QTk Widgets

Khadija EL MAHRSI khadija.elmahrsi at gmail.com
Fri May 4 18:59:12 CEST 2012


The called procedure compares Var to some string ('Application' for
example) and even if Var really does contain 'Application', the result is
always "false".

2012/5/4 Sébastien Doeraene <sjrdoeraene at gmail.com>

> It's up to the called procedure to use it in a way that is string-like.
>
> It's like in C with the 'char' type: it's used both for small integers and
> for characters. The interpretation is a consequence of the operations
> applied.
>
> Sébastien
>
>
> On Fri, May 4, 2012 at 6:27 PM, Khadija EL MAHRSI <
> khadija.elmahrsi at gmail.com> wrote:
>
>> What if I wanted to use the content of Var as an argument?
>>
>>
>> 2012/5/4 Sébastien Doeraene <sjrdoeraene at gmail.com>
>>
>>> Use {System.showInfo Var} instead.
>>> Sébastien
>>>
>>>
>>> On Fri, May 4, 2012 at 6:21 PM, Khadija EL MAHRSI <
>>> khadija.elmahrsi at gmail.com> wrote:
>>>
>>>> Hello,
>>>> Yes, I've figured that much and I remember running into this problem
>>>> before but I can't remember if I was able to display the string in letters
>>>> not the ASCII codes or not. Because when I use {System.show Var}, I get the
>>>> list of ASCII codes while the result I need is for the string in letters to
>>>> be displayed.
>>>>
>>>> Thanks.
>>>>
>>>>
>>>> 2012/5/4 Sébastien Doeraene <sjrdoeraene at gmail.com>
>>>>
>>>>> Hi,
>>>>>
>>>>> In Oz, a String *is* a list of numbers (the ASCII codes of the
>>>>> characters in the string). It's only the way you use it that determines if
>>>>> it is considered as a string or as a list of numbers.
>>>>>
>>>>> Cheers,
>>>>> Sébastien
>>>>>
>>>>>
>>>>> On Fri, May 4, 2012 at 5:23 PM, Khadija EL MAHRSI <
>>>>> khadija.elmahrsi at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>> I'm having another problem with the Dropdownlist. The value returned
>>>>>> by the command:
>>>>>>
>>>>>> {List.nth {D get($)} {D get(firstselection:$)}}
>>>>>>
>>>>>> is a list of numbers (which I suppose represents the selected virtual
>>>>>> string from the list).
>>>>>> When combined with {L set(...)} the value displayed is really the
>>>>>> string but when I try:
>>>>>>
>>>>>> Var := {List.nth {D get($)} {D get(firstselection:$)}}
>>>>>>
>>>>>> I get the list of numbers instead of the string itself in Var. Any
>>>>>> help?
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>>
>>>>>> 2012/5/4 Torsten Anders <torsten.anders at plymouth.ac.uk>
>>>>>>
>>>>>>> Dear Khadija,
>>>>>>>
>>>>>>> Great you solved it. Indeed, the graphics in this documentation are
>>>>>>> very distorted.
>>>>>>>
>>>>>>> Best wishes,
>>>>>>> Torsten
>>>>>>>
>>>>>>>
>>>>>>> On 3 May 2012, at 22:41, Khadija EL MAHRSI wrote:
>>>>>>>
>>>>>>> > Hi,
>>>>>>> > Thank you for trying to help. I managed to solve the problem which
>>>>>>> was caused by a silly mistake actually. When I was about to put the part of
>>>>>>> the code which caused the problem, I noticed that I somehow missed the
>>>>>>> handle part in the dropdownlistbox when I copied the code into my
>>>>>>> application (maybe due to the weird way the web page was displayed) which
>>>>>>> is why it didn't work. My mistake.
>>>>>>> >
>>>>>>> >
>>>>>>> > 2012/5/3 Torsten Anders <torsten.anders at plymouth.ac.uk>
>>>>>>> > Dear Khadija,
>>>>>>> >
>>>>>>> > I have not used QTk for years, so I don't remember any of theses
>>>>>>> things I must say.
>>>>>>> >
>>>>>>> > Anyway, I wrote some application once that uses the Listbox
>>>>>>> widget, and that is still working fine under Mozart 1.4.0 (just checked).
>>>>>>> Also, if I remember correctly the Prototyper application uses this widget
>>>>>>> -- so you could check its source out as an example.
>>>>>>> >
>>>>>>> >
>>>>>>> http://www.mozart-oz.org/documentation/mozart-stdlib/wp/qtk/html/node2.html#chapter.prototyper
>>>>>>> >
>>>>>>> > So, for any more specific help I am afraid you need to send us
>>>>>>> some code demonstrating your problem :)
>>>>>>> >
>>>>>>> > Best wishes,
>>>>>>> > Torsten
>>>>>>> >
>>>>>>> > --
>>>>>>> > Dr Torsten Anders
>>>>>>> > Course Leader, Music Technology
>>>>>>> > University of Bedfordshire
>>>>>>> > Park Square, Room A315
>>>>>>> > http://www.torsten-anders.de
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > On 3 May 2012, at 15:07, Khadija EL MAHRSI wrote:
>>>>>>> >
>>>>>>> > > Hello,
>>>>>>> > > I was experimenting with QTk and wanted to use the
>>>>>>> Dropdownlistbox. First of all, the documentation page is weirdly displayed
>>>>>>> compared to the other widgets and secondly (and more importantly), it's not
>>>>>>> working. The part where the label is supposed to display the selected value
>>>>>>> from the list is not working. I've tried making the label display any given
>>>>>>> string instead and it worked.
>>>>>>> > > I've also tried the Listbox widget and noticed that the items
>>>>>>> disappear when selected. Is this normal?
>>>>>>> > > Isn't there a way to have something close to the traditional
>>>>>>> List box or Drop-down list box?
>>>>>>> > >
>>>>>>> > > Thanks.
>>>>>>> > >
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>>>>>>> >
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