#include "toonzqt/schematicviewer.h"

// TnzQt includes

#include "toonzqt/schematicnode.h"

#include "toonzqt/fxschematicnode.h"

#include "toonzqt/schematicgroupeditor.h"

#include "toonzqt/stageschematicscene.h"

#include "toonzqt/fxschematicscene.h"

#include "toonzqt/menubarcommand.h"

#include "toonzqt/tselectionhandle.h"

#include "toonzqt/gutil.h"

#include "toonzqt/imageutils.h"

#include "toonzqt/dvscrollwidget.h"

// TnzLib includes

#include "toonz/txsheethandle.h"

#include "toonz/tcolumnhandle.h"

#include "toonz/tobjecthandle.h"

#include "toonz/tfxhandle.h"

#include "toonz/txsheet.h"

#include "toonz/txshlevelcolumn.h"

#include "toonz/tcolumnfx.h"

#include "toonz/txshzeraryfxcolumn.h"

#include "toonz/preferences.h"

#include "toonz/fxdag.h"

#include "toonz/tapplication.h"

#include "toonz/tscenehandle.h"

// Qt includes

#include <qgraphicsscenemouseevent></qgraphicsscenemouseevent>

#include <qmouseevent></qmouseevent>

#include <qgraphicsitem></qgraphicsitem>

#include <qtoolbar></qtoolbar>

#include <qtoolbutton></qtoolbutton>

#include <qmenu></qmenu>

#include <qicon></qicon>

#include <qaction></qaction>

#include <qmainwindow></qmainwindow>

#include <qvboxlayout></qvboxlayout>

// STD includes

#include "assert.h"

#include "math.h"

namespace {

class SchematicZoomer : public ImageUtils::ShortcutZoomer {

public:

  SchematicZoomer(QWidget *parent) : ShortcutZoomer(parent) {}

  bool zoom(bool zoomin, bool resetZoom) override {

    static_cast<schematicsceneviewer *="">(getWidget())->zoomQt(zoomin, resetZoom);</schematicsceneviewer>

    return true;

  }

};

}  // namespace

//==================================================================

//

// SchematicScene

//

//==================================================================

SchematicScene::SchematicScene(QWidget *parent) : QGraphicsScene(parent) {

  setSceneRect(0, 0, 50000, 50000);

  setItemIndexMethod(NoIndex);

}

//------------------------------------------------------------------

SchematicScene::~SchematicScene() { clearAllItems(); }

//------------------------------------------------------------------

void SchematicScene::showEvent(QShowEvent *se) {

  TSelectionHandle *selHandle = TSelectionHandle::getCurrent();

  connect(selHandle, SIGNAL(selectionSwitched(TSelection *, TSelection *)),

          this, SLOT(onSelectionSwitched(TSelection *, TSelection *)));

  clearSelection();

}

//------------------------------------------------------------------

void SchematicScene::hideEvent(QHideEvent *se) {

  TSelectionHandle *selHandle = TSelectionHandle::getCurrent();

  disconnect(selHandle, SIGNAL(selectionSwitched(TSelection *, TSelection *)),

             this, SLOT(onSelectionSwitched(TSelection *, TSelection *)));

}

//------------------------------------------------------------------

/*! Removes and then deletes all item in the scene.

*/

void SchematicScene::clearAllItems() {

  clearSelection();

  m_highlightedLinks.clear();

  QList<schematicwindoweditor *=""> editors;</schematicwindoweditor>

  QList<schematicnode *=""> nodes;</schematicnode>

  QList<schematiclink *=""> links;</schematiclink>

  int i;

  QList<qgraphicsitem *=""> sceneItems = items();</qgraphicsitem>

  int size                          = sceneItems.size();

  // create nodes and links list

  for (i = 0; i < size; i++) {

    QGraphicsItem *item           = sceneItems.at(i);

    SchematicWindowEditor *editor = dynamic_cast<schematicwindoweditor *="">(item);</schematicwindoweditor>

    SchematicNode *node           = dynamic_cast<schematicnode *="">(item);</schematicnode>

    SchematicLink *link           = dynamic_cast<schematiclink *="">(item);</schematiclink>

    if (editor) editors.append(editor);

    if (node) nodes.append(node);

    if (link) links.append(link);

  }

  while (links.size() > 0) {

    SchematicLink *link = links.back();

    removeItem(link);

    links.removeLast();

    SchematicPort *startPort = link->getStartPort();

    SchematicPort *endPort   = link->getEndPort();

    if (startPort) startPort->removeLink(link);

    if (endPort) endPort->removeLink(link);

    delete link;

  }

  while (editors.size() > 0) {

    SchematicWindowEditor *editor = editors.back();

    removeItem(editor);

    editors.removeLast();

    delete editor;

  }

  while (nodes.size() > 0) {

    SchematicNode *node = nodes.back();

    removeItem(node);

    nodes.removeLast();

    delete node;

  }

  assert(items().size() == 0);

}

//------------------------------------------------------------------

/*! check if any item exists in the rect

*/

bool SchematicScene::isAnEmptyZone(const QRectF &rect) {

  QList<qgraphicsitem *=""> allItems = items();</qgraphicsitem>

  for (auto const level : allItems) {

    SchematicNode *node = dynamic_cast<schematicnode *="">(level);</schematicnode>

    if (!node) continue;

    FxSchematicNode *fxNode = dynamic_cast<fxschematicnode *="">(node);</fxschematicnode>

    if (fxNode && fxNode->isA(eXSheetFx)) continue;

    if (node->boundingRect().translated(node->scenePos()).intersects(rect))

      return false;

  }

  return true;

}

//------------------------------------------------------------------

QVector<schematicnode *=""> SchematicScene::getPlacedNode(SchematicNode *node) {</schematicnode>

  QRectF rect = node->boundingRect().translated(node->scenePos());

  QList<qgraphicsitem *=""> allItems = items();</qgraphicsitem>

  QVector<schematicnode *=""> nodes;</schematicnode>

  for (auto const item : allItems) {

    SchematicNode *placedNode = dynamic_cast<schematicnode *="">(item);</schematicnode>

    if (!placedNode || placedNode == node) continue;

    QRectF nodeRect =

        placedNode->boundingRect().translated(placedNode->scenePos());

    QRectF enlargedRect = rect.adjusted(-10, -10, 10, 10);

    if (enlargedRect.contains(nodeRect)) nodes.push_back(placedNode);

  }

  return nodes;

}

//==================================================================

//

// SchematicSceneViewer

//

//==================================================================

SchematicSceneViewer::SchematicSceneViewer(QWidget *parent)

    : QGraphicsView(parent)

    , m_buttonState(Qt::NoButton)

    , m_oldWinPos()

    , m_oldScenePos()

    , m_firstShowing(true) {

  setObjectName("SchematicSceneViewer");

  setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

  setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

  setDragMode(QGraphicsView::NoDrag);

  setTransformationAnchor(QGraphicsView::NoAnchor);

  setRenderHint(QPainter::SmoothPixmapTransform);

  setRenderHint(QPainter::TextAntialiasing);

  setRenderHint(QPainter::Antialiasing);

  setInteractive(true);

  setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);

  show();

}

//------------------------------------------------------------------

SchematicSceneViewer::~SchematicSceneViewer() {}

//------------------------------------------------------------------

/*! Reimplemets the QGraphicsView::mousePressEvent()

*/

void SchematicSceneViewer::mousePressEvent(QMouseEvent *me) {

  m_buttonState = me->button();

  m_oldWinPos   = me->pos();

  m_oldScenePos = mapToScene(m_oldWinPos);

  bool drawRect                       = true;

  QList<qgraphicsitem *=""> pointedItems = items(me->pos());</qgraphicsitem>

  int i;

  for (i = 0; i < pointedItems.size(); i++) {

    SchematicWindowEditor *editor =

        dynamic_cast<schematicwindoweditor *="">(pointedItems[i]);</schematicwindoweditor>

    if (!editor) {

      drawRect = false;

      break;

    }

  }

  if (m_buttonState == Qt::LeftButton && drawRect)

    setDragMode(QGraphicsView::RubberBandDrag);

  QGraphicsView::mousePressEvent(me);

}

//------------------------------------------------------------------

/*! Reimplemets the QGraphicsView::mouseMoveEvent()

*/

void SchematicSceneViewer::mouseMoveEvent(QMouseEvent *me) {

  QPoint currWinPos    = me->pos();

  QPointF currScenePos = mapToScene(currWinPos);

  if (m_buttonState == Qt::MidButton) {

    // Panning

    setInteractive(false);

    // I need to disable QGraphicsView event handling to avoid the generation of

    // 'virtual' mouseMoveEvent

    QPointF delta = currScenePos - m_oldScenePos;

    translate(delta.x(), delta.y());

    currScenePos = mapToScene(currWinPos);

    // translate has changed the matrix affecting the mapToScene() method. I

    // have to recompute currScenePos

    setInteractive(true);

  }

  m_oldWinPos   = currWinPos;

  m_oldScenePos = currScenePos;

  QGraphicsView::mouseMoveEvent(me);

}

//------------------------------------------------------------------

/*! Reimplemets the QGraphicsView::mouseReleaseEvent()

*/

void SchematicSceneViewer::mouseReleaseEvent(QMouseEvent *me) {

  m_buttonState = Qt::NoButton;

  QGraphicsView::mouseReleaseEvent(me);

  setDragMode(QGraphicsView::NoDrag);

  // update();

}

//------------------------------------------------------------------

void SchematicSceneViewer::keyPressEvent(QKeyEvent *ke) {

  ke->ignore();

  QGraphicsView::keyPressEvent(ke);

  if (!ke->isAccepted()) SchematicZoomer(this).exec(ke);

}

//------------------------------------------------------------------

/*! Reimplemets the QGraphicsView::wheelEvent()

*/

void SchematicSceneViewer::wheelEvent(QWheelEvent *me) {

  me->accept();

  double factor = exp(me->delta() * 0.001);

  changeScale(me->pos(), factor);

}

//------------------------------------------------------------------

void SchematicSceneViewer::zoomQt(bool zoomin, bool resetZoom) {

#if QT_VERSION >= 0x050000

  double scale2 = matrix().determinant();

#else

  double scale2 = matrix().det();

#endif

  // if the zoom scale is changed over 100% in FxSchematic, call updateScene

  bool beforeIsLarge = (scale2 >= 1.0);

  if (resetZoom ||

      ((scale2 < 100000 || !zoomin) && (scale2 > 0.001 * 0.05 || zoomin))) {

    double oldZoomScale = sqrt(scale2);

    double zoomScale    = resetZoom ? 1 : ImageUtils::getQuantizedZoomFactor(

                                           oldZoomScale, zoomin);

    QMatrix scale =

        QMatrix().scale(zoomScale / oldZoomScale, zoomScale / oldZoomScale);

    // See QGraphicsView::mapToScene()'s doc for details

    QRect rect(0, 0, width(), height());

    QRectF sceneCenterRect(

        mapToScene(QRect(rect.center(), QSize(2, 2))).boundingRect());

    setMatrix(scale, true);

    centerOn(sceneCenterRect.center());

#if QT_VERSION >= 0x050000

    bool afterIsLarge = (matrix().determinant() >= 1.0);

#else

    bool afterIsLarge  = (matrix().det() >= 1.0);

#endif

    if (beforeIsLarge != afterIsLarge) {

      FxSchematicScene *fxScene = qobject_cast<fxschematicscene *="">(scene());</fxschematicscene>

      if (fxScene) fxScene->updateScene();

    }

  }

}

//------------------------------------------------------------------

/*! The view is scaled around the point \b winPos by \b scaleFactor;

*/

void SchematicSceneViewer::changeScale(const QPoint &winPos,

                                       qreal scaleFactor) {

#if QT_VERSION >= 0x050000

  bool beforeIsLarge = (matrix().determinant() >= 1.0);

#else

  bool beforeIsLarge   = (matrix().det() >= 1.0);

#endif

  QPointF startScenePos = mapToScene(winPos);

  QMatrix scale         = QMatrix().scale(scaleFactor, scaleFactor);

  setMatrix(scale, true);

  QPointF endScenePos = mapToScene(winPos);

  QPointF delta       = endScenePos - startScenePos;

  translate(delta.x(), delta.y());

#if QT_VERSION >= 0x050000

  bool afterIsLarge = (matrix().determinant() >= 1.0);

#else

  bool afterIsLarge    = (matrix().det() >= 1.0);

#endif

  if (beforeIsLarge != afterIsLarge) {

    FxSchematicScene *fxScene = qobject_cast<fxschematicscene *="">(scene());</fxschematicscene>

    if (fxScene) fxScene->updateScene();

  }

}

//------------------------------------------------------------------

void SchematicSceneViewer::fitScene() {

  if (scene()) {

#if QT_VERSION >= 0x050000

    bool beforeIsLarge = (matrix().determinant() >= 1.0);

#else

    bool beforeIsLarge = (matrix().det() >= 1.0);

#endif

    QRectF rect = scene()->itemsBoundingRect();

    fitInView(rect, Qt::KeepAspectRatio);

#if QT_VERSION >= 0x050000

    bool afterIsLarge = (matrix().determinant() >= 1.0);

#else

    bool afterIsLarge  = (matrix().det() >= 1.0);

#endif

    if (beforeIsLarge != afterIsLarge) {

      FxSchematicScene *fxScene = qobject_cast<fxschematicscene *="">(scene());</fxschematicscene>

      if (fxScene) fxScene->updateScene();

    }

  }

}

//------------------------------------------------------------------

void SchematicSceneViewer::centerOnCurrent() {

  SchematicScene *schematicScene = dynamic_cast<schematicscene *="">(scene());</schematicscene>

  QGraphicsItem *node            = schematicScene->getCurrentNode();

  if (node) centerOn(node);

}

//------------------------------------------------------------------

void SchematicSceneViewer::reorderScene() {

  SchematicScene *schematicScene = dynamic_cast<schematicscene *="">(scene());</schematicscene>

  schematicScene->reorderScene();

}

//------------------------------------------------------------------

void SchematicSceneViewer::normalizeScene() {

#if QT_VERSION >= 0x050000

  bool beforeIsLarge = (matrix().determinant() >= 1.0);

#else

  bool beforeIsLarge   = (matrix().det() >= 1.0);

#endif

  // See QGraphicsView::mapToScene()'s doc for details

  QRect rect(0, 0, width(), height());

  QRectF sceneCenterRect(

      mapToScene(QRect(rect.center(), QSize(2, 2))).boundingRect());

  resetMatrix();

#if defined(MACOSX)

  scale(1.32, 1.32);

#endif

  centerOn(sceneCenterRect.center());

#if QT_VERSION >= 0x050000

  bool afterIsLarge = (matrix().determinant() >= 1.0);

#else

  bool afterIsLarge    = (matrix().det() >= 1.0);

#endif

  if (beforeIsLarge != afterIsLarge) {

    FxSchematicScene *fxScene = qobject_cast<fxschematicscene *="">(scene());</fxschematicscene>

    if (fxScene) fxScene->updateScene();

  }

}

//------------------------------------------------------------------

void SchematicSceneViewer::showEvent(QShowEvent *se) {

  QGraphicsView::showEvent(se);

  if (m_firstShowing) {

    m_firstShowing = false;

    QRectF rect    = scene()->itemsBoundingRect();

    resetMatrix();

    centerOn(rect.center());

  }

}

//==================================================================

//

// SchematicViewer

//

//==================================================================

SchematicViewer::SchematicViewer(QWidget *parent)

    : QWidget(parent)

    , m_fullSchematic(true)

    , m_maximizedNode(false)

    , m_sceneHandle(0) {

  m_viewer     = new SchematicSceneViewer(this);

  m_stageScene = new StageSchematicScene(this);

  m_fxScene    = new FxSchematicScene(this);

  m_commonToolbar = new QToolBar(m_viewer);

  m_stageToolbar  = new QToolBar(m_viewer);

  m_fxToolbar     = new QToolBar(m_viewer);

  m_swapToolbar   = new QToolBar(m_viewer);

  m_commonToolbar->setObjectName("ToolBarWithoutBorder");

  m_stageToolbar->setObjectName("ToolBarWithoutBorder");

  m_fxToolbar->setObjectName("ToolBarWithoutBorder");

  m_swapToolbar->setObjectName("ToolBarWithoutBorder");

  createToolbars();

  createActions();

  // layout

  QVBoxLayout *mainLayout = new QVBoxLayout();

  mainLayout->setMargin(1);

  mainLayout->setSpacing(0);

  {

    mainLayout->addWidget(m_viewer, 1);

    QFrame *bottomFrame = new QFrame(this);

    bottomFrame->setObjectName("SchematicBottomFrame");

    QHBoxLayout *horizontalLayout = new QHBoxLayout();

    horizontalLayout->setMargin(0);

    horizontalLayout->setSpacing(0);

    {

      horizontalLayout->addWidget(m_commonToolbar);

      horizontalLayout->addStretch();

      horizontalLayout->addWidget(m_fxToolbar);

      horizontalLayout->addWidget(m_stageToolbar);

      horizontalLayout->addWidget(m_swapToolbar);

    }

    bottomFrame->setLayout(horizontalLayout);

    mainLayout->addWidget(bottomFrame, 0);

  }

  setLayout(mainLayout);

  connect(m_fxScene, SIGNAL(showPreview(TFxP)), this,

          SIGNAL(showPreview(TFxP)));

  connect(m_fxScene, SIGNAL(doCollapse(const QList<tfxp> &)), this,</tfxp>

          SIGNAL(doCollapse(const QList<tfxp> &)));</tfxp>

  connect(m_stageScene, SIGNAL(doCollapse(QList<tstageobjectid>)), this,</tstageobjectid>

          SIGNAL(doCollapse(QList<tstageobjectid>)));</tstageobjectid>

  connect(m_fxScene, SIGNAL(doExplodeChild(const QList<tfxp> &)), this,</tfxp>

          SIGNAL(doExplodeChild(const QList<tfxp> &)));</tfxp>

  connect(m_stageScene, SIGNAL(doExplodeChild(QList<tstageobjectid>)), this,</tstageobjectid>

          SIGNAL(doExplodeChild(QList<tstageobjectid>)));</tstageobjectid>

  connect(m_stageScene, SIGNAL(editObject()), this, SIGNAL(editObject()));

  connect(m_fxScene, SIGNAL(editObject()), this, SIGNAL(editObject()));

  m_viewer->setScene(m_stageScene);

  m_fxToolbar->hide();

  setFocusProxy(m_viewer);

}

//------------------------------------------------------------------

SchematicViewer::~SchematicViewer() {}

//------------------------------------------------------------------

void SchematicViewer::setApplication(TApplication *app) {

  m_stageScene->setXsheetHandle(app->getCurrentXsheet());

  m_stageScene->setObjectHandle(app->getCurrentObject());

  m_stageScene->setFxHandle(app->getCurrentFx());

  m_stageScene->setColumnHandle(app->getCurrentColumn());

  m_stageScene->setSceneHandle(app->getCurrentScene());

  m_stageScene->setFrameHandle(app->getCurrentFrame());

  m_fxScene->setApplication(app);

}

//------------------------------------------------------------------

void SchematicViewer::updateSchematic() {

  m_stageScene->updateScene();

  m_fxScene->updateScene();

}

//------------------------------------------------------------------

void SchematicViewer::setSchematicScene(SchematicScene *scene) {

  if (scene) {

    m_viewer->setScene(scene);

    m_viewer->centerOn(scene->sceneRect().center());

  }

}

//------------------------------------------------------------------

void SchematicViewer::createToolbars() {

  // Initialize them

  m_stageToolbar->setMovable(false);

  m_stageToolbar->setIconSize(QSize(23, 17));

  m_stageToolbar->setLayoutDirection(Qt::RightToLeft);

  m_stageToolbar->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

  m_commonToolbar->setMovable(false);

  m_commonToolbar->setIconSize(QSize(23, 17));

  m_commonToolbar->setLayoutDirection(Qt::RightToLeft);

  m_commonToolbar->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

  m_fxToolbar->setMovable(false);

  m_fxToolbar->setIconSize(QSize(23, 17));

  m_fxToolbar->setLayoutDirection(Qt::RightToLeft);

  m_fxToolbar->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

  m_swapToolbar->setMovable(false);

  m_swapToolbar->setIconSize(QSize(23, 17));

  m_swapToolbar->setLayoutDirection(Qt::RightToLeft);

  m_swapToolbar->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

}

//------------------------------------------------------------------

void SchematicViewer::createActions() {

  // Create all actions

  QAction *addPegbar = 0, *addSpline = 0, *addCamera = 0, *insertFx = 0,

          *addOutputFx = 0, *switchPort = 0;

  {

    // Fit schematic

    QIcon fitSchematicIcon = createQIconOnOffPNG("fit", false);

    m_fitSchematic =

        new QAction(fitSchematicIcon, tr("&Fit to Window"), m_commonToolbar);

    connect(m_fitSchematic, SIGNAL(triggered()), m_viewer, SLOT(fitScene()));

    // Center On

    QIcon centerOnIcon = createQIconOnOffPNG("centerselection", false);

    m_centerOn =

        new QAction(centerOnIcon, tr("&Focus on Current"), m_commonToolbar);

    connect(m_centerOn, SIGNAL(triggered()), m_viewer, SLOT(centerOnCurrent()));

    // Reorder schematic

    QIcon reorderIcon = createQIconOnOffPNG("reorder", false);

    m_reorder = new QAction(reorderIcon, tr("&Reorder Nodes"), m_commonToolbar);

    connect(m_reorder, SIGNAL(triggered()), m_viewer, SLOT(reorderScene()));

    // Normalize schematic schematic

    QIcon normalizeIcon = createQIconOnOffPNG("resetsize", false);

    m_normalize =

        new QAction(normalizeIcon, tr("&Reset Size"), m_commonToolbar);

    connect(m_normalize, SIGNAL(triggered()), m_viewer, SLOT(normalizeScene()));

    QIcon nodeSizeIcon = createQIconOnOffPNG(

        m_maximizedNode ? "minimizenodes" : "maximizenodes", false);

    m_nodeSize =

        new QAction(nodeSizeIcon, m_maximizedNode ? tr("&Minimize Nodes")

                                                  : tr("&Maximize Nodes"),

                    m_commonToolbar);

    connect(m_nodeSize, SIGNAL(triggered()), this, SLOT(changeNodeSize()));

    if (m_fullSchematic) {

      // AddPegbar

      addPegbar           = new QAction(tr("&New Pegbar"), m_stageToolbar);

      QIcon addPegbarIcon = createQIconOnOffPNG("pegbar", false);

      addPegbar->setIcon(addPegbarIcon);

      connect(addPegbar, SIGNAL(triggered()), m_stageScene,

              SLOT(onPegbarAdded()));

      // AddCamera

      addCamera           = new QAction(tr("&New Camera"), m_stageToolbar);

      QIcon addCameraIcon = createQIconOnOffPNG("camera", false);

      addCamera->setIcon(addCameraIcon);

      connect(addCamera, SIGNAL(triggered()), m_stageScene,

              SLOT(onCameraAdded()));

      // AddSpline

      addSpline           = new QAction(tr("&New Motion Path"), m_stageToolbar);

      QIcon addSplineIcon = createQIconOnOffPNG("motionpath", false);

      addSpline->setIcon(addSplineIcon);

      connect(addSpline, SIGNAL(triggered()), m_stageScene,

              SLOT(onSplineAdded()));

      // Switch display of stage schematic's output port

      switchPort =

          new QAction(tr("&Swtich output port display mode"), m_stageToolbar);

      switchPort->setCheckable(true);

      switchPort->setChecked(m_stageScene->isShowLetterOnPortFlagEnabled());

      QIcon switchPortIcon = createQIconOnOffPNG("switchport");

      switchPort->setIcon(switchPortIcon);

      connect(switchPort, SIGNAL(toggled(bool)), m_stageScene,

              SLOT(onSwitchPortModeToggled(bool)));

      // InsertFx

      insertFx = CommandManager::instance()->getAction("MI_InsertFx");

      if (insertFx) {

        QIcon insertFxIcon = createQIconOnOffPNG("fx", false);

        insertFx->setIcon(insertFxIcon);

      }

      // AddOutputFx

      addOutputFx = CommandManager::instance()->getAction("MI_NewOutputFx");

      QIcon addOutputFxIcon = createQIconOnOffPNG("output", false);

      if (addOutputFx) addOutputFx->setIcon(addOutputFxIcon);

      // Swap fx/stage schematic

      QIcon changeSchematicIcon = createQIconOnOffPNG("swap", false);

      m_changeScene =

          CommandManager::instance()->getAction("A_FxSchematicToggle", true);

      if (m_changeScene) {

        m_changeScene->setIcon(changeSchematicIcon);

        connect(m_changeScene, SIGNAL(triggered()), this,

                SLOT(onSceneChanged()));

      } else

        m_changeScene = 0;

    }

  }

  // Add actions to toolbars (in reverse)

  m_commonToolbar->addSeparator();

  m_commonToolbar->addAction(m_nodeSize);

  m_commonToolbar->addAction(m_normalize);

  m_commonToolbar->addAction(m_reorder);

  m_commonToolbar->addAction(m_centerOn);

  m_commonToolbar->addAction(m_fitSchematic);

  if (m_fullSchematic) {

    m_stageToolbar->addSeparator();

    m_stageToolbar->addAction(switchPort);

    m_stageToolbar->addSeparator();

    m_stageToolbar->addAction(addSpline);

    m_stageToolbar->addAction(addCamera);

    m_stageToolbar->addAction(addPegbar);

    m_fxToolbar->addSeparator();

    m_fxToolbar->addAction(addOutputFx);

    m_fxToolbar->addAction(insertFx);

    if (m_changeScene) m_swapToolbar->addAction(m_changeScene);

  }

}

//------------------------------------------------------------------

void SchematicViewer::setStageSchematic() {

  if (m_viewer->scene() != m_stageScene) {

    m_viewer->setScene(m_stageScene);

    QRectF rect = m_stageScene->itemsBoundingRect();

    m_viewer->resetMatrix();

    m_viewer->centerOn(rect.center());

    m_fxToolbar->hide();

    m_stageToolbar->show();

    m_viewer->update();

  }

  parentWidget()->setWindowTitle(QObject::tr("Stage Schematic"));

}

//------------------------------------------------------------------

void SchematicViewer::setFxSchematic() {

  if (m_viewer->scene() != m_fxScene) {

    m_viewer->setScene(m_fxScene);

    QRectF rect = m_fxScene->itemsBoundingRect();

    m_viewer->resetMatrix();

    m_viewer->centerOn(rect.center());

    m_stageToolbar->hide();

    m_fxToolbar->show();

    // check if the fx scene was small scaled (icon view mode)

    if (!m_fxScene->isLargeScaled()) m_fxScene->updateScene();

    m_viewer->update();

  }

  parentWidget()->setWindowTitle(QObject::tr("FX Schematic"));

}

//------------------------------------------------------------------

void SchematicViewer::onSceneChanged() {

  if (!hasFocus()) return;

  QGraphicsScene *scene = m_viewer->scene();

  if (scene == m_fxScene)

    setStageSchematic();

  else if (scene == m_stageScene)

    setFxSchematic();

}

//------------------------------------------------------------------

void SchematicViewer::onSceneSwitched() {

  m_maximizedNode = m_fxScene->getXsheetHandle()

                        ->getXsheet()

                        ->getFxDag()

                        ->getDagGridDimension() == 0;

  QIcon nodeSizeIcon = createQIconOnOffPNG(

      m_maximizedNode ? "minimizenodes" : "maximizenodes", false);

  m_nodeSize->setIcon(nodeSizeIcon);

  QString label(m_maximizedNode ? tr("&Minimize Nodes")

                                : tr("&Maximize Nodes"));

  m_nodeSize->setText(label);

  // reset schematic

  m_viewer->resetMatrix();

  m_viewer->centerOn(m_viewer->scene()->itemsBoundingRect().center());

  if (m_viewer->scene() == m_fxScene && !m_fxScene->isLargeScaled())

    m_fxScene->updateScene();

}

//------------------------------------------------------------------

bool SchematicViewer::isStageSchematicViewed() {

  QGraphicsScene *scene = m_viewer->scene();

  return scene == m_stageScene;

}

//------------------------------------------------------------------

void SchematicViewer::setStageSchematicViewed(bool isStageSchematic) {

  if (!m_fullSchematic) isStageSchematic = true;

  if (isStageSchematic == isStageSchematicViewed()) return;

  if (isStageSchematic)

    setStageSchematic();

  else

    setFxSchematic();

}

//------------------------------------------------------------------

void SchematicViewer::updateScenes() {

  TStageObjectId id = m_stageScene->getCurrentObject();

  if (id.isColumn()) {

    m_stageScene->update();

    TXsheet *xsh = m_stageScene->getXsheetHandle()->getXsheet();

    if (!xsh) return;

    TXshColumn *column = xsh->getColumn(id.getIndex());

    if (!column) {

      m_fxScene->getFxHandle()->setFx(0, false);

      return;

    }

    TFx *fx = column->getFx();

    m_fxScene->getFxHandle()->setFx(fx, false);

    m_fxScene->update();

  }

}

//------------------------------------------------------------------

void SchematicViewer::changeNodeSize() {

  m_maximizedNode = !m_maximizedNode;

  // aggiono l'icona del pulsante;

  m_fxScene->resizeNodes(m_maximizedNode);

  m_stageScene->resizeNodes(m_maximizedNode);

  QIcon nodeSizeIcon = createQIconOnOffPNG(

      m_maximizedNode ? "minimizenodes" : "maximizenodes", false);

  m_nodeSize->setIcon(nodeSizeIcon);

  QString label(m_maximizedNode ? tr("&Minimize Nodes")

                                : tr("&Maximize Nodes"));

  m_nodeSize->setText(label);

}