squawk/ui/utils/comboboxdelegate.cpp

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "QTimer"
#include "comboboxdelegate.h"
ComboboxDelegate::ComboboxDelegate(QObject *parent):
QStyledItemDelegate(parent),
entries(),
ff(new FocusFilter())
{
}
ComboboxDelegate::~ComboboxDelegate()
{
delete ff;
}
QWidget* ComboboxDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
QComboBox *cb = new QComboBox(parent);
for (const std::pair<QString, QIcon>& pair : entries) {
cb->addItem(pair.second, pair.first);
}
return cb;
}
void ComboboxDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{
QComboBox *cb = static_cast<QComboBox*>(editor);
int currentIndex = index.data(Qt::EditRole).toInt();
if (currentIndex >= 0) {
cb->setCurrentIndex(currentIndex);
cb->installEventFilter(ff);
}
}
void ComboboxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
QComboBox *cb = static_cast<QComboBox *>(editor);
model->setData(index, cb->currentIndex(), Qt::EditRole);
}
void ComboboxDelegate::addEntry(const QString& title, const QIcon& icon)
{
entries.emplace_back(title, icon);
}
bool ComboboxDelegate::FocusFilter::eventFilter(QObject* src, QEvent* evt)
{
if (evt->type() == QEvent::FocusIn) {
QComboBox* cb = static_cast<QComboBox*>(src);
cb->removeEventFilter(this);
QTimer* timer = new QTimer; //TODO that is ridiculous! I refuse to believe there is no better way than that one!
QObject::connect(timer, &QTimer::timeout, [timer, cb]() {
cb->showPopup();
timer->deleteLater();
});
timer->setSingleShot(true);
timer->start(100);
}
return QObject::eventFilter(src, evt);
}