Hi Antonio,
I was using the map_cb to initialize a lot of stuff for drawing
on the canvas and then doing the initial drawing. So I modified it to do
just the initializations and the drawing part is handled only by action_cb
and resize_cb now. By the time they are called it seems rastersize is
properly set so it seems to be working fine now.
Thanks,
Milind
On Wed, May 27, 2015 at 6:54 AM, Antonio Scuri <sc...@tecgraf.puc-rio.br>
wrote:
> Ok. Here is what`s going on.
>
> Since IUP has a dynamic layout there are several "sizes" when using
> rastersize. The SIZE attribute documentation and the Guide/Layout
> documentation describe them.
>
> I modified your code a little bit, just for clarity, and there are a few
> stages:
>
> Before map 500x500 - this is the user size (the size the app set),
> since the control is not mapped yet
> In map_cb nil - this is the current size, since it is mapped, but
> the dialog layout was not computed yet
> After map 500x500 - this is the current size, and the layout was
> computed
>
> Before 3.14, the layout was computed before the elements were mapped.
> This had several side effects. So we changed to do it after all elements
> were mapped. But the side effect was that the element current size is nil
> during map_cb.
>
> As an alternative, you can use the map_cb of the dialog, because it is
> the only one that is still called after the dialog layout was computed.
>
> You can consult the USERSIZE in map_cb that will be the initial size you
> set for the canvas. But it can be changed when the layout was computed.
>
> You can use RESIZE_CB, maybe.
>
> What you are doing in map_cb with rastersize? Maybe there are other
> alternatives...
>
> Best,
> Scuri
>
>
>
>
>
>
>
> On Wed, May 27, 2015 at 10:05 AM, Antonio Scuri <sc...@tecgraf.puc-rio.br>
> wrote:
>
>> Yes, that was the change.
>>
>> Hum, I don`t know why is reseting to nil. I'm going to take a look at
>> the sample and let you know.
>>
>> Best,
>> Scuri
>>
>>
>> On Tue, May 26, 2015 at 5:36 PM, Milind Gupta <milind.gu...@gmail.com>
>> wrote:
>>
>>> Hi Antonio,
>>> Previously when I was using iup 3.11 I was not having this
>>> issue. The way my code worked was that it called dialog:map() and I had a
>>> canvasBox:map_cb() defined which used the rastersize attribute of the
>>> canvasBox.
>>> I see in the map_cb documentation that there has been a change
>>> since 3.14, probably that is what is affecting me. When I debug my main
>>> application here is what I see:
>>>
>>> 1. I create glcanvasbox with an initial rastersize say "50x50" and I
>>> print it, it is fine.
>>> 2. I create the dialog and then print the rastersize again it is fine
>>> "50x50"
>>> 3. Now I call dialog:map()
>>> 4. This in turn calls canvasBox:map_cb() in which the first statement I
>>> have is to print the rastersize. Somehow as soon as it enters map_cb
>>> rastersize is set to nil.
>>>
>>> So to give you a test case I wrote the attached script which shows the
>>> problem. If this is the intended behavior then how do I get around it?
>>>
>>> Thanks,
>>> Milind
>>>
>>>
>>>
>>>
>>> On Tue, May 26, 2015 at 5:18 AM, Antonio Scuri <sc...@tecgraf.puc-rio.br
>>> > wrote:
>>>
>>>> When you create an element its size is not defined. If you not
>>>> manually set the size, then it will be available only when the layout of
>>>> the dialog is computed.
>>>>
>>>> The layout is automatically computed when the dialog is shown. If you
>>>> need the size before that, then there are alternatives. You can call
>>>> IupRefresh to compute the dialog, or you can call IupMap that internally
>>>> will call IupRefresh.
>>>>
>>>> Then size will not return nil/NULL.
>>>>
>>>> Best,
>>>> Scuri
>>>>
>>>>
>>>> On Tue, May 26, 2015 at 4:42 AM, Milind Gupta <milind.gu...@gmail.com>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>> I created a glcanvasbox. the rastersize attribute seems to
>>>>> be nil when I first access it. In what scenario can the rastersize be nil?
>>>>>
>>>>> Thanks,
>>>>> Milind
>>>>>
>>>>>
>>>>>
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