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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPolyLineWidget.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkPolyLineWidget.h"
#include "vtkCallbackCommand.h"
#include "vtkCommand.h"
#include "vtkEvent.h"
#include "vtkObjectFactory.h"
#include "vtkPolyLineRepresentation.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkWidgetCallbackMapper.h"
#include "vtkWidgetEvent.h"
#include "vtkWidgetEventTranslator.h"
vtkStandardNewMacro(vtkPolyLineWidget);
//----------------------------------------------------------------------------
vtkPolyLineWidget::vtkPolyLineWidget()
{
this->WidgetState = vtkPolyLineWidget::Start;
this->ManagesCursor = 1;
// Define widget events
this->CallbackMapper->SetCallbackMethod(vtkCommand::LeftButtonPressEvent,
vtkWidgetEvent::Select,
this, vtkPolyLineWidget::SelectAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::LeftButtonReleaseEvent,
vtkWidgetEvent::EndSelect,
this, vtkPolyLineWidget::EndSelectAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MiddleButtonPressEvent,
vtkWidgetEvent::Translate,
this, vtkPolyLineWidget::TranslateAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MiddleButtonReleaseEvent,
vtkWidgetEvent::EndTranslate,
this, vtkPolyLineWidget::EndSelectAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::RightButtonPressEvent,
vtkWidgetEvent::Scale,
this, vtkPolyLineWidget::ScaleAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::RightButtonReleaseEvent,
vtkWidgetEvent::EndScale,
this, vtkPolyLineWidget::EndSelectAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MouseMoveEvent,
vtkWidgetEvent::Move,
this, vtkPolyLineWidget::MoveAction);
}
//----------------------------------------------------------------------------
vtkPolyLineWidget::~vtkPolyLineWidget()
{
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::SelectAction(vtkAbstractWidget *w)
{
// We are in a static method, cast to ourself
vtkPolyLineWidget *self = vtkPolyLineWidget::SafeDownCast(w);
// Get the event position
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// Okay, make sure that the pick is in the current renderer
if ( !self->CurrentRenderer ||
!self->CurrentRenderer->IsInViewport(X,Y) )
{
self->WidgetState = vtkPolyLineWidget::Start;
return;
}
// Begin the widget interaction which has the side effect of setting the
// interaction state.
double e[2];
e[0] = static_cast<double>(X);
e[1] = static_cast<double>(Y);
self->WidgetRep->StartWidgetInteraction(e);
int interactionState = self->WidgetRep->GetInteractionState();
if ( interactionState == vtkPolyLineRepresentation::Outside )
{
return;
}
// We are definitely selected
self->WidgetState = vtkPolyLineWidget::Active;
self->GrabFocus(self->EventCallbackCommand);
if (interactionState == vtkPolyLineRepresentation::OnLine &&
self->Interactor->GetControlKey())
{
// Add point.
reinterpret_cast<vtkPolyLineRepresentation*>(self->WidgetRep)->
SetInteractionState(vtkPolyLineRepresentation::Inserting);
}
else if (interactionState == vtkPolyLineRepresentation::OnHandle &&
self->Interactor->GetShiftKey())
{
// remove point.
reinterpret_cast<vtkPolyLineRepresentation*>(self->WidgetRep)->
SetInteractionState(vtkPolyLineRepresentation::Erasing);
}
else
{
reinterpret_cast<vtkPolyLineRepresentation*>(self->WidgetRep)->
SetInteractionState(vtkPolyLineRepresentation::Moving);
}
// start the interaction
self->EventCallbackCommand->SetAbortFlag(1);
self->StartInteraction();
self->InvokeEvent(vtkCommand::StartInteractionEvent,NULL);
self->Render();
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::TranslateAction(vtkAbstractWidget *w)
{
// Not sure this should be any different that SelectAction
vtkPolyLineWidget::SelectAction(w);
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::ScaleAction(vtkAbstractWidget *w)
{
// We are in a static method, cast to ourself
vtkPolyLineWidget *self = reinterpret_cast<vtkPolyLineWidget*>(w);
// Get the event position
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// Okay, make sure that the pick is in the current renderer
if ( !self->CurrentRenderer ||
!self->CurrentRenderer->IsInViewport(X,Y) )
{
self->WidgetState = vtkPolyLineWidget::Start;
return;
}
// Begin the widget interaction which has the side effect of setting the
// interaction state.
double e[2];
e[0] = static_cast<double>(X);
e[1] = static_cast<double>(Y);
self->WidgetRep->StartWidgetInteraction(e);
int interactionState = self->WidgetRep->GetInteractionState();
if ( interactionState == vtkPolyLineRepresentation::Outside )
{
return;
}
// We are definitely selected
self->WidgetState = vtkPolyLineWidget::Active;
self->GrabFocus(self->EventCallbackCommand);
//Scale
reinterpret_cast<vtkPolyLineRepresentation*>(self->WidgetRep)->
SetInteractionState(vtkPolyLineRepresentation::Scaling);
// start the interaction
self->EventCallbackCommand->SetAbortFlag(1);
self->StartInteraction();
self->InvokeEvent(vtkCommand::StartInteractionEvent,NULL);
self->Render();
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::MoveAction(vtkAbstractWidget *w)
{
vtkPolyLineWidget *self = reinterpret_cast<vtkPolyLineWidget*>(w);
// See whether we're active
if ( self->WidgetState == vtkPolyLineWidget::Start )
{
return;
}
// compute some info we need for all cases
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// Okay, adjust the representation
double e[2];
e[0] = static_cast<double>(X);
e[1] = static_cast<double>(Y);
self->WidgetRep->WidgetInteraction(e);
// moving something
self->EventCallbackCommand->SetAbortFlag(1);
self->InvokeEvent(vtkCommand::InteractionEvent,NULL);
self->Render();
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::EndSelectAction(vtkAbstractWidget *w)
{
vtkPolyLineWidget *self = reinterpret_cast<vtkPolyLineWidget*>(w);
if ( self->WidgetState == vtkPolyLineWidget::Start )
{
return;
}
// compute some info we need for all cases
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// Okay, adjust the representation
double e[2];
e[0] = static_cast<double>(X);
e[1] = static_cast<double>(Y);
self->WidgetRep->EndWidgetInteraction(e);
// Return state to not active
self->WidgetState = vtkPolyLineWidget::Start;
reinterpret_cast<vtkPolyLineRepresentation*>(self->WidgetRep)->
SetInteractionState(vtkPolyLineRepresentation::Outside);
self->ReleaseFocus();
self->EventCallbackCommand->SetAbortFlag(1);
self->EndInteraction();
self->InvokeEvent(vtkCommand::EndInteractionEvent,NULL);
self->Render();
}
//----------------------------------------------------------------------
void vtkPolyLineWidget::CreateDefaultRepresentation()
{
if ( ! this->WidgetRep )
{
this->WidgetRep = vtkPolyLineRepresentation::New();
}
}
//----------------------------------------------------------------------------
void vtkPolyLineWidget::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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