[vtkusers] How to remove points/handle from one vtkDistanceWidget or vtkAngleWidget?

[Shashwath T.R.]

Thanks Karthik, this is something that I was contemplating for a very long
time!

Regards,
Shash

On Tue, Jul 20, 2010 at 12:14 AM, Karthik Krishnan <
karthik.krishnan at kitware.com> wrote:

> Arnaud:
>
> I just pushed a bunch of changes. The class vtkDistanceWidget,
> vtkAngleWidget and vtkBiDimensionalWidget all now have the following two
> methods :
>
>   // Description:
>   // Set the state of the widget to "defined" (in case its widget and its
>   // representation were initialized programmatically). This must generally
>   // be followed by a Render() for things to visually take effect.
>   virtual void WidgetIsDefined();
>
>   // Description:
>   // Has the widget been defined completely yet ? ie. Have the end points
> been
>   // laid and is it in Manipulate mode ?
>   virtual int IsWidgetDefined();
>
>
> So what you can do is :
>
>  representation->SetPoint1WorldPosition(...)
>  representation->SetPoint2WorldPosition(...)
>  distanceWidget->SetRepresentation(representation);
>  distanceWidget->EnabledOn();
>  distanceWidget->WidgetIsDefined();
>  distanceWidget->Render();
>
> Internally, the WidgetIsDefined() call, sets the widget state to
> "manipulate", releases any focus that it may have grabbed during the define
> phase, builds the representation and shows/hides the handles properly.
>
> The same is the case for the other 2 widgets....
>
> If I can slowly add it to a good number of widgets (several widgets have a
> "define" phase during which their query is invalid), then I'd like to make
> this a default no-op method in the base class, vtkAbstractWidget, so that
> subclasses can implement it in whatever way they choose to.
>
> Please let me know if you have any issues.
>
> Thanks
> --
> karthik
>
>
>
> On Fri, Jul 16, 2010 at 12:38 AM, Karthik Krishnan <
> karthik.krishnan at kitware.com> wrote:
>
>> Yes. That's missing and its an often needed feature. I'll add this
>> functionality in tomorrow Arnaud.
>>
>> Thanks
>> --
>> karthik
>>
>>
>> On Thu, Jul 15, 2010 at 7:37 PM, Arnaud GELAS <
>> arnaud_gelas at hms.harvard.edu> wrote:
>>
>>>  Actually I am more interested in being able to reinitialize these
>>> widgets.
>>> For instance, when you want to measure different objects that are far
>>> apart, and I guess it would be faster to reinitialize the widget than to
>>> drag these points to another part of my image (quite far from here).
>>>
>>> How should I proceed?
>>>
>>> Thanks,
>>> Arnaud
>>>
>>>
>>> On 07/15/2010 09:56 AM, Karthik Krishnan wrote:
>>>
>>> How can the widget exist in a valid state without its end points ? Do you
>>> mean you want to re-define the widget from start in response to a key press
>>> ?
>>>
>>> Please let us know.
>>>
>>> Thanks
>>> --
>>> karthik
>>>
>>> On Thu, Jul 15, 2010 at 7:21 PM, Arnaud GELAS <
>>> arnaud_gelas at hms.harvard.edu> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I would like to be able to
>>>>  * delete points/handles from these widgets with a key
>>>>  * reinitialize these widgets without any points/handle on the screen.
>>>>
>>>> I could not figure out how to proceed?
>>>> Is it possible with the existing code?
>>>>
>>>> Thanks,
>>>>
>>>> Best Regards,
>>>> Arnaud
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>>>
>>>
>>
>
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