[IronPython] Viewlets: Any F# experts here?
Michael Foord
fuzzyman at voidspace.org.uk
Fri Jun 27 15:45:56 CEST 2008
Curt Hagenlocher wrote:
> A bit of quality time with Reflector shows that there's a
> _viewletsProxy object which hasn't been initialized. You probably
> need to call VSLabFSICore.Viewlets.Init() first. It's static, and in
> the vslabfsicore module.
Thanks Curt - your reflector-fu is greater than mine. I should spend
some quality time with it.
Your advice gets me to the next step, I can make a GraphControl flash
momentarily into view (on creation), but attempting to show it causes
another explosion:
C:\compile\VSLab>C:\compile\IronPython-2.0B3\ipy.exe -X:ExceptionDetail
viewlet.
py
Operation unavailable (Exception from HRESULT: 0x800401E3
(MK_E_UNAVAILABLE))
at System.Runtime.InteropServices.Marshal.GetActiveObject(Guid&
rclsid, IntPt
r reserved, Object& ppunk)
at System.Runtime.InteropServices.Marshal.GetActiveObject(String progID)
at VSLabFSICore.Viewlet.Show()
at GraphViewlet.GraphControl.Show()
at _stub_$28##26(Closure , CallSite , CodeContext , Object )
at _stub_MatchCaller(Object , CallSite , Object[] )
at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
at
Microsoft.Scripting.Actions.UpdateDelegates.Update2[T,T0,T1,TRet](CallSite
site, T0 arg0, T1 arg1)
at S$2.Initialize(CodeContext )
at IronPython.Hosting.PythonCommandLine.RunFileWorker(String fileName)
at IronPython.Hosting.PythonCommandLine.RunFile(String fileName)
EnvironmentError: Operation unavailable (Exception from HRESULT:
0x800401E3 (MK_
E_UNAVAILABLE))
The code that produces this is:
import clr
clr.AddReference('vslabfsicore')
clr.AddReference('vslabviewlets')
from VSLabFSICore import Viewlets
from GraphViewlet import GraphControl
Viewlets.Init()
g = GraphControl()
g.Show()
If instead of 'g.Show()' I attempt 'dir(g)' I get a very odd error!
C:\compile\VSLab>C:\compile\IronPython-2.0B3\ipy.exe -X:ExceptionDetail
viewlet.
py
'this' type cannot be an interface itself.
at System.RuntimeTypeHandle.GetFirstSlotForInterface(IntPtr
interfaceHandle)
at System.RuntimeType.GetInterfaceMap(Type ifaceType)
at
Microsoft.Scripting.Generation.CompilerHelpers.TryGetCallableMethod(Method
Info method)
at
Microsoft.Scripting.Generation.CompilerHelpers.FilterNonVisibleMembers(Typ
e type, MemberInfo[] foundMembers)
at IronPython.Runtime.Types.TypeInfo.MemberBinder.GetMember(Type
type, String
name, BindingFlags flags)
at
IronPython.Runtime.Types.TypeInfo.StandardResolver.ResolveMember(MemberBin
der binder, DynamicAction action, Type type, String name)
at
IronPython.Runtime.Types.TypeInfo.MemberResolver.ResolveMembers(MemberBind
er binder, DynamicAction action, Type type)
at IronPython.Runtime.Types.TypeInfo.GetResolvedMembers(MemberBinder
memberBi
nder, DynamicAction action, Type type)
at
IronPython.Runtime.Calls.PythonBinder.ResolveMemberNames(CodeContext conte
xt, PythonType type, PythonType owner, Dictionary`2 memberNames)
at IronPython.Runtime.Types.PythonType.GetMemberNames(CodeContext
context, Ob
ject self)
at IronPython.Runtime.Operations.PythonOps.GetAttrNames(CodeContext
context,
Object o)
at IronPython.Runtime.Builtin.dir(CodeContext context, Object o)
at _stub_$26##24(Closure , CallSite , CodeContext , Object , Object )
at _stub_MatchCaller(Object , CallSite , Object[] )
at Microsoft.Scripting.Actions.CallSite`1.UpdateAndExecute(Object[] args)
at
Microsoft.Scripting.Actions.UpdateDelegates.Update3[T,T0,T1,T2,TRet](CallS
ite site, T0 arg0, T1 arg1, T2 arg2)
at S$2.Initialize(CodeContext )
at IronPython.Hosting.PythonCommandLine.RunFileWorker(String fileName)
at IronPython.Hosting.PythonCommandLine.RunFile(String fileName)
ValueError: 'this' type cannot be an interface itself.
Incidentally, even when installed with VS Pro I can't get VSLab to work
*anyway* (this is Vista 64bit FWIW), so the code may not be ready for
prime time.
I may try firing up reflector myself and see where it takes me.
Michael Foord
>
> On Thu, Jun 26, 2008 at 2:58 PM, Michael Foord
> <fuzzyman at voidspace.org.uk <mailto:fuzzyman at voidspace.org.uk>> wrote:
>
> The viewlets that come with VSLab look *really* cool. They're
> based on F# so I decided to see if they could be used from IronPython.
>
> http://www.codeplex.com/vslab
>
> The dependencies are pretty hefty. You need F# installed *and*
> Managed DirectX (June 2008 SDK ~450mb seems to fulfil the dependency).
>
> To get at the viewlet assemblies you need Visual Studio Pro
> installed as well, but they can be extracted from the VSLabs msi
> installer without VS Pro.
>
> Ok, so with all the dependencies installed I attempt to use them -
> and *boom*. Anyone here got any ideas?
>
> IronPython 2.0 Beta (2.0.0.3000) on .NET 2.0.50727.1434
> Copyright (c) Microsoft Corporation. All rights reserved.
> >>> import clr
> >>> clr.AddReference('vslabfsicore')
> >>> clr.AddReference('vslabviewlets')
> >>> clr.AddReference('vslabcore')
> >>> from GraphViewlet import GraphControl
> >>> g = GraphControl()
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "vslabviewlets", line unknown, in .ctor
> File "vslabfsicore", line unknown, in .ctor
> File "System.Windows.Forms", line unknown, in get_Controls
> File "System.Windows.Forms", line unknown, in get_Properties
> SystemError: Object reference not set to an instance of an object.
>
>
> Interesting that the explosion is inside winforms. Referencing
> that assembly first makes knows difference.
>
> Michael Foord
>
>
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