/*=========================================================================

   Program: ParaView
   Module:    $RCSfile$

   Copyright (c) 2005,2006 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2.

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
   Kitware Inc.
   28 Corporate Drive
   Clifton Park, NY 12065
   USA

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

========================================================================*/
#ifndef pqPipelineContextMenuBehavior_h
#define pqPipelineContextMenuBehavior_h

#include <QObject>
#include <QPoint> // needed for QPoint.
#include <QPointer>
#include <QList> // needed for QList.
#include "vtkType.h"
#include "pqApplicationComponentsModule.h"

class pqDataRepresentation;
class pqPipelineRepresentation;
class pqView;
class QAction;
class QMenu;

/// @ingroup Behaviors
///
/// This behavior manages showing up of a context menu with sensible pipeline
/// related actions for changing color/visibility etc. when the user
/// right-clicks on top of an object in the 3D view. Currently, it only supports
/// views with proxies that vtkSMRenderViewProxy subclasses.
class PQAPPLICATIONCOMPONENTS_EXPORT pqPipelineContextMenuBehavior : public QObject
{
  Q_OBJECT
  typedef QObject Superclass;
public:
  pqPipelineContextMenuBehavior(QObject* parent=0);
  virtual ~pqPipelineContextMenuBehavior();

protected slots:
  /// Called when a new view is added. We add actions to the widget for context
  /// menu if the view is a render-view.
  void onViewAdded(pqView*);

  /// called to hide the representation.
  void hide();

  /// called to hide the block. the action which emits the signal will
  /// contain the block index in its data().
  void hideBlock();

  /// called to show only the selected block. the action which emits the
  /// signal will contain the block index in its data().
  void showOnlyBlock();

  /// called to show all blocks.
  void showAllBlocks();

  /// called to unset the visibility flag for the block. after this call the
  /// block will inherit the visibility from its parent. the action which
  /// emits the signal will contain the block index in its data()
  void unsetBlockVisibility();

  /// called to set the color for the block. the action which emits the
  /// signal will contain the block index in its data()
  void setBlockColor();

  /// called to unset the color for the block. the action which emits the
  /// signal will contain the block index in its data()
  void unsetBlockColor();

  /// called to set the opacity for the block. the action which emits the
  /// signal will contain the block index in its data()
  void setBlockOpacity();

  /// called to unset the opacity for the block. the action which emits the
  /// signal will contain the block index in its data()
  void unsetBlockOpacity();

  /// called to change the representation type.
  void reprTypeChanged(QAction* action);

  /// called to change the coloring mode.
  void colorMenuTriggered(QAction* action);

protected:
  /// called to build the context menu for the given representation. If the
  /// picked representation was a composite data set the block index of the
  /// selected block will be passed in blockIndex.
  virtual void buildMenu(pqDataRepresentation* repr, unsigned int blockIndex);

  /// called to build the color arrays submenu.
  virtual void buildColorFieldsMenu(
    pqPipelineRepresentation* pipelineRepr, QMenu* menu);

  /// event filter to capture the right-click. We don't directly use mechanisms
  /// from QWidget to popup the context menu since all of those mechanism seem
  /// to eat away the right button release, leaving the render window in a
  /// dragging state.
  virtual bool eventFilter(QObject* caller, QEvent* e);

  /// return the name of the block from its flat index
  QString lookupBlockName(unsigned int flatIndex) const;

  QMenu* Menu;
  QPoint Position;
  QPointer<pqDataRepresentation> PickedRepresentation;
  QList<unsigned int> PickedBlocks;
private:
  Q_DISABLE_COPY(pqPipelineContextMenuBehavior)

};

#endif
