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• Threading: problem with checkbox's visibility

  - by Manish

  In a C#.NET windows application I set the visibility of the checkbox to false: checkBoxLaunch.Visible = true; I started a thread. Thread th = new Thread(new ThreadStart(PerformAction)); th.IsBackground = true; th.Start(); The thread performs some stuff and sets the visibility to true private void PerformAction() { /* . .// some actions. */ checkBoxLaunch.Visible = true; } But after the thread finishes it's task, the check box is not visible to me.. :( What am I missing??

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• Context module for block visibility

  - by calebthorne

  I have a site built in Drupal 6 that requires a number of blocks that are only visible to certain roles or on specific pages. Normally, I would use the block configuration settings to control page and role visibility. However I recently ran across the context module that effectively splits the site into "sections" or "groups" of related attributes. My question is: When is it appropriate to control block visibility from context rather than the block configuration settings? Should I only use one or the other or a combination of both?

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• How to toggle a WPF Grid column visibility

  - by serialhobbyist

  I'm having some trouble getting this to work in a WPF app I'm working on. Basically, what I'm after is something like the Task pane in an MMC: The app has three columns in the main part of the display. I need a column on the right side which is resizable. I presume this means using a Grid with a GridSplitter but anything that works will do. I want to be able to save the width of the right-side column when the app is closed and load it when the app is opened but this should be an initial size: the user should be able to resize it. When I resize the window, I want the left- and right-side columns to stay the same size and the middle column to resize with the window width. The left- and right-side columns need to have a minimum width. When I resize the right-side column I want the centre column to get smaller but not the left-side column. I also want to be able to toggle the visibility of the right-side column with a toggle button which is outside the column and when it returns to visibility I want it to be the same width it was before. I'm trying to do as much as possible in XAML and with binding. And can I have it topped with cream, ice cream and chocolate chips, please? :-)

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• visibility false, XML, as3

  - by pixelGreaser

  Hey, I'm using external XML to set flash vars. Alpha works, but not Visibility. How do I get my swf to respond to visibility? Thanks. XML <?xml version="1.0" encoding="utf-8"?> <SESSION> <BGv TITLE="visible true">false</BGv> <BGa TITLE="alpha 50 percent">.5</BGa> </SESSION> SWF //LISTEN AND LOAD XML var myXML:*; var myLoad:URLLoader = new URLLoader(); myLoad.load(new URLRequest("visible.xml")); myLoad.addEventListener(Event.COMPLETE, parseXML); //PARSE XML function parseXML(e:Event):void { myXML = new XML(e.target.data); //MY TEST var bgA:*; var bgV:*; trace(myXML.BGa.text()); trace(myXML.BGv.text()); bgA =(myXML.BGa.text()); bgV =(myXML.BGv.text()); //MY OBJECT bg.alpha = bgA;//This works great bg.visible = bgV;//This has no effect } OUTPUT .5 false

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• Changing iframe visibility on Mozilla not working

  - by Honski

  I've got a simple iframe that I want hidden until an event from that iframe is fire via easyXDM. It's working fine on Chrome, but somehow not on Mozilla. The event is being fired on both browsers, but only shows the iframe on Chrome. The only way to show the iframe on Mozilla is to call the same code using an onclick event. HTML: <a href="#" onclick="shower(); return false;">show frame (always working)</a> <br> <iframe src="testsite.php" width="600" height="424" scrolling="no" border="0" id="my-iframe3" style="visibility: hidden;" onload="scrollIFrame();" name="my-iframe3"> Javascript: function shower() { document.getElementById("my-iframe3").style.visibility="visible"; } var socket = new easyXDM.Socket( { onMessage: function(message, origin) { if (message == "hi") { socket.postMessage("do something"); } else if (message == "ready") { shower(); } } }); Both browsers receive the "ready" message.

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• vb.net module visibility

  - by dcp

  If I have a module in a VB.Net class library, will it's visibility be limited to the assembly? What I'm looking for is the VB.Net equivalent of a C# internal static class. Does anyone know the equivalent?

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• Does visibility affect DOM manipulation performance?

  - by Chetan Sastry

  IE7/Windows XP I have a third party component in my page that does a lot of DOM manipulation to adjust itself each time the browser window is resized. Unfortunately I have little control of what it does internally and I have optimized everything else (such as callbacks and event handlers) as much as I can. I can't take the component off the flow by setting display:none because it fails measuring itself if I do so. In general, does setting visibility of the container to invisible during the resize help improve DOM rendering performance?

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• IE CSS bug: table border showing div with visibility: hidden, position: absolute

  - by Alessandro Vernet

  The issue I have a <div> on a page which is initially hidden with a visibility: hidden; position: absolute. The issue is that if a <div> hidden this way contains a table which uses border-collapse: collapse and has a border set on it cells, that border still shows "through" the hidden <div> on IE. Try this for yourself by running the code below on IE6 or IE7. You should get a white page, but instead you will see: Possible workaround Since this is happening on IE and not on other browsers, I assume that this is an IE bug. One workaround is to add the following code which will override the border: .hide table tr td { border: none; } I am wondering: Is this a known IE bug? Is there a more elegant solution/workaround? The code <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <style type="text/css"> /* Style for tables */ .table tr td { border: 1px solid gray; } .table { border-collapse: collapse; } /* Class used to hide a section */ .hide { visibility: hidden; position: absolute; } </style> </head> <body> <div class="hide"> <table class="table"> <tr> <td>Gaga</td> </tr> </table> </div> </body> </html>

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• Flex chart zooms out on series visibility change

  - by asawilliams

  I have a chart that the user is able to zoom into an area by setting the min and max of LinearAxis for the vertical and horizontal axis. When you are zoomed in and you want to view or hide one of the series the chart zooms out to the max and then back in. How do I get the chart to not zoom out when setting the visibility of the series?

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• WPF MediaElement stops when losing visibility, override

  - by Nate Gates

  Hey guys, I have a situation where a MediaElement may loose visibility, which cause the video to stop, I want to override this behavior and let it continue in the background. Thoughts?

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• How to check if an element is really visible with javascript.

  - by Macha

  In javascript, how would you check if an object is actually visible. I don't just mean checking the visibility and display attributes. I mean, checking that the element is not visibility:hidden or display:none underneath another element scrolled off the edge of the screen. EDIT: For technical reasons, I can't include any scripts. I can however use prototype as it is on the page already. EDIT 2: This is no longer neccesary, but I'd still find an answer interesting)

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• Flex repeater - toggle sibling component visibility on checkbox change

  - by steve_c

  I have a Flex repeater that has a complex item template. When a checkbox is clicked, I need to toggle the visibility of a sibling button contained in the same repeater template. Since I can't add binding expressions to event handlers, I can't pass in the repeater item's index. How can I access sibling components inside a repeater item?

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• How to set visibility for textblocks in QTextEdit?

  - by serge

  Hi everyone, i tried to hide textblock's in QTextEdit, but it doesn't work: block = textedit.document().begin() block.setVisible(False) This code works fine for QPlainTextEdit, but not for QTextEdit. In documentation i haven't found any mention of how it should work for QTextEdit, just following: void QTextBlock::setVisible ( bool visible ) Sets the block's visibility to visible. This function was introduced in Qt 4.4. See also isVisible(). How can i hide block's in QTextEdit? Thank you in advance

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• Eclipse - limiting a command's visibility to a specific perspective

  - by Tom

  How do I limit the visibility of an Eclipse command in menus and the toolbar to just one perspective? It is currently showing up in all perspectives, but it only makes sense to have it around when working in this particular perspective. It seems like this could be done with "contexts", but I was wondering if there was something simpler.

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• Hiding instantiated templates in shared library created with g++

  - by jchl

  I have a file that contains the following: #include <map> class A {}; void doSomething() { std::map<int, A> m; } When compiled into a shared library with g++, the library contains dynamic symbols for all the methods of std::map<int, A>. Since A is private to this file, there is no possibility that std::map will be instantiated in any other shared library with the same parameters, so I'd like to make the template instantiation hidden (for some of the reasons described in this document). I thought I should be able to do this by adding an explicit instantiation of the template class and marking it as hidden, like so: #include <map> class A {}; template class __attribute__((visibility ("hidden"))) std::map<int, A>; void doSomething() { std::map<int, A> m; } However, this has no effect: the symbols are still all exported. I even tried compiling with -fvisibility=hidden, but this also has no effect on the visibility of the methods of std::map<int, A> (although it does hide doSomething). The document I linked to above describes the use of export maps to restrict visibility, but that seems very tedious. Is there a way to do what I want in g++ (other than using export maps)? If so, what is it? If not, is there a good reason why these symbols must always be exported, or is this just a omission in g++?

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• Question about domain models & their visibility...

  - by Another SO User

  I was involved in an interesting debate about the visibility of domain models & was wondering if people here have any good guidance. Per my understanding of MDA, we need not expose the domain model throughout the application layers & tiers The reason being that any change to the domain model has an impact in the overall application The wise thing to do would be to expose light-weight object (DTO's) which are a small sub-set of the domain model to abstract the actual model On the flip side, any change to the domain model would mean changing various DTO's throughout the application for the change to be visible, while if we do expose the domain model, then the change is in a single location Hope to see some comments & thoughts about this. Appreciate all the help!

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• Visibility of elements by ID

  - by dragonfly

  Hi, how come that when I attach onchange by attribute and call it onchange="validateDate(FPR_CURR_FROM);" it works, but when I use a ASP .NET validator, and my attached function is called like : function anonymous() { ValidatorOnChange(event); validateDate(FPR_CURR_FROM); } I get error: FPR_CURR_FROM is undefined. First off: I know that using FPR_CURR_FROM to access element is BAD, and I should use getElementByID etc... And I will change it eventually. But as I bumped into that code, I'm curious what caused it - propably visibility of variables I guess.

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• I'm trying to use a PHP code for panel visibility in a Panels3 based on Friendlist

  - by user366902

  I'm trying to gain a truth value to gain panel visibility. I have a view in place in a panel to display a listing of heartbeat messages that belong to a user. The display works but I cannot figure out how to restrict access to the panel based on the user who is viewing the panel. Goal is I want the panel to only be visible to friends and some people with certain roles. The roles I can handle but I don't know enough about PHP to get it working based on friendship status. I vaguely guess it would be something like: logged user is twoway with user being viewed based on current uid argument. I know my example is nothing like the actual code but as I said I don't have much to go on here.

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• Datapager in silverlight 4 -Nested datagrid visibility issue

  - by Archie

  I have a datagrid in silverlight with child datagrid nested in it. Also I have a DataPager on the outer datagrid. The code looks like this: <data:DataGrid x:Name="dgData" Width="600" ItemsSource="{Binding}" AutoGenerateColumns="False" IsReadOnly="True" HorizontalScrollBarVisibility="Hidden" CanUserSortColumns="False" RowDetailsVisibilityChanged="dgData_RowDetailsVisibilityChanged" Margin="20,0" Grid.RowSpan="2"> <data:DataGrid.Columns> <data:DataGridTextColumn Header="Item" Width="*" Binding="{Binding ItemName,Mode=TwoWay}"/> <data:DataGridTextColumn Header="Company" Width="*" Binding="{Binding Company,Mode=TwoWay}"/> </data:DataGrid.Columns> <data:DataGrid.RowDetailsTemplate> <DataTemplate> <data:DataGrid x:Name="dgRowDetail" Width="400" HorizontalScrollBarVisibility="Hidden" AutoGenerateColumns="False" Visibility="Collapsed"> <data:DataGrid.Columns> <data:DataGridTextColumn Header="Date" Width="*" Binding="{Binding Date,Mode=TwoWay}"/> <data:DataGridTextColumn Header="Price" Width="*" Binding="{Binding Price,Mode=TwoWay}"/> </data:DataGrid.Columns> </data:DataGrid> </DataTemplate> </data:DataGrid.RowDetailsTemplate> </data:DataGrid> <data:DataPager x:Name="dpData" HorizontalAlignment="Center" DisplayMode="FirstLastPreviousNextNumeric" Source="{Binding}"/> I have one PagedCollectionView pgv which is bound to outer datagrid as: DataContext = pgv; When the row is clicked I set the child datagrid's ItemsSource property to another PagedCollectionView. My problem is it works fine except for the first row for the first time. When I click on it, it doesn't fire the dgData_RowDetailsVisibilityChanged event. Also, when I click on second row, firstly first row fires the event and then the second row fires it and shows the nested grid. Please help.

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• Bind button visibility to the expresion (C#)

  - by drasto

  I have a delete button in each row of GridView (component ASP.NET). I want some of the delete buttons to be invisible. The visibility of the delete button should depend on the data that are back the row. GridView is backed by EntityDataSource. GridView displays entities called Category, one instance in each row. Entity Category has (besides others) also a field of type EntityCollection. Name of that field is Items. Basically I want to allow user to delete a row only if the Items field of backing Category entity is an empty collection. I cannot make up the binding of Visible property. I have no experience with bindings and Google does not really help. This is how the button looks right now: <asp:Button ID="DeleteButton" runat="server" CommandName="Delete" Text="Delete" Visible=??? ></asp:Button> I don't know what should replace ???. The button schold be visible only when this expression evaluates to true: ((SimpleEShop.Model.Category) dataItem).Items.LongCount() <= 0 where dataItem variable contains data of current row in the table. What is the binding that I need ?

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• jQuery toggling div visibility

  - by Eef

  I have a HTML document with the below setup: <div class="main-div" style="padding: 5px; border: 1px solid green;"> <div class="first-div" style="width: 200px; height: 200px; padding: 5px; border: 1px solid purple"> First Div <a href="#" class="control">Control</a> </div> <div class="second-div hidden" style="width: 200px; height: 200px; padding: 5px; border: 1px solid red;"> Second Div <a href="#" class="control">Control</a> </div> </div> I also have a CSS class setup called hidden with display setup to none. I have jQuery setup like so: $('.control').click(function(){ var master = $(this).parent().parent(); var first_div = $(master).find(".first-div"); var second_div = $(master).find(".second-div"); $(first_div).toggleClass("hidden") $(second_div).toggleClass("hidden") }); This setup toggles the visibility of the divs, click the control button it hides one div and show the other. However this just hides and shows each div in a flash. I am looking to add some animation to the transitioning of the divs, maybe have one slide up and the other slide down when the 'control' is clicked and vice versa but I am unable to achieve this. Could anyone help out and give some advice on how to do this? Cheer Eef

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• Windows.Threading.Dispatcher' does not contain a definition for 'RunAsync' and no extension method 'RunAsync' accepting a first argument of type

  - by suhail mehdi

  public MainPage() { InitializeComponent(); offline.Visibility = (Network.IsConnected ? Visibility.Collapsed : Visibility.Visible); Network.InternetConnectionChanged += async (s, e) => { await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => { offline.Visibility = (e.IsConnected ? Visibility.Collapsed : Visibility.Visible); }); }; }

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• Changing the itemsSource of a treeview makes it's children invisible, when they were already display

  - by Marnix Kraus

  I found some strange problem in WPF, using the itemsSource of a treeview. I hope I can make this specific problem clear for you. First; a story. There is a treeview. It has a list with treeviewitems as itemsSource. This list is called _roots. There is another list, called _leafs. For as in a treeview, the _roots contain the _leafs in some hierarchical way. For example: <TreeviewItem Header="Jungle"> <TreeviewItem> <SpecialTreeviewItem Header="Monkey"/> <SpecialTreeviewItem Header="Apple"/> </TreeviewItem> </TreeviewItem> Now I am trying to switch between these two lists as itemsSource. It seemed to work fine, but it doesn't: When the Jungle-item is un-expanded, and I change the itemsSource to _leafs, and change it back again to _roots, everything works fine and all items can be expanded and showed. But when the Jungle-item is expanded (and the special items are already visible) and I change it to the _leafs itemsSource, and then change the itemsSource back to _roots, all special items have disappeared!! Also, when I do the same as case 2, but first un-expand the Jungle-item again, the special items also disappear. I did a lot of debugging, before posting this question here and come to the following conclusion: Printing on the event: visibility changed, the visibility is set to false for all items that were already visible (that is, when _roots become visible, the special items become invisible (because they were already visible)) So, IsVisible is false for the items, but Visibility = Visible. Which is a bit strange. The problem seems to depend on the use of the _roots list, which in a certain way contain the _leafs. When I change the itemsSource to different lists with special items in it, everything works fine. The hierarchical structure of the _roots make this thing broken. I hope that this is a complete overview of my problem. Help would be appreciated.

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• Use TinyInt to hide/show controls?

  - by grady

  Hi, I have 6 buttons on my GUI. The visibility of the buttons can be configured via checkboxes. Checking the checkbox and saving means the correpsonding button should be shown. I am wondering if it is somehow possible to have one TinyInt column in the database which represents the visibility of all 6 buttons. I created an enum for the buttons, it looks like that: public enum MyButtons { Button1 = 1, Button2 = 2, Button3 = 3, Button4 = 4, Button5 = 5, Button6 = 6 } Now I am wondering how to say that for example only button1, button5 and button6 are checked using this one column. Possible at all? Thanks :-)

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• WPF - hiding listbox items

  - by user553765

  Hi, I have a listbox where the itemtemplate is using a style. The styles specifies a border with a datatrigger setting the visibility of the border to collapsed depending on a property. This works fine except I can still see a very narrow line for each item, in the list, that is collapsed. I was hoping someone could help with how to set the visibility so that there are no visible traces as this is quite apparent when consecutive items have been collapsed. The datatemplate specifies an outer border with a dockpanel inside of this - there are then stackpanels docked to this. Any help is appreciated.

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