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  • How to draw a transparent stroke (or anyway clear part of an image) on the iPhone

    - by devguy
    I have a small app that allows the user to draw on the screen with the finger. Yes, nothing original, but it's part of something larger :) I have a UIImageView where the user draws, by creating a CGContextRef and the various CG draw functions. I primarily draw strokes/lines with the function CGContextAddLineToPoint Now the problem is this: the user can draw lines of various colors. I want to give him the ability to use a "rubber" tool to delete some part of the image drawn so far, with the finger. I initially did this by using a white color for the stroke (set with the CGContextSetRGBStrokeColor function) but it did't work out...because I discovered later that the UIImage on the UIImageView was actually with transparent background, not white...so I would end up with a transparent image with white lines on it! Is there anyway to set a "transparent" stroke color...or is there any other way to clear the content of the CGContextRef under the user's finger, when he moves it? Thanks

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  • How to scale an Image in ImageView to keep the aspect ratio

    - by michael
    Hi, In android, I defined an ImageView's layoutWidth to be 'fill_parent' (which takes up the full width of the phone). My question is if the Image i put to ImageView is bigger than the layoutWidth, android will scale it, right? But what about the height? when android scale it, will it keeps the aspect ratio? What I find out is, there is some 'white space' at the top/bottom of the ImageView when android scales an image which is bigger than the ImageView. Is that true? If yes, how can I eliminate that white spaces? Thank you.

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  • CSS Rollovers: how to main "hit area" size when hidden image is larger than anchor area

    - by nukefusion
    I have a small problem and I don't think what I want to do can be achieved with just pure CSS, but I figured I'd ask anyway. Basically, I have one DIV which contains a hyperlinked element that is smaller in size to it's parent DIV. So in effect I have a square within a square with the inner square being the "hit area". When I mouse over this inner square I want the background of the outer square to change. I know it's not possible to change the parent DIV's background on a:hover, but I figured I could give the illusion of it happening by nesting a hidden image inside the anchor. This works great until I want to "roll off". The problem is that I want the image to disappear when I leave the area of the anchor tag, not the larger hidden image. Is this possible? For the benefit of everyone I've provided an example to demonstrate what I mean: <!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 content="text/html; charset=utf-8" http-equiv="Content-Type" /> <title>Test Rollover</title> <link href="main.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="d1"> <a href="#nogo"> <b id="b1"></b> <b id="b2"></b> </a> </div> </body> And the css: #b1 { width: 200px; height: 200px; top: 100px; left: 100px; background-color:aqua; position: absolute; } #b2 { width: 400px; height: 400px; background-color:lime; position: absolute; display: none; } #d1 { width: 400px; height: 400px; background-color:fuchsia; position: relative; } #d1 a:hover #b2 { display: block; } In this example I want the green outer square to disappear when I leave the bounds of the hidden inner blue square.

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  • Windows Sharepoint Service (WSS) 3.0 search Issue

    - by dewacorp.alliances
    Based on this http://servergrrl.blogspot.com/2008/02/how-to-use-wss-30-to-search-more-than.html blog, I've created a domain account for testing and sets the permission at the side level as well as Document Library to allow specific user (DOMAIN/TestUser1) allow accessing this folder. Now, it's interesting that the user can see the document by drilling though BUT it won't be able to search and the document couldn't find it. But if I tested with the site owner (both primary and secondary), it works nicely. What did I do wrong then? It must be related on permission but I cound't work out what it is. BTW ... I am using WSS not MOSS 2007. Thanks

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  • Ldap search query with parameters

    - by djerry
    Hey guys, I'm using a ldap server to store phonerecords. I want to select a record with a specific telnumber. So this is what I'm doing: LdapSearchResults lsc = _conn.Search(dnForPhonebook, 1, "(&(objectClass=*)(uid=" + id + "))", null, false); I'm using novell library for ldap commands. The options i need to give in for the Search command are the dn to the node "phonebook" (string), scope (int), filter (string), attrrs (string[]) and typesOnly (bool). As you can see, for the filter, i'm pasting the parameter as string in de stringfilter. I was wondering, does ldap have the same way of work as mysql or sql server, which can work with paramaters? Thanks in advance.

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  • Posting an image and textual based data to a wcf service

    - by James Hay
    I have a requirement to write a web service that allows me to post an image to a server along with some additional information about that image. I'm completely new to developing web services (normally client side dev) so I'm a little stumped as to what I need to look into and try. How do you post binary data and plain text into a servic? What RequestFormat should I use? It looks like my options are xml or json. Can I use either of these? Bit of a waffly question but I just need some direction rather than a solution as I can't seem to find much online.

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  • Zoom image using delphi

    - by Himadri
    Hello All, I am working with delphi. I have TImage, to which I assign a bitmap. imgmain.Picture.Bitmap := bmpMain; imgmain.Picture.Bitmap.PixelFormat := pf24bit; imgmain is object of TImage and bmpMain is object of TBitmap I want to zoom my image. I have one trackbar on my form and as I click on trackbar the image should get zoom. What should I do? Thank You.

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  • jQuery Ajax load images problem

    - by jackysee
    I have a code that would call $.load() to get an HTML fragment. In the fragment there will be a list of images and a script that would do some calculation based on the list size. The fragment looks like <div> <ul> <li><img .../></li> <li><img .../></li> ... </ul> </div> <script> //... script to do calculation on the list width </script> Originally, I use css's max-width to ensure that the image would not exceed 180px. But as IE has no max-width, I use the expression hack. However, it seems when the image are first load, the script cannot get a correct width of image list. Seems like the script load earlier than the CSS expression. If it is a new page, I can certainly call $(window).load() to ensure all the images are loaded. But what can I do in an ajax html fragment request?

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  • CSS background image inconsistency in IE6 and IE7

    - by The Machine
    I have a span that is generated through javascript, with its css class as follows: .class1{ width:25px; height:25px; background-image: url(pic.png); background-repeat:no-repeat; background-position: center; cursor:pointer; margin-left:10px; } The problem is on, the html page, i can see the pointer -cursor, but not the background image,over the span, in IE7. In IE6, both get shown , no problems.

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  • Draw a Image on FullScreen mode Android

    - by Marcos Vasconcelos
    Hi, I already know how to get my Activity as fullscreen on Android, now I need to draw a Image in this screen. This is my XML layout. <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ImageView android:id="@+id/image01" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout> This image is dynamic generated and drawed in the ImageView. This is my code on my Activity. public void onCreate(Bundle savedInstance) { super.onCreate(savedInstance); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); } But when running, the Activity is FullScreen, but the ImageView is adjusted in the center. What's wrong?

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  • Background-image toggle using jquery

    - by Jon
    Hi all, bit of a jquery rookie here trying to get something to work. Basically I have a div with a class "nav" and inside that div is a nav list. I want to change the background-image of "nav" when hovering over an item in the navlist, so I made this unsuccesful effort: enter code here $(function(){ $("li#hover-first").mouseover(function(){ $("div.nav").removeClass("nav").addClass("navbg"); .mouseout(function(){$("div.nav").removeClass("navbg").addClass("nav"); }); So the idea is, once the first li item is hovered over, the div with classname "nav" has it's class removed and has "navbg" added (which has the alternate background image). Obviously this isn't working, so any help would be greatly appreciated...thanks.

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  • Performance - User defined query / filter to search data

    - by Cagatay Kalan
    What is the best way to design a system where users can create their own criterias to search data ? By "design" i mean, data storage, data access layer and search structure. We will actually refactor an existing application which is written in C# and ASP .NET and we don't want to change the infrastructure. Our main issue is performance and we use MSSQL and DevExpress to build queries. Some queries run in 4-5 minutes and all the columns included in the queries have indexes. When i check queries, i see that DevExpress builds too many "exists" clauses and i'm not happy with that because i have doubts that some of these queries skip some indexes. What may be the alternatives to DevExpress? NHibernate or Entity Framework? Can we build dynamic criteria system and store these to database in both of them ? And also do we need any alternative storage like a lucene index or OLAP database?

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  • What's the best way to convert a .eps (CMYK) to a .jpg (RGB) with Image Magick

    - by Slinky
    Hi All, I have a bunch of .eps files (CMYK) that I need to convert to .jpg (RGB) files. The following command sometimes gives me under or over saturated .jpg images, when compared to the source EPS file: $cmd = "convert -density 300 -quality 100% -colorspace RGB ".$epsURL." -flatten -strip ".$convertedURL; Is there a smarter way to do this such that the converted image will have the same qualities as the source EPS file? Here is an example of the source file info: Image: rejm.eps Format: PS (PostScript) Class: DirectClass Geometry: 537x471 Base geometry: 1074x941 Type: ColorSeparation Endianess: Undefined Colorspace: CMYK Channel depth: Cyan: 8-bit Magenta: 8-bit Yellow: 8-bit Black: 8-bit Channel statistics: Cyan: Min: 0 (0) Max: 255 (1) Mean: 161.913 (0.634955) Standard deviation: 72.8257 (0.285591) Magenta: Min: 0 (0) Max: 255 (1) Mean: 184.261 (0.722591) Standard deviation: 75.7933 (0.297229) Yellow: Min: 0 (0) Max: 255 (1) Mean: 70.6607 (0.277101) Standard deviation: 39.8677 (0.156344) Black: Min: 0 (0) Max: 195 (0.764706) Mean: 34.4382 (0.135052) Standard deviation: 38.1863 (0.14975) Total ink density: 292% Colors: 210489 Rendering intent: Undefined Resolution: 28.35x28.35 Units: PixelsPerCentimeter Filesize: 997.727kb Interlace: None Background color: white Border color: #DFDFDFDFDFDF Matte color: grey74 Page geometry: 537x471+0+0 Dispose: Undefined Iterations: 0 Compression: Undefined Orientation: Undefined Signature: 8ea00688cb5ae496812125e8a5aea40b0f0e69c9b49b2dc4eb028b22f76f2964 Profile-iptc: 19738 bytes Thanks

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  • extracting a quadrilateral image to a rectangle

    - by Will
    In the image below, the sign on the side of the van is not face-on to the camera. I want to calculate, as best I can with the pixels I have, what it'd look like face on. I imagine that this is some kind of loop through the x and y axis doing a Bresenham's line on both dimensions at once with some kind of mixing when pixels in the source image overlap - some sub-pixel mixing of some sort? What approaches are there, and how do you mix the pixels? Is there a standard approach for this?

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  • YUI Autocomplete: search after pasting?

    - by rassie
    I'm using an auto-complete widget from YUI to implement live search as in the examples. However, it works fine when search text is typed in, but fails to work when the text is pasted into the field. Which would be the proper way to initiate an autocompletion on paste? Haven't found anything for that in the documentation... EDIT: Pasting is not Ctrl-V, it's usually "Paste" from the context-menu. YUI does react to a keypress, but doesn't if anything is pasted by the mouse.

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  • How to display an image when aAsynch post back is happening

    - by Nasser Hajloo
    I have an Ajaxable application which has some UpdateProgress for each postBack events. everything is good and working great. I want to display another Indicator in my SiteMapPath bar which shows a post back is happening no matter what. For example when user clicks on a button an UpdateProgress display an Indicator Image in central part of application. I want to display another image ( for every postbacks not only for one) in top of application toolbar. Currently I use a simple Flag out ther and I want to use an indicator instead of that flag when ever a postback happens Thank you in advance

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  • Creating avatar from uploaded image

    - by mamu
    We are using asp.net with .net 4.0 We want to allow users to upload any image and we want to create tiny avatar for uploaded image? What is the best way to convert uploaded images for avatar? We want to keep the same height width ratio if we can convert gif, bmp, jpg, png to one standard format it would be greate. Which could be the best format to convert it to? i think converting gif would be best option. am i correct? any open source option i can look at

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