// Created on: 2017-06-16
// Created by: Natalia ERMOLAEVA
// Copyright (c) 2017 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement. 

#if !defined _WIN32
#define QT_CLEAN_NAMESPACE         /* avoid definition of INT32 and INT8 */
#endif

#include <inspector/View_Window.hxx>

#include <inspector/View_Displayer.hxx>
#include <inspector/View_DisplayPreview.hxx>
#include <inspector/View_PreviewParameters.hxx>
#include <inspector/View_ToolBar.hxx>
#include <inspector/View_Viewer.hxx>
#include <inspector/View_Widget.hxx>

#include <V3d.hxx>

#include <Standard_WarningsDisable.hxx>
#include <QComboBox>
#include <QDockWidget>
#include <QGridLayout>
#include <QMenu>
#include <QToolBar>
#include <Standard_WarningsRestore.hxx>

const int DEFAULT_SPACING = 3;

// =======================================================================
// function : Constructor
// purpose :
// =======================================================================
View_Window::View_Window (QWidget* theParent,
                          const Handle(AIS_InteractiveContext)& theContext,
                          const bool isUseKeepView, const bool isFitAllActive)
: QWidget (theParent)
{
  QGridLayout* aViewLayout = new QGridLayout (this);
  aViewLayout->setContentsMargins (0, 0, 0, 0);
  aViewLayout->setSpacing (DEFAULT_SPACING);

  myView = new View_Widget (this, theContext, isFitAllActive);
  myViewToolBar = new View_ToolBar (this, isUseKeepView);
  aViewLayout->addWidget (myViewToolBar->GetControl(), 0, 0, 1, 2);
  connect (myViewToolBar, SIGNAL (contextChanged()), this, SLOT (onViewSelectorActivated()));
  connect (myViewToolBar, SIGNAL (actionClicked (int)),
          this, SLOT (onToolBarActionClicked (int)));

  connect (myView, SIGNAL (checkedStateChanged(int, bool)), this, SLOT (onCheckedStateChanged (int, bool)));

  myView->setContextMenuPolicy (Qt::CustomContextMenu);
  connect (myView, SIGNAL (customContextMenuRequested (const QPoint&)),
           this, SLOT (onViewContextMenuRequested (const QPoint&)));

  myActionsToolBar = new QToolBar (this);
  myActionsToolBar->layout()->setContentsMargins (0, 0, 0, 0);
  myActionsToolBar->setOrientation (Qt::Vertical);

  myActionsToolBar->addWidget (myView-> GetWidget (View_ViewActionType_FitAllId));
  for (int anActionId = View_ViewActionType_FitAreaId; anActionId <= View_ViewActionType_DisplayModeId; anActionId++)
    myActionsToolBar->addAction (myView->ViewAction ((View_ViewActionType)anActionId));

  aViewLayout->addWidget (myActionsToolBar, 1, 0);
  aViewLayout->addWidget (myView, 1, 1);
  aViewLayout->setRowStretch (1, 1);

  Handle(AIS_InteractiveContext) aContext = myView->GetViewer()->GetContext();
  myViewToolBar->SetContext (View_ContextType_Own, aContext);

  myDisplayer = new View_Displayer();
  if (!isUseKeepView)
    myDisplayer->KeepPresentations (true);
  myDisplayer->SetFitAllActive (isFitAllActive);
  connect (myView, SIGNAL (displayModeClicked()), this, SLOT (onDisplayModeChanged()));
  onViewSelectorActivated();
}

// =======================================================================
// function : SetContext
// purpose :
// =======================================================================
void View_Window::SetContext (View_ContextType /*theType*/, const Handle(AIS_InteractiveContext)& theContext)
{
  ViewToolBar()->SetContext (View_ContextType_External, theContext);
}

// =======================================================================
// function : SaveState
// purpose :
// =======================================================================
void View_Window::SaveState (View_Window* theView, QMap<QString, QString>& theItems,
                             const QString& thePrefix)
{
  QStringList aCameraDirection;
  Standard_Real aVX, aVY, aVZ;
  Handle(V3d_View) aView = theView->ViewWidget()->GetViewer()->GetView();
  if (aView.IsNull())
    return;

  aView->Proj (aVX, aVY, aVZ);
  aCameraDirection << QString::number (aVX) << QString::number (aVY) << QString::number (aVZ);

  theItems[thePrefix + "view_camera_direction"] = aCameraDirection.join (",");

  View_PreviewParameters::SaveState (theView->Displayer()->DisplayPreview()->GetPreviewParameters(), theItems, "preview_parameters_");
  View_ToolBar::SaveState (theView->ViewToolBar(), theItems, "view_toolbar_");
  View_Widget::SaveState (theView->ViewWidget(), theItems, "view_widget_");
}

// =======================================================================
// function : RestoreState
// purpose :
// =======================================================================
bool View_Window::RestoreState (View_Window* theView, const QString& theKey, const QString& theValue,
                                const QString& thePrefix)
{
  if (theKey == thePrefix + "view_camera_direction")
  {
    QStringList aValues = theValue.split (",");
    if (aValues.size() == 3)
    {
      Standard_Real aVX = aValues.at (0).toDouble();
      Standard_Real aVY = aValues.at (1).toDouble();
      Standard_Real aVZ = aValues.at (2).toDouble();

      theView->ViewWidget()->SetInitProj (aVX, aVY, aVZ);
    }
    return true;
  }
  else if (View_PreviewParameters::RestoreState (theView->Displayer()->DisplayPreview()->GetPreviewParameters(),
                                                 theKey, theValue, "preview_parameters_"))
  {
    return true;
  }
  else if (View_ToolBar::RestoreState (theView->ViewToolBar(), theKey, theValue, "view_toolbar_"))
  {
    return true;
  }
  else if (View_Widget::RestoreState (theView->ViewWidget(), theKey, theValue, "view_widget_"))
  {
    // display mode is restored
    View_Displayer* aDisplayer = theView->Displayer();
    if (theView->ViewWidget()->DisplayMode() != aDisplayer->DisplayMode())
      aDisplayer->SetDisplayMode (theView->ViewWidget()->DisplayMode());

    bool toFitAll = theView->ViewWidget()->IsActionChecked (View_ViewActionType_FitAllId);
    if (toFitAll != aDisplayer->IsFitAllActive())
      aDisplayer->SetFitAllActive (toFitAll);

    return true;
  }

  return false;
}

// =======================================================================
// function : onViewSelectorActivated
// purpose :
// =======================================================================
void View_Window::onViewSelectorActivated()
{
  View_ContextType aType = myViewToolBar->CurrentContextType();
  bool isViewEnabled = aType == View_ContextType_Own;

  myView->SetEnabledView (isViewEnabled);

  Handle(AIS_InteractiveContext) aContext = myViewToolBar->CurrentContext();
  myDisplayer->EraseAllPresentations (true);
  emit eraseAllPerformed();

  myDisplayer->SetContext (aContext);
}

// =======================================================================
// function : onToolBarActionClicked
// purpose :
// =======================================================================
void View_Window::onToolBarActionClicked (const int theActionId)
{
  switch (theActionId)
  {
    case View_ToolActionType_Trihedron:
    {
      myDisplayer->DisplayDefaultTrihedron (myViewToolBar->IsActionChecked (theActionId), Standard_True);
      break;
    }
    case View_ToolActionType_KeepViewId:
    {
      myDisplayer->KeepPresentations (myViewToolBar->IsActionChecked (theActionId));
      break;
    }
    case View_ToolActionType_KeepViewOffId:
    {
      myDisplayer->KeepPresentations (!myViewToolBar->IsActionChecked (theActionId));
      break;
    }
    case View_ToolActionType_ClearViewId:
    {
      myDisplayer->EraseAllPresentations (true);
      emit eraseAllPerformed();
      break;
    }
    default:
      break;
  }
}

// =======================================================================
// function : onCheckedStateChanged
// purpose :
// =======================================================================
void View_Window::onCheckedStateChanged (int theActionId, bool theState)
{
  if (theActionId == View_ViewActionType_FitAllId)
    myDisplayer->SetFitAllActive (theState);
}

// =======================================================================
// function : onViewContextMenuRequested
// purpose :
// =======================================================================
void View_Window::onViewContextMenuRequested (const QPoint& thePosition)
{
  QMenu* aMenu = new QMenu (this);
  QMenu* anOrientationSubMenu = aMenu->addMenu ("Set View Orientation");

  for (int i = 0; i < (int)V3d_XnegYnegZneg; i++)
  {
    V3d_TypeOfOrientation anOrientationType = (V3d_TypeOfOrientation)i;

    QAction* anAction = new QAction (V3d::TypeOfOrientationToString (anOrientationType), this);
    QObject::connect (anAction, SIGNAL (triggered (bool)), this, SLOT (onSetOrientation()));

    anOrientationSubMenu->addAction (anAction);
  }
  aMenu->addMenu (anOrientationSubMenu);

  QPoint aPoint = myView->mapToGlobal (thePosition);
  aMenu->exec (aPoint);
}

// =======================================================================
// function : onSetOrientation
// purpose :
// =======================================================================
void View_Window::onSetOrientation()
{
  QAction* anAction = (QAction*)(sender());

  TCollection_AsciiString anOrientationStr (anAction->text().toStdString().c_str());

  V3d_TypeOfOrientation anOrientationType;
  if (!V3d::TypeOfOrientationFromString (anOrientationStr.ToCString(), anOrientationType))
    return;

  Handle(V3d_View) aView = myView->GetViewer()->GetView();
  if (aView.IsNull())
    return;

  aView->SetProj (anOrientationType);
  aView->FitAll();
  aView->Redraw();
}

// =======================================================================
// function : onDisplayModeChanged
// purpose :
// =======================================================================
void View_Window::onDisplayModeChanged()
{
  int aDisplayMode = myView->DisplayMode();
  for (NCollection_DataMap<View_PresentationType, NCollection_Shared<AIS_ListOfInteractive> >::Iterator
       anIterator(myDisplayer->GetDisplayed()); anIterator.More(); anIterator.Next())
    myDisplayer->SetDisplayMode (aDisplayMode, anIterator.Key(), false);
  myDisplayer->UpdateViewer();
}