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• Force redraw before long running operations

  - by Joshua

  When you have a button, and do something like: Private Function Button_OnClick Button.Enabled = False [LONG OPERATION] End Function Then the button will not be grayed, because the long operation prevents the UI thread from repainting the control. I know the right design is to start a background thread / dispatcher, but sometimes that's too much hassle for a simple operation. So how do I force the button to redraw in disabled state? I tried .UpdateLayout() on the Button, but it didn't have any effects. I also tried System.Windows.Forms.DoEvents() which normally works when using WinForms, but it also had no effect.

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• How to output floating point numbers with a custom output format in C++?

  - by Victor Liu

  The problem is that I want to output Mathematica compatible floating point numbers. The only difference with the standard IOStream or printf output format is that the exponential e is replaced by *^: Standard C/C++ output format: 1.23e-4 Mathematica format: 1.23*^-4 Is there a way to manipulate streams to achieve this effect? My original idea was just to use istringstream and dump it to a string and then replace all the e's. I would also be okay if someone posted code to parse through the bits of the floating point number and output it directly (i.e. a printf("%e") replacement).

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• IE JavaScript Mystery

  - by William Calleja

  I have the following JavaScript function function headerBanner(){ var current = $('.bannerImages img:nth-child('+bannerIndex+')').css('display', 'none'); if(bannerIndex== $('.bannerImages img').size()){ bannerIndex= 1; }else{ bannerIndex= (bannerIndex*1)+1; } var next = $('.bannerImages img:nth-child('+bannerIndex+')').css('display', 'block'); } In every browser on the planet, with the exception of IE (8, 7 or less), the above code is working correctly. In Internet Explorer it's going through it and having no effect. I've put alerts at every line of the function and they all fire, even in IE, but the banner simply doesn't change. Is there any reason as to why this is so?

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• Stop Rails from unloading a module in development mode

  - by Gareth

  I have a module in my Rails app that lives in /lib module MyModule mattr_accessor :the_variable class << self def setup yield this end end end From my environments/#{RAILS_ENV}.rb file I can then set an environment-specific value for the_variable: MyModule.setup do |my_module_config| my_module_config.the_variable = 42 end This is lovely, and it seems to work (almost) fine. The problem is that in development mode, Rails via ActiveSupport::Dependencies unloads a load of modules, and reloads them in time for the new request. This is usually a great behaviour because it means you don't need to restart your localhost server when you make a code change. However, this also clears out my initialised the_variable variable, and when the next request comes in the initialiser (obviously) isn't run again. The net effect is that subsequent requests end up having MyModule.the_variable set to nil rather than the 42 that I'm looking for. I'm trying to work out how to stop Rails unloading my module at the end of the request, or alternatively find another way to cleanly provide environment specific configuration for my modules. Any ideas? :-/

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• JQuery click event, not working

  - by Roland

  I have the following scenario. I have a index.php page with the following JQuery code included jQuery(document).ready(function(){ jQuery('#sIMG img').click(function(){ var currentSRC = jQuery(this).attr('src'); var altSRC = jQuery(this).attr('title'); var imgID = jQuery(this).attr('id'); var cat = jQuery(this).attr('name'); /*Fade, Callback, swap the alt and src, fade in */ jQuery('#main').fadeOut('fast',function(){ jQuery('#main').load("detail.php?id="+imgID+"&category="+cat); jQuery('#main').fadeIn('fast'); }); }); }); Now I have two div tags called #main and #right in the index.php page. When I click on a menu item right changes to a bunch of images, if I click on one of those images the above code should take effect and load into the main div, but it's just not working. the images are located within a div called sIMG. Any help will be appreciated

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• Is it necessarily bad style to ignore the return value of a method

  - by Jono

  Let's say I have a C# method public void CheckXYZ(int xyz) { // do some operation with side effects } Elsewhere in the same class is another method public int GetCheckedXYZ(int xyz) { int abc; // functionally equivalent operation to CheckXYZ, // with additional side effect of assigning a value to abc return abc; // this value is calculated during the check above } Is it necessarily bad style to refactor this by removing the CheckXYZ method, and replacing all existing CheckXYZ() calls with GetCheckedXYZ(), ignoring the return value? The returned type isn't IDisposable in this case. Does it come down to discretion?

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• Can a flex app (or a portion of a flex app) be made transparent to mouse clicks?

  - by Sam Jones

  I need to superimpose my Flex app above a plain HTML control on a web page, and be able to click through the Flex app to interact with the HTML control. Is there any way to do this? No permutation of mouseEnabled="false" or mouseChildren="false" seems to have the desired effect. Context: trying to integrate Google Earth API (JavaScript/HTML) with my flex app. I am leaving a portion of the flex app transparent and empty, and positioning the Google Earth widget just below that point in the z-index. Google Earth has to be behind flex, because there are some Flex controls periodically displayed in that space.

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• WPF texbox focus when render to offscreen buffer

  - by dr.mo

  i am rendering a textbox to an offscreen buffer using RenderTargetBitmap and i want to enter text into this textbox, however, i can't set the textbox focus (using Focus() has no effect - presumably because the canvas is not attached to a real window?) this has two consequenes: 1 the keyboard input doesn't get captured 2. even if i set the text manually using TextBox text and CaretIndex = index i dont get a caret because of the lack of focus. is there a way to make this focus somehow? and if not, i'd like to at least have the caret visible even if there is no focus, but can't see a way of doing this.

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• Prevent painting of .NET form while form is loading?

  - by dvcolgan

  Is there a way to turn off all visual updates to a .NET form while I am manipulating it? When my program first loads, for example, I set the tab control to the tab that was last open. The user can see the program switching tabs. I have looked into SuspendLayout and ResumeLayout, but either I don't understand what they are doing, or I am not using them correctly, because they don't seem to have any effect. Someone told me that there used to be a way to turn off paint events in VB 6. Does this still exist in .NET?

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• Setting QTMovie attributes

  - by Josh Matthews

  I'm trying to create a QTVR movie via QTKit, and I've got all the frames in the movie. However, setting the attributes necessary doesn't seem to be having any effect. For example: NSNumber *val = [NSNumber numberWithBool:YES]; [fMovie setAttribute:val forKey:QTMovieIsInteractiveAttribute]; val = [NSNumber numberWithBool:NO]; [fMovie setAttribute:val forKey:QTMovieIsLinearAttribute]; If I then get the value of these attributes, they come up as NO and YES, respectively. The movie is editable, so I can't understand what I'm doing wrong here. How can I ensure that the attributes will actually change?

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• SQL: without a cursor, how to select records making a unique integer id (identity like) for dups?

  - by Dr. Zim

  If you have the select statement below where the PK is the primary key: select distinct dbo.DateAsInt( dateEntered) * 100 as PK, recordDescription as Data from MyTable and the output is something like this (the first numbers are spaced for clarity): PK Data 2010 01 01 00 New Years Day 2010 01 01 00 Make Resolutions 2010 01 01 00 Return Gifts 2010 02 14 00 Valentines day 2010 02 14 00 Buy flowers and you want to output something like this: PK Data 2010 01 01 01 New Years Day 2010 01 01 02 Make Resolutions 2010 01 01 03 Return Gifts 2010 02 14 01 Valentines day 2010 02 14 02 Buy flowers Is it possible to make the "00" in the PK have an "identity" number effect within a single select? Otherwise, how could you increment the number by 1 for each found activity for that date? I am already thinking as I type to try something like Sum(case when ?? then 1 end) with a group by.

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• asynchronous method executing

  - by alexeyndru

  I have a delegate method with the following tasks: get something from the internet (ex: some image from a web site); process that image in a certain way; display the result in a subview ; getting the image takes some time, depending on the network's speed so the result of its processing is displayed in the subview after that little while. my problem: during the time between getting the image and showing the result the device looks unresponsive. any attempt to put some spinner, or any other method which is called inside this main procedure has no effect until the result is processed. how should I change this behaviour? I would like to put a big spinner during that waiting time. thank you.

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• Display/Hide part of a list

  - by superexsl

  Hi I have an (unordered)list (generated by a repeater) of items. However, I'd like to show the first three items, and have the rest hidden by the main content div. When a button is pressed, I would like the list's div to expand, pushing the main content div down and showing the rest of the list. I was thinking of using slideDown(), but that closes the entire div ( and I would like to show the first 3 items of the list). What would be the best way to achieve an effect like this? Is there a plugin that can easily show X items of a list and the display the rest upon request? Thanks

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• mysql_close(): supplied argument is not a valid MySQL-Link resource

  - by Illes Peter

  Here's what I'm trying to do: I've got a db.php file that does all the db manipulation. It has 2 static methods, connect and deconnect. In my other file i simply use db::connect() and db::deconnect(). The mysql_close($con) in the deconnect method just doesn't know who $con is. Since I don't want to instantiate my class static is the only way to go. Declaring 'private $con' in class db doesn't seem to have an effect. Any ideas? class db { public static function connect() { $dbData = parse_ini_file($_SERVER['DOCUMENT_ROOT'].'/config.ini'); $con = mysql_connect($dbData['host'],$dbData['user'],$dbData['pass']); $db = mysql_select_db($dbData['db']); if ((!$con) || (!$db)) return 0; else return 1; } public static function deconnect() { mysql_close($con); } }

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• Python appengine Query does not work when using a variable.

  - by Lloyd

  Hi, I am trying to use a fetcher method to retrieve items from my datastore. If I use the following def getItem(item_id): q = Item.all() q.filter("itemid = ", item_id) It fails because nothing is returned. If I hard code in an item like def getItem(item_id): q = Item.all() q.filter("itemid = ", 9000) it fetches just fine, and sings merrily along. I have tried every which way to get this to work. I have used result = db.GqlQuery("SELECT * FROM Item WHERE item_id = :1 LIMIT 1", title).fetch(1) to the same effect. If I hard code in a number, works fine. I have tried setting the select statement as a local string, assembling it that way, casting the int as a string, and nothing. When I output the SELECT statement to the screen, looks fine. I can cut ans paste the output into the string, and whammo, it works. Any help would be appreciated.

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• Void in main and keeping Dos program from dying

  - by TimothyTech

  Alright, so im using bloodshed complier, first thing i should note is im using a 2001 edition C++ for the aboslute beginner, was there any changes to C++ since 2001 that would effect the validity of this book? i ask because i know php has php5 and now php6 but i havent seen any C++3. now for the reason i asked that, in this code it uses, void main (void) why would i want an arguement to be void? what does this do. But when i run the " void main (void) in my compiler it says that main must have a "int" before it. so i cant have "void" main (void); also, once the code runs through, as long as there isnt a "cin" the program closes. is this normal behavior, is there a better way to stop this besides making a cin at the end of my program.

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• stop the CSS filter property cascading

  - by Ayoub

  I tried to make box-shadow affect work cross browsers, in order to make ie work I used "filter" property but the effect cascades to the child element (in my case a span) I tried to stop it by using filter : none but it didn't work searched the web but I couldn't find a solution. please help me solve this problem. HTML code : <div id="shadow"> <span>text text</span> </div> CSS code : #shadow{ -moz-box-shadow: 3px 3px 4px #000; -webkit-box-shadow: 3px 3px 4px #000; box-shadow: 3px 3px 4px #000; /* For IE 8 */ -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=4, Direction=135, Color='#000000')"; /* For IE 5.5 - 7 */ filter: progid:DXImageTransform.Microsoft.Shadow(Strength=4, Direction=135, Color='#000000'); }

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• jQuery:Problem in Chaining the events.

  - by Shyju

  I have the following javascript function which will load data from a server page to the div This is working fine with the FadeIn/FadeOut effects function ShowModels(manuId) { var div = $("#rightcol"); div.fadeOut('slow',function() { div.load("../Lib/handlers/ModelLookup.aspx?mode=bymanu&mid="+manuId, { symbol: $("#txtSymbol" ).val() }, function() { $(this).fadeIn(); }); }); } Now i want to Show a Loading Message till the div loads the contents from the server page I tried this.But its not working.Can any one help me to debug this ? Thanks in advance function ShowModels(manuId) { var div = $("#rightcol"); var strLoadingMsg="<img src='loading.gif'/><h3>Loading...</h3>"; div.fadeOut('slow',function() { div.load(strLoadingMsg,function(){ div.load("../Lib/handlers/ModelLookup.aspx?mode=bymanu&mid="+manuId, { symbol: $("#txtSymbol" ).val() }, function() { $(this).fadeIn(); }); }); }); } My ultimate requirement is to FadeOut the current content.Show the Loading message.Show the Data coming from server with a FadeIn effect

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• Qt toggle always on top for a QMainWindow

  - by Jake Petroules

  void MainWindow::on_actionAlways_on_Top_triggered(bool checked) { Qt::WindowFlags flags = this->windowFlags(); if (checked) { this->setWindowFlags(flags | Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint); this->show(); } else { this->setWindowFlags(flags ^ (Qt::CustomizeWindowHint | Qt::WindowStaysOnTopHint)); this->show(); } } The above solution works but because setWindowFlags hides the window, it needs to be reshown and of course that doesn't look very elegant. So how do I toggle "always on top" for a QMainWindow without that "flashing" side effect?

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• Reverting back to previous ADT plugin

  - by sdfwer

  Now I was wondering if anyone has been able to accomplish reverting to a previous ADT plugin. The reason for this is because I am using an open source jar and I am getting the following errors on my LogCat such as: unable to resolve virtual method unable to find class referenced in signature unable to resolve new-instance The effect of this causes an error on running my android application on the debugger. I was using android ADT 15 before now I am updated to 17. Please help on finding a solution to resolve the issue. Edit* Forgot to add in The error "java.lang.NoClassDefFoundError". In simple terms it can't find classes or methods the attached jar even though it allows it.

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• How to find what element mouse is over in Prototype

  - by DavidP6

  I have a situation where an element is shown using ajax. I have attached mouseenter and mouseleave events to it to show a menu connected to the element using prototype. This works fine, but the problem I am having is that if a user has his/her mouse in the place where the element is shown before it is shown, the mouseenter does not get triggered and the attached menu does not get shown. I already have an afterFinish function that is called after a SlideDown effect, so I was thinking I could put another function in there to check if the users mouse is over the element or not. How would I go about checking what element the users mouse is over in prototype?

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• Excel 2007 - Worksheet is larger than the window

  - by Chris

  Hi This is an odd problem but frustrating none the less. I have a worksheet saved which is larger than the Excel 2007 "workarea". This means when I open the worksheet I cannot access the corners of the worksheet to reduce the size and the worksheets title bar area (with move,size,minimise etc) is hidden beneath the ribbon , even if I remove the ribbon , I still can't see the title bar. In Excel 2003 I've had a similar effect but I've always been able to hit the "alt" key to access the "Move" option. However in Excel 2007 , hitting "alt" brings up some shortcuts for the ribbon etc but I can't access the worksheet options. Has anyone else know how to access the worksheet drop down when this happens?

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• Making animation on sIFR3

  - by Tomo

  Hello all, Now I'm using sIFR3. It works very nicely. Additionally, I would like to put an effect on sIFR. My idea is that when the page loaded, sIFR(ed) texts change its color. For example, sIFR in list item change color one by one. The purpose is to emphasize the sIFR(ed) texts. Reading the document, I thought Flash filters are not for like this animation. Do you think is it possible to make animation on sIFR ? Thank you for your help.

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• Can my app arrange a gdb breakpoint or watch?

  - by Larry Gritz

  Is there a way for my code to be instrumented to insert a break point or watch on a memory location that will be honored by gdb? (And presumably have no effect when gdb is not attached.) I know how to do such things as gdb commands within the gdb session, but for certain types of debugging it would be really handy to do it "programmatically", if you know what I mean -- for example, the bug only happens with a particular circumstance, not any of the first 11,024 times the crashing routine is called, or the first 43,028,503 times that memory location is modified, so setting a simple break point on the routine or watch point on the variable is not helpful -- it's all false positives. I'm concerned mostly about Linux, but curious about if similar solutions exist for OS X (or Windows, though obviously not with gdb).

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• Resetting AUTO_INCREMENT on myISAM without rebuilding the table

  - by Artem

  Please help I am in major trouble with our production database. I had accidentally inserted a key with a very large value into an autoincrement column, and now I can't seem to change this value without a huge rebuild time. "ALTER TABLE tracks_copy AUTO_INCREMENT = 661482981" Is super-slow. How can I fix this in production? I can't get this to work either (has no effect): myisamchk tracks.MYI --set-auto-increment=661482982 Any ideas? Basically, no matter what I do I get an overflow: SHOW CREATE TABLE tracks CREATE TABLE tracks ( ... ) ENGINE=MYISAM AUTO_INCREMENT=2147483648 DEFAULT CHARSET=latin1

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