[RQt-devel] scale of view for some primitive doesn't work

[Tengfei Yin]

On Fri, Nov 12, 2010 at 7:09 AM, Michael Lawrence <lawrence.michael at gene.com
> wrote:

>
>
> On Thu, Nov 11, 2010 at 9:35 PM, Tengfei Yin <yintengfei at gmail.com> wrote:
>
>>
>>
>> On Thu, Nov 11, 2010 at 10:27 PM, Michael Lawrence <
>> lawrence.michael at gene.com> wrote:
>>
>>>
>>>
>>> On Thu, Nov 11, 2010 at 7:32 PM, Tengfei Yin <yintengfei at gmail.com>wrote:
>>>
>>>> So even when you use view$rotate(), the text direction won't change..is
>>>> this also what we expected to see?
>>>>
>>>>
>>> Yes. I can see how that may not always be desirable, but it would be
>>> tough to work around it. That is, I cannot tease out the rotation from the
>>> rest of the transformation. In the case of a word cloud, I think it would be
>>> desirable, i.e., one is thinking of the text as glyphs that are independent
>>> of the scales.
>>>
>>>
>>>> and by the way, do you know any way to change to text size, the use case
>>>> here is sth like "tag cloud", but I guess I can draw text as path to solve
>>>> this problem.
>>>>
>>>>
>>> Just change the font.. do you want some sort of vectorized "cex" argument
>>> to qdrawText? Might not be that hard to add.
>>>
>>
>> Yes, if you don't mind spend some time on it, it will be really nice to
>> have a control over the text size, e.g. when I plot a sequence data, like
>> ACTGGGC....I can resize one single character  to address the mis-alignment.
>>
>
> You mean like a sequence logo plot, based on the counts of each base? Sweet
> idea. The feature is committed, have fun.
>

Yes, I plan to do sth like this~the problem of this kind of graphic is that,
no problem showing as a single plot, but when showing along a shot-read
alighment, due to resale of all the text, even a single size change of one
base will make it hard to align a single sequence with other "normal" text.
I will work around this to see if I have some problem.

Btw: any idea where is globalPos(), I try to use tooltip associated with
locate() function to do this：when mouse over on exon, show the id, but I can
only find pos, based on the documentation, it looks like I need to get
globalPos..of course I have alternative workaround instead of using
QToolTip.

Thanks

>
>
>>
>>> Michael
>>>
>>>
>>>>
>>>> On Thu, Nov 11, 2010 at 6:14 PM, Tengfei Yin <yintengfei at gmail.com>wrote:
>>>>
>>>>>
>>>>>
>>>>> On Thu, Nov 11, 2010 at 5:39 PM, Michael Lawrence <
>>>>> lawrence.michael at gene.com> wrote:
>>>>>
>>>>>> This is by design. If this didn't work that way, then when the user
>>>>>> zoomed into a chromosome, for example, the text labels would get really
>>>>>> stretched out. Glyphs are the same way (they're essentially fancy
>>>>>> characters). Zooming into a scatterplot should not make the glyphs larger.
>>>>>> Circles (after much debate inside my head) behave the same as glyphs. This
>>>>>> is because their radius, like in a bubble plot, is derived from something
>>>>>> other than the X and Y axes.
>>>>>>
>>>>>> Shapes however, like rectangles, polygons and paths, are zoomed. You
>>>>>> expect a mosaic plot rectangle or a map polygon to scale with the plot.
>>>>>>
>>>>>>
>>>>> This make sense to me, in most cases, i guess people won't expect the
>>>>> circle or text to be  zoomed in.
>>>>>
>>>>> Are you sure you really need the text to scale with the zoom? Deepayan
>>>>>> and I decided a long time ago that zooming does not behave like a
>>>>>> "magnifying glass." It rescales the plot.
>>>>>>
>>>>>>
>>>>> No, you don't have to change that, it's convenient so far, I am just
>>>>> curious why this doesn't work for text and circle, because in other rare
>>>>> case, I will draw very small text as labels of axis for one circular track,
>>>>> or if I draw points around the circular track, I am still expecting the
>>>>> points will be zoomed in when I rescale the view. I guess I am confused the
>>>>> "rescale of the view" with the one you defined with Deepayan, but it make
>>>>> sense to me.
>>>>>
>>>>> There are some ways to get around this if you really want to:
>>>>>> - Draw the text as a path.
>>>>>> - Use the "render" method on the scene to render to a QPicture,
>>>>>> rescale that and display it. This is how I imagined someone making a
>>>>>> magnifying glass. QPicture is a vectorized representation, so no nasty
>>>>>> scaling artifacts are introduced.
>>>>>>
>>>>>
>>>>> Thanks, I think I need to do it in this way, if I really need them to
>>>>> be rescaled.  I never try QPicture before, I will take a look at it.
>>>>>
>>>>>
>>>>>> Michael
>>>>>>
>>>>>> On Thu, Nov 11, 2010 at 3:24 PM, Tengfei Yin <yintengfei at gmail.com>wrote:
>>>>>>
>>>>>>> Hi
>>>>>>>
>>>>>>> Here comes another question with text, please see the attached  code
>>>>>>> below, only rect could be resized,  when I call v$scale()
>>>>>>>
>>>>>>> text, circle doesn't change. it happens to visnab, the circular view,
>>>>>>> when I scale the view, every thing resize but the text, it's still in the
>>>>>>> same size.
>>>>>>>
>>>>>>> library(qtpaint)
>>>>>>> s <- qscene()
>>>>>>> test_layer <- qlayer(s,function(layer,painter){
>>>>>>>   qdrawRect(painter,30,30,70,70,stroke="blue")
>>>>>>>   qdrawCircle(painter,50,50,20,stroke="red")
>>>>>>>   qdrawText(painter,"TEST",50,50)
>>>>>>> },limits=qrect(0,0,100,100))
>>>>>>> v <- qplotView(s)
>>>>>>> v$show()
>>>>>>>
>>>>>>> v$scale(1.5,1.5)
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>> Tengfei
>>>>>>> --
>>>>>>> Tengfei Yin
>>>>>>> MCDB PhD student
>>>>>>> 1620 Howe Hall, 2274,
>>>>>>> Iowa State University
>>>>>>> Ames, IA,50011-2274
>>>>>>> Homepage: www.tengfei.name
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Qtinterfaces-devel mailing list
>>>>>>> Qtinterfaces-devel at lists.r-forge.r-project.org
>>>>>>>
>>>>>>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/qtinterfaces-devel
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Tengfei Yin
>>>>> MCDB PhD student
>>>>> 1620 Howe Hall, 2274,
>>>>> Iowa State University
>>>>> Ames, IA,50011-2274
>>>>> Homepage: www.tengfei.name
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Tengfei Yin
>>>> MCDB PhD student
>>>> 1620 Howe Hall, 2274,
>>>> Iowa State University
>>>> Ames, IA,50011-2274
>>>> Homepage: www.tengfei.name
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Qtinterfaces-devel mailing list
>>>> Qtinterfaces-devel at lists.r-forge.r-project.org
>>>>
>>>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/qtinterfaces-devel
>>>>
>>>>
>>>
>>
>>
>> --
>> Tengfei Yin
>> MCDB PhD student
>> 1620 Howe Hall, 2274,
>> Iowa State University
>> Ames, IA,50011-2274
>> Homepage: www.tengfei.name
>>
>>
>>
>


-- 
Tengfei Yin
MCDB PhD student
1620 Howe Hall, 2274,
Iowa State University
Ames, IA,50011-2274
Homepage: www.tengfei.name
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