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  • Changing RGB color image to Grayscale image using Objective C

    - by user567167
    I was developing a application that changes color image to gray image. However, some how the picture comes out wrong. I dont know what is wrong with the code. maybe the parameter that i put in is wrong please help. UIImage *c = [UIImage imageNamed:@"downRed.png"]; CGImageRef cRef = CGImageRetain(c.CGImage); NSData* pixelData = (NSData*) CGDataProviderCopyData(CGImageGetDataProvider(cRef)); size_t w = CGImageGetWidth(cRef); size_t h = CGImageGetHeight(cRef); unsigned char* pixelBytes = (unsigned char *)[pixelData bytes]; unsigned char* greyPixelData = (unsigned char*) malloc(w*h); for (int y = 0; y < h; y++) { for(int x = 0; x < w; x++){ int iter = 4*(w*y+x); int red = pixe lBytes[iter]; int green = pixelBytes[iter+1]; int blue = pixelBytes[iter+2]; greyPixelData[w*y+x] = (unsigned char)(red*0.3 + green*0.59+ blue*0.11); int value = greyPixelData[w*y+x]; } } CFDataRef imgData = CFDataCreate(NULL, greyPixelData, w*h); CGDataProviderRef imgDataProvider = CGDataProviderCreateWithCFData(imgData); size_t width = CGImageGetWidth(cRef); size_t height = CGImageGetHeight(cRef); size_t bitsPerComponent = 8; size_t bitsPerPixel = 8; size_t bytesPerRow = CGImageGetWidth(cRef); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray(); CGBitmapInfo info = kCGImageAlphaNone; CGFloat *decode = NULL; BOOL shouldInteroplate = NO; CGColorRenderingIntent intent = kCGRenderingIntentDefault; CGDataProviderRelease(imgDataProvider); CGImageRef throughCGImage = CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpace, info, imgDataProvider, decode, shouldInteroplate, intent); UIImage* newImage = [UIImage imageWithCGImage:throughCGImage]; CGImageRelease(throughCGImage); newImageView.image = newImage;

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  • How to get selected text from a webpage?

    - by user128647
    I need to retrieve only selected portion of a webpage (user open a webpage in web-browser control, then he/she would select some portion of a webpage, i just need only those selected portion/text) in vb.net in visual basic language. How to do ? i am using microsoft visual studio 2008 Language: Visual Basic FrameWork: vb.net 3.5

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  • UITableView section footer multiple UIButtons

    - by joec
    In the section footer of my UITableView, i have one UIButton, this button is 320 pixels wide (i.e. takes up full width of view). I would like two buttons in the section footer, but when i try and add another button, Interface Builder just puts it on top of the existing button. If i try to change the size in the inspector from 320 to say 50 pixels, it always reverts to 320. What am i doing wrong? Thanks.

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  • jQuery + Dialog Form Validation

    - by Panther24
    Hi, I have a jQuery Dialog form and on submit I'm trying to validate the fields. I'm using http://docs.jquery.com/Plugins/Validation to validate. In this I'm facing an issue, the validate function is not being called. I'm posting some snippet of my code $("#register-dialog-form").dialog({ autoOpen: false, height: 350, width: 450, modal: true, buttons: { 'Register': function() { $("#registerFrm").validate({ rules: { accountid: "required", name: { required: true, minlength: 5 }, username: { required: true, minlength: 5 }, password: { required: true, minlength: 5 } }, messages: { firstname: "Please enter your firstname", accountid: "Please enter the lastname", name: "Please enter a user friendly name", username: { required: "Please enter a username", minlength: jQuery.format("Enter at least {0} characters") }, password: { required: "Please provide a password", minlength: jQuery.format("Password must be at least {0} characters long") } } }); //****************** //TODO: Need to submit my form here //****************** $(this).dialog('close'); }, Cancel: function() { $(this).dialog('close'); } }, close: function() { //$('registerFrm').clearForm(); } }); Can someone please tell me what I'm doing wrong here. I've also tried to put the validation into $(document).ready(function() {}, but with no success. Here is the html code <div id="register-dialog-form" title="Register Account - Master" align="center" style="display: none"> <s:form name="registerFrm" id="registerFrm" action="registermaster" method="POST"> <table width="90%" border="0" class="ui-widget"> <tr> <td> <s:textfield label="Account Id" name="accountid" id="accountid" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:textfield label="Name" name="name" id="name" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:textfield label="Username" name="username" id="username" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> <tr> <td> <s:password label="Password" name="password" id="password" cssClass="text ui-widget-content ui-corner-all" /> </td> </tr> </table> </s:form> </div><!--End of RegisterAcc form-->

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  • Navbar Menu Trouble shoot

    - by Nabeel M
    So I wanted to create the fixed nav bar on top of the page. Instead of creating nav bar with ordered list, I used the following approach: <header> <div class="nav"> <img src="images/logo_ab.png" alt="AurinBioTech Logo"/> <a href="index.html">Home</a> <a href="#">About</a> <a href="#">Team</a> <a href="#">Science</a> <a href="#">Need</a> <a href="#">Pipeline</a> <a href="#">Contact</a> </div> </header> CSS: header .nav { margin-top:100px; width:100%; height:10%; text-align:center; padding-top:2%; margin:0 auto; position:fixed; top:0; } header .nav a { font-size: 2em; padding-left: 15px; padding-right: 15px; color:rgb(1, 1, 1); text-decoration: none; font-family: 'Bebas'; } header .nav a:hover { color:white; background-color: #404040; border-radius:5px; padding:0 auto; } header .nav a:active{ background-color: #404040; border-radius:5px; text-decoration:overline; } header .nav img { width:260px; height:65px; padding-right:4em; } The reason I used this approach is because I wanted to use logo image next to the nav bar so it would align properly in the same line. Now the problem is that I need to add sub-menus under Science and Pipeline heading. Since I didn't use UL or LI, how can I add sub-menus under those heading. OR, can you tell me any other way to create a NAV bar that shows the logo as well. so it would be LOGO and MENUS on the same line. Great thanks in advance.

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  • How to do an if statement on a function in PHP?

    - by Bruce
    I just realized that you can't just use an if statement on a function, for example this doesn't work: function sayHello() { echo "Hello World"; } if(sayHello()) echo "Function Worked"; else echo "Function Failed"; I also saw that a function can't be put as the value of a variable. So how can I do an if statement to check if a function has executed properly and display it to the browser?

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  • Pass a global javascript array value into a HTML Tag

    - by tonsils
    Hi, Just wondering if it's possible to pass a global javascript array value into a html tag, specifically inside a img (title) tag? Basically want to know if I can do this: <img src="_info.gif" height="26" width="37" title=myArray[5]/> If so, how and if not, can people possibly provide other suggestions. Thanks

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  • Countdown timer?

    - by Khou
    How do you make a Countdown timer? When the user loads the page, clock starts counting down, it reaches time, it redirects browser to a new page. Found this, it was not too useful. http://encosia.com/2007/07/25/display-data-updates-in-real-time-with-ajax/

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  • SVG via dynamic XML+XSL

    - by Daniel
    This is a bit of a vague notion which I have been running over in my head, and which I am very curious if there is an elegant method of solving. Perhaps it should be taken as a thought experiment. Imagine you have an XML schema with a corresponding XSL transform, which renders the XML as SVG in the browser. The XSL generates SVG with appropriate Javascript handlers that, ultimately, implement editing-like functionality such that properties of the objects or their locations on the SVG canvas can be edited by the user. For instance, an element can be dragged from one location to another. Now, this isn't particularly difficult - the drag/drop example is simply a matter of changing the (x,y) coordinates of the SVG object, or a resize operation would be a simple matter of changing its width or height. But is there an elegant way to have Javascript work on the DOM of the source XML document instead of the rendered SVG? Why, you ask? Well, imagine you have very complex XSL transforms, where the modification of one property results in complex changes to the SVG. You want to maintain simplicity in your Javascript code, but also a simple way to persist the modified XML back to the server. Some possibilities of how this may function: After modification of the source DOM, simply re-run the XSL transform and replace the original. Downside: brute force, potentially expensive operation. Create id/class naming conventions in the source and target XML/SVG so elements can be related back to each other, and do an XSL transform on only a subset of the new DOM. In other words, modify temporary DOM, apply XSL to it, remove changed elements from SVG, and insert the new one. Downside: May not be possible to apply XSL to temporary in-browser DOMs(?). Also, perhaps a bit convoluted or ugly to maintain. I think that it may be possible to come up with a framework that handles the second scenario, but the challenge would be making it lightweight and not heavily tied to the actual XML schema. Any ideas or other possibilities? Or is there maybe an existing method of doing this which I'm not aware of? UPDATE: To clarify, as I mentioned in a comment below, this aids in separating the draw code from the edit code. For a more concrete example of how this is useful, imagine an element which determines how it is drawn dependent on the value of a property of an adjacent element. It's better to condense that logic directly in the draw code instead of also duplicating it in the edit code.

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  • Subdomain forwarding using .htaccess

    - by RJ
    I want to redirect a praticular subdomain to the main domain http(s)://dl.example.com/par1/par2 to http(s)://www.example.com/par1/par2 How to achieve the above using .htaccess Why i want to do this: Whenever any user download a file from my server, if the file is huge , then user cannot do any other operation until the file is downloaded completely...so the solution that i have thought is to forward the download request through subdomain so that the browser may continue with rest of the operation. Thanks

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  • ideas: per-file authentication in order to download

    - by suIIIha
    i would love to use mod_xsendfile but i live in a shared environment which does not provide such a module. processing large files such as videos through a server-side script and sending it to the browser that way seems to be unacceptable in my case, so i am looking for a way to enable per-file authentication in such a way that is not going to consume resources much. nobody shall know what the actual path is to the file they are downloading. please suggest how to do that.

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  • How to call popup window in asp.net mvc?

    - by Renu123
    hello i have js file for the popup window. i have used in asp.net but its not working in asp.net mvc can anyone tell me how to use this code in mvc function openUserSavedListDetailsPopUp(id) { dhtmlmodal.open('UserInfo', 'iframe', 'UserSavedListDetails.aspx?listId=' + id, '', 'width=710px,height=150px,center=1,resize=0,scrolling=0') } on page: <a href="#" onclick='openUserSavedListDetailsPopUp(<%# DataBinder.Eval(Container.DataItem, "OrderId")%>)' > hello </a> thank you in advance

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  • Setting background-image with javascript

    - by Mattoe3k
    In chrome, safari, and opera setting the background image to an absolute reference such as: "/images/image.png" changes it to "http://sitepath/images/image.png". It does not do this in firefox. Is there any way to avoid this behavior, or is it written into the browser's javascript engine? Using jquery to set the background-image also does this problem. The problem is that I am posting the HTML to a php script that needs the urls in this specific format. I know that setting the image path relative fixes this, but I can't do that. The only other alternative would be to use a regexp. to convert the urls. Thanks. Test this in firefox, and chrome / webkit browser: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> </head> <body> <div style="height:400px;width:400px;background-image:url(/images/images/logo.gif);"> </div> <br /> <br /> <div id="test" style="height:400px;width:400px;"> </div> <script type="text/javascript" src="/javascripts/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("#test").css('background-image',"url(/images/images/logo.gif)"); alert(document.getElementById('test').style.backgroundImage); }); </script> </body> </html>

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  • ASP.NET Repeater Control Not Working in FireFox

    - by Robert Hyland
    everyone: I have an ASP.NET Application that uses a Repeater control to display a thumbnail gallery. When the user mouses over one of the thumbnails, the main image will present that thumbnail. It uses a Repeater control in a UserControl like this: <asp:Image ID="pictureImage" runat="server" Visible="true" Width="200px" /> <asp:Repeater ID="rpProductImages" runat="server" Visible="false"> <ItemTemplate> <div> <div style="float: left" id="smallImage" runat="server"> <div class="smallAltImage" onmouseover="showImage();" style="border: 1px solid #999999; margin: 5px 5px 5px 4px; width: 45px; height: 45px; background-position: center; background-repeat: no-repeat; background-image: url('<%#ResolveClientUrl(productImagesPath)%><%# String.Format("{0}", DataBinder.Eval(Container.DataItem, "ImageName")) %>');"> </div> <asp:Label ID="lblImageName" runat="server" Visible="false"><%# Eval("ImageName")%></asp:Label> </div> </div> </ItemTemplate> </asp:Repeater> Then, in a javascript file, this: function showImage(){ // Get thumbnail path. var img = (this.style.backgroundImage).substring(4, (this.style.backgroundImage).length - 1); $('#ctl00_ContentPlaceHolder1_ProductDetails1_pictureImage').attr('src', img); } It works fine in IE9, displaying the fully-qualified path for the image. In FireFox8, however, the img src looks like this: ""ProductImages/K42JY_500.jpg"" ... with two-sets of quotes! I think that the Repeater control is the central cause of the problem but I Googled and Googled again and could not find anyone that has experienced this similar situation! In fact, I'll PayPal anyone who can help me solve this with $50.00 (can't you tell I'm in the XMAS spirit, here?!) Any help is appreciated and "Thank You" in advance!

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  • Force users to recache url

    - by Ni Le
    I had a setting in my domain controller to redirect my domain that another domain. Example http://mysite.com redirected to http://othersite.com I removed the redirect about one week ago, but some users still seeing the redirect http://othersite.com rather than http://mysite.com. Clearing the browser cache fixes the problem. Is there are way I can force users to update their cache when they go to my site?

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  • post object to wcf rest service

    - by gleasonomicon
    I'm using the WCF Rest service application project template in visual studio. I'm just learning about REST, and I was wondering how I would post a SampleItem object to the following method: [WebInvoke(UriTemplate = "", Method = "POST")] public SampleItem Create(SampleItem instance) { // TODO: Add the new instance of SampleItem to the collection throw new NotImplementedException(); } I get the general concepts of gets for the purposes of grabbing data, but I'm not sure how I would post the object in code (or just through a browser for testing) to the service.

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  • need help writing an emacs function

    - by murtaza52
    I want to write an emacs function that does the following - 1) Start a new shell named "abc". 2) Change the dir "/opt/abc" 3) In the dir run a shell command "python abc.py" I have written the following fucntion - (defun abc-server () (interactive) (shell-command "cd /opt/abc/") (shell-command "python abc.py")) The problem with the above - 1) It doesnt start a new shell 2) It doesnt change the dir. 3) When the cmd executes, it opens a browser window, which completely blocks any usage of emacs.

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  • How to determine the current view bounds in split view of Ipad App?

    - by Mahesh
    Hello friends, I have tried following code to determine current view bounds in shouldAutoRotate.. fn UIViewController *temp1 = [appDelegate.splitViewController.viewControllers objectAtIndex:1]; float screenwidth = temp1.view.bounds.size.width; float screenheight = temp1.view.bounds.size.height; bt actually when u rotate from one mode to another, it provides the bound values of old one insted the fresh bound values..? Any one know that how to achieve it?

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  • Why is my web page left-aligned on iPad?

    - by Andrew
    I recently built a site and centered it using margin: 0 auto. I also wrapped elements in a .wrapper class with a width set to 960px and then had the parent element extend across the whole browser. When I view the Brands screen on an iPad though, the site is left-aligned and does not extend across the whole window. Any thoughts to why this might be happening, and how to correct it? See below for a screenshot:

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  • Watin: Clicking on a element works in debug mode but not otherwise

    - by Vadi
    I've below code which basically clicks on a Click event present a table, browser.Frame("f").Element("Table1").Click(); it works properly when during debug mode (like if i put a break point and execute it). But, it does not work when i run it in a flow, I've used SimpleTimer to wait until Settings.WaitForCompleteTimeOut, but no use. Any help?

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  • access DLLs with java script

    - by Caio Garcia
    I need to read the serial port as an input for a web based applicaton. I know that the browser can't do it, but if I build an DLL and send it to my client, can I access this DLL and read de serial port with an java script or i will need something like ActiveX?

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