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  • Android: Context menu doesn't show up for ListView with members defined by LinearLayout?

    - by RandomEngy
    I've got a ListActivity and ListView and I've bound some data to it. The data shows up fine, and I've also registered a context menu for the view. When I display the list items as just a simple TextView, it works fine: <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/nametext" android:layout_width="wrap_content" android:layout_height="wrap_content"/> However when I try something a bit more complex, like show the name and a CheckBox, the menu never shows up: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:id="@+id/nametext" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <CheckBox android:id="@+id/namecheckbox" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout> Can long-presses work on more complex elements? I'm building on 2.1.

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  • Deadlock error in INSERT statement

    - by Gnanam
    We've got a web-based application. There is a time-bound database operation (INSERTs and UPDATEs) in the application which takes more time to complete, hence this particular flow has been changed into Java Thread so it will not wait (block) for the complete database operation to be completed. My problem is, if more than 1 user come across this particular flow, I'm facing the following error thrown by PostgreSQL: org.postgresql.util.PSQLException: ERROR: deadlock detected Detail: Process 13560 waits for ShareLock on transaction 3147316424; blocked by process 13566. Process 13566 waits for ShareLock on transaction 3147316408; blocked by process 13560. Above error is consistently thrown in INSERT statements. Additional Information: 1) I have PRIMARY KEY defined in this table. 2) There are FOREIGN KEY references in this table. 3) Separate database connection is passed to each Java Thread. Technologies Web Server: Tomcat v6.0.10 Java v1.6.0 Servlet Database: PostgreSQL v8.2.3 Connection Management: pgpool II

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  • fastest (low latency) method for Inter Process Communication between Java and C/C++

    - by Bastien
    Hello, I have a Java app, connecting through TCP socket to a "server" developed in C/C++. both app & server are running on the same machine, a Solaris box (but we're considering migrating to Linux eventually). type of data exchanged is simple messages (login, login ACK, then client asks for something, server replies). each message is around 300 bytes long. Currently we're using Sockets, and all is OK, however I'm looking for a faster way to exchange data (lower latency), using IPC methods. I've been researching the net and came up with references to the following technologies: - shared memory - pipes - queues but I couldn't find proper analysis of their respective performances, neither how to implement them in both JAVA and C/C++ (so that they can talk to each other), except maybe pipes that I could imagine how to do. can anyone comment about performances & feasibility of each method in this context ? any pointer / link to useful implementation information ? thanks for your help

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  • JetBrains dotTrace, is it possible to profile source code line by line? else I need another tool

    - by m3ntat
    I am using JetBrains dotTrace, I've profiled my app which is entirely CPU bound. But the results as you walk down the tree don't sum to the level above in the tree, I only see method calls not the body lines of the node in questions method. Is it possible to profile the source code line by line. i.e for one node: SimulatePair() 99.04% --nextUniform() 30.12% --IDCF() 24.08% So the method calls nextUniform + IDCF use 54% of the time in SimulatePair (or 54% total execution time I'm not sure how to read this) regardless what is happening the other 46% of SimulatePair I need some detail on a line by line basis. Any help or alternative tools is much appreciated. Thanks

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  • RabbitMQ serializing messages from queue with multiple consumers

    - by Refefer
    Hi there, I'm having a problem where I have a queue set up in shared mode and multiple consumers bound to it. The issue is that it appears that rabbitmq is serializing the messages, that is, only one consumer at a time is able to run. I need this to be parallel, however, I can't seem to figure out how. Each consumer is running in its own process. There are plenty of messages in the queue. I'm using py-amqplib to interface with RabbitMQ. Any thoughts?

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  • jQuery SlideDown Flickering in Firefox

    - by Sithlord
    Hi, once more a jQuery, Firefox flickering issue. (no flickering in IE6/7/8, Safari) I uploaded an example page here: http://sithlord.bplaced.net/testing/jquery_flickering/flickering.html There are two div containers. The inner div is the one I'm hiding. The outer one is the wraping container with the style elements. I found the flicker only occur with the selectbox. Without the SelectBox there is no flickering. But thats not all: (I cant post a second hyperlink: its the same link as above; only change "flickering.html" to not_flickering.html) In this case I selected a lower "option" - as you can see, the flicker disappears in this case. The same is happending, when there are less options in total. (less then about 20) The only workaround I found is deleting the selectbox :) Any ideas, why this is happening and how to fix it? Thanks!

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  • C# Nested Repeater Accessing elements

    - by Rich
    I have a list of Accommodation objects bound to a Repeater, and then a nested Repeater which has the various attendee groups listed [e.g. Default, Seniors, Juniors]. This is all output fine, with the values displayed as LinkButtons, which when clicked gets sent to a code-behind event handler. Here is an example of the output to give you a picture [with some er... interesting attendee group names]: In the event handler, I test the object parameter to see which Repeater has been sent, as the outer repeater's links can also be clicked [so the Accommodation would be set, but no Attendee Group]. Is there a way to get a HiddenField from the outer RepeaterItem that contains the currently clicked inner repeater's LinkButton? E.g. From the image, I click the Attending link in the Women section. So the EventArgs via FindControl can get me the hidden field which contains the Attendee Group's ID, which is good, but I also need the Accommodation ID [to know whether it was either Wimbledon Hotel Inn or New Acc]

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  • How can I run NHibenate queries asynchronously?

    - by andrey-tsykunov
    Hello, One way to increase scalability of the server application is to run IO-bound operation (reading files, sockets, web requests, database requests etc) asynchronously. This does not mean run then in the ThreadPool which will just block threads while operation is being executed. The correct way is to use asynchronous API (BeginRead, BeginGetResponse, BeginExecuteReader etc). The problem is well described in CLR vi C# book. Here is some article about asynchronous queries in Linq to SQL. Are any ways to execute Nhibernate query asynchonously? What about Linq to NHibernate? Thank you, Andrey

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  • .net Value Class sorting with IComparable

    - by greggorob64
    I'm running into an issue using a DataGridView bound to a iBindingListView implementation (third party dll) attached to a large collection. There's a certain property in my collection type, named MyDateTime, which is a value class similar to DateTime, but also with some legacy code. This VALUE CLASS implements iComparable, iComparable<T>, and iEquatable<T>. The issue I'm having is this: When I apply a sort to the iBindingListView, or the Automatic Sorting provided by the DGV on the MyDateTimeColumn, it ALWAYS uses the non-generic iComparer, causing hundreds of thousands of unnecessary boxing and unboxing. When I remove the non-generic iComparer, the generic one is still not used, it just does a string compare on the .ToString(). Am I missing something? Why is my generic comparer not bieng called on a sort?

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  • Customized sorting on DataTable in C#?

    - by Steve
    This is a C# Winform question. I have a DataGridView which is bounded to a DataTable. I construct the DataTable myself, which several DataColumn instances. When the DataTable is bound to the DataGridView, by default, every column is sortable by clicking the headers of the DataGridView. But the sorting behavior is something "by default". It seems that it is sorted by string. This is true even if I put this as my code: DataColumn dc = new DataColumn("MyObjectColumn", typeof(MyObject)); And MyObject has overriden ToString() and has implemented the IComparable interface. That means even if I have told the DataTable how to sort the special column with the implementation of IComparable interface, DataGridView still doesn't do it the way I expect. So how can I let DataTable sort data in the way I want? Thanks for the answers.

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  • Amazon S3 Add METADATA to existing KEY

    - by Daveo
    In S3 REST API I am adding metadata to an existing object by using the PUT (Copy) command and copying a key to the same location with 'x-amz-metadata-directive' = 'REPLACE' What I want to do is change the download file name by setting: Content-Disposition: attachment; filename=foo.bar; This sets the metadata correctly but when I download the file it still uses the keyname instead of 'foo.bar' I use a software tool S3 Browser to view the metadata and it looks correct (apart from 'Content-Disposition' being all lower case as that's was S3 ask me to sign) Then using S3 Browser I just pressed, then save without changing anything and now it works??? What am I missing how come setting a metadata 'Content-Disposition: attachment; filename=foo.bar;' from my web app does not work but does work from S3 Browser?

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  • How can I create a Multiple Value Combo box on an Unbound Form

    - by Jaffal
    Hi I need your help on MS Access 2007. I have a big problem with my MS Access Unbound Form. How can I create a combo box i do not want bound to a table, show a multiple value List? The Combo is named Sector and want these values to be selected in Multiples 9Which should be possible in Access 2007) from the Drop Down List: Fertilizer, Seeds, Pesticides, Veterinary products, Animal Feed, General. Which Select Statement or VBA code can I use. I need a solution to handle this please. Urgent Help needed please!!! Looking forward for your response. Thank you

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  • Changing SQL Server Database sorting

    - by plaisthos
    I have a request to change the collation of a SQL Server Database: ALTER DATABASE solarwind95 collate SQL_Latin1_General_CP1_CI_AS but I get this strange error: Meldung 5075, Ebene 16, Status 1, Zeile 1 Das 'Spalte'-Objekt 'CustomPollerAssignment.PollerID' ist von 'Datenbanksortierung' abhängig. Die Datenbanksortierung kann nicht geändert werden, wenn ein schemagebundenes Objekt von ihr abhängig ist. Entfernen Sie die Anhängigkeiten der Datenbanksortierung, und wiederholen Sie den Vorgang. Sorry for the german errror message. I do not know how to switch the language to english, but here is a translation: Translation: Message 5075, Layer 16, Status 1, Row 1 The 'column' object 'CustomPollerAssignment.PollerID' depends on 'Database sorting. The database sorting cannot be changed if a schema bound object depends on it. Remove the dependency of the database sortieren and retry. I got a ton more of the errors like that.

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  • Which Cortex-M3 interrupts can I use for general purpose work?

    - by Captain NedD
    I'd have some code that needs to be run as the result of a particular interrupt going off. I don't want to execute it in the context of the interrupt itself but I also don't want it to execute in thread mode. I would like to run it at a priority that's lower than the high level interrupt that precipitated its running but also a priority that higher than thread level (and some other interrupts as well). I think I need to use one of the other interrupt handlers. Which ones are the best to use and what the best way to invoke them? At the moment I'm planning on just using the interrupt handlers for some peripherals that I'm not using and invoking them by setting bits directly through the NVIC but I was hoping there's a better, more official way. Thanks,

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  • How to imitate focus on a div element?

    - by Alexis Abril
    The scenario involves imitating a drop down list. Instead of the standard input select element, we're using a set of custom images in combination with a few CSS styles and jQuery behaviors. All in all, we have a drop down list that works just fine. The question revolves around a drop down list losing focus. A normal select element losing focus would automatically close the list, however, since we are using a set of divs, it's not possibly to set or lose focus(and subsequently hide the list). We've been able to imitate normal drop down behavior by hiding a text input behind the div and setting the focus to it dynamically. For example: User clicks drop down list - content list is displayed and hidden text input is set as focus. Event is bound to the text input losing focus which hides the content list. I'm curious if the community has a better approach to hiding a div when a user clicks off, presses escape, etc.

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  • What's a good design to handle multiple global hotkeys?

    - by Alex
    I'm struggling to think of a good design to handle multiple global hotkeys. Say I have three different functions bound to three different global hotkeys... Play Song | Ctrl + P Skip Song | Ctrl + N Increase Volume | Ctrl + V What's a good, effective way to check if the hotkey pressed conforms to a certain function? I'm using a class very similar to this: http://www.liensberger.it/web/blog/?p=207 Should I create a new instance of the hotkey class for each hotkey? Hotkey hotkey = new Hotkey(); hotkey.RegisterHotkey(Shortcut.ModifierKeys.Control, Keys.F10); hotkey.KeyPressed += ((s, args) => { //Do Something! }); Or should I have an enum with different hotkey functions and manage it from within the hotkey class to prevent multiple instances (seems wasteful but easy). Thanks for any advice / help in advance.

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  • Cocoa Key Value Bindings: What are the explanations of the various options for Controller Key?

    - by Elisabeth
    When I bind a control to an NSArrayController using Interface Builder, there are a variety of options under the "Controller Key" field in the bindings inspector. I understand what "arrangedObjects" is, and I semi-understand what "selection" is, but I'd love to see a really nice explanation of all the options and when to use each one. The list includes: selectionIndexes, selectionIndex, selectedObject, sortDescriptors, etc. I haven't been able to find a good explanation of these options. I'm having trouble with a button that's bound to target selection, so I'm hoping a much deeper understanding of these Controller Keys might help me debug my issue. Thanks!!!

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  • WPF databinding update comboxbox2 based on selection change in combobox1 with MVVM

    - by cody
    I have a combo box that I have bound to a list that exists in my viewmodel. Now when a users makes a selection in that combo box I want a second combo box to update its content. So, for example, combobox1 is States and combobox2 should contain only the Zipcodes of that state. But in my case I don't have a predefined lists before hand for combobox2, I need to go fetch from a db. Also, if needed, I could get all the potential values for combobox2 (for each combobox1 value) before hand, but I'd like to avoiding that if I can. How do I implement in WPF and using MVVM? I'm fairly new to this whole wpf\databinding\mvvm world.

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  • Options for keeping models and the UI in sync (in a desktop application context)

    - by Benju
    In my experience I have only had 2 patterns work for large-scale desktop application development when trying to keep the model and UI in sync. 1-An eventbus approach via a shared eventbus command objects are fired (ie:UserDemographicsUpdatedEvent) and have various parts of the UI update if they are bound to the same user object updated in this event. 2-Attempt to bind the UI directly to the model adding listeners to the model itself as needed. I find this approach rather clunky as it pollutes the domain model. Does anybody have other suggestions? In a web application with something like JSP binding to the model is easy as you ussually only care about the state of the model at the time your request comes in, not so in a desktop type application. Any ideas?

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  • Customize WPF databinding: How to add custom logic?

    - by Ashwani Mehlem
    Hi, i have a question regarding some complex data-binding. I want to be able to update a grid (which has the property "IsItemsHost" set to true) dynamically whenever a data-binding occurs. To be more specific, i bind the grid to some items and i want to change the number of grid rows depending on these items, add something like a header (one row containing some text), and set the items' Grid.Row and Grid.Column using some custom logic. What is the easiest way to apply such behaviour whenever the bound data is updated? Do i have to use a viewmodel that also contains the header data? Thanks in advance.

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  • Winform BindingSources - Question

    - by Stephen Patten
    I have a windows form (net 2.0) with controls on it bound to an entity (w/ INotifyPropertyChanged) through a BindingSource..works. On the same form I have a drop down list that is also wired up through a BindingSource..works Here's a sample of the relevant code: m_PlanItemLookupBindingSource.DataSource = GetBusinessLogic().RetrievePaymentPlanLookups(); // Collection of PaymentPlans paymentPlanType.Properties.DataSource = m_PlanItemLookupBindingSource; paymentPlanType.Properties.DisplayMember = "Name"; paymentPlanType.Properties.ValueMember = "ID"; paymentPlanType.DataBindings.Add(new Binding("EditValue", m_PlanBindingSource, "PaymentPlanID", true, DataSourceUpdateMode.OnPropertyChanged, null, "D")); agencyComission.DataBindings.Add(new Binding("EditValue", m_PlanBindingSource, "AgencyCommission", true, DataSourceUpdateMode.OnPropertyChanged, null, "P1")); billingType.DataBindings.Add(new Binding("Text", m_PlanBindingSource, "BillingType")); So when I change a value in the drop down list I thought that the m_PlanItemLookupBindingSource Current property would change along with the PaymentPlanID property of the entity which does change. Just a bit confused. Thanks in advance, Stephen

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  • Binding position to ActualHeight

    - by Qanik
    Hi I want to bind a lists position to its own height in XAML. So its lower left corner always will be at 0.0 of the canvas. I'm using elementBinding to get the ActualHeight and a converter to invert the property. But the height sent to the converter is 0. How do I solve this or am I going at this the wrong way? <Canvas x:Name="DisplaySurface"> <ListBox x:Name="MenuList" Visibility="Visible" Canvas.Top="{Binding ElementName=MenuList, Path=ActualHeight, Converter={StaticResource LamdaConv}, ConverterParameter='val=>-val'}"> <ListBoxItem Content="item 1" /> <ListBoxItem Content="item 2" /> <ListBoxItem Content="item 3" /> <ListBoxItem Content="item 4" /> <ListBoxItem Content="item 5" /> <ListBoxItem Content="item 6" /> </ListBox> </Canvas> -Qanik

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  • WPF ComboBox SelectedItem - change to previous value

    - by Taylor
    Hello, I have a ComboBox that has the SelectedItem bound to the ViewModel. <ComboBox SelectedItem="{Binding SelItem, Mode=TwoWay}" ItemsSource="{Binding MyItems}"> When the user selects a new Item in the View ComboBox, I want to display a prompt and verify that they want to make the change. In the SetItem Property setter in the View Model, I display a Dialog to confirm the selection. When they say yes, it works fine. My problem is, when the user clicks on "No" I am not sure who to get the ComboBox to revert back to the previous value. The Property in the ViewModel has the correct older value, however in the View the ComboBox displays the newly Selected Value. I want the user to select an item, confirm they want to go ahead with it, and if they decide not to, I want the ComboBox to revert back to the previous item. How can I accomplish this? Thanks!

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  • Python thread pool similar to the multiprocessing Pool?

    - by Martin
    Is there a Pool class for worker threads, similar to the multiprocessing module's Pool class? I like for example the easy way to parallelize a map function def long_running_func(p): c_func_no_gil(p) p = multiprocessing.Pool(4) xs = p.map(long_running_func, range(100)) however I would like to do it without the overhead of creating new processes. I know about the GIL. However, in my usecase, the function will be an IO-bound C function for which the python wrapper will release the GIL before the actual function call. Do I have to write my own threading pool?

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  • Source code of books made with TeX/LaTeX to learn

    - by Diego Sevilla
    Some time ago, reading this entry I found a nice image and a pointer to a better book entitled "Thinking Forth". To my surprise, the LaTeX sources of the book were ready to download, with pearls like: %% There's no bold typewriter in Computer Modern. %% Emulate with printing several times, slightly moving \newdimen\poormove \poormove0.0666pt \newcommand{\poorbf}[1]{% \llap{\hbox to \poormove{#1\hss}}% \raise\poormove\rlap{#1\hss}% \lower\poormove\rlap{#1\hss}% \rlap{\hbox to \poormove{\hss}\hbox{#1}}% #1} %\let\poorbf=\textbf \renewcommand{\poorbf}[1]{{\fontencoding{OT1}\fontfamily{cmtt}\fontseries{b}\selectfont#1}} in which it can simulate the bold stroking of a font that doesn't have it. Since reading that, I was unaware of \llap and such, but now I can use them to define boxes, etc. So, my question is twofold: Do you know of sites that show that relatively advanced use of TeX/LaTeX in terms of useful recipes, and Do you know any books that offer their TeX/LaTeX source to inspect and learn (and that are worth doing so.)?

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