The New WPF Theme Generation System

by Avatar Bill Henning (Actipro) - 6 comments
Thursday, July 16, 2020 at 6:01pm

Actipro WPF Controls v2020.1 development is in progress, and the new version’s main goals are to modernize our UI control features/themes, and make theme customization much easier.

In our previous post, we talked about how we will be bringing .NET Core builds of our WPF Controls in v2020.1, along with publishing NuGet packages.

In today’s post, we’ll start to dive into one of the largest areas of the themes-related updates for this version, which is the new theme generation system.

Generated Themes

The Actipro WPF controls provide numerous complete pre-defined themes that render similar to various Windows and Office versions.  These themes apply to Actipro and optionally native WPF controls as well so that there is consistency throughout your application’s appearance.  While this system has always worked well, the current pre-defined themes are somewhat difficult to customize. 

We wanted to take themes to the next level for the new version, and we have truly built something fantastic.

What we came up with is a framework where you can configure numerous options on a theme definition object.  When you register that theme definition with our ThemeManager, you then can apply that theme at any time with a single line of code.  Multiple theme definitions can be registered, allowing you to register “light” and “dark” themes (or any other variant you like) and instantly toggle between them at run-time.

An example of native controls themed in an Office White theme with Orange accents

When a theme definition is applied, instead of simply merging pre-defined resource assets (brushes, thicknesses, etc.) into the Application.Resources as before, we dynamically construct hundreds of resource assets very quickly and merge them into Application.Resources.  The resource assets that are created are based on the options in the theme definition, and are generated in a fraction of a second.

Like now, we still provide themes that render similar to Windows and Office.  We register theme definitions for those, among others, by default with the ThemeManager so they can be applied at any time with a single line of code.

Customizing Themes

Say that you love our Office Colorful Indigo theme (Word-like appearance), but you don’t like how it has grayscale background state hover/pressed effects for toolbar and menu items.  In the past, this would be difficult to change... but not any more.  You can get the default theme definition we provide for this theme, adjust an option on it to use accent colors for toolbar/menu state backgrounds, and when the new theme definition is applied, you’ll see the adjusted appearance in action.

What happens behind the scenes is that our theme generation logic adheres to the options you specify, and the brush resource assets that it creates for toolbar/menu state backgrounds are generated with accent color values instead of grayscale color values.

Theme Definition Options

How many options are there for theme definitions?  At the time of this writing, we have well over 50 options so far and are adding more as we work towards wrapping up the first beta build of v2020.1.

You can control all kinds of things with theme definitions options, including color palette, border contrast, bullet appearance, font size, corner radius, window appearance, and much more.

Beta Testers Wanted

We are approaching a point where we’re like to start collecting a list of beta testers for the 2020.1 version, who can start working with the new features soon.  If you would like to assist us in testing, please write us at our support address.  We would like individuals who are already licensed for the 2019.1 version, are willing to use beta versions of 2020.1 (.NET Core or .NET Framework), and who want to provide feedback, especially in the area of our themes updates.


We’re just scratching the surface here of what you can do with the new theme definitions.  We haven’t even shown off the new Theme Designer app yet.  We’ll continue to dive into the area of theme generation in upcoming blog posts.  Stay tuned!

Post in the comments below with any questions or comments on theme generation.

WPF Control NuGet Packages Including .NET Core Builds

by Avatar Bill Henning (Actipro) - 2 comments
Tuesday, June 30, 2020 at 7:11pm

Actipro WPF Controls v2020.1 development is in progress, and the new version’s main goals are to modernize our UI control features/themes, and make theme customization much easier.

In our previous post, we took a look at a new mechanism in our primary WPF Controls samples app to quickly search for samples.

Today's post will focus on some infrastructure updates we've been working on to bring not only NuGet feeds, but also .NET Core builds of our WPF controls in v2020.1.

NuGet Package

Many customers have asked for NuGet package feeds of our WPF Control assemblies so they can reference the feeds in their applications and not have to manually update assembly references when moving to new versions.  By using NuGet feeds, the versions can be easily managed through Visual Studio's NuGet Package Manager.

We are still finishing it all up, but here's a preview of an Actipro WPF Controls metapackage (a NuGet package that includes other individual Actipro product packages) as seen in the NuGet Package Explorer app.

The NuGet package for all the WPF controls in WPF Studio

Our eventual plan is to publish the 20+ Actipro WPF Control packages to so that it's simple to find and use them.

Before we get there and while doing final testing on this mechanism, we may start with a ZIP of our NuGet packages that you can download from your Actipro account and place in a private NuGet server to get started.

.NET Core Builds

As .NET Core gains momentum and popularity, we will be there with native .NET Core builds of our WPF Control products, starting in v2020.1.

While the traditional WPF Controls installer you download from our site will still only include .NET Framework versions of the assemblies (for now), as mentioned above, we will make a ZIP available with our NuGet packages.  These NuGet packages will target the traditional .NET Framework and also .NET Core 3.0.

Thus you'll be able to reference these NuGet packages in your .NET Core app projects to use pure .NET Core-based Actipro assemblies.


Both of these updates have been highly requested by our customers.  We recognize that adding them is delaying the release of v2020.1 a bit, but we want to make sure we get all of this right.

As far as timelines go, we still have some work left on finalizing the implementation of the above.  Part of this is moving to a new VS designer object model for the .NET Core variations of the WPF control designer functionality.  Once that effort is complete and we've completed some additional adjusting of our themes system based on alpha testing, we will ask for beta testers to participate in a closed beta.

v2020.1 is shaping up to be an enormous release.  The blog hasn't even really gotten into the new theme generation features yet, or the new Theme Designer application.  Watch for blog posts on those soon.

Post in the comments below with any questions or comments on the NuGet feeds and .NET Core builds.

WPF Samples Application Search Mechanism

by Avatar Bill Henning (Actipro) - 1 comment
Wednesday, May 27, 2020 at 5:01pm

Actipro WPF Controls v2020.1 development is in progress, and the new version’s main goals are to modernize our UI control features/themes, and make theme customization much easier.

In our previous post, we showed how our WPF samples application will be getting an integrated Source Code Viewer for browsing our samples source code. This feature was suggested by a customer.

Another customer feature suggestion was for a way to quickly search for samples. We are also adding this in the 2020.1 samples application.

Searching for Samples

We’ve used the AutoCompleteBox in our WPF Editors to implement search functionality for locating samples.

The new "Search samples" box

Simply type in text in the search box and a list of results will appear.

The popup showing samples with "bru" in their titles

Select a result and the related sample will appear.

After selecting a sample, it immediately loads up


We appreciate all the customer feedback and hope this new v2020.1 feature will help you find what you are looking for faster than ever.

Post in the comments below if you have any feedback or questions about the new samples search mechanism.

WPF Samples Application Source Code Viewer

by Avatar Bill Henning (Actipro) - 1 comment
Tuesday, May 26, 2020 at 5:12pm

Actipro WPF Controls v2020.1 development is in progress, and the new version’s main goals are to modernize our UI control features/themes, and make theme customization much easier.

In the previous post, we took a look at our redesigned WPF samples application that will launch in the 2020.1 version. The new design focuses on a modern aesthetic that makes great use of our themes-related updates for v2020.1.

One of the user comments in that post was that it would be great to support viewing of the sample’s code right from within the application. This is something we also planned on adding, so let’s see what that feature looks like.

Viewing Sample Code

When you navigate to a sample, a “View Source Code for This Sample” menu item is available. We also have added a status bar button with a “</>” glyph that accesses the same feature.

The menu item to view sample source code

When clicked, the Source Code Viewer window will open and the selected sample’s main XAML code will be displayed by default.

The XAML source for the sample

The Source Code Viewer window opens as a separate window so that if you have a multi-monitor setup, you can display the code on a different monitor from the samples application itself.

The Source Code Viewer window has the full sample source folder hierarchy on the left. Select a different file from the same sample or a different sample altogether to see additional source code.

The C# source code for a class in the sample

Here we’ve selected a view-model C# class for the same sample.


This Source Code Viewer is a great example of combining multiple Actipro WPF products (Docking/MDI, Shell, and SyntaxEditor) together in a simple way to implement a professional-looking code explorer. We think this new feature in the v2020.1 samples application will be a real time-saver for our customers when wanting to learn more about how to use our WPF Control products.

Post in the comments below if you have any feedback or questions about the new Sample Code Viewer.

WPF Samples Application Modernization

by Avatar Bill Henning (Actipro) - 5 comments
Friday, May 22, 2020 at 1:15pm

Actipro WPF Controls v2020.1 development is in progress, and the new version’s main goals are to modernize our UI control features/themes, and make theme customization much easier.

In the previous post, we took a look at the many updates made to modernize the appearance of our Ribbon product for v2020.1.  Over the past several weeks, we've been hard at work completely redesigning the user interface of our WPF Controls samples application.  This has been quite an effort since the application contains hundreds of samples in it.  Let's dig in!

Reimagining the Samples Application Design

The new WPF Controls samples application design makes use of all our latest themes-related improvements in the 2020.1 version.  Right from the start, you'll see our new WindowChrome title bar customization features in play.  We've created a completely unique appearance for the title bar in this application, with the current location clearly listed on the left, and various other buttons (switching the app theme, quickly getting to the release history or other views, and so on) on the right side.

The sample application's home view

The home view features direct links to our most popular control demos at the very top.  Or scroll down to click buttons that delve into each product, with many samples available for each.

The buttons here make use of our new ShadowChrome control that is added in v2020.1.  ShadowChrome renders modern drop shadows and can be easily animated.  In this case, we draw the button "upward" to the mouse by altering the shadow as you mouse over a button.

Another thing to notice here is that we've built vivid new icons for each of our WPF Control products, all in the fluent design style.

Let's click the "Editors" product button...

The Editors product overview

Each product overview provides one or more screenshot buttons that link directly to enticing samples of the product, and shows a brief description of the product.  Scroll down to see the entire categorized list of links to available product samples.

We'll click on the "Brush" edit box link...

The Brush edit box QuickStart

This screenshot is representative of what you'll find with many of our QuickStart samples.  The control itself is displayed on the upper left.  Various sample options to alter its appearance and behavior appear in the right sidebar, and a general description of the control is below that.  We often show a gallery of example usage scenarios of controls as well.

How does all this look if we change the application theme?  Let's switch to a Metro dark theme:

The Brush edit box QuickStart in dark theme

Flipping back to the original theme, how can we quickly jump to another Editors sample or to another product's samples?

The Backstage for the Editors area

By clicking the button on the upper left that shows the current view location, a Backstage view is displayed.  It lists all the samples for the current product in a categorized list.  Or you can scroll down to see the list of products to easily jump to another product's samples.  This Backstage feature is supported by our new WindowChrome overlay feature.


We've put a lot of effort into making a new clean, modern design for the samples application and we hope that you'll love using it once the 2020.1 version is released.  It makes the entire presentation of the hundreds of samples in the application much more consistent and best of all, the XAML code-behind is now much easier to read.

Post in the comments below if you have any feedback or questions about the new samples application design.