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Shape Data

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Linking Data to Visio Shapes in Code

One of the most useful capabilities of Visio Professional and Visio Plan 2 is to link external data to shapes and have them refreshed by changes in the data source. So, many of my solutions involve writing code to make these links, and they are covered with some VBA examples in my book, Mastering Data Visualization with Microsoft Visio Professional 2016, but I mostly write C# code in VSTO add-ins, so I thought it would be useful to demonstrate how easy it is to create data links by dropping a shape, and by adding links to an existing shape. The book, by the way, is still relevant for the current Visio Professional and Visio Plan 2 editions!

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Visio Shape Report Converter Excel add-in available

I am delighted to announce that I have just had my first Excel add-in accepted in the Office Add-ins Store! It is called Shape Report Converter because all it does is convert a Shape Report converted from Visio for Desktop to a modern Excel table with one click!

It isn’t a complicated add-in, and it doesn’t do anything that you can’t do manually, but it does save time, and ensures consistency … and it is free!

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Update any Visio ShapeSheet cell with External Data

When Microsoft introduced a new way of linking external data to Visio shapes in 2007, I initially bemoaned the inability to update anything but Shape Data row values, unlike the old database add-on that I had been using for 10 years. The new method, though, has many advantages over the old way, not least that it is part of the Visio code library, for any Visio desktop user except the Standard edition.

The smartness of Visio shapes is derived from the formulas in the ShapeSheet that lies behind everything. There is a developer interface into this ShapeSheet in every desktop edition, but there is none in any of the web editions, even though the formulas, for the most part, work perfectly well (see my series of posts ShapeSheet Functions A-Z ).

The newer methodology of linking Visio shapes to data can also be used to refresh Visio diagrams automatically, even if the Visio document is not opened in the desktop edition. The Visio documents merely need to be stored in OneDrive, SharePoint (or Teams). This makes it suitable for solution development without assuming that every consumer has a desktop license. Indeed, the Visio Data Visualizer utilizes these newer external data recordsets embedded within the Visio document.

For my example, I used the Visio Sample Database that has been installed with Visio since 1997 for demonstrating the old database linking technology. It is an old style Access database (mdb), and can be found in a sub-folder of the Visio installation folder. I simply used the Data \ External Data \ Custom Import command to import the Bolts – Square Head table.

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Understanding Morse Clicks with Visio

A few years ago, I wrote an article about messaging and encryption inspired by a visit to the National Museum of Computing in the UK. I developed a Morse Click shape to demonstrate how Visio can be used to represent and learn Morse Code. However, I never published the shapes here, and my good friend John Marshall recently wrote an article about Braille in Visio, so I thought I should explain how I made the Morse Click shapes, and I took the opportunity to enhance the shapes with some accessibility features that I have learnt since I originally designed them. I have also changed the shapes to be Visio Web friendly, which means, for example, removing shape effects.

I think I learnt Morse Code as a Cub Scout, but forgotten it in the half-century since. Its evolution, and its use today still makes very interesting reading. Each letter comprises of between one and four short or long clicks, whilst each number has five such clicks. Generally, the most used letters have lesser clicks, with ET being the lowest number, presumably to save an extra terrestrial money on a phone call home!

  • Number of Clicks per Character
  • With page Shape Data Hide Text = False

There are just two master shapes of interest here, Morse Click and Morse Click Rack, and a couple of page Shape Data rows. The Morse Click shape can be anyone of the 36 characters with a simple Shape Data value change, whilst the Morse Click Rack is a list shape and can spell out the words of up to 26 Morse Click shapes within it.

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Using a formula for Shape Data labels prevents multiple updates

I have only been developing Visio solutions for 25 years, but I got a surprise this week when I was trying to understand why I couldn’t update the value of a Shape Data row of multiple selected shapes. It is something that I often do, so it took me a while to understand why I was failing to change the values, even though it appeared to initially change in the Shape Data window. There was no problem selecting the shapes individually, but every time I selected multiple shapes and edited these particular rows, I could see the new value in the Shape Data window, but as soon as I looked at the individual shapes, I could see that the values never got changed. I checked my code in vain, and ran the Events Monitor from the Visio SDK. Visio seemed to enter the Shape Data scope, but then immediately exited it without attempting to apply the new value to the shapes. Very strange!

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