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• (VB.NET + WPF) Drag + Drop (to allow user sorting) of stackpanel elements within a Scrollviewer?

  - by Matt H.

  I have good model (I think!) for how to allow a user to drag an element in a stackpanel and reposition it to another location within the stackpanel. However, my Stackpanel is placed within a ScrollViewer, like this (generalized): <ScrollViewer> <StackPanel> ....First item ....Second item ....Third item ....Etc. </StackPanel> <ScrollViewer> Here is the problem, I wish to simulate the functionality of programs like word, where if I am dragging selected content (or an object) outside the viewable area, the window will scroll in the direction of the mouse to see more places to drop my nifty little object. ...i.e. If I move the mouse to the top of my ScrollViewer while dragging a stackpanel's contents, I want the scrollviewer to slowly move up so I can see more locations to drop my content. Any suggestions? If you can help me solve this, you will be a godsend!

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• Checking for & storing multiple CheckBox selections in CSharp.

  - by Matt

  I'm very new to CSharp and I can't seem to find a good solution to what I would consider a simple problem. Basically I'm trying to determine which CheckBoxs have been selected by the user and then randomly generate combinations of the selections the user has made. As new as I am, I am aware that you can use a simple statement such as: checkBox1.IsChecked == true I could have a long set of if statements which update an array/collection, but I'm told that in Csharp there is a way of determining which CheckBoxs are checked by querying the GroupBox that the CheckBoxs are in. Unless I'm mistaken (which is very possible) this is achieved by using Control features, unfortunately I've not come across these yet in my learning so if someone could clear things up that would be great. In summation, if someone has a simple solution for running through a set of checkBoxs and storing only the selected ones I would be most grateful.

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• Cannot format first column in WxPython's ListCtrl

  - by Matt Clarke

  If I set the format of the first column in a ListCtrl to align centre (or align right) nothing happens. It works for the other columns. This only happens on Windows - I have tested it on Linux and it works fine. Does anyone know if there is a work-round or other solution? Here is an example based on code found at http://zetcode.com/wxpython/ import wx import sys packages = [('jessica alba', 'pomona', '1981'), ('sigourney weaver', 'new york', '1949'), ('angelina jolie', 'los angeles', '1975'), ('natalie portman', 'jerusalem', '1981'), ('rachel weiss', 'london', '1971'), ('scarlett johansson', 'new york', '1984' )] class Actresses(wx.Frame): def __init__(self, parent, id, title): wx.Frame.__init__(self, parent, id, title, size=(380, 230)) hbox = wx.BoxSizer(wx.HORIZONTAL) panel = wx.Panel(self, -1) self.list = wx.ListCtrl(panel, -1, style=wx.LC_REPORT) self.list.InsertColumn(0, 'name', wx.LIST_FORMAT_CENTRE,width=140) self.list.InsertColumn(1, 'place', wx.LIST_FORMAT_CENTRE,width=130) self.list.InsertColumn(2, 'year', wx.LIST_FORMAT_CENTRE, 90) for i in packages: index = self.list.InsertStringItem(sys.maxint, i[0]) self.list.SetStringItem(index, 1, i[1]) self.list.SetStringItem(index, 2, i[2]) hbox.Add(self.list, 1, wx.EXPAND) panel.SetSizer(hbox) self.Centre() self.Show(True) app = wx.App() Actresses(None, -1, 'actresses') app.MainLoop()

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• C++ Linker Error SDL Image - could not read symbols

  - by Matt H

  Hi, I'm trying to use the SDL_Image library and I've added the .so to the link libraries list for my project (I'm using Code::Blocks, by the way). After doing this, when I go to compile, I get this error: Linking console executable: bin/Debug/ttfx /usr/lib32/libSDL_image-1.2.so: could not read symbols: File in wrong format What does this mean and how can I get it working? Thanks!

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• How to make Fluent NHibernate ignore Dictionary properties

  - by Matt Winckler

  I'm trying to make Fluent NHibernate's automapping ignore a Dictionary property on one of my classes, but Fluent is ignoring me instead. Ignoring other types of properties seems to work fine, but even after following the documentation and adding an override for the Dictionary, I still get the following exception when BuildSessionFactory is called: The type or method has 2 generic parameter(s), but 1 generic argument(s) were provided. A generic argument must be provided for each generic parameter. I've tried overriding by property name: .Override<MyClass>(map => { map.IgnoreProperty(x => x.MyDictionaryProperty); }) and also tried implementing ignores using a custom attribute, both of which result in the same exception from BuildSessionFactory. The only thing so far that makes this exception go away is removing the Dictionary property entirely. My question seems to be identical to this one which was never answered (though I'll expand the scope by stating it doesn't matter whether the dictionary is on an abstract base class; the problem always happens for me regardless of what class the property is on). Any takers this time around?

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• Hibernate vs JPA vs JDO - pros and cons of each?

  - by matt b

  I'm familiar with ORM as a concept, and I've even used nHibernate several years ago for a .NET project; however, I haven't kept up with the topic of ORM in Java and haven't had a chance to use any of these tools. But, now I may have the chance to begin to use some ORM tools for one of our applications, in an attempt to move away from a series of legacy web services. I'm having a hard time telling the difference betweeen the JPA spec, what you get with the Hibernate library itself, and what JDO has to offer. So, I understand that this question is a bit open-ended, but I was hoping to get some opinions on: What are the pros and cons of each? Which would you suggest for a new project? Are there certain conditions when it would make sense to use one framework vs the other?

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• Can't override a global WPF style that is set by TargetType on a single specific control

  - by Matt H.

  I have a style applied to all my textboxes, defined in a resource dictionary.. <Style TargetType="TextBlock"> <Setter Property="TextBlock.FontSize" Value="{Binding Source={StaticResource ApplicationUserSettings}, Path=fontSize, Mode=OneWay}" /> <Setter Property="TextBlock.TextWrapping" Value="Wrap" /> <Setter Property="TextBlock.VerticalAlignment" Value="Center"/> <Setter Property="Background" Value="Transparent"/> <Setter Property="TextBox.FontFamily" Value="{Binding Source={StaticResource ApplicationUserSettings}, Path=fontName, Mode=OneWay}"/> </Style>\ The fontsize and fontstyle properties are bound to a special user settings class that implements iNotifyPropertyChanged, which allows changes to font size and fontfamily to immediately propogate throughout my application. However, in a UserControl I've created (Ironically, the screen that allows the user to customize their font settings), I want the font size and fontfamily to remain static. No matter what I try, my global font settings override what I set in my user control: <UserControl x:Class="ctlUserSettings" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:R2D2" Height="400" Width="600"> <Grid> <Grid.Resources> <Style x:Key="tbxStyle" TargetType="TextBox"> <Style.Setters> <Setter Property="FontSize" Value="14"/> <Setter Property="FontFamily" Value="Tahoma"/> </Style.Setters> </Style> ... etc... <StackPanel Margin="139,122.943,41,0" Orientation="Horizontal" Height="33" VerticalAlignment="Top"> <TextBox Style="{x:Null}" FontSize="13" FontFamily="Tahoma" HorizontalAlignment="Left" MaxWidth="500" MinWidth="350" Name="txtReaderPath" Height="Auto" VerticalAlignment="Top" /> <TextBox Style="{x:tbxStyle}" Margin="15,0,0,0" HorizontalAlignment="Left" Name="txtPath" Width="43" Height="23" VerticalAlignment="Top">(some text)</Button> </StackPanel> I've tried setting Style to {x:Null}, setting custom font sizes inline, and setting a style in the resources of this control. None take precedence over the styles in my resource dictionary. As you can see, I show a sprinkling of all the things I've tried in the XAML sample above... What am I missing?

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• how can i tell ruby to use the html string

  - by Matt

  i have this "<img src='#{picture.url(:tiny)}'>" which prints to this &lt;img src='/system/pictures/2/tiny/Womacdsf.jpg?1294942797'&gt;, &lt;img src='/system/pictures/3/tiny/Womacdsf_3017.jpg?1294942797'&gt;, &lt;img src='/system/pictures/4/tiny/Womacdsf_8012.jpg?1294942797'&gt;, … (8) as you can see this is doing the &lt; and &gt; instead of the < and how can i tell ruby this is not what i want

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• Asynchronous Silverlight WCF callback

  - by Matt

  I've created my own WCF service and I've successfully been able to talk to it via my Silverlight client. I ran into an interesting problem on my asynchronous callbacks though. When my callback is invoked, I can't update any UI controls with the dreaded invalid cross thread access Here's what my callback function looks like private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e ) { lblDisplay.Text = e.Object.ToString(); } A quick google search showed me that I have to do this instead. private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e ) { Dispatcher.BeginInvoke( () => lblDisplay.Text = e.Object.ToString() ); } Now everything works fine, but I wasn't expecting my callback to be running on a different thread. Will I always have to use the Dispatcher class in order to modify anything within my class or is this just limited to UI elements? I've not familiar with the Dispatcher class at all so I'm looking to understand it more.

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• Scrolling screen upward to expose TextView above keyboard

  - by Matt Winters

  I think I'm missing something obvious and would appreciate an answer. I have a view with a 2-section grouped tableView, each section having one row and a textView, the heights of the rows 335 and 140. This allows for a box with nicely rounded corners to type text into when the keyboard appears (140 height section) and when the keyboard is dismissed, a nice box to read more text (notes); most of the time, use is without the keyboard. I also added a toolbar at the bottom of the screen to scroll up above the keyboard. A button on the toolbar dismisses the keyboard. This last part works fine with the keyboard going up and down using a notification and the following code in a keyboardWillShow method: [UIView beginAnimations:@"showKeyboardAnimation" context:nil]; [UIView setAnimationDuration:0.50]; self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height - 216); [UIView commitAnimations]; But with the above code, the 2 sections of the tableView remain unscrolled, only the toolbar and the keyboard move. With the following code (found both in previous posts), both the toolbar and the tableView sections move. [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.50]; CGRect rect = self.view.frame; rect.origin.y -= 216; self.view.frame = rect; [UIView commitAnimations]; Now I know that I have to tweak the numbers to get the everything as I want it but my first question is what is substantively different between the 2 sets of code that the sections move in the 2nd but not in the 1st? The toolbar also moves with the 2nd code. The second question is, am I going to be able to scroll the smaller height section from off the screen to above the keyboard while at the same time moving the toolbar up just 216? Thanks

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• Is there a W3C valid way to disable autocomplete in a HTML form?

  - by matt b

  When using the xhtml1-transitional.dtd doctype, collecting a credit card number with the following HTML <input type="text" id="cardNumber" name="cardNumber" autocomplete='off'/> will flag a warning on the W3C validator: there is no attribute "autocomplete". Is there a W3C / standards way to disable browser auto-complete on sensitive fields in a form?

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• Element binding in Silverlight

  - by Matt

  Where can I find some good documentation on data/element binding? My Google searches haven't turned much up. I had a custom class with two properties named Text and Value. When I tried binding a list to a listbox it wouldn't work. By chance I modifed my datatemplate from this <TextBox Text="{Binding Text}"></TextBox> to this <TextBox Text="{Binding Path=Text}"></TextBox> and then everything worked great. I need some indepth documenation/samples to data/element binding. I don't understand why some examples have the path set whereas others do not. A full explanation of this, and all other nice to know tips would be much appreciated.

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• DataContext, DataBinding and Element Binding in Silverlight

  - by Matt

  I'm having one hell of a time trying to get my databinding to work correctly. I have reason to believe that what I'm trying to accomplish can't be done, but we'll see what answers I get. I've got a UserControl. This UserControl contains nothing more than a button. Now within the code behind, I've got a property name IsBookmarked. When IsBookmarked is set, code is run that animates the look of the button. The idea is that you click the button and it visually changes. We'll call this UserControl a Bookmark control. Now I have another control, which we'll call the FormControl. My FormControl contains a child Bookmark control. I've tried to do databinding on my Bookmark control, but it's not working. Here's some code to help you out. <UserControl ......> <q:Bookmark x:Name="BookMarkControl1" IsBookmarked="{Binding IsSiteBookmarked}" /> </UserControl> public void Control_Loaded(object sender, EventArgs e) { DataContext = new Employee { IsSiteBookmarked = True }; } public partial class Bookmark : UserControl { bool _IsSiteBookmarked= false; public bool IsSiteBookmarked { get {return _IsSiteBookmarked;} set { _IsSiteBookmarked= value; SwitchMode(value); } } }

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• UnsatisfiedLinkError: The specified procedure could not be found

  - by matt

  I'm writing some JNI code in C++ to be called from an applet on Windows XP. I've been able to successfully run the applet and have the JNI library loaded and called, even going so far as having it call functions in other DLLs. I got this working by setting up the PATH system environment variable to include the directory all of my DLLs are in. So, the problem, is that I add another call that uses a new external DLL, and suddenly when loading the library, an UnsatisfiedLinkError is thrown. The message is: 'The specified procedure could not be found'. This doesn't seem to be a problem with a missing dependent DLL, because I can remove a dependent DLL and get a different message about dependent DLL missing. From what I've been able to find online, it appears that this message means that a native Java function implementation is missing from the DLL, but it's odd that it works fine without this extra bit of code. Does anyone know what might be causing this? What kinds of things can give a 'The specified procedure could not be found' messages for an UnsatisifedLinkError?

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• Mibble MIB Parser - extracting comments from the mib.

  - by this.matt

  I am using the Mibble MIB Parser to extract all simple data types from an MIB file. I've been successful until my attempt to extract comment text. Take the following module as an example: invBookList OBJECT-TYPE SYNTAX INTEGER { mobydick(1), -- call me ishmael paradiselost(2), -- aComment 1984(3), -- aComment solaris(4) -- aComment } MAX-ACCESS read-only STATUS current DESCRIPTION "A few Books for an example." ::= { invMasterList 43 } According to Mibble's API, the OBJECT-TYPE can be accessed by extracting an SnmpObjectType and then calling the appropriate getter method. Which I have done, and can successfully extract all of the text except the comments in the INTEGER syntax. I have tried calling getSyntax().getComment() on the SnmpObjectType, but always returns null. getSyntax() will extract the INTEGER syntax, e.g.: mobydick(1),paradiselist(2),1984(3),solaris(4) but unfortunately strips out the comments. Any one out there have experience with Mibble Parser who knows how to extract the comments? Many Thanks.

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• Implicitly invoking parent class initializer

  - by Matt Joiner

  class A(object): def __init__(self, a, b, c): #super(A, self).__init__() super(self.__class__, self).__init__() class B(A): def __init__(self, b, c): print super(B, self) print super(self.__class__, self) #super(B, self).__init__(1, b, c) super(self.__class__, self).__init__(1, b, c) class C(B): def __init__(self, c): #super(C, self).__init__(2, c) super(self.__class__, self).__init__(2, c) C(3) In the above code, the commented out __init__ calls appear to the be the commonly accepted "smart" way to do super class initialization. However in the event that the class hierarchy is likely to change, I have been using the uncommented form, until recently. It appears that in the call to the super constructor for B in the above hierarchy, that B.__init__ is called again, self.__class__ is actually C, not B as I had always assumed. Is there some way in Python-2.x that I can overcome this, and maintain proper MRO when calling super constructors without actually naming the current class?

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• Testing a Doctrine2 Entity with assertEquals results in fatal out-of-memory error

  - by Matt

  I have a PHPUnit test that's using a Doctrine2 custom repository and Doctrine Fixtures. I wanted to test that a query gave me back an expected entity from my fixture. But when I try $this->assertEquals($expectedEntity, $result);, I get Fatal error: out of memory. I'm guessing it is recursing into all the relations and the entity manager and whatnot. Is there a good way to test this equality? Should I just assertEquals on the IDs of the entities?

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• Linq to SQL Error with Many-to-Many table

  - by Matt Connolly

  I am getting the following error with linq-to-sql when I try to access a many-to-many collection: Members 'Int32 XXX' and 'Int32 YYY' both marked as IsPrimaryKey and IsDbGenerated. The statement is true, in that both of those columns are primary key integers with identity insert. The table I am trying to access has a foreign key to both YYY and ZZZ, and then ZZZ has a foreign key to XXX. There doesn't appear to be anything wrong with my data structure. I tried setting "Child Property" to false on the ZZZ-YYY relationship, but it didn't change anything.

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• warnings emitted during 'easy_install'

  - by Matt Anderson

  When I easy_install some python modules, warnings such as: <some module>: module references __file__ <some module>: module references __path__ <some module>: module MAY be using inspect.trace <some module>: module MAY be using inspect.getsourcefile sometimes get emitted. Where (what package / source file) do these messages come from? Why is referencing __file__ or __path__ considered a bad thing?

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• Use ASP.Net server control code generation from .ashx

  - by Matt Dawdy

  I'm trying to take an existing bunch of code that was previously on a full .aspx page, and do the same stuff in a .ashx handler. The code created an HtmlTable object, added rows and cells to those rows, then added that html table the .aspx's controls collection, then added it to a div that was already on the page. I am trying to keep the code in tact but instead of putting the control into a div, actually generate the html and I'll return that in a big chunk of text that can be called via AJAX client-side. HtmlTable errors out when I try to use the InnerHtml property (says it isn't supported), and when I try RenderControl, after making first a TextWriter and next an HtmlTextWriter object, I get the error that Page cannot be null. Has anyone done this before? Any suggestions?

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• mysql create table help with unique

  - by Matt

  I'm trying to create a table, and can't figure out how to assign two columns to be unique.. I know how to alter a table thats already created, but how do you do it in the create.. im after a create if not exist col1 TEXT, col2 TEXT, col3 TEXT unique(col1, col2) ^very rough basic but you get the idea

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• Change color of NSTableViewCell

  - by Matt S.

  How can I change the color of a cell in my NSTableView?

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• Using xsi:nil in XML

  - by Matt

  I am generating an XML file from a VB.NET app. The document was generating fine before I tried to add nillable elements. I am now testing putting in just one nil element as: <blah xsi:nil="true"></blah> Once this element is in place and I try to view the XML file in IE it is unable to display. I am receiving: > The XML page cannot be displayed > Cannot view XML input using XSL style > sheet. Please correct the error and > then click the Refresh button, or try > again later. > > -------------------------------------------------------------------------------- > > The operation completed successfully. > Error processing resource If I remove this one element it displays fine again. What am I missing here?

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• Flash/AIR AS3: comparing contents of Screen.screens

  - by matt lohkamp

  In a sane world, this works as expected: var array:Array = ['a','b','c]; trace(array.indexOf(array[0])); // returns 0 In an insane world, this happens: trace(Screen.screens.indexOf(Screen.screens[0])); // returns -1 ... if Screen.screens is an Array of the available instances of Screen, why can't that array give an accurate indexOf one of its own children? edit - apparently to get back to the world of the sane, all you have to do is this: var array:Array = Screen.screens; trace(array.indexOf(array[0])); // returns 0 Anyone know why?

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• How do you convert date taken from a bash script to milliseconds in a Java program?

  - by Matt Pascoe

  I am writing a piece of code in Java that needs to take a time sent from a bash script and parse the time to milliseconds. When I check the millisecond conversion on the date everything is correct except for the month I have sent which is January instead of March. Here is the variable I create in the bash script, which later in the script I pass to the Java program: TIME=`date +%m%d%Y_%H:%M:%S` Here is the Java code which parses the time to milliseconds: String dt = "${scriptstart}"; java.text.SimpleDateFormat scriptStart = new java.text.SimpleDateFormat("MMDDyyyy_HH:mm:ss"); long start = scriptStart.parse(dt).getTime(); The goal of this statement is to find the elapsed time between the start of the script and the current system time. To troubleshoot this I printed out the two: System Time = 1269898069496 (converted = Mon Mar 29 2010 16:27:49 GMT-0500 (Central Daylight Time)) Script Start = 03292010_16:27:45 Script Start in Milli = 1264804065000 (Converted = Fri Jan 29 2010 16:27:45 GMT-0600 (Central Standard Time))

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