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// TnzCore includes
#include "tstroke.h"
#include "tgl.h"

// TnzBase includes
#include "tenv.h"

// TnzLib includes
#include "toonz/tstageobjectcmd.h"
#include "toonz/toonzimageutils.h"
#include "toonz/txshcolumn.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/tstageobjecttree.h"
#include "toonz/tstageobjectspline.h"
#include "toonz/toonzscene.h"
#include "toonz/stage.h"
#include "toonz/txshcell.h"
#include "toonz/dpiscale.h"
#include "toonz/skeleton.h"
#include "toonz/tscenehandle.h"
#include "toonz/tobjecthandle.h"
#include "toonz/tpinnedrangeset.h"
#include "toonz/tframehandle.h"
#include "toonz/tcolumnhandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/stageobjectutil.h"

// TnzQt includes
#include "toonzqt/selection.h"
#include "toonzqt/selectioncommandids.h"

// TnzTools includes
#include "tools/tool.h"
#include "tools/cursors.h"
#include "tools/toolutils.h"
#include "tw/keycodes.h"

// Qt includes
#include <QCoreApplication> // Qt translation support
#include <QPainter>
#include <QGLWidget>
#include <QPainterPath>
#include <QString>
#include <QImage>
#include <QFont>
#include <QFontMetrics>

#include "skeletonsubtools.h"
#include "skeletontool.h"

using namespace SkeletonSubtools;

TEnv::IntVar SkeletonGlobalKeyFrame("SkeletonToolGlobalKeyFrame", 0);
TEnv::IntVar SkeletonInverseKinematics("SkeletonToolInverseKinematics", 0);

#define BUILD_SKELETON L"Build Skeleton"
#define ANIMATE L"Animate"
#define INVERSE_KINEMATICS L"Inverse Kinematics"

const double alpha = 0.4;

using SkeletonSubtools::HookData;

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

inline std::string removeTrailingH(std::string handle)
{
	if (handle.find("H") == 0)
		return handle.substr(1);
	else
		return handle;
}

//============================================================
//
// util
//
//------------------------------------------------------------

// return true iff column ancestorIndex is column descentIndex or its parent or the parent of the parent, etc.
bool isAncestorOf(int ancestorIndex, int descendentIndex)
{
	TStageObjectId ancestorId = TStageObjectId::ColumnId(ancestorIndex);
	TStageObjectId descendentId = TStageObjectId::ColumnId(descendentIndex);
	TXsheet *xsh = TTool::getApplication()->getCurrentXsheet()->getXsheet();
	while (descendentId != ancestorId && descendentId.isColumn())
		descendentId = xsh->getStageObjectParent(descendentId);
	return descendentId == ancestorId;
}

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

void getHooks(std::vector<HookData> &hooks, TXsheet *xsh, int row, int col, TPointD dpiScale)
{
	// nota. hook position is in the coordinate system of the parent object.
	// a inch is Stage::inch

	TXshCell cell = xsh->getCell(row, col);
	if (!cell.m_level)
		return;

	TStageObjectId columnId = TStageObjectId::ColumnId(col);
	// handle is the current handle (pivot) of the column. It can be H1,H2,... or A,B,C,...
	std::string handle = xsh->getStageObject(TStageObjectId::ColumnId(col))->getHandle();
	bool handleIsHook = handle.find("H") == 0;
	TAffine aff = xsh->getPlacement(columnId, row);

	// imageDpiAff represent the scale factor between the image and the camera
	// derived by dpi match (i.e. ignoring geometric transformation)
	// cameraPos = imageDpiAff * imagePos
	TAffine imageDpiAff;
	if (cell.m_level->getSimpleLevel())
		imageDpiAff = getDpiAffine(cell.m_level->getSimpleLevel(), cell.m_frameId, true);

	// center (inches)
	TPointD center = xsh->getCenter(columnId, row); // getHooks
	if (handleIsHook)
		center = TPointD(0, 0);

	// add the hook #0 (i.e. the regular center)
	hooks.push_back(HookData(xsh, col, 0, aff * TScale(Stage::inch) * center));

	// add the regular hooks
	HookSet *hookSet = cell.m_level->getHookSet();
	if (hookSet && hookSet->getHookCount() > 0) {
		for (int j = 0; j < hookSet->getHookCount(); j++) {
			Hook *hook = hookSet->getHook(j);
			if (hook && !hook->isEmpty()) {
				TPointD pos = hook->getAPos(cell.m_frameId);
				pos = aff * imageDpiAff * pos;
				hooks.push_back(HookData(xsh, col, j + 1, pos));
			}
		}
	}
}

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

void getConnectedColumns(std::set<int> &connectedColumns, TXsheet *xsh, int col)
{
	TStageObjectId id;
	// insert col and all column ancestors
	id = TStageObjectId::ColumnId(col);
	do {
		connectedColumns.insert(id.getIndex());
		id = xsh->getStageObjectParent(id);
	} while (id.isColumn());
	// for each column
	for (int i = 0; i < xsh->getColumnCount(); i++) {
		id = TStageObjectId::ColumnId(i);
		std::vector<TStageObjectId> stack;
		// find a column ancestor already connected; put all the column ancestors in stack
		while (id.isColumn() && connectedColumns.count(id.getIndex()) == 0) {
			stack.push_back(id);
			id = xsh->getStageObjectParent(id);
		}
		if (id.isColumn()) {
			// the stack is connected
			for (int j = 0; j < (int)stack.size(); j++)
				connectedColumns.insert(stack[j].getIndex());
		}
	}
}

bool canShowBone(Skeleton::Bone *bone, TXsheet *xsh, int row)
{
	TStageObjectId id = bone->getStageObject()->getId();
	if (!xsh->getCell(row, id.getIndex()).isEmpty() && xsh->getColumn(id.getIndex())->isCamstandVisible())
		return true;
	int i;
	for (i = 0; i < bone->getChildCount(); i++) {
		if (canShowBone(bone->getChild(i), xsh, row))
			return true;
	}
	return false;
}

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

HookData::HookData(TXsheet *xsh, int columnIndex, int hookId, const TPointD &pos)
	: m_columnIndex(columnIndex), m_hookId(hookId), m_pos(pos), m_isPivot(false)
{
	std::string handle = xsh->getStageObject(TStageObjectId::ColumnId(columnIndex))->getHandle();
	if (m_hookId == 0) {
		// if the current handle is a hook the the hook#0 should be the default center, i.e. B
		if (handle.find("H") == 0)
			m_name = "B";
		else {
			m_name = handle;
			m_isPivot = true;
		}
	} else {
		m_name = toString(m_hookId);
		m_isPivot = "H" + m_name == handle;
	}
}

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

enum ToolDevice {
	TD_None = -1,
	TD_Translation = 1,
	TD_Rotation,
	TD_Center,
	TD_ChangeParent,
	TD_ChangeDrawing,
	TD_IncrementDrawing,
	TD_DecrementDrawing,
	TD_InverseKinematics,

	TD_Hook = 10000,
	TD_LockStageObject = 20000,
	TD_MagicLink = 30000,

	TD_Test = 100000
};

//============================================================
//
// SkeletonTool
//
//------------------------------------------------------------

SkeletonTool skeletonTool;

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

SkeletonTool::SkeletonTool()
	: TTool("T_Skeleton"), m_active(false), m_device(TD_None), m_mode("Mode:"), m_showOnlyActiveSkeleton("Show Only Active Skeleton", false), m_globalKeyframes("Global Key", false), m_dragTool(0), m_firstTime(true), m_currentFrame(-1), m_parentProbe(), m_parentProbeEnabled(false), m_otherColumn(-1), m_otherColumnBBoxAff(), m_otherColumnBBox(), m_labelPos(0, 0), m_label("")
{
	bind(TTool::CommonLevels);
	m_prop.bind(m_mode);
	m_prop.bind(m_globalKeyframes);
	m_prop.bind(m_showOnlyActiveSkeleton);
	m_mode.setId("SkeletonMode");
	m_globalKeyframes.setId("GlobalKey");
	m_showOnlyActiveSkeleton.setId("ShowOnlyActiveSkeleton");

	m_mode.addValue(BUILD_SKELETON);
	m_mode.addValue(ANIMATE);
	m_mode.addValue(INVERSE_KINEMATICS);

	m_commandHandler = new CommandHandler();
	m_commandHandler->setTempPinnedSet(&m_temporaryPinnedColumns);
}

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

SkeletonTool::~SkeletonTool()
{
	delete m_dragTool;
}

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

bool SkeletonTool::onPropertyChanged(string propertyName)
{
	SkeletonGlobalKeyFrame = (int)(m_globalKeyframes.getValue());
	// SkeletonInverseKinematics=(int)(m_ikEnabled.getValue());
	invalidate();
	return false;
}

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

bool SkeletonTool::isGlobalKeyframesEnabled() const
{
	return m_globalKeyframes.getValue();
}

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

void SkeletonTool::updateTranslation()
{
	// m_ikEnabled.setQStringName(tr("Inverse Kinematics"));
	m_showOnlyActiveSkeleton.setQStringName(tr("Show Only Active Skeleton"));
	m_globalKeyframes.setQStringName(tr("Global Key"));
	m_mode.setQStringName(tr("Mode:"));
}

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

bool SkeletonTool::doesApply() const
{
	TTool::Application *app = TTool::getApplication();
	TXsheet *xsh = app->getCurrentXsheet()->getXsheet();
	assert(xsh);
	TStageObjectId objId = app->getCurrentObject()->getObjectId();
	if (objId.isColumn()) {
		TXshColumn *column = xsh->getColumn(objId.getIndex());
		if (column && column->getSoundColumn())
			return false;
	}
	return true;
}

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

void SkeletonTool::mouseMove(const TPointD &, const TMouseEvent &e)
{
	int selectedDevice = pick(e.m_pos);
	if (selectedDevice != m_device) {
		m_device = selectedDevice;
		invalidate();
	}
}

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

void SkeletonTool::leftButtonDown(const TPointD &ppos, const TMouseEvent &e)
{
	m_otherColumn = -1;
	m_otherColumnBBox = TRectD();
	m_otherColumnBBoxAff = TAffine();
	m_labelPos = TPointD(0, 0);
	m_label = "";

	TUndoManager::manager()->beginBlock();
	if (!doesApply())
		return;

	assert(m_dragTool == 0);
	m_dragTool = 0;

	TTool::Application *app = TTool::getApplication();
	int currentColumnIndex = app->getCurrentColumn()->getColumnIndex();
	TXsheet *xsh = app->getCurrentScene()->getScene()->getXsheet();
	TPointD pos = ppos;

	int selectedDevice = pick(e.m_pos);

	// cambio drawing
	if (selectedDevice == TD_ChangeDrawing ||
		selectedDevice == TD_IncrementDrawing ||
		selectedDevice == TD_DecrementDrawing) {
		int d = 0;
		if (selectedDevice == TD_IncrementDrawing)
			d = 1;
		else if (selectedDevice == TD_DecrementDrawing)
			d = -1;
		m_dragTool = new ChangeDrawingTool(this, d);
		m_dragTool->leftButtonDown(ppos, e);
		return;
	}

	// click su un hook: attacca la colonna corrente tramite quell'hook
	if (TD_Hook <= selectedDevice && selectedDevice < TD_Hook + 50) {
		TXsheet *xsh = app->getCurrentXsheet()->getXsheet();
		TStageObjectId objId = TStageObjectId::ColumnId(currentColumnIndex);
		TPointD p0 = getCurrentColumnMatrix() * TPointD(0, 0);
		HookData hook(xsh, currentColumnIndex, selectedDevice - TD_Hook, p0);
		TStageObjectCmd::setHandle(objId, hook.getHandle(), app->getCurrentXsheet());
		app->getCurrentXsheet()->notifyXsheetChanged();
		invalidate();
		return;
	}

	// magic link
	if (TD_MagicLink <= selectedDevice && selectedDevice < TD_MagicLink + (int)m_magicLinks.size()) {
		magicLink(selectedDevice - TD_MagicLink);
		app->getCurrentXsheet()->notifyXsheetChanged();
		return;
	}

	m_device = selectedDevice;
	bool justSelected = false;

	if (m_device < 0) {
		// nessun gadget cliccato. Eventualmente seleziono la colonna
		std::vector<int> columnIndexes;
		getViewer()->posToColumnIndexes(e.m_pos, columnIndexes, getPixelSize() * 5, false);
		if (!columnIndexes.empty()) {
			int columnIndex;
			columnIndex = columnIndexes.back();

			if (columnIndex >= 0 && columnIndex != currentColumnIndex) {
				if (!isColumnLocked(columnIndex)) {
					pos = getMatrix() * pos;
					app->getCurrentColumn()->setColumnIndex(columnIndex);
					updateMatrix();
					currentColumnIndex = columnIndex;
					justSelected = true;
					pos = getMatrix().inv() * pos;
				} else {
					m_label = "Column is locked";
					m_labelPos = pos;
				}
			}
		}
	}

	if (m_device < 0) {
		if (m_mode.getValue() == INVERSE_KINEMATICS)
			m_device = TD_InverseKinematics;
		else if (m_mode.getValue() == ANIMATE)
			m_device = TD_Rotation;
	}

	// lock/unlock: modalita IK
	if (TD_LockStageObject <= m_device && m_device < TD_LockStageObject + 1000) {
		int columnIndex = m_device - TD_LockStageObject;
		int frame = app->getCurrentFrame()->getFrame();
		togglePinnedStatus(columnIndex, frame, e.isShiftPressed());
		invalidate();
		m_dragTool = 0;
		return;
	}

	switch (m_device) {
	case TD_Center:
		m_dragTool = new DragCenterTool(this);
		break;
	case TD_Translation:
		m_dragTool = new DragPositionTool(this);
		break;
	case TD_Rotation:
		m_dragTool = new DragRotationTool(this, justSelected);
		break;
	case TD_ChangeParent:
		m_dragTool = new ParentChangeTool(this, getViewer());
		break;
	case TD_InverseKinematics: {
		Skeleton *skeleton = new Skeleton();
		buildSkeleton(*skeleton, currentColumnIndex);
		m_dragTool = new IKTool(this, getViewer(), skeleton, currentColumnIndex);
		break;
	}
	}

	if (m_dragTool) {
		m_dragTool->leftButtonDown(pos, e);
		invalidate();
	}
}

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

void SkeletonTool::leftButtonDrag(const TPointD &pos, const TMouseEvent &e)
{
	if (m_dragTool) {
		m_dragTool->leftButtonDrag(pos, e);
		invalidate();
	}
}

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

void SkeletonTool::leftButtonUp(const TPointD &pos, const TMouseEvent &e)
{
	m_label = "";
	m_labelPos = TPointD(0, 0);

	if (m_dragTool) {
		m_dragTool->leftButtonUp(pos, e);
		delete m_dragTool;
		m_dragTool = 0;

		TTool::getApplication()->getCurrentXsheet()->notifyXsheetChanged();
		TTool::getApplication()->getCurrentObject()->notifyObjectIdChanged(false); // Keyframes navigator reads this
	}
	if (m_device == TD_IncrementDrawing || m_device == TD_DecrementDrawing || m_device == TD_ChangeDrawing)
		m_device = pick(e.m_pos);
	else
		m_device = -1;
	invalidate();
	TUndoManager::manager()->endBlock();
}

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

bool SkeletonTool::keyDown(int key, TUINT32 flags, const TPoint &pos)
{
	ChangeDrawingTool tool(this, 0);
	if (key == TwConsts::TK_UpArrow)
		tool.changeDrawing(1);
	else if (key == TwConsts::TK_DownArrow)
		tool.changeDrawing(-1);
	else
		return false;
	invalidate();
	return true;
}

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

class TogglePinnedStatusUndo : public TUndo
{
	SkeletonTool *m_tool;
	std::set<int> m_oldTemp, m_newTemp;
	int m_columnIndex, m_oldColumnIndex;
	std::pair<int, int> m_newRange, m_oldRange;
	TAffine m_oldPlacement, m_newPlacement;
	std::vector<std::pair<TStageObjectId, TStageObject::Keyframe>> m_keyframes;
	int m_frame;

public:
	TogglePinnedStatusUndo(SkeletonTool *tool, int frame)
		: m_tool(tool), m_oldTemp(), m_newTemp(), m_columnIndex(-1), m_oldColumnIndex(-1), m_newRange(0, -1), m_oldRange(0, -1), m_frame(frame)
	{
	}

	void addBoneId(const TStageObjectId &id)
	{
		TStageObject *stageObject = getXsheet()->getStageObject(id);
		if (stageObject) {
			TStageObject::Keyframe k = stageObject->getKeyframe(m_frame);
			m_keyframes.push_back(std::make_pair(id, k));
		}
	}

	void setOldRange(int columnIndex, int first, int second, const TAffine &placement)
	{
		m_oldColumnIndex = columnIndex;
		m_oldRange = std::make_pair(first, second);
		m_oldPlacement = placement;
	}
	void setNewRange(int columnIndex, int first, int second, const TAffine &placement)
	{
		m_columnIndex = columnIndex;
		m_newRange = std::make_pair(first, second);
		m_newPlacement = placement;
	}
	void setOldTemp(const std::set<int> &oldTemp) { m_oldTemp = oldTemp; }
	void setNewTemp(const std::set<int> &newTemp) { m_newTemp = newTemp; }

	TStageObject *getStageObject(int columnIndex) const
	{
		return TTool::getApplication()
			->getCurrentXsheet()
			->getXsheet()
			->getStageObject(TStageObjectId::ColumnId(columnIndex));
	}

	TPinnedRangeSet *getRangeSet(int columnIndex) const
	{
		return getStageObject(columnIndex)->getPinnedRangeSet();
	}

	TXsheet *getXsheet() const
	{
		return TTool::getApplication()->getCurrentXsheet()->getXsheet();
	}

	void notify() const
	{
		m_tool->invalidate();
		TXsheet *xsh = getXsheet();
		int index = m_columnIndex;
		if (index < 0)
			index = m_oldColumnIndex;
		if (index >= 0) {
			TStageObjectId id = TStageObjectId::ColumnId(index);
			TStageObjectId parentId;
			while (parentId = xsh->getStageObjectParent(id), parentId.isColumn())
				id = parentId;
			xsh->getStageObject(id)->invalidate();
			TTool::getApplication()->getCurrentXsheet()->notifyXsheetChanged();
			TTool::getApplication()->getCurrentObject()->notifyObjectIdChanged(false);
		}
	}

	void undo() const
	{
		m_tool->setTemporaryPinnedColumns(m_oldTemp);

		if (m_columnIndex >= 0)
			getRangeSet(m_columnIndex)->removeRange(m_newRange.first, m_newRange.second);
		if (m_oldColumnIndex >= 0) {
			TPinnedRangeSet *rangeSet = getRangeSet(m_oldColumnIndex);
			rangeSet->setRange(m_oldRange.first, m_oldRange.second);
			rangeSet->setPlacement(m_oldPlacement);
		}
		TXsheet *xsh = getXsheet();
		for (int i = 0; i < (int)m_keyframes.size(); i++) {
			TStageObject *stageObject = getXsheet()->getStageObject(m_keyframes[i].first);
			if (!stageObject)
				continue;
			stageObject->removeKeyframeWithoutUndo(m_frame);
			if (m_keyframes[i].second.m_isKeyframe)
				stageObject->setKeyframeWithoutUndo(m_frame, m_keyframes[i].second);
		}

		notify();
	}

	void redo() const
	{
		TXsheet *xsh = getXsheet();
		for (int i = 0; i < (int)m_keyframes.size(); i++) {
			TStageObject *stageObject = getXsheet()->getStageObject(m_keyframes[i].first);
			if (stageObject)
				stageObject->setKeyframeWithoutUndo(m_frame);
		}
		m_tool->setTemporaryPinnedColumns(m_newTemp);

		if (m_oldColumnIndex >= 0)
			getRangeSet(m_oldColumnIndex)->removeRange(m_oldRange.first, m_oldRange.second);
		if (m_columnIndex >= 0) {
			TPinnedRangeSet *rangeSet = getRangeSet(m_columnIndex);
			rangeSet->setRange(m_newRange.first, m_newRange.second);
			rangeSet->setPlacement(m_newPlacement);
		}
		notify();
	}
	int getSize() const
	{
		return sizeof *this;
	}
};

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

void SkeletonTool::togglePinnedStatus(int columnIndex, int frame, bool shiftPressed)
{
	Skeleton skeleton;
	buildSkeleton(skeleton, columnIndex);
	if (!skeleton.getRootBone() || !skeleton.getRootBone()->getStageObject())
		return;
	Skeleton::Bone *bone = skeleton.getBoneByColumnIndex(columnIndex);
	assert(bone);
	if (!bone)
		return;

	TogglePinnedStatusUndo *undo = new TogglePinnedStatusUndo(this, frame);
	for (int i = 0; i < skeleton.getBoneCount(); i++) {
		TStageObject *obj = skeleton.getBone(i)->getStageObject();
		if (obj) {
			undo->addBoneId(obj->getId());
			obj->setKeyframeWithoutUndo(frame);
		}
	}

	getApplication()->getCurrentXsheet()->notifyXsheetChanged();
	getApplication()->getCurrentObject()->notifyObjectIdChanged(false);

	undo->setOldTemp(m_temporaryPinnedColumns);
	bool isTemporaryPinned = m_temporaryPinnedColumns.count(columnIndex) > 0;
	if (shiftPressed || isTemporaryPinned) {
		if (isTemporaryPinned)
			m_temporaryPinnedColumns.erase(columnIndex);
		else
			m_temporaryPinnedColumns.insert(columnIndex);
	} else {
		TXsheet *xsh = TTool::getApplication()->getCurrentXsheet()->getXsheet();
		TAffine placement = xsh->getPlacement(bone->getStageObject()->getId(), frame);

		TStageObjectId rootId = skeleton.getRootBone()->getStageObject()->getId();
		TAffine rootPlacement = xsh->getPlacement(rootId, frame);

		int pinnedStatus = bone->getPinnedStatus();
		if (pinnedStatus != Skeleton::Bone::PINNED) {
			int oldPinned = -1;
			for (int i = 0; i < skeleton.getBoneCount(); i++) {
				TStageObject *obj = skeleton.getBone(i)->getStageObject();
				if (obj->getPinnedRangeSet()->isPinned(frame)) {
					oldPinned = i;
					break;
				}
			}

			int lastFrame = 1000000;
			if (oldPinned >= 0) {
				assert(skeleton.getBone(oldPinned) != bone);
				TStageObject *obj = skeleton.getBone(oldPinned)->getStageObject();
				const TPinnedRangeSet::Range *range = obj->getPinnedRangeSet()->getRange(frame);
				assert(range && range->first <= frame && frame <= range->second);
				lastFrame = range->second;
				TPinnedRangeSet *rangeSet = obj->getPinnedRangeSet();
				rangeSet->removeRange(frame, range->second);
				obj->invalidate();
				undo->setOldRange(oldPinned, frame, range->second, rangeSet->getPlacement());
			} else {
				for (int i = 0; i < skeleton.getBoneCount(); i++) {
					TStageObject *obj = skeleton.getBone(i)->getStageObject();
					const TPinnedRangeSet::Range *range = obj->getPinnedRangeSet()->getNextRange(frame);
					if (range) {
						assert(range->first > frame);
						if (range->first - 1 < lastFrame)
							lastFrame = range->first - 1;
					}
				}
			}

			TStageObject *obj = bone->getStageObject();
			TPinnedRangeSet *rangeSet = obj->getPinnedRangeSet();
			rangeSet->setRange(frame, lastFrame);
			if (frame == 0) {
				// this code should be moved elsewhere, possibly in the stageobject implementation
				// the idea is to remove the normal
				TStageObject *rootObj = skeleton.getRootBone()->getStageObject();
				rootObj->setStatus(TStageObject::XY);
				placement = rootObj->getPlacement(0).inv() * placement;
				rootObj->setStatus(TStageObject::IK);
				rangeSet->setPlacement(placement);
				rootObj->invalidate();
			}
			undo->setNewRange(bone->getColumnIndex(), frame, lastFrame, rangeSet->getPlacement());
		}
	}
	undo->setNewTemp(m_temporaryPinnedColumns);
	TUndoManager::manager()->add(undo);
}

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

void SkeletonTool::drawSkeleton(const Skeleton &skeleton, int row)
{
	bool buildingSkeleton = m_mode.getValue() == BUILD_SKELETON;
	bool ikEnabled = m_mode.getValue() == INVERSE_KINEMATICS;

	TXsheet *xsh = getXsheet();
	std::vector<int> showBoneIndex;
	int i;
	for (i = 0; i < skeleton.getBoneCount(); i++) {
		Skeleton::Bone *bone = skeleton.getBone(i);
		TStageObjectId id = bone->getStageObject()->getId();
		bool canShow = canShowBone(bone, xsh, row);
		if (!canShow)
			continue;
		showBoneIndex.push_back(i);
	}

	bool changingParent = dynamic_cast<ParentChangeTool *>(m_dragTool) != 0;
	TStageObjectId currentObjectId = TTool::getApplication()->getCurrentObject()->getObjectId();
	string currentHandle = xsh->getStageObject(currentObjectId)->getHandle();

	for (i = 0; i < (int)showBoneIndex.size(); i++) {
		Skeleton::Bone *bone = skeleton.getBone(showBoneIndex[i]);
		TStageObjectId id = bone->getStageObject()->getId();
		bool isCurrent = id == currentObjectId;
		if (isCurrent && buildingSkeleton && m_parentProbeEnabled) {
			if (!m_magicLinks.empty()) {
				drawBone(bone->getCenter(), m_magicLinks[0].m_h1.m_pos, false);
			}
			drawBone(bone->getCenter(), m_parentProbe, true);
		} else if (ikEnabled) {
			if (bone->getParent())
				drawIKBone(bone->getCenter(), bone->getParent()->getCenter());
		} else if (bone->getParent() || isCurrent) {
			double pixelSize = getPixelSize();
			TPointD a = bone->getCenter();
			TPointD b, pm;
			if (bone->getParent()) {
				b = bone->getParent()->getCenter();
				pm = (a + b) * 0.5;
			} else {
				pm = b = a + TPointD(0, 60) * pixelSize;
			}
			bool boneIsVisible = false;
			if (buildingSkeleton) {
				boneIsVisible = true;
				if (bone->isSelected())
					drawBone(a, b, true);
				else if (!m_showOnlyActiveSkeleton.getValue())
					drawBone(a, b, false);
				else
					boneIsVisible = false;
			}
			if (boneIsVisible && isCurrent) {
				// draw change parent gadget
				double r = pixelSize * 5;
				if (isPicking()) {
					// int code = TD_ResetParent + bone->getStageObject()->getId().getIndex();
					glPushName(TD_ChangeParent);
					tglDrawDisk(pm, r);
					glPopName();
				} else {
					if (m_device == TD_ChangeParent) {
						glColor4d(0.47 * alpha, 0.6 * alpha, 0.65 * alpha, alpha);
						r *= 1.5;
					} else
						glColor4d(0.37 * alpha, 0.5 * alpha, 0.55 * alpha, alpha);
					glRectd(pm.x - r, pm.y - r, pm.x + r, pm.y + r);
					glColor3d(0, 0, 0);
					tglDrawRect(pm.x - r, pm.y - r, pm.x + r, pm.y + r);
				}
			}
		}
	}
	for (i = 0; i < (int)showBoneIndex.size(); i++) {
		Skeleton::Bone *bone = skeleton.getBone(showBoneIndex[i]);
		if (!m_showOnlyActiveSkeleton.getValue() || bone->isSelected())
			drawJoint(bone->getCenter(),
					  currentObjectId == bone->getStageObject()->getId() &&
						  currentHandle.find("H") != 0);
	}
}

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

void SkeletonTool::getImageBoundingBox(TRectD &bbox, TAffine &aff, int frame, int columnIndex)
{
	TAffine columnAff = getXsheet()->getPlacement(TStageObjectId::ColumnId(columnIndex), frame);
	// TAffine affine = getColumnMatrix(columnIndex);
	TXshCell cell = getXsheet()->getCell(frame, columnIndex);
	TImageP image = cell.getImage(false);
	TToonzImageP ti = image;
	TVectorImageP vi = image;
	if (ti) {
		TAffine imageDpiAff;
		if (cell.m_level->getSimpleLevel())
			imageDpiAff = getDpiAffine(cell.m_level->getSimpleLevel(), cell.m_frameId, true);
		aff = columnAff * imageDpiAff;
		bbox = ToonzImageUtils::convertRasterToWorld(convert(ti->getBBox()), ti) * ti->getSubsampling();
		ToolUtils::drawRect(bbox * ti->getSubsampling(), TPixel32(200, 200, 200), 0x5555);
	} else if (vi) {
		bbox = vi->getBBox();
		aff = columnAff;
	} else {
		bbox = TRectD();
		aff = TAffine();
	}
}

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

void SkeletonTool::drawLevelBoundingBox(int frame, int columnIndex)
{
	TAffine affine = getCurrentColumnMatrix();
	TXshCell cell = getXsheet()->getCell(frame, columnIndex);
	TImageP image = cell.getImage(false);
	TToonzImageP ti = image;
	TVectorImageP vi = image;
	glPushMatrix();
	if (affine != getMatrix())
		tglMultMatrix(getMatrix().inv() * affine);
	if (ti) {
		TPointD dpiScale = getViewer()->getDpiScale();
		glScaled(dpiScale.x, dpiScale.y, 1);
		TRectD bbox = ToonzImageUtils::convertRasterToWorld(convert(ti->getBBox()), ti);
		ToolUtils::drawRect(bbox * ti->getSubsampling(), TPixel32(200, 200, 200), 0x5555);
	}
	if (vi) {
		TRectD bbox = vi->getBBox();
		ToolUtils::drawRect(bbox, TPixel32(200, 200, 200), 0x5555);
	}
	glPopMatrix();
}

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

void SkeletonTool::drawIKJoint(const Skeleton::Bone *bone)
{
	TPointD pos = bone->getCenter();
	const double r0 = 6 * getPixelSize(), r1 = r0 / 3;
	int code = TD_LockStageObject + bone->getColumnIndex();
	glPushName(code);
	glColor3d(0.8, 0.5, 0.05);
	if (bone->getPinnedStatus() != Skeleton::Bone::FREE) {
		if (bone->getPinnedStatus() == Skeleton::Bone::TEMP_PINNED) {
			double r1 = r0 * 0.60;
			glColor3d(60.0 / 255.0, 250.0 / 255.0, 1.0);
			glRectd(pos.x - r0, pos.y - r0, pos.x + r0, pos.y + r0);

			glColor3d(0.78, 0.62, 0);
			glRectd(pos.x - r1, pos.y - r1, pos.x + r1, pos.y + r1);

			glColor3d(0.2, 0.1, 0.05);
			tglDrawRect(pos.x - r0, pos.y - r0, pos.x + r0, pos.y + r0);
			tglDrawRect(pos.x - r1, pos.y - r1, pos.x + r1, pos.y + r1);
		} else {
			glColor3d(0, 175.0 / 255.0, 1.0);
			glRectd(pos.x - r0, pos.y - r0, pos.x + r0, pos.y + r0);
			glColor3d(0.2, 0.1, 0.05);
			tglDrawRect(pos.x - r0, pos.y - r0, pos.x + r0, pos.y + r0);
		}
	} else {
		if (bone->isSelected())
			glColor3d(1, 0.78, 0.19);
		else
			glColor3d(0.78, 0.62, 0);
		tglDrawDisk(pos, r0);
		glColor3d(0.2, 0.1, 0.05);
		tglDrawCircle(pos, r0);
	}

	if (m_device == code) {
		glColor3d(0.9, 0.1, 0.1);
		tglFillRect(pos.x - r1, pos.y - r1, pos.x + r1, pos.y + r1);
	} else {
		glColor3d(0.2, 0.1, 0.05);
		const double r3 = 2 * getPixelSize();
		tglDrawCircle(pos, r3);
	}
	glPopName();
}

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

void SkeletonTool::drawJoint(const TPointD &pos, bool current)
{
	const double alpha = 0.8, ialpha = 1 - alpha;
	double r0 = 4 * getPixelSize();
	if (current) {
		glPushName(TD_Center);
		if (m_device == TD_Center) {
			glColor4d(0.9 * alpha, 0.8 * alpha, 0.2 * alpha, alpha);
			r0 *= 1.5;
		} else {
			glColor4d(((255.0 / 255.0) - ialpha) / alpha, ((200.0 / 255.0) - ialpha) / alpha, ((48.0 / 255.0) - ialpha) / alpha, alpha);
		}
		tglDrawDisk(pos, r0);
		glColor3d(0.2, 0.1, 0.05);
		tglDrawCircle(pos, r0);
		glPopName();
	} else {
		// in build skeleton center is clickable, but only the current one
		if (m_mode.getValue() == BUILD_SKELETON)
			glColor4d(0.60 * alpha, 0.60 * alpha, 0.60 * alpha, alpha);
		else
			glColor4d(0.78 * alpha, 0.62 * alpha, 0 * alpha, alpha);
		tglDrawDisk(pos, r0);
		glColor3d(0.2, 0.1, 0.05);
		tglDrawCircle(pos, r0);
	}
}

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

void SkeletonTool::drawBone(const TPointD &a, const TPointD &b, bool selected)
{
	const double alpha = 0.8;
	// se sono troppo vicini niente da fare
	TPointD delta = b - a;
	if (norm2(delta) < 0.001)
		return;
	TPointD u = getPixelSize() * 2.5 * normalize(rotate90(delta));
	if (selected)
		glColor4d(0.9 * alpha, 0.9 * alpha, 0.9 * alpha, alpha);
	else
		glColor4d(0.58 * alpha, 0.58 * alpha, 0.58 * alpha, alpha);
	glBegin(GL_POLYGON);
	tglVertex(a + u);
	tglVertex(b);
	tglVertex(a - u);
	glEnd();
	glColor3d(0.2, 0.3, 0.35);
	glBegin(GL_LINE_STRIP);
	tglVertex(a + u);
	tglVertex(b);
	tglVertex(a - u);
	glEnd();
}

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

void SkeletonTool::drawIKBone(const TPointD &a, const TPointD &b)
{
	// se sono troppo vicini niente da fare
	TPointD delta = b - a;
	if (norm2(delta) < 0.001)
		return;
	TPointD u = getPixelSize() * 2.5 * normalize(rotate90(delta));
	glColor3d(0.58, 0.58, 0.58);
	glBegin(GL_POLYGON);
	tglVertex(a + u);
	tglVertex(b + u);
	tglVertex(b - u);
	tglVertex(a - u);
	glEnd();
	glColor3d(0.2, 0.3, 0.35);
	glBegin(GL_LINES);
	tglVertex(a + u);
	tglVertex(b + u);
	tglVertex(a - u);
	tglVertex(b - u);
	glEnd();
}

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

void SkeletonTool::computeMagicLinks()
{
	//TODO: spostare qui il calcolo dei magic link
}

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

void SkeletonTool::drawHooks()
{
	// camera stand reference system
	//glColor3d(0,0,1);
	//tglDrawRect(3,3,97,97);

	//glColor3d(0,1,1);
	//tglDrawRect(0,100,Stage::inch,110);

	QTime time;
	time.start();

	m_magicLinks.clear();
	computeMagicLinks();

	TTool::Application *app = TTool::getApplication();
	TXsheet *xsh = app->getCurrentXsheet()->getXsheet();
	int row = app->getCurrentFrame()->getFrame();
	int col = app->getCurrentColumn()->getColumnIndex();
	TPointD dpiScale = getViewer()->getDpiScale();

	// glColor3d(1,0,1);
	// tglDrawRect(-100*dpiScale.x, -100*dpiScale.y, 0,0);

	// I should not show hooks of columns already connected with the current one
	// ("linking" to those hooks would create evil loops in the hierarchy)
	std::set<int> connectedColumns;
	getConnectedColumns(connectedColumns, xsh, col);

	std::vector<HookData> currentColumnHooks;
	std::vector<HookData> otherColumnsHooks;

	// fill currentColumnHooks
	// detect otherColumn (i.e. the active column during a click&drag operator
	int otherColumn = -1;
	if (m_parentProbeEnabled) {
		// qDebug("  parent probe enabled");
		// currentColumnHooks <- current column & current handle
		int hookId = 0;
		std::string handle = xsh->getStageObject(TStageObjectId::ColumnId(col))->getHandle();
		if (handle.find("H") == 0) {
			int j = 1;
			while (j < (int)handle.size() && '0' <= handle[j] && handle[j] <= '9') {
				hookId = hookId * 10 + (int)handle[j] - '0';
				j++;
			}
		}

		currentColumnHooks.push_back(HookData(xsh, col, hookId, m_parentProbe));

		// otherColumn = "picked" column not connected
		TPoint parentProbePos = getViewer()->worldToPos(m_parentProbe);
		std::vector<int> indexes;
		getViewer()->posToColumnIndexes(parentProbePos, indexes, getPixelSize() * 10, false);
		for (int i = (int)indexes.size() - 1; i >= 0; i--) {
			if (connectedColumns.count(indexes[i]) == 0) {
				otherColumn = indexes[i];
				break;
			}
		}
		// if the mouse is not on a stroke, I'm using the "old" m_otherColumn, if any.
		// (this is needed because of the hooks put inside of unfilled regions)
		if (otherColumn < 0 && m_otherColumn >= 0) {
			if (m_otherColumnBBox.contains(m_otherColumnBBoxAff.inv() * m_parentProbe))
				otherColumn = m_otherColumn;
			else
				m_otherColumn = -1;
		}
	} else {
		// parent probe not enabled: get all hooks of current column. other column = -1
		getHooks(currentColumnHooks, xsh, row, col, TPointD(1, 1)); // dpiScale);
	}

	// other columns hooks <- all hooks of all unlinked columns
	for (int i = 0; i < xsh->getColumnCount(); i++)
		if (xsh->getColumn(i)->isCamstandVisible())
			if (connectedColumns.count(i) == 0)
				getHooks(otherColumnsHooks, xsh, row, i, TPointD(1, 1)); // dpiScale);

	/*
  qDebug("  time=%dms", time.elapsed());
  qDebug("  %d hooks (current column)", currentColumnHooks.size());
  for(int i=0;i<(int)currentColumnHooks.size();i++)
    qDebug("    %d,%d",currentColumnHooks[i].m_columnIndex,currentColumnHooks[i].m_hookId);
  qDebug("  %d hooks (other columns)", otherColumnsHooks.size());
  for(int i=0;i<(int)otherColumnsHooks.size();i++)
    qDebug("    %d,%d",otherColumnsHooks[i].m_columnIndex,otherColumnsHooks[i].m_hookId);
*/

	std::vector<TRectD> balloons;

	// draw current column hooks
	for (int i = 0; i < (int)currentColumnHooks.size(); i++) {
		const HookData &hook = currentColumnHooks[i];
		if (hook.m_name == "")
			continue; // should not happen
		int code = TD_Hook + hook.m_hookId;
		TPointD pos = hook.m_pos;
		ToolUtils::drawHook(pos, ToolUtils::OtherLevelHook);
		glPushName(code);
		TPixel32 color(200, 220, 205, 200);
		if (hook.m_isPivot)
			color = TPixel32(200, 200, 10, 200);
		else if (code == m_device)
			color = TPixel32(185, 255, 255);
		ToolUtils::drawBalloon(pos, hook.m_name, color, TPoint(20, 20), isPicking(), &balloons);
		glPopName();
	}

	if (m_parentProbeEnabled) {
		for (int i = 0; i < (int)otherColumnsHooks.size(); i++)
			ToolUtils::drawHook(otherColumnsHooks[i].m_pos, ToolUtils::OtherLevelHook);
	}

	// search for magic links
	double minDist2 = 0;
	double snapRadius2 = 100 * getPixelSize() * getPixelSize();
	double snapRadius2bis = 100;

	if (!m_parentProbeEnabled) {
		// "static" magic links: no parent probe
		for (int i = 0; i < (int)currentColumnHooks.size(); i++) {
			for (int j = 0; j < (int)otherColumnsHooks.size(); j++) {
				double dist2 = norm2(currentColumnHooks[i].m_pos - otherColumnsHooks[j].m_pos);
				if (currentColumnHooks[i].m_hookId == 0 || otherColumnsHooks[j].m_hookId == 0)
					continue;
				if (dist2 < snapRadius2bis) {
					m_magicLinks.push_back(MagicLink(currentColumnHooks[i], otherColumnsHooks[j], dist2));

					qDebug("  magic link_a %d (%d,%d) %d (%d,%d); dist=%f",
						   i,
						   currentColumnHooks[i].m_columnIndex,
						   currentColumnHooks[i].m_hookId,
						   j,
						   otherColumnsHooks[j].m_columnIndex,
						   otherColumnsHooks[j].m_hookId,
						   dist2);
				}
			}
		}
	}

	if (m_parentProbeEnabled) {
		// search for the closest hook of the picked column
		int i = -1, j = -1;
		double minDist2 = snapRadius2;
		for (i = 0; i < (int)otherColumnsHooks.size(); i++) {
			double dist2 = tdistance2(otherColumnsHooks[i].m_pos, m_parentProbe);
			if (dist2 < minDist2) {
				j = i;
				minDist2 = dist2;
				otherColumn = otherColumnsHooks[i].m_columnIndex;
			}
		}
	}

	if (m_parentProbeEnabled && otherColumn >= 0) //  && m_magicLinks.empty()
	{
		// "dynamic" magic links: probing and picking a column

		// show image bounding box
		m_otherColumn = otherColumn;
		getImageBoundingBox(m_otherColumnBBox, m_otherColumnBBoxAff, row, otherColumn);
		if (!m_otherColumnBBox.isEmpty()) {
			glPushMatrix();
			tglMultMatrix(m_otherColumnBBoxAff);
			ToolUtils::drawRect(m_otherColumnBBox, TPixel32(188, 202, 191), 0xF0F0);
			//tglDrawRect(img->getBBox());
			glPopMatrix();
		}

		/*
    TXshCell cell = xsh->getCell(row, otherColumn);
    //TAffine aff = xsh->getPlacement(TStageObjectId::ColumnId(otherColumn),row);
    //m_otherColumnAff = aff;
    TImageP img = cell.getImage(false);
    if(img)
    {
      getImageBoundingBox(m_otherColumnBBox, m_otherColumnBBoxAff, row, otherColumn);
      //glColor3d(188.0/255.0, 202.0/255.0, 191.0/255.0);
      glPushMatrix();
      tglMultMatrix(aff * imageDpiAff);
      ToolUtils::drawRect(img->getBBox(), TPixel32(188,202,191), 0xF0F0);
      //tglDrawRect(img->getBBox());
      glPopMatrix();
    }
*/
		// search for the closest hook of the picked column
		int i = -1, j = -1;
		double minDist2 = snapRadius2;
		for (i = 0; i < (int)otherColumnsHooks.size(); i++)
			if (otherColumnsHooks[i].m_columnIndex == otherColumn) {
				double dist2 = tdistance2(otherColumnsHooks[i].m_pos, m_parentProbe);
				if (j < 0)
					j = i;
				else if (dist2 < minDist2 || otherColumnsHooks[i].m_hookId == 0) {
					j = i;
					minDist2 = dist2;
				}
			}
		// visualize a balloon for the closest hook
		if (0 <= j && j < (int)otherColumnsHooks.size()) {
			// I want to get a specific color when overlaying the label on white
			int alfa = 100, ialfa = 255 - alfa;
			TPixel32 color(255 * (188 - ialfa) / alfa, 255 * (202 - ialfa) / alfa, 255 * (191 - ialfa) / alfa, alfa);
			ToolUtils::drawBalloon(
				otherColumnsHooks[j].m_pos,
				otherColumnsHooks[j].m_name, // getHandle(),
				color,
				TPoint(20, 20),
				false,
				&balloons);

			HookData baseHook = currentColumnHooks[0];
			baseHook.m_pos = otherColumnsHooks[j].m_pos;

			// this is also a magic link
			m_magicLinks.push_back(MagicLink(baseHook, otherColumnsHooks[j], 10000));
		}
	}

	// visualize all the magic links

	for (int i = 0; i < (int)m_magicLinks.size(); i++) {
		const MagicLink &magicLink = m_magicLinks[i];
		const HookData &h1 = magicLink.m_h1;
		std::string name;
		name = (m_parentProbeEnabled ? "Linking " : "Link ") + removeTrailingH(magicLink.m_h0.getHandle()) +
			   " to Col " + toString(h1.m_columnIndex + 1) + "/" + removeTrailingH(h1.getHandle());

		int code = TD_MagicLink + i;
		glPushName(code);
		TPixel32 color(100, 255, 100, 100);
		if (code == m_device)
			color = TPixel32(185, 255, 255);
		ToolUtils::drawBalloon(magicLink.m_h0.m_pos, name, color, TPoint(20, -20), isPicking(), &balloons);
		glPopName();
	}
}

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

void SkeletonTool::drawDrawingBrowser(const TXshCell &cell, const TPointD &center)
{
	if (!cell.m_level || cell.m_level->getFrameCount() <= 1)
		return;
	double pixelSize = getPixelSize();

	string name = toString(cell.m_level->getName()) + "." + toString(cell.m_frameId.getNumber());

	QString qText = QString::fromStdString(name);
	QFont font("Arial", 10); // ,QFont::Bold);
	QFontMetrics fm(font);
	QSize textSize = fm.boundingRect(qText).size();
	int arrowHeight = 10;
	int minTextWidth = 2 * arrowHeight + 5;
	if (textSize.width() < minTextWidth)
		textSize.setWidth(minTextWidth);
	QSize totalSize(textSize.width(), textSize.height() + 2 * arrowHeight);
	TPointD p = center + TPointD(30, -arrowHeight) * pixelSize;
	QRect textRect(0, arrowHeight, textSize.width(), textSize.height());

	assert(glGetError() == 0);

	if (isPicking()) {
		double x0 = p.x, x1 = p.x + totalSize.width() * pixelSize;
		double y0 = p.y, y3 = p.y + totalSize.height() * pixelSize;
		double y1 = y0 + arrowHeight * pixelSize;
		double y2 = y3 - arrowHeight * pixelSize;
		double x = (x0 + x1) * 0.5;
		double d = arrowHeight * pixelSize;

		glColor3d(0, 1, 0);
		glPushName(TD_ChangeDrawing);
		glRectd(x0, y1, x1, y2);
		glPopName();
		glPushName(TD_IncrementDrawing);
		glBegin(GL_POLYGON);
		glVertex2d(x, y0);
		glVertex2d(x + d, y0 + d);
		glVertex2d(x - d, y0 + d);
		glEnd();
		glPopName();
		glPushName(TD_DecrementDrawing);
		glBegin(GL_POLYGON);
		glVertex2d(x, y3);
		glVertex2d(x + d, y3 - d);
		glVertex2d(x - d, y3 - d);
		glEnd();
		glPopName();
		return;
	} else {

		assert(glGetError() == 0);
		bool active = m_device == TD_ChangeDrawing || m_device == TD_IncrementDrawing || m_device == TD_DecrementDrawing;
		QImage img(totalSize.width(), totalSize.height(), QImage::Format_ARGB32);
		img.fill(Qt::transparent);
		QPainter imgPainter(&img);
		imgPainter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);

		//imgPainter.setPen(Qt::black);
		//imgPainter.drawRect(0,0,totalSize.width(),totalSize.height());

		imgPainter.setPen(Qt::NoPen);
		imgPainter.setBrush(QColor(200, 200, 200, 200));
		imgPainter.drawRect(textRect);
		imgPainter.setPen(active ? Qt::red : Qt::black);
		imgPainter.setBrush(Qt::NoBrush);
		imgPainter.setFont(font);
		imgPainter.drawText(textRect, Qt::AlignCenter, qText);

		if (active) {
			int x = textRect.center().x();
			int d = arrowHeight - 4;
			int y = 0;
			QPainterPath upArrow;
			upArrow.moveTo(x, y);
			upArrow.lineTo(x + d, y + d);
			upArrow.lineTo(x - d, y + d);
			upArrow.lineTo(x, y);
			y = totalSize.height() - 1;
			QPainterPath dnArrow;
			dnArrow.moveTo(x, y);
			dnArrow.lineTo(x + d, y - d);
			dnArrow.lineTo(x - d, y - d);
			dnArrow.lineTo(x, y);

			imgPainter.setPen(Qt::NoPen);
			imgPainter.setBrush(m_device == TD_DecrementDrawing ? QColor(255, 0, 0) : QColor(200, 100, 100));
			imgPainter.drawPath(upArrow);
			imgPainter.setBrush(m_device == TD_IncrementDrawing ? QColor(255, 0, 0) : QColor(200, 100, 100));
			imgPainter.drawPath(dnArrow);
		}

		QImage texture = QGLWidget::convertToGLFormat(img);

		glRasterPos2f(p.x, p.y);
		// glBitmap(0,0,0,0,  0,-size.height()+(y+delta.y),  NULL); //
		glEnable(GL_BLEND);
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
		glDrawPixels(texture.width(), texture.height(), GL_RGBA, GL_UNSIGNED_BYTE, texture.bits());
		glDisable(GL_BLEND);
		glColor3d(0, 0, 0);

		assert(glGetError() == 0);
	}
}

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

void SkeletonTool::drawMainGadget(const TPointD &center)
{
	assert(glGetError() == GL_NO_ERROR);

	double r = 10 * getPixelSize();
	double cx = center.x + r * 1.1;
	double cy = center.y - r * 1.1;

	glColor3d(1, 0, 0);

	if (isPicking()) {
		glPushName(TD_Translation);
		tglDrawDisk(TPointD(cx, cy), getPixelSize() * 9);
		glPopName();
		return;
	}

	QImage img(19, 19, QImage::Format_ARGB32);
	img.fill(Qt::transparent);
	QPainter p(&img);
	// p.setRenderHints(QPainter::Antialiasing|QPainter::TextAntialiasing);

	QPainterPath pp;
	int dx = 1, dy = 0;
	for (int i = 0; i < 4; i++) {
		int x = 9 + dx * 8;
		int y = 9 + dy * 8;
		pp.moveTo(9, 9);
		pp.lineTo(x, y);
		pp.lineTo(x - 2 * dx - 2 * dy, y - 2 * dy + 2 * dx);
		pp.moveTo(x, y);
		pp.lineTo(x - 2 * dx + 2 * dy, y - 2 * dy - 2 * dx);
		int d = dx;
		dx = -dy;
		dy = d;
	}

	p.setPen(QPen(Qt::white, 3));
	p.drawPath(pp);
	p.setPen(Qt::black);
	p.drawPath(pp);

	p.setBrush(QColor(54, 213, 54));
	p.drawRect(6, 6, 6, 6);
	QImage texture = QGLWidget::convertToGLFormat(img);
	// texture.save("c:\\urka.png");

	glRasterPos2f(center.x + r * 1.1, center.y - r * 1.1);
	glBitmap(0, 0, 0, 0, -9, -9, NULL);
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glDrawPixels(texture.width(), texture.height(), GL_RGBA, GL_UNSIGNED_BYTE, texture.bits());
	glDisable(GL_BLEND);
	glColor3d(0, 0, 0);

	assert(glGetError() == GL_NO_ERROR);
}

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

void SkeletonTool::draw()
{
	// parent object reference system
	//glColor3d(1,0,0);
	//tglDrawRect(0,0,100,100);

	if (m_label != "")
		ToolUtils::drawBalloon(m_labelPos, m_label, TPixel32::Red, TPoint(20, -20), false);

	bool ikEnabled = m_mode.getValue() == INVERSE_KINEMATICS;
	assert(glGetError() == GL_NO_ERROR);

	// l'xsheet, oggetto (e relativo placement), frame corrente
	TTool::Application *app = TTool::getApplication();
	TXsheet *xsh = getXsheet();
	assert(xsh);
	TStageObjectId objId = app->getCurrentObject()->getObjectId();
	// se l'oggetto corrente non e' una colonna non disegno nulla
	if (!objId.isColumn())
		return;

	TStageObject *pegbar = xsh->getStageObject(objId);
	int col = objId.getIndex();

	int frame = app->getCurrentFrame()->getFrame();
	if (m_currentFrame != frame)
		m_temporaryPinnedColumns.clear();

	TAffine aff = getMatrix();
	// puo' suggere che il placement degeneri (es.: c'e' uno h-scale = 0%)
	if (fabs(aff.det()) < 0.00001)
		return;

	// m_unit = getPixelSize() * sqrt(fabs(aff.det()));

	if (!ikEnabled)
		drawLevelBoundingBox(frame, col);

	glPushMatrix();
	tglMultMatrix(aff.inv());

	// camera stand reference system
	//glColor3d(0,1,0);
	//tglDrawRect(0,0,100,100);

	bool changingParent = dynamic_cast<ParentChangeTool *>(m_dragTool) != 0;

	// !changingParent &&
	if (m_mode.getValue() == BUILD_SKELETON && !xsh->getStageObjectParent(objId).isColumn()) {
		if (!changingParent)
			drawHooks();
	}

	Skeleton skeleton;
	buildSkeleton(skeleton, col);

	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	drawSkeleton(skeleton, frame);
	glDisable(GL_BLEND);

	TXshCell cell = xsh->getCell(frame, objId.getIndex());
	Skeleton::Bone *rootBone = skeleton.getRootBone();
	for (int i = 0; i < skeleton.getBoneCount(); i++) {
		Skeleton::Bone *bone = skeleton.getBone(i);
		TStageObjectId currentId = bone->getStageObject()->getId();
		bool isCurrent = (currentId == objId);
		TPointD pos = bone->getCenter();
		if (isCurrent && m_mode.getValue() != BUILD_SKELETON) {
			drawDrawingBrowser(cell, pos);
		}

		bool isActiveChain = bone->isSelected();

		glColor3d(0, 1, 0);
		if (ikEnabled) {
			drawIKJoint(bone);
		} else {
			TPointD pos = bone->getCenter();
			if (isCurrent && m_mode.getValue() == ANIMATE) {
				drawMainGadget(pos);
			}
		}
	}
	m_currentFrame = frame;

	if (m_dragTool)
		m_dragTool->draw();
	glPopMatrix();
}

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

void SkeletonTool::onActivate()
{
	TTool::Application *app = TTool::getApplication();
	if (m_firstTime) {
		m_globalKeyframes.setValue(SkeletonGlobalKeyFrame ? 1 : 0);
		m_mode.setValue(BUILD_SKELETON);
		// m_ikEnabled.setValue(SkeletonInverseKinematics ? 1 : 0);
		m_firstTime = false;
	}
	TStageObjectId objId = app->getCurrentObject()->getObjectId();
	if (objId == TStageObjectId::NoneId) {
		int index = app->getCurrentColumn()->getColumnIndex();
		objId = TStageObjectId::ColumnId(index);
	}
	//  app->editStageObject(objId);
}

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

void SkeletonTool::onDeactivate()
{
	//m_selection.selectNone();
	//TSelection::setCurrent(0);
}

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

SkeletonSubtools::MagicLink SkeletonTool::getMagicLink(int index) const
{
	assert(0 <= index && index < (int)m_magicLinks.size());
	return m_magicLinks[index];
}

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

void SkeletonTool::magicLink(int index)
{
	if (index < 0 || index >= (int)m_magicLinks.size())
		return;
	HookData h0 = m_magicLinks[index].m_h0;
	HookData h1 = m_magicLinks[index].m_h1;
	TTool::Application *app = TTool::getApplication();
	TXsheet *xsh = app->getCurrentXsheet()->getXsheet();
	int columnIndex = app->getCurrentColumn()->getColumnIndex();
	TStageObjectId id = TStageObjectId::ColumnId(columnIndex);
	TStageObject *obj = xsh->getStageObject(id);

	int parentColumnIndex = h1.m_columnIndex;
	TStageObjectId parentId = TStageObjectId::ColumnId(parentColumnIndex);
	std::string parentHandle = h1.getHandle();

	std::string handle = "";
	if (h0.m_columnIndex < 0) {
		handle = obj->getHandle();
	} else {
		handle = h0.getHandle();
	}

	//TUndoManager *undoManager = TUndoManager::manager();
	//undoManager->beginBlock();
	TStageObjectCmd::setHandle(id, handle, app->getCurrentXsheet());
	TStageObjectCmd::setParent(id, parentId, parentHandle, app->getCurrentXsheet());
	//undoManager->endBlock();
}

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

int SkeletonTool::getCursorId() const
{
	switch (m_device) {
	case TD_None:
		if (m_mode.getValue() == BUILD_SKELETON)
			break;
		else
			return ToolCursor::RotCursor;
	case TD_Translation:
		return ToolCursor::MoveCursor;
	case TD_Rotation:
		return ToolCursor::RotCursor;
	default:
		return ToolCursor::StrokeSelectCursor;
	}
	return ToolCursor::StrokeSelectCursor;
}

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

void SkeletonTool::addContextMenuItems(QMenu *menu)
{
	bool ikEnabled = m_mode.getValue() == INVERSE_KINEMATICS;

	if (ikEnabled) {
		Skeleton *skeleton = new Skeleton();
		buildSkeleton(*skeleton, TTool::getApplication()->getCurrentColumn()->getColumnIndex());
		if (skeleton->hasPinnedRanges() || skeleton->isIKEnabled()) {
			m_commandHandler->setSkeleton(skeleton);
			QAction *rp = menu->addAction(tr("Reset Pinned Center"));
			menu->addSeparator();
			bool ret = QObject::connect(
				rp, SIGNAL(triggered()),
				m_commandHandler, SLOT(clearPinnedRanges()));
			assert(ret);
		} else
			delete skeleton;
	}
}

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

void SkeletonTool::buildSkeleton(Skeleton &skeleton, int columnIndex)
{
	int frame = TTool::getApplication()->getCurrentFrame()->getFrame();
	skeleton.build(getXsheet(), frame, columnIndex, m_temporaryPinnedColumns);
}