[vtkusers] synchronous update between vtkImagePlaneWidget and vtkResliceCursorWidget

[Dean Inglis]

Hi Mengda,

I am not familiar enough with the reslice cursor widget classes to advise
further.

I suggest you read the class documentation and do some experimenting to
figure
out a solution, perhaps starting with the events that the widget fires
during interaction.

Dean


On Sun, Aug 4, 2013 at 2:06 AM, Mengda Wu <wumengda at gmail.com> wrote:

> Hi Dean,
>
>    I am trying your solution for this problem. But what exactly should I
> do for
>       /** do something with ipwidget and rcwidget when the ipwidget fires
> a
>            an interaction event signal */?
>
>    For vtkImagePlaneWidget, we have UpdatePlacement() as done in
> Examples\GUI\Qt\FourPaneViewer\QtVTKRenderWindows.cxx. But we don't seem to
> have a similar method for vtkResliceCursorWidget. Could you please give a
> more detailed answer?
>
> Thanks,
> Mengda
>
>
> On Mon, Jun 24, 2013 at 10:44 AM, Dean Inglis <inglis.dl at gmail.com> wrote:
>
>> Hi,
>>
>> try the following code snippet.  Basically, create a callback class
>> wherein
>> you decide how to update the reslice cursor widget from the image plane
>> widget.
>> Add the callback to listen for the image plane widget's InteractionEvent.
>>
>> regards,
>> Dean
>>
>>
>> class myCallback : public vtkCommand
>> {
>>   public:
>>     static myCallback *New() {
>>       return new myCallback; }
>>
>>     void Execute( vtkObject* vtkNotUsed(caller), unsigned long
>> vtkNotUsed(event),
>>                   void * vtkNotUsed(callData) )
>>     {
>>       /** do something with ipwidget and rcwidget when the ipwidget fires
>> a
>>            an interaction event signal */
>>     }
>>
>>  myCallback():ipwidget( 0 ), rcwidget( 0 ){}
>>   ~myCallback(){ this->ipwidget= 0; this->rcwidget = 0; }
>>   vtkImagePlaneWidget* ipwidget;
>>   vtkResliceCursorWidget* rcwidget;
>> };
>>
>>
>> void myclass::some_setup_method()
>> {
>>   vtkSmartPointer<myCallback> cbk = vtkSmartPointer<myCallback>::New();
>>   cbk->ipwidget = this->ipwidget;
>>   cbk->rcwidget = this->rcwidget;
>>   this->ipwidget->AddObserver( vtkCommand::InteractionEvent, cbk );
>> }
>>
>>
>>
>> On Thu, Jun 20, 2013 at 10:15 PM, nil_debug <ljp19890525 at 163.com> wrote:
>>
>>> **
>>> Hello,
>>> Is anyone can help me? Now I have defined a vtkImagePlaneWidget and a
>>> vtkResliceCursorWidget,  I would like to when dragging the
>>>  vtkImagePlaneWidget the   vtkResliceCursorWidget can move.In a word  I
>>> don't know how to a "AddObserver" for the vtkImagePlaneWidget from
>>> the vtkResliceCursorWidget! I do know  I should define a "myCallBack",but
>>> How?
>>> Will be deeply grateful !
>>>
>>> ------------------------------
>>> nil_debug
>>>
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