#include "toonzqt/intpairfield.h"

#include "toonzqt/dvdialog.h"

#include "tcommon.h"

#include <qlabel></qlabel>

#include <qpainter></qpainter>

#include <qmouseevent></qmouseevent>

#include <qslider></qslider>

#include <qhboxlayout></qhboxlayout>

using namespace DVGui;

#ifdef MACOSX

#define MARGIN_OFFSET 7

#else

#define MARGIN_OFFSET 2

#endif

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

// IntPairField

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

IntPairField::IntPairField(QWidget *parent, bool isMaxRangeLimited)

	: QWidget(parent), m_values(0, 0), m_minValue(0), m_maxValue(100), m_grabOffset(0), m_grabIndex(-1), m_leftMargin(52), m_rightMargin(52), m_isMaxRangeLimited(isMaxRangeLimited)

{

	setObjectName("IntPairField");

	setFixedHeight(WidgetHeight);

	m_leftLabel = new QLabel("", this);

	m_leftLineEdit = new DVGui::IntLineEdit(this);

	m_rightLabel = new QLabel("", this);

	m_rightLineEdit = new DVGui::IntLineEdit(this);

	m_leftLineEdit->setFixedWidth(40);

	m_rightLineEdit->setFixedWidth(40);

	//----layout

	QHBoxLayout *m_mainLayout = new QHBoxLayout;

	m_mainLayout->setMargin(0);

	m_mainLayout->setSpacing(5);

	{

		m_mainLayout->addWidget(m_leftLabel, 1);

		m_mainLayout->addWidget(m_leftLineEdit, 1, Qt::AlignLeft);

		m_mainLayout->addSpacing(35);

		m_mainLayout->addStretch(100);

		m_mainLayout->addWidget(m_rightLabel, 1);

		m_mainLayout->addWidget(m_rightLineEdit, 1, Qt::AlignRight);

	}

	setLayout(m_mainLayout);

	//---signal-slot connections

	bool ret = connect(m_leftLineEdit, SIGNAL(editingFinished()), SLOT(onLeftEditingFinished()));

	ret = ret && connect(m_rightLineEdit, SIGNAL(editingFinished()), SLOT(onRightEditingFinished()));

	assert(ret);

}

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

double IntPairField::pos2value(int x) const

{

	int xMin = m_leftMargin, xMax = width() - m_rightMargin - 1;

	return m_minValue + (m_maxValue - m_minValue) * (x - xMin) / (xMax - xMin);

}

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

int IntPairField::value2pos(double v) const

{

	int xMin = m_leftMargin, xMax = width() - m_rightMargin - 1;

	return xMin + (int)(((xMax - xMin) * (v - m_minValue)) / (m_maxValue - m_minValue));

}

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

void IntPairField::paintEvent(QPaintEvent *)

{

	QPainter p(this);

	p.setBrush(Qt::NoBrush);

	int x0 = value2pos(m_minValue);

	int x1 = value2pos(m_maxValue);

	int y = height() / 2;

	p.setPen(getLightLineColor());

	p.drawLine(x0 - 1, y, x1 + 1, y);

	p.drawPoint(x1 + 1, y - 1);

	p.drawPoint(x1 + 1, y - 2);

	p.drawPoint(x1 + 1, y - 3);

	p.setPen(QColor(0, 0, 0));

	p.drawLine(x0, y - 2, x1 - 1, y - 2);

	p.setPen(getDarkLineColor());

	p.drawLine(x0 - 1, y - 3, x1, y - 3);

	p.drawPoint(x0 - 1, y - 1);

	p.drawPoint(x0 - 1, y - 2);

	p.setPen(Qt::black);

	int y1 = height() - 1;

	int x;

	x = value2pos(m_values.first);

	QRect sliderRect = QRect(x0, -5, x1 - x0 + 1, 10);

	if (sliderRect.contains(QPoint(x, 0)))

		p.drawPixmap(x - m_handleLeftPixmap.width() + 1, 2, m_handleLeftPixmap);

	else

		p.drawPixmap(sliderRect.right() - m_handleLeftPixmap.width() + 1, 2, m_handleLeftGrayPixmap);

	x = value2pos(m_values.second);

	if (sliderRect.contains(QPoint(x, 0)))

		p.drawPixmap(x, 2, m_handleRightPixmap);

	else

		p.drawPixmap(sliderRect.right(), 2, m_handleRightGrayPixmap);

}

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

void IntPairField::setLeftText(const QString &text)

{

	QPoint pos = m_leftLabel->pos();

	QString oldText = m_leftLabel->text();

	int oldLabelSize = fontMetrics().width(oldText);

	int newLabelSize = fontMetrics().width(text);

	int labelSize = newLabelSize - oldLabelSize;

	m_leftMargin += labelSize + MARGIN_OFFSET;

	m_leftLabel->setText(text);

	update();

}

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

void IntPairField::setRightText(const QString &text)

{

	QString oldText = m_rightLabel->text();

	int oldLabelSize = fontMetrics().width(oldText);

	int newLabelSize = fontMetrics().width(text);

	int labelSize = newLabelSize - oldLabelSize;

	m_rightMargin += labelSize + MARGIN_OFFSET;

	m_rightLabel->setText(text);

	update();

}

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

void IntPairField::setLabelsEnabled(bool enable)

{

	if (!enable) {

		m_rightLabel->hide();

		m_leftLabel->hide();

	} else {

		m_rightLabel->show();

		m_leftLabel->show();

	}

}

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

void IntPairField::setValue(int value)

{

	value = tcrop(value, m_minValue, m_maxValue);

	value = tround(value * 100) * 0.01;

	if (m_grabIndex == 0) //Left grab

	{

		m_values.first = value;

		m_leftLineEdit->setValue(m_values.first);

		if (value > m_values.second) {

			m_values.second = value;

			m_rightLineEdit->setValue(m_values.second);

		}

	} else //Right grab

	{

		m_values.second = value;

		m_rightLineEdit->setValue(m_values.second);

		if (value < m_values.first) {

			m_values.first = value;

			m_leftLineEdit->setValue(m_values.first);

		}

	}

}

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

void IntPairField::setValues(const std::pair<int, int=""> &values)</int,>

{

	assert(values.first <= values.second);

	m_values.first = tcrop(values.first, m_minValue, m_maxValue);

	m_leftLineEdit->setValue(m_values.first);

	m_values.second = values.second;

	if (m_isMaxRangeLimited)

		m_values.second = tcrop(values.second, m_values.first, m_maxValue);

	m_rightLineEdit->setValue(m_values.second);

	update();

}

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

void IntPairField::setRange(int minValue, int maxValue)

{

	m_minValue = minValue;

	m_maxValue = maxValue;

	if (!m_isMaxRangeLimited)

		maxValue = (std::numeric_limits<int>::max)();</int>

	m_leftLineEdit->setRange(minValue, maxValue);

	m_rightLineEdit->setRange(minValue, maxValue);

	update();

}

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

void IntPairField::getRange(int &minValue, int &maxValue)

{

	minValue = m_minValue;

	maxValue = m_maxValue;

}

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

void IntPairField::mousePressEvent(QMouseEvent *event)

{

	if (event->button() == Qt::LeftButton) {

		int x = event->pos().x();

		int cur0, cur1;

		if (m_values.first > m_maxValue)

			cur0 = value2pos(m_maxValue) - 5;

		else

			cur0 = value2pos(m_values.first);

		if (m_values.second > m_maxValue)

			cur1 = value2pos(m_maxValue);

		else

			cur1 = value2pos(m_values.second);

		int d0 = abs(cur0 - x);

		int d1 = abs(cur1 - x);

		int d, cur;

		if (d0 < d1 || (d0 == d1 && x < cur0)) {

			d = d0;

			cur = cur0;

			m_grabIndex = 0;

		} else {

			d = d1;

			cur = cur1;

			m_grabIndex = 1;

		}

		if (d < 6)

			m_grabOffset = cur - x;

		else {

			m_grabOffset = 0;

			setValue(pos2value(x));

			emit valuesChanged(true);

			update();

		}

	}

}

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

void IntPairField::mouseMoveEvent(QMouseEvent *event)

{

	if (event->buttons()) {

		std::pair<int, int=""> oldValues = m_values;</int,>

		int x = event->pos().x() + m_grabOffset;

		setValue(pos2value(x));

		if (oldValues == m_values)

			return;

		emit valuesChanged(true);

		update();

	}

}

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

void IntPairField::mouseReleaseEvent(QMouseEvent *event)

{

	m_grabOffset = 0;

	m_grabIndex = 0;

	emit valuesChanged(false);

}

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

void IntPairField::onLeftEditingFinished()

{

	int value = m_leftLineEdit->getValue();

	if (value == m_values.first)

		return;

	if (!m_isMaxRangeLimited && value < m_minValue)

		value = m_minValue;

	else if (m_isMaxRangeLimited)

		value = tcrop(value, m_minValue, m_maxValue);

	m_values.first = value;

	if (m_values.first > m_values.second) {

		m_values.second = m_values.first;

		m_rightLineEdit->setValue(m_values.second);

	}

	emit valuesChanged(false);

	update();

}

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

void IntPairField::onRightEditingFinished()

{

	int value = m_rightLineEdit->getValue();

	if (value == m_values.second)

		return;

	if (m_isMaxRangeLimited)

		value = tcrop(value, m_minValue, m_maxValue);

	m_values.second = value;

	if (m_values.second < m_values.first) {

		m_values.first = m_values.second;

		m_leftLineEdit->setValue(m_values.first);

	}

	emit valuesChanged(false);

	update();

}