#include "toonzqt/camerasettingswidget.h"

// TnzQt includes
#include "toonzqt/doublefield.h"
#include "toonzqt/intfield.h"
#include "toonzqt/lineedit.h"
#include "toonzqt/checkbox.h"
#include "toonzqt/tselectionhandle.h"
#include "toonzqt/dvdialog.h"

// TnzLib includes
#include "toonz/toonzfolders.h"
#include "toonz/tcamera.h"
#include "toonz/tstageobjecttree.h"
#include "toonz/txshlevelhandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/tscenehandle.h"
#include "toonz/txshlevel.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/txshleveltypes.h"

// TnzCore includes
#include "tconvert.h"
#include "tsystem.h"
#include "tfilepath_io.h"
#include "tutil.h"

// Qt includes
#include <QGridLayout>
#include <QLabel>
#include <QGridLayout>
#include <QRadioButton>
#include <QButtonGroup>
#include <QApplication>
#include <QComboBox>
#include <QMessageBox>
#include <QList>
#include <QStringList>
#include <QRegExp>
#include <QPainter>
#include <QTextStream>
#include <QString>
#include <QStringList>

using namespace std;
using namespace DVGui;

namespace
{

// the first value in the preset list
const QString custom = QObject::tr("<custom>");

/*---小数の余分なゼロを消す---*/
QString removeZeros(QString srcStr)
{
	if (!srcStr.contains('.'))
		return srcStr;

	for (int i = srcStr.length() - 1; i >= 0; i--) {
		if (srcStr.at(i) == '0')
			srcStr.chop(1);
		else if (srcStr.at(i) == '.') {
			srcStr.chop(1);
			break;
		} else
			break;
	}
	return srcStr;
}
} // namespace

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

QValidator::State SimpleExpValidator::validate(QString &input, int &pos) const
{
	/*---使用可能な文字---*/
	QString validChars("0123456789/.");

	int slashCount = 0;

	for (int i = 0; i < input.length(); i++) {
		/*--- まず、使用不可能な文字が含まれている場合はInvalid ---*/
		if (!validChars.contains(input.at(i)))
			return Invalid;
		if (input.at(i) == '/')
			slashCount++;
	}
	/*--- 中身は普通の数字。Doubleに変換可能ならOK ---*/
	if (slashCount == 0) {
		bool ok;
		double tmp = input.toDouble(&ok);
		if (ok)
			return (tmp > 0) ? Acceptable : Intermediate;
		else
			return Intermediate;
	} else if (slashCount >= 2) {
		return Intermediate;
	} else //slashCount == 1
	{
		if (input.at(0) == '/' || input.at(input.length() - 1) == '/')
			return Intermediate;
		else {
			QStringList strList = input.split('/');
			/*--- スラッシュの左右でDoubleに変換できるかチェック。できないとIntermediate。 ---*/
			for (int i = 0; i < strList.size(); i++) {
				QString tmpStr = strList.at(i);
				bool ok;
				double tmp = tmpStr.toDouble(&ok);
				if (!ok)
					return Intermediate;
				if (ok && tmp <= 0)
					return Intermediate;
			}
			/*--- 左右でDoubleに変換できたのでOK ---*/
			return Acceptable;
		}
	}
}

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

SimpleExpField::SimpleExpField(QWidget *parent)
	: QLineEdit(parent)
{
	m_validator = new SimpleExpValidator(this);
	setValidator(m_validator);
}
//--------------------------------------------------------------------------
/*--- 普通に値を入れる ---*/
void SimpleExpField::setValue(double value)
{
	QString str;
	str.setNum(value);
	setText(str);
}
//--------------------------------------------------------------------------
/*--- A/R用 valueがw/hに近ければ "w/h" という文字列を入れる ---*/
void SimpleExpField::setValue(double value, int w, int h)
{
	QString str;
	if (areAlmostEqual(value, (double)w / (double)h, 1e-5))
		str = QString().setNum(w) + "/" + QString().setNum(h);
	else
		str.setNum(value);

	setText(str);
}

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

double SimpleExpField::getValue()
{
	int slashCount = text().count('/');
	if (slashCount == 0)
		return text().toDouble();
	else if (slashCount == 1) {
		QStringList strList = text().split('/');
		return strList.at(0).toDouble() / strList.at(1).toDouble();
	}
	std::cout << "more than one slash!" << std::endl;
	return 0.1;
}

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

void SimpleExpField::focusInEvent(QFocusEvent *event)
{
	m_previousValue = text();
	QLineEdit::focusInEvent(event);
}

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

void SimpleExpField::focusOutEvent(QFocusEvent *event)
{
	int dummy;
	QString tmp = text();
	if (validator()->validate(tmp, dummy) != QValidator::Acceptable)
		setText(m_previousValue);
	QLineEdit::focusOutEvent(event);
}

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

CameraSettingsWidget::CameraSettingsWidget(bool forCleanup)
	: m_forCleanup(forCleanup), m_arValue(0), m_presetListFile(""), m_currentLevel(0)
{
	m_xPrev = new QRadioButton();
	m_yPrev = new QRadioButton();
	m_arPrev = new QRadioButton();
	m_inchPrev = new QRadioButton();
	m_dotPrev = new QRadioButton();

	m_lxFld = new MeasuredDoubleLineEdit();
	m_lyFld = new MeasuredDoubleLineEdit();

	m_arFld = new SimpleExpField(this);

	m_xResFld = new DVGui::IntLineEdit();
	m_yResFld = new DVGui::IntLineEdit();
	m_xDpiFld = new DoubleLineEdit();
	m_yDpiFld = new DoubleLineEdit();

	m_fspChk = new QPushButton("");

	m_useLevelSettingsBtn = new QPushButton(tr("Use Current Level Settings"));

	m_presetListOm = new QComboBox();
	m_addPresetBtn = new QPushButton(tr("Add"));
	m_removePresetBtn = new QPushButton(tr("Remove"));

	//----
	m_useLevelSettingsBtn->setEnabled(false);
	m_useLevelSettingsBtn->setFocusPolicy(Qt::NoFocus);
	m_lxFld->installEventFilter(this);
	m_lyFld->installEventFilter(this);
	m_arFld->installEventFilter(this);
	m_xResFld->installEventFilter(this);
	m_yResFld->installEventFilter(this);
	m_xDpiFld->installEventFilter(this);
	m_yDpiFld->installEventFilter(this);
	m_xResFld->setMinimumWidth(0);
	m_xResFld->setMaximumWidth(QWIDGETSIZE_MAX);
	m_yResFld->setMinimumWidth(0);
	m_yResFld->setMaximumWidth(QWIDGETSIZE_MAX);

	/*--- 表示精度を4桁にする ---*/
	m_lxFld->setDecimals(4);
	m_lyFld->setDecimals(4);

	m_lxFld->setMeasure("camera.lx");
	m_lyFld->setMeasure("camera.ly");
	m_lxFld->setRange(numeric_limits<double>::epsilon(), numeric_limits<double>::infinity());
	m_lyFld->setRange(numeric_limits<double>::epsilon(), numeric_limits<double>::infinity());

	m_xResFld->setRange(1, 10000000);
	m_yResFld->setRange(1, 10000000);

	m_xDpiFld->setRange(1, numeric_limits<double>::infinity());
	m_yDpiFld->setRange(1, numeric_limits<double>::infinity());

	m_fspChk->setFixedSize(20, 20);
	m_fspChk->setCheckable(true);
	m_fspChk->setChecked(true);

	m_fspChk->setToolTip(tr("Force Squared Pixel"));
	m_fspChk->setObjectName("ForceSquaredPixelButton");
	m_addPresetBtn->setObjectName("PushButton_NoPadding");
	m_removePresetBtn->setObjectName("PushButton_NoPadding");

	m_inchPrev->setFixedSize(11, 21);
	m_dotPrev->setFixedSize(11, 21);
	m_inchPrev->setObjectName("CameraSettingsRadioButton_Small");
	m_dotPrev->setObjectName("CameraSettingsRadioButton_Small");

	m_xPrev->setObjectName("CameraSettingsRadioButton");
	m_yPrev->setObjectName("CameraSettingsRadioButton");
	m_arPrev->setObjectName("CameraSettingsRadioButton");

	// radio buttons groups
	QButtonGroup *group;
	group = new QButtonGroup;
	group->addButton(m_xPrev);
	group->addButton(m_yPrev);
	group->addButton(m_arPrev);
	group = new QButtonGroup;
	group->addButton(m_inchPrev);
	group->addButton(m_dotPrev);
	m_arPrev->setChecked(true);
	m_dotPrev->setChecked(true);

	//------ layout

	QVBoxLayout *mainLay = new QVBoxLayout();
	mainLay->setSpacing(3);
	mainLay->setMargin(3);
	{
		QGridLayout *gridLay = new QGridLayout();
		gridLay->setHorizontalSpacing(2);
		gridLay->setVerticalSpacing(3);
		{
			gridLay->addWidget(m_xPrev, 0, 2, Qt::AlignCenter);
			gridLay->addWidget(m_yPrev, 0, 4, Qt::AlignCenter);

			gridLay->addWidget(m_inchPrev, 1, 0, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(new QLabel("Inch"), 1, 1, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(m_lxFld, 1, 2);
			gridLay->addWidget(new QLabel("x"), 1, 3, Qt::AlignCenter);
			gridLay->addWidget(m_lyFld, 1, 4);

			gridLay->addWidget(m_arPrev, 2, 2, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(new QLabel("A/R"), 2, 3, Qt::AlignCenter);
			gridLay->addWidget(m_arFld, 2, 4);

			gridLay->addWidget(m_dotPrev, 3, 0, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(new QLabel("Pixel"), 3, 1, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(m_xResFld, 3, 2);
			gridLay->addWidget(new QLabel("x"), 3, 3, Qt::AlignCenter);
			gridLay->addWidget(m_yResFld, 3, 4);

			gridLay->addWidget(new QLabel("DPI"), 4, 1, Qt::AlignRight | Qt::AlignVCenter);
			gridLay->addWidget(m_xDpiFld, 4, 2);
			gridLay->addWidget(m_fspChk, 4, 3, Qt::AlignCenter);
			gridLay->addWidget(m_yDpiFld, 4, 4);
		}
		gridLay->setColumnStretch(0, 0);
		gridLay->setColumnStretch(1, 0);
		gridLay->setColumnStretch(2, 1);
		gridLay->setColumnStretch(3, 0);
		gridLay->setColumnStretch(4, 1);
		mainLay->addLayout(gridLay);

		mainLay->addWidget(m_useLevelSettingsBtn);

		QHBoxLayout *resListLay = new QHBoxLayout();
		resListLay->setSpacing(3);
		resListLay->setMargin(1);
		{
			resListLay->addWidget(m_presetListOm, 1);
			resListLay->addWidget(m_addPresetBtn, 0);
			resListLay->addWidget(m_removePresetBtn, 0);
		}
		mainLay->addLayout(resListLay);
	}
	setLayout(mainLay);

	// initialize fields
	TCamera camera;
	setFields(&camera);

	// connect events
	bool ret = true;
	ret = ret && connect(m_lxFld, SIGNAL(editingFinished()), SLOT(onLxChanged()));
	ret = ret && connect(m_lyFld, SIGNAL(editingFinished()), SLOT(onLyChanged()));
	ret = ret && connect(m_arFld, SIGNAL(editingFinished()), SLOT(onArChanged()));
	ret = ret && connect(m_xResFld, SIGNAL(editingFinished()), SLOT(onXResChanged()));
	ret = ret && connect(m_yResFld, SIGNAL(editingFinished()), SLOT(onYResChanged()));
	ret = ret && connect(m_xDpiFld, SIGNAL(editingFinished()), SLOT(onXDpiChanged()));
	ret = ret && connect(m_yDpiFld, SIGNAL(editingFinished()), SLOT(onYDpiChanged()));

	ret = ret && connect(m_fspChk, SIGNAL(clicked(bool)), SLOT(onFspChanged(bool)));

	ret = ret && connect(m_xPrev, SIGNAL(toggled(bool)), SLOT(onPrevToggled(bool)));
	ret = ret && connect(m_yPrev, SIGNAL(toggled(bool)), SLOT(onPrevToggled(bool)));
	ret = ret && connect(m_dotPrev, SIGNAL(toggled(bool)), SLOT(onPrevToggled(bool)));
	ret = ret && connect(m_inchPrev, SIGNAL(toggled(bool)), SLOT(onPrevToggled(bool)));

	ret = ret && connect(m_useLevelSettingsBtn, SIGNAL(clicked()), this, SLOT(useLevelSettings()));

	ret = ret && connect(m_presetListOm, SIGNAL(activated(const QString &)),
						 SLOT(onPresetSelected(const QString &)));
	ret = ret && connect(m_addPresetBtn, SIGNAL(clicked()), SLOT(addPreset()));
	ret = ret && connect(m_removePresetBtn, SIGNAL(clicked()), SLOT(removePreset()));

	assert(ret);
}

CameraSettingsWidget::~CameraSettingsWidget()
{
	setCurrentLevel(0);
}

void CameraSettingsWidget::loadPresetList()
{
	if (m_presetListFile == "")
		return;
	m_presetListOm->clear();
	m_presetListOm->addItem(custom);

	QFile file(m_presetListFile);
	if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
		QTextStream in(&file);
		while (!in.atEnd()) {
			QString line = in.readLine().trimmed();
			if (line != "")
				m_presetListOm->addItem(line);
		}
	}
	m_presetListOm->setCurrentIndex(0);
}

void CameraSettingsWidget::savePresetList()
{
	QFile file(m_presetListFile);
	if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
		return;
	QTextStream out(&file);
	int n = m_presetListOm->count();
	for (int i = 1; i < n; i++)
		out << m_presetListOm->itemText(i) << "\n";
}

bool CameraSettingsWidget::parsePresetString(const QString &str, QString &name, int &xres, int &yres, QString &ar)
{
	// str : name, 1024x768, 4/3
	int b;
	b = str.lastIndexOf(",");
	if (b <= 1)
		return false;
	b = str.lastIndexOf(",", b - 1);
	if (b <= 0)
		return false;

	QRegExp rx(" *([0-9]+)x([0-9]+) *, *(\\d*(\\.\\d+)?|\\d+/\\d+) *");
	if (!rx.exactMatch(str.mid(b + 1)))
		return false;

	name = b > 0 ? str.left(b).trimmed() : "";
	xres = rx.cap(1).toInt();
	yres = rx.cap(2).toInt();
	ar = rx.cap(3);
	return true;
}

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

bool CameraSettingsWidget::parsePresetString(const QString &str,
											 QString &name,
											 int &xres,
											 int &yres,
											 double &fx,
											 double &fy,
											 QString &xoffset,
											 QString &yoffset,
											 double &ar,
											 bool forCleanup)
{
	int len = str.length();
	int i = len - 1;
	while (i >= 0 && str[i] == ' ')
		i--;
	int j = i;

	//--- A/R
	while (i >= 0 && '0' <= str[i] && str[i] <= '9')
		i--;
	if (i == len - 1 || i < 0)
		return false;
	if (str[i] == '/' || str[i] == '.') {
		i--;
		int ii = i;
		while (i >= 0 && '0' <= str[i] && str[i] <= '9')
			i--;
		if (i == ii)
			return false;
	}
	ar = aspectRatioStringToValue(str.mid(i + 1, j - i));

	//--- cleanup camera offsets
	if (forCleanup) {
		// yoffset
		while (i >= 0 && str[i] == ' ')
			i--;
		if (i < 0 || str[i] != ',')
			return false;
		i--;
		while (i >= 0 && str[i] == ' ')
			i--;
		j = i;
		while (i >= 0 && str[i] != ',')
			i--;
		if (i < 0)
			return false;
		i++;

		yoffset = str.mid(i + 1, j - i);

		// xoffset
		while (i >= 0 && str[i] == ' ')
			i--;
		if (i < 0 || str[i] != ',')
			return false;
		i--;
		while (i >= 0 && str[i] == ' ')
			i--;
		j = i;
		while (i >= 0 && str[i] != ',')
			i--;
		if (i < 0)
			return false;
		i++;
		xoffset = str.mid(i + 1, j - i);
	}

	//--- camera size
	// fy
	while (i >= 0 && str[i] == ' ')
		i--;
	if (i < 0 || str[i] != ',')
		return false;
	i--;
	while (i >= 0 && str[i] == ' ')
		i--;
	j = i;
	while (i >= 0 && (('0' <= str[i] && str[i] <= '9') || str[i] == '.'))
		i--;
	if (j == i || i < 0)
		return false;
	fy = str.mid(i + 1, j - i).toDouble();
	// fx
	while (i >= 0 && str[i] == ' ')
		i--;
	if (i < 0 || str[i] != 'x')
		return false;
	i--;
	while (i >= 0 && str[i] == ' ')
		i--;
	j = i;
	while (i >= 0 && (('0' <= str[i] && str[i] <= '9') || str[i] == '.'))
		i--;
	if (j == i || i < 0)
		return false;
	fx = str.mid(i + 1, j - i).toDouble();

	// yres
	while (i >= 0 && str[i] == ' ')
		i--;
	if (i < 0 || str[i] != ',')
		return false;
	i--;
	while (i >= 0 && str[i] == ' ')
		i--;
	j = i;
	while (i >= 0 && '0' <= str[i] && str[i] <= '9')
		i--;
	if (j == i || i < 0)
		return false;
	yres = str.mid(i + 1, j - i).toInt();
	// xres
	while (i >= 0 && str[i] == ' ')
		i--;
	if (i < 0 || str[i] != 'x')
		return false;
	i--;
	while (i >= 0 && str[i] == ' ')
		i--;
	j = i;
	while (i >= 0 && '0' <= str[i] && str[i] <= '9')
		i--;
	if (j == i || i < 0)
		return false;
	xres = str.mid(i + 1, j - i).toInt();

	// name
	while (i >= 0 && str[i] == ' ')
		i--;
	if (i >= 0 && str[i] == ',')
		i--;
	if (i < 0)
		return false;

	i++;

	int k = 0;
	while (k < i && str[k] == ' ')
		k++;
	if (k == i)
		return false;
	/*--- 1文字のカメラ名にも対応するため ---*/
	name = str.mid(k, i - k);

	return true;
}

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

void CameraSettingsWidget::setPresetListFile(const TFilePath &fp)
{
	m_presetListFile = QString::fromStdWString(fp.getWideString());
	loadPresetList();
}

bool CameraSettingsWidget::eventFilter(QObject *obj, QEvent *e)
{
	if (e->type() == QEvent::FocusIn) {
		if (m_xPrev->isChecked() && obj == m_lxFld) // x-prev, fld=lx
			m_yPrev->setChecked(true);
		else if (m_yPrev->isChecked() && obj == m_lyFld) // y-prev, fld=ly
			m_xPrev->setChecked(true);
		else if (m_arPrev->isChecked() && obj == m_arFld) // ar-prev, fld=ar
			m_xPrev->setChecked(true);

		if (m_inchPrev->isChecked() && (obj == m_lxFld || obj == m_lyFld || obj == m_arFld)) // inchPrev, fld = lx|ly|ar
			m_dotPrev->setChecked(true);
		else if (m_dotPrev->isChecked() && (obj == m_xResFld || obj == m_yResFld)) // dotPrev, fld = xres|yres
			m_inchPrev->setChecked(true);
	}

	return QObject::eventFilter(obj, e);
}

void CameraSettingsWidget::setCurrentLevel(TXshLevel *xshLevel)
{
	TXshSimpleLevel *sl = xshLevel ? xshLevel->getSimpleLevel() : 0;
	if (sl && sl->getType() == PLI_XSHLEVEL)
		sl = 0;
	if (sl == m_currentLevel)
		return;
	if (sl)
		sl->addRef();
	if (m_currentLevel)
		m_currentLevel->release();
	m_currentLevel = sl;
	m_useLevelSettingsBtn->setEnabled(m_currentLevel != 0);
}

void CameraSettingsWidget::useLevelSettings()
{
	TXshSimpleLevel *sl = m_currentLevel;
	if (!sl)
		return;

	// Build dpi
	TPointD dpi = sl->getDpi(TFrameId::NO_FRAME, 0);

	// Build physical size
	TDimensionD size(0, 0);
	TDimension res = sl->getResolution();
	if (res.lx <= 0 || res.ly <= 0 || dpi.x <= 0 || dpi.y <= 0)
		return;

	size.lx = res.lx / dpi.x;
	size.ly = res.ly / dpi.y;

	TCamera camera;
	getFields(&camera);
	camera.setSize(size);
	camera.setRes(res);
	setFields(&camera);
	emit levelSettingsUsed();
	emit changed();
}

void CameraSettingsWidget::setFields(const TCamera *camera)
{
	TDimensionD sz = camera->getSize();
	TDimension res = camera->getRes();
	m_lxFld->setValue(sz.lx);
	m_lyFld->setValue(sz.ly);

	m_xResFld->setValue(res.lx);
	m_yResFld->setValue(res.ly);

	setArFld(sz.lx / sz.ly);

	m_xDpiFld->setValue(res.lx / sz.lx);
	m_yDpiFld->setValue(res.ly / sz.ly);
	updatePresetListOm();
}

void CameraSettingsWidget::getFields(TCamera *camera)
{
	camera->setSize(getSize());
	camera->setRes(getRes());
}

TDimensionD CameraSettingsWidget::getSize() const
{
	double lx = m_lxFld->getValue();
	double ly = m_lyFld->getValue();
	return TDimensionD(lx, ly);
}

TDimension CameraSettingsWidget::getRes() const
{
	int xRes = (int)(m_xResFld->getValue());
	int yRes = (int)(m_yResFld->getValue());
	return TDimension(xRes, yRes);
}

void CameraSettingsWidget::updatePresetListOm()
{
	if (m_presetListOm->currentIndex() == 0)
		return;
	bool match = false;
	int xres, yres;
	QString name, arStr;

	double fx, fy;
	QString xoffset, yoffset;
	double ar;

	if (parsePresetString(m_presetListOm->currentText(),
						  name,
						  xres,
						  yres,
						  fx,
						  fy,
						  xoffset,
						  yoffset,
						  ar,
						  m_forCleanup)) {
		double eps = 1.0e-6;
		if (m_forCleanup && m_offsX && m_offsY) {
			match = xres == m_xResFld->getValue() &&
					yres == m_yResFld->getValue() &&
					fx == m_lxFld->getValue() &&
					fy == m_lyFld->getValue() &&
					xoffset == m_offsX->text() &&
					yoffset == m_offsY->text();
		} else {
			match = xres == m_xResFld->getValue() &&
					yres == m_yResFld->getValue() &&
					fx == m_lxFld->getValue() &&
					fy == m_lyFld->getValue();
		}
	}
	if (!match)
		m_presetListOm->setCurrentIndex(0);
}

// ly,ar => lx
void CameraSettingsWidget::hComputeLx()
{
	m_lxFld->setValue(m_lyFld->getValue() * m_arValue);
}

// lx,ar => ly
void CameraSettingsWidget::hComputeLy()
{
	if (m_arValue == 0.0)
		return; // non dovrebbe mai succedere
	m_lyFld->setValue(m_lxFld->getValue() / m_arValue);
}

// lx,ly => ar
void CameraSettingsWidget::computeAr()
{
	if (m_lyFld->getValue() == 0.0)
		return; // non dovrebbe mai succedere
	setArFld(m_lxFld->getValue() / m_lyFld->getValue());
}

// xres,xdpi => lx
void CameraSettingsWidget::vComputeLx()
{
	if (m_xDpiFld->getValue() == 0.0)
		return; // non dovrebbe mai succedere
	m_lxFld->setValue(m_xResFld->getValue() / m_xDpiFld->getValue());
}

// yres,ydpi => ly
void CameraSettingsWidget::vComputeLy()
{
	if (m_yDpiFld->getValue() == 0.0)
		return; // non dovrebbe mai succedere
	m_lyFld->setValue(m_yResFld->getValue() / m_yDpiFld->getValue());
}

// lx,xdpi => xres
void CameraSettingsWidget::computeXRes()
{
	m_xResFld->setValue(tround(m_lxFld->getValue() * m_xDpiFld->getValue()));
}

// ly,ydpi => yres
void CameraSettingsWidget::computeYRes()
{
	m_yResFld->setValue(tround(m_lyFld->getValue() * m_yDpiFld->getValue()));
}

// lx,xres => xdpi
void CameraSettingsWidget::computeXDpi()
{
	if (m_lxFld->getValue() == 0.0)
		return; // non dovrebbe mai succedere
	m_xDpiFld->setValue(m_xResFld->getValue() / m_lxFld->getValue());
}

// ly,yres => ydpi
void CameraSettingsWidget::computeYDpi()
{
	if (m_lyFld->getValue() == 0.0)
		return; // non dovrebbe mai succedere
	m_yDpiFld->setValue(m_yResFld->getValue() / m_lyFld->getValue());
}

// set A/R field, assign m_arValue and compute a nice string representation for the value (e.g. "4/3" instead of 1.3333333)
void CameraSettingsWidget::setArFld(double ar)
{
	m_arValue = ar;
	/*---ピクセルサイズのW/Hの値に近かったら"W/H"と表示する---*/
	m_arFld->setValue(ar, (int)m_xResFld->getValue(), (int)m_yResFld->getValue());
}

// compute res or dpi according to the prevalence
void CameraSettingsWidget::computeResOrDpi()
{
	computeXRes();
	computeYRes();
}

void CameraSettingsWidget::onLxChanged()
{
	assert(!m_inchPrev->isChecked());
	//assert(!(m_fspChk->isChecked() && m_yPrev->isChecked() && m_dotPrev->isChecked()));
	if (m_yPrev->isChecked())
		computeAr();
	else
		hComputeLy();
	computeResOrDpi();
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onLyChanged()
{
	assert(!m_inchPrev->isChecked());
	//assert(!(m_fspChk->isChecked() && m_xPrev->isChecked() && m_dotPrev->isChecked()));
	if (m_xPrev->isChecked())
		computeAr();
	else
		hComputeLx();
	computeResOrDpi();
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onArChanged()
{
	m_arValue = aspectRatioStringToValue(m_arFld->text());
	if (m_xPrev->isChecked())
		hComputeLy();
	else
		hComputeLx();
	computeResOrDpi();
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onXResChanged()
{
	vComputeLx();
	if (m_yPrev->isChecked())
		computeAr();
	else {
		hComputeLy();
		computeYRes();
	}
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onYResChanged()
{
	vComputeLy();
	if (m_xPrev->isChecked())
		computeAr();
	else {
		hComputeLx();
		computeXRes();
	}
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onXDpiChanged()
{
	if (m_fspChk->isChecked())
		m_yDpiFld->setValue(m_xDpiFld->getValue());

	if (m_dotPrev->isChecked()) {
		vComputeLx();
		if (m_arPrev->isChecked()) {
			hComputeLy();
			if (!m_fspChk->isChecked())
				computeYDpi();
		} else
			computeAr();
	} else {
		computeXRes();
		computeYRes();
	}
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onYDpiChanged()
{
	if (m_fspChk->isChecked())
		m_xDpiFld->setValue(m_yDpiFld->getValue());

	if (m_dotPrev->isChecked()) {
		vComputeLy();
		if (m_arPrev->isChecked()) {
			hComputeLx();
			if (!m_fspChk->isChecked())
				computeXDpi();
		} else
			computeAr();
	} else {
		computeXRes();
		computeYRes();
	}
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onFspChanged(bool checked)
{
	if (m_fspChk->isChecked()) {
		if (m_xPrev->isChecked())
			m_yDpiFld->setValue(m_xDpiFld->getValue());
		else
			m_xDpiFld->setValue(m_yDpiFld->getValue());
		if (m_dotPrev->isChecked()) {
			vComputeLx();
			vComputeLy();
			computeAr();
		} else {
			computeXRes();
			computeYRes();
		}
	}
	updatePresetListOm();
	emit changed();
}

void CameraSettingsWidget::onPrevToggled(bool checked)
{
	/*---Prevalences が変わっても ForceSquaredPixelオプションには影響しない---*/
}

void CameraSettingsWidget::onPresetSelected(const QString &str)
{
	if (str == custom || str.isEmpty())
		return;
	QString name, arStr;
	int xres = 0, yres = 0;
	double fx, fy;
	QString xoffset, yoffset;
	double ar;

	if (parsePresetString(str,
						  name,
						  xres,
						  yres,
						  fx,
						  fy,
						  xoffset,
						  yoffset,
						  ar,
						  m_forCleanup)) {
		m_xResFld->setValue(xres);
		m_yResFld->setValue(yres);

		m_lxFld->setValue(fx);
		m_lyFld->setValue(fy);
		m_arFld->setValue(ar, tround(xres), tround(yres));
		m_arValue = ar;

		if (m_forCleanup && m_offsX && m_offsY) {
			m_offsX->setText(xoffset);
			m_offsY->setText(yoffset);
			m_offsX->postSetText(); //calls onEditingFinished()
			m_offsY->postSetText(); //calls onEditingFinished()
		}

		/*--- DPI以外はロードしたままの値を使う ---*/
		computeXDpi();
		computeYDpi();

		if (!areAlmostEqual(fx, m_arValue * fy) && m_fspChk->isChecked())
			m_fspChk->setChecked(false);
		emit changed();
	} else {
		QMessageBox::warning(this, tr("Bad camera preset"),
							 tr("'%1' doesn't seem a well formed camera preset. \n"
								"Possibly the preset file has been corrupted")
								 .arg(str));
	}
}

void CameraSettingsWidget::addPreset()
{
	int xRes = (int)(m_xResFld->getValue());
	int yRes = (int)(m_yResFld->getValue());
	double lx = m_lxFld->getValue();
	double ly = m_lyFld->getValue();
	double ar = m_arFld->getValue();

	QString presetString;
	/*--- Cleanupカメラの場合はオフセットも格納 ---*/
	if (m_forCleanup) {
		QString xoffset = (m_offsX) ? m_offsX->text() : QString("0");
		QString yoffset = (m_offsY) ? m_offsY->text() : QString("0");

		presetString = QString::number(xRes) + "x" + QString::number(yRes) + ", " +
					   removeZeros(QString::number(lx)) + "x" + removeZeros(QString::number(ly)) + ", " +
					   xoffset + ", " + yoffset + ", " +
					   aspectRatioValueToString(ar);
	} else {
		presetString = QString::number(xRes) + "x" + QString::number(yRes) + ", " +
					   removeZeros(QString::number(lx)) + "x" + removeZeros(QString::number(ly)) + ", " +
					   aspectRatioValueToString(ar);
	}

	bool ok;
	QString qs = DVGui::getText(
		tr("Preset name"),
		tr("Enter the name for %1").arg(presetString),
		"", &ok);

	if (!ok)
		return;

	int oldn = m_presetListOm->count();
	m_presetListOm->addItem(qs + "," + presetString);
	int newn = m_presetListOm->count();
	m_presetListOm->blockSignals(true);
	m_presetListOm->setCurrentIndex(m_presetListOm->count() - 1);
	m_presetListOm->blockSignals(false);

	savePresetList();
}

void CameraSettingsWidget::removePreset()
{
	int index = m_presetListOm->currentIndex();
	if (index <= 0)
		return;

	// confirmation dialog
	int ret = DVGui::MsgBox(QObject::tr("Deleting \"%1\".\nAre you sure?").arg(m_presetListOm->currentText()),
					 QObject::tr("Delete"), QObject::tr("Cancel"));
	if (ret == 0 || ret == 2)
		return;

	m_presetListOm->removeItem(index);
	m_presetListOm->setCurrentIndex(0);
	savePresetList();
}

// A/R : value => string (e.g. '4/3' or '1.23')
double CameraSettingsWidget::aspectRatioStringToValue(const QString &s)
{
	if (s == "") {
		return 1;
	}
	int i = s.indexOf("/");
	if (i <= 0 || i + 1 >= s.length())
		return s.toDouble();
	int num = s.left(i).toInt();
	int den = s.mid(i + 1).toInt();
	if (den <= 0)
		den = 1;
	return (double)num / (double)den;
}

// A/R : value => string (e.g. '4/3' or '1.23')
/*---カメラの縦横ピクセル値を入力できるようにし、valueがX/Yの値に近かったら、"X/Y"と表示する---*/
QString CameraSettingsWidget::aspectRatioValueToString(double value, int width, int height)
{
	double v = value;

	if (width != 0 && height != 0) {
		if (areAlmostEqual(value, (double)width / (double)height, 1e-3)) /*-- 誤差3桁 --*/
			return QString("%1/%2").arg(width).arg(height);
	}

	double iv = tround(v);
	if (fabs(iv - v) > 0.01) {
		for (int d = 2; d < 20; d++) {
			int n = tround(v * d);
			if (fabs(n - v * d) <= 0.01)
				return QString::number(n) + "/" + QString::number(d);
		}
		return QString::number(value, 'f', 5);
	} else {
		return QString::number((int)iv);
	}
}