Excel to Graphviz

# Change Log

# Version 7.2.01

# Version 7.2.0

sql Worksheet

  • Added support for recursive SQL queries, enabling the creation of hierarchies such as organization charts and connected data paths.

    • A candidate dataset should include a pair of related columns that enable hierarchical traversal. For example:

      • The columns employee id and manager id in a business organization contain the relationship between an employee, and the manager they report to.
      • The columns station and next station in a subway map contain the point-to-point destinations of subway stations on a given subway line.

    • New SQL conventions provide the ability to:

      • Anchor the Base Case - where you define the starting point (such as the top-level parent in a hierarchy).
      • Define the Recursive Member - where you specify how to recursively connect results to construct subsequent levels.

    • Explore the updated sample workbooks for practical examples:

      • 12 - Using SQL - Trees - Shows how to traverse any node-to-node structure by starting at a node and iterating through either its connected predecessor nodes, or connected successor nodes.
      • 13 - Using SQL - Organization Charts - Shows how to build a complete organization chart, or extract a branch of an organization chart.

settings Worksheet

  • Four new values have been added to the settings worksheet under the sql tab, as additional keywords for recursive SQL queries. These values provide flexibility, allowing the keywords to be customized for use in non-English languages.

style designer Worksheet

  • Resolved a screen flicker issue on the style designer worksheet that occurred during the initial creation of color images for ribbon dropdown lists.

ExecuteAndCapture Module

  • Conducted RubberduckVBA code inspections across the entire codebase. Implemented improvements to the ExecuteAndCapture module based on its recommendations.

# Version 7.1.0

Fixed a bug that caused Excel to freeze when Graphviz wrote more than 4096 bytes of message output:

  • The Relationship Visualizer spreadsheet uses the ExecuteAndCapture routine to run Graphviz's dot command and capture any dot output messages.
  • ExecuteAndCapture reads messages via an interprocess pipe with a fixed size of 4096 bytes.
  • dot paused after writing 4096 bytes of messages, waiting for ExecuteAndCapture to read and clear the data from the pipe before resuming.
  • ExecuteAndCapture was paused, waiting for dot to finish before reading any data from the pipe.

This resulted in a deadlock. To eliminate the deadlock:

  • ExecuteAndCapture now monitors the execution of dot in real-time, instead of waiting for it to complete.
  • ExecuteAndCapture periodically checks the pipe for data. Any data found is read and removed from the pipe.
  • dot is now able to pause and resume as needed until graph generation is complete and all messages are captured.

# Version 7.0.0

# Worksheet Changes

console Worksheet

  • Added a new console worksheet which displays the Graphviz dot command's error & diagnostic messages.
  • Added a new, associated Console ribbon tab which offers various logging options.

diagnostics Worksheet

  • Added a new diagnostics worksheet which documents the environment in which the tool is being used.
  • Added a new, associated Diagnostics ribbon tab containing buttons which will clear the Style Designer image caches for fonts and colors when pressed.

info Worksheet

  • Renamed the about... worksheet as info.
  • Hid the info worksheet by default. The info worksheet containing all the credits and license information is now toggled via a button on the Launchpad ribbon tab.
  • Added a new, associated Info ribbon tab with buttons for Excel to Graphviz-related web links (such as Github, SourceForge, Buy me a Coffee, etc.).

source Worksheet

  • Added a new modeless pop-up window which displays the dot source used to create the graph image. This pop-up works in addition to the source display on the source worksheet making it easier to show the image and dot source simultaneously when conducting training.
  • All Graphviz dot source code rendered in Excel is displayed in the source worksheet, and also in the new pop-up window. Previously only the source used to render the data worksheet was displayed. Now the source generated by the style designer is also viewable.

sql Worksheet

  • SQL statements can grow in height beyond Excel's capabilities to display as a worksheet row, especially if multiple SQL statements are UNIONed into one large SQL statement. A new pop-up form was added which allows editing the contents of a cell containing a SQL statement. This form allows you to see the entire contents of the cell, scroll through it, and edit it.
  • Added Copy to Clipboard button which will copy SQL statements to the clipboard.
  • Added the pseudo-sql statement SET DATA FILE which can be used to specify the file name of the workbook to be queried. This statement makes it easy to query different files when using the filter capability as you don't need to change the file name for every SQL statement.
  • Added support to specify CLUSTER LABEL and SUBCLUSTER LABEL in SQL commands so that you can have cluster headings which are different than the value you are grouping by, or to null out the heading and just have a border.
  • Added a utility routine RunSQLAsExtension which lets you run the SQL code from the Extension tab, so you can keep the SQL worksheet hidden.

settings Worksheet

  • Added new CLUSTER LABEL and SUBCLUSTER LABEL identifier strings to the SQL settings.
  • Added a new settings cell to store the name of the view currently being graphed. This enhancement allows you to write formulas that include the view name in the graph output, especially when using the 'All Views to File' graphing capabilities.
  • Removed the timeout setting. See Miscellaneous changes below for reason.

style designer Worksheet

  • Locked the Labels group of controls in one consistent location. They no longer shift left or right depending on Node, Edge, or Cluster radio button. Labels controls are now consistently on the right of the Color Scheme group. Dynamic controls such as Shape now begin to the right of Labels.
  • Moved the Colors button to the Launchpad ribbon tab.
  • Added a static label to show the name of the currently selected color scheme.
  • Added a new group of controls for defining packmode attributes. The controls make it easy to specify the maximum number of components (subclusters or nodes) per row/column, row-major vs. column-major layout, shape alignments, and activation of user-defined sorting.
  • Made UI changes to conserve ribbon space for lower resolution monitors
    • Moved the gradient fill color dropdown beneath the primary fill color dropdown. Gradient Fill options group now appears only after a second fill color is selected.
    • Image Scale and Position controls are only displayed if an image file name has been specified.
    • New packmode controls are only visible when the layout on the Graphviz tab is set to osage, and the design mode on the style designer tab is set to cluster.
  • Made adjustments to the font preview image, as portions of the image were getting cut off by Graphviz version 11 and above.
    • You will need to clear the Excel to Graphviz font image cache to see the change if upgrading from a prior version of this spreadsheet.
    • Refer to Diagnostics above to learn how to clear image caches.
  • Improved the performance of displaying/resetting the Style Designer ribbon tab. The time required on the author's PC to load 700+ images in the dropdown lists and display the tab was reduced from ~13 seconds on v6.1.01 of this spreadsheet to ~4 seconds on this new version. (Note: First time use still requires the 700+ images to be created and placed into a cache, and is not included in this timing). Performance improvements include:
    • Cached the Gray* preview images under the names Gray* and Grey* for the X11 color scheme, resulting in 100 less images being loaded into memory. The 15% reduction from 656 to 556 cached images provides performance and memory use improvements.
    • Eliminated numerous Windows 11 font names as choices, as they are not recognized by the Graphviz pango font mapper.
    • Made refinements on when to handle events.
  • Made improvements to the dot source code which generates the preview images.
    • Cluster previews now show 7 nodes so the effects of packmode attibutes are visible.
    • Edge previews now provide language translations of "HEAD" and "TAIL" labels
  • Added emoji and symbol fonts to the list of fonts.

styles Worksheet

  • Added a new ribbon tab for the styles worksheet.
  • Added the ability to generate preview images of the style definitions in either singular or bulk fashion.

svg Worksheet

  • Added a new pop-up form which allows editing the contents of a cell containing a large replacement string. Replacement strings can grow beyond Excel's capabilities to display as a row. This form allows you to see the entire contents of the cell, and edit it. It also makes splitting post-processing directives across multiple rows unnecessary.
  • Provided enhanced JavaScript for smoother SVG animation.
  • Provided alternate styling for SVG animation more akin to macOS controls. This version is commented-out by default. You can choose which to use by commenting-out one or the other.
  • Added Copy to Clipboard, Graph to File and All views to File buttons on SVG tab. Copy to Clipboard is not available on macOS as the clipboard code is Windows OS-specific.

# Ribbon Tab Changes

Launchpad Ribbon Tab

  • Consolidated all the buttons for showing/hiding worksheets onto a new Launchpad ribbon tab.
  • Provided buttons to show/hide previously hidden worksheets such as the language translations.

Exchange tab

  • Updated to include the CLUSTER LABEL, SUBCLUSTER LABEL settings from settings worksheet in exports and imports.
  • Updated to include Launchpad worksheet show\hide settings.

Graphviz tab

  • Moved the Show/Hide Worksheets and Language controls to the Launchpad ribbon tab, as they are not Graphviz-related.
  • Converted Style and Debug dropdown menu items to check boxes on the main ribbon in the new space freed up by moving the Show/Hide Worksheets and Language controls to the Launchpad tab.
  • Added Include Image Path as a Graph check option so the image path can be omitted from dot source when images are not being used.
  • Eased restrictions on when automatic drawing can occur so that ribbon tab changes can be observed in either the data or graph worksheet.

# Miscellaneous Changes

  • Windows OS: Replaced the Open Source ShellAndWait() function used to run the Graphviz dot command with a new Open Source function ExecuteAndCapture() which can run the Graphviz dot command and return the messages which dot writes to the standard output, and standard error message pipes. These messages are then displayed on the new console worksheet. A tradeoff of this code replacement is that the timeout capabilities which ShellAndWait() provided are not present in ExecuteAndCapture.

  • Windows OS: Replaced the code used to copy dot source code to clipboard with a new implementation which does not rely on an Internet Explorer ActiveX object.

  • Eliminated adding quotes to most strings. This change reduces the number of string concatenations, which improves performance slightly. More important, it makes the Graphviz source easier to read, and use in other Graphviz editors which sometimes do not like the quoted strings.

  • Created a Graphviz class for rendering graphs. It accepts the dot code as a string, and handles the writing to a file, executing dot, and returning any messages.

    • Refactored all places in the code base previously writing files and using the ShellAndWait() function to convert the code to instantiate Graphviz objects and render graphs using this new approach (which greatly simplified the internal coding).
    • You can now view any dot source code processed by the class on the source worksheet, such as the dot source generated by the style designer when creating preview images.

  • Eliminated many of the named lists from the lists worksheet which were only used to determine the position of which dropdown item to select when the workbook was opened. The ribbon now directly generates and returns the dropdown id from the saved value, as opposed to searching the list and returning a relative integer position. This change simplifies future maintenance, and elimination of list searching will improve performance slightly.

  • When a worksheet is activated, the ribbon switches to the tab which is most appropriate for the worksheet. This behavior was modified to introduce a one second delay and run in an asynchrous fashion as on macOS the ribbon controls need to complete any refresh before the tab can be switched. The asynchrous delay allows for pending events to process.

  • Simplified the test which determines if a label is HTML-like, which makes it easier to specify labels which use simple HTML to do things like bold or itacize a portion of the label. For example <This text should be <b>bold</b>> will now work, where previously it would have required the whole label to be wrapped in HTML such as <<p>This text should be <b>bold</b></p>> .

  • Revised an internal SplitMultilineText function to split lines by line breaks (such as \n) into an array, then apply the split logic to each line in the array, and concatenate the results. Previously the line breaks were included as part of the text string and were counted when determining where to make splits. It also lets you retain line breaks for things like splitting the label into multiple lines separated by a blank line.

  • Accepted RubberDuckVBA suggestions to improve code quality.

# Version 6.1.01

Style Designer enhanced to include Mrecord in the list of shapes.

# Version 6.1.00

Style Designer enhanced to show a progress indicator when loading large dropdown lists.

# Version 6.0.03

Style Designer ribbon tab was enhanced to not load names and images of colors and fonts for hidden dropdown lists. This change significantly reduced the time to load the tab from ~15 seconds to ~8 seconds.

# Version 6.0.02

Swapped the original SVG postprocessing find/replace scripting with a new contribution which adds animated edge highlighting, and cluster zoom in/zoom out capability.

# Version 6.0.01

Style Designer ribbon was enhanced to cache references to color and font images as they get loaded from the file system.

For Graphviz's default X11 color scheme, this change eliminates over 4,000 file system accesses, reduces the amount of memory used by the ribbon (6 copies of color images, and 1 copy of font images eliminated), and reduces the initial load time of the tab by a couple of seconds.

The tab still takes about 15 seconds to load, but 15 is better than 17. Other color schemes load faster as well.

# Version 6.0.00

New Online Help

  • Excel to Graphviz (opens new window) now has its own website at https://exceltographviz.com/

  • Ribbon tabs have been updated with Help buttons which take you to the online help for that tab.

Enhanced SQL Capabilities

  • SQL queries can now specify spreadsheet columns to group as clusters, or group as subclusters within a cluster.

    For example, a query such as

    SELECT [City] As [Item], [State] As [Cluster], [County] As [Subcluster] from [Geography$] WHERE [Population] > 100000

    would draw a cluster for each State. Within the State, clusters will be drawn for each County, and each County cluster will have nodes for each City found with a population greater than 100000. This type of query compliments the osage layout engine.

  • Pseudo-sql statements have been added which allow you to run several SQL statements in a row, then output a graph. Statements take the form below, where words in uppercase are the new commands, and words in lowercase are graph prefixes:

    • RESET
    • PREVIEW
    • PREVIEW AS DIRECTED GRAPH
    • PREVIEW AS UNDIRECTED GRAPH
    • PUBLISH
    • PUBLISH example01
    • PUBLISH AS DIRECTED GRAPH example01-directed-graph
    • PUBLISH AS UNDIRECTED GRAPH example01-undirected-graph
    • PUBLISH ALL VIEWS
    • PUBLISH ALL VIEWS example01-allviews
    • PUBLISH ALL VIEWS AS DIRECTED GRAPH example01-all-views-directed
    • PUBLISH ALL VIEWS AS UNDIRECTED GRAPH example01-all-views-undirected

  • Filtering. The SQL worksheet lets you add values to columns to the right of the SQL which can be filtered on to control which statements get executed. In this way you can define sets of queries and generate a batch of diagrams, or filter to a specific set to generate a single diagram.

  • Label splitting. SQL queries can now split values used as labels at an approximate length which can be specified in the query. Logic finds the closest blank between words to use as the split location. You can also specify the line delimiter to center, left, or right align the text.

  • Samples. A new Enterprise Architecture sample has been contributed which lets you fill in a reference spreadsheet, and it generates a set of EA diagrams which span the relationships in the various worksheets in the workbook. See SQL examples in the samples directory for running examples of all the new capabilities.

SVG Post-processing Capability

  • Added a new worksheet and ribbon tab for post-processing graphs which are output as SVG files. The post-processing works by performing find/replace actions against the file using values on the svg worksheet.

    The default implementation provided will insert JavaScript code which highlights nodes and edges with thick magenta lines if you click on them. Another use case scenario (not provided) would be to modify image references to provide a base URL.

    The svg ribbon tab contains an on/off switch to control if post-processing should be performed. The feature is turned off by default to ensure pure Graphviz SVG files are created OOTB.

Default Graph to File Directory

  • Removed restrictions on the Graph to File button which disabled the button if an output directory was not specified. Now the current directory where the workbook resides will be used as the place to write the file if no other directory is specified.

Style Designer Feedback During Loading

  • Graphviz's default color scheme is X11 which has 656 colors. The Style Designer ribbon tab has 7 color dropdown lists. This results in 4,592 file accesses to fill the dropdown lists with preview images, which takes about 17 seconds on a fairly recent computer. The spreadsheet appears to be frozen during this period. A change was made to disable events during the loading of a list, but turn them on between lists to provide feedback in the status bar as to which list is being loaded. This small amount of feedback changes every 2 seconds or so and lets you know that the spreadsheet is working, and is not hung.

Sample Workbook Updates

  • The workbooks and JSON files in the "samples" directory were updated to version 6.0.00.

# Version 5.8.00

Solid-fill Gradients for Nodes and Clusters

  • A new Weight percentage for the primary fill color has been added to the Style Designer which allows for the creation of solid-fill gradients.
  • The Weight dropdown list dynamically appears under the Fill Color dropdown once a value for Gradient Fill Color has been selected.

Tooltip Support

  • A new Tooltip column has been added to the 'data' worksheet which will add the tooltip attribute to clusters, nodes, and edges if the image format is SVG.
  • The Tooltip column is hidden by default, and can be unhidden by selecting the "Tooltip" entry of the Columns list on the Graphviz tab.
  • Office 365 displays SVG files in the Excel as a picture, older versions of Excel do not support SVG. To see the tooltip information, you must save the graph to a SVG file and view it in a browser such as Microsoft Edge which has support for SVG files.
  • Export/Import of the Tooltip data column has been added to the Exchange mechanism.
  • The fontname in the predefined styles on the 'styles' worksheet were changed from "Calibri" to "Arial" to be more SVG and Mac friendly.

Sample Workbooks

  • The workbooks and JSON files in the "samples" directory were updated to version 5.8.00.

File Size

  • Redundant images created by the Office RibbonX Editor tool have been removed, which reduced the Excel workbook size by over 1MB.

# Version 5.7.01

Polish language translation originally created using the http://www.deepl.com free translation service have been reviewed and edited by Polish-speaking contributor Arek Czak.

Style Designer color dropdown lists now show the default color Graphviz will use when no color has been chosen as the first value in the list.

# Version 5.7.00

Added Polish language translation. The translation was created using the http://www.deepl.com free translation service (and may have errors).

# Version 5.6.00

Fixed a small bug where the "outputorder" attribute was being emitted as "orderoutput".

Added overlap, mode, smoothing, dim, dimen attributes to the Algorithm group on the Graphviz tab. The show/hide display of these options are controlled by the layout algoritm selected. The ribbon will dynamically change to show only attributes which apply to that layout.

Continued to purge performance slowing string operations, helping to improve performance on older machines.

# Version 5.5.01

Made several code performance optimizations to the getItemColor and getItemLabel callbacks in the Style Designer ribbon menu which greatly reduce the time it takes to LOAD the lists of color choices names and preview images.

Made changes which reduce the time it takes to CREATE the color preview images which are displayed in the color choice dropdown lists.

# Version 5.5.00

# Multiple Language Support

Introduced a "Language" dropdown to the Graphviz tab providing a capability to toggle different languages.

Initial languages supported:

  • English (US)
  • English (UK)
  • French
  • German
  • Italian

Items translated (using language translation software, and may have errors) include:

  • The ribbon interface tab names, ribbon groups, ribbon control labels, buttons, super tip help text.
  • Worksheet names
  • Column headings
  • Error and status messages

Items not translated include:

  • The HELP - Attributes worksheet
  • Style and View names on the styles worksheet
  • Portions of the settings worksheet pertaining to worksheet column layouts
  • The user documentation
  • The sample worksheets

Hidden worksheets contain the language translations. You can edit these worksheets to make corrections. Simply unhide the appropriate worksheet which starts with locale_, correct the text, save, and close the workbook, and reopen the workbook.

# Metric Measurement Support

Added metric units for height and width to the Style Designer.

A checkbox lets you toggle the lists between inch units (which Graphviz uses) and millimeters (which the Style Designer will convert to inches)

# Font Preview Images

Added font preview images to the Style Designer Font drop-down lists.

You may notice a delay the first time the Style Designer ribbon is displayed while preview images are created using the list of fonts on your PC. This is a one-time installation activity, and these images remain cached for future use.

In addition, Windows 11/Office 365 has introduced thousands of fonts and font variations (e.g., bold, italic). Code has been added to prune the font list to just the fonts which Graphviz can use.