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• getimagesize on alfresco image

  - by SupFrig

  i'm working on a front display for an alfresco filled with pictures. i'm building my pictures url like this : http://myHost.com:8080/share/proxy/alfresco-noauth/api/node/content/workspace/SpacesStore/bf0a8b21-b8d9-487d-a529-dee8c49d7c6f/filetitle.jpg?alf_ticket=myTicket where myHost is the server and myTicket is the ticket generated at this url : http://myHost.com:8080/alfresco/service/api/login?u=login&pw=password Picture is displaying correctly with this url, but i want to use phpthumb to resize it, and when i try to use it on my picture, i get an http 500 error on the script and the following log : PHP Warning: getimagesize(http://myHost.com:8080/share/proxy/alfresco-noauth/api/node/content/workspace/SpacesStore/bf0a8b21-b8d9-487d-a529-dee8c49d7c6f/filetitle.jpg?alf_ticket=myTicket): failed to open stream: HTTP request failed! HTTP/1.1 401 Non-Autorisé I shouldn't hit the authentification, since my link has a valid ticket (I don't hit authentification when i display normally my picture)

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• Possible to InvalidateVisual() on a given region instead of entire WPF control?

  - by Scott Bilas

  I have a complex WPF control that draws a lot of primitives in its OnRender (it's sort of like a map). When a small portion of it changes, I'd only like to re-issue render commands for the affected elements, instead of running the entire OnRender over. While I'm fine with my OnRender function's performance on a resize or whatever, it's not fast enough for mouse hover-based highlighting of primitives. Currently the only way I know how to force a screen update is to call InvalidateVisual(). No way to send in a dirty rect region to invalidate. Is the lowest granularity of WPF screen composition the UI element? Will I need to do my renders of primitives into an intermediate target and then have that use InvalidateVisual() to update to the screen?

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• How do I send a client-event asynchronously to a GtkWidget?

  - by fret

  I'm trying to send and receive a client-event using a GtkWidget on the win32 platform. The sending code looks like this: GtkWidget *Wnd; GdkNativeWindow Hnd = #ifdef WIN32 GDK_WINDOW_HWND(Wnd->window); #else GDK_WINDOW_XWINDOW(Wnd->window); #endif GdkEvent *Event = gdk_event_new(GDK_CLIENT_EVENT); // fill out Event params gdk_event_send_client_message(Event, Hnd); Receiving code looks like this: static gboolean MyClientEvent(GtkWidget *widget, GdkEventClient *ev, MyWnd *Wnd) { // breakpoint here... return TRUE; } GtkWidget *Wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL); g_signal_connect( G_OBJECT(Wnd), "client-event", G_CALLBACK(MyClientEvent), this); gtk_widget_add_events(Wnd, GDK_ALL_EVENTS_MASK); I used Spy++ to see the message getting sent, so I know the sending side is ok. The receiving side however doesn't get the client-event. I was expecting my breakpoint in the callback to trigger... but it doesn't. I'm not even sure if a GtkWindow can receive a client-event... from past experience on X11 I thought it was pretty much the same as any other GtkWidget in that respect. Maybe on the win32 platform it's kinda different. But still I'd like to be able to get this working. I would like this to work with asynchronously, and in a thread-safe fashion, so that I can send events from worker threads up to the GUI thread.

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• Including partial views when applying the Mode-View-ViewModel design pattern

  - by Filip Ekberg

  Consider that I have an application that just handles Messages and Users I want my Window to have a common Menu and an area where the current View is displayed. I can only work with either Messages or Users so I cannot work simultaniously with both Views. Therefore I have the following Controls MessageView.xaml UserView.xaml Just to make it a bit easier, both the Message Model and the User Model looks like this: Name Description Now, I have the following three ViewModels: MainWindowViewModel UsersViewModel MessagesViewModel The UsersViewModel and the MessagesViewModel both just fetch an ObserverableCollection<T> of its regarding Model which is bound in the corresponding View like this: <DataGrid ItemSource="{Binding ModelCollection}" /> The MainWindowViewModel hooks up two different Commands that have implemented ICommand that looks something like the following: public class ShowMessagesCommand : ICommand { private ViewModelBase ViewModel { get; set; } public ShowMessagesCommand (ViewModelBase viewModel) { ViewModel = viewModel; } public void Execute(object parameter) { var viewModel = new ProductsViewModel(); ViewModel.PartialViewModel = new MessageView { DataContext = viewModel }; } public bool CanExecute(object parameter) { return true; } public event EventHandler CanExecuteChanged; } And there is another one a like it that will show Users. Now this introduced ViewModelBase which only holds the following: public UIElement PartialViewModel { get { return (UIElement)GetValue(PartialViewModelProperty); } set { SetValue(PartialViewModelProperty, value); } } public static readonly DependencyProperty PartialViewModelProperty = DependencyProperty.Register("PartialViewModel", typeof(UIElement), typeof(ViewModelBase), new UIPropertyMetadata(null)); This dependency property is used in the MainWindow.xaml to display the User Control dynamicly like this: <UserControl Content="{Binding PartialViewModel}" /> There are also two buttons on this Window that fires the Commands: ShowMessagesCommand ShowUsersCommand And when these are fired, the UserControl changes because PartialViewModel is a dependency property. I want to know if this is bad practice? Should I not inject the User Control like this? Is there another "better" alternative that corresponds better with the design pattern? Or is this a nice way of including partial views?

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• Dockable panes created in CChildFrame not visible the second time the app. starts.

  - by Nijenhuis

  Hi, I have created some dockable panes in CChildFrame::OnCreate() The first time i start the application they are shown. The second time i start the application they are created but the splitterwindows are completly against the sides of the clients area (bottom and right), so not visible. So i have to use the mouse to pull the splitters into the clientarea so that the dockable windows become visible again. If i do File-New in my app a new client window is created and showing the dockable windows as they should be. I Think this has something to do with saving the windows layout in the registry, because if i change SetRegistryKey(_T("61sakjgsajkdg")); in the CWinApp derived class of my app. and rerun they are shown again the first time. (but not the second time i restart the app). How can i save the layout of those dockable windows as well, so if i restart my app. they are visible ? Or else how do i prevent my app. of overwritting the window layout with the one previously saved. Something to do with LoadCustomState() and SaveCustomState() ?, i could no find any info on howto implement those methods. I have here a link to the demo project to demonstrate what i mean: http://www.4shared.com/file/237193472/c384f0f6/GUI60.html Could someone tell me how to show those dockable windows in my CChildFrame class the second time the app starts?

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• css layout for footer at bottom with dynamic ajax content changing height of page

  - by m42

  [Update] I actually compromised on this problem for now by foregoing the fixed footer design. It seems that there is no problem with dynamic content moving the footer and resizing containers appropriately unless the footer is fixed to the browser bottom initially. I hope others will eventually provide a great solution that encompasses the best of both worlds. I spent all day trying to get the footer to move down the page to accommodate dynamically added (via ajax) content. I really need some pointers or links because I haven't found anything that helps. Basically: My site has some pages that begin with only a text box and a button so that the total height of the content area is only a few inches beneath the header area. I don't have any problem getting the sticky footer working so that the footer appears at the bottom of the browser window even when there is very little content on screen. That same css layout works fine for other pages that have content that extends beneath the browser window. The catch: The content has to be rendered and passed to the browser with the initial load. The Problem: Any content that is added to the page via AJAX after the initial load paints down the page correctly -- but the footer remains in its initial location. Please tell me there is a fix for this. I can't post the css until checking with my boss first - if possible - and if needed, I will later - but it's just a very basic version of the many sticky footer css solutions floating around the web. Thanks.

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• Scale GraphicsPaths

  - by serhio

  In a form I draw a graph. This graph has some distinct paths that should have differently drawn. Say AxesPath, SalesPath, CostsPath etc... When I resize the form need I to scale every of components Paths? Take an example: Imports System.Drawing.Drawing2D Public Class Form1 Dim lineOne As GraphicsPath Dim lineTwo As GraphicsPath Dim allPaths As GraphicsPath Dim initSize As Size Public Sub New() ' This call is required by the designer. ' InitializeComponent() initSize = Me.Size lineOne = New GraphicsPath() lineTwo = New GraphicsPath() lineOne.AddLine(20.0F, 20.0F, Me.initSize.Width - 20.0F, 20.0F) lineTwo.AddLine(0.1F, 10.0F, Me.initSize.Width - 20.0F, _ Me.initSize.Height - 0.5F) allPaths = New GraphicsPath() allPaths.AddPath(lineOne, False) allPaths.AddPath(lineTwo, False) Me.ResizeRedraw = True End Sub Protected Overrides Sub OnResize(ByVal e As System.EventArgs) MyBase.OnResize(e) Dim m As New Matrix m.Scale(Me.Width / initSize.Width, Me.Height / initSize.Height) allPaths.Transform(m) initSize = Me.Size End Sub Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) MyBase.OnPaint(e) ' WORKS ' ' e.Graphics.DrawPath(Pens.GreenYellow, allPaths) ' ' DOES NOT WORK! ' e.Graphics.DrawPath(Pens.DarkGoldenrod, lineOne) e.Graphics.DrawPath(Pens.DarkMagenta, lineTwo) End Sub End Class

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• WPF : Command routing for Keyboard shortcuts.

  - by Sprotty

  Basically I want to create a keyboard shortcut which is valid within the scope of a window, and not just enabled when focus is within the control that binds it. in more detail.... I have a window which has 3 controls a toolbar textbox Custom Control The toolbar has a button bound to the Command CustomCommands.CmdA and linked to 'Ctrl-T'. My Custom Control can process CmdA. When I run the app and click on my custom control CmdA is enabled and works fine. Also Ctrl-T cause the command to fire. However when I select the text box, my custom command CmdA becomes disabled. I can rectify this by setting the command target for CmdA's button. Now when I select the textBox, CmdA is still enabled. But the Keyboard shortcut Ctrl-T does nothing. Is there any easy way to change the scope of keyboard shortcuts? Or do I need to catch the keypress somewhere lower down, and work out which Command it relates to and route it myself (if so is there a framework within which to do this?) Many Thanks Simon

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• Safari/Chrome (Webkit) - Cannot hide iframe vertical scrollbar

  - by BrainCore

  Hello, I have an iframe on www.mydomain.com that points to support.mydomain.com (which is a CNAME to a foreign domain). I automatically resize the height of my iframe so that the frame will not need any scrollbars to display the contained webpage. On Firefox and IE this works great, there is no scrollbar since I use <iframe ... scrolling="no"></iframe>. However, on webkit browsers (Safari and Chrome), the vertical scrollbar persists even when there is sufficient room for the page without the scrollbar (the scrollbar is grayed out). How do I hide the scrollbar for webkit browsers? Thanks, Ken

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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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• WPF ToolBar Separator shrinks to nothing when inside a StackPanel

  - by qntmfred

  Given the very simple wpf app <Window x:Class="Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="800"> <Grid> <ToolBar Height="50" > <MenuItem Header="Test1" /> <MenuItem Header="Test2" /> <StackPanel Orientation="Horizontal"> <Separator /> <MenuItem Header="Test3" /> <MenuItem Header="Test4" /> <MenuItem Header="Test5" /> </StackPanel> </ToolBar> </Grid> </Window> The Separator element shrinks to nothing. If I put the Separator just before the StackPanel begins, it will show up. Why does this happen? Is there a style setting that can be applied somewhere to avoid this?

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• MyContainer derived from FrameworkElement with binding support.

  - by alex2k8

  To understand how the binding works, I implemented MyContainer derived from FrameworkElement. This container allowes to set Children and adds them into the logical tree. But the binding by ElementName does not work. What can I do with MyContainer to make it work, leaving the parent as FrameworkElement? C#: public class MyContainer : FrameworkElement { public MyContainer() { Children = new List<FrameworkElement>(); } public List<FrameworkElement> Children { get; set; } protected override IEnumerator LogicalChildren { get { return Children.GetEnumerator(); } } } XAML: <Window x:Class="WpfLogicalTree.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfLogicalTree" Title="Window1" Height="300" Width="300"> <StackPanel> <local:MyContainer> <local:MyContainer.Children> <TextBlock Text="Foo" x:Name="_source" /> <TextBlock Text="{Binding Path=Text, ElementName=_source}" x:Name="_target"/> </local:MyContainer.Children> </local:MyContainer> <Button Click="Button_Click">Test</Button> </StackPanel> </Window> Window1.cs private void Button_Click(object sender, RoutedEventArgs e) { MessageBox.Show(_target.Text); }

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• Imagick: gifs, and background color

  - by TheButch3r

  Hi, I have 2 questions about using the php imagick class that I can't get working properly... 1.) I tried resizing / cropping a gif, and treated it as a normal image. It seemed to work, except that a few frames in the middle of the animation contained a small patch of artifacts. Is there a setting that should be used when working with multi-frame gifs? 2.) Is there a simple command to resize images if they are too small by just adding a background? For instance, if an image is 10x10, could I add a white background, and have a 100x100px image with the original in the upper left corner? Thanks for any help!

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• GUI Agent accepts statuses from Daemon and shows it using progress indicator

  - by Pavel

  Hi to all! My application is a GUI agent, which communicate with daemon through the unix domain socket, wrapped in CFSocket.... So there are main loop and added CFRunLoop source. Daemon sends statuses and agent shows it with a progress indicator. When there are any data on socket, callback function begin to work and at this time I have to immediately show the new window with progress indicator and increase counter. //this function initiate the runloop for listening socket - (int) AcceptDaemonConnection:(ConnectionRef)conn { int err = 0; conn->fSockCF = CFSocketCreateWithNative(NULL, (CFSocketNativeHandle) conn->fSockFD, kCFSocketAcceptCallBack, ConnectionGotData, NULL); if (conn->fSockCF == NULL) err = EINVAL; if (err == 0) { conn->fRunLoopSource = CFSocketCreateRunLoopSource(NULL, conn->fSockCF, 0); if (conn->fRunLoopSource == NULL) err = EINVAL; else CFRunLoopAddSource(CFRunLoopGetCurrent(), conn->fRunLoopSource, kCFRunLoopDefaultMode); CFRelease(conn->fRunLoopSource); } return err; } // callback function void ConnectionGotData(CFSocketRef s, CFSocketCallBackType type, CFDataRef address, const void * data, void * info) { #pragma unused(s) #pragma unused(address) #pragma unused(info) assert(type == kCFSocketAcceptCallBack); assert( (int *) data != NULL ); assert( (*(int *) data) != -1 ); TStatusUpdate status; int nativeSocket = *(int *) data; status = [agg AcceptPacket:nativeSocket]; // [stWindow InitNewWindow] inside [agg SendUpdateStatus:status.percent]; } AcceptPacket function receives packet from the socket and trying to show new window with progress indicator. Corresponding function is called, but nothing happens... I think, that I have to make work the main application loop with interrupting CFSocket loop... Or send a notification? No idea....

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• What's a better way to display a handle for resizing a view on iPhone / iPad?

  - by Christian

  I want to display a handle at the corners of a UIView that can be used to resize the view. How can I display the handles floating on the top of everything else and still have a connection to and be in sync with a view? The solution I implemented before looks like this: I put the view into another view that shows the handles on top of the corners. The problem with this approach is that the handles add extra space to the original view's size. Since Apple recommends at least 40 x 40 px for the size of a button, it is not very little space and also goes beyond the visible bounds of the original view. Another problem is that the original view has to be encapsulated in this 'helper view' object and thus becomes a part of something although it really is the main component.

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• clicking browser back button is opening a link in the previous page.

  - by Jebli

  I am using the below code protected void lnk_Click(object sender, EventArgs e) { try { string strlink = ConfigurationManager.AppSettings["link"].ToString().Trim(); StringBuilder sb = new StringBuilder(); sb.Append("<script type = 'text/javascript'>"); sb.Append("window.open('"); sb.Append(strlink); sb.Append("');"); sb.Append("</script>"); ClientScript.RegisterStartupScript(this.GetType(), "script", sb.ToString()); } } In the page there are two links. When i click the first link it opens a window in a new page. I do this by using the above code. I am clicking the second link in the page and navigating to another page. Now i am clicking the browser back button. Supprisingly its opening the first link. How clicking back button is opening the link in the page. I am using c# .net 2005. Please help. Thanks. Regards,enter code here Radha A

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• javascript to select text from web page

  - by phil swenson

  I'm trying to write a bookmarklet that grabs any selected text on a web page and sends it to my website. It should (hopefully) work in Chrome, FFX, Safari, and IE. I did a search and found a function, but it doesn't appear to work. Here is the code: <html> <body> <div onClick=getSelText()>Click</div> <div>please select me</div> </body> <script language=javascript> function getSelText(){ var txt = 'nothing'; if (window.getSelection){ txt = "1" + window.getSelection(); } else if (document.getSelection) { txt = "2" + document.getSelection(); } else if (document.selection) { txt = "3" + document.selection.createRange().text; } else return; alert("selected text = " + txt); } </script> </html> when I select the text in the div "please select me" and hit the click div, I just get "selected text = 1" thanks

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• jQuery: Animated header plugin

  - by Fverswijver

  I'm looking for a jQuery plugin that can help me with the following: I have a list of images I want to use for my header but they are pretty big (height especially) and I don't want to resize them to fit my small header div. What I'd want is a plugin that allows the images to start at the bottom of the div (or rather the top of the image at the top of the div) and move upwards so the entire image can be seen, and once up they are shown entirely (bottom of image at bottom of div) they should "blend" (opacity toggle or something alike) with the next image and thus create a continuous loop with all the images. I've looked through several plugins but have never found one that can achieve what I'm looking for (maybe I'm asking for a tad too much) but my JS is not sufficient enough to build it myself. Thanks!

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• PHP/WordPress Session CountDown

  - by Cameron

  I have the following code to show how long a user has left before their session will expire, I am using WordPress. How can I do this? Thanks <script> var obj_Span; var n_Seconds = 0; var n_Minutes = 0; var n_Hours = 0; function F_ConvertNumberToString ( n_Num ) { var str_Num = String(n_Num); if ( str_Num.length < 2 ) str_Num = "0" + str_Num; return str_Num; } function F_CountDown () { if ( n_Hours == 0 && n_Minutes == 0 && n_Seconds == 0 ) { obj_Span.innerHTML = "(Sorry, your session has expired.)"; } else { if ( n_Seconds >= 0 ) n_Seconds --; if ( n_Seconds < 0 ) { n_Minutes --; n_Seconds = 59; } if ( n_Minutes >= 0 ) { window.setTimeout ( "F_CountDown()", 1000 ); } if ( n_Minutes < 0 ) { n_Hours --; n_Minutes = 59; window.setTimeout ( "F_CountDown()", 1000 ); } F_UpdateDisplay (); } } function F_UpdateDisplay ( ) { if ( document.getElementById ) { if (n_Hours > 0 ) obj_Span.innerHTML = "(Remaining " + F_ConvertNumberToString(n_Hours) + ":" + F_ConvertNumberToString(n_Minutes) + ":" + F_ConvertNumberToString(n_Seconds) + ")"; else obj_Span.innerHTML = "(Remaining " + F_ConvertNumberToString(n_Minutes) + ":" + F_ConvertNumberToString(n_Seconds) + ")"; } } function F_StartCountDown ( n_Session ) { obj_Span = document.getElementById ( "CountDown" ); n_Minutes = n_Session; n_Hours = Math.floor(n_Minutes/60); n_Minutes = n_Minutes - (60*n_Hours); F_CountDown (); } </script> <script> F_StartCountDown ( " code here... " ); </script> <span id="CountDown"></span>

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• doubt in javascript name validation

  - by raja

  Hi: I am using the below validation for textbox which accepts only alphabets and maximum of 50 characters. I am passing the object directly in the parameter. The below case by giving the field name i.e "my_text" directly is working is working fine. But if i pass it in variable, that time it is not working(commented the if statement). Please help me. My requirement is each time when we enter the charater, the hardcode field name should not be used in the validation. <html><head> <script language=JavaScript> function check_length(my_form,fieldName) { alert(fieldName); // if (my_form.fieldName.value.length >= maxLen) { if (my_form.my_text.value.length >= maxLen) { var msg = "You have reached your maximum limit of characters allowed"; alert(msg); my_form.my_text.value = my_form.my_text.value.substring(0, maxLen); } else{ var keyCode = window.event.keyCode; if ((keyCode < 65 || keyCode > 90) && (keyCode < 97 || keyCode > 123) && keyCode != 32) { window.event.returnValue = false; alert("Enter only Alphabets"); } my_form.text_num.value = maxLen - my_form.my_text.value.length;} } </script> </head> <body> <form name=my_form method=post> <input type="text" onKeyPress=check_length(this.form,this.name); name=my_text rows=4 cols=30> <br> <input size=1 value=50 name=text_num> Characters Left </form> </body> </html>

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• How to Style Custom Recaptcha Widget Using Ambethia Ruby Gem?

  - by cotopaxi

  I'm not sure how to go about styling a custom theme Recaptcha widget using http://github.com/ambethia/recaptcha I want to resize the widget to fit in a form in a sidebar. If I do <%= recaptcha_tags :display => {:theme => 'custom', :custom_theme_widget => 'recaptcha_widget'} %> and add <div id="recaptcha_widget"> <div id="recaptcha_image"></div> <input type="text" id="recaptcha_response_field" name="recaptcha_response_field" /> </div> as per http://stackoverflow.com/questions/1715575/recaptcha-form-customization I only get the response input field, and an error message in the source attribute of the img tag src="http://optim.coral.cs.cmu.edu/error/TypeError_Result_of_expression___recaptcha_response_field__null_is_not_an_object_" Has anyone found a good way to custom theme the Recaptcha widget using the Ambethia gem?

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• javascript ajax help

  - by ngreenwood6

  I have the following code. var d3_ad = 1; function displayD3Ad(){ var query_string = '?d3_ad='+d3_ad; query_string += '&location='+escape(location); //document.write('<iframe src="index.php'+query_string+'"></iframe>'); var data = httpRequest('http://localhost/test/index.php','GET',query_string); document.write(data); } function httpRequest(strURL,type,query) { var request = false; if (window.XMLHttpRequest) {// Mozilla/Safari request = new XMLHttpRequest(); } else if (window.ActiveXObject) { //Internet Explorer request= new ActiveXObject("Microsoft.XMLHTTP"); } request.open(type, strURL + query, true); request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); request.onreadystatechange = function() { if (request.readyState == 4) { return request.responseText; } } request.send(null); } displayD3Ad(); now when it writes out the data it is saying undefined. It seems like it isnt returning the data. I looked in firebug and it completes and shows the response that shoudl be there. Any help is appreciated. I just need to set the data variable so that I can use it later on.

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• jquery lightbox multiple items to look like mac dashboard

  - by Don

  Hope the title says it all... I'm wondering if it's possible in any existing lightbox to pop up a look similar to the mac dashboard where multiple divs could be "on" in the front with the main webpage with a gray overlay. Basically something where a user clicks an icon on the main webpage to call, and then 4 separate content boxes are popped on top, but not in a window like a gallery. I'm thinking the top background used could be set to transparent and the individual items could be divs on the popped area, but before I reinvent the wheel, I thought I'd see if there's something like this that I just haven't found in my searches. UPDATE: 1/7/2011 I ended up using colorbox with a background behind my divs. It doesn't look like the mac with items having the bg behind them showing between them, but after talking to the designer I'm working with, that wasn't something they really needed anyhow. I think it MAY be possible changing some of the CSS though for the bg of the "popped" window. Colorbox seems to be pretty nice about making it clear what the CSS is doing and there are multiple example skins. Just my $0.02...

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• Event type property lost in IE-8

  - by Channel72

  I've noticed a strange Javascript error which only seems to happen on Internet Explorer 8. Basically, on IE-8 if you have an event handler function which captures the event object in a closure, the event "type" property seems to become invalidated from within the closure. Here's a simple code snippet which reproduces the error: <html> <head> <script type = "text/javascript"> function handleClickEvent(ev) { ev = (ev || window.event); alert(ev.type); window.setTimeout(function() { alert(ev.type); // Causes error on IE-8 }, 20); } function foo() { var query = document.getElementById("query"); query.onclick = handleClickEvent; } </script> </head> <body> <input id = "query" type = "submit"> <script type = "text/javascript"> foo(); </script> </body> </html> So basically, what happens here is that within the handleClickEvent function, we have the event object ev. We call alert(ev.type) and we see the event type is "click". So far, so good. But then when we capture the event object in a closure, and then call alert(ev.type) again from within the closure, now all of a sudden Internet Explorer 8 errors, saying "Member not found" because of the expression ev.type. It seems as though the type property of the event object is mysteriously gone after we capture the event object in a closure. I tested this code snippet on Firefox, Safari and Chrome, and none of them report an error condition. But in IE-8, the event object seems to become somehow invalidated after it's captured in the closure. Question: Why is this happening in IE-8, and is there any workaround?

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• Hide TabControl buttons to manage stacked Panel controls

  - by Luca

  I need to handle multiple panels, containing variuous data masks. Each panel shall be visible using a TreeView control. At this time, I handle the panels visibility manually, by making the selected one visible and bring it on top. Actually this is not much confortable, especially in the UI designer, since when I add a brand new panel I have to resize every panel and then design it... A good solution would be using a TabControl, and each panel is contained in a TabPage. But I cannot find any way to hide the TabControl buttons, since I already have a TreeView for selecting items. Another solution would be an ipotethic "StackPanelControl", where the Panels are arranged using a stack, but I couldn't find it anywhere. What's the best solution to handle this kind of UI?

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