[vtkusers] Why is the text of vtkCaptionWidget displayed at the default position no matter what position value I set?

[David Lonie]

Hmm...I don't deal with the widget / representation stuff very often, so
sorry about the dead ends!

It looks like the representation also keeps track of positions and sets
them on the caption actor, have you tried rep.SetPosition/rep.SetPosition2?

On Tue, Oct 25, 2016 at 10:39 AM, Liu_tj <tjlp at netease.com> wrote:

> Hi,David,
>
> Yes, I already call rep.SetAnchorPosition(pointer) to set the anchor
> position, which is also the attachment point.
>
> Thanks
> Liu Peng
>
>
> 在2016-10-25，"David Lonie" <david.lonie at kitware.com> 写道：
>
> -----原始邮件-----
> *发件人:*"David Lonie" <david.lonie at kitware.com>
> *发送时间:*2016年10月25日 星期二
> *收件人:*"Liu_tj" <tjlp at netease.com>
> *抄送:*"vtkusers" <vtkusers at vtk.org>
> *主题:*Re: Re: [vtkusers] Why is the text of vtkCaptionWidget displayed at
> the default position no matter what position value I set?
>
>
> Are you also setting the attachment point? From the vtkCaptionActor2D docs:
>
>  * To use the caption actor, you normally specify the Position and
> Position2
>  * coordinates (these are inherited from the vtkActor2D superclass). (Note
>  * that Position2 can be set using vtkActor2D's SetWidth() and SetHeight()
>  * methods.)  Position and Position2 define the size of the caption, and a
>  * third point, the AttachmentPoint, defines a point that the caption is
>  * associated with.
>
> Also relevant:
>
>  * The trickiest part about using this class is setting Position,
> Position2,
>  * and AttachmentPoint correctly. These instance variables are
>  * vtkCoordinates, and can be set up in various ways. In default usage, the
>  * AttachmentPoint is defined in the world coordinate system, Position is
> the
>  * lower-left corner of the caption and relative to AttachmentPoint
> (defined
>  * in display coordaintes, i.e., pixels), and Position2 is relative to
>  * Position and is the upper-right corner (also in display
>  * coordinates).
>
> HTH,
> Dave
>
> On Tue, Oct 25, 2016 at 10:02 AM, Liu_tj <tjlp at netease.com> wrote:
>
>> Hi, David,
>>
>> I follow your tips. It doesn't work. The text is still displayed at the
>> default position.
>>
>> Thanks
>> Liu Peng
>>
>>
>>
>> 在2016-10-24，"David Lonie" <david.lonie at kitware.com> 写道：
>>
>>
>> *收件人:*"Liu_tj" <tjlp at netease.com>
>> *抄送:*"vtkusers" <vtkusers at vtk.org>
>> *主题:*Re: [vtkusers] Why is the text of vtkCaptionWidget displayed at the
>> default position no matter what position value I set?
>>
>>
>> On Sun, Oct 23, 2016 at 11:13 AM, Liu_tj <tjlp at netease.com> wrote:
>>
>>> Hi, VTK guys,
>>>
>>> When I display a vtkCaptionWidget, I want to set the position of the
>>> text. So I call the vtkActor2D:;SetPostion() and SetPosition2(), but when
>>> the widget is displayed, the text is alway at the left bottom corner, why?
>>> Below is my C# code:
>>> [snip]
>>> rep.GetCaptionActor2D().GetTextActor().SetPosition(textPos1[0],
>>> textPos1[1]);
>>> rep.GetCaptionActor2D().GetTextActor().SetPosition2(textPos2[0],
>>> textPos2[1]);
>>>
>>
>> Try just setting the position of the caption actor itself. When the
>> caption actor renders, it sets the text actor's position. So,
>>
>> rep.GetCaptionActor2D().SetPosition(textPos1[0], textPos1[1]);
>> rep.GetCaptionActor2D().SetPosition2(textPos2[0], textPos2[1]);
>>
>> should get you what you want.
>>
>> HTH,
>> Dave
>>
>>
>>
>>
>>
>
>
>
>
>
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