bVisual

bVisual Blog by David Parker

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Parsing XML data in Visio Shapes

One of my current projects uses XML data, and some of the values in the XML data control the display and content of Visio shapes. Therefore, I looked deeper into how the XML data can be used directly to control parts of the graphics.

Although the external data linking feature in Visio Professional and Visio Plan 2 does have the ability to use XML files, the structure of these XML files is in a particular ADO format, and not suitable for the XML data in this project.

Also, Visio documents can have embedded XML data within it, and there are several methods available to work with the XML, such as Document.SolutionXMLElement. In fact, there are several ShapeSheet cells that can also hold SolutionXML too, as found in the Visio SDK :

The cell must be an A through D cell of the Scratch section or value cell of the User or Custom Properties section.

Custom Properties is the former name of Shape Data, and the SDK contains sample code for putting XML into the Document and a ShapeSheet cell. Unfortunately, the SolutionXML functions only work with the Document, not with a Cell.

Again, there does not seem to be a compelling reason to use SolutionXML with shape cells in my current project because it just adds extra characters, and slightly modifies the XML characters.

Visio cells can store very large amounts of text within them, and in this particular project, I have well structured XML with predictable elements and attributes. Similarly, there are many variations of books.xml on the web, ( small, medium, large ) which I have used for this article to demonstrate what can be done with XML in shapes.

In my case, I have created a Visio shape which has a Shape Data row to store the XML data, and other User-defined Cells to parse the XML data, then more Shape Data rows to just check the contents. I then have a 20 book sub-shapes that can become visible and display the information in the parent XML data automatically:

  • Small XML data set contains 2 books
  • Small XML data set contains 12 books
  • Small XML data set contains 2,652 books, but first 20 shown
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Highlighting dirty text in Visio shapes

I suppose I should explain what I mean by dirty text first 🙂

I often display the value of a Shape Data row in Visio text, but sometimes the solution requires that the value is also editable. This is ok if the client accepts that all editing is done with the Shape Data window or dialog, but not if the user more naturally wants to edit the text in the shape. In my current solution, I want to pass the manually edited text to another process for checking, and then only update the Shape Data row when validated or accepted, before re-setting the text with the inserted field. My first task was to spot with text had been manually overtyped, so I decided that checking the value of a new User-defined Cell, called IsDirty, was best, and then this value can be used to change the color of the text (or it could be the LineColor or FillForegnd) to make this value visible.

When Insert / Field is used in Visio, it creates a Text Fields section which can hold the reference to the inserted field.

If the text is manually overtyped, then the rows in the Text Fields section get deleted.

  • The Prop.Name Shape Data row inserted as a Field
  • Editing the Shape Data window dislays the value in the shape too
  • Editing the text deletes the inserted field
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Counting glued and connected shapes in Visio

I got a surprise in one of my projects when I counted the shapes glued together using the Shape.GluedShapes(…) method … the sum of the filtered glued shapes just didn’t add up to the unfiltered count. So, I thought I should check the Shape.ConnectedShapes(…) method too … and there is a scenario where that has a similar result.

In the following diagram, I have different coloured squares with connection points of different types at the centre of each edge (as denoted by the connection type numbers), and one under a control point in the bottom left corner. I have glued the ends of coloured connector lines, statically (Red and Black) and dynamically (Green), and glued the Purple Square directly to the Orange Square. The Blue Square shape is glued to a connection point on the green dynamic connector.

7 Shapes glued & connected in a variety of ways

I then ran some code to get the count of glued and connected shapes … and noticed some apparent discrepancies…

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Interactive Demographics of the European Union in Visio

I was recently contacted by a reader, Stanley M. Max (Towson University lecturer), who had started creating a Visio map of the 27 countries in the European Union in 2020, along with the demographics culled from Wikipedia. He wanted to know if the map and stats could be combined to make a more appealing presentation. Well, that prompted me to not only combine the data and country shapes, but to explore ways in which a presentation of the map can be made more interesting in Visio. So, I added data and hyperlinks to the shapes, and set up a page property for the selected country which automatically highlights the country shape, statistics, and header, to which I added flags. So, the user can either set the page country using the Shape Data window for the page, or context menu of each country, or simply by double-clicking.

  • The original Visio page
  • The original Excel table
  • The enhanced Visio page
  • A country selected for the page
  • Adding Slide Snippets
  • Exported to PowerPoint
  • Export to Word previews
  • Exported to Word
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Understanding Visio Data Graphic’s Color by Value

The desktop Visio editions, Visio Professional and Visio Plan 2, have a great way of automatically displaying data as Data Bars, Icon Sets, Text Callouts and Color by Value. The first three types of Data Graphics require sub-shapes to be inserted into each shape that they are applied to, but the last one, Color by Value (CBV), merely requires some User-defined Cells and formulas. However, unlike the first three, there can be only one Shape Data value displayed as colours in each Data Graphic (DG). So, how can we easily update the colour assigned to each value using code, rather than manually using the manual dialogs provided?

  • One Data Graphic with 4 CBVs
  • The first in the list is applied
  • Numeric data can have two types of CBV
  • Locating the Data Graphic master
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Update to LayerManager add-in for non-English users

A French user of LayerManager recently reported that the Refresh Counts button was not working for him, and a few other users were recently finding that the trial period was reporting expired immediately after download. Both of these issues have hopefully been addressed in the latest version 23.3.1, which is available for free to current users.

  • Before clicking Refresh Counts
  • After clicking Refresh Counts
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