- 30/07/2020 at 04:20 #18535
Hi! I’ve taken the Tobii.InteractionLib.Wpf.SampleApp and copied all the code and references in a fresh project, to experiment with it myself. I’ve copied the “lib” directory into my project too. I’ve added tobii_interaction_lib_wpf.dll and tobii_interaction_lib_cs.dll as references. But when I try to run my project, it builds successfully but doesn’t run. Windows Event Log reports a DllNotFoundException:
Description: The process was terminated due to an unhandled exception. Exception Info: System.DllNotFoundException at Tobii.InteractionLib.InteractionLibCImports.IL_CreateInteractionLib(IntPtr ByRef, Tobii.InteractionLib.FieldOfUse) at Tobii.InteractionLib.Wpf.InteractionLibWpfHost..ctor()
Am I missing something? How do I use the Interaction Library correctly? It doesn’t want to work outside the sample apps…30/07/2020 at 04:22 #18537
btw, the documentation mentions there is Tobii.InteractionLib in NuGet also, but it’s not there. Is it obsolete or what?30/07/2020 at 11:11 #18545
Hi @sapp, sorry to hear about your issues. Can you kindly confirm for us what happens if you follow our WPF Guide @ https://tobiitech.github.io/interaction-library-docs/wpf/html/index.html
You should only need to unzip the Interaction Library ZIP and use the Visual Studio Developer Prompt command to get the program running:
msbuild samples/wpf/Tobii.InteractionLib.Wpf.SampleApp/Tobii.InteractionLib.Wpf.SampleApp.csproj /p:Configuration=Release /p:Platform=x64 /verbosity:minimal
Which produces the relevant exe. I had to first install the Microsoft .NET Framework 4.7.1 Developer Pack available @ https://www.microsoft.com/en-us/download/confirmation.aspx?id=56119
Please let us know the output from this command. Best Wishes.31/07/2020 at 12:31 #18553
@grant-rogers, I’m fine running the sample app itself. Now I’m trying to use the library for my own project. That’s where I have a problem, because apparently just using the DLLs is not exactly enough. Can you describe how Interaction Library is intended to be used outside the sample app?31/07/2020 at 14:35 #18554
Hi @sapp, could you kindly clarify what kind of language bindings and technologies (C++,C#,WPF, etc) you intend on using? Thereafter I will be better placed to offer a ‘blank’ template.
That being said, in the meantime you could simply strip the sample application down to the bare components and build your project upon that, but I will look at providing details otherwise.01/08/2020 at 04:11 #18557
@grant-rogers, oh right, I’m using C# WPF. Just created a new .NET Framework project. Copied the “lib” directory with the DLLs to the project. Added tobii_interaction_lib_cs.dll and tobii_interaction_lib_wpf.dll to References. Thought it would suffice, but apparently missing something.
Thank you for your advice, I’ll try to strip down the sample app too. Just want a clear understanding, what is needed for correct usage.02/08/2020 at 09:43 #18560
Ok @grant-rogers, I’ve found the missing parts. They were all hidden in the project file: Tobii.InteractionLib.Wpf.SampleApp.csproj
I’m not sure if the missing fields can be set up via Visual Studio’s GUI, I couldn’t find them there. I’ve edited my .csproj file directly to add the missing stuff. I believe the crucials were these:
<PropertyGroup> <IsWindows>false</IsWindows> <IsOSX>false</IsOSX> <IsLinux>false</IsLinux> <IsWindows Condition="'$(OS)' == 'Windows_NT'">true</IsWindows> </PropertyGroup> <PropertyGroup Condition="'$(MSBuildRuntimeType)' == 'Core'"> <IsWindows Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Windows)))' == 'true'">true</IsWindows> <IsOSX Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))' == 'true'">true</IsOSX> <IsLinux Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' == 'true'">true</IsLinux> </PropertyGroup> <PropertyGroup> <LibPath>../../../lib/$(Platform)</LibPath> <LibPath Condition="'$(BuildLibPath)' != ''">$(BuildLibPath)</LibPath> </PropertyGroup>
<ItemGroup Condition="$(IsWindows)"> <NativeDlls Include="$(LibPath)/tobii_interaction_lib_c.dll" /> <NativeDlls Include="$(LibPath)/tobii_interaction_lib.dll" /> <NativeDlls Include="$(LibPath)/tobii_stream_engine.dll" /> </ItemGroup> <ItemGroup Condition="$(IsOSX)"> <NativeDlls Include="$(LibPath)/libtobii_interaction_lib_c.dylib" /> <NativeDlls Include="$(LibPath)/libtobii_interaction_lib.dylib" /> <NativeDlls Include="$(LibPath)/libtobii_stream_engine.dylib" /> </ItemGroup> <ItemGroup Condition="$(IsLinux)"> <NativeDlls Include="$(LibPath)/libtobii_interaction_lib_c.so" /> <NativeDlls Include="$(LibPath)/libtobii_interaction_lib.so" /> <NativeDlls Include="$(LibPath)/libtobii_stream_engine.so" /> </ItemGroup> <Target Name="AfterBuild"> <Copy SourceFiles="@(NativeDlls)" DestinationFolder="$(OutputPath)" SkipUnchangedFiles="true" /> </Target>
So now with these things in my .csproj file I can successfully build and run the app. All good. Thank you for participation!03/08/2020 at 10:01 #18567
Great! Thanks for sharing Roman and glad to hear you got your project up and running 🙂
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