How to dynamically resize WPF tab items to fit available width

Useful StackOverflow link: https://stackoverflow.com/questions/28496809/wpf-flexible-tabcontrol-header Step 1: Create a new WPF application Step 2: Create an example adjustable window with tab items Update the MainWindow.xaml to create a grid with a column section containing the tab items and a grid splitter to adjust the width of the tab item area. MainWindow.xaml We will get on to the step of creating the tab control style in a minute... [code language="xml"] <Window x:Class="TabItemResize.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" Title="MainWindow" Height="450" Width="700"> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="5" /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <TabControl Style="{DynamicResource TabControlStyle}" > <TabItem Header="Tab no. 1" /> <TabItem Header="Tab no. 2" /> <TabItem Header="Tab no. 3" /> </TabControl> <GridSplitter Grid.Column="1" ResizeDirection="Columns" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> </Grid> </Window> [/code] Step 3: Create a version of UniformGrid UniformTabPanel.cs Notice the override to obtain the Size object that is governed by the total width of the child TabItems: [code language="csharp"] using System.Linq; using System.Windows; using System.Windows.Controls; using System.Windows.Controls.Primitives; namespace TabItemResize { public class UniformTabPanel : UniformGrid { public UniformTabPanel() { IsItemsHost = true; Rows = 1; HorizontalAlignment = HorizontalAlignment.Stretch; } protected override Size MeasureOverride(Size constraint) { var totalMaxWidth = Children.OfType&lt;TabItem&gt;().Sum(tab =&gt; tab.MaxWidth); if (!double.IsInfinity(totalMaxWidth)) HorizontalAlignment = constraint.Width &gt; totalMaxWidth ? HorizontalAlignment.Left : HorizontalAlignment.Stretch; return base.MeasureOverride(constraint); } } } [/code] Step 4: Create the style for the TabControl App.xaml [code language="xml"] <Application x:Class="TabItemResize.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:TabItemResize" StartupUri="MainWindow.xaml"> <Application.Resources> <Style x:Key="TabControlStyle" TargetType="{x:Type TabControl}"> <Setter Property="SnapsToDevicePixels" Value="True" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type TabControl}"> <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="*" /> </Grid.RowDefinitions> <Border> <local:UniformTabPanel x:Name="HeaderPanel" /> </Border> <Border x:Name="Border" Grid.Row="1" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"> <ContentPresenter x:Name="PART_SelectedContentHost" ContentSource="SelectedContent" /> </Border> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> </Application.Resources> </Application> [/code] On running the application see that the default widths of the tab items are displayed: And dragging across the splitter control the widths of the tab headers are expanded accordingly:

Comments

Post a Comment

Popular posts from this blog

Using the Supervisor Controller Pattern to access View controls in MVVM

Image
As discussed on a StackOverflow post , this is considered bad practice, so only use this when necessary. Step 1: Create a new WPF project Step 2: Add event handling code A number of classes are needed for doing command bindings in MVVM. Create the following classes and add to your Visual Studio project: RelayCommand.cs [code language="csharp"] using System; using System.Windows.Input; namespace SupervisorControllingPattern { public class RelayCommand<T> : ICommand { private readonly Predicate<T> _canExecute; private readonly Action<T> _execute; public RelayCommand(Action<T> execute) : this(execute, null) { _execute = execute; } public RelayCommand(Action<T> execute, Predicate<T> canExecute) { if (execute == null) throw new ArgumentNullException(nameof(execute)); _execute = execute; _canExecute = canExecute; ...
Read more

Getting started with client-server applications in C++

Image
A demonstration of simple Internet client-server applications in C++ (Linux-based). The client application tries to connect to the remote server application using the IP address of the remote server ('localhost' or 127.0.0.1) and the server port number which defaulted to 1234. The server application listens to port number 1234 for a connection request. When the server application receives the connection request it sends the text message "Hello!\r\n" to the client.
Read more

How to send an e-mail via Google SMTP using C#

Image
First things first, some useful StackOverflow links: https://stackoverflow.com/questions/9201239/send-e-mail-via-smtp-using-c-sharp https://stackoverflow.com/questions/17462628/the-server-response-was-5-7-0-must-issue-a-starttls-command-first-i16sm1806350 To demonstrate how this is done I first create a new Visual Studio project: Some example code for sending an email via a Google email account (smtp.goolgle.com) - obviously replace this with email / credentials of your own... I put the code within a try-catch block in order to capture any errors that may occur while attempting this. [code language="csharp"] using System; using System.Net; using System.Net.Mail; namespace EmailSmtp { class Program { static void Main(string[] args) { try { // Credentials var credentials = new NetworkCredential("someEmail@gmail.com", "somePassword"); // Mail message var ...
Read more