We received an interesting feature request in our support department: The ability to open the tab dialog when a user is clicking a tab position in the TXTextControl.RulerBar.

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In order to trap the double-click event in the RulerBar, the position needs to be calculated. In the MouseDoubleClick event, the position related to the document is calculated based on the scroll location and zoom factor.

Then the click location is compared to all tab positions at the current input position. If a tab position matches the click position within a range of 100 twips, the dialog is opened.

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You can download the full sample from our GitHub repository.

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Requirements for This Sample

  • Visual Studio 2017 or better
  • TX Text Control .NET for Windows Forms (trial sufficient)