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  • How do I overlay text on an image who's size is to be set?

    - by Mike
    I am trying to make a bar chart using tables, which I have almost accomplished to my liking. The last step I want is text over my image which represents the bar. Here is the code I have thus far for building my little bar charts: $height = 50; //build length $width = 450; $multi = $brewAvg / 5; $width = $width * $multi; print " <tr > <td > $count. <a href=\"$breweryURL\"> $brewR</a> </td> <td > <img src=\"blueBar.png\" width=\"$width\" height=\"$height\"> </td> </tr> "; And this produces something like this: You can see in the code how I simply calculate the length of the bar based on a breweries rating. What I want to do next is have the rating number show on top of each breweries on the left hand side. How would I go about accomplishing this? Update: I tried a tutorial I read here: http://www.kavoir.com/2009/02/css-text-over-image.html and I changed my code to this: print "<div class=\"overlay\"> "; print " <tr valign=\"middle\" > <td > $count. <a href=\"$breweryURL\"> $brewR</a> </td> <td > <img src=\"blueBar.png\" width=\"$width\" height=\"$height\"> </td> </tr> "; print" <div class=\"text\"> <p> $brewAvg </p> </div> </div> "; And my css I added was this: <style> .overlay { position:relative; float:left; /* optional */ } .overlay .text { position:absolute; top:10px; /* in conjunction with left property, decides the text position */ left:10px; width:300px; /* optional, though better have one */ } </style> And it did put any of the value son top of my images. All the text is in a list above all the bars like this:

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  • UIScrollView with pages enabled and device rotation/orientation changes (MADNESS)

    - by jbrennan
    I'm having a hard time getting this right. I've got a UIScrollView, with paging enabled. It is managed by a view controller (MainViewController) and each page is managed by a PageViewController, its view added as a subview of the scrollView at the proper offset. Scrolling is left-right, for standard orientation iPhone app. Works well. Basically exactly like the sample provided by Apple and also like the Weather app provided with the iPhone. However, when I try to support other orientations, things don't work very well. I've supported every orientation in both MainViewController and PageViewController with this method: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } However, when I rotate the device, my pages become quite skewed, and there are lots of drawing glitches, especially if only some of the pages have been loaded, then I rotate, then scroll more, etc... Very messy. I've told my views to support auto-resizing with theView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; But to no avail. It seems to just stretch and distort my views. In my MainViewController, I added this line in an attempt to resize all my pages' views: - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * ([self.viewControllers count]), self.scrollView.frame.size.height); for (int i = 0; i < [self.viewControllers count]; i++) { PageViewController *controller = [self.viewControllers objectAtIndex:i]; if ((NSNull *)controller == [NSNull null]) continue; NSLog(@"Changing frame: %d", i); CGRect frame = self.scrollView.frame; frame.origin.x = frame.size.width * i; frame.origin.y = 0; controller.view.frame = frame; } } But it didn't help too much (because I lazily load the views, so not all of them are necessarily loaded when this executes). Is there any way to solve this problem?

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  • JavaScript - Settting property on Object in Image load function, property not set once outside funct

    - by Sunday Ironfoot
    Sometimes JavaScript doesn't make sense to me, consider the following code that generates a photo mosaic based on x/y tiles. I'm trying to set a .Done property to true once each Mosaic image has been downloaded, but it's always false for some reason, what am I doing wrong? var tileData = []; function generate() { var image = new Image(); image.onload = function() { // Build up the 'tileData' array with tile objects from this Image for (var i = 0; i < tileData.length; i++) { var tile = tileData[i]; var tileImage = new Image(); tileImage.onload = function() { // Do something with this tile Image tile.Done = true; }; tileImage.src = tile.ImageUrl; } }; image.src = 'Penguins.jpg'; tryDisplayMosaic(); } function tryDisplayMosaic() { setTimeout(function() { for (var i = 0; i < tileData.length; i++) { var tile = tileData[i]; if (!tile.Done) { tryDisplayMosaic(); return; } } // If we get here then all the tiles have been downloaded alert('All images downloaded'); }, 2000); } Now for some reason the .Done property on the tile object is always false, even though it is explicitly being set to true inside tileImage.onload = function(). And I can ensure you that this function DOES get called because I've placed an alert() call inside it. Right now it's just stuck inside an infinite loop calling tryDisplayMosaic() constantly. Also if I place a loop just before tryDisplayMosaic() is called, and in that loop I set .Done = true, then .Done property is true and alert('All images downloaded'); will get called.

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  • UIWebView rotation and memory problem

    - by Fer
    Hi. I have an UIWebView that loads a embedded XHTML like this: body = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; body.scalesPageToFit = YES; body.backgroundColor = [UIColor scrollViewTexturedBackgroundColor]; body.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin; [self.view addSubview:body]; [body loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"article16" ofType:@"xhtml"]isDirectory:NO]]]; This XHTML have a lot of images, and when I rotate the device I got some memory warnings, and sometimes the app crashes. If I remove the autoresizing mask, specifically the UIViewAutoresizingFlexibleWidth (I have tryed with only UIViewAutoresizingFlexibleLeftMargin and UIViewAutoresizingFlexibleRightMargin with no problems), the memory warning stops, and the app does not crash anymore. If I remove all autoresizing mask, and set the new webView frame in didRotate or willRotate, I got the same warnings as using the UIViewAutoresizingFlexibleWidth. There's a app, called Atomic Web that could open the same XHTML and rotate with no memory warnings, and safari can open it as well, but if I create a project with only that UIWebView, the app sometimes crashes. Someone knows what this may be? Can I set the webview frame in other way? Why can't I use the autoresizing mask? Thanks for your attention.

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  • jquery stop image rotation on mouseover, start on mouseout / hover

    - by Matt Nathanson
    I have built a jQuery rotator to rotate through 3 divs and loop them. I would like to add the functionality on mouse over to "freeze" the current div and then start again on mouse out. I've thought about setting a variable to false at the start of the function and setting it true when it's on it's current frame but I've got my self a bit confused. I've also tried to use the hover function but when using the in and out handlers, I'm confused as to how to stop, restart the animation. function ImageRotate() { var CurrentFeature = "#container" + featureNumber; $(CurrentFeature).stop(false, true).delay(4500).animate({'top' : '330px'}, 3000); var featureNumber2 = featureNumber+1; if ( featureNumber == numberOfFeatures) {featureNumber2 = 1} var NewFeature = "#container" + featureNumber2; $(NewFeature).stop(false, true).delay(4500).animate({'top' : '0px'}, 3000); var featureNumber3 = featureNumber-1; if ( featureNumber == 1) {featureNumber3 = numberOfFeatures}; var OldFeature = "#container" + featureNumber3; $(OldFeature).stop(false, true).delay(4500).css('top' , '-330px'); setTimeout('if (featureNumber == numberOfFeatures){featureNumber = 1} else {featureNumber++}; ImageRotate2()', 7500)}; Any help would be greatly appreciated!! Thanks, Matt

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  • PyQt WebKit CSS background image not showing

    - by Enfors
    I'm making a Twitter client with PyQt, which uses WebKit to draw the tweet list. Now I'm trying to use CSS to set a background image in the WebKit widget - but the image won't show up. This is the relevant part of the CSS: body { background-image: url("gradient2.jpg"); } The file name is correctly spelled, and it is located in the same directory as the Python program, which is also where I start the program from (so the image file should be in PWD). To check if WebKit somehow looks for the image in the wrong directory anyway, I ran my program through strace, which creates a log of all system calls made by the program. And surprisingly, the name of the image does not appear in the log - so it seems as if WebKit doesn't even try to find it. To verify that my CSS is used at all by WebKit, I tried changing it to a solid background color instead of an image: body { background: #CCFFCC; } And that works. So I know that the CSS is used, that's not the problem. Could it be that WebKit refuses to use "ordinary" files in the filesystem, and that I somehow have to create some sort of "resource" file containing my image in Qt Designer?

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  • UIView coordinate transforms on rotation during keyboard appearance

    - by SG
    iPad app; I'm trying to resize my view when the keyboard appears. It amounts to calling this code at appropriate times: CGRect adjustedFrame = self.frame; adjustedFrame.size.height -= keyboardFrame.size.height; [self setFrame:adjustedFrame]; Using this technique for a view contained in a uisplitview-based app works in all 4 orientations, but I've since discovered that a vanilla uiview-based app does not work. What happens is that apparently the uisplitview is smart enough to convert the coordinates of its subviews (their frame) such that the origin is in the "viewer's top left" regardless of the orientation. However, a uiview is not able to correctly report these coordinates. Though the origin is reported as (0,0) in all orientations, the view's effective origin is always as if the ipad were upright. What is weird about this is that the view correctly rotates and draws, but it always originates in the literal device top left. How can I get the view to correctly make its origin the "top left" to the viewer, not the device's fixed top left? What am I missing? Please, for something so trivial I've spent about 6 hours on this already with every brute force technique and research angle I could think of. This is the original source which doesn't work in this case: http://stackoverflow.com/questions/1951826/move-up-uitoolbar

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  • MSN like box for Ad rotation.

    - by Muhammad Umar Siddique
    Hi Everyone. I want to create a JavaScript based box much like the one found on MSN or AOL with the navigational buttons. Box content must be spider-able by search engines. On MSN you can find the box near top left corner. Note this box contains links and images. Any idea how to implement this ? Thanks.

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  • translation/rotation of a HUD against a camera using vectors in Euclidian 3D space

    - by Jakob
    i've got 2 points in 3D space: the camera position and the camera lookAt. the camera movement is restricted akin to typical first person shooter games. you can move the cam freely, tilt horizontally and up to 90 degrees vertically, but not roll. so now i want to draw a HUD to the screen, on which i can move the mouse freely, with the position of the cursor correctly translating into 3D space. the easy part was to draw something directly in front of the camera. V0 = camPos; V1 = lookAt; V2 = lookAt-camPos; normalize V2; mutiply V2 according to camera frustum V3 = V0+V2 draw something at V3 now the part i don't get: i could use V3 and add to that the rotations of the cam combined with the x/y of the mouse cursor, somehow, right? that's what i want.

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  • Post-loading : check if an image is in the browser cache

    - by Mathieu
    Short version question : Is there navigator.mozIsLocallyAvailable equivalent function that works on all browsers, or an alternative? Long version :) Hi, Here is my situation : I want to implement an HtmlHelper extension for asp.net MVC that handle image post-loading easily (using jQuery). So i render the page with empty image sources with the source specified in the "alt" attribute. I insert image sources after the "window.onload" event, and it works great. I did something like this : $(window).bind('load', function() { var plImages = $(".postLoad"); plImages.each(function() { $(this).attr("src", $(this).attr("alt")); }); }); The problem is : After the first loading, post-loaded images are cached. But if the page takes 10 seconds to load, the cached post-loaded images will be displayed after this 10 seconds. So i think to specify image sources on the "document.ready" event if the image is cached to display them immediatly. I found this function : navigator.mozIsLocallyAvailable to check if an image is in the cache. Here is what I've done with jquery : //specify cached image sources on dom ready $(document).ready(function() { var plImages = $(".postLoad"); plImages.each(function() { var source = $(this).attr("alt") var disponible = navigator.mozIsLocallyAvailable(source, true); if (disponible) $(this).attr("src", source); }); }); //specify uncached image sources after page loading $(window).bind('load', function() { var plImages = $(".postLoad"); plImages.each(function() { if ($(this).attr("src") == "") $(this).attr("src", $(this).attr("alt")); }); }); It works on Mozilla's DOM but it doesn't works on any other one. I tried navigator.isLocallyAvailable : same result. Is there any alternative?

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  • Splitting an image in GWT results in unwanted white space

    - by rancidfishbreath
    I am using GWT 2.03 and am have an image that I want to place partially in an area with a background and partially above a background. I am using a FlexTable to try to accomplish this and have used GIMP to cut the image into two sections. I am trying to load the top part of the image into row 0 and the bottom part of the image into row 1. I set the alignment of the top image to ALIGN_BOTTOM but there is a bit of space at the bottom of cell and so the two parts of the picture don't touch. Here is an image showing what I am talking about. I set the background of the cell to be yellow show where the cell boundaries are. The bottom image and background are rendering correctly. Here is the relevant code snippet: FlexTable table = new FlexTable(); table.setCellSpacing(0); table.setCellPadding(0); table.setBorderWidth(0); FlexCellFormatter formatter = table.getFlexCellFormatter(); table.setWidget(0, 0, topImage); formatter.setStyleName(0, 0, "topImageStyle"); formatter.setVerticalAlignment(0, 0, HasVerticalAlignment.ALIGN_BOTTOM); table.setWidget(1, 0, bottomImage); formatter.setStyleName(1, 0, "bottomImageStyle"); How can I get rid of that space between my image and the cell boundary?

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  • DisplayObject.rotation not matching trig functions

    - by futuraprime
    I'm trying to label an animated pie chart, and I've been having a great deal of trouble getting rotated objects to line up with trigonometrically-positioned objects. So, for example, if I have a pie piece that's middle is angle theta and has been rotated n degrees in a tween, and then I try to position a label with code like this: label.x = center.x + Math.cos((theta + n)/180 * Math.PI) * radius; label.y = center.y + Math.sin((theta + n)/180 * Math.PI) * radius; the label is often not aligned with the center of the pie slice. Since I am also zooming in to the pie chart a great deal, the error becomes significant enough that it occasionally causes the label to miss the pie slice altogether. The error seems relatively unpredictable, and it looks a great deal like a rounding error, but I don't see any obvious rounding going on (the trig functions evaluate to ten or so decimal places, which should be more than enough here). How can I get these labels to position correctly?

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  • Session ID Rotation - does it enhance security?

    - by dound
    (I think) I understand why session IDs should be rotated when the user logs in - this is one important step to prevent session fixation. However, is there any advantage to randomly/periodically rotating session IDs? This seems to only provide a false sense of security in my opinion. Assuming session IDs are not vulnerable to brute-force guessing and you only transmit the session ID in a cookie (not as part of URLs), then an attacker will have to access your cookie (most likely by snooping on your traffic) to get your session ID. Thus if the attacker gets one session ID, they'll probably be able to sniff the rotated session ID too - and thus randomly rotating has not enhanced security.

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  • Using max-width = 100% and max-height = 100% on an image, calculate the display width/height

    - by NatalieMac
    I am creating a slideshow for images of various sizes to display centered vertically and horizontally within a canvas area. In my CSS, I set the width and height of the image to 100% so that each image would proportionally fill the canvas. I want the canvas to auto-size itself to fit within the viewer's screensize as the original size of the images is quite large (up to 800 pixels tall). I am using jQuery 1.4, and using the height of the image to calculate the top value for absolute positioning it to the middle of the canvas. I have tried using jQuery to get the .height(), innerHeight(), and outerHeight(), but it always gets the full size of the image. I extracted the DOM element from the jQuery object and tried using .width, .offsetWidth, and .clientWidth, but that too always seems to return the full size of the image. Firebug displays the correct dimensions, so I know there's some way of calculating the actual display height of the image, I just can't figure out what it is. How do you get the actual display height of an image if you've set max-height = 100%? I didn't want to have to calculate and set the height of each image in the js, but if I have to, I will. It just seems like I should be able to set the canvas size and have the images auto-adjust.

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  • Rotation towards an object in 3d space

    - by retoucher
    hello, i have two coordinates on a 2d plane in 3d space, and am trying to rotate one coordinate (a vector) to face the other coordinate. my vertical axis is the y-axis, so if both of the coordinates are located flat on the 2d plane, they would both have a y-axis of 0, and their x and z coordinates determine their position length/width-wise on the plane. right now, i'm calculating the angle like so (language agnostic): angle = atan2(z2-z1,x2-x1); and am rotating/translating in space like so: pushMatrix(); rotateY(angle); popMatrix(); this doesn't seem to be working though. are my calculations/process correct?

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  • Custom UIView using CALayers disappears after 180º rotation or navigation controller pop

    - by Steve Madsen
    I have a created a custom UIView subclass that is exhibiting some strange behavior. It is a spinning wheel selector, and for performance reasons it is drawn entirely into two CALayer instances. The bottom layer is the wheel itself, which is rotated using setAffineTransform: according to touches. The top layer is eye candy. drawRect: is fairly simple. If the control hasn't been drawn yet (or it's been invalidated), it calls a method that creates the images and assigns them to the layer contents property. - (void) drawRect:(CGRect)rect { if (imageLayer == nil) { [self drawIntoImageLayer]; } [self updateWheelRotation]; } When the view controller using this view first appears, everything is fine. There are two instances where the view completely disappears, however: If the device is rotated a full 180°. After a view controller is popped off the navigation stack and the view becomes visible again. drawRect: is not called either time. Interestingly enough, it IS called after a 90° orientation change, and that causes the view to re-appear. How can I ensure that a custom view using CALayers is redrawn properly in these situations?

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  • Ad/Banner Management/Rotation for Ruby on Rails?

    - by David N. Welton
    Hi, I have a niche site that I'd like to sell banners for directly, rather than going through adsense. I need a system to manage the whole process: displaying ads and an administrative interface to manage them. It doesn't have to be anything terribly fancy, although open source is greatly preferred so that I can grow the system as needs be. Since the site itself is in Rails, I would prefer something for that environment. Googling turns up bunches of them in PHP, but the results are a bit polluted and I didn't have any luck finding one that was done in/for Rails. If I don't find one, I suppose I'll see what I can do to hack together something and release it myself under an open license. Another possibility is this: http://www.google.com/admanager - anyone have anything to say about it? Is it right for someone just selling a few ads for a not-so-big site? Thanks, Dave

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