| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the examples of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #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.userType())) { |
| 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.userType())) |
| return nullptr; |
| |
| QLineEdit *lineEdit = new QLineEdit(parent); |
| lineEdit->setFrame(false); |
| |
| QRegularExpression regExp; |
| |
| switch (originalValue.userType()) { |
| case QMetaType::Bool: |
| regExp = boolExp; |
| break; |
| case QMetaType::QByteArray: |
| regExp = byteArrayExp; |
| break; |
| case QMetaType::QChar: |
| regExp = charExp; |
| break; |
| case QMetaType::QColor: |
| regExp = colorExp; |
| break; |
| case QMetaType::QDate: |
| regExp = dateExp; |
| break; |
| case QMetaType::QDateTime: |
| regExp = dateTimeExp; |
| break; |
| case QMetaType::Double: |
| regExp = doubleExp; |
| break; |
| case QMetaType::Int: |
| case QMetaType::LongLong: |
| regExp = signedIntegerExp; |
| break; |
| case QMetaType::QPoint: |
| regExp = pointExp; |
| break; |
| case QMetaType::QRect: |
| regExp = rectExp; |
| break; |
| case QMetaType::QSize: |
| regExp = sizeExp; |
| break; |
| case QMetaType::QTime: |
| regExp = timeExp; |
| break; |
| case QMetaType::UInt: |
| case QMetaType::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.userType()) { |
| case QMetaType::QChar: |
| value = text.at(0); |
| break; |
| case QMetaType::QColor: |
| 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 QMetaType::QDate: |
| { |
| QDate date = QDate::fromString(text, Qt::ISODate); |
| if (!date.isValid()) |
| return; |
| value = date; |
| } |
| break; |
| case QMetaType::QDateTime: |
| { |
| QDateTime dateTime = QDateTime::fromString(text, Qt::ISODate); |
| if (!dateTime.isValid()) |
| return; |
| value = dateTime; |
| } |
| break; |
| case QMetaType::QPoint: |
| match = pointExp.match(text); |
| value = QPoint(match.captured(1).toInt(), match.captured(2).toInt()); |
| break; |
| case QMetaType::QRect: |
| match = rectExp.match(text); |
| value = QRect(match.captured(1).toInt(), match.captured(2).toInt(), |
| match.captured(3).toInt(), match.captured(4).toInt()); |
| break; |
| case QMetaType::QSize: |
| match = sizeExp.match(text); |
| value = QSize(match.captured(1).toInt(), match.captured(2).toInt()); |
| break; |
| case QMetaType::QStringList: |
| value = text.split(','); |
| break; |
| case QMetaType::QTime: |
| { |
| QTime time = QTime::fromString(text, Qt::ISODate); |
| if (!time.isValid()) |
| return; |
| value = time; |
| } |
| break; |
| default: |
| value = text; |
| value.convert(originalValue.userType()); |
| } |
| |
| model->setData(index, displayText(value), Qt::DisplayRole); |
| model->setData(index, value, Qt::UserRole); |
| } |
| |
| bool VariantDelegate::isSupportedType(int type) |
| { |
| switch (type) { |
| case QMetaType::Bool: |
| case QMetaType::QByteArray: |
| case QMetaType::QChar: |
| case QMetaType::QColor: |
| case QMetaType::QDate: |
| case QMetaType::QDateTime: |
| case QMetaType::Double: |
| case QMetaType::Int: |
| case QMetaType::LongLong: |
| case QMetaType::QPoint: |
| case QMetaType::QRect: |
| case QMetaType::QSize: |
| case QMetaType::QString: |
| case QMetaType::QStringList: |
| case QMetaType::QTime: |
| case QMetaType::UInt: |
| case QMetaType::ULongLong: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| QString VariantDelegate::displayText(const QVariant &value) |
| { |
| switch (value.userType()) { |
| case QMetaType::Bool: |
| case QMetaType::QByteArray: |
| case QMetaType::QChar: |
| case QMetaType::Double: |
| case QMetaType::Int: |
| case QMetaType::LongLong: |
| case QMetaType::QString: |
| case QMetaType::UInt: |
| case QMetaType::ULongLong: |
| return value.toString(); |
| case QMetaType::QColor: |
| { |
| 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 QMetaType::QDate: |
| return value.toDate().toString(Qt::ISODate); |
| case QMetaType::QDateTime: |
| return value.toDateTime().toString(Qt::ISODate); |
| case QMetaType::UnknownType: |
| return "<Invalid>"; |
| case QMetaType::QPoint: |
| { |
| QPoint point = value.toPoint(); |
| return QString("(%1,%2)").arg(point.x()).arg(point.y()); |
| } |
| case QMetaType::QRect: |
| { |
| QRect rect = value.toRect(); |
| return QString("(%1,%2,%3,%4)") |
| .arg(rect.x()).arg(rect.y()) |
| .arg(rect.width()).arg(rect.height()); |
| } |
| case QMetaType::QSize: |
| { |
| QSize size = value.toSize(); |
| return QString("(%1,%2)").arg(size.width()).arg(size.height()); |
| } |
| case QMetaType::QStringList: |
| return value.toStringList().join(','); |
| case QMetaType::QTime: |
| return value.toTime().toString(Qt::ISODate); |
| default: |
| break; |
| } |
| return QString("<%1>").arg(value.typeName()); |
| } |