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  • How to secure images with Rails?

    - by NotDan
    I have a gallery in my rails app that needs to only allow certain images to be shown to specific, logged in users. I am using Paperclip for image processing now, but it saves all images in a public folder available to anyone. Note that I don't have to use Paperclip if there is a better way, and I already have the login system in place. I just need a way to place the images in a non-public location, but still be able to serve them as needed. Is it possible to only allow these images to be served to authenticated users?

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  • Dynamically generating a file with javascript?

    - by gct
    I'm working on a web app for my company that will let us do some image tagging stuff, and I'd like to be able to generates results in the form of a CSV file. I can do this easily enough by dumping the CSV data to a div or something on the page and having the user copy it out. I'd rather have them hit the a generate button and have a CSV file downloaded as though they clicked on a link to the result, so they can more easily just save the file somewhere convenient. Is it possible to simulate this kind of thing with javascript? I basically want to dynamically generate the file and then let them download it, client side.

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  • App like default photo browser in iphone ?

    - by goeff27
    Hi All i am developing a app which contains feature like default photo browser in iphone. I done some what similar to that. but after loading some(near about 10-15) images from remote server,i am receiving memory warning.My requirement is loading image one by one. For this, on scroll view i am putting an images and increasing the contentSize of scroll view. it will work fine. but due to memory warning app quite. Guys, any have any idea to approach for this feature which work similar to photo app without problem? thanks in advance .

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  • ASP.NET Website or Web service?

    - by fireBand
    Hi, I am trying to implement a service to download a image file. The code does nothing but upload a file to the response with each client request. There are no SOAP messages involved but I am planning to implement it as ASP.NET web service. It can also be implement as ASP.NET website but since it has no view (forms, html etc) I planned to implement a web-service. Is this a better approach? Does ASP.NET Website offer better performance that a Web-service? Which one would be better is this situation? Thanks in advance.

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  • MFMessageComposeViewControllerDelegate error - black screen

    - by user1053839
    I'm using the following code to show in-app sms. My app don't have a status bar. (I'm using 320x480 pixels screen in portrait view). the problem is that when I load the controller, the screen becomes black as you can see from the image... http://desmond.imageshack.us/Himg211/scaled.php?server=211&filename=schermata092456187alle1.png&res=landing this is the code: MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init]; picker.messageComposeDelegate = self; picker.recipients = [NSArray arrayWithObject:@"123456789"]; // your recipient number or self for testing picker.body = @"test"; [self presentModalViewController:picker animated:YES];

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  • How do I write a Photoshop Extension (8BX) plugin?

    - by Oliver Ahul
    The Adobe Photoshop CS3/4 SDk has a lot of examples for Filter, Import, Export etc plugins but I havent found anything that illustrates how to write a 8BX plugin. Reason I need to write one is to add a new drop down menu to the Photoshop root toolbar (where it displays File, Edit, Image .. Window. Help drop down menus). I have seen product like OneSoftware install an 8BX plugin into Adobe Photoshop CS3\Plug-Ins\Extensions directory that causes PS to add adrop down menu for OneSoft. That suggest this is a solvable problem :-) I tried by changing an existing plugin in the SDlK samples but no go. Specifically i modified the resource file: resource 'PiPL' (ResourceID, plugInName " PiPL", purgeable) { { Kind { **Extension** }, Name { plugInName "..." }, ... Despite using the Extension Kind , PS never loads the plugin. It doesnt generate any compile time or load error either. Anyone has ideas on how to go about doing this ? Thanks

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  • Multiple sections on landing page only

    - by RDRAO
    Hi every one, I am very much new to Drupal but am loving it to start with. I got struck at a point with respect to theaming. I have a region called 'footer-teaser' just above footer. Its width is 800px. its been split into 3 equal size columns. Each column has the following. Image of size 120x120 Some teaser text Link to 'read more' The design requirement is all the above should be editable by the admin from the admin interface. If its static i would have hardcoded this but since the requirement is dynamic, i am not aware of how to achieve this. I have customised page.tpl for other sections of the page except this. I am sure someone else would have faced this issue before and was wondering if anyone can direct me in the right direction? Even better if an example is provided. Cheers RD

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  • CoreData leak when reading a property

    - by Kamchatka
    Hello, I have the following code in a loop iterating over the different document objects: NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; [document primitiveValueForKey:@"data"]; [data writeToFile:filename atomically:NO]; [document.managedObjectContext refreshObject:document mergeChanges:NO]; [pool release]; The "data" property is a large blob (a 1MB image). And as I monitor the memory with the Allocation Instrument memory usage is increasing. I cannot find where the leak is coming from and how to remove it. Thanks!

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  • Firing a Keyboard Event at the Body - JavaScript (?)

    - by user317985
    I've done a lot of research on this but have come up empty handed. What I would like to do is invoke or create an event for the right arrow key (Key Code 39). I was planning on using an onclick event inside an tag to go to a function where this event could be 'fired'. Any help would be appreciated. If anyone needs context, I have a jQuery content slider that's functionality is very hard to alter and currently the functionality I need to emulate only occurs when a user hits the right arrow on their keyboard. What I would like to do is tie an onclick() event to a image that when clicked on fires the right keyboard event and the content will slide. Please let me know if I can provide further details or explanation. My working demo for this is: http://greenplanet3d.com

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  • FileNotFoundException when cropping a photo

    - by James G
    I'm trying to crop a photo to use in a Live Wallpaper but I'm getting a FileNotFoundException when the crop activity tries to save my new cropped image. This is the code I'm using: File file = new File(getFilesDir(), "wallpaper.jpg"); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setData(uri); DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics); intent.putExtra("outputX", metrics.widthPixels * 2); intent.putExtra("outputY", metrics.heightPixels); intent.putExtra("aspectX", metrics.widthPixels * 2); intent.putExtra("aspectY", metrics.heightPixels); intent.putExtra("scale", true); intent.putExtra("noFaceDetection", true); intent.putExtra("output", Uri.parse("file:/" + file.getAbsolutePath())); startActivityForResult(intent, REQUEST_CROP_IMAGE); The wallpaper.jpg file seems to exist on DDMS file explorer so I'm not sure what I'm doing wrong. Any advice is greatly appreciated.

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  • Prevent the groupfield from repeating every three rows

    - by Aaron
    I have a web app and I need to integrate some JasperReports in this app. So I downloaded iReport and I used the templates. I choose the LeafGreen template, but I have a problem. When I have more than 4 elemets in my list, my headers gets repeated every 4 elements (see the image:) - I don't want this; once is enough. The problem: http://i39.tinypic.com/9kcp6p.jpg This is the template: http://i44.tinypic.com/2ags1w1.jpg What I'm doing wrong?

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  • How to store Hierarchical K-Means tree for a large number of images, using Opencv?

    - by AquaAsh
    I am trying to make a program that will find similar images from a dataset of images. The steps are 1)extract SURF descriptors for all images 2)store the descriptors 3)Apply knn on the stored descriptors 4)Match the stored descriptors to the query image descriptor using KNN Now each images SURF descriptor will be stored as Hierarchical k means tree, now do I store each tree as a separate file or is it possible to build some sort of single tree with all the images descriptors and updated as images are added to dataset. This is the paper I am basing the program on www.ijest.info/docs/IJEST10-02-03-13.pdf.

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  • jQuery create new div with ID?

    - by John
    Hello, I have form in my ASP.NET masterPage.master and if i click on submit it call some method from masterPage.master.cs file by ajax (i have it in update panel). But i want improve it with jQuery. So i have this: $('#submit').click(function () { $.ajax({ type: "POST", url: '<% Response.Write("~"+Request.Path); %>', beforeSend: function () { $(document.createElement('div')).width($('#formBox').width()) .height($('#formBox').height()) .css({ backgroundImage: 'url(/Static/Img/bc_overlay.png)', position: 'absolute', left: 0, top: 0, margin: "5px", textAlign: "center", color: "#000", display: "none" }) .append("<strong>Nacítám</strong><br /><img src='Static/Img/ajax-loader.gif' width='33px' height='33px' alt='loading' />") .fadeIn("slow") .prependTo($('#formBox')); $('#formBox').css('position', 'relative'); }, success: function () { } }); }); So if i click on submit, new div is creating (there is loading text and image, and cool opacity overlay), but how i give to this div some ID? Because i need use it in success: function () { } i need clear this box and write here some text (error or success).

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  • Will Algorithm written in OCaml compiled from C be Faster than Algorithm written in Pure C code?

    - by Ole Jak
    So I have some cool Image Processing algorithm. I have written it in OCaml. It performs well. I now I can compile it as C code with such command ocamlc -output-obj -o foo.c foo.ml (I have a situation where I am not alowed to use OCaml compiler to bild my programm for my arcetecture, I can use only specialy modified gcc. so I will compile that programm with sometyhing like gcc -L/usr/lib/ocaml foo.c -lcamlrun -lm -lncurses and Itll run on my archetecture.) I want to know in general case will my OCaml code compiled into C run faster than algorithm implemented in pure C?

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  • How to switch iostream from binary to text mode and vice versa?

    - by Mad Fish
    I want to read both formatted text and binary data from the same iostream. How can I do that? Why? Imagine this situation: You have different resources, and resource loaders for them, that take a std::istream as a parameter. And there are a "resource source" that provides these streams. Resources can be both text and binary and I need to handle both cases with resource loaders. Or other situation: Image that you have an archive with resources of mixed types. How can I get a text stream from inside the binary archive stream?

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  • text between lines in css

    - by Tom91136
    in CSS, how can i do something like: ---Item--- with the dash connected like a line? i thought of : border-bottom: 3px solid #000; but then i can't move the line upward plus the line would be behind the text, not surrounding the text my HTML <ul> <li class="sub-menu-item" ><a href="#">FACULTY&STAFF</a></li> </ul> (if possible, i would like to avoid touching the HTML) is all the above possible via css or should i just use an image after all?

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  • How taxing would a game map grid be to a web browser?

    - by Vilx-
    Suppose we're making a strategy game (think Civilization) in a web browser. The game has a visible map portion - say 30x30 squares. Each square is 30x30px and has several overlaid images - the terrain, resources, units, roads, etc. The classical way of drawing this would be with a huge <table> where each cell would contain absolutely positioned images. It would probably be rendered in Javascript to reduce traffic. But it's still several thousand images and a huge table. Can the browser take it? Will the performance not drop below any acceptable limits? Alternatively I could keep a pre-rendered map image with as many overlays as possible, but that would be more work, I think.

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  • Listview icons show up blurry (C#)

    - by Balk
    I'm attempting to display a "LargeIcon" view in a listview control, however the images I specify are blurry. This is what I have so far: The .png files are 48x48 and that's what I have it set to display at in the ImageList properties. There's one thing that I've noticed (which is probably the cause) but I don't know how to change it. Inside the "Images Collection Editor" where you choose what images you want for the ImageList control, it looks like it's setting the wrong size for each image. As you can see the "PhysicalDimension" and the "Size" is set to 16x16 and not abled to be manipulated. Does anyone have any ideas? Many thanks!

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  • ImageView source scaling done right. How?

    - by Aleksey Malevaniy
    Scope Image bitmap have to be shown as imageView.setImageBitmap(bitmap) and scaled to fit UI. This could be done via: bitmap = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true); xml's ImageView attributes such as android:layout_width="newWidth" android:layout_height="newHeight" android:adjustViewBounds="true" android:scaleType="fitCenter" Problem Which way is better for performance? I prefer xml 'cause this is UI specific problem and I prefer to use xmls for UI definition. Also we set width/height values in dp, it means we have the same UI for different screens. Thanks!

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  • Stubborn UIButton

    - by Mike
    I have a UIButton that is supposed to be disabled during certain phases. So, when this happens I do [myButton setEnabled:NO]; This is perfect because the button stays grayed and if clicked will not trigger its action, but... when the button is clicked even grayed, it enables again and a second click will trigger its actions (???????!!!!!!!!!!). How can that be? If the button is disabled it is supposed to be "part of the background", i.e., an image without any action. I have tried to make the button vanish using alpha but even if you click on the empty spot, it reappears after the first click and then can trigger actions after the second click... (????) Am I missing something?

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  • A basic animation not showing up

    - by Rilakkuma
    I still try different basics with android, and now I'm stuck with animation. I'm trying to implement a simple animation. I've defined animation in xml file like this: alpha android:interpolator="@android:anim/accelerate_interpolator" android:fromAlpha="0.0" android:toAlpha="1.0" duration="3000" repeatCount="infinite" In my main view group I have an ImageView defined like this: <ImageView android:id="@+id/someb" android:src="@drawable/earth_normal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dip"/> And this is from my starting activity class: public class Ohayou extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ImageView earth = (ImageView)findViewById(R.id.someb); Animation earthFadeInAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_in); earth.startAnimation(earthFadeInAnimation); } It finds ImageView successfuly and creates animation. but when I start emulator ImageView just shows the original src image, not an animation. What am I doing wrong? Thanks

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  • Input-type-file path, where is it stored on AJAX request ?!?

    - by Sheavi
    Hi, I have been monitoring the parameters a website receives when a file is uploaded (via an input type="file"). Surprisingly, the parameter and its value were looking like this : parameter: upfile value: filename="this is the name of the uploaded file.png" Content-type: image/x-png Now in this POST request to the server page, the file name and its type is passed into a parameter, but what about the path to that filename? Where is that path stored so that the server page can upload the file at the good location? Also, I would like to know if it would be possible by any way to specify a path, NOT to the input type="file" since its impossible, but to the server (though this question probably depends a lot on how the server-side page is scripted). Thank you for your answers.

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  • How can this code be made more Pythonic?

    - by usethedeathstar
    This next part of code does exactly what I want it to do. dem_rows and dem_cols contain float values for a number of things i can identify in an image, but i need to get the nearest pixel for each of them, and than to make sure I only get the unique points, and no duplicates. The problem is that this code is ugly and as far as I get it, as unpythonic as it gets. If there would be a pure-numpy-solution (without for-loops) that would be even better. # next part is to make sure that we get the rounding done correctly, and than to get the integer part out of it # without the annoying floatingpoint-error, and without duplicates fielddic={} for i in range(len(dem_rows)): # here comes the ugly part: abusing the fact that i overwrite dictionary keys if I get duplicates fielddic[int(round(dem_rows[i]) + 0.1), int(round(dem_cols[i]) + 0.1)] = None # also very ugly: to make two arrays of integers out of the first and second part of the keys field_rows = numpy.zeros((len(fielddic.keys())), int) field_cols = numpy.zeros((len(fielddic.keys())), int) for i, (r, c) in enumerate(fielddic.keys()): field_rows[i] = r field_cols[i] = c

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  • Displaying a "Loading..." screen in a UITableView like the AppStore App...

    - by Mugunth Kumar
    the App Store app and fairly a lot many apps display a view that says "Loading.." while the content is being retrieved. How can we do this? Should I remove the UITableView and call addSubView and then once the data is available, add the tableview back? Or is there any other shortcut? If my question is not clear, please see this image... http://www.flickr.com/photos/mugunthkumar/3774575906/ I want to know how to create a temporary loading view like this till my tableview contents are ready...

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  • PHP regular expression subpattern behaviour

    - by codecowboy
    I want to match both the src and title attributes of an image tag: pattern: <img [^>]*src=["|\']([^"|\']+["|\'])|title=["|\']([^"|\']+) target: <img src="http://someurl.jpg" class="quiz_caption" title="Caption goes here!"> This pattern gives me one unwanted match, title="content", and the match I actually want which is the value between the quotes after the word 'title', i.e 'content'. So, my matches are: <img src="http://someurl.jpg http://someurl.jpg title="Caption goes here!" Caption goes here! Is there a way to avoid the third of these matches? I'm using PCRE in PHP 5.2.x

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