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/*=========================================================================
Program: Visualization Toolkit
Module: vtkButtonWidget.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 "vtkButtonWidget.h"
#include "vtkButtonRepresentation.h"
#include "vtkTexturedButtonRepresentation.h"
#include "vtkCommand.h"
#include "vtkCallbackCommand.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkObjectFactory.h"
#include "vtkRenderer.h"
#include "vtkWidgetEventTranslator.h"
#include "vtkWidgetCallbackMapper.h"
#include "vtkEvent.h"
#include "vtkWidgetEvent.h"
#include "vtkRenderWindow.h"
vtkStandardNewMacro(vtkButtonWidget);
//----------------------------------------------------------------------------------
vtkButtonWidget::vtkButtonWidget()
{
// Set the initial state
this->WidgetState = vtkButtonWidget::Start;
// Okay, define the events
this->CallbackMapper->SetCallbackMethod(vtkCommand::LeftButtonPressEvent,
vtkWidgetEvent::Select,
this, vtkButtonWidget::SelectAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::MouseMoveEvent,
vtkWidgetEvent::Move,
this, vtkButtonWidget::MoveAction);
this->CallbackMapper->SetCallbackMethod(vtkCommand::LeftButtonReleaseEvent,
vtkWidgetEvent::EndSelect,
this, vtkButtonWidget::EndSelectAction);
}
//----------------------------------------------------------------------
void vtkButtonWidget::CreateDefaultRepresentation()
{
if ( ! this->WidgetRep )
{
this->WidgetRep = vtkTexturedButtonRepresentation::New();
}
}
//----------------------------------------------------------------------------------
void vtkButtonWidget::MoveAction(vtkAbstractWidget *w)
{
vtkButtonWidget *self = reinterpret_cast<vtkButtonWidget*>(w);
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// Motion while selecting is ignored
if ( self->WidgetState == vtkButtonWidget::Selecting )
{
self->EventCallbackCommand->SetAbortFlag(1);
return;
}
// Get the new state and compare it to the old
int renderRequired = 0;
int state = self->WidgetRep->ComputeInteractionState(X, Y);
if ( self->WidgetState == vtkButtonWidget::Hovering )
{
if ( state == vtkButtonRepresentation::Outside )
{
renderRequired = 1;
if ( self->ManagesCursor )
{
self->RequestCursorShape(VTK_CURSOR_DEFAULT);
}
self->WidgetRep->Highlight(vtkButtonRepresentation::HighlightNormal);
self->WidgetState = vtkButtonWidget::Start;
}
}
else //state is Start
{
if ( state == vtkButtonRepresentation::Inside )
{
renderRequired = 1;
if ( self->ManagesCursor )
{
self->RequestCursorShape(VTK_CURSOR_HAND);
}
self->WidgetRep->Highlight(vtkButtonRepresentation::HighlightHovering);
self->WidgetState = vtkButtonWidget::Hovering;
self->EventCallbackCommand->SetAbortFlag(1);
}
}
if ( renderRequired )
{
self->Render();
}
}
//----------------------------------------------------------------------------------
void vtkButtonWidget::SelectAction(vtkAbstractWidget *w)
{
vtkButtonWidget *self = reinterpret_cast<vtkButtonWidget*>(w);
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
// The state must be hovering for anything to happen. MoveAction sets the
// state.
if ( self->WidgetState != vtkButtonWidget::Hovering )
{
return;
}
// Okay, make sure that the selection is in the current renderer
if (!self->CurrentRenderer || !self->CurrentRenderer->IsInViewport(X,Y))
{
self->WidgetState = vtkButtonWidget::Start;
return;
}
// We are definitely selected, Highlight as necessary.
self->WidgetState = vtkButtonWidget::Selecting;
self->WidgetRep->Highlight(vtkButtonRepresentation::HighlightSelecting);
self->EventCallbackCommand->SetAbortFlag(1);
self->Render();
}
//----------------------------------------------------------------------------------
void vtkButtonWidget::EndSelectAction(vtkAbstractWidget *w)
{
vtkButtonWidget *self = reinterpret_cast<vtkButtonWidget*>(w);
if ( self->WidgetState != vtkButtonWidget::Selecting )
{
return;
}
int X = self->Interactor->GetEventPosition()[0];
int Y = self->Interactor->GetEventPosition()[1];
int state = self->WidgetRep->ComputeInteractionState(X, Y);
if ( state == vtkButtonRepresentation::Outside )
{
if ( self->ManagesCursor )
{
self->RequestCursorShape(VTK_CURSOR_DEFAULT);
}
self->WidgetRep->Highlight(vtkButtonRepresentation::HighlightNormal);
self->WidgetState = vtkButtonWidget::Start;
}
else //state == vtkButtonRepresentation::Inside
{
if ( self->ManagesCursor )
{
self->RequestCursorShape(VTK_CURSOR_HAND);
}
self->WidgetRep->Highlight(vtkButtonRepresentation::HighlightHovering);
self->WidgetState = vtkButtonWidget::Hovering;
}
// Complete interaction
self->EventCallbackCommand->SetAbortFlag(1);
reinterpret_cast<vtkButtonRepresentation*>(self->WidgetRep)->NextState();
self->InvokeEvent(vtkCommand::StateChangedEvent,NULL);
self->Render();
}
//----------------------------------------------------------------------------------
void vtkButtonWidget::PrintSelf(ostream& os, vtkIndent indent)
{
//Superclass typedef defined in vtkTypeMacro() found in vtkSetGet.h
this->Superclass::PrintSelf(os,indent);
}
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