Copyright © 1999-2026 Actipro Software LLC. All Rights Reserved. Sat, 02 May 2026 10:48:42 Z 60 754471a3-1835-4cce-9fa7-75627757ffe9-123532 Okay thank you for checking! 2026-05-02T10:48:42Z 754471a3-1835-4cce-9fa7-75627757ffe9-123529 Hi Timothy, I see it as well that Rider is not showing the enum values there and is showing a general resource list instead. I tested Visual Studio desktop and VS works correctly to show the enum... 2026-05-02T04:06:44Z 754471a3-1835-4cce-9fa7-75627757ffe9-123528 For some reason the ThemeResource enumeration keys no longer show in auto complete menu in Rider. This used to work but in newer versions of Rider is seems to have broken. I'm not sure if there is ... 2026-05-01T14:20:30Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123523 Hi Matt, We don't have the v26.1 docs published on our web site yet since it's prerelease but you can see the latest in our public GitHub repo. This topic talks about how to enable our brush ove... 2026-04-22T12:55:44Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123521 Hi, Trying Avalonia 12 with the updated TreeDataGrid now but having some trouble with applying Actipro theme. Is this included now? We did have a custom override but would prefer to use standard ... 2026-04-22T10:03:00Z 16ccb24f-32ed-4804-918c-8d09845782bc-123499 thanks for info!tomasz 2026-04-08T16:24:45Z 16ccb24f-32ed-4804-918c-8d09845782bc-123498 This particular exception is happening because Avalonia v12 added new members to the IScrollable interface and that means any controls that implement that interface based on Avalonia v11 no longer ... 2026-04-08T16:11:30Z 16ccb24f-32ed-4804-918c-8d09845782bc-123497 After upgrade to avalonia 12, my application crashes with following exception: System.TypeLoadExceptionHResult=0x80131522Message=Could not load type 'Avalonia.Controls.Primitives.IScrollable' fro... 2026-04-08T08:13:45Z 16ccb24f-32ed-4804-918c-8d09845782bc-123496 I would like to try the out the preview build if possible. 2026-04-07T21:40:59Z 16ccb24f-32ed-4804-918c-8d09845782bc-123483 Thank you so much for the answer!If time permits, I'll gladly help testing our preview build. 2026-03-24T08:18:55Z 16ccb24f-32ed-4804-918c-8d09845782bc-123482 Hello, Yes, absolutely! We have in fact been working with the Avalonia team during their preview build phase and now RC phase to resolve some issues that have been encountered, and have been giv... 2026-03-23T16:24:04Z 16ccb24f-32ed-4804-918c-8d09845782bc-123481 Good morning, Sorry to bother you like this, but I was wondering if there is a plan to support the new release of Avalonia (currently in RC) in the coming weeks/months? I wanted to test the RC... 2026-03-23T09:27:10Z fb162279-78b7-4dd9-ac13-fe8f55ec9f86-123465 thx 2026-03-06T00:56:21Z fb162279-78b7-4dd9-ac13-fe8f55ec9f86-123463 Hello, We don't currently have a theme resource for that font style, but we will add a new resource for it in our next build. After that update, you'll be able to put this in your Application.R... 2026-03-05T20:55:06Z fb162279-78b7-4dd9-ac13-fe8f55ec9f86-123462 Hi how to override font style of editor's watermark: itlic -> normal 2026-03-05T09:16:24Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123457 Good news, our v26.1 release will have a feature that can update the theme resource brushes used by the Avalonia Accelerate TreeDataGrid, Markdown, and Keyboard controls to use Actipro brushes. Th... 2026-03-03T17:29:00Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123449 Just a plus one from me in case you are still considering this! I am using Avalonia Accelerate and making heavy use of the TreeDataGrid now, with everything else in the app already themed by Actipro. 2026-03-02T16:21:05Z a5c93f7a-e2f1-42b0-af2f-8ea8c1b295ca-123431 Ok I see it works but its rather subtle. At least for Blue, it works better with other colors like DeepSkyBlue 2026-02-07T02:41:53Z a5c93f7a-e2f1-42b0-af2f-8ea8c1b295ca-123430 Hi Dirk, It should be working with all colors. If you look at our Dynamic Image Quickstart sample, you can see various comparisons of light vs. dark themes with assorted colors of images. If y... 2026-02-06T20:33:08Z a5c93f7a-e2f1-42b0-af2f-8ea8c1b295ca-123429 I tried the new DynamicImage and it works great with black/white colors when the theme changes, but it doesn't work with colors such as regular blue, which is clearly visible in white mode but very... 2026-02-06T14:17:32Z b500d1a9-9812-40a7-821c-6e5640cfd5c1-123411 Hello, Thank you! 2026-01-20T03:34:24Z b500d1a9-9812-40a7-821c-6e5640cfd5c1-123410 Hello, Thank you for reporting this. We've noticed that in Rider as well and found it frustrating that Rider wasn't properly identifying style classes we define in our dynamic themes. We did so... 2026-01-19T21:55:29Z b500d1a9-9812-40a7-821c-6e5640cfd5c1-123407 Hi, I have a question regarding style classes, such as "theme-solid". I can use them in my application perfectly fine. However, while using Rider, I see warnings on the axaml that they are not fo... 2026-01-17T04:49:24Z 399cb792-f13b-4989-8e97-bc5c1d1468f5-123349 If a user types and then selects an item from the list either via return key or via mouse click, there is no event I can listen to. Well for the return key its probably easy via key press event but... 2025-11-30T04:45:22Z f03d0639-e7b4-4db8-af76-b2f92ba3e941-123338 Thank you very much! 2025-11-20T10:18:45Z f03d0639-e7b4-4db8-af76-b2f92ba3e941-123335 Hi Ben, Thank you for the clarification. Yes, dark themes may use the accent color tint because otherwise a default black shadow would barely show up. Adding a little color from the theme ensures... 2025-11-19T21:03:30Z f03d0639-e7b4-4db8-af76-b2f92ba3e941-123334 Hi There, Apologies yes, the above XAML was poor! Here is an edited version of the Avalonia default application, that shows the issue: <Window xmlns="https://github.com/avaloniaui" x... 2025-11-19T14:41:15Z f03d0639-e7b4-4db8-af76-b2f92ba3e941-123327 Hi Ben, I pasted the code above in our sample project and added some content in the flyout but didn't see what you were referring to. Can you give a full XAML sample that shows it that we can pu... 2025-11-18T21:22:13Z f03d0639-e7b4-4db8-af76-b2f92ba3e941-123326 I am having an issue where my accent colour is green, but this means that the shadow colour for flyouts coming from accented controls is green, and it doesn't look great. If I have some xaml like... 2025-11-18T15:01:13Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123299 Yes that is the one 2025-11-10T23:07:58Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123298 Hi Keegan, Thank you for the feedback. I assume you are considering the Avalonia Accelerate version of the TreeDataGrid right now if you go with Avalonia? We have a suggestion logged to look in... 2025-11-10T21:39:31Z 57e1c29c-9b08-455a-b415-5c55027e28d0-123297 Just adding my +1, this is the reason I came to the forum, to find out whether the TreeDataGrid is part of the styled built in components. It's an essential control for us. We are still deciding ... 2025-11-10T17:45:23Z cf194a4f-a872-4d93-9f47-dfc864146c67-123283 Hi Jacob, Check out our Themes' "Containers" QuickStart in our samples project. It shows all of the various container-related brushes that can be used from our themes for a consistent look. Her... 2025-11-03T21:29:48Z cf194a4f-a872-4d93-9f47-dfc864146c67-123282 I was making control wrappers around avalonia and actipro themes due to me disliking lookless controls How would I apply the current actipro theme to my stackpanel control in a way that it re... 2025-11-02T20:56:45Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123280 Glad you got it working. I've added a note about your interest in previewing the RangeSlider, and we can reach out closer to availability. 2025-10-29T16:22:40Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123279 Thasnk again! I have it working (after a fashion) but am also very much looking forward to your own implementation of a range slider (a very useful control) and yes, would be very keen to see early... 2025-10-29T12:46:03Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123277 The SliderThumb theme gets you the basics of the control template, but there are some additional properties set by our Slider native theme to complete the look. I tried pasting the following into ... 2025-10-28T18:21:50Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123272 Thanks for the prompt response as always! I have tried to apply your ControlTheme approach but without success - I am almost certainly doing it wrong. Would it be possible for a slightly more com... 2025-10-27T22:49:44Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123269 Two different questions here, so I'll start with Matt's. Matt, you might be happy to know that we've actually be working on a RangeSlider control as part of our Fundamentals product that will be ... 2025-10-27T21:00:48Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123270 Hi, I have exactly the same question, but for a simple Button. I would like to override the Button to create a custom button, and I am using modern theme. If I use the basic snippet from the ... 2025-10-27T20:39:47Z f5404ce2-bed5-40dd-8ebe-b8fb11f41511-123268 Hi, I am still quite new to Avalonia in general so my understanding in this area is a little limited - go easy on me please :) I am currently using modern theme throughout my application which ... 2025-10-27T11:04:36Z 2f5238ae-8ac8-4142-9e43-31071993b90b-123003 Hello, Thank you for the suggestion, we'll make a note of the request. 2025-06-09T16:49:46Z 2f5238ae-8ac8-4142-9e43-31071993b90b-123002 Sure, I can do it that way, but having the option to add buttons to a ComboBox would be nice. DevExpress for WPF has something like that, and such a component looks better and also speeds up a deve... 2025-06-07T08:52:26Z 2f5238ae-8ac8-4142-9e43-31071993b90b-123001 Hello, We don't have anything built-in for adding buttons inline within a ComboBox. But you could put a simple plus icon button right next to the ComboBox to support adding items. That's a comm... 2025-06-06T19:35:52Z 2f5238ae-8ac8-4142-9e43-31071993b90b-122998 I’m looking for a ComboBox control that allows adding extra buttons inside the control itself – for example, a button to add a new item to the list. Do you have a component that supp... 2025-06-06T16:10:14Z 57e1c29c-9b08-455a-b415-5c55027e28d0-122972 Hello, After checking with the Avalonia team, it sounds like that TreeDataGrid control is still in a tentative state and will possibly be moving to their Accelerate offering in the future. We wi... 2025-05-27T17:15:18Z 57e1c29c-9b08-455a-b415-5c55027e28d0-122968 any plans for this? TreeDataGrid seems to be stable ... 2025-05-26T10:46:32Z 3ca4d0ac-3e72-4783-9aee-b9f765ae343d-122907 The problem was that I didn't have the Width property set. In this configuration, Slided worked outside of SettingsCard but in SettingsCard it only displayed a "dot"Thanks for your help. 2025-05-03T11:47:49Z 3ca4d0ac-3e72-4783-9aee-b9f765ae343d-122904 Hi, I'm sorry to hear you are having trouble using the slider in a SettingsCard. Our Sample Browser includes some examples that include a slider and I'm not seeing any issues there. If you run... 2025-04-30T21:35:11Z 3ca4d0ac-3e72-4783-9aee-b9f765ae343d-122903 the slider placed inside the actipro:SettingsCard is not functioning properly. Only the middle part of the slider is visible, and it's not possible to change its value. 2025-04-30T19:11:01Z a1631c15-3a83-497b-a6f7-b2210d5abd28-122869 Regarding 3: you're right. My popup was too large and covered the editable text, it was enough to limit its size. Thanks for the information, great support! 2025-04-02T10:24:14Z a1631c15-3a83-497b-a6f7-b2210d5abd28-122868 Hello, Keep in mind that BarComboBox doesn't inherit the native ComboBox and is intended to show gallery or menu items in its popup. Thus its implementation is a little different from how a Comb... 2025-04-01T19:10:42Z a1631c15-3a83-497b-a6f7-b2210d5abd28-122864 I need a ComboBox with item search capability. So I used actipro:BarComboBox (in a standard window, without ribbon). The code looks like this: <actipro:BarComboBoxDisplayMemberBinding="{Bind... 2025-03-31T13:53:16Z 5897da9f-df77-411e-b2c0-9cbc4c18fd3a-122848 Thank you for the information. Your controls are excellent, so I will soon become your customer. :) 2025-03-06T15:51:23Z 5897da9f-df77-411e-b2c0-9cbc4c18fd3a-122843 Hello, 1) Our default control themes and templates are available for download by Actipro Avalonia Pro customers. If you've licensed Actipro Avalonia Pro, you can download and clone our control t... 2025-03-04T21:55:17Z 5897da9f-df77-411e-b2c0-9cbc4c18fd3a-122842 1. I see that BarComboBox has a TemplatePart PART_DropDownButton, but I'm not sure how to view its contents and potentially modify it.2. The idea of an additional item in the popup menu is interest... 2025-03-04T20:29:54Z 5897da9f-df77-411e-b2c0-9cbc4c18fd3a-122840 Hello, While we don't have anything in the templates that would support injecting an embedded button, you could update a control template to add another button. Or as you said, putting a button ... 2025-03-04T19:57:27Z 5897da9f-df77-411e-b2c0-9cbc4c18fd3a-122839 Is it possible to add an additional button to the ComboBox/BarComboBox? For example, I want the ability to select items from the ComboBox and create a new item by clicking a button. Of course, ... 2025-03-04T11:07:33Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122827 Thanks! 2025-02-19T00:04:35Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122826 To the left of each theme resource is a preview of it. Brushes will have a color swatch. Thickness and CornerRadius values will render a shape using the related value. If you hover the pointer o... 2025-02-18T22:43:57Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122825 I am unable to see the actual values in the theme browser. Am I missing the button to expose that information? I do not need to lookup the values in runtime. 2025-02-18T17:23:14Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122824 The easiest way to browse all the available theme resources is to use the Theme Resource Browser utility in our Sample Browser application: https://www.actiprosoftware.com/docs/controls/avalonia/... 2025-02-14T22:14:15Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122823 OK thanks. How can I find the actual values for the brushes? 2025-02-14T16:50:07Z 3679896e-404e-4e46-bf54-ec796e9df621-122822 Ok, thank you for the clarifications. 2025-02-14T15:01:53Z 3679896e-404e-4e46-bf54-ec796e9df621-122817 The logic to take the flags enum MessageBoxButtons and break that out into individual values is internal to UserPromptControl and not part of the UserPromptButtonItemsControl. There's little value... 2025-02-12T22:44:51Z 3679896e-404e-4e46-bf54-ec796e9df621-122816 Of course, I can replicate the button layout similar to that in UserPromptControl myself. However, I was wondering if it might be possible to use the UserPromptButtonItemsControl component and pass... 2025-02-12T09:58:41Z 3679896e-404e-4e46-bf54-ec796e9df621-122815 The buttons themselves use our default Outline theme. You can find more details about our native control themes here: https://www.actiprosoftware.com/docs/controls/avalonia/themes/native-control... 2025-02-11T22:59:13Z 3679896e-404e-4e46-bf54-ec796e9df621-122814 I would like to place buttons in my window that look like the OK/Cancel buttons displayed using UserPromptBuilder.WithStandardButtons. How can I achieve this? 2025-02-11T20:24:06Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122811 Hello, If you have specific brushes you'd like to use, you can override our resources in Application.Resources like this: <Application.Resources> <ResourceDictionary> <Resour... 2025-02-11T15:44:54Z 8c634687-49ea-45e6-a28d-58cee7f5c0a8-122810 The default font is too light and washes out IMHO. The DefaultForegroundBrushMax is prefect. How can I override the default brush to use the max brush without adding the style class to every cont... 2025-02-10T19:00:41Z ab64299c-9de4-4a52-8f6d-4b5c2e6c1b27-122735 Hi JP, Now that Avalonia 11.1 (and newer) is available, all you should have to do is make sure you're using a version of our controls that is compatible with the version of Avalonia you are using... 2024-12-04T21:56:54Z ab64299c-9de4-4a52-8f6d-4b5c2e6c1b27-122734 I see. Do you know of another way to achieve this? Thanks. 2024-12-04T19:03:16Z 9d34e0b1-324c-4641-af56-e7ad14105ec6-122733 Thank you for the fix. I'll be waiting for the new package update, and I also will try to create a new definition object and set it to current moderntheme. 2024-12-03T09:18:10Z 9d34e0b1-324c-4641-af56-e7ad14105ec6-122729 Hello, Thank you for reporting this. It appears that the ModernTheme.RefreshResources method wasn't properly updating native and Actipro control themes for various ThemeDefinition apperance kind... 2024-12-02T16:57:31Z 9d34e0b1-324c-4641-af56-e7ad14105ec6-122728 I tried the answer, it worked partially. UserInterfaceDensity and RequestedThemeVariant values are responding change in runtime and updates window and other controls but, ButtonAppearanceKind and... 2024-11-29T06:33:39Z 9d34e0b1-324c-4641-af56-e7ad14105ec6-122723 Hi, You can manage all of this in code-behind by looking up the theme definition and modifying the properties just as you did in XAML. The following help topic has a C# sample near the bottom fo... 2024-11-27T20:19:49Z 9d34e0b1-324c-4641-af56-e7ad14105ec6-122722 Hello, I'm using actipro themes package with avalonia UI, and I want to customize user interface , by settings of some actipro theme generation parameters in App.axaml. This is theme definition... 2024-11-27T11:32:33Z d18042f1-a062-4966-9fe2-f67056e521b6-122704 Thank you for your reply. I understand that the title bar cannot be hidden. 2024-11-11T22:10:26Z d18042f1-a062-4966-9fe2-f67056e521b6-122703 Hello, Thank you fo evaluating our Avalonia controls. While our ChromedTitleBar doesn't have a way to hide itself on MacOS like it does for Windows, perhaps that is something we could look into ... 2024-11-11T21:20:29Z d18042f1-a062-4966-9fe2-f67056e521b6-122698 Thank you for providing a great library. I am now checking to see if your library works on Windows and MacOS.I am checking to see if SampleBrowser.Desktop works.It is really great. I have one q... 2024-11-10T02:25:32Z 7b56e89a-0dd6-451e-a4b8-3163f0c241bd-122688 Hi MJ, Our latest release (v25.1) is now available that is compatible with Avalonia 11.2. Please let us know if you have any other issues. 2024-11-06T22:06:44Z 7b56e89a-0dd6-451e-a4b8-3163f0c241bd-122679 Hi MJ, The Avalonia 11.2 release adds "seconds" to the TimePicker control, so that means any control theme that doesn't define the "seconds" part will fail. Our current release is not yet compat... 2024-11-04T13:47:34Z 7b56e89a-0dd6-451e-a4b8-3163f0c241bd-122678 After updating to Avalonia version 11.2.0 app crashes if TimePicker is present. App only crashes when using Actipro theme, Fluent theme doesn't crash. 2024-11-04T12:12:50Z 8ff4a55b-762f-44db-9da0-6de0a0f5a22e-122672 Hello, If you wanted to increase the scrollbar thumb barrel width ("ascent"), you can do this in your Application.Styles, which increases the thumb barrel width from 4 to 8: <actipro:ModernTh... 2024-10-28T20:24:21Z 8ff4a55b-762f-44db-9da0-6de0a0f5a22e-122671 Most of my users have a very hard time finding the skinner scrollbars. I have updated my WPF actipro app to use a modified version default scrollbar. The only difference is the color. I would li... 2024-10-28T17:14:14Z 912435af-ebbb-4ffa-8f9a-fefa61bb73f2-122665 OK that's working now. Thanks. 2024-10-25T22:14:18Z 912435af-ebbb-4ffa-8f9a-fefa61bb73f2-122664 These resources can vary based on the current theme (light or dark), so you'll want to be sure you're passing the appropriate theme when resolving the resource. In our Sample Browser, we load thos... 2024-10-25T22:05:54Z 912435af-ebbb-4ffa-8f9a-fefa61bb73f2-122663 I am trying to create a SolidColorBrush for a custom Control that uses the ThemeResourceKind.ControlForegroundBrushOutlineAccent.ToResourceKey() C# resource key, however I am unable to load the res... 2024-10-25T19:53:04Z 048f3173-4920-492e-b03c-6857143cdd2f-122646 Got it! That's just what I was looking for. Thanks! 2024-10-22T19:39:50Z 048f3173-4920-492e-b03c-6857143cdd2f-122642 Yes, you can do that as long as the "kind" you indicate after actipro:ControlTheme is a valid member of our ControlThemeKind enumeration. For instance we don't have a "Button" value there, but hav... 2024-10-22T19:09:30Z 048f3173-4920-492e-b03c-6857143cdd2f-122641 I see, I wasn't aware of the "actipro:ControlTheme" markup extension. Can I do something like: <Button Theme="{actipro:ControlTheme Button}" /> even though the default theme for the Butto... 2024-10-21T18:29:37Z 140ae21e-aeb2-46b3-9644-bfa12a6031e8-122638 Thanks, I did not notice that one! Nice that you're one step ahead :) 2024-10-21T18:12:03Z 048f3173-4920-492e-b03c-6857143cdd2f-122631 Hi Magnus, Flyouts themselves are not controls. But the presenters used for them are. If you wanted to include a ControlTheme for a specific control, like a MenuFlyoutPresenter, you could add ... 2024-10-18T18:30:47Z 140ae21e-aeb2-46b3-9644-bfa12a6031e8-122629 Hi Magnus, Thank you for the feedback. We do have documentation regarding ordering of themes in App.xaml. Did you see the topic linked below? https://www.actiprosoftware.com/docs/controls/ava... 2024-10-18T18:21:58Z 048f3173-4920-492e-b03c-6857143cdd2f-122630 Consider an app where the ModernTheme is included but is overridden by another theme. How would you apply the theme for a flyout from what has been included in ModernTheme? I have not found a sampl... 2024-10-18T13:20:31Z 140ae21e-aeb2-46b3-9644-bfa12a6031e8-122626 It might be a good idea to add a section in the documentation explaining the ordering of styles in App.axaml. For example, if you already have an app with a theme and you only want to use some A... 2024-10-18T08:10:03Z ccf27806-dc7c-4268-831f-eaa219d08084-122624 Hi, Initially I wasn't able to reproduce the issue using Avalonia's Fluent theme, that's why I reported the issue here. After a bit of playing around I was able to reproduce it also using that th... 2024-10-18T07:59:22Z ccf27806-dc7c-4268-831f-eaa219d08084-122623 Hi MJ, We aren't the authors of the Avalonia DataGrid control. We just have an optional theme for it. Thanks to your excellent reproduction steps, I did double check to verify that the issue ca... 2024-10-17T18:55:18Z ccf27806-dc7c-4268-831f-eaa219d08084-122622 When displaying a large number of lines (e.g., 10 000) in a DataGrid it's not possible to scroll to the last line using the scroll wheel, scrolling stops at the penultimate line and the last line i... 2024-10-17T08:54:38Z 1213fd83-5c65-4c91-800c-b5052e357e32-122618 Hello, That's odd. We loaded up our sample project on an Ubuntu installation via the Windows System for Linux. When we run our sample app there, the app's content area renders the exact same as... 2024-10-14T18:25:29Z