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/*
This file is part of the Grantlee template system.
Copyright (c) 2010 Stephen Kelly <steveire@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version
2.1 of the Licence, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "comboboxdelegate.h"
#include "comboboxdelegate_p.h"
#include <QApplication>
#include <QDebug>
ComboBoxEditorCreator::ComboBoxEditorCreator(const QStringList &data,
ComboBoxDelegate::Type type)
: QItemEditorCreatorBase(), m_data(data), m_type(type)
{
}
ComboBoxEditorCreator::~ComboBoxEditorCreator() {}
QWidget *ComboBoxEditorCreator::createWidget(QWidget *parent) const
{
ViewComboBox *vcb = new ViewComboBox(parent);
vcb->addItems(m_data);
if (m_type == ComboBoxDelegate::Editable)
vcb->setEditable(true);
return vcb;
}
QByteArray ComboBoxEditorCreator::valuePropertyName() const
{
return QByteArray("choice");
}
ViewComboBox::ViewComboBox(QWidget *parent) : QComboBox(parent) {}
QString ViewComboBox::choice() const { return currentText(); }
void ViewComboBox::setChoice(const QString &choice)
{
const int index = findData(choice, Qt::DisplayRole, Qt::MatchFixedString);
if (index >= 0)
setCurrentIndex(index);
else
setEditText(choice);
}
ComboBoxDelegate::ComboBoxDelegate(const QStringList &data, Type type,
QObject *parent)
: QItemDelegate(parent)
{
QItemEditorFactory *factory = new QItemEditorFactory;
QItemEditorCreatorBase *creator = new ComboBoxEditorCreator(data, type);
factory->registerEditor(QMetaType::QString, creator);
setItemEditorFactory(factory);
}
QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
QWidget *w = QItemDelegate::createEditor(parent, option, index);
ViewComboBox *viewComboBox = qobject_cast<ViewComboBox *>(w);
Q_ASSERT(viewComboBox);
return viewComboBox;
}
static QSize textSize(const QFont &font, const QString &text)
{
QFontMetrics fm(font);
QSize size = fm.size(Qt::TextSingleLine, text);
const int textMargin
= QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
return QSize(size.width() + 2 * textMargin, size.height());
}
QSize ComboBoxDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (m_sizes.contains(index.row())) {
return m_sizes.value(index.row());
}
QSize sz;
QVariant fontData = index.data(Qt::FontRole);
QFont fnt = qvariant_cast<QFont>(fontData).resolve(option.font);
for (int i = 0; i < sizeof sTypes / sizeof *sTypes; ++i) {
QString text = *(sTypes + i);
QSize s = textSize(fnt, text);
sz = sz.expandedTo(s);
}
QStyleOptionComboBox opt;
opt.editable = true;
opt.frame = true;
opt.currentText = index.data().toString();
sz = qApp->style()->sizeFromContents(QStyle::CT_ComboBox, &opt, sz);
m_sizes.insert(index.row(), sz);
return sz;
}
#include "moc_comboboxdelegate_p.cpp"
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