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  • Any best practices with feedback colours?

    - by alex
    I have a few that I think are correct. These are background colours for messages. ERROR: red; INFO: blue; SUCCESS: green; NOT IMPORTANT INFO: yellow Have I got the blue and yellow around the wrong way? Any hex values that are a de facto standard for these? I am curious considering web development, but I think the answers will be agnostic. Here is an interesting thought (I'm sure I've read about it in an article). What colours would the errors be on Target's website, considering all their branding is red?

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  • UIVIewController wrong position before rotate

    - by zegnus
    I have the starter point of my application this window (white background): - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { mainScreen = [[MainScreenController alloc] initWithNibName:@"MainScreenController" bundle:[NSBundle mainBundle]]; // add it to the main window [window addSubview:[mainScreen view]]; // show view [window makeKeyAndVisible]; NSLog(@"started"); return YES; } And MainScreenController is an UIViewController with (blackBackground) created by the Interface Builder. The application executes perfectly but the first time, the black view is moved up like the height of the status iphone pannel (leaving white rectangle at the bottom). If I rotate the iPhone twice, the view is perfectly positioned in the right place, filling all the screen with the black background. Any idea? Thanks!

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  • How to Improve my php image resizer to support alpha png and transparent GIFs

    - by David
    Hi, I use this function to resize images but i end up with ugly creepy image with a black background if it's a transparent GIF or PNG with alpha, however it works perfectly for jpg and normal png. function cropImage($nw, $nh, $source, $stype, $dest) { $size = getimagesize($source); $w = $size[0]; $h = $size[1]; switch($stype) { case 'gif': $simg = imagecreatefromgif($source); break; case 'jpg': $simg = imagecreatefromjpeg($source); break; case 'png': $simg = imagecreatefrompng($source); break; } $dimg = imagecreatetruecolor($nw, $nh); switch ($stype) { case "png": imagealphablending( $dimg, false ); imagesavealpha( $dimg, true ); $transparent = imagecolorallocatealpha($dimg, 255, 255, 255, 127); imagefilledrectangle($dimg, 0, 0, $nw, $nh, $transparent); break; case "gif": // integer representation of the color black (rgb: 0,0,0) $background = imagecolorallocate($simg, 0, 0, 0); // removing the black from the placeholder imagecolortransparent($simg, $background); break; } $wm = $w/$nw; $hm = $h/$nh; $h_height = $nh/2; $w_height = $nw/2; if($w> $h) { $adjusted_width = $w / $hm; $half_width = $adjusted_width / 2; $int_width = $half_width - $w_height; imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h); } elseif(($w <$h) || ($w == $h)) { $adjusted_height = $h / $wm; $half_height = $adjusted_height / 2; $int_height = $half_height - $h_height; imagecopyresampled($dimg,$simg,0,-$int_height,0,0,$nw,$adjusted_height,$w,$h); } else { imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h); } imagejpeg($dimg,$dest,100); } Example : cropImage("300","200","original.png","png","new.png"); I use php 5.3.2 and the GD library bundled (2.0.34 compatible) How to make it support transparency? i've added imagealphablending() and imagesavealpha but it didn't work. Or atlast is there any similar good classes? Thanks

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  • String of KML needs to be converted to java objects

    - by spartikus
    I have a string of kml coming in on a request object. I have used xjc to create the kml java objects. I am looking for an easy way to create the kml nested java objects from this string. I could parse the string and create each object in the tree by hand but wouldn't it be cool if there was a library or something that would create the java objects for me? Something like KmlType type = parseKML(mykmlStringFromTheRequest); Then type would be a Tree of kml objects. Thanks for the help all.

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  • remove/unbind hover on anchors...

    - by Reigel
    html <a href="home.html">Home</a> css a { color: blue; } a:hover { color: red; } now as you can see <a> now would be color red on hover. Question How do I remove hover via jQuery? I have tried: $('a').unbind('hover'); and $('a').unbind('mouseenter mouseleave') I come to think why it won't work, is this not hover()? Please enlighten me... thanks

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  • Overriding disabled input and textarea with CSS

    - by igluratds
    Hi, Im trying to override the grey text of a disabled input and textarea. At the moment Im only really concerned with it working in Webkit and Mozilla. At the moment Im currently using every trick in the book that I know of: input[@disabled=true], input[@disabled], button[disabled]:active, button[disabled], input[type="reset"][disabled]:active, input[type="reset"][disabled], input[type="button"][disabled]:active, input[type="button"][disabled], select[disabled] > input[type="button"], select[disabled] > input[type="button"]:active, input[type="submit"][disabled]:active, input[type="submit"][disabled],input[disabled="disabled"], input[disabled] { color: black !important; } Sure it does change the colour if I change it to something else, however when I choose black it is still greyed out a bit. Any ideas? I am using Ext JS if I can use that to manipulate it. Thanks.

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  • python lxml problem

    - by David ???
    I'm trying to print/save a certain element's HTML from a web-page. I've retrieved the requested element's XPath from firebug. All I wish is to save this element to a file. I don't seem to succeed in doing so. (tried the XPath with and without a /text() at the end) I would appreciate any help, or past experience. 10x, David import urllib2,StringIO from lxml import etree url='http://www.tutiempo.net/en/Climate/Londres_Heathrow_Airport/12-2009/37720.htm' seite = urllib2.urlopen(url) html = seite.read() seite.close() parser = etree.HTMLParser() tree = etree.parse(StringIO.StringIO(html), parser) xpath = "/html/body/table/tbody/tr/td[2]/div/table/tbody/tr[6]/td/table/tbody/tr/td[3]/table/tbody/tr[3]/td/table/tbody/tr/td/table/tbody/tr/td/table/tbody/text()" elem = tree.xpath(xpath) print elem[0].strip().encode("utf-8")

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  • XPointers in SVG

    - by Nycto
    I've been trying to get XPointer URIs working in an SVG file, but haven't had any luck so far. After trying something more complicated and failing, I simplified it down to just referencing an ID. However, this still fails. The spec seems pretty clear about this implementation: http://www.w3.org/TR/SVG/struct.html#URIReference I found an example online of what should be a working XPointer reference within an svg document. Here is the Original. Here is the version I copied out: <?xml version="1.0" standalone="no"?> <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> <svg width="500" height="200" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <rect id="simpleRect" width="100px" height="75px"/> </defs> <use xlink:href="#simpleRect" x="50" y="50" style="fill:red"/> <use xlink:href="#xpointer(id('simpleRect'))" x="250" y="50" style="fill:yellow"/> </svg> This should display two rectangles... one red and one yellow. I tried rendering with Firefox 3.6 and Inkscape 0.47. No success. Only the Red rectangle shows. What am I missing? Thanks for any help you can offer

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  • How to structure class to support imported 3d model ?

    - by brainydexter
    Hello, I've written a C++ library that reads in this 3d model file (collada DAE). uptil now, I would output a list of triangles and handle each at rendering stage. But now, I need to attach some Bounding sphere information with the imported model. I need some advice on how should I organize this in code. Here are some specs of the 3D file format: - 3D model is represented as a Tree consisting of nodes - each node can contain other nodes, geometry information, transformation etc My requirements: - a bounding sphere associated with each node, thereby yielding a tree of bounding sphere hierarchy for the model itself. - actual vertex information What would be the recommended way to deal with this situation? Thanks

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  • Tag/Keyword based recommendation

    - by Hellnar
    Hello I am wondering what algorithm would be clever to use for a tag driven e-commerce enviroment: Each item has several tags. IE: Item name: "Metallica - Black Album CD", Tags: "metallica", "black-album", "rock", "music" Each user has several tags and friends(other users) bound to them. IE: Username: "testguy", Interests: "python", "rock", "metal", "computer-science" Friends: "testguy2", "testguy3" I need to generate recommendations to such users by checking their interest tags and generating recommendations in a sophisticated way. Ideas: A Hybrid recommendation algorithm can be used as each user has friends.(mixture of collaborative + context based recommendations). Maybe using user tags, similar users (peers) can be found to generate recommendations. Maybe directly matching tags between users and items via tags. Any suggestion is welcome. Any python based library is also welcome as I will be doing this experimental engine on python language.

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  • B-trees, databases, sequential inputs, and speed.

    - by IanC
    I know from experience that b-trees have awful performance when data is added to them sequentially (regardless of the direction). However, when data is added randomly, best performance is obtained. This is easy to demonstrate with the likes of an RB-Tree. Sequential writes cause a maximum number of tree balances to be performed. I know very few databases use binary trees, but rather used n-order balanced trees. I logically assume they suffer a similar fate to binary trees when it comes to sequential inputs. This sparked my curiosity. If this is so, then one could deduce that writing sequential IDs (such as in IDENTITY(1,1)) would cause multiple re-balances of the tree to occur. I have seen many posts argue against GUIDs as "these will cause random writes". I never use GUIDs, but it struck me that this "bad" point was in fact a good point. So I decided to test it. Here is my code: SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[T1]( [ID] [int] NOT NULL CONSTRAINT [T1_1] PRIMARY KEY CLUSTERED ([ID] ASC) ) GO CREATE TABLE [dbo].[T2]( [ID] [uniqueidentifier] NOT NULL CONSTRAINT [T2_1] PRIMARY KEY CLUSTERED ([ID] ASC) ) GO declare @i int, @t1 datetime, @t2 datetime, @t3 datetime, @c char(300) set @t1 = GETDATE() set @i = 1 while @i < 2000 begin insert into T2 values (NEWID(), @c) set @i = @i + 1 end set @t2 = GETDATE() WAITFOR delay '0:0:10' set @t3 = GETDATE() set @i = 1 while @i < 2000 begin insert into T1 values (@i, @c) set @i = @i + 1 end select DATEDIFF(ms, @t1, @t2) AS [Int], DATEDIFF(ms, @t3, getdate()) AS [GUID] drop table T1 drop table T2 Note that I am not subtracting any time for the creation of the GUID nor for the considerably extra size of the row. The results on my machine were as follows: Int: 17,340 ms GUID: 6,746 ms This means that in this test, random inserts of 16 bytes was almost 3 times faster than sequential inserts of 4 bytes. Would anyone like to comment on this? Ps. I get that this isn't a question. It's an invite to discussion, and that is relevant to learning optimum programming.

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  • Popup browser incompability

    - by Cornelis
    I have a popup with drop down menus on it. I've scaled it down and simplified it for test purposes, but it still doesn't work the way I want/it should. <!DOCTYPE html> <html> <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script type="text/javascript"> jQuery(document).ready(function(){ jQuery('.trigger').click(function(){ var picker = jQuery('.popup'); jQuery('<div></div>').css({ height: screen.height, width: screen.width, position: 'absolute', 'z-index': -1, top: picker.offset().top*-1, left: picker.offset().left*-1, border: '1px solid red' }).click(function(){ picker.trigger('focusout'); jQuery(this).hide(); }).prependTo(picker); picker.css('visibility', 'visible'); }); jQuery('.popup').live("focusout", function() { jQuery('.popup').fadeTo(500, 0.0, function() { jQuery('.popup').css('visibility', 'hidden'); jQuery('.popup').css('opacity', '1.0'); }); }); }); </script> </head> <body> <p> <input type=text class=trigger /> <div id=popup-div class=popup style="visibility: hidden; border: 1px solid red"> <select> <option>option1</option> </select> <p>Popup text</p> </div> </p> </body> When you click on the input field, a 'popup' appears, if you click outside the red border it fades away. If you click on the select option it shouldn't dissappear! However on this point, Chrome doesn't work the same as IE/FF/Opera/Safari, and makes the div dissappear. (Using Chrome 4.0.295.0) Does anybody knows a work-around for Chrome? Calling event.stopPropagation() on select elements did not work so far

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  • An Efficient data structure for Sorted List

    - by holydiver
    I want to save my objects according to a key in the attributes of my object in a sorted fashion. Later on I'll access these objects sequentially from max key to min key. I'll do some search tasks as well. I consider to use either AVL tree or RB Tree. As far as i know they are nearly equivalent in theory(Both have O(logn)). But in practice which one might be better in performance in my situation. And is there a better alternative than those, considering that I'll mostly do insert and sequentially access to the ds.

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  • How to unit test internals (organization) of a data structure?

    - by Herms
    I've started working on a little ruby project that will have sample implementations of a number of different data structures and algorithms. Right now it's just for me to refresh on stuff I haven't done for a while, but I'm hoping to have it set up kind of like Ruby Koans, with a bunch of unit tests written for the data structures but the implementations empty (with full implementations in another branch). It could then be used as a nice learning tool or code kata. However, I'm having trouble coming up with a good way to write the tests. I can't just test the public behavior as that won't necessarily tell me about the implementation, and that's kind of important here. For example, the public interfaces of a normal BST and a Red-Black tree would be the same, but the RB Tree has very specific data organization requirements. How would I test that?

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  • WPF calls not working during long method processing

    - by Colin Rouse
    Hi, The following method does not apply the wpf changes (background = red) until the 2nd method (DoWork) exits: private void change() { Background = Brushes.Red; Dispatcher.BeginInvoke((Action) DoWork); } DoWork() takes several seconds to run and I don't really want to put it into a thread, as this code will be used in several places and will probably interact will the Dispatcher thread at various intervals. I've tried calling the Invalidate...() methods, but to no avail. The BeginInvoke() was added to see if the delay would allow the background change to be applied before the logic was called. Typically, the logic would be part of this method. Btw, most of the logic is performed on a different thread and shouldn't block the Dispatcher thread?! Can someone please help? Thanks

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  • Why does IE prompt a security warning when viewing an XML file?

    - by Tav
    Opening an XML file in Internet explorer gives a security warning. IE has a nice collapsible tree view for viewing XML, but it's disabled by default and you get this scary error message about a potential security hole. http://www.leonmeijer.nl/archive/2008/04/27/106.aspx But why? How can simply viewing an XML file (not running any embedded macros in it or anything) possibly be a security hole? Sure, I get that running XSLT could potentially do some bad stuff, but we're not talking about executing anything. We're talking about viewing. Why can't IE simply display the XML file as text (plus with the collapsible tree viewer)? So why did they label this as a security hole? Can someone describe how simply viewing an XML document could be used as an attack document?

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  • webOS style view switching on iPhone app

    - by Taylor Satula
    Hello, I have been working with a iPhone app that I would like to have switch views like the Palm Pre does for multitasking. I know the usual way of switching views by using the black bar at the bottom of the app but the app I am working on does not lend itself to having a big black bar in the way (see attached picture #1). I guess my question is, how do I shrink the current view (Current Location window) and show other views on the sides? (see attached picture #2) Then be able to swipe left and right to view other views. I have no idea how to do this and would be eternally grateful if someone could help me out with this. http://www.threepixeldrift.com/images/deep-storage/webOScardapp1.jpg http://www.threepixeldrift.com/images/deep-storage/webOScardapp2.jpg

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  • Windows splash screen using GDI+

    - by Luther
    The eventual aim of this is to have a splash screen in windows that uses transparency but that's not what I'm stuck on at the moment. In order to create a transparent window, I'm first trying to composite the splash screen and text on an off screen buffer using GDI+. At the moment I'm just trying to composite the buffer and display it in response to a 'WM_PAINT' message. This isn't working out at the moment; all I see is a black window. I imagine I've misunderstood something with regards to setting up render targets in GDI+ and then rendering them (I'm trying to render the screen using straight forward GDI blit) Anyway, here's the code so far: //my window initialisation code void MyWindow::create_hwnd(HINSTANCE instance, const SIZE &dim) { DWORD ex_style = WS_EX_LAYERED ; //eventually I'll be making use of this layerd flag m_hwnd = CreateWindowEx( ex_style, szFloatingWindowClass , L"", WS_POPUP , 0, 0, dim.cx, dim.cy, null, null, instance, null); SetWindowLongPtr(m_hwnd ,0, (__int3264)(LONG_PTR)this); m_display_dc = GetDC(NULL); //This was sanity check test code - just loading a standard HBITMAP and displaying it in WM_PAINT. It worked fine //HANDLE handle= LoadImage(NULL , L"c:\\test_image2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE); m_gdip_offscreen_bm = new Gdiplus::Bitmap(dim.cx, dim.cy); m_gdi_dc = Gdiplus::Graphics::FromImage(m_gdip_offscreen_bm);//new Gdiplus::Graphics(m_splash_dc );//window_dc ;m_splash_dc //this draws the conents of my splash screen - this works if I create a GDI+ context for the window, rather than for an offscreen bitmap. //For all I know, it might actually be working but when I try to display the contents on screen, it shows a black image draw_all(); //this is just to show that drawing something simple on the offscreen bit map seems to have no effect Gdiplus::Pen pen(Gdiplus::Color(255, 0, 0, 255)); m_gdi_dc->DrawLine(&pen, 0,0,100,100); DWORD last_error = GetLastError(); //returns '0' at this stage } And here's the snipit that handles the WM_PAINT message: ---8<----------------------- //Paint message snippit case WM_PAINT: { BITMAP bm; PAINTSTRUCT ps; HDC hdc = BeginPaint(vg->m_hwnd, &ps); //get the HWNDs DC HDC hdcMem = vg->m_gdi_dc->GetHDC(); //get the HDC from our offscreen GDI+ object unsigned int width = vg->m_gdip_offscreen_bm->GetWidth(); //width and height seem fine at this point unsigned int height = vg->m_gdip_offscreen_bm->GetHeight(); BitBlt(hdc, 0, 0, width, height, hdcMem, 0, 0, SRCCOPY); //this blits a black rectangle DWORD last_error = GetLastError(); //this was '0' vg->m_gdi_dc->ReleaseHDC(hdcMem); EndPaint(vg->m_hwnd, &ps); //end paint return 1; } ---8<----------------------- My apologies for the long post. Does anybody know what I'm not quite understanding regarding how you write to an offscreen buffer using GDI+ (or GDI for that matter)and then display this on screen? Thank you for reading.

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  • Learning Algorithms and Data Structures Fundamentals

    - by valya
    Can you recommend me a book or (better!) a site with many hard problems and exercises about data structures? I'm already answering project Euler questions, but these questions are about interesting, but uncommon algorithms. I hardly used even a simple tree. Maybe there is a site with exercises like: hey, you need to calculate this: ... . Do it using a tree. Now do it using a zipper. Upload your C (Haskell, Lisp, even Pascal or Fortress go) solution. Oh, your solution is so slow! Self-education is very hard then you trying to learn very common, fundamental things. How can I help myself with them without attending to courses or whatever?

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  • System.Drawing - bad text rendering using DrawString on top of transparent pixels.

    - by mackenir
    When rendering text into a bitmap, I find that text looks very bad when rendered on top of an area with non-opaque alpha. The problem is progressively worse as the underlying pixels become more transparent. If I had to guess I'd say that when underlying pixels are transparent, the text renderer draws any anti-aliased 'gray' pixels as solid black. Here are some screenshots: Text drawn on top of transparent pixels: Text drawn on top of semi-transparent pixels: Text drawn on opaque pixels: Here is the code used to render the text: g.SmoothingMode = SmoothingMode.HighQuality; g.DrawString("Press the spacebar", Font, Brushes.Black, textLeft, textTop);

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  • jQuery fadeIn fadeOut pause on hover

    - by theDawckta
    I have a little jQuery snippet that will fadeIn and fadeOut a group of divs over a select interval. I now need to pause this fadeIn fadeOut on hover, then resume on mouse out. Any help is appreciated. Here is the relevant code. The following is what is located in my body <div class="gcRotate"> <div class="gcRotateContent"> <div style="border: solid 2px black; text-align: center; width: 150px;"> This is first content <img src="http://pix.motivatedphotos.com/2008/6/16/633492359109161542-Skills.jpg" alt="Dude" /> </div> </div> <div class="gcRotateContent"> <div style="border: solid 2px black; text-align: center; width: 150px"> This is second content <img src="http://www.funnycorner.net/funny-pictures/5010/cheezburger-locats.jpg" alt="Dude" /> </div> </div> <div class="gcRotateContent"> <div style="border: solid 2px black; text-align: center; width: 150px"> This is third content <img src="http://icanhascheezburger.files.wordpress.com/2007/06/business.jpg" alt="Dude" /> </div> </div> </div> <div> This shouldn't move. </div> <script type="text/javascript"> function fadeContent() { $(".gcRotate .gcRotateContent:hidden:first").fadeIn(500).delay(2000).fadeOut(500, function() { $(this).appendTo($(this).parent()); fadeContent(); }); } $(".gcRotate").height(0); $(".gcRotateContent").each( function() { if ($(".gcRotate").height() < $(this).height()) { $(".gcRotate").height($(this).height()); } } ); $(".gcRotateContent").each(function() { $(this).css("display", "none") }); fadeContent(); </script>

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  • how do I put a variable inside an attribute for an href tag

    - by Ido
    Hi I'm new to scripting Trying to change the css acording to a url variable, using jqURL plugin. for some reason this does not work for me: $(function(){ var n= $.jqURL.qs(); alert(n) $("link[rel=stylesheet]").attr({href : 'n + ".css"'}); }); the alert is there for debug, and works well, so it is a matter of how i put the var in the attribute. this, for example, works fine: if(n == 'red') { $("link[rel=stylesheet]").attr({href : "red.css"});} help please

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