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  • How can I change the CSS visibility style for elements that are not on the screen?

    - by RenderIn
    I have a lot of data being placed into a <DIV> with the overflow: auto style. Firefox handles this gracefully but IE becomes very sluggish both when scrolling the div and when executing any Javascript on the page. At first I thought IE just couldn't handle that much data in its DOM, but then I did a simple test where I applied the visibility: hidden style to every element past the first 100. They still take up space and cause the scrollbars to appear. IE no longer had a problem with the data when I did this. So, I'd like to have a "smart" div that hides all the nested div elements which are not currently visible on the screen. Is there a simple solution to this or will I need to have an infinite loop which calculates the location of the scrollbar? If not, is there a particular event that I can hook into where I could do this? Is there a jQuery selector or plugin that will allow me to select all elements not currently visible on the screen?

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  • CSS - how can I handle the size difference between serif and sans-serif fonts?

    - by orbit82
    I'm working on a WordPress that will allow the site administrator to switch between sans-serif and serif fonts. I'm trying to code the stylesheet in such a way that the font sizes are similar whether or not they choose Georgia vs Arial. The problem is that when I have it looking nice with a serif font, it looks WAY too big when in sans-serif. When I then adjust it to look nice in a sans-serif font, it looks WAY too small in serif. Is there an ideal font size and line-height that works well with both serif and sans-serif? Or do I need to make separate stylesheets (a serf version and a sans-serif version)? P.S. I've set a base font size on the body at 12px, and then set the rest of the font sizes as a percentage of the base. Of course, this base font size could be set in ems or in percent, because the percentages will still scale proportionally.

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  • Change a UIButton View's background upon press

    - by Michael
    This should be easy but its got me stumped. I've got a button on each row of a table cell. The button is to delete the file associated with that row. I have an image that indicates if the file is present on the iPhone or not present. When the user presses the button, the target action method (showDeleteSheet) then calls a UIActionSheet with a variable to give it the indexPath of the row pressed. Then the user presses delete on the action sheet and the action sheet's clickedButtonAtIndex method deletes the file. Now, I need to update the button's background image property to change the image in the appropriate table cell to the not downloaded image. This can be done in either the button's target action method or the action sheet's clickedButtonAtIndex method. Here is some code: In the table's cellForRowAtIndexPath method I create the button: UIButton *deleteButton = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; [deleteButton addTarget:self action:@selector(showDeleteSheet:) forControlEvents:UIControlEventTouchDown]; deleteButton.frame = CGRectMake(246, 26, 30, 30); if (![AppData isDownloaded:[dets objectForKey:@"fileName"]]) { [deleteButton setBackgroundImage:notdownloadedImage forState:UIControlStateNormal]; } else { [deleteButton setBackgroundImage:notdownloadedImage forState:UIControlStateNormal]; } In the button's target method: -(void)showDeleteSheet:(id)sender { //get the cell row that the button is in NSIndexPath *indexPath = [table indexPathForCell:(UITableViewCell *)[[sender superview] superview]]; NSInteger currentSection = indexPath.section; NSInteger currentIndexRow = indexPath.row; NSLog(@"section = %i row = %i", currentSection, currentIndexRow); UIButton *deleteButton = [UIButton buttonWithType:UIButtonTypeCustom]; [table reloadData]; //if deleteButton is declared in .h then the other instances of deleteButton show 'local declaration hides instance variable' [deleteButton setBackgroundImage:[UIImage imageNamed:@"not-downloaded.png"] forState:UIControlStateNormal]; UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Delete this file?" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Delete" otherButtonTitles:nil]; actionSheet.tag = currentIndexRow; actionSheet.actionSheetStyle = UIActionSheetStyleDefault; [actionSheet showInView:self.view]; [actionSheet release]; } Perhaps the issue is that the call to [deleteButton setBackgroundImage...]; doesn't know which cell's button should be updated. If so I don't know how to tell it which. Because I test if the file is downloaded when the button is made and the background image is set, when I scroll down so the cell in question is de-queued then scroll back up it show's the correct image. I've tried to force the table to reload but [table reloadData]; is doing nothing. I've tried reloadRowsAtIndexPaths and still no good. Any one care to educate me on how this is done?

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  • How to recognise vehicle licence / number plate (ANPR) from an image?

    - by Ryan ONeill
    Hi all, I have a web site that allows users to upload images of cars and I would like to put a privacy filter in place to detect registration plates on the vehicle and blur them. The blurring is not a problem but is there a library or component (open source preferred) that will help with finding a licence within a photo? Caveats; I know nothing is perfect and image recognition of this type will provide false positive and negatives. I appreciate that we could ask the user to select the area to blur and we will do this as well, but the question is specifically about finding that data programmatically; so answers such as 'get a person to check every image' is not helpful. This software method is called 'Automatic Number Plate Recognition' in the UK but I cannot see any implementations of it as libraries. Any language is great although .Net is preferred. Thanks in advance Ryan

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  • How to achieve a photo "stack" border effect with CSS?

    - by Sean Gough
    I'd like to be able to add a class to images that adds a border that makes them look like a stack of photos. Anyone know how to do this? Clarifications: Ideally something like the stack shown here but it doesn't need to be interactive and only needs to work for a single photo. I also don't mind using javascript if needed (jQuery would be preferred though).

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  • Saving and retrieving image in SQL database from C# problem

    - by Mobin
    I used this code for inserting records in a person table in my DB System.IO.MemoryStream ms = new System.IO.MemoryStream(); Image img = Image_Box.Image; img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); this.personTableAdapter1.Insert(NIC_Box.Text.Trim(), Application_Box.Text.Trim(), Name_Box.Text.Trim(), Father_Name_Box.Text.Trim(), DOB_TimePicker.Value.Date, Address_Box.Text.Trim(), City_Box.Text.Trim(), Country_Box.Text.Trim(), ms.GetBuffer()); but when i retrieve this with this code byte[] image = (byte[])Person_On_Application.Rows[0][8]; MemoryStream Stream = new MemoryStream(); Stream.Write(image, 0, image.Length); Bitmap Display_Picture = new Bitmap(Stream); Image_Box.Image = Display_Picture; it works perfectly fine but if i update this with my own generated Query like System.IO.MemoryStream ms = new System.IO.MemoryStream(); Image img = Image_Box.Image; img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); Query = "UPDATE Person SET Person_Image ='"+ms.GetBuffer()+"' WHERE (Person_NIC = '"+NIC_Box.Text.Trim()+"')"; the next time i use the same code for retrieving the image and displaying it as used above . Program throws an exception

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  • jquery background image rotating script doesn't work

    - by Catfish
    I'm writing this script to rotate a background Image every 3 seconds but it doesn't work at all and i'm stumped as to why not. $(document).ready(function() { var inc = 0; var bgImages = new Array(); bgImages.push("../Images/backgroundDog-small.jpg"); bgImages.push("../Images/backgroundDog1-small.jpg"); bgImages.push("../Images/backgroundDog2-small.jpg"); bgImages.push("../Images/backgroundDog3-small.jpg"); setInterval(change, 3000); function change() { //if we're not at the end of the array if (inc < (bgImages.length)) { var image = bgImages[inc]; $('body').css('backgroundImage', image); console.log(image); inc++; //reset the counter inc and go through the array again } else { inc = 0; } } });

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  • How to set incremental CSS classes in each Table Cell with jQuery?

    - by Mark Rapp
    I have a table populated via a DB and it renders like so (it could have any number of columns referring to "time", 5 columns, 8 columns, 2 columns, etc): <table id="eventInfo"> <tr> <td class="name">John</td> <td class="date">Dec 20</td> <td class="**time**">2pm</td> <td class="**time**">3pm</td> <td class="**time**">4pm</td> <td class="event">Birthday</td> </tr> <tr> <td class="name">Billy</td> <td class="date">Dec 19</td> <td class="**time**">6pm</td> <td class="**time**">7pm</td> <td class="**time**">8pm</td> <td class="event">Birthday</td> </tr> With jQuery, I'd like to go through each Table Row and incrementally set an additional class-name on only the Table Cells where "class='time'" so that the result would be: John Dec 20 2pm 3pm 4pm Birthday Billy Dec 19 6pm 7pm 8pm Birthday I've only been able to get it to count all of the Table Cells where "class='time'" and not each set within its own Table Row. This is what I've tried with jQuery: $(document).ready(function() { $("table#eventInfo tr").each(function() { var tcount = 0; $("td.time").attr("class", function() { return "timenum-" + tcount++; }) //writes out the results in each TD .each(function() { $("span", this).html("(class = '<b>" + this.className + "</b>')"); }); }); }); Unfortunately, this only results in: <table id="eventInfo"> <tr> <td class="name">John</td> <td class="date">Dec 20</td> <td class="**time** **timenum-1**">2pm</td> <td class="**time** **timenum-2**">3pm</td> <td class="**time** **timenum-3**">4pm</td> <td class="event">Birthday</td> </tr> <tr> <td class="name">Billy</td> <td class="date">Dec 19</td> <td class="**time** **timenum-4**">6pm</td> <td class="**time** **timenum-5**">7pm</td> <td class="**time** **timenum-6**">8pm</td> <td class="event">Birthday</td> </tr> Thanks for your help!

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  • Best Free Windows Imaging Software For Servers

    - by Justin
    We are running two physical servers both Windows 2003, not virtualized. What is the best free (if any) windows software to take a full image backup of the entire drives? If possible, while the image is taking place, it should not bring the hosts to their knees with excess CPU or I/O usage. The servers have RAID mirroring, but after hearing a few horror stories about hacked systems, we need to have weekly full image backups, so we can simply revert to a pre-hacked image. Thanks.

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  • Display new image on web page

    - by RuiT
    Hello, I'm uploading images to a folder and I want to display each new image on a web page every time it is saved in the folder. I can display the initial image, which is already in the folder, and I can also detect when a new image is saved into the folder but I don't know how to display the new images. I'm new to web development. Can somebody help me? Here's the code: public partial class _Default : System.Web.UI.Page { string DirectoryPath = "C:\\Users\\Desktop\\PhotoUpload\\Uploads\\"; protected void Page_Load(object sender, EventArgs e) { FileSystemWatcher watcher = new FileSystemWatcher(); try { watcher.Path = DirectoryPath; watcher.Created += new FileSystemEventHandler(watcher_Created); watcher.EnableRaisingEvents = true; Image image = Image.FromFile(DirectoryPath + "inicial.jpg"); MemoryStream ms = new MemoryStream(); image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] im = ms.ToArray(); Context.Response.ContentType = "Image/JPG"; Context.Response.BinaryWrite(im); } catch (Exception ex) { } } void watcher_Created(object sender, FileSystemEventArgs e) { Console.WriteLine("File Created: Name: " + e.Name); try { //How to display new image? } catch (Exception ex) { } } }

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  • Put together tiles in android sdk and use as background

    - by Jon
    In a feeble attempt to learn some Android development am I stuck at graphics. My aim here is pretty simple: Take n small images and build a random image, larger than the screen with possibility to scroll around. Have an animated object move around on it I have looked at the SDK examples, Lunar Lander especially but there are a few things I utterly fail to wrap my head around. I've got a birds view plan (which in my head seems reasonably sane): How do I merge the tiles into one large image? The background is static so I figure I should do like this: Make a 2d array with refs to the tiles Make a large Drawable and draw the tiles on it At init draw this big image as the background At each onDraw redraw the background of the previous spot of the moving object, and the moving object at its new location The problem is the hands on things. I load the small images with "Bitmap img1 = BitmapFactory.decodeResource (res, R.drawable.img1)", but then what? Should I make a canvas and draw the images on it with "canvas.drawBitmap (img1, x, y, null);"? If so how to get a Drawable/Bitmap from that? I'm totally lost here, and would really appreciate some hands on help (I would of course be grateful for general hints as well, but I'm primarily trying to understand the Graphics objects). To make you, dear reader, see my level of confusion will I add my last desperate try: Drawable drawable; Canvas canvas = new Canvas (); Bitmap img1 = BitmapFactory.decodeResource (res, R.drawable.img1); // 50 x 100 px image Bitmap img2 = BitmapFactory.decodeResource (res, R.drawable.img2); // 50 x 100 px image canvas.drawBitmap (img1, 0, 0, null); canvas.drawBitmap (img2, 50, 0, null); drawable.draw (canvas); // obviously wrong as draw == null this.setBackground (drawable); Thanks in advance

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  • WCF Service with callbacks coming from background thread?

    - by Mark Struzinski
    Here is my situation. I have written a WCF service which calls into one of our vendor's code bases to perform operations, such as Login, Logout, etc. A requirement of this operation is that we have a background thread to receive events as a result of that action. For example, the Login action is sent on the main thread. Then, several events are received back from the vendor service as a result of the login. There can be 1, 2, or several events received. The background thread, which runs on a timer, receives these events and fires an event in the wcf service to notify that a new event has arrived. I have implemented the WCF service in Duplex mode, and planned to use callbacks to notify the UI that events have arrived. Here is my question: How do I send new events from the background thread to the thread which is executing the service? Right now, when I call OperationContext.Current.GetCallbackChannel<IMyCallback>(), the OperationContext is null. Is there a standard pattern to get around this? I am using PerSession as my SessionMode on the ServiceContract. UPDATE: I thought I'd make my exact scenario clearer by demonstrating how I'm receiving events from the vendor code. My library receives each event, determines what the event is, and fires off an event for that particular occurrence. I have another project which is a class library specifically for connecting to the vendor service. I'll post the entire implementation of the service to give a clearer picture: [ServiceBehavior( InstanceContextMode = InstanceContextMode.PerSession )] public class VendorServer:IVendorServer { private IVendorService _vendorService; // This is the reference to my class library public VendorServer() { _vendorServer = new VendorServer(); _vendorServer.AgentManager.AgentLoggedIn += AgentManager_AgentLoggedIn; // This is the eventhandler for the event which arrives from a background thread } public void Login(string userName, string password, string stationId) { _vendorService.Login(userName, password, stationId); // This is a direct call from the main thread to the vendor service to log in } private void AgentManager_AgentLoggedIn(object sender, EventArgs e) { var agentEvent = new AgentEvent { AgentEventType = AgentEventType.Login, EventArgs = e }; } } The AgentEvent object contains the callback as one of its properties, and I was thinking I'd perform the callback like this: agentEvent.Callback = OperationContext.Current.GetCallbackChannel<ICallback>(); How would I pass the OperationContext.Current instance from the main thread into the background thread?

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  • CSS menu bar wont show!!! class or ID problem?

    - by Tran
    Hello everyone, Please help me with this insanity: http://imageoneads.com/zenliver/ My menu bar worked fine & I accidently deleted or moved one of class or ID. Now it disappeared. All browsers Wont display the menu, except Firefox for Mac. This drives me nut....Cant believe I have to start over if I can't figure it out....Please help....Thanks ahead tran006

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  • css/html: white space break fix and now cant code fine?

    - by Karem
    Yes, so I got the problem that if you type a long sentence with no space e.g eeeeeeeeeeeeeeeeeeeeeeee, it will break itself, but then now I would need to start typing some ugly non-breaking coding. Example: http://jsfiddle.net/r3CFJ/ I need to have everything in one sentence in order not to make it break itself. Check here to see the result of not having everything in one sentence: http://jsfiddle.net/r3CFJ/1/ How can I fix this please any solutions?? as my further coding will get very ugly and not readable?

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  • GDI+ Rotated sub-image

    - by Andrew Robinson
    I have a rather large (30MB) image that I would like to take a small "slice" out of. The slice needs to represent a rotated portion of the original image. The following works but the corners are empty and it appears that I am taking a rectangular area of the original image, then rotating that and drawing it on an unrotated surface resulting in the missing corners. What I want is a rotated selection on the original image that is then drawn on an unrotated surface. I know I can first rotate the original image to accomplish this but this seems inefficient given its size. Any suggestions? Thanks, public Image SubImage(Image image, int x, int y, int width, int height, float angle) { var bitmap = new Bitmap(width, height); using (Graphics graphics = Graphics.FromImage(bitmap)) { graphics.TranslateTransform(bitmap.Width / 2.0f, bitmap.Height / 2.0f); graphics.RotateTransform(angle); graphics.TranslateTransform(-bitmap.Width / 2.0f, -bitmap.Height / 2.0f); graphics.DrawImage(image, new Rectangle(0, 0, width, height), x, y, width, height, GraphicsUnit.Pixel); } return bitmap; }

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  • CSS gurus, can I make my absolutely positioned child element force the main parent's height?

    - by alex
    This is kind of hard to explain. I have an absolutely positioned floating secondary content box. It works great in all occurrences. Except, when you submit a form and don't fill out the fields (see here, and push send). The box expands to show the errors, and underneath the footer there is a blank space. The best example I can give is to see it in action (link above). I've played with min-height and it didn't work too good. I'd also like to avoid expanding the footer with code in the event of form errors if I can help it. Should I ditch the absolute positioning? And try with margins? Is there any other way to get it to work?

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  • MPMoviePlayerController not setting the bounds for background image

    - by VXtreme
    I am using MPMoviePlayerController for playing the media . I want to set the image at the background of the player.The image is set accordingly but when i set the bounds for the image then the image is not set according to bounds . I have tried following code: UIImageView *imageView=[[UIImageView alloc]initWithImage:[operationControl getCoverImage:stringId]]; imageView.bounds=CGRectMake(0, 100, 200, 200); [moviePlayer.backgroundView addSubview:imageView]; [moviePlayer.backgroundView setBackgroundColor:[UIColor purpleColor]]; moviePlayer.controlStyle = MPMovieControlStyleDefault; moviePlayer.shouldAutoplay = YES; [moviePlayer setScalingMode:MPMovieScalingModeAspectFit]; [self.view addSubview:moviePlayer.view]; [moviePlayer setFullscreen:YES animated:YES];

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  • Determine image src in onload and onerror event handlers in IE

    - by Bill
    How can I determine the image src of the image that triggered the event in the onload and onerror event handlers in IE? This example code I threw together: <script language="javascript" type="text/javascript" src="jquery.js"></script> <script language="javascript" type="text/javascript"> function loadImages() { var goodImage = new Image(); var missingImage = new Image(); $(goodImage).bind('load', function(event){ $("#log").append( $(event.target).attr('src') + ' WAS FOUND <br>'); }); $(missingImage).bind('load', function(event){ $("#log").append( $(event.target).attr('src') + ' WAS FOUND <br>' ); }); $(goodImage).bind('error', function(event){ $("#log").append( $(event.target).attr('src') + ' IS MISSING <br>'); }); $(missingImage).bind('error', function(event){ $("#log").append( $(event.target).attr('src') + ' IS MISSING <br>'); }); goodImage.src = 'GOOD-IMAGE.GIF'; // this image exists missingImage.src = 'MISSING-IMAGE.GIF'; // this image doesn't exist } </script> </head> <body onload="loadImages();"> <div id="log"></div> works in FF but in IE8 it prints out undefined for the $(event.target).attr('src') part. I thought jQuery was supposed to normalize the event object for IE so that it acted like other browsers? I've tried a number of permutations but haven't been able to get anything to work in IE8. Anyway if anyone has a suggestion on how to figure out the image src in the onload and onerror event handlers that works in IE I would really appreciate it. Or even how to figure out after the images have loaded which have loaded and which haven't (but not graphically - I need to generate an array containing the filenames of the images that didn't load). Thanks!

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  • Can this auto-stretcing scenario be realized undex XHTML/CSS?

    - by Vilx-
    I want two horizontal areas in my webpage. The first one is the menu. It's on the top. Unfortunately I don't know its size, and it might change in response to user actions. Below the menu is the main area which should stretch at least as far as the bottom of the window (if there is little content) or beyond (if there is a lot of content. To illustrate with ASCII art: +----------------------------------------------------+ | This area resizes vertically depending on contents | +----------------------------------------------------+ | This area stretches to the bottom of the window, | | but can be even larger if necessary. Note: this | | should be a separate area because it will contain | | children with height:100% as well. | | | +----------------------------------------------------+ Can this be done? Can it be done with Javascript? Added: To put things in perspective and avoid confusion, think of it this way: the top menu is generated by myself, but the bottom area is an IFrame which I want to fill the rest of the page. This is what it eventually comes down to anyway in my case.

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