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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "variantdelegate.h" |
| |
| #include <QDateTime> |
| #include <QLineEdit> |
| #include <QRegularExpressionValidator> |
| |
| VariantDelegate::VariantDelegate(QObject *parent) |
| : QStyledItemDelegate(parent) |
| { |
| boolExp.setPattern("true|false"); |
| boolExp.setPatternOptions(QRegularExpression::CaseInsensitiveOption); |
| |
| byteArrayExp.setPattern("[\\x00-\\xff]*"); |
| charExp.setPattern("."); |
| colorExp.setPattern("^\\(([0-9]*),([0-9]*),([0-9]*),([0-9]*)\\)$"); |
| doubleExp.setPattern(""); |
| pointExp.setPattern("^\\((-?[0-9]*),(-?[0-9]*)\\)$"); |
| rectExp.setPattern("^\\((-?[0-9]*),(-?[0-9]*),(-?[0-9]*),(-?[0-9]*)\\)$"); |
| signedIntegerExp.setPattern("-?[0-9]*"); |
| sizeExp = pointExp; |
| unsignedIntegerExp.setPattern("[0-9]*"); |
| |
| dateExp.setPattern("([0-9]{,4})-([0-9]{,2})-([0-9]{,2})"); |
| timeExp.setPattern("([0-9]{,2}):([0-9]{,2}):([0-9]{,2})"); |
| dateTimeExp.setPattern(dateExp.pattern() + 'T' + timeExp.pattern()); |
| } |
| |
| void VariantDelegate::paint(QPainter *painter, |
| const QStyleOptionViewItem &option, |
| const QModelIndex &index) const |
| { |
| if (index.column() == 2) { |
| QVariant value = index.model()->data(index, Qt::UserRole); |
| if (!isSupportedType(value.type())) { |
| QStyleOptionViewItem myOption = option; |
| myOption.state &= ~QStyle::State_Enabled; |
| QStyledItemDelegate::paint(painter, myOption, index); |
| return; |
| } |
| } |
| |
| QStyledItemDelegate::paint(painter, option, index); |
| } |
| |
| QWidget *VariantDelegate::createEditor(QWidget *parent, |
| const QStyleOptionViewItem & /* option */, |
| const QModelIndex &index) const |
| { |
| if (index.column() != 2) |
| return nullptr; |
| |
| QVariant originalValue = index.model()->data(index, Qt::UserRole); |
| if (!isSupportedType(originalValue.type())) |
| return nullptr; |
| |
| QLineEdit *lineEdit = new QLineEdit(parent); |
| lineEdit->setFrame(false); |
| |
| QRegularExpression regExp; |
| |
| switch (originalValue.type()) { |
| case QVariant::Bool: |
| regExp = boolExp; |
| break; |
| case QVariant::ByteArray: |
| regExp = byteArrayExp; |
| break; |
| case QVariant::Char: |
| regExp = charExp; |
| break; |
| case QVariant::Color: |
| regExp = colorExp; |
| break; |
| case QVariant::Date: |
| regExp = dateExp; |
| break; |
| case QVariant::DateTime: |
| regExp = dateTimeExp; |
| break; |
| case QVariant::Double: |
| regExp = doubleExp; |
| break; |
| case QVariant::Int: |
| case QVariant::LongLong: |
| regExp = signedIntegerExp; |
| break; |
| case QVariant::Point: |
| regExp = pointExp; |
| break; |
| case QVariant::Rect: |
| regExp = rectExp; |
| break; |
| case QVariant::Size: |
| regExp = sizeExp; |
| break; |
| case QVariant::Time: |
| regExp = timeExp; |
| break; |
| case QVariant::UInt: |
| case QVariant::ULongLong: |
| regExp = unsignedIntegerExp; |
| break; |
| default: |
| break; |
| } |
| |
| if (regExp.isValid()) { |
| QValidator *validator = new QRegularExpressionValidator(regExp, lineEdit); |
| lineEdit->setValidator(validator); |
| } |
| |
| return lineEdit; |
| } |
| |
| void VariantDelegate::setEditorData(QWidget *editor, |
| const QModelIndex &index) const |
| { |
| QVariant value = index.model()->data(index, Qt::UserRole); |
| if (QLineEdit *lineEdit = qobject_cast<QLineEdit *>(editor)) |
| lineEdit->setText(displayText(value)); |
| } |
| |
| void VariantDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, |
| const QModelIndex &index) const |
| { |
| QLineEdit *lineEdit = qobject_cast<QLineEdit *>(editor); |
| if (!lineEdit->isModified()) |
| return; |
| |
| QString text = lineEdit->text(); |
| const QValidator *validator = lineEdit->validator(); |
| if (validator) { |
| int pos; |
| if (validator->validate(text, pos) != QValidator::Acceptable) |
| return; |
| } |
| |
| QVariant originalValue = index.model()->data(index, Qt::UserRole); |
| QVariant value; |
| QRegularExpressionMatch match; |
| |
| switch (originalValue.type()) { |
| case QVariant::Char: |
| value = text.at(0); |
| break; |
| case QVariant::Color: |
| match = colorExp.match(text); |
| value = QColor(qMin(match.captured(1).toInt(), 255), |
| qMin(match.captured(2).toInt(), 255), |
| qMin(match.captured(3).toInt(), 255), |
| qMin(match.captured(4).toInt(), 255)); |
| break; |
| case QVariant::Date: |
| { |
| QDate date = QDate::fromString(text, Qt::ISODate); |
| if (!date.isValid()) |
| return; |
| value = date; |
| } |
| break; |
| case QVariant::DateTime: |
| { |
| QDateTime dateTime = QDateTime::fromString(text, Qt::ISODate); |
| if (!dateTime.isValid()) |
| return; |
| value = dateTime; |
| } |
| break; |
| case QVariant::Point: |
| match = pointExp.match(text); |
| value = QPoint(match.captured(1).toInt(), match.captured(2).toInt()); |
| break; |
| case QVariant::Rect: |
| match = rectExp.match(text); |
| value = QRect(match.captured(1).toInt(), match.captured(2).toInt(), |
| match.captured(3).toInt(), match.captured(4).toInt()); |
| break; |
| case QVariant::Size: |
| match = sizeExp.match(text); |
| value = QSize(match.captured(1).toInt(), match.captured(2).toInt()); |
| break; |
| case QVariant::StringList: |
| value = text.split(','); |
| break; |
| case QVariant::Time: |
| { |
| QTime time = QTime::fromString(text, Qt::ISODate); |
| if (!time.isValid()) |
| return; |
| value = time; |
| } |
| break; |
| default: |
| value = text; |
| value.convert(originalValue.type()); |
| } |
| |
| model->setData(index, displayText(value), Qt::DisplayRole); |
| model->setData(index, value, Qt::UserRole); |
| } |
| |
| bool VariantDelegate::isSupportedType(QVariant::Type type) |
| { |
| switch (type) { |
| case QVariant::Bool: |
| case QVariant::ByteArray: |
| case QVariant::Char: |
| case QVariant::Color: |
| case QVariant::Date: |
| case QVariant::DateTime: |
| case QVariant::Double: |
| case QVariant::Int: |
| case QVariant::LongLong: |
| case QVariant::Point: |
| case QVariant::Rect: |
| case QVariant::Size: |
| case QVariant::String: |
| case QVariant::StringList: |
| case QVariant::Time: |
| case QVariant::UInt: |
| case QVariant::ULongLong: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| QString VariantDelegate::displayText(const QVariant &value) |
| { |
| switch (value.type()) { |
| case QVariant::Bool: |
| case QVariant::ByteArray: |
| case QVariant::Char: |
| case QVariant::Double: |
| case QVariant::Int: |
| case QVariant::LongLong: |
| case QVariant::String: |
| case QVariant::UInt: |
| case QVariant::ULongLong: |
| return value.toString(); |
| case QVariant::Color: |
| { |
| QColor color = qvariant_cast<QColor>(value); |
| return QString("(%1,%2,%3,%4)") |
| .arg(color.red()).arg(color.green()) |
| .arg(color.blue()).arg(color.alpha()); |
| } |
| case QVariant::Date: |
| return value.toDate().toString(Qt::ISODate); |
| case QVariant::DateTime: |
| return value.toDateTime().toString(Qt::ISODate); |
| case QVariant::Invalid: |
| return "<Invalid>"; |
| case QVariant::Point: |
| { |
| QPoint point = value.toPoint(); |
| return QString("(%1,%2)").arg(point.x()).arg(point.y()); |
| } |
| case QVariant::Rect: |
| { |
| QRect rect = value.toRect(); |
| return QString("(%1,%2,%3,%4)") |
| .arg(rect.x()).arg(rect.y()) |
| .arg(rect.width()).arg(rect.height()); |
| } |
| case QVariant::Size: |
| { |
| QSize size = value.toSize(); |
| return QString("(%1,%2)").arg(size.width()).arg(size.height()); |
| } |
| case QVariant::StringList: |
| return value.toStringList().join(','); |
| case QVariant::Time: |
| return value.toTime().toString(Qt::ISODate); |
| default: |
| break; |
| } |
| return QString("<%1>").arg(value.typeName()); |
| } |