Xotcl

xotcl@alice.wu.ac.at

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653 discussions

NX nested objects
by Victor Mayevski 22 Jan '11

22 Jan '11

Hello Gustaf, After adding attributes to an object, and creating nested objects within it, I need to list those nested objects. When I do [myobject info children], "::myobject::slot" is listed among other nested objects that I created. Since my code did not specifically create the "slot" object (it is an artifact of creating attributes), it seems that it should not be listed along with my scripted objects, perhaps [myobject info lookup children] is a better place to list the "slot" object? Thanks, Victor

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NX direct variable access
by Victor Mayevski 21 Jan '11

21 Jan '11

In NX, what is the correct way to give a direct access to an object variable for outside caller, just like we used to do with XOTcl's [myvar varname]? Thanks

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getter
by Krzysztof Frukacz 18 Jan '11

18 Jan '11

Hello, I need an example of implementation of a getter. I have an attribute in a class which now needs a customized getter. Class A -slots { Attribute attr -proc get {domain var} { #how to get attr value here? if I do [my attr] I get recursive call. $attr says that there is no such variable } } Another question: should I use -proc get or -proc valuecmd? valuecmd does seems to be not called at all. Best Regards -- Krzysztof Frukacz

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children order
by Krzysztof Frukacz 12 Jan '11

12 Jan '11

Hello, I would like to use the children mechanism for my classes. When I create a class (lets call it B) I use -contains {...} and list other objects. But in init proc of B I also use this: eval C new -childof [self]. I am interested in the order that children are listed. I need it to be fixed. I noticed that first goes the child from init of class B, then the ones that I add using -contains (outside the init proc). Is this order fixed? (first children created in superclesses, then ones from cunstructor, then ones from -contains). Also: is the order used in -contains fixed? Will I always get children in the same order that I added them? Best Regards, -- Krzysztof Frukacz

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Re: [Xotcl] possible bug?
by Krzysztof Frukacz 11 Jan '11

11 Jan '11

Hello, Thank you all for your help. I now know how to avoid the error that I was getting. The reason why I was concerned by the error was that I did not remove any class like in your examples, all I did was several source commands on the same file. It appears that some filter removes tester.tcl from my attachment, so here it is: package require XOTcl namespace import xotcl::* source extendedContainer.xotcl source c.xotcl ExtendedContainer create ec Currently I am using Ubuntu 9.04 with XOTcl 1.6.5-1.2 package. -- Krzysztof Frukacz

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possible bug?
by Krzysztof Frukacz 10 Jan '11

10 Jan '11

Hello, I attach a few files that will demonstrate the problem. Just run tester.tcl On my PC the effect is that I get an error message: ::tmp1: unable to dispatch method 'testA' while executing "tmp1 testA" The problem is that tmp1 is of class B and should be able to call testA, which is defined its superclass - A. I have found that the problem is source command, which includes file a.xotcl several times in several different files. I don't understand however why the message from interpreter says that it cannot find proc testA - this doesn't make sense. Is there a "nice" method to avoid this? Like in C we use #define and #ifndef -- Krzysztof Frukacz

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Re: [Xotcl] possible bug?
by Krzysztof Frukacz 10 Jan '11

10 Jan '11

On 01/10/2011 05:10 PM, Gustaf Neumann wrote: > Dear Krzysztof, you did not include tester.tcl. Without it is hard to > help you... -gustaf > Hello, Once again - all the files. The problem: in init of class ExtendedContainer there is a call for two procs: testA and testB. Both should work, because tmp1 is an object of class B (which contains testB) which has superclass A (which contains testA). However the call for testB works, but testA doesn't. Why? Thank you for you help. Best regards -- Krzysztof Frukacz

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IDE and objects
by Krzysztof Frukacz 10 Jan '11

10 Jan '11

Hello, Two questions about xotcl. First one: what IDE would you recommend? Currently I am using Eclipse with XOTCL plugins. I like this IDE, but as it comes for TCl and XOTCL the plugins do not work very well. I found XOTclIDE, but it looks a little bit exotic...maybe there are some other plugins for Eclipse? I am using standard ones from Galileo repository. Second question: lets assume that I want to check if particular variable contains a TCL object of given class: $var istype MyClass. It works good, assuming that $var contains an object, but if there is a value like "15" we get an error. Is there a nice way to check if a variable contains an object of given class and at the same time just get a false answer in case it does not contains a XOTCL object? -- Krzysztof Frukacz

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assign proc - how to execute assign from superclass?
by Krzysztof Frukacz 05 Jan '11

05 Jan '11

Hello, I have a question for which I haven't been able to find the answer. I have two classes: Class create A -slots { Attribute foo -proc assign {domain var value} { if {$var > 5} { error "Value cannot be bigger than 5" } $domain set $var $value } } Class create B -superclass A -slots { Attribute foo -proc assign {domain var value} { if {$var < 0} { error "Value cannot be less than 0" } #I don't know how to call assign for foo in class A here } } What I want to to is for assign proc from B to call assign proc from A too check both conditions. Thank you for your help. -- Krzysztof Frukacz

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nx parameters
by Victor Mayevski 20 Dec '10

20 Dec '10

Hello Gustaf, 1. Is there any way to add meta-data to parameters during parameter creation? Specifically I would like to add a time stamp to the the parameter so I can list parameters in the order they were created. 2. Is there a reason why the "object setter" command has to be a two step command, example: [Object create o; o setter s; o s value]. Why can't it be done in one step [o setter s value] ? I guess the same goes for the "object attribute" command. 3. What is difference between "setter" and "attribute"? Thanks

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