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How do I find the most “Naturally" direct route using A-star (A*)

- by Greg B

I have implemented the A* algorithm in AS3 and it works great except for one thing. Often the resulting path does not take the most “natural” or smooth route to the target. In my environment the object can move diagonally as inexpensively as it can move horizontally or vertically. Here is a very simple example; the start point is marked by the S, and the end (or finish) point by the F. | | | | | | | | | | |S| | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | |F| | | | | | | | | | | | | | | | | | | | | | | | | | | | | As you can see, during the 1st round of finding, nodes [0,2], [1,2], [2,2] will all be added to the list of possible node as they all have a score of N. The issue I’m having comes at the next point when I’m trying to decide which node to proceed with. In the example above I am using possibleNodes[0] to choose the next node. If I change this to possibleNodes[possibleNodes.length-1] I get the following path. | | | | | | | | | | |S| | | | | | | | | | |x| | | | | | | | | | |x| | | | | | | | | | |x| | | | | | | | |x| | | | | | | | |x| | | | | | | | |F| | | | | | | | | | | | | | | | | | | | | | | | | | | | | And then with possibleNextNodes[Math.round(possibleNextNodes.length / 2)-1] | | | | | | | | | | |S| | | | | | | | | |x| | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | x| | | | | | | | | | |F| | | | | | | | | | | | | | | | | | | | | | | | | | | | | All these paths have the same cost as they all contain the same number of steps but, in this situation, the most sensible path would be as follows... | | | | | | | | | | |S| | | | | | | | | |x| | | | | | | | | |x| | | | | | | | | |x| | | | | | | | | |x| | | | | | | | | |x| | | | | | | | | |F| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Is there a formally accepted method of making the path appear more sensible rather than just mathematically correct?

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iPhone UITableView stutters with custom cells. How can I get it to scroll smoothly?

- by Charles S.

I'm using a UITableView to display custom cells created with Interface Builder. The table scrolling isn't very smooth (it "stutters") which leaves me to believe cells aren't being reused. Is there something wrong with this code? - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"TwitterCell"; TwitterCell *cell = (TwitterCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ //new cell NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"TwitterCell" owner:nil options:nil]; for(id currentObject in topLevelObjects) { if([currentObject isKindOfClass:[TwitterCell class]]) { cell = (TwitterCell *)currentObject; break; } } } if([self.tweets count] > 0) { cell.lblUser.text = [[self.tweets objectAtIndex:[indexPath row]] username]; cell.lblTime.text = [[self.tweets objectAtIndex:[indexPath row]] time]; [cell.txtText setText:[[self.tweets objectAtIndex:[indexPath row]] text]]; [[cell imgImage] setImage:[[self.tweets objectAtIndex:[indexPath row]] image]]; } else { cell.txtText.text = @"Loading..."; } cell.selectionStyle = UITableViewCellSelectionStyleNone; return cell; }

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web browser become slow or no response after several ajax calls

- by Patrick

I'm totally newbie to jquery and ajax, my recently project is to help the representatives (reps) to manage customer quotations online. I have a page which displays all the quotations in a big table. I've managed to use ajax to fetch and display the quotations which associate to a particular rep after i click that rep's name. But the only problem is the speed of response. The first few clicks are ok and very smooth. But after several tries, the response become slow and I cant even scroll down the webpage, and later on the web browser craches.... Please have a look at my ajax code. here it is:  <script type="text/javascript"> //<![CDATA[ $(function(){ $("a.repID").click(function(){ $('div#loader').append("<p align='center'><img src='images/loadingbar2.gif' id='loading' /></p>"); var repID = $(this).attr("title"); $.ajax({ type:'POST', url:'quote_info.php', data:'repID=' + repID, cache: false, success:function(data) { $("#container").html('<div id="content">' + data + '</div>'); $("#loading").fadeOut(500, function() {$(this).remove();}); $("#sortme").tablesorter(); $('.tbl').fixedtableheader(); } }); return false; }); }); </script> 

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Frameset isn't working in IE

- by Cameroon

First of all, why use a frame set in the first place you ask? answer: Because my boss told me. That been said, I have 2 files. Index.html and Head.html. Contents of index.html: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/frameset.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" /> <title>Site Title</title> </head> <frameset rows="122,*" FRAMEBORDER=NO FRAMESPACING=2 BORDER=0> <frame name="t" src="head.html" scrolling="no" marginheight="0" marginwidth="0"> <frame name="b" src="http://www.website.com"> </frameset> <noframes> <p>You have frames turned off on your browser, please turn it on and reload this page.</p> </noframes> </html> Contents of head.html: <div style="border-bottom:2px solid #000;height:120px"> <center>This is the frame head.</center> </div> The code works fine in all browsers except Internet Explorer 7 and 8 (I don't care about 6). Is there anything I am doing wrong, and if not then can the same effect be achieved without frames and if so how?

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Programmatically talking to a Serial Port in OS X or Linux

- by deadprogrammer

I have a Prolite LED sign that I like to set up to show scrolling search queries from a apache logs and other fun statistics. The problem is, my G5 does not have a serial port, so I have to use a usb to serial dongle. It shows up as /dev/cu.usbserial and /dev/tty.usbserial . When i do this everything seems to be hunky-dory: stty -f /dev/cu.usbserial speed 9600 baud; lflags: -icanon -isig -iexten -echo iflags: -icrnl -ixon -ixany -imaxbel -brkint oflags: -opost -onlcr -oxtabs cflags: cs8 -parenb Everything also works when I use the serial port tool to talk to it. If I run this piece of code while the above mentioned serial port tool, everthing also works. But as soon as I disconnect the tool the connection gets lost. #!/usr/bin/python import serial ser = serial.Serial('/dev/cu.usbserial', 9600, timeout=10) ser.write("<ID01><PA> \r\n") read_chars = ser.read(20) print read_chars ser.close() So the question is, what magicks do I need to perform to start talking to the serial port without the serial port tool? Is that a permissions problem? Also, what's the difference between /dev/cu.usbserial and /dev/tty.usbserial?

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Stackpanel add item animation

- by grzegorz_p

Hello, I've been struggling a while with marquee-style image scrolling control. At a moment, I stuck up with templated ItemsControl: <Window.Resources> <DataTemplate x:Key="itemsTemplate"> <Image Source="{Binding AbsolutePath}"></Image> </DataTemplate> </Window.Resources> <ItemsControl ItemTemplate="{StaticResource itemsTemplate}" x:Name="ic" ItemsSource="{Binding ElementName=mainWindow, Path=DataItems}" VirtualizingStackPanel.IsVirtualizing="True"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <VirtualizingStackPanel Orientation="Vertical" VerticalAlignment="Bottom" VirtualizingStackPanel.IsVirtualizing="True" > </VirtualizingStackPanel> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> ItemsControl is bound to ObservableCollection, so I can add items at runtime. As soon as item goes off-screen it's removed from ObservableCollection. The last thing to do is implementing custom item add behavior (smooth slide-in instead of insert-translateothers behavior). Shall I derive from StackPanel to achieve such effect or just perform DoubleAnimation on currently adding item? Any suggestions appreciated.

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Rails 3 with Ruby 1.9.1 on Heroku

- by stephen murdoch

I've decided that I am going to man-up and start using Rails 3 from now on but the following note found here puts me off a bit: Note that Ruby 1.8.7 has marshaling bugs that crash both Rails 2.3.x and Rails 3.0.0. Ruby 1.9.1 outright segfaults on Rails 3.0.0, so if you want to use Rails 3 with 1.9.x, jump on 1.9.2 trunk for smooth sailing. I use Heroku for my deployment and as far as I am aware they do not plan to add 1.9.2 to the stack until it's stable (which might be in August) so I was thinking of doing it with 1.9.1. and seeing what happens. I know that there is a 3rd beta release now but the comments on the blog imply that it's still a little bit buggy. Is DHH inferring that you shouldn't touch Rails 3 at all if you are on 1.9.1? What are other Heroku-ists doing regarding Rails 3? Anyone using it for any production apps? I guess I'll only know once I've tried but any advice would be nice.

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Why can't I fade out this table row in IE using jQuery?

- by George Edison

I can't get the table row to fade out in IE. It works in Chrome, but not IE. It just becomes really 'light' and stays on the screen. I tried IE8 with and without compatibility mode. <html> <head> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> function hideIt() { $('#hideme').fadeTo("slow", 0.0); } </script> </head> <body> <table> <tr id='hideme'> <td>Hide me!</td> </tr> </table> <button onclick='hideIt();'>Hide</button> </body> </html> Is there a workaround/solution for a smooth fade?

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CSS / jQuery Vertically and Horizontally Center DIV

- by aherrick

I'm trying to vertically and horizontally center this div even when there is content to scroll and the user is scrolling down the page. The following test works fine in IE, but in Firefox I get a weird flickering affect when hovering over the thumbnail image. Any thoughts? <html> <head> <title>aj</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript"> $(function() { // img preview $('.img').hover(function() { if (!$('#overlay').length) { $('<div id="overlay"/>').css({ position: 'fixed', top: 0, left: 0, width: '100%', zIndex: 100, height: $(window).height() + 'px' }).appendTo('body'); $('<div id="item" />').css({ border: '7px solid #999', height: '500px', width: '500px', top: '50%', left: '50%', position: 'absolute', marginTop: '-250px', marginLeft: '-250px' }).append('<img src="' + $(this).attr('rel') + '" alt="img" />').appendTo('#overlay'); } }, function() { $('#overlay').remove(); }); }); </script> </head> <body> <img class="img" src="http://ajondeck.net/temp/paperboy_thumb.gif" rel="http://ajondeck.net/temp/paperboy.gif" alt="image" /> </body> </html>

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Autocomplete and IE7 - slowness, sluggishness as overall pagesize grows?

- by wchrisjohnson

Hi, I have the autocomplete plugin (http://bassistance.de/jquery-plugins/jquery-plugin-autocomplete/, version 1.1 and 1.0.2) on a project to add pieces of "equipment" to a "project". On a fresh project the plugin works great; the data returned from the database comes back FAST, you can scroll the list fast, and can select an item and move on to the next one. Once I have a project established with equipment on it, and I go to add equipment, the performance is pretty bad. It takes 4-5 seconds to get the list of data back from the server, scrolling the list is painful, and the cursor takes several seconds to settle on an item. Repainting the page after the list goes away is slow. This is occurring in IE7, latest version. FF3 and Chrome are fine, very snappy. The pagesize is about 40K overall. I'm thinking this is an issue with the IE7 Javascript engine, or an edge case with this plugin and IE7; it works quickly enough in FF3+. I would appreciate any ideas, solutions, known issues, or thoughts on how to more specifically pin this down. I'd love to post sample code, but this is a corporate app, and I'm not how useful it would be given that the server side piece cannot be shown; ie: you can't pull it down and test it like a self contained piece of code.. Thanks in advance! Chris

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Cannot capture TouchEvent.UP in Blackberry

- by Nandu

I am working on a Scrollable Image field.I am handling TouchEvent.DOWN mTouchEvent.MOVE,TouchEvent.UP. Somehow control never goes to TouchEvent.UP section.How to capture the UP event. I have to findout the start and end points of the drag. My Code looks like this.. if (event == TouchEvent.DOWN && touchEvent.isValid()) { _xTouch = touchEvent.getX(1); _yTouch = touchEvent.getY(1); } else if(event == TouchEvent.UP && touchEvent.isValid()) { int x = touchEvent.getX(1); int y = touchEvent.getY(1); } else if (event == TouchEvent.MOVE && touchEvent.isValid()) { boolean result = scrollImage((touchEvent.getX(1) - _xTouch), (touchEvent.getY(1) - _yTouch)); _xTouch = touchEvent.getX(1); _yTouch = touchEvent.getY(1); //If scrolling occurred, consume the touch event. if (result) { return true; } else { return false; } } Thanks in advance.

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Grouped UITableView Footer Sometimes Hidden On Quick Scroll

- by jdandrea

OK, this one is a puzzler. There is one similar post but it's not similar enough to count, so I'm posting this one. :) I've got a grouped UITableView with a header and footer. The footer includes two UIButton views, side-by-side. Nothing major. Now … there is a toggle button in a UIToolbar at the bottom for more/less info in this table view. So I build my index paths to delete/insert with fade row animation, all the usual ingredients, sandwiched between beginUpdates and endUpdates calls on the UITableView … and this works fine! In also happens that my footer can sometimes be pushed off past the bottom of the display. Here's where it gets weird. If I drag my finger up the display, scrolling the view upward, I should see that footer eventually, right? Well … most of the time I do. BUT, if I flick my finger up, for a faster scroll, the footer is missing. Even if you try to tap in that area - no response. However, if I scroll back down again, just to hide that footer (or rather hide the area where the footer would normally be), and then scroll back up, it's there once again! This only happens when inserting rows. If I delete rows, the footer stays put … unless of course it was already hidden and I didn't perform the aforementioned incantation to get it back. :) I am trying to trace through this, but to no avail. I suppose tracing through scroll operations is a bit of a crazy proposition! Perhaps some creative logging … suggestions, anyone? Or is this a known issue in 3.1 where row insert/deletes are concerned? (I don't recall seeing it until 3.1.)

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jQuery scrollTo plugin to scroll screen to div wouldn't work, why?

- by Michael Mao

Hi all: I am working on a web application, whose mock-up page can now be found at: our server If you click on the blue title "step1" and then choose the option of "delivery to address", a form will show up using jQuery ajax load. No problem for this. Click on the "venue" radio button will take you to another form, no problem for this as well. If you scroll down a bit, you can see a textarea, top of that you can see a link called "what's this?". Click on it and the textarea shall be filled with sample words. The problem is, after clicking on the link, the webpage automatically scrolls to the top section. What I want is to keep the textarea to the center of screen after link is clicked. I am trying to use a jQuery plugin called "scrollTo", which can be found here From its demo page I can tell is what I want. And here is my code to try using it: function reloadDeliveryForm() { $('#deliveryForm').load('./ajax/deliveryToVenueForm.html', function(response, status, xhr) { if (status == "error") { $.prompt("Sorry but there was an error, please try again.<br />" + "If same error persists, please report to webmaster."); } else //deliveryForm loaded successfully { validateDeliveryForm(); $("#delivery_special").elastic(); $('#special_conditions_tip').click(function() { console.log("start filling"); fillTextareaWithExample(); console.log("end filling"); $.scrollTo('#delivery_special'); console.log("end scrolling"); }); } }); } From Firebug output I can tell the scrollTo function is called, but doesn't work. I've switched jQuery back to version 1.3.2, which is used on the demo page of the plugin, but that wouldn't help, either. Is there a problem with my coding? Which technique would you use to resolve this problem? Any suggestion is much appreciated.

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C# Help with a basic pedagogic example of a BackGroundWorker process populating a DataGridView

- by Roger

Scenario: I have a windows form that holds a DataGridWiew with 3 pre-defined columns. I have 3 variables declared outside the function and assigned to inside the function. I have a function that enumerates stuff and puts it in the 3 columns, line by line: string VARIABLE1; string VARIABLE2; string VARIABLE3; private void FunctionEnumerateStuff() { foreach (StuffObject STUFF in StuffCollection) { VARIABLE1 = STUFF.SubStuff1.ToString(); VARIABLE2 = STUFF.SubStuff2.ToString(); VARIABLE3 = STUFF.SubStuff3.ToString(); DatagridWiew1.Rows.Add(VALUE1, VALUE2, VALUE3); } } What I want to do, is to execute this function from a BackGroundWorker process, so that the GUI of the application will be smooth and responsive. I have read up on backgroundworkers but I am having trouble relating, because all examples seems to be of entirely different scenarios and most of them are overwelmingly complex. San some helpful pedagogic soul help me and others with a very basic example of how to get this to work in the simplest way possible. Thanks.

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Auto-resize custom horizontal scrollbar/slider?

I'm working on a site that scrolls horizontally. I know very little about jQuery and prototype and I got this slider script working as the page scrollbar. When the window is resized smaller, the custom horizontal slider/scrollbar won't resize to the viewport's width. I have the page and js files here http://keanetix.co.cc/scrollpage/ Try to resize the browser and you'll notice the custom scrollbar extending to the right. The custom scrollbar wont fit on the viewport, unless you refresh the page when it's been resized. Can somebody help me with this? Thanks. This is the code in the HTML page: <script type="text/javascript" language="javascript"> // <![CDATA[ // horizontal slider control var slider2 = new Control.Slider('handle', 'track', { onSlide: function(v) { scrollHorizontal(v, $('scrollable'), slider2); }, onChange: function(v) { scrollHorizontal(v, $('scrollable'), slider2); } }); // scroll the element horizontally based on its width and the slider maximum value function scrollHorizontal(value, element, slider) { element.scrollLeft = Math.round(value/slider.maximum*(element.scrollWidth-element.offsetWidth)); } // disable horizontal scrolling if text doesn't overflow the div if ($('scrollable').scrollWidth <= $('scrollable').offsetWidth) { slider2.setDisabled(); $('track').hide(); } // ]]> </script>

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Enable cross app redirects

- by Gogster

Hi all, We have load balancing set up on out two web server, however, a few users are being asked to login when they are being re-directed to a particular server to upload a document (we are trying to keep all uploaded documents on one server only), here is the code from web.config: <authentication mode="Forms"> <forms name="EAAAuthCookie" loginUrl="/login" defaultUrl="/members/home" protection="All" path="/" timeout="60000" slidingExpiration="true" enableCrossAppRedirects="true" /> </authentication> <machineKey decryption="AES" validation="SHA1" decryptionKey="7B4EC5B0C83631DF25D5B179EDDBF91B1C175B81C6F52102267D3D097FBF272A" validationKey="7D1F50788629CC342EE4985D85DE3D14F10654695912C0FFD439F54BED64F76A57A2D5E8180BC6FF052E0385C30558F5527D6C197C577A7F32DD8FF1CAC9F794" /> Here is the transfer code to the upload form: $('#addReport').click(function() { if ($.cookie('TransferURL') != '') { $("#iframeUploadReport").attr('src', $.cookie('TransferURL')); }; $('#overlay').fadeIn('slow'); }); <script type="text/C#" runat="server"> void Page_Load() { string cookieName = FormsAuthentication.FormsCookieName; string userName = Request.Cookies["HiddenUsername"].ToString(); string cookieValue = FormsAuthentication.GetAuthCookie(userName, false).Value; Response.Cookies["TransferURL"].Value = "http://eaa.cms.necinteractive.net/members/media-upload" + String.Format("?{0}={1}", cookieName, cookieValue); } </script> <iframe id="iframeUploadReport" src="http://eaa.cms.necinteractive.net/members/media-upload" width="500px" height="336px" frameborder="0" scrolling="no"></iframe> Can you see any obvious step we are missing? Thanks

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Layering Cocoa WebView - Drawing on top?

- by Josh

http://stackoverflow.com/questions/1618498/webview-in-core-animation-layer The only other thread I can find is the above which doesn't necessarily fit my needs. Is there a reliable way to simply draw a view on top of a webview? I've tried to layer a regular NSView on top of WebView, and it draws right at first, but any movement in the webview (scrolling the page etc) appears to invalidate the view and produces visual artifacts. I've tried: [[[NSApp mainWindow] contentView] addSubview:view positioned:NSWindowAbove relativeTo:webView]; No luck there, same problems -- z-ordering doesn't seem to work unless I'm missing something. Is this just a limitation of webviews? I also tried implementing the view above as a window, which worked much better (just controlled the location of the window programmatically). However, the desired behavior is for the user to enter some text into this window, but for it not to steal "focus" -- ie the main window goes inactive (the x - + go gray) when the user clicks on the text field in the new window. Any way to avoid that? I've tried subclassing NSWindow and overriding canBecomeKey (return YES) and canBecomeMain (return NO) but the window still steals focus. Josh

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iPhone: objc_class_name_TTTabStrip symbol not found build error

- by user187532

Hello friends, I am trying to implement 'scrollview' effect in 'Tabbar' which has 'TabItems'. I found that the good example is from 'facebook' open source 'TTCatlog' project 'Tabs' section. So i included all the source from it to my project and trying to build it. I have followed the following links to go ahead on this: http://stackoverflow.com/questions/822792/how-to-create-a-horizontal-scrolling-view-on-iphone source: http://github.com/facebook/three20/tree/master/samples/ My calling code is like below: _tabBar1 = [[TTTabStrip alloc] initWithFrame:CGRectMake(10, 68, 300, 28)]; _tabBar1.tabItems = [NSArray arrayWithObjects: [[[TTTabItem alloc] initWithTitle:@"Item 1"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 2"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 3"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 4"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 5"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 6"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 7"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 8"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 9"] autorelease], [[[TTTabItem alloc] initWithTitle:@"Item 10"] autorelease], nil]; [self.navigationController.view addSubview:_tabBar1]; My project folder as like below: ..../iphone/MyProgram/MyProgram.xcodeproj ..../iphone/Three20/src/Three20.... In my project settings for header search path, I have ../Three20/src But when i try to build it, it throws the following error: "objc_class_name_TTTabStrip symbol not found" "objc_class_name_TTTabItem symbol not found" I see there, all these files (.h and .m) are availbale there. Could someone please help what's wrong there and how do i get rid of this issue and continue working with it?

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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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IE8 (compatibility mode) won't load my Ajax content

- by Jens Roland

Hi all - I am working on a jQuery script on http://www.qxl.dk/ and I can't seem to get IE7 (or more accurately, IE8 in IE7 compatibility mode) to load my content. The sidebar box on the right named "QXL Aktuelt" loads its HTML content from an external file using Ajax load(), then triggers a custom jQuery event ("aktuelt_loaded") that starts a carousel script (like a scrolling newsticker). Several other content sections on the same page are loaded through Ajax and they work just fine, so I'm wondering what's going wrong. Everything works as expected in Firefox 3.6 and IE8, but not in IE8's compatibility mode. The script that loads the Ajax content is (inline on the page): <div id="qxlaktueltHolder"></div> <script type="text/javascript"> $("#qxlaktueltHolder").load("/contents/dk/modul/qxlaktuelt/qxlaktuelt.htm", function() { $("#qxlaktueltHolder").trigger("qxlaktuelt_loaded", []); }); </script> <script type='text/javascript' src='http://www.qxl.dk/contents/dk/js/jcarousellite_1.0.1.min.js'></script> <script type='text/javascript' src='http://www.qxl.dk/contents/dk/js/qxlaktuelt_liveload.js'></script> The external script that responds to the event is in the following file: http://www.qxl.dk/contents/dk/js/qxlaktuelt_liveload.js All ideas are very welcome.

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Flex 3 - Saving an image of a component

- by Emma

Im currently trying to work the imageSnapshot function in flex. Ive been looking hard but I cant seem to find a solution to my problem. I wish to take a screenshot of one of my components, to capture the final output of my program, since a plain "printscreen" cuts off some of the output due to it scrolling. My current code looks like - <mx:ApplicationControlBar dock="true"> <mx:Button label="Take snapshot of Profile" click="takeSnapshot();" /> </mx:ApplicationControlBar> Which when called does - private function takeSnapshot(even:Event=null):void { var imageSnap:ImageSnapshot = ImageSnapshot.captureImage(viewstack1); Now i think this is taking the image of the viewstack which I want... But Im stumped on what to do from here! Is it not possible to now just copy the image to the clipboard, or produce a new window in my browser with the entire image inside? If anyone has any other way to do this, suggestions would be wonderful. Thank you for your time.

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Dragging an UIView inside UIScrollView

- by Sergey Mikhanov

Hello community! I am trying to solve a basic problem with drag and drop on iPhone. Here's my setup: I have a UIScrollView which has one large content subview (I'm able to scroll and zoom it) Content subview has several small tiles as subviews that should be dragged around inside it. My UIScrollView subclass has this method: - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { UIView *tile = [contentView pointInsideTiles:[self convertPoint:point toView:contentView] withEvent:event]; if (tile) { return tile; } else { return [super hitTest:point withEvent:event]; } } Content subview has this method: - (UIView *)pointInsideTiles:(CGPoint)point withEvent:(UIEvent *)event { for (TileView *tile in tiles) { if ([tile pointInside:[self convertPoint:point toView:tile] withEvent:event]) return tile; } return nil; } And tile view has this method: - (void)touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event { UITouch *touch = [touches anyObject]; CGPoint location = [touch locationInView:self.superview]; self.center = location; } This works, but not fully correct: the tile sometimes "falls down" during the drag process. More precisely, it stops receiving touchesMoved: invocations, and scroll view starts scrolling instead. I noticed that this depends on the drag speed: the faster I drag, the quicker the tile "falls". Any ideas on how to keep the tile glued to the dragging finger? Thanks in advance!

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Obtaining touch location for a uiscrollview touch

- by LOSnively

I have a uiscrollview as an element of a uiscrollviewcontroller, along with other view objects. The image scrolls and zooms as expected, when the scrollView is the top subview. However, I also need to get the screen location of the touch, in particular when there is no scroll action. (I understand the location may change during a scroll, but that's not important.) I haven't found a way to do that. In the scrollviewcontroller implementation I have customized all of the standard methods that should do this: "touchesShouldBegin...", "touchesBegan:...", "touchesEnded:...", and so on. As far as I can tell, none of these are being called during a touch event when the scrollView is the top subview. I've tried setting the delayContentTouches property to both YES and NO, and that doesn't seem to make a difference. As an alternative, I've tried putting a UIView as the top subview and then tried passing the touches to the now underlying scrollView. In this configuration, the standard methods are called and I can get the touch location, but I haven't found a mechanism for the touches to be passed to the scrollView so scrolling occurs. Doing something like sending the touch messages to the specific scrollView, or to "super" or just sending them to nextResponder doesn't do it. It seems I can make the scroll work or find the location of the touch but not both, depending on what the "top" subview is. I suspect this is trivial, but after two weeks of struggling, it's time to eat my embarrassment for not being able to do this seemingly simplest of things. I've read all of the related questions here on stackoverflow, tried most if not all of the suggestions, and so far, nothing has worked. I've looked through the various links and references suggested by the answers, including Apple's documentation, but none have pointed out the gap in my understanding. Any ideas would be appreciated.

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passive view and display logic

- by genesys

Hi! In MVC and MVP and similar patterns there's often the approach of the "passive view" which is as stupid as possible. This should facilitate unit testing and create a clearer separation of view and model. I know that those patterns come in very different flavours and especially the understanding of MVP seems to differ from article to article. Therefore my question is not "how do i implement this pattern correctly". I want to improve view and model separation and go for better testability of the application. Therefore i'd like to go for a passive view. But my question is, where would you put logic that is clearly only view related? like a textviewer should scroll the text when the scrollbar is moved. would you put the logic for this into the Presenter? Let's say the textviewer has some extended functionality. like setting markings on textpassages. The logic for this makes clearly sense to be put into the Presenter. However, if it is mixed with all the 'direct' logic of the view (like scrolling the text) the Presenter could become very big, which is also not really a nice design. So my question is where to put display related logic of a passive view and what functionallity to mix in the Presenter. Thanks!

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How to make a small flash swf with ComboBox in Actionscript 3?

- by Sint

I have a pure Actionscript 3 project, using flash.* libraries, compiles down to about 6k (using mxmlc). Program handles about 1k shapes, a few sprites, a sockets connection, works great (tastes less filling). Now, how would I add a ComboBox control without incurring excessive bloat? More specificially, I would like to keep the size under 100k. So far I have tried: Adobe mx.controls ComboBoxexample - simple mxml example compiles to 200+k both on my main Linux Box using mxmlc and in Windows using Flash Builder 4 Yahoo Astra - uses mx libraries underneath(so as bloated as Adobe?), plus does not contain exact ComboBox Keith Peter's MinimalComps - seems small, but far from providing ComboBox functionality SPAS (Swing Package for Actionscript) - compiles to 130k, but alpha version of ComboBox does not let me adjust height... asuilib - compiles to 40k, unfortunately this ComboBox does not provide for scrolling items...if it does not fit on screen no way to scroll to it Now my questions: Is there a way to lower size for projects importing mx.controls ? Maybe there is a way to fix SPAS or asuilib ComboBoxes? Perhaps, there are some other libraries which provide a ComboBox(or DropList)?

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