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vtkHoverWidget.cxx
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vtkHoverWidget.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkHoverWidget.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 "vtkHoverWidget.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkWidgetCallbackMapper.h"
#include "vtkWidgetEvent.h"
#include "vtkWidgetEventTranslator.h"
#include "vtkObjectFactory.h"
#include "vtkCallbackCommand.h"
#include "vtkEvent.h"
vtkStandardNewMacro(vtkHoverWidget);
//-------------------------------------------------------------------------
vtkHoverWidget::vtkHoverWidget()
{
this->WidgetState = Start;
this->TimerDuration = 250;
// Okay, define the events for this widget. Note that we look for extra events
// (like button press) because without it the hover widget thinks nothing has changed
// and doesn't begin retiming.
this->CallbackMapper->SetCallbackMethod(vtkCommand::LeftButtonPressEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MiddleButtonPressEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::RightButtonPressEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MouseWheelForwardEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MouseWheelBackwardEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MouseMoveEvent,
vtkWidgetEvent::Move,
this, vtkHoverWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::TimerEvent,
vtkWidgetEvent::TimedOut,
this, vtkHoverWidget::HoverAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::KeyPressEvent,
vtkEvent::AnyModifier, 13, 1, "Return",
vtkWidgetEvent::Select,
this, vtkHoverWidget::SelectAction);
}
//-------------------------------------------------------------------------
vtkHoverWidget::~vtkHoverWidget()
{
}
//----------------------------------------------------------------------
void vtkHoverWidget::SetEnabled(int enabling)
{
if ( enabling ) //----------------
{
vtkDebugMacro(<<"Enabling widget");
if ( this->Enabled ) //already enabled, just return
{
return;
}
if ( ! this->Interactor )
{
vtkErrorMacro(<<"The interactor must be set prior to enabling the widget");
return;
}
// We're ready to enable
this->Enabled = 1;
// listen for the events found in the EventTranslator
this->EventTranslator->AddEventsToInteractor(this->Interactor,
this->EventCallbackCommand,this->Priority);
// Start off the timer
this->TimerId = this->Interactor->CreateRepeatingTimer(this->TimerDuration);
this->WidgetState = vtkHoverWidget::Timing;
this->InvokeEvent(vtkCommand::EnableEvent,NULL);
}
else //disabling------------------
{
vtkDebugMacro(<<"Disabling widget");
if ( ! this->Enabled ) //already disabled, just return
{
return;
}
this->Enabled = 0;
this->Interactor->RemoveObserver(this->EventCallbackCommand);
this->InvokeEvent(vtkCommand::DisableEvent,NULL);
}
}
//-------------------------------------------------------------------------
void vtkHoverWidget::MoveAction(vtkAbstractWidget *w)
{
vtkHoverWidget *self = reinterpret_cast<vtkHoverWidget*>(w);
if ( self->WidgetState == vtkHoverWidget::Timing )
{
self->Interactor->DestroyTimer(self->TimerId);
}
else //we have already timed out, on this move we begin retiming
{
self->WidgetState = vtkHoverWidget::Timing;
self->SubclassEndHoverAction();
self->InvokeEvent(vtkCommand::EndInteractionEvent,NULL);
}
self->TimerId = self->Interactor->CreateRepeatingTimer(self->TimerDuration);
}
//-------------------------------------------------------------------------
void vtkHoverWidget::HoverAction(vtkAbstractWidget *w)
{
vtkHoverWidget *self = reinterpret_cast<vtkHoverWidget*>(w);
int timerId = *(reinterpret_cast<int*>(self->CallData));
// If this is the timer event we are waiting for...
if ( timerId == self->TimerId && self->WidgetState == vtkHoverWidget::Timing )
{
self->Interactor->DestroyTimer(self->TimerId);
self->WidgetState = vtkHoverWidget::TimedOut;
self->SubclassHoverAction();
self->InvokeEvent(vtkCommand::TimerEvent,NULL);
self->EventCallbackCommand->SetAbortFlag(1); //no one else gets this timer
}
}
//-------------------------------------------------------------------------
void vtkHoverWidget::SelectAction(vtkAbstractWidget *w)
{
vtkHoverWidget *self = reinterpret_cast<vtkHoverWidget*>(w);
// If widget is hovering we grab the selection event
if ( self->WidgetState == vtkHoverWidget::TimedOut )
{
self->SubclassSelectAction();
self->InvokeEvent(vtkCommand::WidgetActivateEvent,NULL);
self->EventCallbackCommand->SetAbortFlag(1); //no one else gets this event
}
}
//-------------------------------------------------------------------------
void vtkHoverWidget::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Timer Duration: " << this->TimerDuration << "\n";
}