Hi Antonio,
Thank you very much for updating my example. I was using action as
the callback because in the example in the subcanvas page in the IUP
website it uses action:
int function(Ihandle **ih*); [in C]
*elem*:action() -> (*ret*: number) [in Lua]
Thanks,
Milind
On Thu, Jul 27, 2017 at 12:54 PM, Antonio Scuri <[email protected]>
wrote:
> Hi,
>
> IupGLSubCanvas does not have an ACTION callback. It is called
> "GL_ACTION".
>
> But you can not simply replace the canvas callback by the subcanvas
> callback, they operate in different levels. You must leave the clear in the
> general callback, and do only the line drawing in the subcanvas callback.
>
> Once you place the subcanvas outside a dynamic layout, you will have to
> manually resize it. Or you can set expandhorizontal and expandvertical
> attributes to do that for you.
>
> See the attached example.
>
> Best,
> Scuri
>
>
> 2017-07-26 14:09 GMT-03:00 Antonio Scuri <[email protected]>:
>
>> I haven't looked at it yet. I'm on vacation. Be back tomorrow.
>>
>> Best,
>> Scuri
>>
>> Em 26/07/2017 11:02, "Milind Gupta" <[email protected]> escreveu:
>>
>>> Hi Antonio,
>>> Any suggestions why defining the action call back is causing an
>>> error?
>>>
>>> Milind
>>>
>>> On Tue, Jul 25, 2017 at 8:42 AM, Milind Gupta <[email protected]>
>>> wrote:
>>>
>>>> Hi Antonio,
>>>> Please see the attached example. When I run this I get this
>>>> error:
>>>>
>>>> lua: [string "iuplua.lua"]:139: bad argument #3 to 'SetCallback'
>>>> (Invalid functi
>>>> on when set callback.)
>>>> stack traceback:
>>>> [C]: in function 'iuplua.SetCallback'
>>>> [string "iuplua.lua"]:139: in metamethod '__newindex'
>>>> glcanvasbox2.lua:13: in main chunk
>>>> [C]: in ?
>>>>
>>>>
>>>> Please can you help me fix it.
>>>>
>>>> Thanks,
>>>> Milind
>>>>
>>>>
>>>> On Tue, Jul 25, 2017 at 6:56 AM, Antonio Scuri <[email protected]
>>>> > wrote:
>>>>
>>>>> The IupGLCanvasBox was designed to be a background drawing while the
>>>>> controls are drawn on the foreground. So I think that one possible
>>>>> approach
>>>>> is to use this glsubcanvas with zorder=top.
>>>>>
>>>>> In the error it seems that you are trying to set a non function as a
>>>>> callback. You should check that.
>>>>>
>>>>> Best,
>>>>> Scuri
>>>>>
>>>>> Em 24/07/2017 19:31, "Milind Gupta" <[email protected]> escreveu:
>>>>>
>>>>> I tried placing a glsubcanvas over the whole canvas box and tried to
>>>>> do all the drawing in the action callback of the subcanvas but I get this
>>>>> error then:
>>>>>
>>>>> [string "iuplua.lua"]:139: bad argument #3 to 'SetCallback' (Invalid
>>>>> function when set callback.)
>>>>> stack traceback:
>>>>> [C]: in function 'iuplua.SetCallback'
>>>>> [string "iuplua.lua"]:139: in metamethod '__newindex'
>>>>>
>>>>> In my program it points to the link where the action callback function
>>>>> starts.
>>>>>
>>>>> On Mon, Jul 24, 2017 at 3:16 PM, Milind Gupta <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Hi,
>>>>>> I notice that if I draw anything on the glcanvasbox it is
>>>>>> always behind the glcontrols like gllabel, etc. Is there a way for me to
>>>>>> draw and be on top of those controls?
>>>>>>
>>>>>> Thanks,
>>>>>> Milind
>>>>>>
>>>>>
>>>>>
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>>>>
>>>
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