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Toshihiro Shimizu 890ddd
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#include "toonzqt/intpairfield.h"
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#include "toonzqt/dvdialog.h"
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#include "tcommon.h"
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#include <qlabel></qlabel>
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#include <qpainter></qpainter>
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#include <qmouseevent></qmouseevent>
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#include <qslider></qslider>
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#include <qhboxlayout></qhboxlayout>
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using namespace DVGui;
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#ifdef MACOSX
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#define MARGIN_OFFSET 7
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#else
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#define MARGIN_OFFSET 2
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#endif
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//=============================================================================
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// IntPairField
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//-----------------------------------------------------------------------------
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IntPairField::IntPairField(QWidget *parent, bool isMaxRangeLimited)
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    : QWidget(parent)
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    , m_values(0, 0)
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    , m_minValue(0)
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    , m_maxValue(100)
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    , m_grabOffset(0)
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    , m_grabIndex(-1)
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    , m_leftMargin(52)
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    , m_rightMargin(52)
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    , m_isMaxRangeLimited(isMaxRangeLimited)
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    , m_isLinear(true) {
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  setObjectName("IntPairField");
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  setFixedHeight(WidgetHeight);
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  m_leftLabel    = new QLabel("", this);
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  m_leftLineEdit = new DVGui::IntLineEdit(this);
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  m_rightLabel    = new QLabel("", this);
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  m_rightLineEdit = new DVGui::IntLineEdit(this);
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  m_leftLineEdit->setFixedWidth(40);
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  m_rightLineEdit->setFixedWidth(40);
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  //----layout
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  QHBoxLayout *m_mainLayout = new QHBoxLayout;
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  m_mainLayout->setMargin(0);
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  m_mainLayout->setSpacing(5);
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  {
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    m_mainLayout->addWidget(m_leftLabel, 1);
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    m_mainLayout->addWidget(m_leftLineEdit, 1, Qt::AlignLeft);
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    m_mainLayout->addSpacing(35);
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    m_mainLayout->addStretch(100);
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    m_mainLayout->addWidget(m_rightLabel, 1);
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    m_mainLayout->addWidget(m_rightLineEdit, 1, Qt::AlignRight);
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  }
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  setLayout(m_mainLayout);
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  //---signal-slot connections
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  bool ret = connect(m_leftLineEdit, SIGNAL(editingFinished()),
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                     SLOT(onLeftEditingFinished()));
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  ret      = ret && connect(m_rightLineEdit, SIGNAL(editingFinished()),
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                            SLOT(onRightEditingFinished()));
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  assert(ret);
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}
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//-----------------------------------------------------------------------------
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int IntPairField::pos2value(int x) const {
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  int xMin = m_leftMargin, xMax = width() - m_rightMargin - 1;
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  if (m_isLinear)
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    return m_minValue + (m_maxValue - m_minValue) * (x - xMin) / (xMax - xMin);
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  // nonlinear slider case
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  double posRatio = (double)(x - xMin) / (double)(xMax - xMin);
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  double t;
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  if (posRatio <= 0.5)
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    t = 0.04 * posRatio;
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  else if (posRatio <= 0.75)
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    t = -0.02 + 0.08 * posRatio;
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  else if (posRatio <= 0.9)
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    t = -0.26 + 0.4 * posRatio;
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  else
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    t = -8.0 + 9.0 * posRatio;
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  return m_minValue + (int)((double)(m_maxValue - m_minValue) * t);
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}
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//-----------------------------------------------------------------------------
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int IntPairField::value2pos(int v) const {
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  int xMin = m_leftMargin, xMax = width() - m_rightMargin - 1;
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  if (m_isLinear)
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    return xMin +
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           ((xMax - xMin) * (v - m_minValue)) / (m_maxValue - m_minValue);
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  // nonlinear slider case
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  double valueRatio =
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      (double)(v - m_minValue) / (double)(m_maxValue - m_minValue);
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  double t;
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  if (valueRatio <= 0.02)
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    t = valueRatio / 0.04;
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  else if (valueRatio <= 0.04)
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    t = (valueRatio + 0.02) / 0.08;
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  else if (valueRatio <= 0.1)
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    t = (valueRatio + 0.26) / 0.4;
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  else
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    t = (valueRatio + 8.0) / 9.0;
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  return xMin + (int)(t * (double)(xMax - xMin));
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}
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//-----------------------------------------------------------------------------
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void IntPairField::paintEvent(QPaintEvent *) {
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  QPainter p(this);
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  p.setBrush(Qt::NoBrush);
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  int x0 = value2pos(m_minValue);
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  int x1 = value2pos(m_maxValue);
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  int y  = height() / 2;
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  p.setPen(QPen(getDarkLineColor(), 4));
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  p.drawLine(x0 - 1, y, x1, y);
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  p.setPen(Qt::black);
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  int y1 = height() - 1;
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  int x;
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  x                = value2pos(m_values.first);
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  QRect sliderRect = QRect(x0, -5, x1 - x0 + 1, 10);
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  if (sliderRect.contains(QPoint(x, 0)))
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    p.drawPixmap(x - m_handleLeftPixmap.width() + 1, 2, m_handleLeftPixmap);
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  else
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    p.drawPixmap(sliderRect.right() - m_handleLeftPixmap.width() + 1, 2,
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                 m_handleLeftGrayPixmap);
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  x = value2pos(m_values.second);
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  if (sliderRect.contains(QPoint(x, 0)))
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    p.drawPixmap(x, 2, m_handleRightPixmap);
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  else
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    p.drawPixmap(sliderRect.right(), 2, m_handleRightGrayPixmap);
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setLeftText(const QString &text) {
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  QPoint pos       = m_leftLabel->pos();
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  QString oldText  = m_leftLabel->text();
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  int oldLabelSize = fontMetrics().horizontalAdvance(oldText);
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  int newLabelSize = fontMetrics().horizontalAdvance(text);
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  int labelSize    = newLabelSize - oldLabelSize;
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  m_leftMargin += labelSize + MARGIN_OFFSET;
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  m_leftLabel->setText(text);
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  update();
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setRightText(const QString &text) {
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  QString oldText  = m_rightLabel->text();
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  int oldLabelSize = fontMetrics().horizontalAdvance(oldText);
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  int newLabelSize = fontMetrics().horizontalAdvance(text);
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  int labelSize    = newLabelSize - oldLabelSize;
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  m_rightMargin += labelSize + MARGIN_OFFSET;
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  m_rightLabel->setText(text);
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  update();
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setLabelsEnabled(bool enable) {
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  if (!enable) {
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    m_rightLabel->hide();
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    m_leftLabel->hide();
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  } else {
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    m_rightLabel->show();
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    m_leftLabel->show();
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  }
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setValue(int value) {
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  value = tcrop(value, m_minValue, m_maxValue);
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  value = tround(value * 100) * 0.01;
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  if (m_grabIndex == 0)  // Left grab
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  {
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    m_values.first = value;
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    m_leftLineEdit->setValue(m_values.first);
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    if (value > m_values.second) {
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      m_values.second = value;
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      m_rightLineEdit->setValue(m_values.second);
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    }
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  } else  // Right grab
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  {
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    m_values.second = value;
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    m_rightLineEdit->setValue(m_values.second);
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    if (value < m_values.first) {
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      m_values.first = value;
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      m_leftLineEdit->setValue(m_values.first);
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    }
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  }
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setValues(const std::pair<int, int=""> &values) {</int,>
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  assert(values.first <= values.second);
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  m_values.first = tcrop(values.first, m_minValue, m_maxValue);
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  m_leftLineEdit->setValue(m_values.first);
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  m_values.second = values.second;
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  if (m_isMaxRangeLimited)
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    m_values.second = tcrop(values.second, m_values.first, m_maxValue);
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  m_rightLineEdit->setValue(m_values.second);
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  update();
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}
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//-----------------------------------------------------------------------------
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void IntPairField::setRange(int minValue, int maxValue) {
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  m_minValue = minValue;
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  m_maxValue = maxValue;
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  if (!m_isMaxRangeLimited) maxValue = (std::numeric_limits<int>::max)();</int>
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  m_leftLineEdit->setRange(minValue, maxValue);
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  m_rightLineEdit->setRange(minValue, maxValue);
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  update();
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}
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//-----------------------------------------------------------------------------
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void IntPairField::getRange(int &minValue, int &maxValue) {
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  minValue = m_minValue;
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  maxValue = m_maxValue;
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}
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//-----------------------------------------------------------------------------
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void IntPairField::mousePressEvent(QMouseEvent *event) {
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  if (event->button() == Qt::LeftButton) {
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    int x = event->pos().x();
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    int cur0, cur1;
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    if (m_values.first > m_maxValue)
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      cur0 = value2pos(m_maxValue) - 5;
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    else
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      cur0 = value2pos(m_values.first);
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    if (m_values.second > m_maxValue)
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      cur1 = value2pos(m_maxValue);
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    else
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      cur1 = value2pos(m_values.second);
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    int d0 = abs(cur0 - x);
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    int d1 = abs(cur1 - x);
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    int d, cur;
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    if (d0 < d1 || (d0 == d1 && x < cur0)) {
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      d           = d0;
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      cur         = cur0;
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      m_grabIndex = 0;
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    } else {
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      d           = d1;
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      cur         = cur1;
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      m_grabIndex = 1;
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    }
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    if (d < 6)
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      m_grabOffset = cur - x;
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    else {
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      m_grabOffset = 0;
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      setValue(pos2value(x));
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      emit valuesChanged(true);
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      update();
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    }
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  }
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}
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//-----------------------------------------------------------------------------
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void IntPairField::mouseMoveEvent(QMouseEvent *event) {
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  if (event->buttons()) {
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    std::pair<int, int=""> oldValues = m_values;</int,>
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    int x                         = event->pos().x() + m_grabOffset;
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    setValue(pos2value(x));
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    if (oldValues == m_values) return;
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    emit valuesChanged(true);
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    update();
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  }
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}
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//-----------------------------------------------------------------------------
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void IntPairField::mouseReleaseEvent(QMouseEvent *event) {
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  m_grabOffset = 0;
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  m_grabIndex  = 0;
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  emit valuesChanged(false);
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}
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//-----------------------------------------------------------------------------
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void IntPairField::onLeftEditingFinished() {
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  int value = m_leftLineEdit->getValue();
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  if (value == m_values.first) return;
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  if (!m_isMaxRangeLimited && value < m_minValue)
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    value = m_minValue;
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  else if (m_isMaxRangeLimited)
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    value = tcrop(value, m_minValue, m_maxValue);
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  m_values.first = value;
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  if (m_values.first > m_values.second) {
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    m_values.second = m_values.first;
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    m_rightLineEdit->setValue(m_values.second);
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  }
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  emit valuesChanged(false);
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  update();
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}
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//-----------------------------------------------------------------------------
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void IntPairField::onRightEditingFinished() {
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  int value = m_rightLineEdit->getValue();
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  if (value == m_values.second) return;
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  if (m_isMaxRangeLimited) value = tcrop(value, m_minValue, m_maxValue);
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  m_values.second = value;
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  if (m_values.second < m_values.first) {
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    m_values.first = m_values.second;
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    m_leftLineEdit->setValue(m_values.first);
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  }
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  emit valuesChanged(false);
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  update();
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}