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#include "toonzqt/functiontoolbar.h"
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// TnzQt includes
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#include "toonzqt/doublefield.h"
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#include "toonzqt/functionkeyframenavigator.h"
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#include "toonzqt/functionselection.h"
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#include "toonzqt/framenavigator.h"
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#include "toonzqt/gutil.h"
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#include "toonzqt/menubarcommand.h"
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// TnzLib includes
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#include "toonz/tframehandle.h"
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#include "toonz/doubleparamcmd.h"
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// Qt includes
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#include <qlabel></qlabel>
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#include <qapplication></qapplication>
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//=========================================================================
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/*
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   * two states: curve_defined / curve_not_defined
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   * three widgets: value_fld, frame_nav, keyframe_nav
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                    (if curve_not_defined only keyframe_nav is visible)
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   * user actions
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     - value_fld changed / keyframe_nav changed (key icon) => modify current
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   curve
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     - frame_nav changed / keyframe_nav changed (arrows) => modify the 'extern'
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   frame
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   * 'extern' events:
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     - 'extern' frame changed => update fields
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     - curve selected => update fields (and possibly change status)
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*/
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//=========================================================================
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FunctionToolbar::FunctionToolbar(QWidget *parent)
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    : DVGui::ToolBar(parent), m_frameHandle(0), m_curve(0), m_selection(0) {
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  setFixedHeight(28);
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  m_valueToolbar    = new DVGui::ToolBar();
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  m_keyframeToolbar = new DVGui::ToolBar();
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  // value field
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  m_valueToolbar->addWidget(new QLabel(tr("Value")));
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  m_valueFld = new DVGui::MeasuredDoubleLineEdit();
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  // frame navigator
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  m_frameNavigator = new FrameNavigator(this);
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  // keyframe navigator
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  m_keyframeNavigator          = new FunctionKeyframeNavigator(this);
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  QWidget *space               = new QWidget(this);
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  DVGui::ToolBar *spaceToolBar = new DVGui::ToolBar();
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  spaceToolBar->addWidget(space);
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  m_valueFld->setStyleSheet("height:14px;margin-right:5px;margin-top:2px;");
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  space->setMinimumHeight(22);
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  space->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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  QIcon toggleIcon      = createQIconOnOff("swap", false);
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  QAction *toggleAction = new QAction(tr("&Open Function Curve Editor"), this);
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  assert(toggleAction);
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  toggleAction->setIcon(toggleIcon);
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  //-----layout
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  m_valueFldAction          = addWidget(m_valueToolbar);
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  m_keyframeNavigatorAction = addWidget(m_keyframeToolbar);
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  m_valueToolbar->addWidget(m_valueFld);
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  m_valueToolbar->addSeparator();
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  m_keyframeToolbar->addWidget(m_keyframeNavigator);
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  m_keyframeToolbar->addSeparator();
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  addWidget(m_frameNavigator);
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  addSeparator();
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  addWidget(spaceToolBar);
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  addSeparator();
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  addAction(toggleAction);
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  bool ret = connect(m_valueFld, SIGNAL(valueChanged()), this,
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                     SLOT(onValueFieldChanged()));
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  ret = ret && connect(m_frameNavigator, SIGNAL(frameSwitched()), this,
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                       SLOT(onNavFrameSwitched()));
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  ret = ret && connect(toggleAction, SIGNAL(triggered()), this,
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                       SIGNAL(numericalColumnToggled()));
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  m_valueFldAction->setVisible(false);
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  m_keyframeNavigatorAction->setVisible(false);
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  assert(ret);
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}
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//-------------------------------------------------------------------
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FunctionToolbar::~FunctionToolbar() {
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  if (m_curve) {
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    m_curve->removeObserver(this);
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    m_curve->release();
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  }
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}
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//-------------------------------------------------------------------
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bool FunctionToolbar::anyWidgetHasFocus() {
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  return hasFocus() || m_valueToolbar->hasFocus() ||
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         m_keyframeToolbar->hasFocus() || m_valueFld->hasFocus() ||
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         m_frameNavigator->anyWidgetHasFocus() ||
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         m_keyframeNavigator->hasFocus();
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::setCurve(TDoubleParam *curve) {
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  if (curve == m_curve) return;
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  bool curveDefined = curve != 0;
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  m_valueFldAction->setVisible(curveDefined);
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  m_keyframeNavigatorAction->setVisible(curveDefined);
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  m_keyframeNavigator->setCurve(curve);
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  if (curve) {
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    curve->addObserver(this);
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    curve->addRef();
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  }
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  if (m_curve) {
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    m_curve->removeObserver(this);
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    m_curve->release();
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  }
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  m_curve = curve;
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  if (m_curve) {
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    m_valueFld->setMeasure(m_curve->getMeasureName());
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    setFrame(m_frameNavigator->getFrame());
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  } else {
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    m_valueFld->setMeasure("");
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    m_valueFld->setValue(0);
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  }
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::setFrame(double frame) {
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  m_frameNavigator->setFrame(tround(frame), false);
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  if (m_curve)
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    m_valueFld->setValue(m_curve->getValue(frame));
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  else
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    m_valueFld->setValue(0);
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::onValueFieldChanged() {
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  if (!m_curve) return;
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  int frame     = m_frameNavigator->getFrame();
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  double value  = m_valueFld->getValue();
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  double fValue = m_curve->getValue(frame);
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  if (value == fValue) return;
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  KeyframeSetter::setValue(m_curve, frame, value);
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::onFrameSwitched() { setFrame(m_frameHandle->getFrame()); }
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//-------------------------------------------------------------------
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void FunctionToolbar::onNavFrameSwitched() {
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  if (m_frameHandle) m_frameHandle->setFrame(m_frameNavigator->getFrame());
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::onSelectionChanged() {
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  if (m_selection) {
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    if (m_selection->getSelectedKeyframeCount() == 1) {
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      QPair<tdoubleparam *,="" int=""> k = m_selection->getSelectedKeyframe(0);</tdoubleparam>
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      if (k.first == m_curve) {
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        int frame = m_curve->keyframeIndexToFrame(k.second);
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        setFrame(frame);
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        return;
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      }
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    } else if (m_selection->getSelectedKeyframeCount() > 1) {
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      setFrame(m_frameHandle->getFrame());
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      m_valueFld->setText("");
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      return;
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    }
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  }
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  if (m_frameHandle && m_curve)
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    setFrame(m_frameHandle->getFrame());
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  else
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    m_valueFld->setText("");
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::setFrameHandle(TFrameHandle *frameHandle) {
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  if (m_frameHandle) m_frameHandle->disconnect(this);
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  m_frameHandle = frameHandle;
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  if (m_frameHandle)
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    connect(m_frameHandle, SIGNAL(frameSwitched()), this,
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            SLOT(onFrameSwitched()));
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  m_keyframeNavigator->setFrameHandle(frameHandle);
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::setSelection(FunctionSelection *selection) {
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  if (m_selection != selection) {
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    if (m_selection)
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      disconnect(m_selection, SIGNAL(selectionChanged()), this,
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                 SLOT(onSelectionChanged()));
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    m_selection = selection;
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    if (m_selection)
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      connect(m_selection, SIGNAL(selectionChanged()), this,
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              SLOT(onSelectionChanged()));
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  }
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}
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//-------------------------------------------------------------------
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void FunctionToolbar::onChange(const TParamChange &) {
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  m_keyframeNavigator->update();
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}