#include "lts_date_time_edit_p.h"

#include <QApplication>
#include <QRegularExpression>
#include <QValidator>
#include <QKeyEvent>


namespace LtsWidgets
{




void LineEdit::clear()
{
  setStyleSheet(QString());
  QLineEdit::clear();
}

bool LineEdit::isEmpty() const
{
  return text().isEmpty();
}

void LineEdit::keyPressEvent(QKeyEvent *event)
{
  const bool wasEmpty = isEmpty();
  QLineEdit::keyPressEvent(event);
  int keyCode = event->key();
  if (keyCode == Qt::Key_Backspace && wasEmpty)
  {
    emit focusOutBackspace();
    focusPreviousChild();
    event->accept();
  }
}

void LineEdit::contextMenuEvent(QContextMenuEvent *e)
{
  Q_UNUSED(e);
  
}

void LineEdit::focusOutEvent(QFocusEvent *event)
{
  QLineEdit::focusOutEvent(event);
  emit focusOut();
}




DigitsLineEdit::DigitsLineEdit(QWidget *parent)
  : LineEdit(parent)
{
  setAlignment(Qt::AlignRight);
  QRegularExpression rx(QLatin1String("[-]{0,1}[0-9 ]*"));
  setValidator(new QRegularExpressionValidator(rx, this));
}

void DigitsLineEdit::setExactNumDigits(int num)
{
  m_exactNumDigits = num;

  QRegularExpression rx(QString::asprintf("^[0-9 ]{%d}$", num));
  setValidator(new QRegularExpressionValidator(rx, this));
}

void DigitsLineEdit::setValue(int val)
{
  QString str;

  if (m_exactNumDigits == -1)
    str.setNum(val);
  else
    str = QStringLiteral("%1").arg(val, m_exactNumDigits, 10, QLatin1Char('0'));

  setText(str);
}

int DigitsLineEdit::getValue() const
{
  if (text().isEmpty())
    return 0;
  return text().remove(QLatin1Char(' ')).toInt();
}

void DigitsLineEdit::setCursorPosition(int curPos)
{
  
  curPos = curPos < 0 ? 1 : curPos;
  QLineEdit::setCursorPosition(curPos);
}

void DigitsLineEdit::wheelEvent(QWheelEvent *event)
{
  LineEdit::wheelEvent(event);
  const QString txt = text();
  if (m_exactNumDigits > 0 && txt.length() != m_exactNumDigits)
    return;
  event->accept();
  int cursorPos = cursorPosition();
  emit wheelEventReceived(event->delta() > 0, cursorPos);
}

void DigitsLineEdit::keyPressEvent(QKeyEvent *event)
{
  LineEdit::keyPressEvent(event);
  if (event->key() == Qt::Key_Up || event->key() == Qt::Key_Down)
  {
    const bool bUp = event->key() == Qt::Key_Up;
    const int cursorPos = cursorPosition();
    emit wheelEventReceived(bUp, cursorPos);
  }
}

}