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  • Objective-C Definedness

    - by Dan Ray
    This is an agonizingly rookie question, but here I am learning a new language and framework, and I'm trying to answer the question "What is Truth?" as pertains to Obj-C. I'm trying to lazy-load images across the network. I have a data class called Event that has properties including: @property (nonatomic, retain) UIImage image; @property (nonatomic, retain) UIImage thumbnail; in my AppDelegate, I fetch up a bunch of data about my events (this is an app that shows local arts event listings), and pre-sets each event.image to my default "no-image.png". Then in the UITableViewController where I view these things, I do: if (thisEvent.image == NULL) { NSLog(@"Going for this item's image"); UIImage *tempImage = [UIImage imageWithData:[NSData dataWithContentsOfURL: [NSURL URLWithString: [NSString stringWithFormat: @"http://www.mysite.com/content_elements/%@_image_1.jpg", thisEvent.guid]]]]; thisEvent.image = tempImage; } We never get that NSLog call. Testing thisEvent.image for NULLness isn't the thing. I've tried == nil as well, but that also doesn't work.

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  • How to display image in Swing? in textarea?

    - by Nitesh Panchal
    Hello, I am creating a chat application using JApplet. I have a TextArea where all chat messages go. Everything in working fine and smooth just as you would expect a basic chat application to do. Now i want to add support for gestures. I wanted to know, how can we show an icon in textarea? it only takes string in append() method. Thanks in advance :)

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  • how do i keep the aspect ratio on image buttons in android?

    - by clayton33
    i have 5 square ImageButtons that i want to have lined up side by side on the bottom of the screen. I have each one set (different id's) as: <ImageButton android:id="@+id/box1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:adjustViewBounds="true" android:scaleType="fitXY" android:layout_weight="1" android:layout_margin="1dp" /> and i have the background assigned in main java like this: int[] imageIds = new int[] {R.id.box1,R.id.box2,R.id.box3,R.id.box4,R.id.box5}; for(int i = 0; i<5; i++){ imageButtons[i] = (ImageButton) findViewById(imageIds[i]); imageButtons[i].setBackgroundResource(R.drawable.blank); } what i would like to have it do is scale the width to fit neatly side-by-side at the bottom of the screen (which it does now ok), but have the height automatically scale to match the width as well. is this possible? i don't want to use setImageSource because then it puts a border around the imagebutton.

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  • How to create an image from array of pixel colors? (Flash, Actionscript 3)

    - by Ole Jak
    I have a Width and Height parametr. I have been given an array of colors in such format: [r, g, b, a, r, g, b, a, r, g, b, a... etc] Data can be acsessed by something like this for(var y = 0; y < height; y++) { for(var x = 0; x < width; x++) { r = data[y*width + x + 0] g = data[y*width + x + 1] b = data[y*width + x + 2] a = data[y*width + x + 3] } } I want to paint that data on some sprite. How to do such thing? BTW: I use Flash Builder for mxml+actionscript coding. So if it is easy for you you can give example using MXML (not todraw on some sprite but on some MXML component).

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  • Why does my JQuery Image swap not work in firefox or chrome, but fine in IE?

    - by Cognize
    Hi, Relatively new to JQuery. I've got some code that does a banner swap with a fade in fade out transition. The images swap as expected in IE8, chrome, and firefox. However, the actual fade, the smooth transition between images only works in IE. Can anyone point me in the right direction for a fix? Javascript: function swapImages() { var $active = $('#transitionImagePlaceHolder .active'); var $next = ($('#transitionImagePlaceHolder .active').next().length > 0) ? $('#transitionImagePlaceHolder .active').next() : $('#transitionImagePlaceHolder img:first'); $active.fadeOut( 'slow', function () { $next.fadeIn('slow').addClass('active'); $active.removeClass('active'); }); } $(document).ready(function () { setInterval('swapImages()', 5000); }); CSS: #transitionImagePlaceHolder { } #transitionImagePlaceHolder { position:relative; left: 26px; } #transitionImagePlaceHolder img { display:none; position:absolute; top:4; left:10; } HTML: <div id="transitionImagePlaceHolder"> <img class="active" src="Images/TransitionImages/Trans_Img_1.jpg" /> <img src="Images/TransitionImages/Trans_Img_2.jpg" /> <img src="Images/TransitionImages/Trans_Img_3.jpg" /> </div>

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  • Simple graphics API with transparency, polygons, reading image pixels?

    - by M. Elkstein
    I need a simple graphics library that supports the following functionality: Ability to draw polygons (not just rectangles!) with RGBA colors (i.e., partially transparent), Ability to load bitmap images, Ability to read current color of pixel in a given coordinate. Ideally using JavaScript or Python. Seems like HTML 5 Canvas can handle #2 and #3 but not #1, whereas SVG can handle #1 and #2 but not #3. Am I missing something (about either of these two)? Or are there other alternatives?

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  • Can I update an image in the drawable directory from code?

    - by kknight
    I have a picture in res/drawable directory: res/drawable/picture.jpeg. Can I dynamically update this picture.jpeg from code? i.e. I want to use another picture to replace this picture in the drawable directory dynamically. If I can, what path should I use to access the picture? Should I use "res/drawable/picture.jpeg"? Thanks.

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  • how to hide the image? how can i do ?

    - by user309381
    function Psend() { new Ajax.Request('Handler.ashx', { method: 'get', onSuccess: function(transport) { var response = transport.responseText || "no response text"; //alert("Success! \n\n" + response); var obj = response.evalJSON(true); for (i = 0; i < 4; i++) { DeCheBX = $('MyDiv').insert(new Element('input', { 'type': 'checkbox', 'id': "img" + obj[i].Nam, 'value': obj[i].IM, 'onClick': 'SayHi(this)' })); DeImg = $('MyDiv').insert(new Element('img', { 'id': "img" + obj[i].Nam, 'src': obj[i].IM, 'style': 'display = inline', 'onClick': 'Say(this)' })); document.body.appendChild(DeCheBX); document.body.appendChild(DeImg); } }, onFailure: function() { alert('Something went wrong...') } }); SayHi = function(x) { if ($(x).checked == true) { // $('id').hide(); **$('img'+i).style.visibility = "hidden";**// doesnt work } };

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  • Dynamically Changing an img tag's onemouseover attribute with Javascript nulls it instead

    - by ?s?zs?
    I want to create an img that has four different states: State 1 over State 1 out State 2 over State 2 out Each state is a different image, and the user can toggle between states 1 and 2 by clicking on the image. To do this I change the src when the image is clicked and the onmouseover and onmouseout attributes of the img element. However when the attributes have been changed they become nulled and do nothing. How can I dynamically change these properties? Here is the code I am using: <!DOCTYPE html> <html> <head> <script> function change() { document.getElementById('image').src="http://youtube.thegoblin.net/layoutFix/hideplaylist.png"; document.getElementById('image').onmouseover="this.src='http://youtube.thegoblin.net/layoutFix/hideplaylistDark.png'"; document.getElementById('image').onmouseout="this.src='http://youtube.thegoblin.net/layoutFix/hideplaylist.png'"; } </script> </head> <body> <img id="image" src="http://youtube.thegoblin.net/layoutFix/showplaylist.png" onmouseover="this.src='http://youtube.thegoblin.net/layoutFix/showplaylistDark.png'" onmouseout="this.src='http://youtube.thegoblin.net/layoutFix/showplaylist.png'" onClick="change()"> </body> </html>

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  • How can I create a drawable which changes depends on state AND also overlay a image?

    - by michael
    Hi, I have a TextView which has a drawable changes depends on state: <TextView android:background="@drawable/textbackground"...> And my textbackground.xml is <selector> <item android:state_focused="true" android:drawable="@drawable/highlightborder" /> </selector> And highlightborder.xml is <shape xmlns:android="http://schemas.android.com/apk/res/android"> <stroke android:width="1dp" android:color="#FFFF0000" /> <solid android:color="@android:color/transparent"/> </shape> Now, how can I add an png to the background of TextView while should the highlightborder when it has focus? Thank you.

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  • PHP GD problem--not enough permission to make image?

    - by aaron
    Error: Warning: imagejpeg() [function.imagejpeg]: Unable to open 'images/xxx/xxx.jpg' for writing: Permission denied in /usr/www/users/xxx/resources/func.createthumbs.php on line 48 images/xxx/xxx/xxx.jpg Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/xxx/resources/updatethumbs.php:17) in /usr/www/users/xxx/resources/func.createthumbs.php on line 3 So... How can I change the permission? This is being run on a shared server--is it possible?

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  • jQuery relative positioned hover

    - by danixd
    I want a link to the next or previous image to appear when hovering over the main image, only I want the next link to appear when hovered over the right hand side, and previous on the left. I have looked at jQuery's .position() and I don't think I am understanding it very well. At the moment all I have is general mouseenter/mouseleave events, which show both links when the image is hovered. jQuery(document).ready(function($) { $('.nav-controls a').hide(); $('#slideshow').mouseenter(function() { $('.nav-controls a').fadeIn(500); }); $('#slideshow').mouseleave(function() { $('.nav-controls a').fadeOut(500); }); }); I'd image it to be something like: jQuery(document).ready(function($) { $('.nav-controls a').hide(); var image = $('#slideshow'); var left = image.position().left(0); var right = image.position().left(50%); left.mouseenter(function() { $('.nav-controls a.previous').fadeIn(500); }); left.mouseleave(function() { $('.nav-controls a.previous').fadeOut(500); }); right.mouseenter(function() { $('.nav-controls a.next').fadeIn(500); }); right.mouseleave(function() { $('.nav-controls a.next').fadeOut(500); }); }); Not sure if I should be using position, if I am using it correctly. Any tips would be great. Edit: I do not want to add unnecessary markup in the form of divs, for the left/right selectors.

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  • How do I style just the thumbnail image in this post?

    - by Mike Johnston
    I need help with some CSS styling. I've tried various options with Firebug and cannot sort this out. How can I style the thumbnails on my posts (eg url: http://thatcriticguy.com/index.php?post/4/crossover-9-revamped-reinvented-and-a-must-have) and not style all images in the post at the same time. I have numerous posts on this site and need to only style the ones that are thumbnails that float right. Is there a way to do this without modifying the template code just using CSS?

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  • Want to convert whole PHP script in RUBY ON RAILS

    - by user303058
    // set image quality (from 0 to 100, not applicable to gif) $imgquality = 100; // get data from $_POST or $_GET ? $data = &$_POST; // get image dimensions $width = (int) $data['width']; $height = (int) $data['height']; // create image object $img = imagecreatetruecolor($width, $height); // populate image with pixels for ($y = 0; $y < $height; $y++) { // innitialize $x = 0; // get row data $row = explode(',', $data['r'.$y]); // place row pixels $cnt = sizeof($row); for ($r = 0; $r < $cnt; $r++) { // get pixel(s) data $pixel = explode(':', $row[$r]); // get color $pixel[0] = str_pad($pixel[0], 6, '0', STR_PAD_LEFT); $cr = hexdec(substr($pixel[0], 0, 2)); $cg = hexdec(substr($pixel[0], 2, 2)); $cb = hexdec(substr($pixel[0], 4, 2)); // allocate color $color = imagecolorallocate($img, $cr, $cg, $cb); // place repeating pixels $repeat = isset($pixel[1]) ? (int) $pixel[1] : 1; for ($c = 0; $c < $repeat; $c++) { // place pixel imagesetpixel($img, $x, $y, $color); // iterate column $x++; } } } // set proper content type header('Content-type: image/'.$imgtype); header('Content-Disposition: attachment; filename="chart.'.$imgtype.'"'); // stream image $function = 'image'.$imgtype; if ($imgtype == 'gif') { $function($img); } else { $function($img, null, $imgquality); } // destroy imagedestroy($img); ?

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  • What's the best CDN for image hosting on a high-volume web site?

    - by Mike
    Akamai is way too expensive. Photobucket is not reliable. Is there a great content delivery network that I can use just to host my images? We deploy images programmatically via FTP, so there is some programming behind the scenes. Having some sort of reporting about the reliability of the service, whether it's raw logs files or a web-based admin screen that shows http errors, would also be important. Has anyone worked with edgecast?

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  • getting all of the image absolute path in a page?

    - by ryanxu
    I am trying to get the src of all of the images in a page. But some pages use absolute paths and some do not. So I am wondering whats the best way to do this? right now I am using this. $imgsrc_regex = '#<\s*img [^\>]*src\s*=\s*(["\'])(.*?)\1#im'; preg_match_all($imgsrc_regex, $html, $matches);

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  • Selenium : Handling Loading screens obscuring the web elements. (Java)

    - by Sheldon Cooper
    I'm writing an automated test case for a web page. Here's my scenario. I have to click and type on various web elements in an html form. But, sometimes while typing on a text field, an ajax loading image appears , fogging all elements i want to interact with. So, I'm using web-driver wait before clicking on the actual elements like below, WebdriverWait innerwait=new WebDriverWait(driver,30); innerwait.until(ExpectedConditions.elementToBeClickable(By.xpath(fieldID))); driver.findelement(By.xpath(fieldID)).click(); But the wait function returns the element even if it is fogged by another image and is not clickable. But the click() throws an exception as Element is not clickable at point (586.5, 278). Other element would receive the click: <div>Loading image</div> Do I have to check every time if the loading image appeared before interacting with any elements?.(I can't predict when the loading image will appear and fog all elements.) Is there any efficient way to handle this? Currently I'm using the following function to wait till the loading image disappears, public void wait_for_ajax_loading() throws Exception { try{ Thread.sleep(2000); if(selenium.isElementPresent("id=loadingPanel")) while(selenium.isElementPresent("id=loadingPanel")&&selenium.isVisible("id=loadingPanel"))//wait till the loading screen disappears { Thread.sleep(2000); System.out.println("Loading...."); }} catch(Exception e){ Logger.logPrint("Exception in wait_for_ajax_loading() "+e); Logger.failedReport(report, e); driver.quit(); System.exit(0); } } But I don't know exactly when to call the above function, calling it at a wrong time will fail. Is there any efficient way to check if an element is actually clickable? or the loading image is present? Thanks..

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  • How to resize an image smoothly (with resampling) using Windows API calls?

    - by Clay Nichols
    I need to resize images and resample them so they don't end up all jagged (I think that's called aliasing). I found some code (sorry, lost the link) that does this in pure VB6 code but it's a bit slow (2-5 seconds) and I'm displaying pictures in real time so I need something faster. I seem to recall seeing some examples of doing this with the GDI+ library. An example in VB6 would be ideal, but I can probably work with a simple example with Windows API calls in another language.

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  • How can I highlight an image on an iPhone?

    - by cometcomet
    I have a photo displayed on an iPhone. I would like to lower brightness of the photo at first, and when the user touches the photo, I would like to raise the brightness of the rectangular region near where the user touched, like this: www.cottagearts.net/tut_images/tut_cropping_pse_06.jpg Could anyone point me to a simple way of doing this?

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