working on a form designer. We have two parts: first is designing form by placing controls, and second is writing VB code in rich text editor. How do i integrate design and code (events of the controls) in runtime? I am using ScriptControlClass Form4 f4 = new Form4(); f4.Name = "dgfdfg"; f4.Text = "Raghudfgmithra"; Button btn = new Button(); btn.Text = "HI"; btn.Left = 25; btn.Top = 50; btn.Name = "btnSubmit"; f4.Controls.Add(btn); script.AddObject("form", f4, true); script.AddCode("???????????); script.ExecuteStatement(????????????);

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• Difference between 'scope' and 'namespace'?

  - by katriel

  What is the difference, in general, between the concepts of namespaces and scope? To my understanding, both describe the parts of a program in which a variable/object/method/function will be accessible. I understand that 'scope' tends to be a property of the variable (e.g., "This variable has global scope"), while a 'namespace' is a property of the program (e.g., "A Python function creates a local namespace"). Are there other differences? Global scope vs global namespace addresses a slightly narrower question: global namespaces in C++. http://www.alan-g.me.uk/tutor/tutname.htm states, There are a few very subtle differences between the terms but only a Computer Scientist pedant would argue with you, and for our purposes namespace and scope are identical. What are those subtle differences? Under what circumstances or with which kinds of languages do people use each concept?

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• System.IndexOutOfRange Exception Sending Gridview Values to DataTable

  - by SidC

  Hello, I am writing an ASP.NET 3.5 application and need to send gridview values to a datatable for use in a listbox control as part of a quote process. I have written the following VB code in my Page_Load: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim dtSelParts As DataTable = New DataTable("dtSelParts") Dim column As DataColumn = New DataColumn column.ColumnName = "PartName" column.ColumnName = "PartNumber" column.ColumnName = "Quantity" dtSelParts.Columns.Add(column) For Each row As GridViewRow In MySearch.Rows Dim drSelParts As DataRow drSelParts = dtSelParts.NewRow() For i As Integer = 0 To row.Cells.Count - 1 drSelParts(i) = row.Cells(i).Text Next Next End Sub When I run the partsearch.aspx page, I enter values in the row textbox for parts I want included in the listbox (to be included in quote). However, I receive the error message System.Index.OutOfRangeException: Cannot find column 1 which occurs on the line drSelParts(i) = row.Cells(i).Text. How might I correct the code and resolve the error? Thanks, Sid

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• how do I automatically execute javascript?

  - by user317005

  how do I automatically execute javascript? I know of < body onLoad="" , but I just thought maybe there is another way to do it? html: <html><head></head><body><div id="test"></div></body></html> javascript: <script>(function(){var text = document.getElementById('test').innerHTML;var newtext = text.replace('', '');return newtext;})();</script> I wanna get the text within "test", replace certain parts, and then output it to the browser. Any ideas on how to do it? I'd appreciate any help. Thanks.

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• Odd results when searching for numbers using IXSSO.Query

  - by Vic

  Hi, from classic asp on Windows 2008, using an IXSSO.Query, when searching for a string of numbers, for example 10000000001, I receive results that also include variations to this, like 10000000002 10000000003 and so on. If I change the first digit so the search string is 20000000001 I dont get anything. If I keep moving the last digit from my first example to the left, I keep getting hits until I reach the half way point when I get no results! So in other words 10000020000 will return results like in the first example but 10000200000 does not. This all sounds like to me that its doing a match on the first 6 characters and it ignores the rest... Here is relevant parts of the Set oQuery = Server.CreateObject("IXSSO.Query") oQuery.Catalog = SEARCH_CATALOG oQuery.Query = "@all " & searchstr Set oRS = oQuery.CreateRecordset("nonsequential") Anyone got any ideas and/or suggestions? Thanks, Vic.

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• IE 8 dialog windows not decompressing files

  - by Mike

  Hi, I've got a website where we have pre-compressed all of our HTML files. In general this works fine, but since IE 8 has come out some people are finding that they can not use some parts of the website. We've used the showModalDialog command to open a dialog window and pointing to one of our pre-compressed files but it displays it just show up as strange characters (ie not decompressed). Now it only happens in the dialog. I'm pretty sure our compression is all fine because the page they are viewing to open the dialog is also compressed. Has anyone else come across this or got any suggestions cuz i'm stumped??? Thanks, Mike

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• Multi-part template issue with Jinja2

  - by Alan Harris-Reid

  Hi, When creating templates I typically have 3 separate parts (header, body, footer) which I combine to pass a singe string to the web-server (CherryPy in this case). My first approach is as follows... from jinja2 import Environment, FileSystemLoader env = Environment(loader=FileSystemLoader('')) tmpl = env.get_template('Body.html') page_body = tmpl.render() tmpl = env.get_template('Header.html') page_header = tmpl.render() tmpl = env.get_template('Footer.html') page_footer = tmpl.render() page_code = page_header + page_body + page_footer but this contains repetitious code, so my next approach is... def render_template(html_file): from jinja2 import Environment, FileSystemLoader env = Environment(loader=FileSystemLoader('')) tmpl = env.get_template(html_file) return tmpl.render() page_header = render_template('Header.html') page_body = render_template('Body.html') page_footer = render_template('Footer.html) However, this means that each part is created in its own environment - can that be a problem? Are there any other downsides to this approach? I have chosen the 3-part approach over the child-template approach because I think it may be more flexible (and easier to follow), but I might be wrong. Anyone like to convince me that using header, body and footer blocks might be better? Any advice would be appreciated. Alan

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• How do I detect if a display is in High Contrast mode?

  - by banjollity

  I'm testing my company's established Swing application for accessibility issues. With high contrast mode enabled on my PC certain parts of this application are rendered properly (white-on-black) and some incorrectly (black-on-white). The bits that are correct are the native components (JButton, JLabel and whatnot) and third party components from the likes of JIDE. The incorrect bits are custom components and renderers developed in-house without consideration for high-contrast mode. Clearly it's possible to detect when high-contrast mode is enabled. How do I do this?

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• Prevent status bar from receiving touch events

  - by Typeoneerror

  Edit After further testing, it appears that the part of my button that are not clickable are where the status bar used to be. I'm hiding the status bar with : // -- Override point for customization after app launch [[UIApplication sharedApplication] setStatusBarHidden:YES]; But it's still receiving touches. Any idea on how to disable this? Is there's a bounding box on an application that receives touch events? I created a few sample round rect buttons and placed them in different places in my view. The ones in the center of the view receive touch events (and show the highlighted blue color) but if I place a button near the edges of the view, only parts of them are clickable in the simulator. Is this because of Apples style guidelines? I placed a button exactly where a UITabNavigationItem would appear and only the bottom half of it is clickable.

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• Daylight saving time of current tz

  - by spam2

  Hi, in my c++ software I've used Boost in some parts and also for the local time. OK, now my problem is to make a check if in my machine is active or not the DST. With the follow part of code I can know only the difference from the UTC time. In my case the difference is 2 hours because is active the DST ptime tLoc = second_clock::local_time(); ptime tUTC = second_clock::universal_time(); time_duration tDiff = tUTC - tLoc; local_time_zone = tDiff.hours(); I think that the boolean funcion has_dst() can help, right? My system is Debian GNU/Linux. Thanks

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• Why isn't wchar_t widely used in code for Linux / related platforms?

  - by Ninefingers

  This intrigues me, so I'm going to ask - for what reason is wchar_t not used so widely on Linux/Linux-like systems as it is on Windows? Specifically, the Windows API uses wchar_t internally whereas I believe Linux does not and this is reflected in a number of open source packages using char types. My understanding is that given a character c which requires multiple bytes to represent it, then in a char[] form c is split over several parts of char* whereas it forms a single unit in wchar_t[]. Is it not easier, then, to use wchar_t always? Have I missed a technical reason that negates this difference? Or is it just an adoption problem?

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• WSS 3.0 navigation structure

  - by Dante

  Hi all, I'm a beginner in WSS 3.0 and I'm having some problems with the navigation setup. I can't find any documentation that clearly recommends best practices in this area. I'm trying to create an intranet, custom look and feel, that should have a structure similar to: Company - News - News type 1 - News type 2 - Organogram - ... Employees - Employees 1 - Employees 2 - Employees 2_1 - ... How to properly set this up? Company, News, are sites/subsites? And News type 1 and 2 are pages within a site? I created as described above and in the master page of the main site I added some scripts that will be used by web parts, like jquery. The subsites will have their own master page and will not recognize the scripts, I need to add them there which is annoying. Any recommendations? Or some resource that provides best practices setting up these structures? Thx in advance

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• Using a .Net Workstation Program With a LAMP Server

  - by Brian

  Hi, I am currently working on a project for a company with a Ubuntu LAMP server set up. All the workstations are on Windows XP/Vista. What we are trying to do is create a program to track parts in our warehouse. Server side would be programmed in PHP. However, I was thinking about using C# on the workstation side. Is this possible? If so, is this practical? What kind of problems could arise from something like this?

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• Design Patterns: What's the antithesis of Front Controller?

  - by Brian Lacy

  I'm familiar with the Front Controller pattern, in which all events/requests are processed through a single centralized controller. But what would you call it when you wish to keep the various parts of an application separate at the presentation layer as well? My first thought was "Facade" but it turns out that's something entirely different. In my particular case, I'm converting an application from a sprawling procedural mess to a clean MVC architecture, but it's a long-term process -- we need to keep things separated as much as possible to facilitate a slow integration with the rest of the system. Our application is web-based, built in PHP, so for instance, we have an "index.php" and an IndexController, a "account.php" and an AccountController, a "dashboard.php" and DashboardController, and so on.

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• Ruby: intelligent patch/update

  - by Shyam

  Hi, After being blown away by the greatness of irb and rails console, I am loving the dynamical parts of the language more and more. Now, I wonder if it would be possible for a Ruby application to update itself on-the-fly (if the write permission allows it). Can a Ruby application fetch an update and refresh itself? I have seen this functionality a lot in Apple applications and I know updates and fixes are something you must anticipate for when deploying an application. Thank you for your feedback, comments and answers!

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