[vtkusers] Mouse button release event is still broken in VTK 6.0.0 !
Carlos
VTK at calculoandamios.com
Sat Dec 7 03:58:57 EST 2013
+1
-----Mensaje original-----
De: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] En nombre de David Cole
Enviado el: viernes, 06 de diciembre de 2013 12:41
Para: wumengda at gmail.com; vtkusers at vtk.org
CC: clinton at elemtech.com; maxim.privalov at gmail.com
Asunto: Re: [vtkusers] Mouse button release event is still broken in VTK 6.0.0 !
Hi Mengda,
This is not really "broken" -- it's more "by design," but with an unfortunately non-obvious way to do what you want.
If, instead of adding your observers to the render window interactor, you add them to the interactor's current style, you will see that the events are indeed invoked. But by default, the interactor style "eats"
the left button up event such that the render window interactor never sees it. You can change this behavior by creating your own custom interactor style if you want to override it. (Or use one of the many other different types of interactor style available in VTK.)
I added your code to this example...
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Interaction/ObserverMemberFunction
...and then put this code just before the call to "Start":
...
vtkInteractorObserver *currentStyle =
renderWindowInteractor->GetInteractorStyle();
std::cout << "currentStyle class name: " <<
currentStyle->GetClassName() << std::endl;
vtkInteractorStyleSwitch *iss =
vtkInteractorStyleSwitch::SafeDownCast(currentStyle);
vtkInteractorObserver *actualStyle = iss->GetCurrentStyle();
std::cout << "actualStyle class name: " <<
actualStyle->GetClassName() << std::endl;
vtkSmartPointer<CRRotateCallBack> crk =
vtkSmartPointer<CRRotateCallBack>::New();
actualStyle->AddObserver(vtkCommand::LeftButtonPressEvent, crk,
10.0f);
//actualStyle->AddObserver(vtkCommand::MouseMoveEvent, crk, 10.0f);
actualStyle->AddObserver(vtkCommand::LeftButtonReleaseEvent, crk,
10.0f);
renderWindowInteractor->Start();
...
One more change: I changed the beginning of your Execute callback to
expect a different type of caller object:
vtkInteractorObserver *iobs =
vtkInteractorObserver::SafeDownCast(caller);
if( !iobs )
{
return;
}
The output looks like this when I run it and click in the window:
currentStyle class name: vtkInteractorStyleSwitch
actualStyle class name: vtkInteractorStyleJoystickCamera
LeftButtonPressEvent
LeftButtonReleaseEvent
HTH,
David C.
-----Original Message-----
From: Mengda Wu <wumengda at gmail.com>
To: vtkusers <vtkusers at vtk.org>
Cc: clinton <clinton at elemtech.com>; EvilMax <maxim.privalov at gmail.com>
Sent: Sun, Dec 1, 2013 9:19 pm
Subject: [vtkusers] Mouse button release event is still broken in VTK
6.0.0 !
Hi all,
I found this series is very relevant to my issue.
I am also trying to catch the LeftButtonReleaseEvent event in VTK
6.0.0. I believe it is still broken. Basically, I added observers of
LeftButtonPressEvent, MouseMoveEvent, and LeftButtonReleaseEvent to
RenderWindowInteractor. Only LeftButtonPressEvent and MouseMoveEvent
got tracked in the C++ callback function. No LeftButtonReleaseEvent was
observed.
What I did was:
vtkSmartPointer<CRRotateCallBack> crk =
vtkSmartPointer<CRRotateCallBack>::New();
this->ui->view1->GetInteractor()->AddObserver(vtkCommand::LeftButtonPress
Event, crk, 10.0f);
this->ui->view1->GetInteractor()->AddObserver(vtkCommand::MouseMoveEvent,
crk, 10.0f);
this->ui->view1->GetInteractor()->AddObserver(vtkCommand::LeftButtonRelea
seEvent, crk, 10.0f);
class CRRotateCallBack : public vtkCommand
{
public:
static CRRotateCallBack *New() {return new CRRotateCallBack;}
virtual void Execute(vtkObject *caller, unsigned long eventId,
void*)
{
vtkRenderWindowInteractor *iren =
vtkRenderWindowInteractor::SafeDownCast(caller);
if( !iren ) return;
if( eventId == vtkCommand::LeftButtonPressEvent )
{
std::cout << "LeftButtonPressEvent" << std::endl;
}
else if( eventId == vtkCommand::MouseMoveEvent )
{
std::cout << "MouseMoveEvent " << std::endl;
}
else if( eventId == vtkCommand::LeftButtonReleaseEvent )
//for some reason, this left mouse release event never gets here
{
std::cout << "LeftButtonReleaseEvent " << std::endl;
}
}
};
Thanks,
Mengda
On Mon, Oct 31, 2011 at 4:25 PM, Sebastien Jourdain
<sebastien.jourdain at kitware.com> wrote:
Hi Max,
I get that but when I was monitoring the event that was happening on a
C++ observer, I've noticed the following order.
LeftButtonPressEvent
StartInteractionEvent
ModifiedEvent
EndInteractionEvent
RenderEvent
So despite the fact that ReleaseEvent is not properly propagated (even
in the C++ layer), I was wondering if you could rely on the
EndInteractionEvent while we fix this bug ? Because, this event seems
to map at the release time...
Does it make sense ?
At lease let me know if this could fix your issue temporarily...
Thanks,
Seb
PS: If I get more time, I will track down the reason why the
ReleaseEvent get digested...
On Mon, Oct 31, 2011 at 4:16 PM, EvilMax <maxim.privalov at gmail.com>
wrote:
> Hi, Sebastien!
>
> I need to implement dragging of an actors, so I really need to track
mouse
> button release event.
>
> --
> View this message in context:
http://vtk.1045678.n5.nabble.com/Mouse-button-release-is-still-broken-in-5-8-0-tp4949887p4953458.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
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