#include "plastictool.h"

// TnzTools includes
#include "tw/keycodes.h" // Obsolete by now... still currently used though
#include "tooloptionscontrols.h"
#include "tools/toolcommandids.h"

// TnzQt includes
#include "toonzqt/selection.h"
#include "toonzqt/tselectionhandle.h"
#include "toonzqt/dvmimedata.h"
#include "toonzqt/dvdialog.h"
#include "toonzqt/selectioncommandids.h"

// TnzLib includes
#include "toonz/tframehandle.h"
#include "toonz/tcolumnhandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/tobjecthandle.h"
#include "toonz/tonionskinmaskhandle.h"
#include "toonz/tstageobject.h"
#include "toonz/doubleparamcmd.h"
#include "toonz/palettecontroller.h"
#include "toonz/txshsimplelevel.h"

// TnzExt includes
#include "ext/plasticskeleton.h"
#include "ext/plasticdeformerstorage.h"

// TnzCore includes
#include "tgl.h"
#include "tundo.h"
#include "tfunctorinvoker.h"

// Qt includes
#include <QApplication>
#include <QString>
#include <QToolbar>
#include <QPushButton>
#include <QLabel>
#include <QClipboard>

// tcg includes
#include "tcg/tcg_macros.h"
#include "tcg/tcg_point_ops.h"
#include "tcg/tcg_list.h"
#include "tcg/tcg_function_types.h"
#include "tcg/tcg_iterator_ops.h"

//****************************************************************************************
//    Local namespace
//****************************************************************************************

namespace
{

static const double l_dmax = (std::numeric_limits<double>::max)();

} // namespace

//****************************************************************************************
//    PlasticToolLocals namespace
//****************************************************************************************

using namespace PlasticToolLocals;

namespace PlasticToolLocals
{

PlasticTool l_plasticTool;
bool l_suspendParamsObservation = false;

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

TPointD projection(const PlasticSkeleton &skeleton, int e, const TPointD &pos)
{
	const PlasticSkeleton::edge_type &ed = skeleton.edge(e);

	const TPointD &p0 = skeleton.vertex(ed.vertex(0)).P();
	const TPointD &p1 = skeleton.vertex(ed.vertex(1)).P();

	return tcg::point_ops::projection(pos, p0, tcg::point_ops::direction(p0, p1));
}

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

double frame()
{
	return TTool::getApplication()->getCurrentFrame()->getFrame();
}

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

int row() { return int(frame()) + 1; }

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

int column()
{
	return TTool::getApplication()->getCurrentColumn()->getColumnIndex();
}

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

void setCell(int row, int col)
{
	TTool::Application *app = TTool::getApplication();
	app->getCurrentFrame()->setCurrentFrame(row);
	app->getCurrentColumn()->setColumnIndex(col);
}

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

TXshColumn *xshColumn()
{
	TXsheet *xsh = TTool::getApplication()->getCurrentXsheet()->getXsheet();
	return xsh->getColumn(column());
}

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

TStageObject *stageObject()
{
	TXsheet *xsh = TTool::getApplication()->getCurrentXsheet()->getXsheet();
	return xsh->getStageObject(TStageObjectId::ColumnId(column()));
}

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

const TXshCell &xshCell()
{
	TXsheet *xsh = TTool::getApplication()->getCurrentXsheet()->getXsheet();
	return xsh->getCell(frame(), column());
}

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

int skeletonId()
{
	TStageObject *obj = stageObject();
	const PlasticSkeletonDeformationP &def = obj->getPlasticSkeletonDeformation();

	return def ? def->skeletonId(obj->paramsTime(frame())) : 1; // 1 (not -1) is intended.
} // Means '' (empty string)

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

double sdFrame() { return stageObject()->paramsTime(frame()); }

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

void setKeyframe(TDoubleParamP &param, double frame)
{
	if (!param->isKeyframe(frame)) {
		KeyframeSetter setter(param.getPointer(), -1, false); // Not placing undos through this setter
		setter.createKeyframe(frame);
	}
}

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

void setKeyframe(SkVD *vd, double frame)
{
	// vd->setKeyframe(frame);                          // Nope. In fact...

	// Keyframe set is performed with a special tool that is NOT AVAILABLE in TnzExt
	// (thus, not available to m_sd). It deals with specifying the correct interpolation
	// type (by user preference, which is TnzLib stuff), etc...

	// Traverse vd's parameters. In case they don't have a keyframe at current frame, add one.
	for (int p = 0; p < SkVD::PARAMS_COUNT; ++p)
		setKeyframe(vd->m_params[p], frame);
}

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

void setKeyframe(const PlasticSkeletonDeformationP &sd, double frame)
{
	// NOTE: The skeleton ids parameter is NOT affected

	SkD::vd_iterator vdt, vdEnd;
	sd->vertexDeformations(vdt, vdEnd);

	for (; vdt != vdEnd; ++vdt)
		setKeyframe((*vdt).second, frame);
}

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

void invalidateXsheet()
{
	TTool::getApplication()->getCurrentXsheet()->notifyXsheetChanged();
	stageObject()->updateKeyframes();

	l_plasticTool.storeDeformation();
	l_plasticTool.invalidate();
}

} // namespace PlasticToolLocals

//****************************************************************************************
//    Mime  definitions
//****************************************************************************************

struct PlasticSkeletonPMime : public DvMimeData {
	PlasticSkeletonP m_skeleton;

public:
	PlasticSkeletonPMime(const PlasticSkeletonP &skeleton)
		: m_skeleton(skeleton) {}

	virtual DvMimeData *clone() const { return new PlasticSkeletonPMime(m_skeleton); }
	virtual void releaseData() { m_skeleton = PlasticSkeletonP(); }
};

struct SkDPMime : public DvMimeData {
	SkDP m_sd;

public:
	SkDPMime(const SkDP &sd) : m_sd(sd) {}

	virtual DvMimeData *clone() const { return new SkDPMime(m_sd); }
	virtual void releaseData() { m_sd = SkDP(); }
};

//****************************************************************************************
//    Undo  definitions
//****************************************************************************************

// NOTE: Some of the following UNDOs have complex and dynamic contents, and I don't want to
//       trace their size thoroughly. So, I'll follow this guideline: given the standard
//       100 MB undos pool, how many undos of one specific type I'd want the pool to be able
//       to store?

namespace
{

class SetVertexNameUndo : public TUndo
{
	int m_row, m_col; //!< Xsheet coordinates
	int m_v;		  //!< Changed vertex

public:
	mutable QString m_oldName, m_newName; //!< Vertex names
	mutable SkVD m_oldVd;				  //!< Old Vertex deformation (SHARE-OWNED, rather than CLONED)

public:
	SetVertexNameUndo(int v, const QString &newName)
		: m_row(::row()), m_col(::column()), m_v(v), m_newName(newName)
	{
		const PlasticSkeletonP &skeleton = l_plasticTool.skeleton();
		const PlasticSkeletonVertex &vx = skeleton->vertex(v);

		m_oldName = vx.name();
	}

	int getSize() const { return sizeof(*this); } // sizeof this is roughly ok

	void redo() const
	{
		PlasticTool::TemporaryActivation tempActivate(m_row, m_col);

		// Store the vertex deformation before it's released (possibly destroyed)
		{
			const SkDP &sd = l_plasticTool.deformation();
			TCG_ASSERT(sd, return );

			const SkVD *vd = sd->vertexDeformation(m_oldName);
			TCG_ASSERT(vd, return );

			m_oldVd = *vd;
		}

		if (m_v >= 0)
			l_plasticTool.setSkeletonSelection(m_v);

		l_plasticTool.setVertexName(m_newName);

		::invalidateXsheet();
	}

	void undo() const
	{
		PlasticTool::TemporaryActivation tempActivate(m_row, m_col);

		const SkDP &sd = l_plasticTool.deformation();
		TCG_ASSERT(sd, return );

		if (m_v >= 0)
			l_plasticTool.setSkeletonSelection(m_v);

		l_plasticTool.setVertexName(m_oldName);

		// Restore the vertex deformation.
		SkVD *vd = sd->vertexDeformation(m_oldName);
		assert(vd);

		*vd = m_oldVd;

		::invalidateXsheet();
	}
};

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

class PasteDeformationUndo : public TUndo
{
	int m_col;			   //!< Affected column
	SkDP m_oldSd, m_newSd; //!< The skeleton deformations

public:
	PasteDeformationUndo(const SkDP &newSd)
		: m_col(column()), m_oldSd(stageObject()->getPlasticSkeletonDeformation()), m_newSd(newSd) {}

	int getSize() const { return 1 << 20; }

	void redo() const
	{
		TTool::getApplication()->getCurrentColumn()->setColumnIndex(m_col);
		stageObject()->setPlasticSkeletonDeformation(m_newSd);
		::invalidateXsheet();
	}

	void undo() const
	{
		TTool::getApplication()->getCurrentColumn()->setColumnIndex(m_col);
		stageObject()->setPlasticSkeletonDeformation(m_oldSd);
		::invalidateXsheet();
	}
};

} // namespace

//****************************************************************************************
//    PlasticTool::TemporaryActivation  implementation
//****************************************************************************************

PlasticTool::TemporaryActivation::TemporaryActivation(int row, int col)
	: m_activate(!l_plasticTool.isActive())
{
	if (m_activate)
		l_plasticTool.onActivate();

	::setCell(row, col);
}

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

PlasticTool::TemporaryActivation::~TemporaryActivation()
{
	if (m_activate)
		l_plasticTool.onDeactivate();
}

//****************************************************************************************
//    PlasticToolOptionsBox::SkelIdComboBox  definition
//****************************************************************************************

class PlasticToolOptionsBox::SkelIdsComboBox : public QComboBox
{
public:
	SkelIdsComboBox(QWidget *parent = 0) : QComboBox(parent)
	{
		updateSkeletonsList();
	}

	void updateSkeletonsList();
	void updateCurrentSkeleton();
};

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

void PlasticToolOptionsBox::SkelIdsComboBox::updateSkeletonsList()
{
	clear();

	const SkDP &sd = l_plasticTool.deformation();
	if (!sd)
		return;

	QStringList skeletonsList;

	SkD::skelId_iterator st, sEnd;
	sd->skeletonIds(st, sEnd);

	for (; st != sEnd; ++st)
		skeletonsList.push_back(QString::number(*st));

	QComboBox::insertItems(0, skeletonsList);

	updateCurrentSkeleton();
}

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

void PlasticToolOptionsBox::SkelIdsComboBox::updateCurrentSkeleton()
{
	setCurrentIndex(findText(QString::number(::skeletonId())));
}

//****************************************************************************************
//    PlasticToolOptionsBox  implementation
//****************************************************************************************

PlasticToolOptionsBox::PlasticToolOptionsBox(QWidget *parent, TTool *tool, TPaletteHandle *pltHandle)
	: GenericToolOptionsBox(parent, tool, pltHandle, PlasticTool::MODES_COUNT), m_tool(tool), m_subToolbars(new GenericToolOptionsBox *[PlasticTool::MODES_COUNT])
//, m_subToolbarActions(new QAction*[PlasticTool::MODES_COUNT])
{
	struct locals {
		static inline QWidget *newSpace(QWidget *parent = 0)
		{
			QWidget *space = new QWidget(parent);
			space->setFixedWidth(TOOL_OPTIONS_LEFT_MARGIN);

			return space;
		}
	};

	// Create Mesh button
	QPushButton *meshifyButton = new QPushButton(tr("Create Mesh"));
	// Add skeleton id-related widgets
	QLabel *skelIdLabel = new QLabel(tr("Skeleton:"));
	m_skelIdComboBox = new SkelIdsComboBox;
	m_addSkelButton = new QPushButton("+");	// Connected in the show event
	m_removeSkelButton = new QPushButton("-"); // Connected in the show event
	// Add sub-options for each mode group
	for (int m = 0; m != PlasticTool::MODES_COUNT; ++m)
		m_subToolbars[m] = new GenericToolOptionsBox(0, tool, pltHandle, m);

	meshifyButton->setFixedHeight(20);
	QAction *meshifyAction = CommandManager::instance()->getAction("A_ToolOption_Meshify");
	meshifyButton->addAction(meshifyAction);

	skelIdLabel->setFixedHeight(20);
	m_skelIdComboBox->setFixedWidth(50);
	m_addSkelButton->setFixedSize(20, 20);
	m_removeSkelButton->setFixedSize(20, 20);
	for (int m = 0; m != PlasticTool::MODES_COUNT; ++m)
		m_subToolbars[m]->setContentsMargins(0, 0, 0, 0);

	/*- Layout -*/
	// Add created widgets to the toolbar (in reverse order since we're inserting at 0)
	m_layout->insertWidget(0, m_removeSkelButton);
	m_layout->insertWidget(0, m_addSkelButton);
	m_layout->insertWidget(0, m_skelIdComboBox);
	m_layout->insertWidget(0, skelIdLabel);
	m_layout->insertWidget(0, locals::newSpace(this));
	m_layout->insertWidget(0, meshifyButton);
	m_layout->insertWidget(0, locals::newSpace(this));

	for (int m = 0; m != PlasticTool::MODES_COUNT; ++m)
		m_layout->insertWidget(m_layout->count() - 1, m_subToolbars[m], 1);

	bool ret = true;
	ret = ret && connect(meshifyButton, SIGNAL(clicked()), meshifyAction, SLOT(trigger()));
	assert(ret);

	// Add Animation mode fields corresponding to vertex properties
	GenericToolOptionsBox *animateOptionsBox = m_subToolbars[PlasticTool::ANIMATE_IDX];

	// Adjust some specific controls first
	{
		ToolOptionTextField *minAngleField = static_cast<ToolOptionTextField *>(
			animateOptionsBox->control("minAngle"));
		assert(minAngleField);

		minAngleField->setFixedWidth(40);

		ToolOptionTextField *maxAngleField = static_cast<ToolOptionTextField *>(
			animateOptionsBox->control("maxAngle"));
		assert(maxAngleField);

		maxAngleField->setFixedWidth(40);
	}

	// Distance
	ToolOptionParamRelayField *distanceField = new ToolOptionParamRelayField(
		&l_plasticTool, &l_plasticTool.m_distanceRelay);
	distanceField->setGlobalKey(&l_plasticTool.m_globalKey, &l_plasticTool.m_relayGroup);

	QLabel *distanceLabel = new QLabel(tr("Distance"));
	distanceLabel->setFixedHeight(20);

	// Angle
	ToolOptionParamRelayField *angleField = new ToolOptionParamRelayField(
		&l_plasticTool, &l_plasticTool.m_angleRelay);
	angleField->setGlobalKey(&l_plasticTool.m_globalKey, &l_plasticTool.m_relayGroup);

	QLabel *angleLabel = new QLabel(tr("Angle"));
	angleLabel->setFixedHeight(20);

	// SO
	ToolOptionParamRelayField *soField = new ToolOptionParamRelayField(
		&l_plasticTool, &l_plasticTool.m_soRelay);
	soField->setGlobalKey(&l_plasticTool.m_globalKey, &l_plasticTool.m_relayGroup);

	QLabel *soLabel = new QLabel(tr("SO"));
	soLabel->setFixedHeight(20);

	QHBoxLayout *animateLayout = animateOptionsBox->hLayout();
	animateLayout->insertWidget(0, soField);
	animateLayout->insertWidget(0, soLabel);
	animateLayout->insertWidget(0, angleField);
	animateLayout->insertWidget(0, angleLabel);
	animateLayout->insertWidget(0, distanceField);
	animateLayout->insertWidget(0, distanceLabel);

	onPropertyChanged();
}

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

void PlasticToolOptionsBox::showEvent(QShowEvent *se)
{
	bool ret = true;

	ret = ret && connect(&l_plasticTool, SIGNAL(skelIdsListChanged()), SLOT(onSkelIdsListChanged()));
	ret = ret && connect(&l_plasticTool, SIGNAL(skelIdChanged()), SLOT(onSkelIdChanged()));
	ret = ret && connect(m_skelIdComboBox, SIGNAL(activated(int)), SLOT(onSkelIdEdited()));
	ret = ret && connect(m_addSkelButton, SIGNAL(released()), SLOT(onAddSkeleton()));
	ret = ret && connect(m_removeSkelButton, SIGNAL(released()), SLOT(onRemoveSkeleton()));

	assert(ret);

	m_skelIdComboBox->updateSkeletonsList();
}

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

void PlasticToolOptionsBox::hideEvent(QHideEvent *he)
{
	disconnect(&l_plasticTool, 0, this, 0);
	disconnect(m_skelIdComboBox, 0, this, 0);
	disconnect(m_addSkelButton, 0, this, 0);
	disconnect(m_removeSkelButton, 0, this, 0);
}

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

void PlasticToolOptionsBox::onPropertyChanged()
{
	// Fetch current mode index
	TPropertyGroup *pGroup = m_tool->getProperties(PlasticTool::MODES_COUNT);
	assert(pGroup);

	TEnumProperty *prop = dynamic_cast<TEnumProperty *>(pGroup->getProperty("mode"));
	assert(prop);

	int mode = prop->getIndex();

	// Show the specified mode options, hide all the others
	for (int m = 0; m != PlasticTool::MODES_COUNT; ++m)
		m_subToolbars[m]->setVisible(m == mode);
}

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

void PlasticToolOptionsBox::onSkelIdsListChanged()
{
	m_skelIdComboBox->updateSkeletonsList();
}

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

void PlasticToolOptionsBox::onSkelIdChanged()
{
	m_skelIdComboBox->updateCurrentSkeleton();
}

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

void PlasticToolOptionsBox::onSkelIdEdited()
{
	int skelId = m_skelIdComboBox->currentText().toInt();
	if (skelId == ::skeletonId())
		return;

	if (!l_plasticTool.deformation())
		return;

	l_plasticTool.editSkelId_undo(skelId);
}

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

void PlasticToolOptionsBox::onAddSkeleton()
{
	if (l_plasticTool.isEnabled())
		l_plasticTool.addSkeleton_undo(new PlasticSkeleton);
}

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

void PlasticToolOptionsBox::onRemoveSkeleton()
{
	if (l_plasticTool.isEnabled() && l_plasticTool.deformation())
		l_plasticTool.removeSkeleton_withKeyframes_undo(::skeletonId());
}

//****************************************************************************************
//    PlasticTool  implementation
//****************************************************************************************

PlasticTool::PlasticTool()
	: TTool(T_Plastic), m_skelId(-(std::numeric_limits<int>::max)()), m_propGroup(new TPropertyGroup[MODES_COUNT + 1]), m_mode("mode"), m_vertexName("vertexName", L""), m_interpolate("interpolate", false), m_snapToMesh("snapToMesh", false), m_thickness("Thickness", 1, 100, 5), m_rigidValue("rigidValue"), m_globalKey("globalKeyframe", true), m_keepDistance("keepDistance", true), m_minAngle("minAngle", L""), m_maxAngle("maxAngle", L""), m_distanceRelay("distanceRelay"), m_angleRelay("angleRelay"), m_soRelay("soRelay"), m_skelIdRelay("skelIdRelay"), m_pressedPos(TConsts::napd), m_dragged(false), m_svHigh(-1), m_seHigh(-1), m_mvHigh(-1), m_meHigh(-1), m_rigidityPainter(createRigidityPainter()), m_showSkeletonOS(true), m_recompileOnMouseRelease(false)
{
	// And now, a little trick about tool binding
	bind(TTool::AllImages);  // Attach the tool to all types :)
	bind(TTool::MeshLevels); // But disable it for all but meshes :0

	// This little trick is needed to associate the tool to common levels (the toolbar must appear), in
	// order to make them meshable.

	// Bind properties to the appropriate property group (needed by the automatic toolbar builder)
	m_propGroup[MODES_COUNT].bind(m_mode);
	m_propGroup[MODES_COUNT].bind(m_vertexName);

	m_propGroup[RIGIDITY_IDX].bind(m_thickness);
	m_propGroup[RIGIDITY_IDX].bind(m_rigidValue);

	m_propGroup[BUILD_IDX].bind(m_interpolate);
	m_propGroup[BUILD_IDX].bind(m_snapToMesh);

	m_propGroup[ANIMATE_IDX].bind(m_globalKey);
	m_propGroup[ANIMATE_IDX].bind(m_keepDistance);
	m_propGroup[ANIMATE_IDX].bind(m_minAngle);
	m_propGroup[ANIMATE_IDX].bind(m_maxAngle);

	m_relayGroup.bind(m_distanceRelay);
	m_relayGroup.bind(m_angleRelay);
	m_relayGroup.bind(m_soRelay);

	m_mode.setId("SkeletonMode");
	m_vertexName.setId("VertexName");
	m_interpolate.setId("Interpolate");
	m_snapToMesh.setId("SnapToMesh");
	m_thickness.setId("Thickness");
	m_rigidValue.setId("RigidValue");
	m_globalKey.setId("GlobalKey");
	m_keepDistance.setId("KeepDistance");
	m_minAngle.setId("MinAngle");
	m_maxAngle.setId("MaxAngle");
	m_distanceRelay.setId("DistanceRelay");
	m_angleRelay.setId("AngleRelay");
	m_soRelay.setId("SoRelay");
	m_skelIdRelay.setId("SkelIdRelay");

	// Attach to selections
	m_svSel.setView(this);
	m_mvSel.setView(this), m_meSel.setView(this);
}

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

PlasticTool::~PlasticTool()
{
	if (m_sd)
		m_sd->removeObserver(this);
}

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

TTool::ToolType PlasticTool::getToolType() const
{
	switch (m_mode.getIndex()) {
	case MESH_IDX:
	case RIGIDITY_IDX:
		return TTool::LevelWriteTool;

		CASE BUILD_IDX : case ANIMATE_IDX : return TTool::ColumnTool;
	}

	assert(false);
	return TTool::GenericTool;
}

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

void PlasticTool::updateTranslation()
{
	m_mode.setQStringName(tr("Mode:"));
	m_mode.deleteAllValues();
	m_mode.addValue(tr("Edit Mesh").toStdWString());
	m_mode.addValue(tr("Paint Rigid").toStdWString());
	m_mode.addValue(tr("Build Skeleton").toStdWString());
	m_mode.addValue(tr("Animate").toStdWString());
	m_mode.setIndex(BUILD_IDX);

	m_vertexName.setQStringName(tr("Vertex Name:"));
	m_interpolate.setQStringName(tr("Allow Stretching"));
	m_snapToMesh.setQStringName(tr("Snap To Mesh"));
	m_thickness.setQStringName(tr("Thickness"));

	m_rigidValue.setQStringName("");
	m_rigidValue.deleteAllValues();
	m_rigidValue.addValue(tr("Rigid").toStdWString());
	m_rigidValue.addValue(tr("Flex").toStdWString());

	m_globalKey.setQStringName(tr("Global Key"));
	m_keepDistance.setQStringName(tr("Keep Distance"));
	m_minAngle.setQStringName(tr("Angle Bounds"));
	m_maxAngle.setQStringName("");
}

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

ToolOptionsBox *PlasticTool::createOptionsBox()
{
	// Create the options box
	TPaletteHandle *currPalette = TTool::getApplication()->getPaletteController()->getCurrentLevelPalette();
	PlasticToolOptionsBox *optionsBox = new PlasticToolOptionsBox(0, this, currPalette);

	// Connect it to receive m_mode notifications
	m_mode.addListener(optionsBox);

	return optionsBox;
}

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

PlasticSkeletonP PlasticTool::skeleton() const
{
	return m_sd ? m_sd->skeleton(::sdFrame()) : PlasticSkeletonP();
}

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

PlasticSkeleton &PlasticTool::deformedSkeleton()
{
	typedef tcg::function<void (PlasticTool::*)(PlasticSkeleton &),
						  &PlasticTool::updateDeformedSkeleton> Func;

	return m_deformedSkeleton(tcg::bind1st(Func(), *this));
}

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

void PlasticTool::touchSkeleton()
{
	touchDeformation();

	int skelId = ::skeletonId();
	if (!m_sd->skeleton(skelId)) {
		m_sd->attach(skelId, new PlasticSkeleton);
		emit skelIdsListChanged();
	}
}

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

void PlasticTool::touchDeformation()
{
	if (m_sd)
		return;

	// Store a new deformation in the column's stage object
	stageObject()->setPlasticSkeletonDeformation(new PlasticSkeletonDeformation);
	storeDeformation(); // Builds the deformed skeleton too
}

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

void PlasticTool::storeDeformation()
{
	const SkDP &sd = stageObject()->getPlasticSkeletonDeformation();
	if (m_sd != sd) {
		clearSkeletonSelections();

		if (m_sd) {
			m_sd->removeObserver(this);
			m_skelIdRelay.setParam(TDoubleParamP());
		}

		// Store the deformation, retrieving it from current column stage object
		m_sd = sd;

		if (m_sd) {
			m_sd->addObserver(this);
			m_skelIdRelay.setParam(m_sd->skeletonIdsParam());
		}

		m_skelIdRelay.notifyListeners();
	}

	storeSkeletonId();
	if (m_mode.getIndex() == ANIMATE_IDX)
		m_deformedSkeleton.invalidate(); // Store the deformed skeleton too

	emit skelIdsListChanged();
}

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

void PlasticTool::storeSkeletonId()
{
	int skelId = m_sd ? m_sd->skeletonIdsParam()->getValue(::sdFrame()) : -(std::numeric_limits<int>::max)();
	if (m_skelId != skelId) {
		m_skelId = skelId;
		clearSkeletonSelections();

		emit skelIdChanged();
	}
}

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

void PlasticTool::updateDeformedSkeleton(PlasticSkeleton &deformedSkeleton)
{
	if (m_sd)
		m_sd->storeDeformedSkeleton(::skeletonId(), ::sdFrame(), deformedSkeleton);
	else
		deformedSkeleton.clear();
}

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

void PlasticTool::onFrameSwitched()
{
	storeSkeletonId();
	storeMeshImage();

	switch (m_mode.getIndex()) {
	case ANIMATE_IDX:
		m_deformedSkeleton.invalidate();
	}

	// Update the relays' current frame
	double frame = ::sdFrame();

	m_distanceRelay.frame() = frame;
	m_angleRelay.frame() = frame;
	m_soRelay.frame() = frame;
	m_skelIdRelay.frame() = frame;

	m_distanceRelay.notifyListeners();
	m_angleRelay.notifyListeners();
	m_soRelay.notifyListeners();
	m_skelIdRelay.notifyListeners();
}

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

void PlasticTool::onColumnSwitched()
{
	switch (m_mode.getIndex()) {
	case MESH_IDX:
	case BUILD_IDX:
	case RIGIDITY_IDX:
		m_pvs.m_showOriginalColumn = xshColumn();
	}

	storeDeformation();
	storeMeshImage();
}

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

void PlasticTool::onXsheetChanged()
{
	onColumnSwitched();
	TTool::updateEnabled(); // Current cell may no longer be a mesh one (or viceversa),
} // so tool enabled status must be updated.

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

void PlasticTool::onChange()
{
	// Since parameters are typically coupled, we could pass multiple, consecutive times in
	// this notification function. We have to employ counter-measures to prevent multiple
	// calls from affecting performance.

	static bool refresh = false; // Accessible from locals since static

	struct locals {
		struct RefreshFunctor : public TFunctorInvoker::BaseFunctor {
			void operator()()
			{
				refresh = false;
				l_plasticTool.storeSkeletonId(); // Calls ::sdFrame()

				// This is needed to repaint the xsheet (not automatic otherwise)
				TTool::getApplication()->getCurrentObject()->notifyObjectIdChanged(false);
			}
		};
	}; // locals

	// Using invalidate/update and delayed invocation to prevent multiple calls to ::sdFrame()
	m_deformedSkeleton.invalidate();

	if (!refresh) {
		refresh = true;
		QMetaObject::invokeMethod(TFunctorInvoker::instance(), "invoke", Qt::QueuedConnection,
								  Q_ARG(void *, new locals::RefreshFunctor));
	}

	// Passing through Qt's event system to compress repaints in a single one
	TTool::Viewer *viewer = getViewer();
	if (viewer)					 // This goes through paintEvent(),
		viewer->invalidateAll(); // \a unlike TTool::invalidate()
}

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

void PlasticTool::onChange(const TParamChange &pc)
{
	if (l_suspendParamsObservation)
		return;

	onChange();
}

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

void PlasticTool::onSetViewer()
{
	Viewer *viewer = getViewer();
	if (viewer) {
		PlasticVisualSettings &pvs = viewer->visualSettings().m_plasticVisualSettings;
		pvs = m_pvs;

		// Force options if needed
		if (m_mode.getIndex() == RIGIDITY_IDX)
			pvs.m_drawRigidity = true;
	}
}

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

void PlasticTool::onActivate()
{
	bool ret;
	ret = connect(TTool::m_application->getCurrentFrame(), SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched())), assert(ret);
	ret = connect(TTool::m_application->getCurrentColumn(), SIGNAL(columnIndexSwitched()), this, SLOT(onColumnSwitched())), assert(ret);
	ret = connect(TTool::m_application->getCurrentXsheet(), SIGNAL(xsheetChanged()), this, SLOT(onXsheetChanged())), assert(ret);
	ret = connect(TTool::m_application->getCurrentXsheet(), SIGNAL(xsheetSwitched()), this, SLOT(onXsheetChanged())), assert(ret);

	onSetViewer();
	onColumnSwitched();
	onFrameSwitched();

	setActive(true);
}

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

void PlasticTool::onDeactivate()
{
	setActive(false);

	bool ret;
	ret = disconnect(TTool::m_application->getCurrentFrame(), SIGNAL(frameSwitched()), this, SLOT(onFrameSwitched())), assert(ret);
	ret = disconnect(TTool::m_application->getCurrentColumn(), SIGNAL(columnIndexSwitched()), this, SLOT(onColumnSwitched())), assert(ret);
	ret = disconnect(TTool::m_application->getCurrentXsheet(), SIGNAL(xsheetChanged()), this, SLOT(onXsheetChanged())), assert(ret);
	ret = disconnect(TTool::m_application->getCurrentXsheet(), SIGNAL(xsheetSwitched()), this, SLOT(onXsheetChanged())), assert(ret);

	Viewer *viewer = getViewer();
	if (viewer)
		viewer->visualSettings().m_plasticVisualSettings = PlasticVisualSettings();

	m_sd = PlasticSkeletonDeformationP();
}

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

void PlasticTool::onEnter()
{
}

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

void PlasticTool::onLeave()
{
	// Clear visualization vars
	m_pos = TConsts::napd;
	m_svHigh = m_seHigh = -1;
	m_mvHigh = m_meHigh = MeshIndex();
}

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

void PlasticTool::onSelectionChanged()
{
	SkVD *vd = 0;
	if (m_sd && m_svSel.hasSingleObject()) {
		int skelId = ::skeletonId();

		const PlasticSkeleton::vertex_type &vx = m_sd->skeleton(skelId)->vertex(m_svSel);

		m_vertexName.setValue(vx.name().toStdWString());
		m_interpolate.setValue(vx.m_interpolate);

		m_minAngle.setValue((vx.m_minAngle == -l_dmax) ? L"" : QString::number(vx.m_minAngle).toStdWString());
		m_maxAngle.setValue((vx.m_maxAngle == l_dmax) ? L"" : QString::number(vx.m_maxAngle).toStdWString());

		vd = m_sd->vertexDeformation(skelId, m_svSel);
	} else {
		m_vertexName.setValue(L"");
		m_interpolate.setValue(false);

		m_minAngle.setValue(L"");
		m_maxAngle.setValue(L"");
	}

	// Attach or detach relays depending on selected vertex's parameters
	m_soRelay.setParam(vd ? vd->m_params[SkVD::SO] : TDoubleParamP());

	if (vd && m_svSel.hasSingleObject() && m_svSel.objects().front() > 0) {
		m_distanceRelay.setParam(vd->m_params[SkVD::DISTANCE]);
		m_angleRelay.setParam(vd->m_params[SkVD::ANGLE]);
	} else {
		m_distanceRelay.setParam(TDoubleParamP());
		m_angleRelay.setParam(TDoubleParamP());
	}

	m_vertexName.notifyListeners();
	m_interpolate.notifyListeners();
	m_minAngle.notifyListeners();
	m_maxAngle.notifyListeners();

	m_distanceRelay.notifyListeners();
	m_angleRelay.notifyListeners();
	m_soRelay.notifyListeners();
}

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

void PlasticTool::enableCommands()
{
	if (TSelection::getCurrent() == &m_svSel)
		m_svSel.enableCommand(this, MI_Clear, &PlasticTool::deleteSelectedVertex_undo);
	else if (TSelection::getCurrent() == &m_meSel) {
		m_meSel.enableCommand(this, MI_Clear, &PlasticTool::collapseEdge_mesh_undo);
		m_meSel.enableCommand(this, MI_Insert, &PlasticTool::splitEdge_mesh_undo);
	}
}

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

void PlasticTool::setSkeletonSelection(const PlasticVertexSelection &vSel)
{
	if (vSel.isEmpty()) {
		m_svSel.selectNone();
		m_svSel.makeNotCurrent();

		return;
	}

	assert(m_sd);

	m_svSel.skeletonId() = m_skelId;
	m_svSel.setObjects(vSel.objects());

	m_svSel.notifyView();
	m_svSel.makeCurrent();

	// Okay, the following is cheap - we have to update the Function Editor (specifically)
	// since current vertex is shown in a special color. We know that the same happens for
	// the current stage object, so... we'll attach there.
	TTool::getApplication()->getCurrentObject()->notifyObjectIdChanged(false); // Carry on, you've seen nothing ;)
}

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

void PlasticTool::toggleSkeletonSelection(const PlasticVertexSelection &addition)
{
	const std::vector<int> &storedIdxs = m_svSel.objects();
	const std::vector<int> &addedIdxs = addition.objects();

	// Build new selection
	std::vector<int> selectedIdxs;

	if (m_svSel.contains(addition)) {
		std::set_difference(
			storedIdxs.begin(), storedIdxs.end(),
			addedIdxs.begin(), addedIdxs.end(),
			std::back_inserter(selectedIdxs));
	} else {
		std::set_union(
			storedIdxs.begin(), storedIdxs.end(),
			addedIdxs.begin(), addedIdxs.end(),
			std::back_inserter(selectedIdxs));
	}

	setSkeletonSelection(selectedIdxs);
}

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

void PlasticTool::clearSkeletonSelections()
{
	m_svHigh = m_seHigh = -1;

	m_svSel.selectNone();
	m_svSel.makeNotCurrent();
}

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

PlasticVertexSelection PlasticTool::branchSelection(int vIdx) const
{
	struct locals {
		static void addBranch(const PlasticSkeleton &skeleton, int v, std::vector<int> &branch)
		{
			branch.push_back(v);

			const PlasticSkeletonVertex &vx = skeleton.vertex(v);

			PlasticSkeletonVertex::edges_const_iterator et, eEnd = vx.edgesEnd();
			for (et = vx.edgesBegin(); et != eEnd; ++et) {
				int child = skeleton.edge(*et).vertex(1);

				if (v != child)							// The edge to parent is in the list
					addBranch(skeleton, child, branch); // I wonder if it's ensured to be always at begin?
			}
		}
	};

	assert(skeleton());

	std::vector<int> selectedIdxs;
	locals::addBranch(*skeleton(), vIdx, selectedIdxs);

	return selectedIdxs;
}

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

void PlasticTool::copySkeleton()
{
	if (!m_sd)
		return;

	const PlasticSkeletonP &skel = m_sd->skeleton(::skeletonId());
	if (!skel)
		return;

	// Copy a CLONE of currently addressed skeleton in the app clipboard
	QMimeData *data = new PlasticSkeletonPMime(new PlasticSkeleton(*skel));
	QApplication::clipboard()->setMimeData(data, QClipboard::Clipboard);
}

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

void PlasticTool::pasteSkeleton_undo()
{
	const PlasticSkeletonPMime *data = dynamic_cast<const PlasticSkeletonPMime *>(
		QApplication::clipboard()->mimeData());
	if (!data)
		return;

	PlasticSkeletonP newSkeleton(new PlasticSkeleton(*data->m_skeleton));

	touchDeformation();
	assert(m_sd);

	int skelId = ::skeletonId();
	const PlasticSkeletonP &oldSkel = m_sd->skeleton(skelId);

	if (oldSkel && !oldSkel->empty()) {
		// In case there exists a not-empty skeleton, add a NEW skeleton
		addSkeleton_undo(newSkeleton);
	} else {
		TUndoManager *manager = TUndoManager::manager();
		manager->beginBlock();
		{
			removeSkeleton_undo(skelId); // No problem - it's eventually empty
			addSkeleton_undo(skelId, newSkeleton.getPointer());
		}
		manager->endBlock();
	}
}

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

void PlasticTool::copyDeformation()
{
	if (!m_sd)
		return;

	// Copy a reference to currently addressed skeleton in the app clipboard
	QMimeData *data = new SkDPMime(m_sd);
	QApplication::clipboard()->setMimeData(data, QClipboard::Clipboard);
}

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

void PlasticTool::pasteDeformation_undo()
{
	const SkDPMime *data = dynamic_cast<const SkDPMime *>(QApplication::clipboard()->mimeData());
	if (!data)
		return;

	// Given a skeleton, attempt to assign it to the current stage object
	TStageObject *obj = ::stageObject();
	assert(obj);

	const PlasticSkeletonDeformationP &oldSd = obj->getPlasticSkeletonDeformation();
	if (oldSd) {
		// A skeleton already exists. Ask the user if it has to be replaced.
		bool replace = DVGui::MsgBox(
						   tr("A group of skeletons already exists for current column. Replacing it will also substitute any existing vertex animation.\n\nDo you want to continue?"),
						   tr("Ok"), tr("Cancel")) == 1;

		if (!replace)
			return;
	}

	// Clone the whole skeleton deformation (skeleton itself included)
	SkDP newSd(new PlasticSkeletonDeformation(*data->m_sd));

	// Insert the undo and perform the op
	TUndoManager::manager()->add(new PasteDeformationUndo(newSd));

	obj->setPlasticSkeletonDeformation(newSd);
	::invalidateXsheet();
}

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

void PlasticTool::setKey()
{
	assert(m_svSel.hasSingleObject());

	SkVD *vd = m_sd->vertexDeformation(::skeletonId(), m_svSel);
	double frame = ::frame();

	if (vd->isFullKeyframe(frame))
		vd->deleteKeyframe(frame);
	else
		::setKeyframe(vd, frame);
}

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

void PlasticTool::setGlobalKey()
{
	struct locals {
		inline static bool isFullKeyframe(const SkDP &sd, double frame)
		{
			SkD::vd_iterator vdt, vdEnd;
			sd->vertexDeformations(vdt, vdEnd);

			for (; vdt != vdEnd; ++vdt)
				if (!(*vdt).second->isFullKeyframe(frame))
					return false;

			return true;
		}
	};

	double frame = ::frame();

	if (locals::isFullKeyframe(m_sd, frame))
		m_sd->deleteKeyframe(frame);
	else
		::setKeyframe(m_sd, frame);
}

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

void PlasticTool::setRestKey()
{
	assert(m_svSel.hasSingleObject());

	SkVD *vd = m_sd->vertexDeformation(::skeletonId(), m_svSel);
	double frame = ::frame();

	for (int p = 0; p != SkVD::PARAMS_COUNT; ++p)
		vd->m_params[p]->setValue(frame, vd->m_params[p]->getDefaultValue());
}

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

void PlasticTool::setGlobalRestKey()
{
	double frame = ::frame();

	SkD::vd_iterator vdt, vdEnd;
	m_sd->vertexDeformations(vdt, vdEnd);

	for (; vdt != vdEnd; ++vdt) {
		SkVD *vd = (*vdt).second;

		for (int p = 0; p != SkVD::PARAMS_COUNT; ++p)
			vd->m_params[p]->setValue(frame, vd->m_params[p]->getDefaultValue());
	}
}

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

void PlasticTool::setKey_undo()
{
	keyFunc_undo(&PlasticTool::setKey);
}

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

void PlasticTool::setGlobalKey_undo()
{
	keyFunc_undo(&PlasticTool::setGlobalKey);
}

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

void PlasticTool::setRestKey_undo()
{
	keyFunc_undo(&PlasticTool::setRestKey);
}

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

void PlasticTool::setGlobalRestKey_undo()
{
	keyFunc_undo(&PlasticTool::setGlobalRestKey);
}

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

void PlasticTool::setVertexName(QString &name)
{
	const PlasticSkeletonP &skeleton = this->skeleton();
	assert(skeleton && m_svSel.hasSingleObject() && m_svSel > 0);

	// Update the selected vertex's name
	while (!m_sd->skeleton(::skeletonId())->setVertexName(m_svSel, name))
		name += "_";

	m_vertexName.setValue(name.toStdWString());
	m_vertexName.notifyListeners(); // NOTE: This should NOT invoke this function recursively

	// Re-store the deformed skeleton. This is necessary since any follow-up vertex
	// manipulation must refer the correct vd name.
	m_deformedSkeleton.invalidate();

	PlasticDeformerStorage::instance()->invalidateSkeleton(
		m_sd.getPointer(), ::skeletonId(), PlasticDeformerStorage::NONE);
}

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

void PlasticTool::mouseMove(const TPointD &pos, const TMouseEvent &me)
{
	// Discriminate mode
	switch (m_mode.getIndex()) {
	case MESH_IDX:
		mouseMove_mesh(pos, me);

		CASE BUILD_IDX : mouseMove_build(pos, me);

		CASE RIGIDITY_IDX : mouseMove_rigidity(pos, me);

		CASE ANIMATE_IDX : mouseMove_animate(pos, me);
	}
}

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

void PlasticTool::leftButtonDown(const TPointD &pos, const TMouseEvent &me)
{
	switch (m_mode.getIndex()) {
	case MESH_IDX:
		leftButtonDown_mesh(pos, me);

		CASE BUILD_IDX : leftButtonDown_build(pos, me);

		CASE RIGIDITY_IDX : leftButtonDown_rigidity(pos, me);

		CASE ANIMATE_IDX : leftButtonDown_animate(pos, me);
	}
}

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

void PlasticTool::leftButtonDrag(const TPointD &pos, const TMouseEvent &me)
{
	// Track dragging status
	m_dragged = true;

	switch (m_mode.getIndex()) {
	case MESH_IDX:
		leftButtonDrag_mesh(pos, me);

		CASE BUILD_IDX : leftButtonDrag_build(pos, me);

		CASE RIGIDITY_IDX : leftButtonDrag_rigidity(pos, me);

		CASE ANIMATE_IDX : leftButtonDrag_animate(pos, me);
	}
}

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

void PlasticTool::leftButtonUp(const TPointD &pos, const TMouseEvent &me)
{
	switch (m_mode.getIndex()) {
	case MESH_IDX:
		leftButtonUp_mesh(pos, me);

		CASE BUILD_IDX : leftButtonUp_build(pos, me);

		CASE RIGIDITY_IDX : leftButtonUp_rigidity(pos, me);

		CASE ANIMATE_IDX : leftButtonUp_animate(pos, me);
	}

	m_pressedPos = TConsts::napd;
	m_pressedVxsPos.clear();
	m_dragged = false;
}

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

void PlasticTool::addContextMenuItems(QMenu *menu)
{
	bool ret = true;

	// Add global actions
	if (m_sd && m_sd->skeleton(::skeletonId())) {
		QAction *copySkeleton = menu->addAction(tr("Copy Skeleton"));
		ret = ret && connect(copySkeleton, SIGNAL(triggered()), &l_plasticTool, SLOT(copySkeleton()));
	}

	if (dynamic_cast<const PlasticSkeletonPMime *>(QApplication::clipboard()->mimeData())) {
		QAction *pasteSkeleton = menu->addAction(tr("Paste Skeleton"));
		ret = ret && connect(pasteSkeleton, SIGNAL(triggered()), &l_plasticTool, SLOT(pasteSkeleton_undo()));
	}

	menu->addSeparator(); // Separate actions type

	// Add editing actions
	switch (m_mode.getIndex()) {
	case MESH_IDX:
		addContextMenuActions_mesh(menu);

		CASE BUILD_IDX : addContextMenuActions_build(menu);

		CASE RIGIDITY_IDX : addContextMenuActions_rigidity(menu);

		CASE ANIMATE_IDX : addContextMenuActions_animate(menu);
	}

	// Add view actions
	QAction *showMesh = menu->addAction(tr("Show Mesh"));
	showMesh->setCheckable(true);
	showMesh->setChecked(m_pvs.m_drawMeshesWireframe);

	ret = ret && connect(showMesh, SIGNAL(triggered(bool)), &l_plasticTool, SLOT(onShowMeshToggled(bool)));

	QAction *showRigidity = menu->addAction(tr("Show Rigidity"));
	showRigidity->setCheckable(true);
	showRigidity->setChecked(m_pvs.m_drawRigidity);

	ret = ret && connect(showRigidity, SIGNAL(triggered(bool)), &l_plasticTool, SLOT(onShowRigidityToggled(bool)));

	QAction *showSO = menu->addAction(tr("Show SO"));
	showSO->setCheckable(true);
	showSO->setChecked(m_pvs.m_drawSO);

	ret = ret && connect(showSO, SIGNAL(triggered(bool)), &l_plasticTool, SLOT(onShowSOToggled(bool)));

	QAction *showSkeletonOS = menu->addAction(tr("Show Skeleton Onion Skin"));
	showSkeletonOS->setCheckable(true);
	showSkeletonOS->setChecked(m_showSkeletonOS);

	ret = ret && connect(showSkeletonOS, SIGNAL(triggered(bool)), &l_plasticTool, SLOT(onShowSkelOSToggled(bool)));

	assert(ret);

	menu->addSeparator(); // Separate from common view options
}

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

void PlasticTool::reset()
{
	// NOTE: This is an inherited virtual. Please leave it even if it's empty.
}

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

bool PlasticTool::onPropertyChanged(std::string propertyName)
{
	struct locals {
		static bool alreadyContainsVertexName(const PlasticSkeleton &skel, const QString &name)
		{
			tcg::list<PlasticSkeletonVertex>::const_iterator vt, vEnd(skel.vertices().end());
			for (vt = skel.vertices().begin(); vt != vEnd; ++vt)
				if (vt->name() == name)
					return true;
			return false;
		}

		static int vdCount(const SkDP &sd, const QString &name)
		{
			SkD::vx_iterator vxBegin, vxEnd;
			sd->vdSkeletonVertices(name, vxBegin, vxEnd);

			return std::distance(vxBegin, vxEnd);
		}
	}; // locals

	if (propertyName == "mode") {
		switch (m_mode.getIndex()) {
		case MESH_IDX:
		case BUILD_IDX:
		case RIGIDITY_IDX:
			m_pvs.m_showOriginalColumn = xshColumn();

			CASE ANIMATE_IDX:
			{
				m_pvs.m_showOriginalColumn = 0;

				if (m_svSel.objects().size() > 1)
					setSkeletonSelection(-1);

				storeDeformation(); // Rebuild deformed skeleton
			}
		};

		m_mode.notifyListeners(); // You thought that was automatic, eh? BTW, this means
								  // we're requesting toolbars to update options visibility

		onSetViewer(); // Store m_pvs in the viewer's visual settings
		invalidate();
	} else if (propertyName == "vertexName") {
		if (m_sd && m_svSel >= 0) {
			// Update the selected vertex's name
			QString newName(QString::fromStdWString(m_vertexName.getValue()));

			const PlasticSkeletonP skeleton = this->skeleton();
			assert(skeleton);

			const QString &oldName = skeleton->vertex(m_svSel).name();

			bool doRename = true;
			if (oldName != newName &&
				!locals::alreadyContainsVertexName(*skeleton, newName) &&
				m_sd->vertexDeformation(newName) &&
				locals::vdCount(m_sd, oldName) == 1)
				doRename = (DVGui::MsgBox(tr("The previous vertex name will be discarded, and all associated keys will be lost.\n\nDo you want to proceed?"),
										  QObject::tr("Ok"), QObject::tr("Cancel")) == 1);

			if (doRename) {
				TUndo *undo = new SetVertexNameUndo(m_svSel, newName);
				TUndoManager::manager()->add(undo);

				undo->redo();
			} else {
				m_vertexName.setValue(oldName.toStdWString());
				m_vertexName.notifyListeners();
			}
		}
	} else if (propertyName == "interpolate") {
		if (m_sd && m_svSel >= 0) {
			// Set interpolation property to the associated skeleton vertex
			int skelId = ::skeletonId();

			m_sd->skeleton(skelId)->vertex(m_svSel).m_interpolate =
				m_interpolate.getValue();

			m_interpolate.notifyListeners(); // NOTE: This should NOT invoke this function recursively

			PlasticDeformerStorage::instance()->invalidateSkeleton(
				m_sd.getPointer(), skelId, PlasticDeformerStorage::ALL);
		}
	} else if (propertyName == "minAngle") {
		if (m_sd && m_svSel >= 0) {
			// Set maxAngle property to the associated skeleton vertex
			int skelId = ::skeletonId();

			bool ok;
			double value = QString::fromStdWString(m_minAngle.getValue()).toDouble(&ok);

			if (!ok)
				value = -l_dmax, m_minAngle.setValue(L"");

			m_sd->skeleton(skelId)->vertex(m_svSel).m_minAngle = value;
			if (m_mode.getIndex() == ANIMATE_IDX)
				deformedSkeleton().vertex(m_svSel).m_minAngle = value;

			m_minAngle.notifyListeners(); // NOTE: This should NOT invoke this function recursively
		}
	} else if (propertyName == "maxAngle") {
		if (m_sd && m_svSel >= 0) {
			// Set maxAngle property to the associated skeleton vertex
			int skelId = ::skeletonId();

			bool ok;
			double value = QString::fromStdWString(m_maxAngle.getValue()).toDouble(&ok);

			if (!ok)
				value = l_dmax, m_maxAngle.setValue(L"");

			m_sd->skeleton(skelId)->vertex(m_svSel).m_maxAngle = value;
			if (m_mode.getIndex() == ANIMATE_IDX)
				deformedSkeleton().vertex(m_svSel).m_maxAngle = value;

			m_maxAngle.notifyListeners(); // NOTE: This should NOT invoke this function recursively
		}
	}

	return true;
}

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

void PlasticTool::onShowMeshToggled(bool on)
{
	m_pvs.m_drawMeshesWireframe = on;
	invalidate();
}

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

void PlasticTool::onShowSOToggled(bool on)
{
	m_pvs.m_drawSO = on;
	invalidate();
}

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

void PlasticTool::onShowRigidityToggled(bool on)
{
	m_pvs.m_drawRigidity = on;
	invalidate();
}

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

void PlasticTool::onShowSkelOSToggled(bool on)
{
	m_showSkeletonOS = on;
	invalidate();
}

//****************************************************************************************
//    Drawing functions
//****************************************************************************************

namespace PlasticToolLocals
{

void drawSquare(const TPointD &pos, double radius)
{
	glBegin(GL_LINE_LOOP);
	glVertex2d(pos.x - radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y + radius);
	glVertex2d(pos.x - radius, pos.y + radius);
	glEnd();
}

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

void drawFullSquare(const TPointD &pos, double radius)
{
	glBegin(GL_QUADS);
	glVertex2d(pos.x - radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y + radius);
	glVertex2d(pos.x - radius, pos.y + radius);
	glEnd();
}

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

void drawFilledSquare(const TPointD &pos, double radius)
{
	glBegin(GL_QUADS);
	glVertex2d(pos.x - radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y - radius);
	glVertex2d(pos.x + radius, pos.y + radius);
	glVertex2d(pos.x - radius, pos.y + radius);
	glEnd();
}

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

void drawHandle(const TPointD &pos, double radius, const TPixel32 &color)
{
	glColor4ub(0, 0, 0, color.m); // Black border
	glLineWidth(4.0f);
	drawSquare(pos, radius);

	glColor4ub(color.r, color.g, color.b, color.m);
	glLineWidth(2.0f);
	drawSquare(pos, radius);
}

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

void drawFilledHandle(const TPointD &pos, double radius, double pixelSize, const TPixel32 &color)
{
	glColor4ub(0, 0, 0, color.m);
	drawFilledSquare(pos, radius + pixelSize);

	glColor4ub(color.r, color.g, color.b, color.m);
	drawFilledSquare(pos, radius);
}

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

void drawText(const TPointD &pos, const QString &text, double fontScale)
{
	// Get the world-to-window affine
	double matrix[16];

	glGetDoublev(GL_MODELVIEW_MATRIX, matrix);
	TAffine worldToWindowAff(
		matrix[0], matrix[4], matrix[12],
		matrix[1], matrix[5], matrix[13]);

	// Push the window reference
	glPushMatrix();
	glLoadIdentity();
	glScaled(fontScale, fontScale, 1.0);

	tglDrawText(TScale(1.0 / fontScale) * worldToWindowAff * pos, text.toStdWString());

	// Bottom-left fixed text version

	// double origin = 10.0 / fontScale
	// tglDrawText(TPointD(origin, origin), text.toStdWString());

	glPopMatrix();
}

} // namespace PlasticToolLocals

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

void PlasticTool::drawHighlights(const SkDP &sd, const PlasticSkeleton *skeleton, double pixelSize)
{
	glColor3f(1.0f, 0.0f, 0.0f); // Red
	glLineWidth(1.0f);

	// Vertex highlights
	if (m_svHigh >= 0) {
		double handleRadius = HIGHLIGHTED_HANDLE_SIZE * pixelSize;

		const PlasticSkeleton::vertex_type &vx = skeleton->vertex(m_svHigh);

		int hookNumber = sd->hookNumber(vx.name());
		assert(hookNumber >= 0);

		{
			glPushAttrib(GL_LINE_BIT);

			glEnable(GL_LINE_STIPPLE);
			glLineStipple(1, 0xCCCC);

			drawSquare(vx.P(), handleRadius);

			glPopAttrib();
		}

		drawText(vx.P() + TPointD(2.0 * handleRadius, 2.0 * handleRadius),
				 QString("(%1) ").arg(hookNumber) + vx.name(), 1.7);
	} else if (m_seHigh >= 0) {
		// Draw a handle at the projection of current mouse position towards the highlighted edge
		double handleRadius = HANDLE_SIZE * pixelSize;
		drawSquare(projection(*skeleton, m_seHigh, m_pos), handleRadius);
	}
}

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

void PlasticTool::drawSelections(const SkDP &sd, const PlasticSkeleton &skeleton, double pixelSize)
{
	glColor3f(1.0f, 0.0f, 0.0f); // Red
	glLineWidth(1.0f);

	double handleRadius = SELECTED_HANDLE_SIZE * pixelSize;

	if (!m_svSel.isEmpty()) {
		typedef PlasticVertexSelection::objects_container objects_container;
		const objects_container &vIdxs = m_svSel.objects();

		// Draw a handle square for each selected vertex
		objects_container::const_iterator vst, vsEnd = vIdxs.end();
		for (vst = vIdxs.begin(); vst != vsEnd; ++vst)
			drawSquare(skeleton.vertex(*vst).P(), handleRadius);

		// Draw vertex descriptions (only in the single selection case - to avoid text pollution)
		if (vIdxs.size() == 1) {
			const PlasticSkeleton::vertex_type &vx = skeleton.vertex(m_svSel);

			int hookNumber = sd->hookNumber(vx.name());
			assert(hookNumber >= 0);

			drawText(vx.P() + TPointD(2.0 * handleRadius, 2.0 * handleRadius),
					 QString("(%1) ").arg(hookNumber) + vx.name(), 1.7);
		}
	}
}

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

void PlasticTool::drawSkeleton(const PlasticSkeleton &skel, double pixelSize, UCHAR alpha)
{
	struct locals {
		inline static void drawLine(const TPointD &p0, const TPointD &p1)
		{
			glVertex2d(p0.x, p0.y);
			glVertex2d(p1.x, p1.y);
		}
	}; // locals

	const tcg::list<PlasticSkeleton::vertex_type> &vertices = skel.vertices();
	if (vertices.size() > 0) {
		// Draw edges
		{
			const tcg::list<PlasticSkeleton::edge_type> &edges = skel.edges();

			tcg::list<PlasticSkeleton::edge_type>::const_iterator et, eEnd(edges.end());

			glColor4ub(0, 0, 0, alpha);
			glLineWidth(4.0f); // Black border

			glBegin(GL_LINES);
			{
				for (et = edges.begin(); et != eEnd; ++et)
					locals::drawLine(skel.vertex(et->vertex(0)).P(), skel.vertex(et->vertex(1)).P());
			}
			glEnd();

			glColor4ub(250, 184, 70, alpha);
			glLineWidth(2.0f); // Yellow/Orange-ish line center

			glBegin(GL_LINES);
			{
				for (et = edges.begin(); et != eEnd; ++et)
					locals::drawLine(skel.vertex(et->vertex(0)).P(), skel.vertex(et->vertex(1)).P());
			}
			glEnd();
		}

		// Draw vertices
		{
			const TPixel32 magenta(255, 0, 255, alpha);
			const TPixel32 yellow(255, 255, 0, alpha);

			double handleRadius = HANDLE_SIZE * pixelSize;
			float intHandleThick = 2.0f, extHandleThick = 4.0f;

			// Draw root
			drawFilledHandle(vertices.begin()->P(), handleRadius, pixelSize, magenta);

			// Draw remaining vertices
			tcg::list<PlasticSkeleton::vertex_type>::const_iterator vt(vertices.begin()), vEnd(vertices.end());
			if (vt != vEnd) {
				for (vt = ++vertices.begin(); vt != vEnd; ++vt)
					drawHandle(vt->P(), handleRadius, vt->m_interpolate ? magenta : yellow);
			}
		}
	}
}

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

void PlasticTool::drawOnionSkinSkeletons_build(double pixelSize)
{
	if (!(m_showSkeletonOS && m_sd))
		return;

	const OnionSkinMask &os = TTool::getApplication()->getCurrentOnionSkin()->getOnionSkinMask();

	std::vector<int> osRows;
	int currentRow = ::row();

	os.getAll(currentRow, osRows);

	TStageObject *obj = ::stageObject();

	// Sieve osRows' associated skeleton ids first
	std::map<int, UCHAR> skelAlphas;

	int r, rCount = int(osRows.size());
	for (r = 0; r != rCount; ++r) {
		assert(osRows[r] != currentRow);

		double sdFrame = obj->paramsTime(double(osRows[r] - 1));
		int skelId = m_sd->skeletonId(sdFrame);

		UCHAR &skelAlpha = skelAlphas[skelId];

		UCHAR alpha = 255 - UCHAR(255.0 * OnionSkinMask::getOnionSkinFade(osRows[r] - currentRow));
		skelAlpha = tmax(skelAlpha, alpha);
	}

	std::map<int, UCHAR>::iterator st, sEnd(skelAlphas.end());
	for (st = skelAlphas.begin(); st != sEnd; ++st) {
		const PlasticSkeletonP &skel = m_sd->skeleton(st->first);
		drawSkeleton(*skel, pixelSize, st->second);
	}
}

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

void PlasticTool::drawOnionSkinSkeletons_animate(double pixelSize)
{
	if (!(m_showSkeletonOS && m_sd))
		return;

	const OnionSkinMask &os = TTool::getApplication()->getCurrentOnionSkin()->getOnionSkinMask();

	std::vector<int> osRows;
	int currentRow = ::row();

	os.getAll(currentRow, osRows);

	TStageObject *obj = ::stageObject();

	int r, rCount = int(osRows.size());
	for (r = 0; r != rCount; ++r) {
		assert(osRows[r] != currentRow);

		double sdFrame = obj->paramsTime(double(osRows[r] - 1));

		PlasticSkeleton skel;
		m_sd->storeDeformedSkeleton(m_sd->skeletonId(sdFrame), sdFrame, skel);

		UCHAR alpha = 255 - 255.0 * OnionSkinMask::getOnionSkinFade(abs(osRows[r] - currentRow));
		drawSkeleton(skel, pixelSize, alpha);
	}
}

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

void PlasticTool::drawAngleLimits(const SkDP &sd, int skelId, int v, double pixelSize)
{
	struct {
		PlasticTool *m_this;

		void drawAnnulusArc(const TPointD &center, double angleStart, double angleEnd,
							double radiusA, double radiusB, double pixelSize)
		{
			double angleDelta = acos(1.0 - pixelSize / tmax(radiusA, radiusB)) *
								((angleStart <= angleEnd) ? 1.0 : -1.0);

			int a, aCount = tcg::numeric_ops::grow(fabs((angleEnd - angleStart) / angleDelta));

			glBegin(GL_QUAD_STRIP);
			{
				for (a = 0; a != aCount; ++a) {
					double angle = angleStart + a * angleDelta;
					TPointD direction(cos(angle), sin(angle));

					tglVertex(center + radiusA * direction);
					tglVertex(center + radiusB * direction);
				}

				TPointD direction(cos(angleEnd), sin(angleEnd));

				tglVertex(center + radiusA * direction);
				tglVertex(center + radiusB * direction);
			}
			glEnd();
		}

		void drawLimit(const SkDP &sd, int skelId, int v,
					   double angleLimit, double pixelSize)
		{
			const PlasticSkeleton &skel = *sd->skeleton(skelId);
			const PlasticSkeleton &defSkel = m_this->deformedSkeleton();

			const PlasticSkeletonVertex &vx = skel.vertex(v);
			const PlasticSkeletonVertex &defVx = defSkel.vertex(v);

			int vParent = vx.parent();

			const PlasticSkeletonVertex &vxParent = skel.vertex(vParent);
			const PlasticSkeletonVertex &defVxParent = defSkel.vertex(vParent);

			// Build directions
			int vGrandParent = vxParent.parent();

			TPointD dirFromParent(vx.P() - vxParent.P()),
				dirFromGrandParent(1, 0),
				dirFromDeformedGrandParent(1, 0);

			if (vGrandParent >= 0) {
				const PlasticSkeletonVertex &vxGrandParent = skel.vertex(vGrandParent),
											&defVxGrandParent = defSkel.vertex(vGrandParent);

				dirFromGrandParent = vxParent.P() - vxGrandParent.P();
				dirFromDeformedGrandParent = defVxParent.P() - defVxGrandParent.P();
			}

			// Retrieve angular data
			double angleShift = sd->vertexDeformation(skelId, v)->m_params[SkVD::ANGLE]->getValue(::frame());
			double defaultAngleValue = tcg::consts::rad_to_deg * tcg::point_ops::angle(
																	 dirFromGrandParent, dirFromParent);

			// Convert to radians
			double currentBranchAngle_rad = tcg::point_ops::rad(dirFromDeformedGrandParent);

			double currentAngle_rad = currentBranchAngle_rad + tcg::consts::deg_to_rad * (angleShift + defaultAngleValue);
			double limitDirection_rad = currentBranchAngle_rad + tcg::consts::deg_to_rad * (angleLimit + defaultAngleValue);

			glColor4ub(0, 0, 255, 128);

			// Draw limit lines
			if (angleShift - 180.0 <= angleLimit && angleLimit <= angleShift + 180.0) {
				TPointD limitDirection(cos(limitDirection_rad), sin(limitDirection_rad));

				glBegin(GL_LINES);
				{
					tglVertex(defVxParent.P());
					tglVertex(defVxParent.P() + 1e4 * limitDirection);
				}
				glEnd();
			}

			// Draw limit annulus arc
			angleLimit = tcrop(angleLimit, angleShift - 180.0, angleShift + 180.0);
			limitDirection_rad = currentBranchAngle_rad + tcg::consts::deg_to_rad * (angleLimit + defaultAngleValue);

			double radius = tcg::point_ops::dist(defVx.P(), defVxParent.P()) * 0.25;

			drawAnnulusArc(defVxParent.P(), limitDirection_rad, currentAngle_rad,
						   radius - 5.0 * pixelSize, radius + 5.0 * pixelSize, pixelSize);
		}
	} locals = {this};

	// Dismiss no-ops
	const PlasticSkeletonP &skel = sd->skeleton(skelId);

	if (!skel || v < 0)
		return;

	// Ensure we're editing a vertex with an existing parent
	if (m_dragged) {
		const PlasticSkeletonVertex &vx = skel->vertex(v);

		int vParent = vx.parent();
		if (vParent >= 0) {
			// Draw angular limits
			if (vx.m_minAngle != -l_dmax)
				locals.drawLimit(sd, skelId, v, vx.m_minAngle, pixelSize);

			if (vx.m_maxAngle != l_dmax)
				locals.drawLimit(sd, skelId, v, vx.m_maxAngle, pixelSize);
		}
	}
}

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

void PlasticTool::draw()
{
	glPushAttrib(GL_LINE_BIT | GL_COLOR_BUFFER_BIT | GL_ENABLE_BIT);

	glEnable(GL_BLEND);
	glEnable(GL_LINE_SMOOTH);

	switch (m_mode.getIndex()) {
	case MESH_IDX:
		draw_mesh();

		CASE BUILD_IDX : draw_build();

		CASE RIGIDITY_IDX : draw_rigidity();

		CASE ANIMATE_IDX : draw_animate();
	};

	glPopAttrib();
}