variantdelegate.cpp Example File
tools/settingseditor/variantdelegate.cpp
/****************************************************************************
**
** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
**
** This file is part of the documentation of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QtGui>
#include "variantdelegate.h"
VariantDelegate::VariantDelegate(QObject *parent)
: QItemDelegate(parent)
{
boolExp.setPattern("true|false");
boolExp.setCaseSensitivity(Qt::CaseInsensitive);
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;
QItemDelegate::paint(painter, myOption, index);
return;
}
}
QItemDelegate::paint(painter, option, index);
}
QWidget *VariantDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem & /* option */,
const QModelIndex &index) const
{
if (index.column() != 2)
return 0;
QVariant originalValue = index.model()->data(index, Qt::UserRole);
if (!isSupportedType(originalValue.type()))
return 0;
QLineEdit *lineEdit = new QLineEdit(parent);
lineEdit->setFrame(false);
QRegExp 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:
;
}
if (!regExp.isEmpty()) {
QValidator *validator = new QRegExpValidator(regExp, lineEdit);
lineEdit->setValidator(validator);
}
connect(lineEdit, SIGNAL(returnPressed()),
this, SLOT(commitAndCloseEditor()));
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;
switch (originalValue.type()) {
case QVariant::Char:
value = text.at(0);
break;
case QVariant::Color:
colorExp.exactMatch(text);
value = QColor(qMin(colorExp.cap(1).toInt(), 255),
qMin(colorExp.cap(2).toInt(), 255),
qMin(colorExp.cap(3).toInt(), 255),
qMin(colorExp.cap(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:
pointExp.exactMatch(text);
value = QPoint(pointExp.cap(1).toInt(), pointExp.cap(2).toInt());
break;
case QVariant::Rect:
rectExp.exactMatch(text);
value = QRect(rectExp.cap(1).toInt(), rectExp.cap(2).toInt(),
rectExp.cap(3).toInt(), rectExp.cap(4).toInt());
break;
case QVariant::Size:
sizeExp.exactMatch(text);
value = QSize(sizeExp.cap(1).toInt(), sizeExp.cap(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);
}
return QString("<%1>").arg(value.typeName());
}
void VariantDelegate::commitAndCloseEditor()
{
QWidget *editor = qobject_cast<QWidget *>(sender());
emit commitData(editor);
emit closeEditor(editor);
}
