Regular readers of my blog will know that I like to use the Data Visualizer (DV) in Visio Plan 2, but I recently tried to help a user who really decided to push it to the limits. In this scenario, there were multiple connections, but with different labels, being created between the same flowchart shapes, and the plea was how to make it work! Well, I experimented with this, and found that DV does not really work well in this way, and then proposed an alternative approach, which I will explain in this article.
First, I will show how it fails by setting up an Excel table that does contains multiple connections, but fails to update the labels consistently.
Lesson 1: Export from Excel to Visio is not the same as Import to Visio from Excel
The following screenshot was created by clicking Table Design / External Table Data / Export / Export Table to Visio Diagram… in Excel for the above table, and then choosing the Cross-Functional Flowchart (horizontal) option.
I then chose Hierarchy / Top to Bottom the Design / Layout / Re-Layout Page gallery, and created a simple Shape Report to see the text on each Dynamic connector shape. It was then clear that I had to manually change some of the connectors to use static rather than dynamic glue so that I could see them all.
The following screenshot, however, was created by creating a new Cross-Functional Flowchart – Data Visualizer in Visio, then choosing the above Excel table.
As before, I then chose Hierarchy / Top to Bottom the Design / Layout / Re-Layout Page gallery and created a simple Shape Report to see the text on each Dynamic connector shape. Again, it was then clear that I had to manually change some of the connectors to use static rather than dynamic glue so that I could see them all. Unfortunately, Visio sometimes gets confused about which connector should have which label, and can get it wrong, as shown below, where the same label has been duplicated.
These errors can occur in the export from Excel too. I have also seen instances where the connector label becomes uneditable in Visio.
Therefore, my conclusion is that DV cannot handle multiple connectors between the same shapes.
Also, the template used by the export to Visio from Excel is different to the one used by import from Excel in Visio.
Lesson 2: Making Connectors Invisible is not the Same as Making Lines 100% Transparent
I added extra connection points to the Process shape so that all the connectors could be spaced out, and I edited the labels back to what they should have been, so finally I could display the connections clearly in the following screenshot.
However, this diagram needs to be used to display the alternative routes between Process shapes, and the user wanted to make some connectors invisible so that the desired connectors are shown clearly. My first thought was to move some connectors to a different layer, and then make the new layer invisible.
Unfortunately, DV automatically deleted all the connectors that were assigned to a layer that was made invisible!
So, the alternative is to assign this new layer to a colour, and make the colour 100% transparent!
So, my conclusion is to never assign any DV controlled shapes to a transparent layer!
Lesson 3: Even choosing Color By Value using Data Graphic Fields causes a re-layout
There are times when I want to manually adjust the layout because DV does not do it quite right … However, if I then choose to use Data Design / Refresh Diagram or simply select a field in the Data Graphic Fields panel, then DV will automatically re-layout the diagram, even if all I wanted was to have Color by Value. This is because the Data Graphic Field row selection will try to guess what Graphic Item you may want, and this will change all the data-linked shapes to groups, if they are not already, and insert a Graphic Item sub-shape causing the bounding rectangle to be extended, and consequently forcing the layout to be re-spaced. Then, if you change it to the Color by Value that was really wanted, it is too late, the unrequired sub-shape is removed, and the re-layout is automatically performed again!
My next post will focus on a solution to overcome these issues with Data Visualizer... This will mean creating a modified Visio template to import from Excel!
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