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  • MS Surface Tag Visualizer steals contact events

    - by Isak Savo
    I'm struggling with the TagVisualizer control on an MS Surface project. In theory the control seems great, allowing you to respond to input from real world physical objects The problem is that the control will cover the entire screen (since I want to capture tags on the entire screen) and as such, no other controls in my app will receive the touch events. (Unless, they are direct ascendants in the visual tree). In my app, I want to have a "layer" type of a approach, where each layer can respond to (contact) input: Window `- Grid `- LayersPanel `- TagVisualizer `- Layer 1 `- Layer 2 `- Layer 3 `- Layer 4 Now it doesn't matter where I put the tag visualizer, it's always going to steal contact events from all or some of the other layers. (due to the nature of RoutedEvents) To me, it seems like the control is completely useless in practice as it will always interfere with your application's other controls. What am I missing here? So my questions are: Any suggestions on how to work around this? Has anyone used TagVisualizers in a similar scenario? If so, how did you solve this? By the way, the layers all work fine, since they will only steal events that are directly on top of their sub elements (the rest of the layer is invisible to hit testing)

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  • Best way for programmers to edit XAML

    - by JessicaB
    I was wondering how programmers chose to edit XAML. Most of the programmers I speak to seem to edit the raw XML, but that seems nuts to me since it is such a natural thing for a more visual editor (of course you often have to get down to the raw code ultimately, but isn't there a better way to lay out a grid, or edit a template, or add non c# triggers or manage commands? The one that really set me off was editing a menu -- Visual Studio 1.0 had a better menu editor for C++ than the raw XAML editing experience.) When I edit .aspx files I use a visual editor much of the time, and then for the raw stuff I get into the html code. I am aware of Expression Blend, but that seems far more focused on artistic types and GUI experts rather than programmers. Does anyone have recommendations for a better editor for XAML than VS? Especially so since VS seems to have real nasty problems with XAML editing too, like bugginess and poor performance? Appreciate your helping this XAML newbie.

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  • How do I get the ListBox from a ListBoxItem?

    - by Shimmy
    Sub FindAncestor(Of TParent, reference As DependencyObject) As TParent 'find the parent ListBox container End Sub 'Usage Sub Handle(lbi As ListBoxItem) Dim lb = GetListBox(lbi) End Sub I have a button in a ListBoxItem datatemplate, I want in the handler of the button to access the parent ListBox (this is the way I want to access it, since it's all nested in other DataTemplates, ItemsControls and stuff).

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  • Bind Command to MenuItem

    - by Neir0
    Hi I have ListView and i am trying to bind command to ContextMenu of ListView. <ListView x:Name="listView1" ItemsSource="{Binding Path=Persons}"> <ListView.Resources> <ContextMenu x:Key="ItemContextMenu"> <MenuItem Header="Add" /> <MenuItem Header="Edit"/> <Separator/> <MenuItem Header="Delete" Command="{Binding Msg}" /> </ContextMenu> </ListView.Resources> <ListView.ItemContainerStyle> <Style TargetType="ListViewItem"> <!--<EventSetter Event="PreviewMouseLeftButtonDown" />--><!--Handler="OnListViewItem_PreviewMouseLeftButtonDown" />--> <Setter Property="ContextMenu" Value="{StaticResource ItemContextMenu}"/> <Setter Property="HorizontalContentAlignment" Value="Stretch" /> </Style> </ListView.ItemContainerStyle> <ListView.View> <GridView> <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Path=Name}" /> <GridViewColumn Header="Sur Name" DisplayMemberBinding="{Binding Path=SurName}" /> <GridViewColumn Header="Age" DisplayMemberBinding="{Binding Path=Age}" /> </GridView> </ListView.View> </ListView> <Button Content="Message" Command="{Binding Msg}" /> Binding to Button works well but when i click to delete item in ContextMenu, command is not working! Why?

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  • Replace delimited block of text in file with the contents of another file

    - by rmarimon
    I need to write a simple script to replace a block of text in a configuration file with the contents of another file. Let's assume with have the following simplified files: server.xml <?xml version='1.0' encoding='UTF-8'?> <Server port="8005" shutdown="SHUTDOWN"> <Service name="Catalina"> <Connector port="80" protocol="HTTP/1.1"/> <Engine name="Catalina" defaultHost="localhost"> <!-- BEGIN realm --> <sometags/> <sometags/> <!-- END realm --> <Host name="localhost" appBase="webapps"/> </Engine> </Service> </Server> realm.xml <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> I want to run a script and have realm.xml replace the contents between the <!-- BEGIN realm --> and <!-- END realm --> lines. If realm.xml changes then whenever the script is run again it will replace the lines again with the new contents of realm.xml. This is intended to be run in /etc/init.d/tomcat on startup of the service on multiple installations on which the realm is going to be different. I'm not so sure how can I do this simply with awk or sed.

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  • Why does my IMultiBindingConverter get an array of strings when used to set TextBox.Text?

    - by mcohen75
    Hi- I'm trying to use a MultiBinding with a converter where the child elements also have a converter. The XAML looks like so: <TextBlock> <TextBlock.Text> <MultiBinding Converter="{StaticResource localizedMessageConverter}" ConverterParameter="{x:Static res:Resources.RecordsFound}" > <Binding Converter="{StaticResource localizedMessageParameterConverter}" ConverterParameter="ALIAS" Path="Alias" Mode="OneWay" /> <Binding Converter="{StaticResource localizedMessageParameterConverter}" ConverterParameter="COUNT" Path="Count" Mode="OneWay" /> </MultiBinding> </TextBlock.Text> The problem I'm facing here is, whenever this is used with a TextBlock to specify the Text property, my IMultiValueConverter implementation gets an object collection of strings instead of the class returned by the IValueConverter. It seems that the ToString() method is called on the result of the inner converter and passed to the IMultiValueConverter. If used to specify the Content property of Label, all is well. It seems to me that the framework is assuming that the return type will be string, but why? I can see this for the MultiBinding since it should yield a result that is compatible with TextBlock.Text, but why would this also be the case for the Bindings inside a MultiBinding? If I remove the converter from the inner Binding elements, the native types are returned. In my case string and int.

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  • dummy IVR for testing vxml

    - by Nippysaurus
    Voxeo provide a free IVR for development purposes, but I was wondering if there is a much simpler form of test IVR, perhaps which runs on the local machine and uses your microphone and speakers instead of the telephony network?

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  • The uncatchable exception

    - by chaiguy
    Another custom MarkupExtension binding question... This time, my converter is being called before DataContext is set on the target element. This isn't a big deal because it will get updated when DataContext eventually receives a value. What is causing problems is the NullReferenceException I'm getting because of DataContext being null. Even though I'm attempting to catch the exception in my value converter: try { return ( (MethodInfo)_member ).Invoke( parameter, null ); } catch { return Binding.DoNothing; } For some reason the debugger is still halting at this point. Now I'm thinking it could be because the exception is happening in another assembly from where it is being caught (I'm trying to package this in a reusable class library, and _member above points to a method in the application assembly). If I run my little test app without the debugger it works fine, however my application is a little more robust and has general exception handling which is getting triggered because of this. I'm wondering if there is just some attribute or something (or perhaps some reflection parameter I'm missing?) I can use to make the exception be caught like it's supposed to.

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  • Trigger doesn't work

    - by Pasha
    Hello everyone, I have an user control, It is editable text block. The content of the control is: <DataTemplate x:Key="DisplayModeTemplate"> <TextBlock Text="{Binding ElementName=mainControl, Path=FormattedText}" Margin="5,3,5,3" /> </DataTemplate> <Style TargetType="{x:Type Controls:EditableTextBlock}"> <Setter Property="ContentTemplate" Value="{StaticResource EditModeTemplate}"/> <Style.Triggers> <Trigger Property="IsInEditMode" Value="True"> <Setter Property="ContentTemplate" Value="{StaticResource EditModeTemplate}" /> </Trigger> <Trigger Property="IsInEditMode" Value="False"> <Setter Property="ContentTemplate" Value="{StaticResource DisplayModeTemplate}" /> </Trigger> </Style.Triggers> </Style> </UserControl.Resources> Also i have another window with tree view: When treeView1_KeyDown fires I set IsInEditMode to true, but it seems that trigger doesn't work, because content template don't change. Anyone, please explain me why?

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  • Why do I get a NullReferenceException when using a style on a ContentPresenter?

    - by Robert Rossney
    I've created this template, which uses a style applied to the ContentPresenter so that I can bind the data object's Column property to Grid.Column, allowing the items to determine for themselves which column of the Grid they go into: <DataTemplate DataType="{x:Type local:MyObject}"> <ItemsControl ItemsSource="{Binding Items}"> <ItemsControl.Resources> <Style TargetType="{x:Type ContentPresenter}"> <Setter Property="Grid.Column" Value="{Binding Column}" /> </Style> </ItemsControl.Resources> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> <ColumnDefinition Width="*" /> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> </Grid> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> </DataTemplate> When I run the program, I get a NullReferenceException. The beginning of the hilariously long stack trace: at System.Windows.StyleHelper.ApplyAutoAliasRules(OptimizedTemplateContent optimizedTemplateContent, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& resourceDependents, HybridDictionary& dataTriggerRecordFromBinding, Boolean& hasInstanceValues) at System.Windows.StyleHelper.ProcessTemplateContent(FrameworkTemplate frameworkTemplate, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& resourceDependents, ItemStructList`1& eventDependents, HybridDictionary& dataTriggerRecordFromBinding, HybridDictionary childIndexFromChildID, Boolean& hasInstanceValues) at System.Windows.StyleHelper.SealTemplate(FrameworkTemplate frameworkTemplate, Boolean& isSealed, FrameworkElementFactory templateRoot, TriggerCollection triggers, ResourceDictionary resources, HybridDictionary childIndexFromChildID, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& containerDependents, FrugalStructList`1& resourceDependents, ItemStructList`1& eventDependents, HybridDictionary& triggerActions, HybridDictionary& dataTriggerRecordFromBinding, Boolean& hasInstanceValues, EventHandlersStore& eventHandlersStore) at System.Windows.FrameworkTemplate.Seal() at System.Windows.StyleHelper.UpdateTemplateCache(FrameworkElement fe, FrameworkTemplate oldTemplate, FrameworkTemplate newTemplate, DependencyProperty templateProperty) at System.Windows.Controls.ContentPresenter.OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) ...etc. It's not the binding. I still get the error if I explicitly set the value in the style's setter to 0, say. And the error vanishes if I remove the style, though then all of the items end up in column 0. What's going on here? And how do I debug a problem like this?

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  • How to add text to path?

    - by Pritorian
    Hi all. Te question is how to add text to path element. For example, I have path: Path firstPath = new Path(); firstPath.Stroke = Brushes.Black; firstPath.StrokeThickness = 1; myCanvas.Children.Add(firstPath); LineGeometry firstLine = new LineGeometry(); firstPath.Data = firstLine; And somewhere I define line's Start and End point's. The path is binded to controls (for example - two ellipses) and when I drag one of them, the line is dynamically resized and moved to be pinned to both objects. And now I wand to add some text, that would fit to this line and follow it. Any recommendations how to do this?

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  • Setting TreeView.DataContext doesn't refresh the tree

    - by dan gibson
    I have a List that I've bound to a TreeView. Setting TreeView.DataContext works - everything displays correctly. I then change the list (add an item to it) and set TreeView.DataContext again (to the same value) but the tree does not refresh with the new items. How do I get the treeview to refresh? This is basically my code: public class xItemCollection : ObservableCollection<xItem> { } public class xItem : INotifyPropertyChanged { xItemCollection _Items; public xItem() { _Items = new xItemCollection(); } public xItemCollection Items {get{return _Items;}} } ... this.RootItem = new xItem(); treeView.DataContext = this; Adding items to the list works until the tree is rendered for the first time. After it is rendered, adding/removing items does not refresh the tree.

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  • Extracting email addresses in an html block in ruby/rails

    - by corroded
    I am creating a parser that wards off against spamming and harvesting of emails from a block of text that comes from tinyMCE (so it may or may not have html tags in it) I've tried regexes and so far this has been successful: /\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i problem is, i need to ignore all email addresses with mailto hrefs. for example: <a href="mailto:[email protected]">[email protected]</a> should only return the second email add. To get a background of what im doing, im reversing the email addresses in a block so the above example would look like this: <a href="mailto:[email protected]">moc.liam@tset</a> problem with my current regex is that it also replaces the one in href. Is there a way for me to do this with a single regex? Or do i have to check for one then the other? Is there a way for me to do this just by using gsub or do I have to use some nokogiri/hpricot magicks and whatnot to parse the mailtos? Thanks in advance! Here were my references btw: so.com/questions/504860/extract-email-addresses-from-a-block-of-text so.com/questions/1376149/regexp-for-extracting-a-mailto-address im also testing using this: http://rubular.com/ edit here's my current helper code: def email_obfuscator(text) text.gsub(/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/i) { |m| m = "<span class='anti-spam'>#{m.reverse}</span>" } end which results in this: <a target="_self" href="mailto:<span class='anti-spam'>moc.liamg@tset</span>"><span class="anti-spam">moc.liamg@tset</span></a>

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  • ContentControl + RenderTargetBitmap + empty image

    - by Kellls
    Im trying to create some chart images without ever displaying those charts on the screen. I'v been at this for quite a while and tried a lot of different things but nothing seems to work. The code works perfectly if I display the chart in a window first, but if I don't display it in a window, the bitmap is just white with a black border (no idea why). I have tried adding the chart to a border before rendering and giving the border a green borderBrush. In the bitmap, I see the green borderBrush then the black border and white background but no chart. I don't know where the black border is coming from as the chart is not contained in a black border. I have tried adding the chart to a window without calling window.Show() and again just the black boarder and white background. However if I call window.Show() the bitmap contains the chart. I have tried using a drawingVisual as explained here, same result. Here is the code (not including adding the element to a border or window): private static BitmapSource CreateElementScreenshot(FrameworkElement element, int dpi) { if (!element.IsMeasureValid) { Size size = new Size(element.Width, element.Height); element.Measure(size); element.Arrange(new Rect(size)); } element.UpdateLayout(); var scale = dpi/96.0; var renderTargetBitmap = new RenderTargetBitmap ( (int)(scale * element.RenderSize.Width),(int)(scale * element.RenderSize.Height),dpi,dpi,PixelFormats.Default ); // this is waiting for dispatcher to perform measure, arrange and render passes element.Dispatcher.Invoke(((Action)(() => renderTargetBitmap.Render(element))), DispatcherPriority.Render); return renderTargetBitmap; } Note: The chart is a ContentControl. Is there anyway I can get the chart to render without displaying it in a window first?

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  • How to set Height of items in XAML so they always occupy the same proportion of available space in p

    - by aoven
    I have an ItemsControl with the following ItemTemplate: <DataTemplate x:Key="myItemTemplate"> <TextBlock Height="???" Text="{Binding Path=Description}" /> </DataTemplate> My question is, how do I set the Height of the TextBlock in the template so that it automatically assumes ItemsControl.Height div ItemsCount amount of vertical space? When there's only one item, I'd like it to be the full height of container, when there're two, each should be half the size, and so on. If possible, I'd prefer to do this completely in XAML to keep my ViewModel clean of UI logic.

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  • Filtering Filenames with bash

    - by Stefan Liebenberg
    I have a directory full of log files in the form ${name}.log.${year}{month}${day} such that they look like this: logs/ production.log.20100314 production.log.20100321 production.log.20100328 production.log.20100403 production.log.20100410 ... production.log.20100314 production.log.old I'd like to use a bash script to filter out all the logs older than x amount of month's and dump it into *.log.old X=6 #months LIST=*.log.*; for file in LIST; do is_older = file_is_older_than_months( ${file}, ${X} ); if is_older; then cat ${c} >> production.log.old; rm ${c}; fi done; How can I get all the files older than x months? and... How can I avoid that *.log.old file is included in the LIST attribute? Thank you Stefan

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  • MVVM: Thin ViewModels and Rich Models

    - by Dan Bryant
    I'm continuing to struggle with the MVVM pattern and, in attempting to create a practical design for a small/medium project, have run into a number of challenges. One of these challenges is figuring out how to get the benefits of decoupling with this pattern without creating a lot of repetitive, hard-to-maintain code. My current strategy has been to create 'rich' Model classes. They are fully aware that they will be consumed by an MVVM pattern and implement INotifyPropertyChanged, allow their collections to be observed and remain cognizant that they may always be under observation. My ViewModel classes tend to be thin, only exposing properties when data actually needs to be transformed, with the bulk of their code being RelayCommand handlers. Views happily bind to either ViewModels or Models directly, depending on whether any data transformation is required. I use AOP (via Postsharp) to ease the pain of INotifyPropertyChanged, making it easy to make all of my Model classes 'rich' in this way. Are there significant disadvantages to using this approach? Can I assume that the ViewModel and View are so tightly coupled that if I need new data transformation for the View, I can simply add it to the ViewModel as needed?

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  • Find all words containing characters in UNIX

    - by fahdshariff
    Given a word W, I want to find all words containing the letters in W from /usr/dict/words. For example, "bat" should return "bat" and "tab" (but not "table"). Here is one solution which involves sorting the input word and matching: word=$1 sortedWord=`echo $word | grep -o . | sort | tr -d '\n'` while read line do sortedLine=`echo $line | grep -o . | sort | tr -d '\n'` if [ "$sortedWord" == "$sortedLine" ] then echo $line fi done < /usr/dict/words Is there a better way? I'd prefer using basic commands (instead of perl/awk etc), but all solutions are welcome! To clarify, I want to find all permutations of the original word. Addition or deletion of characters is not allowed.

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  • WPF- Why can't my custom textbox be selected?

    - by highone
    I have this custom textbox that I am working on and I can use it in xaml, but when I run my app I cannot select it or type in it. Here is my code: public class ModdedTextBox : TextBox { private bool selectionStartChangeFromUI; private bool selectionLengthChangeFromUI; private bool selectedTextChangeFromUI; static ModdedTextBox() { DefaultStyleKeyProperty.OverrideMetadata(typeof(ModdedTextBox), new FrameworkPropertyMetadata(typeof(ModdedTextBox))); //this.SelectionChanged += this.OnSelectionChanged; //PropertyDescriptor VerticalOffsetProperty = TypeDescriptor.GetProperties(typeof(ModdedTextBox))["VerticalOffset"]; //VerticalOffsetProperty.AddValueChanged(this, this.OnVerticalOffsetChanged); } public static readonly DependencyProperty BindableSelectionStartProperty = DependencyProperty.Register( "BindableSelectionStart", typeof(int), typeof(ModdedTextBox), new PropertyMetadata(OnBindableSelectionStartChanged)); public static readonly DependencyProperty BindableSelectionLengthProperty = DependencyProperty.Register( "BindableSelectionLength", typeof(int), typeof(ModdedTextBox), new PropertyMetadata(OnBindableSelectionLengthChanged)); public static readonly DependencyProperty BindableSelectedTextProperty = DependencyProperty.Register( "BindableSelectedText", typeof(string), typeof(ModdedTextBox), new PropertyMetadata(OnBindableSelectedTextChanged)); public static readonly DependencyProperty DelayedTextProperty = DependencyProperty.Register( "DelayedText", typeof(string), typeof(ModdedTextBox), new PropertyMetadata(OnDelayedTextChanged)); public int BindableSelectionStart { get { return (int)this.GetValue(BindableSelectionStartProperty); } set { this.SetValue(BindableSelectionStartProperty, value); } } public int BindableSelectionLength { get { return (int)this.GetValue(BindableSelectionLengthProperty); } set { this.SetValue(BindableSelectionLengthProperty, value); } } public string BindableSelectedText { get { return (string)this.GetValue(BindableSelectedTextProperty); } private set { this.SetValue(BindableSelectedTextProperty, value); } } public string DelayedText { get { return (string)this.GetValue(DelayedTextProperty); } private set { this.SetValue(DelayedTextProperty, value); } } private static void OnBindableSelectionStartChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args) { var textBox = dependencyObject as ModdedTextBox; if (!textBox.selectionStartChangeFromUI) { int newValue = (int)args.NewValue; textBox.SelectionStart = newValue; } else { textBox.selectionStartChangeFromUI = false; } } private static void OnBindableSelectionLengthChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args) { var textBox = dependencyObject as ModdedTextBox; if (!textBox.selectionLengthChangeFromUI) { int newValue = (int)args.NewValue; textBox.SelectionLength = newValue; } else { textBox.selectionLengthChangeFromUI = false; } } private static void OnBindableSelectedTextChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args) { var textBox = dependencyObject as ModdedTextBox; if (!textBox.selectedTextChangeFromUI) { string newValue = (string)args.NewValue; textBox.BindableSelectedText = newValue; } else { textBox.selectedTextChangeFromUI = false; } } private static void OnDelayedTextChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs args) { } private void OnSelectionChanged(object sender, RoutedEventArgs e) { if (this.BindableSelectionStart != this.SelectionStart) { this.selectionStartChangeFromUI = true; this.BindableSelectionStart = this.SelectionStart; } if (this.BindableSelectionLength != this.SelectionLength) { this.selectionLengthChangeFromUI = true; this.BindableSelectionLength = this.SelectionLength; } if (this.BindableSelectedText != this.SelectedText) { this.selectedTextChangeFromUI = true; this.BindableSelectedText = this.SelectedText; } } private void OnVerticalOffsetChanged(object sender, EventArgs e) { MessageBox.Show("hello the vertical offset works"); } }

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  • Calling a datatrigger for a radio button inside a datagrid

    - by Farax
    I have a datagrid with one column having a radio button. I want to set the GroupName when a certain condition is reached. Below is the code <Custom:DataGrid.Columns> <!-- ONLY ENABLED WHEN THE ITEM TYPE IS SINGLESELECT OR SINGLESELECT WITH ADDIOTIONAL DATA--> <Custom:DataGridTemplateColumn CanUserResize="False" MinWidth="20" > <Custom:DataGridTemplateColumn.CellTemplate> <DataTemplate> <RadioButton IsChecked="{Binding IsChecked}" d:DesignWidth="16" d:DesignHeight="16" GroupName="SingleChoiceSelection" Template="{DynamicResource RadioButtonTemplate}" Background="{DynamicResource BackgroundNew}" BorderBrush="#FF7A7171" Foreground="#FF6C6C6C" Margin="0" /> </DataTemplate> </Custom:DataGridTemplateColumn.CellTemplate> </Custom:DataGridTemplateColumn> <Custom:DataGridTextColumn Header="Choices" Binding="{Binding ChoiceText}" CellStyle="{DynamicResource DataGridCellStyle2}" MinWidth="150" /> </Custom:DataGrid.Columns> </Custom:DataGrid> The ItemSource contains a property called isChecked and I want to change the foreground color when isChecked is changed to true. How do i do this with a datatrigger?

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  • Win32 API Programming - Is it worth ?

    - by nXqd
    Now I code win32 api windows explorer . But it seems quite hard to me.I've a month to do it. But through the time I code, I wonder is it worth that I code win32 api ? . When we can create GUI easily with MFC or even easier with C#. What should I do ? 1- Keep coding with win32 api to deeply understand about them. 2- Just learn and code some programs to understand how they work. Can you determine how many time does it take in each choice ( or how many projects ). Thx for reading, as a 2nd student of IT University I really want your advice in this. My purpose is becoming a good and effective programmer :) PS: recommended books are really appreciated.

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  • Binding a property to change the listbox items foreground individually for each item

    - by Eyal-Shilony
    I'm trying to change the foreground color of the items in the ListBox individually for each item, I've already posted a similar question but this one is more concrete. I hoped that the state of the color is reserved for each item added to the ListBox, so I tried to create a property (in this case "HotkeysForeground"), bind it and change the color when the items are added in the "HotkeyManager_NewHotkey" event, the problem it's changing the foreground color for all the items in the ListBox. How can I do that per item ? Here is the ViewModel I use. namespace Monkey.Core.ViewModel { using System; using System.Collections.ObjectModel; using System.Windows.Media; using Monkey.Core.SystemMonitor.Accessibility; using Monkey.Core.SystemMonitor.Input; public class MainWindowViewModel : WorkspaceViewModel { private readonly FocusManager _focusManager; private readonly HotkeyManager _hotkeyManager; private readonly ObservableCollection<string> _hotkeys; private Color _foregroundColor; private string _title; public MainWindowViewModel() { _hotkeys = new ObservableCollection<string>(); _hotkeyManager = new HotkeyManager(); _hotkeyManager.NewHotkey += HotkeyManager_NewHotkey; _focusManager = new FocusManager(); _focusManager.Focus += FocusManager_Focus; } public Color HotkeysForeground { get { return _foregroundColor; } set { _foregroundColor = value; OnPropertyChanged(() => HotkeysForeground); } } public ReadOnlyObservableCollection<string> Hotkeys { get { return new ReadOnlyObservableCollection<string>(_hotkeys); } } public string Title { get { return _title; } set { _title = value; OnPropertyChanged(() => Title); } } protected override void OnDispose() { base.OnDispose(); _hotkeyManager.Dispose(); _focusManager.Dispose(); } private void FocusManager_Focus(object sender, FocusManagerEventArgs e) { Title = e.Title; } private void HotkeyManager_NewHotkey(object sender, EventArgs eventArgs) { HotkeysForeground = _hotkeys.Count <= 2 ? Colors.Blue : Colors.Brown; _hotkeys.Clear(); foreach (var hotkey in _hotkeyManager.GetHotkeys()) { _hotkeys.Add(hotkey); } } } } Here is the view. <Window x:Class="Monkey.View.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:System="clr-namespace:System;assembly=mscorlib" Title="{Binding Mode=OneWay, Path=Title, UpdateSourceTrigger=PropertyChanged}" Height="200" Width="200" ShowInTaskbar="False" WindowStyle="ToolWindow" Topmost="True" ResizeMode="CanResizeWithGrip" AllowsTransparency="False"> <Window.Resources> <SolidColorBrush Color="{Binding HotkeysForeground}" x:Key="HotkeysBrush"/> </Window.Resources> <ListBox Canvas.Left="110" Canvas.Top="74" Name="HotkeyList" Height="Auto" Width="Auto" HorizontalContentAlignment="Left" BorderThickness="0" ScrollViewer.CanContentScroll="False" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled" ItemsSource="{Binding Path=Hotkeys}" VerticalAlignment="Stretch" VerticalContentAlignment="Center" FontSize="20"> <ListBox.ItemContainerStyle> <Style TargetType="ListBoxItem"> <Setter Property="IsEnabled" Value="False" /> </Style> </ListBox.ItemContainerStyle> <ListBox.ItemTemplate> <DataTemplate> <Label Content="{Binding}" Foreground="{StaticResource HotkeysBrush}"/> </DataTemplate> </ListBox.ItemTemplate> </ListBox> </Window> Thank you in advance.

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