filterwidget.cpp Example File | Qt Widgets 5.12.9

- Qt 5.12
- Qt Widgets
- Custom Sort/Filter Model Example
- filterwidget.cpp Example File
- Qt 5.12.9 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;
             }
         }
     }