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/*
SPDX-FileCopyrightText: 2013 Kevin Funk <kfunk@kde.org>
SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
*/
#include "placeholderitemproxymodel.h"
#include <KColorScheme>
using namespace KDevelop;
class KDevelop::PlaceholderItemProxyModelPrivate
{
public:
explicit PlaceholderItemProxyModelPrivate(PlaceholderItemProxyModel* qq)
: q(qq)
{}
inline int sourceRowCount()
{
return q->sourceModel() ? q->sourceModel()->rowCount() : 0;
}
inline bool isPlaceholderRow(const QModelIndex& index) const
{
if (!q->sourceModel()) {
return false;
}
return index.row() == q->sourceModel()->rowCount();
}
PlaceholderItemProxyModel* const q;
/// column -> hint mapping
QMap<int, QVariant> m_columnHints;
};
PlaceholderItemProxyModel::PlaceholderItemProxyModel(QObject* parent)
: QIdentityProxyModel(parent)
, d_ptr(new PlaceholderItemProxyModelPrivate(this))
{}
PlaceholderItemProxyModel::~PlaceholderItemProxyModel()
{
}
QVariant PlaceholderItemProxyModel::columnHint(int column) const
{
Q_D(const PlaceholderItemProxyModel);
return d->m_columnHints.value(column);
}
void PlaceholderItemProxyModel::setColumnHint(int column, const QVariant& hint)
{
Q_D(PlaceholderItemProxyModel);
if (column < 0) {
return;
}
d->m_columnHints[column] = hint;
const int row = d->sourceRowCount();
emit dataChanged(index(row, 0), index(row, columnCount()));
}
Qt::ItemFlags PlaceholderItemProxyModel::flags(const QModelIndex& index) const
{
Q_D(const PlaceholderItemProxyModel);
if (d->isPlaceholderRow(index)) {
Qt::ItemFlags flags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
const int column = index.column();
// if the column doesn't provide a hint we assume that we can't edit this field
if (d->m_columnHints.contains(column)) {
flags |= Qt::ItemIsEditable;
}
return flags;
}
return QIdentityProxyModel::flags(index);
}
void PlaceholderItemProxyModel::setSourceModel(QAbstractItemModel* sourceModel)
{
QIdentityProxyModel::setSourceModel(sourceModel);
// TODO: Listen to layoutDataChanged signals?
}
int PlaceholderItemProxyModel::rowCount(const QModelIndex& parent) const
{
if (!sourceModel())
return 0;
// only flat models supported for now, assert early in case that's not true
Q_ASSERT(!parent.isValid());
Q_UNUSED(parent);
return sourceModel()->rowCount() + 1;
}
bool KDevelop::PlaceholderItemProxyModel::hasChildren(const QModelIndex& parent) const
{
if (!parent.isValid()) {
return true;
}
return QIdentityProxyModel::hasChildren(parent);
}
QVariant PlaceholderItemProxyModel::data(const QModelIndex& proxyIndex, int role) const
{
Q_D(const PlaceholderItemProxyModel);
const int column = proxyIndex.column();
if (d->isPlaceholderRow(proxyIndex)) {
switch (role) {
case Qt::DisplayRole:
return columnHint(column);
case Qt::ForegroundRole: {
const KColorScheme scheme(QPalette::Normal);
return scheme.foreground(KColorScheme::InactiveText);
}
default:
return QVariant();
}
}
return QIdentityProxyModel::data(proxyIndex, role);
}
QModelIndex PlaceholderItemProxyModel::parent(const QModelIndex& child) const
{
Q_D(const PlaceholderItemProxyModel);
if (d->isPlaceholderRow(child)) {
return QModelIndex();
}
return QIdentityProxyModel::parent(child);
}
QModelIndex PlaceholderItemProxyModel::buddy(const QModelIndex& index) const
{
Q_D(const PlaceholderItemProxyModel);
if (d->isPlaceholderRow(index)) {
return index;
}
return QIdentityProxyModel::buddy(index);
}
QModelIndex PlaceholderItemProxyModel::sibling(int row, int column, const QModelIndex& idx) const
{
const bool isPlaceHolderRow = (sourceModel() ? row == sourceModel()->rowCount() : false);
if (isPlaceHolderRow) {
return index(row, column, QModelIndex());
}
return QIdentityProxyModel::sibling(row, column, idx);
}
QModelIndex PlaceholderItemProxyModel::mapToSource(const QModelIndex& proxyIndex) const
{
Q_D(const PlaceholderItemProxyModel);
if (d->isPlaceholderRow(proxyIndex)) {
return QModelIndex();
}
return QIdentityProxyModel::mapToSource(proxyIndex);
}
bool PlaceholderItemProxyModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
Q_D(PlaceholderItemProxyModel);
const int column = index.column();
if (d->isPlaceholderRow(index) && role == Qt::EditRole && d->m_columnHints.contains(column)) {
const bool accept = validateRow(index, value);
// if validation fails, clear the complete line
if (!accept) {
emit dataChanged(index, index);
return false;
}
// update view
emit dataChanged(index, index);
// notify observers
emit dataInserted(column, value);
return true;
}
return QIdentityProxyModel::setData(index, value, role);
}
QModelIndex PlaceholderItemProxyModel::index(int row, int column, const QModelIndex& parent) const
{
Q_ASSERT(!parent.isValid());
Q_UNUSED(parent);
const bool isPlaceHolderRow = (sourceModel() ? row == sourceModel()->rowCount() : false);
if (isPlaceHolderRow) {
return createIndex(row, column);
}
return QIdentityProxyModel::index(row, column, parent);
}
bool PlaceholderItemProxyModel::validateRow(const QModelIndex& index, const QVariant& value) const
{
Q_UNUSED(index);
return !value.toString().isEmpty();
}
#include "moc_placeholderitemproxymodel.cpp"
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