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// SPDX-License-Identifier: GPL-3.0-only
// SPDX-FileCopyrightText: 2026 Project Tick
// SPDX-FileContributor: Project Tick Team
/*
* ProjT Launcher - Minecraft Launcher
* Copyright (C) 2026 Project Tick
*
* 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, version 3.
*
* 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, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* === Upstream License Block (Do Not Modify) ==============================
*
*
*
* Prism Launcher - Minecraft Launcher
* Copyright (c) 2023 Trial97 <alexandru.tripon97@gmail.com>
*
* 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, version 3.
*
* 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, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* ======================================================================== */
#include "CheckComboBox.h"
#include <QAbstractItemView>
#include <QBoxLayout>
#include <QEvent>
#include <QIdentityProxyModel>
#include <QKeyEvent>
#include <QLineEdit>
#include <QListView>
#include <QMouseEvent>
#include <QStringList>
#include <QStylePainter>
class CheckComboModel : public QIdentityProxyModel
{
Q_OBJECT
public:
explicit CheckComboModel(QObject* parent = nullptr) : QIdentityProxyModel(parent)
{}
virtual Qt::ItemFlags flags(const QModelIndex& index) const
{
return QIdentityProxyModel::flags(index) | Qt::ItemIsUserCheckable;
}
virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const
{
if (role == Qt::CheckStateRole)
{
auto txt = QIdentityProxyModel::data(index, Qt::DisplayRole).toString();
return m_checked.contains(txt) ? Qt::Checked : Qt::Unchecked;
}
if (role == Qt::DisplayRole)
return QIdentityProxyModel::data(index, Qt::DisplayRole);
return {};
}
virtual bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole)
{
if (role == Qt::CheckStateRole)
{
auto txt = QIdentityProxyModel::data(index, Qt::DisplayRole).toString();
if (m_checked.contains(txt))
{
m_checked.removeOne(txt);
}
else
{
m_checked.push_back(txt);
}
emit dataChanged(index, index);
emit checkStateChanged();
return true;
}
return QIdentityProxyModel::setData(index, value, role);
}
QStringList getChecked()
{
return m_checked;
}
signals:
void checkStateChanged();
private:
QStringList m_checked;
};
CheckComboBox::CheckComboBox(QWidget* parent) : QComboBox(parent), m_separator(", ")
{
view()->installEventFilter(this);
view()->window()->installEventFilter(this);
view()->viewport()->installEventFilter(this);
this->installEventFilter(this);
}
void CheckComboBox::setSourceModel(QAbstractItemModel* new_model)
{
auto proxy = new CheckComboModel(this);
proxy->setSourceModel(new_model);
model()->disconnect(this);
QComboBox::setModel(proxy);
connect(this, &QComboBox::activated, this, &CheckComboBox::toggleCheckState);
connect(proxy, &CheckComboModel::checkStateChanged, this, &CheckComboBox::emitCheckedItemsChanged);
connect(model(), &CheckComboModel::rowsInserted, this, &CheckComboBox::emitCheckedItemsChanged);
connect(model(), &CheckComboModel::rowsRemoved, this, &CheckComboBox::emitCheckedItemsChanged);
}
void CheckComboBox::hidePopup()
{
if (!m_containerMousePress)
QComboBox::hidePopup();
}
void CheckComboBox::emitCheckedItemsChanged()
{
emit checkedItemsChanged(checkedItems());
}
QString CheckComboBox::defaultText() const
{
return m_default_text;
}
void CheckComboBox::setDefaultText(const QString& text)
{
m_default_text = text;
}
QString CheckComboBox::separator() const
{
return m_separator;
}
void CheckComboBox::setSeparator(const QString& separator)
{
m_separator = separator;
}
bool CheckComboBox::eventFilter(QObject* receiver, QEvent* event)
{
switch (event->type())
{
case QEvent::KeyPress:
case QEvent::KeyRelease:
{
QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
if (receiver == this && (keyEvent->key() == Qt::Key_Up || keyEvent->key() == Qt::Key_Down))
{
showPopup();
return true;
}
else if (keyEvent->key() == Qt::Key_Enter || keyEvent->key() == Qt::Key_Return
|| keyEvent->key() == Qt::Key_Escape)
{
QComboBox::hidePopup();
return (keyEvent->key() != Qt::Key_Escape);
}
break;
}
case QEvent::MouseButtonPress:
{
auto ev = static_cast<QMouseEvent*>(event);
m_containerMousePress = ev && view()->indexAt(ev->pos()).isValid();
break;
}
case QEvent::Wheel: return receiver == this;
default: break;
}
return false;
}
void CheckComboBox::toggleCheckState(int index)
{
QVariant value = itemData(index, Qt::CheckStateRole);
if (value.isValid())
{
Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
setItemData(index, (state == Qt::Unchecked ? Qt::Checked : Qt::Unchecked), Qt::CheckStateRole);
}
emitCheckedItemsChanged();
}
Qt::CheckState CheckComboBox::itemCheckState(int index) const
{
return static_cast<Qt::CheckState>(itemData(index, Qt::CheckStateRole).toInt());
}
void CheckComboBox::setItemCheckState(int index, Qt::CheckState state)
{
setItemData(index, state, Qt::CheckStateRole);
}
QStringList CheckComboBox::checkedItems() const
{
if (auto* checkModel = dynamic_cast<CheckComboModel*>(model()))
return checkModel->getChecked();
return {};
}
void CheckComboBox::setCheckedItems(const QStringList& items)
{
for (auto text : items)
{
auto index = findText(text);
setItemCheckState(index, index != -1 ? Qt::Checked : Qt::Unchecked);
}
}
void CheckComboBox::paintEvent(QPaintEvent*)
{
QStylePainter painter(this);
painter.setPen(palette().color(QPalette::Text));
// draw the combobox frame, focusrect and selected etc.
QStyleOptionComboBox opt;
initStyleOption(&opt);
QStringList items = checkedItems();
if (items.isEmpty())
opt.currentText = defaultText();
else
opt.currentText = items.join(separator());
painter.drawComplexControl(QStyle::CC_ComboBox, opt);
// draw the icon and text
painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
}
#include "CheckComboBox.moc"
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