Select and delete a widget

Support
1

I am struggle to select an widget in order to delete it. I have an 2d image actor, and over this actor I intend to spread widgets. Nothing special. I have tried vtkDistanceWidget. Take a look what I have tried:

void CVTKDoc::CreateDistanceWidget(CVTKView* pView)
{
	vtkDistanceWidget* pDistanceWidget = vtkDistanceWidget::New();
	pDistanceWidget->SetInteractor(pView->m_pInteractor);
	pDistanceWidget->CreateDefaultRepresentation();
	static_cast<vtkDistanceRepresentation*>(pDistanceWidget->GetRepresentation())->SetLabelFormat(_T("%-#6.3g mm"));
	pDistanceWidget->On();
	m_pPropPicker->PickFromListOn();
	m_pPropPicker->AddPickList(vtkDistanceRepresentation2D::SafeDownCast(pDistanceWidget->GetRepresentation())->GetAxis());
	vtkDistanceWidgetCommand* pDistanceWidgetCommand = vtkDistanceWidgetCommand::New();
	m_pPropPicker->AddObserver(vtkCommand::PickEvent, pDistanceWidgetCommand);
	pDistanceWidgetCommand->Delete();
}

where m_pPropPicker is vtkPropPicker kind.

Here is the definition of vtkDistanceWidgetCommand:

#pragma once
#include <vtkCommand.h>

class vtkDistanceWidgetCommand : public vtkCommand
{
protected:
	vtkDistanceWidgetCommand();

public:
	virtual ~vtkDistanceWidgetCommand();

	static vtkDistanceWidgetCommand* New() { return new vtkDistanceWidgetCommand; }
	virtual void Execute(vtkObject* pCaller, unsigned long event, void* callData);
};

and

#include "stdafx.h"
#include "vtkDistanceWidgetCommand.h"

vtkDistanceWidgetCommand::vtkDistanceWidgetCommand()
{
}

vtkDistanceWidgetCommand::~vtkDistanceWidgetCommand()
{
}

void vtkDistanceWidgetCommand::Execute(vtkObject* pCaller, unsigned long event, void* callData)
{
	TRACE("======================================================\n");
}

but when I click on 2d image, even if I click over the widget or not, Isee no trace … prove that my code is not functional. For this solution, I got from here:

http://vtk.1045678.n5.nabble.com/Interactor-on-vtkWidget-td2848124.html

this idea. Can you lead me into solve this task ? I really need it ! :slight_smile:

2

I guess I solved … I am not sure though, but I come back here with feedback.

3

I have solved in hard way: I looping through all vtkWidgets to see what is the GetRepresentation pointer that fit my picked one. Seem not elegant to me … if someone has another solution, please tell me.