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An Extended WPF TabControl

, 5 Apr 2009
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Altering the WPF TabControl to show a single row of scrolling TabItems
Screenshot - TabControl_Default.jpg

Introduction

I recently decided to have a go at changing the built-in WPF TabControl so that it behaves similar to the way in which Internet Explorer 7 works.

The main area I wanted to change was the way in which the TabItems are arranged, currently the built-in TabControl will pack and stack items, so the more items there are, the more room is required for the headers, taking up space from the actual content of the TabItem.

With Internet Explorer 7, tabs remain on a single row and will scroll in and out of view. This is the way I wanted this control to behave.

Properties/Events

There are a few extra properties (Dependency Properties) and events added to the control.

  • AllowAddNew - Setting this property to true will allow the end user to add new tabitems to the control via a button.
  • AllowDelete - Setting this property to true will allow the end user to delete tabitems from the control by clicking on the close button on the selected tabitem.

If the above properties are set to true, there are three events that go with these properties. They are TabItemAdded, TabItemClosing and TabItemClosed: all provide a reference to the TabItem being added/removed, the TabItemClosing event providing a place to cancel the close if required.

  • AddNewTabToEnd - If this property is true, tabitems added using the AddNew button will be added to the end of the row of tabitems, otherwise the new tabitem will be inserted immediately after the current selection.
  • SelectNewTabOnCreate - If this property is true, focus will be moved to the new tabitem when added.

Finally, there are three extra properties of type Brush which are used for coloring the tabitems based on their state:

  • TabItemNormalBackground
  • TabItemMouseOverBackground
  • TabItemSelectedBackground

If you look at the picture at the top of this article, it shows the default style for the TabControl. I've intentionally made this very basic. By just using the extra Background properties, you can easily change the appearance of the TabControl. As this picture shows, by adding a few LinearGradientBrushes, you can get something that resembles Internet Explorer 7.

TabControl_IE7.jpg

There are four properties which take an active part in the arrangement of the tabitems. They are:

  • TabItemMinWidth
  • TabItemMaxWidth
  • TabItemMinHeight
  • TabItemMaxHeight

Arranging the TabItems

There are three ways in which the tabcontrol arranges its tabitems.
The following description is relevant if the TabStripPlacement property is set to Top or Bottom.

  1. If the combined widths of the TabItems is less than the available visible space, then we just arrange them one after the other, taking into account the TabItemMaxWidth and TabItemMinWidth properties.
  2. If the combined widths are greater than visible, then calculate the width required for all the tabitems so that all are visible. If this width is greater than the TabItemMinWidth property, then we arrange the tabitems using this calculated width.
  3. Once we add too many tabitems that their widths would be less than the TabitemMinWidth property, then scrolling will be enabled.

The class that is responsible for arranging the tabitems is the VirtualizingTabPanel. As the name suggests, this panel derives from the VirtualizingPanel class and implements the IScrollInfo interface. I won't describe here what a VirtualizingPanel is, instead I will just direct you to this Blog post by Dan Crevier which describes what it is and how to implement one.

Using the Code

To use the control, you will need to add a reference to the Wpf.TabControl assembly, then add an xmlns to the window:

xmlns:r="clr-namespace:Wpf.Controls;assembly=Wpf.TabControl" 

The demo provided shows how to add the control to a window and set its properties.

History

  • 13-Oct-2007: Initial upload
  • 09-Mar-2009: Implemented ItemsSource binding & bug fixes
  • 05-Apr-2009: Updated source code

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

alrh
Software Developer
United Kingdom United Kingdom
No Biography provided

Comments and Discussions

 
QuestionFix the no of tabs in the tabcontrol Pinmembernajmbe13-Jul-14 21:04 
QuestionHow can I integrate this into the Prism technology? PinmemberVcDeveloper128-May-13 15:38 
GeneralMy vote of 4 Pinmembervanwood26-Feb-13 2:05 
GeneralMy vote of 5 Pinmemberhari111r28-Nov-12 17:55 
QuestionFirst Tab isfixed PinmemberPatrick Blackman20-Jun-12 17:14 
QuestionHow I can use this Tab control in WinApp projects? Pinmemberctrlz-jc13-May-12 18:19 
GeneralMy vote of 5 [modified] PinmemberSteve Aube 126-Dec-11 11:24 
GeneralMy vote of 5 PinmemberKashif_Imran11-Dec-11 0:31 
GeneralMy vote id 5 Pinmemberedallos22-Mar-11 0:46 
GeneralMy vote of 5 PinmemberSlacker0078-Dec-10 7:24 
GeneralModifying tab control to show the selected tabs header in bold [modified] PinmemberACanadian17-Sep-10 9:24 
GeneralMy vote of 4 PinmemberSteven Chen11-Aug-10 6:03 
GeneralMy vote of 5 Pinmemberzokbari2-Aug-10 7:46 
QuestionWhat controls the default xaml when first dropped onto designer? Pinmemberpatc23-Jun-10 16:53 
GeneralProperties TabItemNormalBackground, TabItemMouseOverBackground, TabItemSelectedBackground for each TabItem Pinmemberjiglriv9-May-10 23:42 
GeneralIsFixedSize property question PinmemberMember 45553309-May-10 4:22 
QuestionThank you and a question Pinmembermsabatini28-Apr-10 6:29 
QuestionWhat a good article Pinmembersuperdiablo18-Apr-10 6:17 
GeneralThank you and new functionality implemented PinmemberEvgeny Vinnik2-Jul-09 18:09 
GeneralRe: Thank you and new functionality implemented PinmemberJose Maldonado5-Jan-10 5:38 
GeneralRe: Thank you and new functionality implemented PinmemberMember 155142618-Nov-10 3:30 
GeneralBug: RepeatRight and RepeatLeft buttons do not display in WindowUsingItemsSourceProperty.xaml PinmemberRolenun24-May-09 18:27 
General[My vote of 2] need code snippets and discussion PinmemberDonsw16-Apr-09 6:44 
GeneralRe: [My vote of 2] need code snippets and discussion PinmvpJohn Simmons / outlaw programmer17-Jun-11 2:15 
GeneralMy vote of 2 PinmvpJohn Simmons / outlaw programmer15-Apr-09 2:53 
GeneralRe: My vote of 2 Pinmemberr2d2ro17-Jun-11 0:12 
GeneralRe: My vote of 2 PinmvpJohn Simmons / outlaw programmer17-Jun-11 2:14 
GeneralCrash while resizing/minimizing window PinmemberMember 60381965-Apr-09 1:18 
GeneralRe: Crash while resizing/minimizing window Pinmemberalrh5-Apr-09 4:08 
GeneralAwesome Pinmembernitewulf501-Apr-09 8:32 
This control is amazing. Thank you so much for creating it and sharing with the rest of the development community.
GeneralBlink tab item in changes. PinmemberMorteza_Ar27-Mar-09 2:26 
QuestionExtended Silverlight TabControl PinmemberMohammed Issa9-Mar-09 3:59 
Generaldata binding on ItemsSource PinmemberRavejones25-Feb-09 6:22 
GeneralRe: data binding on ItemsSource Pinmemberalrh11-Mar-09 1:52 
Generalmodification: do not virtualize selected tab Pinmemberchefkokkie14-Feb-09 19:07 
GeneralWPF Chrome causes this to not work. PinmemberMember 44541963-Feb-09 14:13 
AnswerRe: WPF Chrome causes this to not work. [modified] Pinmemberchefkokkie11-Feb-09 20:42 
Answernon-uniform width decrease of tabs Pinmemberchefkokkie3-Feb-09 10:27 
AnswerRepeatLEFT and RepeatRIGHT are reversed Pinmemberchefkokkie2-Feb-09 16:24 
GeneralRe: RepeatLEFT and RepeatRIGHT are reversed PinmemberRolenun24-May-09 18:12 
GeneralWow PinmemberAlomgir Miah Abdul26-Dec-08 6:55 
GeneralScrollViewer property - VerticalScrollBarVisibility="Auto" error Pinmemberbluemoong30-Oct-08 4:30 
GeneralVB Translation PinmemberRiccardoG6-Oct-08 5:16 
GeneralSet Window1's Height=Auto And Width=Auto ,there is an Error! Pinmemberanqincmt7-Jul-08 0:31 
GeneralRe: Set Window1's Height=Auto And Width=Auto ,there is an Error! Pinmemberjutifruti11-Sep-08 4:57 
GeneralRe: Set Window1's Height=Auto And Width=Auto ,there is an Error! PinmemberCool Cassis1-Oct-08 1:13 
QuestionAutoSize HeaderWidth of TabItem PinmemberHorst Klein17-Jun-08 2:26 
QuestionCan be used in XBAP apps? Pinmemberpixel3cs9-May-08 10:17 
Generalimplement data binding feature PinmemberQuang Tran Minh16-Apr-08 0:20 
GeneralRe: implement data binding feature Pinmembericecreman18-Apr-08 4:12 

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