void SceneViewer::enterEvent(QEvent *) {
  if (m_isMouseEntered) return;

  m_isMouseEntered = true;

  TApp *app        = TApp::instance();
  modifiers        = 0;
  TTool *tool      = app->getCurrentTool()->getTool();
  TXshLevel *level = app->getCurrentLevel()->getLevel();
  if (level && level->getSimpleLevel())
    m_dpiScale =
        getCurrentDpiScale(level->getSimpleLevel(), tool->getCurrentFid());
  else
    m_dpiScale = TPointD(1, 1);

  if (m_freezedStatus != NO_FREEZED) return;

  invalidateToolStatus();
  if (tool && tool->isEnabled()) {
    tool->setViewer(this);
    tool->updateMatrix();
    tool->onEnter();
  }

  setFocus();
  updateGL();
}
void SceneViewer::keyReleaseEvent(QKeyEvent *event) {
  if (m_freezedStatus != NO_FREEZED) return;

  TTool *tool = TApp::instance()->getCurrentTool()->getTool();
  if (!tool || !tool->isEnabled()) return;
  tool->setViewer(this);

  int key = event->key();

  if (key == Qt::Key_Shift || key == Qt::Key_Control || key == Qt::Key_Alt ||
      key == Qt::Key_AltGr) {
    if (key == Qt::Key_Shift)
      modifiers &= ~Qt::ShiftModifier;
    else if (key == Qt::Key_Control)
      modifiers &= ~Qt::ControlModifier;
    else if (key == Qt::Key_Alt || key == Qt::Key_AltGr)
      modifiers &= ~Qt::AltModifier;

    // quando l'utente preme shift/ctrl ecc. alcuni tool (es. pinch) devono
    // cambiare subito la forma del cursore, senza aspettare il prossimo move
    TMouseEvent toonzEvent;
    initToonzEvent(toonzEvent, event);
    toonzEvent.m_pos =
        TPoint(m_lastMousePos.x(), height() - 1 - m_lastMousePos.y());

    TPointD pos = tool->getMatrix().inv() * winToWorld(m_lastMousePos);

    TObjectHandle *objHandle = TApp::instance()->getCurrentObject();
    if (tool->getToolType() & TTool::LevelTool && !objHandle->isSpline()) {
      pos.x /= m_dpiScale.x;
      pos.y /= m_dpiScale.y;
    }

    tool->mouseMove(pos, toonzEvent);
    setToolCursor(this, tool->getCursorId());
  }

  if (tool->getName() == T_Type)
    event->accept();
  else
    event->ignore();
}
void SceneViewer::keyPressEvent(QKeyEvent *event) {
  if (m_freezedStatus != NO_FREEZED) return;

  int key = event->key();

  if (changeFrameSkippingHolds(event)) {
    return;
  }
  if ((event->modifiers() & Qt::ShiftModifier) &&
      (key == Qt::Key_Down || key == Qt::Key_Up)) {
  }

  TTool *tool = TApp::instance()->getCurrentTool()->getTool();
  if (!tool) return;

  bool isTextToolActive = tool->getName() == T_Type && tool->isActive();

  if (!isTextToolActive && ViewerZoomer(this).exec(event)) return;

  if (!isTextToolActive && SceneViewerShortcutReceiver(this).exec(event))
    return;

  if (!tool->isEnabled()) return;

  tool->setViewer(this);

  // If this object is child of Viewer or ComboViewer
  // (m_isStyleShortcutSelective = true),
  // then consider about shortcut for the current style selection.
  if (m_isStyleShortcutSwitchable &&
      Preferences::instance()->isUseNumpadForSwitchingStylesEnabled() &&
      (!isTextToolActive) && (event->modifiers() == Qt::NoModifier ||
                              event->modifiers() == Qt::KeypadModifier) &&
      ((Qt::Key_0 <= key && key <= Qt::Key_9) || key == Qt::Key_Tab ||
       key == Qt::Key_Backtab)) {
    event->ignore();
    return;
  }

  if (key == Qt::Key_Shift)
    modifiers |= Qt::SHIFT;
  else if (key == Qt::Key_Control)
    modifiers |= Qt::CTRL;
  else if (key == Qt::Key_Alt || key == Qt::Key_AltGr)
    modifiers |= Qt::ALT;

  if (key == Qt::Key_Shift || key == Qt::Key_Control || key == Qt::Key_Alt ||
      key == Qt::Key_AltGr) {
    // quando l'utente preme shift/ctrl ecc. alcuni tool (es. pinch) devono
    // cambiare subito la forma del cursore, senza aspettare il prossimo move
    TMouseEvent toonzEvent;
    initToonzEvent(toonzEvent, event);
    toonzEvent.m_pos =
        TPoint(m_lastMousePos.x(), height() - 1 - m_lastMousePos.y());

    TPointD pos = tool->getMatrix().inv() * winToWorld(m_lastMousePos);

    TObjectHandle *objHandle = TApp::instance()->getCurrentObject();
    if (tool->getToolType() & TTool::LevelTool && !objHandle->isSpline()) {
      pos.x /= m_dpiScale.x;
      pos.y /= m_dpiScale.y;
    }

    tool->mouseMove(pos, toonzEvent);
    setToolCursor(this, tool->getCursorId());
  }

  bool shiftButton = QApplication::keyboardModifiers() == Qt::ShiftModifier;

  TUINT32 flags = 0;
  TPoint pos;
  if (key == Qt::Key_Shift)
    flags = TwConsts::TK_ShiftPressed;
  else if (key == Qt::Key_Control)
    flags = TwConsts::TK_CtrlPressed;
  else if (key == Qt::Key_Alt)
    flags = TwConsts::TK_AltPressed;
  else if (key == Qt::Key_CapsLock)
    flags = TwConsts::TK_CapsLock;
  else if (key == Qt::Key_Backspace)
    key = TwConsts::TK_Backspace;
  else if (key == Qt::Key_Return)
    key = TwConsts::TK_Return;
  else if (key == Qt::Key_Left && !shiftButton)
    key = TwConsts::TK_LeftArrow;
  else if (key == Qt::Key_Right && !shiftButton)
    key = TwConsts::TK_RightArrow;
  else if (key == Qt::Key_Up && !shiftButton)
    key = TwConsts::TK_UpArrow;
  else if (key == Qt::Key_Down && !shiftButton)
    key = TwConsts::TK_DownArrow;
  else if (key == Qt::Key_Left && shiftButton)
    key = TwConsts::TK_ShiftLeftArrow;
  else if (key == Qt::Key_Right && shiftButton)
    key = TwConsts::TK_ShiftRightArrow;
  else if (key == Qt::Key_Up && shiftButton)
    key = TwConsts::TK_ShiftUpArrow;
  else if (key == Qt::Key_Down && shiftButton)
    key = TwConsts::TK_ShiftDownArrow;
  else if (key == Qt::Key_Home)
    key = TwConsts::TK_Home;
  else if (key == Qt::Key_End)
    key = TwConsts::TK_End;
  else if (key == Qt::Key_PageUp)
    key = TwConsts::TK_PageUp;
  else if (key == Qt::Key_PageDown)
    key = TwConsts::TK_PageDown;
  else if (key == Qt::Key_Insert)
    key = TwConsts::TK_Insert;
  else if (key == Qt::Key_Delete)
    key = TwConsts::TK_Delete;
  else if (key == Qt::Key_Escape)
    key = TwConsts::TK_Esc;
  else if (key == Qt::Key_F1)
    key = TwConsts::TK_F1;
  else if (key == Qt::Key_F2)
    key = TwConsts::TK_F2;
  else if (key == Qt::Key_F3)
    key = TwConsts::TK_F3;
  else if (key == Qt::Key_F4)
    key = TwConsts::TK_F4;
  else if (key == Qt::Key_F5)
    key = TwConsts::TK_F5;
  else if (key == Qt::Key_F6)
    key = TwConsts::TK_F6;
  else if (key == Qt::Key_F7)
    key = TwConsts::TK_F7;
  else if (key == Qt::Key_F8)
    key = TwConsts::TK_F8;
  else if (key == Qt::Key_F9)
    key = TwConsts::TK_F9;
  else if (key == Qt::Key_F10)
    key = TwConsts::TK_F10;
  else if (key == Qt::Key_F11)
    key = TwConsts::TK_F11;
  else if (key == Qt::Key_F12)
    key = TwConsts::TK_F12;
  else if (key == Qt::Key_Menu || key == Qt::Key_Meta)
    return;

  bool ret = false;
  if (tool)  // && m_toolEnabled)
  {
    QString text = event->text();
    if ((event->modifiers() & Qt::ShiftModifier)) text.toUpper();
    std::wstring unicodeChar = text.toStdWString();
    ret = tool->keyDown(key, unicodeChar, flags, pos);  // per il textTool
    if (ret) {
      update();
      return;
    }
    ret = tool->keyDown(key, flags, pos);  // per gli altri tool
  }
  if (!ret) {
    TFrameHandle *fh = TApp::instance()->getCurrentFrame();

    if (key == TwConsts::TK_UpArrow)
      fh->prevFrame();
    else if (key == TwConsts::TK_DownArrow)
      fh->nextFrame();
    else if (key == TwConsts::TK_Home)
      fh->firstFrame();
    else if (key == TwConsts::TK_End)
      fh->lastFrame();
  }
  update();
  // TODO: devo accettare l'evento?
}
void SceneViewer::mouseReleaseEvent(QMouseEvent *event) {
  // evita i release ripetuti
  if (!m_buttonClicked) return;
  m_buttonClicked = false;

  TTool *tool = TApp::instance()->getCurrentTool()->getTool();
  if (!tool || !tool->isEnabled()) {
    if (!m_toolDisableReason.isEmpty() && m_mouseButton == Qt::LeftButton &&
        !m_editPreviewSubCamera)
      DVGui::warning(m_toolDisableReason);
  }

  if (m_freezedStatus != NO_FREEZED) return;

  if (m_mouseButton != event->button()) return;

  if (m_current3DDevice != NONE) {
    m_mouseButton = Qt::NoButton;
    m_tabletEvent = false;
    m_pressure    = 0;
    if (m_current3DDevice == SIDE_LEFT_3D)
      set3DLeftSideView();
    else if (m_current3DDevice == SIDE_RIGHT_3D)
      set3DRightSideView();
    else if (m_current3DDevice == TOP_3D)
      set3DTopView();
    return;
  }

  if (m_mouseButton == Qt::LeftButton && m_editPreviewSubCamera) {
    if (!PreviewSubCameraManager::instance()->mouseReleaseEvent(this, event))
      goto quit;
  }

  if (m_compareSettings.m_dragCompareX || m_compareSettings.m_dragCompareY) {
    m_compareSettings.m_dragCompareX = m_compareSettings.m_dragCompareY = false;
    goto quit;
  }

  m_pos = QPoint(0, 0);
  if (!tool || !tool->isEnabled()) goto quit;

  tool->setViewer(this);

  {
    TMouseEvent toonzEvent;
    initToonzEvent(toonzEvent, event, height(), m_pressure, m_tabletEvent,
                   false);
    TPointD pos = tool->getMatrix().inv() * winToWorld(event->pos());

    TObjectHandle *objHandle = TApp::instance()->getCurrentObject();
    if (tool->getToolType() & TTool::LevelTool && !objHandle->isSpline()) {
      pos.x /= m_dpiScale.x;
      pos.y /= m_dpiScale.y;
    }

    if (m_mouseButton == Qt::LeftButton) {
      tool->leftButtonUp(pos, toonzEvent);
      TApp::instance()->getCurrentTool()->setToolBusy(false);
    }
  }

quit:

  m_mouseButton = Qt::NoButton;
  m_tabletEvent = false;
  m_pressure    = 0;
}
void SceneViewer::mousePressEvent(QMouseEvent *event) {
  // evita i press ripetuti
  if (m_buttonClicked) return;
  m_buttonClicked = true;

  if (m_freezedStatus != NO_FREEZED) return;

  if (m_mouseButton != Qt::NoButton) return;

  m_pos         = event->pos();
  m_mouseButton = event->button();

  // when using tablet, avoid unexpected drawing behavior occurs when
  // middle-click
  Qt::MouseButtons mousebuttons;
  mousebuttons = event->buttons();
  if (m_tabletEvent && m_mouseButton == Qt::MidButton &&
      (mousebuttons | Qt::LeftButton))
    return;

  if (is3DView() && m_current3DDevice != NONE &&
      m_mouseButton == Qt::LeftButton)
    return;
  else if (m_mouseButton == Qt::LeftButton && m_editPreviewSubCamera) {
    if (!PreviewSubCameraManager::instance()->mousePressEvent(this, event))
      return;
  } else if (m_mouseButton == Qt::LeftButton && m_visualSettings.m_doCompare) {
    if (abs(m_pos.x() - width() * m_compareSettings.m_compareX) < 20) {
      m_compareSettings.m_dragCompareX = true;
      m_compareSettings.m_dragCompareY = false;
      m_compareSettings.m_compareY     = ImagePainter::DefaultCompareValue;
      update();
      m_tabletEvent = false;
      return;
    } else if (abs((height() - m_pos.y()) -
                   height() * m_compareSettings.m_compareY) < 20) {
      m_compareSettings.m_dragCompareY = true;
      m_compareSettings.m_dragCompareX = false;
      m_compareSettings.m_compareX     = ImagePainter::DefaultCompareValue;
      update();
      m_tabletEvent = false;
      return;
    } else
      m_compareSettings.m_dragCompareX = m_compareSettings.m_dragCompareY =
          false;
  }

  if (m_freezedStatus != NO_FREEZED) return;

  TTool *tool = TApp::instance()->getCurrentTool()->getTool();
  if (!tool || !tool->isEnabled()) {
    m_tabletEvent = false;
    return;
  }
  tool->setViewer(this);
  if (m_mouseButton == Qt::LeftButton && tool->preLeftButtonDown()) {
    tool = TApp::instance()->getCurrentTool()->getTool();
    if (!tool || !tool->isEnabled()) {
      m_tabletEvent = false;
      return;
    }
    tool->setViewer(this);
  }

  TMouseEvent toonzEvent;
  if (m_pressure > 0 && !m_tabletEvent) m_tabletEvent = true;

  if (TApp::instance()->isPenCloseToTablet()) m_tabletEvent = true;
  initToonzEvent(toonzEvent, event, height(), m_pressure, m_tabletEvent, true);
  // if(!m_tabletEvent) qDebug() << "-----------------MOUSE PRESS 'PURO'.
  // POSSIBILE EMBOLO";
  TPointD pos = tool->getMatrix().inv() * winToWorld(m_pos);

  TObjectHandle *objHandle = TApp::instance()->getCurrentObject();
  if (tool->getToolType() & TTool::LevelTool && !objHandle->isSpline()) {
    pos.x /= m_dpiScale.x;
    pos.y /= m_dpiScale.y;
  }
  if (m_mouseButton == Qt::LeftButton) {
    TApp::instance()->getCurrentTool()->setToolBusy(true);
    tool->leftButtonDown(pos, toonzEvent);
  }
  if (m_mouseButton == Qt::RightButton) tool->rightButtonDown(pos, toonzEvent);
}
void SceneViewer::mouseMoveEvent(QMouseEvent *event) {
  if (m_freezedStatus != NO_FREEZED) return;

  QPoint curPos  = event->pos();
  bool cursorSet = false;
  m_lastMousePos = curPos;

  if (m_editPreviewSubCamera) {
    if (!PreviewSubCameraManager::instance()->mouseMoveEvent(this, event))
      return;
  }

  // if the "compare with snapshot" mode is activated, change the mouse cursor
  // on the border handle
  if (m_visualSettings.m_doCompare) {
    if (abs(curPos.x() - width() * m_compareSettings.m_compareX) < 20) {
      cursorSet = true;
      setToolCursor(this, ToolCursor::ScaleHCursor);
    } else if (abs((height() - curPos.y()) -
                   height() * m_compareSettings.m_compareY) < 20) {
      cursorSet = true;
      setToolCursor(this, ToolCursor::ScaleVCursor);
    }
  }

  // control of the border handle when the "compare with snapshot" mode is
  // activated
  if (m_compareSettings.m_dragCompareX || m_compareSettings.m_dragCompareY) {
    if (m_compareSettings.m_dragCompareX)
      m_compareSettings.m_compareX +=
          ((double)(curPos.x() - m_pos.x())) / width();
    else if (m_compareSettings.m_dragCompareY)
      m_compareSettings.m_compareY -=
          ((double)(curPos.y() - m_pos.y())) / height();
    m_compareSettings.m_compareX =
        tcrop(m_compareSettings.m_compareX, 0.0, 1.0);
    m_compareSettings.m_compareY =
        tcrop(m_compareSettings.m_compareY, 0.0, 1.0);

    update();

    m_pos = curPos;
  } else if (m_mouseButton == Qt::NoButton || m_mouseButton == Qt::LeftButton) {
    if (is3DView() && m_current3DDevice != NONE &&
        m_mouseButton == Qt::LeftButton)
      return;
    else if (is3DView() && m_mouseButton == Qt::NoButton) {
      TRectD rect = TRectD(TPointD(m_topRasterPos.x, m_topRasterPos.y),
                           TDimensionD(20, 20));
      if (rect.contains(TPointD(curPos.x(), curPos.y())))
        m_current3DDevice = TOP_3D;
      else {
        rect = TRectD(TPointD(m_sideRasterPos.x, m_sideRasterPos.y),
                      TDimensionD(20, 20));
        if (rect.contains(TPointD(curPos.x(), curPos.y()))) {
          if (m_phi3D > 0)
            m_current3DDevice = SIDE_RIGHT_3D;
          else
            m_current3DDevice = SIDE_LEFT_3D;
        } else
          m_current3DDevice = NONE;
      }
      if (m_current3DDevice != NONE) {
        cursorSet = true;
        setToolCursor(this, ToolCursor::CURSOR_ARROW);
      }
    }

    // if the middle mouse button is pressed while dragging, then do panning
    Qt::MouseButtons mousebuttons;
    mousebuttons = event->buttons();
    if (mousebuttons & Qt::MidButton) {
      // panning
      QPoint p = curPos - m_pos;
      if (m_pos == QPoint(0, 0) && p.manhattanLength() > 300) return;
      panQt(curPos - m_pos);
      m_pos = curPos;
      return;
    }

    TTool *tool = TApp::instance()->getCurrentTool()->getTool();
    if (!tool || !tool->isEnabled()) {
      m_tabletEvent = false;
      return;
    }
    tool->setViewer(this);
    TMouseEvent toonzEvent;
    initToonzEvent(toonzEvent, event, height(), m_pressure, m_tabletEvent,
                   false);
    TPointD worldPos = winToWorld(curPos);
    TPointD pos      = tool->getMatrix().inv() * worldPos;

    if (m_locator) {
      m_locator->onChangeViewAff(worldPos);
    }

    TObjectHandle *objHandle = TApp::instance()->getCurrentObject();
    if (tool->getToolType() & TTool::LevelTool && !objHandle->isSpline()) {
      pos.x /= m_dpiScale.x;
      pos.y /= m_dpiScale.y;
    }

    // qDebug() << "mouseMoveEvent. "  << (m_tabletEvent?"tablet":"mouse")
    //         << " pressure=" << m_pressure << " mouseButton=" << m_mouseButton
    //         << " buttonClicked=" << m_buttonClicked;
    if ((m_tabletEvent && m_pressure > 0) || m_mouseButton == Qt::LeftButton) {
      // sometimes the mousePressedEvent is postponed to a wrong  mouse move
      // event!
      if (m_buttonClicked) tool->leftButtonDrag(pos, toonzEvent);
    } else if (m_pressure == 0) {
      tool->mouseMove(pos, toonzEvent);
      // m_tabletEvent=false;
    }
    if (!cursorSet) setToolCursor(this, tool->getCursorId());
    m_pos = curPos;
  } else if (m_mouseButton == Qt::MidButton) {
    if ((event->buttons() & Qt::MidButton) == 0)
      m_mouseButton = Qt::NoButton;
    else
      // panning
      panQt(curPos - m_pos);
    m_pos = curPos;

    return;
  }
}