#include "tools/tool.h"
#include "tools/toolutils.h"
#include "tools/cursors.h"
#include "tproperty.h"
#include "tdata.h"
#include "tconvert.h"
#include "tgl.h"
#include "tstroke.h"
#include "tvectorimage.h"
#include "hookselection.h"
#include "tools/toolhandle.h"

#include "toonzqt/selection.h"

#include "toonz/tframehandle.h"
#include "toonz/txshlevelhandle.h"
#include "toonz/tscenehandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/tcolumnhandle.h"
#include "toonz/hook.h"
#include "toonz/txshlevel.h"
#include "toonz/toonzscene.h"
#include "toonz/txsheet.h"
#include "toonz/txshcell.h"
#include "toonz/txshcolumn.h"
#include "toonz/tstageobjecttree.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/levelproperties.h"
#include "toonz/toonzimageutils.h"
#include "toonz/dpiscale.h"
#include "toonz/onionskinmask.h"
#include "toonz/tonionskinmaskhandle.h"
#include <math.h>

// For Qt translation support
#include <QCoreApplication>

#include <QPainter>
#include <QGLWidget>

using namespace ToolUtils;

//=============================================================================
namespace
{
//-----------------------------------------------------------------------------

//=============================================================================
// OtherHook
//-----------------------------------------------------------------------------

class OtherHook
{
public:
	int m_columnIndex;
	int m_hookIndex;
	TPointD m_hookPos;
	OtherHook(int columnIndex, int hookIndex, const TPointD &hookPos)
		: m_columnIndex(columnIndex), m_hookIndex(hookIndex), m_hookPos(hookPos)
	{
	}
};

} // namespace

//=============================================================================
// HookTool
//-----------------------------------------------------------------------------

class HookTool : public TTool
{
	Q_DECLARE_TR_FUNCTIONS(HookTool)

	HookSelection m_selection;

	TPointD m_firstPos, m_lastPos;
	int m_hookId, m_hookSide;
	bool m_deselectArmed;
	HookUndo *m_undo;
	std::vector<OtherHook> m_otherHooks;

	TPropertyGroup m_prop;
	TBoolProperty m_snappedActive;

	TPointD m_snappedPos;
	string m_snappedReason;
	TRectD m_shapeBBox;
	bool m_snapped, m_hookSetChanged;

	bool m_buttonDown;
	TPointD m_pivotOffset;

	void getOtherHooks(std::vector<OtherHook> &otherHooks);

public:
	HookTool();

	ToolType getToolType() const { return TTool::LevelReadTool; }

	HookSet *getHookSet() const;

	void updateTranslation();

	void draw();

	void leftButtonDown(const TPointD &pos, const TMouseEvent &e);
	void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);
	void leftButtonUp(const TPointD &pos, const TMouseEvent &);
	void mouseMove(const TPointD &pos, const TMouseEvent &e);

	void onActivate();
	void onDeactivate();
	void onEnter();
	void onImageChanged()
	{
		m_selection.selectNone();
		m_hookId = -1;
		m_otherHooks.clear();
		getOtherHooks(m_otherHooks);
		invalidate();
	}

	TPropertyGroup *getProperties(int targetType) { return &m_prop; }

	int getCursorId() const { return ToolCursor::MoveCursor; }

	void onSelectionChanged() { invalidate(); }
	bool select(const TSelection *) { return false; }

	bool pick(int &hookId, int &side, const TPointD &pos);

	bool snap(TPointD &pos, double &range2);

	bool isSnappedActive() const
	{
		return m_snappedActive.getValue();
	}
	bool isEditingScene() const
	{
		return getApplication()->getCurrentFrame()->isEditingScene();
	}

	// pivot is the hook the level is attached to.
	// returns -1 if no pivot is defined.
	// Hook1 <==> index=0
	int getPivotIndex()
	{
		if (!isEditingScene())
			return -1; // a pivot can be defined only when editing a scene
		std::string handle = getXsheet()->getStageObject(getObjectId())->getHandle();
		if (handle.find("H") != 0)
			return -1;
		return toInt(handle.substr(1)) - 1;
	}
	void drawHooks(HookSet *hookSet, const TFrameId &fid, bool isOnion);
	// other hooks are drawn in the current level reference frame
	// when the current matrix changes (e.g. because of a parent change or a handle change)
	// we must recompute the hooks positions
	void updateMatrix()
	{
		TTool::updateMatrix();
		m_otherHooks.clear();
		getOtherHooks(m_otherHooks);
	}

} hookTool;

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

HookTool::HookTool()
	: TTool("T_Hook"), m_hookId(-1), m_hookSide(0), m_deselectArmed(false), m_undo(0), m_snappedActive("Snap", true) //W_ToolOptions_Snapped
	  ,
	  m_snappedPos(), m_snappedReason(""), m_shapeBBox(), m_snapped(false), m_hookSetChanged(false), m_buttonDown(false), m_pivotOffset()
{
	bind(TTool::CommonLevels);
	m_prop.bind(m_snappedActive);

	m_snappedActive.setId("Snap");
}

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

void HookTool::updateTranslation()
{
	m_snappedActive.setQStringName(tr("Snap"));
}

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

HookSet *HookTool::getHookSet() const
{
	TXshLevel *xl = TTool::getApplication()->getCurrentLevel()->getLevel();
	if (!xl)
		return 0;
	return xl->getHookSet();
}

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

//
// search for hooks located on other columns (they are used as a reference)
// the position of hooks is computed in the current level reference frame
//
void HookTool::getOtherHooks(std::vector<OtherHook> &otherHooks)
{
	if (!getViewer())
		return;
	TPointD dpi = getViewer()->getDpiScale();
	TAffine myAffInv = (getCurrentColumnMatrix() * TScale(dpi.x, dpi.y)).inv();
	TXsheet *xsh = getXsheet();
	int row = getFrame();
	int curCol = getColumnIndex();
	int i;
	for (i = 0; i < xsh->getColumnCount(); i++) {
		if (!xsh->getColumn(i) || !xsh->getColumn(i)->isCamstandVisible())
			continue;
		if (i == curCol)
			continue;
		TXshCell cell = xsh->getCell(row, i);
		if (cell.isEmpty())
			continue;
		TAffine aff = myAffInv * xsh->getPlacement(TStageObjectId::ColumnId(i), row);
		if (cell.getSimpleLevel())
			aff = aff * getDpiAffine(cell.getSimpleLevel(), cell.m_frameId, true);
		HookSet *hookSet = cell.m_level->getHookSet();
		int j;

		for (j = 0; j < hookSet->getHookCount(); j++) {
			Hook *hook = hookSet->getHook(j);
			if (hook == 0 || hook->isEmpty())
				continue;
			TPointD aPos = aff * hook->getAPos(cell.m_frameId);
			TPointD bPos = aff * hook->getBPos(cell.m_frameId);
			otherHooks.push_back(OtherHook(i, j, aPos));
		}
	}
}

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

void HookTool::drawHooks(HookSet *hookSet, const TFrameId &fid, bool isOnion)
{
	int pivotIndex = getPivotIndex();
	int i;
	for (i = 0; i < hookSet->getHookCount(); i++) {
		Hook *hook = hookSet->getHook(i);
		if (!hook || hook->isEmpty())
			continue;
		assert(hook);
		TPointD p0 = hook->getAPos(fid);
		TPointD p1 = hook->getBPos(fid);
		if (pivotIndex == i) {
			// translating the pivot doesn't change its actual position, but just the m_pivotOffset
			// the actual pivot position is changed in the mouseUp event
			p0 += m_pivotOffset;
			p1 += m_pivotOffset;
		}
		bool linked = p0 == p1;
		drawHook(p0, linked ? NormalHook : PassHookA, m_selection.isSelected(i, 1), isOnion);
		if (!linked)
			drawHook(p1, PassHookB, m_selection.isSelected(i, 2), isOnion);
	}
}

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

void HookTool::draw()
{
	// ToolUtils::drawRect(TRectD(10,10,110,110), TPixel32(255,200,200), 0xFFF0);

	// draw the current image bounding box
	const double v200 = 200.0 / 255.0;
	TImageP image = getImage(false);
	if (!image)
		return;

	TToonzImageP ti = image;
	TVectorImageP vi = image;
	if (ti) {
		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);
	}

	// draw hooks
	HookSet *hookSet = getHookSet();
	if (!hookSet)
		return;

	TTool::Application *app = TTool::getApplication();
	TFrameHandle *fh = app->getCurrentFrame();
	TFrameId fid = getCurrentFid();
	TXshSimpleLevel *level = 0;

	OnionSkinMask osm = app->getCurrentOnionSkin()->getOnionSkinMask();
	std::vector<int> os;

	if (isEditingScene())
		osm.getAll(getFrame(), os);
	else {
		level = app->getCurrentLevel()->getSimpleLevel();
		assert(level);
		osm.getAll(level->guessIndex(fid), os);
	}

	int i;
	if (osm.isEnabled())
		for (i = 0; i < (int)os.size(); i++) {
			if (isEditingScene()) {
				const TXshCell &cell = getXsheet()->getCell(os[i], app->getCurrentColumn()->getColumnIndex());
				drawHooks(hookSet, cell.getFrameId(), true);
			} else {
				const TFrameId &fid2 = level->index2fid(os[i]);
				drawHooks(hookSet, fid2, true);
			}
		}

	drawHooks(hookSet, fid, false);

	//TXshCell cell = xsh->getCell(row, i);
	// draw other level hooks
	if (isSnappedActive() && isEditingScene()) {
		for (i = 0; i < (int)m_otherHooks.size(); i++) {
			drawHook(m_otherHooks[i].m_hookPos, OtherLevelHook, false);
		}
	}

	// draw hooks balloons
	std::vector<TRectD> balloons; // this is used to avoid balloons overlapping
	int pivotIndex = getPivotIndex();
	for (i = 0; i < hookSet->getHookCount(); i++) {
		Hook *hook = hookSet->getHook(i);
		if (!hook || hook->isEmpty())
			continue;
		assert(hook);
		TPointD p0 = hook->getAPos(fid);
		TPointD p1 = hook->getBPos(fid);
		bool linked = p0 == p1;
		if (i == pivotIndex) {
			p0 += m_pivotOffset;
			p1 += m_pivotOffset;
		}
		TPixel32 balloonColor(200, 220, 205, 200);
		TPoint balloonOffset(20, 20);
		string hookName = toString(i + 1);
		drawBalloon(p0, hookName, balloonColor, balloonOffset, false, &balloons);
		if (!linked)
			drawBalloon(p1, hookName, balloonColor, balloonOffset, false, &balloons);
	}
	// draw snapped hook balloon
	if (m_snappedReason != "") {
		TPointD pos = m_snappedPos;
		TRectD bbox = m_shapeBBox;
		if (bbox.getLx() > 0 && bbox.getLy() > 0) {
			glColor3d(v200, v200, v200);
			glEnable(GL_LINE_STIPPLE);
			glLineStipple(5, 0xAAAA);
			tglDrawRect(bbox);
			glDisable(GL_LINE_STIPPLE);

			glBegin(GL_LINES);
			glVertex2d(pos.x, bbox.y0);
			glVertex2d(pos.x, bbox.y1);
			glVertex2d(bbox.x0, pos.y);
			glVertex2d(bbox.x1, pos.y);
			glEnd();
			glDisable(GL_LINE_STIPPLE);
		}
		drawBalloon(pos, m_snappedReason, TPixel32(200, 250, 180, 200), TPoint(20, 20), false, &balloons);
	}
}

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

// side : 1=A,2=B,3=A&B
bool HookTool::pick(int &hookId, int &side, const TPointD &pos)
{
	HookSet *hookSet = getHookSet();
	if (!hookSet)
		return false;

	TFrameId fid = getCurrentFid();
	double minDist2 = 1e8;
	for (int i = 0; i < hookSet->getHookCount(); i++) {
		Hook *hook = hookSet->getHook(i);
		if (!hook || hook->isEmpty())
			continue;
		TPointD aPos = hook->getAPos(fid);
		TPointD bPos = hook->getBPos(fid);
		bool linked = aPos == bPos;
		if (linked) {
			double dist2 = tdistance2(pos, aPos);
			if (dist2 < minDist2) {
				minDist2 = dist2;
				hookId = hook->getId();
				side = 3;
			}
		} else {
			double aDist2 = tdistance2(pos, aPos);
			double bDist2 = tdistance2(pos, bPos);
			double dist2 = aDist2;
			int s = 1;
			if (bDist2 < dist2) {
				dist2 = bDist2;
				s = 2;
			}
			if (dist2 < minDist2) {
				minDist2 = dist2;
				hookId = hook->getId();
				side = s;
			}
		}
	}
	double pixelSize = getPixelSize();
	return minDist2 < 100 * pixelSize * pixelSize;
}

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

void HookTool::leftButtonDown(const TPointD &pos, const TMouseEvent &e)
{
	TTool::Application *app = TTool::getApplication();
	if (!app)
		return;

	m_buttonDown = true;
	m_snapped = false;

	TXshLevel *xl = app->getCurrentLevel()->getLevel();
	if (xl && xl->getSimpleLevel())
		m_undo = new HookUndo(xl->getSimpleLevel());
	m_selection.setLevel(xl);
	m_firstPos = m_lastPos = pos;
	m_hookId = -1, m_hookSide = 0;
	m_deselectArmed = false;
	if (pick(m_hookId, m_hookSide, pos)) {
		if (m_hookSide == 3) // ho cliccato su un cerchio-croce
		{
			if (e.isAltPressed()) // con l'alt voglio dividere
			{
				m_selection.selectNone();
				m_selection.select(m_hookId, 2);
			} else if (e.isCtrlPressed()) {
				// se sono tutti e due selezionati li deseleziono
				if (m_selection.isSelected(m_hookId, 1) && m_selection.isSelected(m_hookId, 2)) {
					m_selection.unselect(m_hookId, 1);
					m_selection.unselect(m_hookId, 2);
				} else // altrimenti li seleziono tutti e due
				{
					m_selection.select(m_hookId, 1);
					m_selection.select(m_hookId, 2);
				}
			} else {
				// senza control ne' shift ne' alt: se ho cliccato su un hook non selezionato
				// deseleziono tutti gli altri e lo seleziono, altrimenti lascio tutto
				// com'e' e al buttonup se non c'e' stato movimento deseleziono gli altri
				if (m_selection.isSelected(m_hookId, 1) || m_selection.isSelected(m_hookId, 2))
					m_deselectArmed = true;
				else {
					m_selection.selectNone();
					m_selection.select(m_hookId, 1);
					m_selection.select(m_hookId, 2);
				}
			}
		} else // ho cliccato o su un cerchio o su una croce
		{
			if (e.isCtrlPressed())
				m_selection.invertSelection(m_hookId, m_hookSide);
			else {
				m_selection.selectNone();
				m_selection.select(m_hookId, m_hookSide);
			}
		}
	} else {
		// non ho cliccato su nulla: con ctrl non faccio nulla, senza creo un nuovo hook
		if (!e.isCtrlPressed()) {
			m_selection.selectNone();
			TFrameId fid = getCurrentFid();
			HookSet *hookSet = getHookSet();
			if (hookSet && xl->getSimpleLevel() && !xl->getSimpleLevel()->isReadOnly()) {
				Hook *hook = hookSet->addHook();
				m_hookSetChanged = true;
				if (hook) {
					TPointD ppos(pos);
					if (m_snappedReason != "") {
						m_snapped = true;
						ppos = m_snappedPos;
					}
					m_snappedReason = "";
					hook->setAPos(fid, ppos);
					ppos = hook->getAPos(fid);
					m_selection.select(hook->getId(), 1);
					m_selection.select(hook->getId(), 2);
				}
			}
		}
	}
	m_pivotOffset = TPointD();
	m_selection.makeCurrent();
	invalidate();
}

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

void HookTool::leftButtonDrag(const TPointD &pp, const TMouseEvent &e)
{
	TTool::Application *app = TTool::getApplication();
	if (!app)
		return;

	if (m_snapped)
		return;

	TFrameId fid = getCurrentFid();

	// cerco di capire se sto muovendo un unico hook "unito"
	TPointD hookPos;
	HookSet *hookSet = getHookSet();
	if (!hookSet)
		return;

	bool draggingPivot = false;
	int pivotIndex = getPivotIndex();
	int i, count = 0;
	for (i = 0; i < hookSet->getHookCount(); i++) {
		Hook *hook = hookSet->getHook(i);
		if (!hook || hook->isEmpty())
			continue;
		TPointD aPos = hook->getAPos(fid);
		TPointD bPos = hook->getBPos(fid);
		if (m_selection.isSelected(i, 1) && m_selection.isSelected(i, 2) && aPos == bPos) {
			count++;
			hookPos = aPos;
		} else if (m_selection.isSelected(i, 1) || m_selection.isSelected(i, 2)) {
			count = 0;
			break;
		}
		if (i == pivotIndex && m_selection.isSelected(i, 1))
			draggingPivot = true;
	}

	TPointD pos(pp);
	TPointD delta = pos - m_lastPos;
	if (e.isShiftPressed()) {
		// se e' pigiato lo shift non snappa e si muove solo in orizzontale/verticale
		TPointD d = pos - m_firstPos;
		if (d.x * d.x > d.y * d.y)
			pos.y = m_firstPos.y;
		else
			pos.x = m_firstPos.x;
		delta = pos - m_lastPos;
	} else if (count == 1 && isSnappedActive() && !draggingPivot) {
		// snappa
		TPointD oldHookPos = hookPos;
		hookPos += pos - m_lastPos;
		double range2 = getPixelSize() * 20;
		range2 *= range2;
		m_snappedReason = "";
		m_shapeBBox = TRectD();
		if (snap(hookPos, range2)) {
			delta = hookPos - oldHookPos;
			pos = delta + m_lastPos;
		}
	} else if (count > 1 && isSnappedActive() && !draggingPivot) {
		TPointD oldHookPos = hookPos;
		// delta = pos - m_lastPos;
		TPointD snappedDelta = delta;
		double range2 = getPixelSize() * 20;
		range2 *= range2;
		m_snappedReason = "";
		m_shapeBBox = TRectD();

		for (i = 0; i < hookSet->getHookCount(); i++) {
			Hook *hook = hookSet->getHook(i);
			if (hook && !hook->isEmpty()) {
				if (m_selection.isSelected(i, 1)) {
					TPointD p0 = hook->getAPos(fid);
					TPointD p1 = p0 + delta;
					if (snap(p1, range2))
						snappedDelta = p1 - p0;
				}
				if (m_selection.isSelected(i, 1)) {
					TPointD p0 = hook->getBPos(fid);
					TPointD p1 = p0 + delta;
					if (snap(p1, range2))
						snappedDelta = p1 - p0;
				}
			}
		}

		pos = m_lastPos + snappedDelta;
		delta = snappedDelta;
	}

	m_lastPos = pos;

	TXsheet *xsh = getXsheet();
	//  std::string handle = getXsheet()->getStageObject(TStageObjectId::ColumnId())->getHandle();

	// actual movement
	for (i = 0; i < hookSet->getHookCount(); i++) {
		Hook *hook = hookSet->getHook(i);
		if (!hook || hook->isEmpty())
			continue;

		TPointD aPos = hook->getAPos(fid);
		TPointD bPos = hook->getBPos(fid);
		bool aSelected = m_selection.isSelected(i, 1);
		bool bSelected = m_selection.isSelected(i, 2);
		if (pivotIndex == i) {
			if (aSelected) {
				m_pivotOffset += delta;
				if (!bSelected)
					hook->setBPos(fid, bPos - delta);
			} else if (bSelected)
				hook->setBPos(fid, bPos + delta);
		} else {
			if (aSelected)
				hook->setAPos(fid, aPos + delta);
			if (bSelected)
				hook->setBPos(fid, bPos + delta);
		}
		m_hookSetChanged = true;
	}
	getXsheet()->getStageObjectTree()->invalidateAll();
	invalidate();
}

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

void HookTool::leftButtonUp(const TPointD &pos, const TMouseEvent &)
{
	TTool::Application *app = TTool::getApplication();
	if (!app)
		return;

	// note: apparently sometimes (when the user triple-clicks) we receive this event twice
	if (!m_buttonDown)
		return;
	m_buttonDown = false;

	// if I've moved the pivot hook I have to perform the actual movement in the mouse up event
	int pivotIndex = getPivotIndex();
	if (m_selection.isSelected(pivotIndex, 1) && m_pivotOffset != TPointD()) {
		HookSet *hookSet = getHookSet();
		if (hookSet) {
			Hook *hook = hookSet->getHook(pivotIndex);
			if (hook && !hook->isEmpty()) {
				TFrameId fid = getCurrentFid();
				TPointD aPos = hook->getAPos(fid);
				TPointD bPos = hook->getBPos(fid);
				hook->setAPos(fid, aPos + m_pivotOffset);
				hook->setBPos(fid, bPos + m_pivotOffset);
				getXsheet()->getStageObjectTree()->invalidateAll();
				updateMatrix();
			}
		}
	}

	m_snapped = false;
	// m_selection.selectNone();
	TXshLevel *xl = app->getCurrentLevel()->getLevel();
	if (!xl || !xl->getSimpleLevel())
		return;
	xl->getSimpleLevel()->getProperties()->setDirtyFlag(true);
	TPointD delta = m_lastPos - m_firstPos;
	if (m_deselectArmed && norm2(delta) < 10) {
		m_selection.selectNone();
		m_selection.unselect(m_hookId, 1);
		m_selection.unselect(m_hookId, 2);
	}
	m_deselectArmed = false;
	if (m_undo && m_hookSetChanged)
		TUndoManager::manager()->add(m_undo);
	else {
		delete m_undo;
		m_undo = 0;
	}
	m_hookSetChanged = false;
	m_pivotOffset = TPointD();
}

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

bool HookTool::snap(TPointD &pos, double &range2)
{
	bool ret = false;
	TPointD snappedPos = pos;
	TVectorImageP vi = TImageP(getImage(false));
	TStroke *selectedShape = 0;
	TRectD selectedShapeBBox;
	double selectedShapeBBoxArea = 0;
	int i, n;
	n = vi ? (int)vi->getStrokeCount() : 0;
	for (i = 0; i < n; i++) {
		TStroke *stroke = vi->getStroke(i);
		if (!stroke->isSelfLoop())
			continue;
		TRectD bbox = stroke->getBBox();
		TPointD strokeCenter = 0.5 * (bbox.getP00() + bbox.getP11());
		if (bbox.contains(pos)) {
			double dist2 = norm2(pos - strokeCenter);
			if (dist2 < range2) {
				double bboxArea = bbox.getLx() * bbox.getLy();
				if (selectedShape == 0 || selectedShapeBBoxArea > bboxArea) {
					range2 = dist2;
					selectedShape = stroke;
					selectedShapeBBox = bbox;
					selectedShapeBBoxArea = bboxArea;
				}
			}
		}
	}

	if (selectedShape) {
		m_shapeBBox = selectedShapeBBox;
		snappedPos = 0.5 * (selectedShapeBBox.getP00() + selectedShapeBBox.getP11());
		m_snappedPos = snappedPos;
		m_snappedReason = "shape center";
		ret = true;
	}

	int k = -1;
	if (isEditingScene()) {
		for (i = 0; i < (int)m_otherHooks.size(); i++) {
			double dist2 = norm2(pos - m_otherHooks[i].m_hookPos);
			if (dist2 < range2) {
				range2 = dist2;
				k = i;
			}
		}
	}
	if (k >= 0) {
		m_shapeBBox = TRectD();
		snappedPos = m_otherHooks[k].m_hookPos;
		m_snappedPos = snappedPos;
		m_snappedReason =
			"Col" + toString(m_otherHooks[k].m_columnIndex + 1) + "/" + toString(m_otherHooks[k].m_hookIndex + 1);
		ret = true;
	}
	pos = snappedPos;
	return ret;
}

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

void HookTool::mouseMove(const TPointD &pos, const TMouseEvent &e)
{
	string oldReason = m_snappedReason;
	TPointD oldPos = m_snappedPos;

	m_snappedPos = TPointD();
	m_snappedReason = "";
	m_shapeBBox = TRectD();

	m_otherHooks.clear();
	getOtherHooks(m_otherHooks);

	int hookId, side;
	if (pick(hookId, side, pos)) {
		if (oldReason != "")
			invalidate();
		return;
	}

	if (isSnappedActive()) {
		double range2 = getPixelSize() * 20.0;
		range2 *= range2;
		TPointD snappedPos = pos;
		snap(snappedPos, range2);
	}

	if (m_snappedReason != oldReason || m_snappedPos != oldPos)
		invalidate();
}

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

void HookTool::onActivate()
{
	// TODO: getApplication()->editImageOrSpline();
	m_otherHooks.clear();
	getOtherHooks(m_otherHooks);
	m_selection.makeCurrent();
}

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

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

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

void HookTool::onEnter()
{
	m_selection.makeCurrent();
}