Qt 5.11 | Qt Widgets | Custom Sort/Filter Model Example | filterwidget.cpp Example File

Qt 5.11.3 Reference Documentation

# filterwidget.cpp Example File

itemviews/customsortfiltermodel/filterwidget.cpp

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      #include "filterwidget.h"

      #include <QIcon>
      #include <QPixmap>
      #include <QImage>
      #include <QMenu>
      #include <QAction>
      #include <QActionGroup>
      #include <QToolButton>
      #include <QWidgetAction>
      #include <QDebug>

      FilterWidget::FilterWidget(QWidget *parent)
          : QLineEdit(parent)
          , m_patternGroup(new QActionGroup(this))
      {
          setClearButtonEnabled(true);
          connect(this, &QLineEdit::textChanged, this, &FilterWidget::filterChanged);

          QMenu *menu = new QMenu(this);
          m_caseSensitivityAction = menu->addAction(tr("Case Sensitive"));
          m_caseSensitivityAction->setCheckable(true);
          connect(m_caseSensitivityAction, &QAction::toggled, this, &FilterWidget::filterChanged);

          menu->addSeparator();
          m_patternGroup->setExclusive(true);
          QAction *patternAction = menu->addAction("Fixed String");
          patternAction->setData(QVariant(int(QRegExp::FixedString)));
          patternAction->setCheckable(true);
          patternAction->setChecked(true);
          m_patternGroup->addAction(patternAction);
          patternAction = menu->addAction("Regular Expression");
          patternAction->setCheckable(true);
          patternAction->setData(QVariant(int(QRegExp::RegExp2)));
          m_patternGroup->addAction(patternAction);
          patternAction = menu->addAction("Wildcard");
          patternAction->setCheckable(true);
          patternAction->setData(QVariant(int(QRegExp::Wildcard)));
          m_patternGroup->addAction(patternAction);
          connect(m_patternGroup, &QActionGroup::triggered, this, &FilterWidget::filterChanged);

          const QIcon icon = QIcon(QPixmap(":/images/find.png"));
          QToolButton *optionsButton = new QToolButton;
      #ifndef QT_NO_CURSOR
          optionsButton->setCursor(Qt::ArrowCursor);
      #endif
          optionsButton->setFocusPolicy(Qt::NoFocus);
          optionsButton->setStyleSheet("* { border: none; }");
          optionsButton->setIcon(icon);
          optionsButton->setMenu(menu);
          optionsButton->setPopupMode(QToolButton::InstantPopup);

          QWidgetAction *optionsAction = new QWidgetAction(this);
          optionsAction->setDefaultWidget(optionsButton);
          addAction(optionsAction, QLineEdit::LeadingPosition);
      }

      Qt::CaseSensitivity FilterWidget::caseSensitivity() const
      {
          return m_caseSensitivityAction->isChecked() ? Qt::CaseSensitive : Qt::CaseInsensitive;
      }

      void FilterWidget::setCaseSensitivity(Qt::CaseSensitivity cs)
      {
          m_caseSensitivityAction->setChecked(cs == Qt::CaseSensitive);
      }

      static inline QRegExp::PatternSyntax patternSyntaxFromAction(const QAction *a)
      {
          return static_cast<QRegExp::PatternSyntax>(a->data().toInt());
      }

      QRegExp::PatternSyntax FilterWidget::patternSyntax() const
      {
          return patternSyntaxFromAction(m_patternGroup->checkedAction());
      }

      void FilterWidget::setPatternSyntax(QRegExp::PatternSyntax s)
      {
          foreach (QAction *a, m_patternGroup->actions()) {
              if (patternSyntaxFromAction(a) == s) {
                  a->setChecked(true);
                  break;
              }
          }
      }