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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.
*/
#include "ProjectItem.h"
#include <QApplication>
#include <QDebug>
#include <QIcon>
#include <QPainter>
#include "Common.h"
ProjectItemDelegate::ProjectItemDelegate(QWidget* parent) : QStyledItemDelegate(parent)
{}
void ProjectItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
painter->save();
QStyleOptionViewItem opt(option);
initStyleOption(&opt, index);
auto isInstalled = index.data(UserDataTypes::INSTALLED).toBool();
auto isChecked = opt.checkState == Qt::Checked;
auto isSelected = option.state & QStyle::State_Selected;
const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
auto rect = opt.rect;
style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, opt.widget);
if (isSelected && style->objectName() != "windowsvista")
painter->setPen(opt.palette.highlightedText().color());
if (opt.features & QStyleOptionViewItem::HasCheckIndicator)
{
QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
style->drawPrimitive(QStyle::PE_IndicatorItemViewItemCheck, &checkboxOpt, painter, opt.widget);
rect.setX(checkboxOpt.rect.right());
}
if (!isSelected && !isChecked && isInstalled)
{
painter->setOpacity(0.4); // Fade out the entire item
}
// The default icon size will be a square (and height is usually the lower value).
auto icon_width = rect.height(), icon_height = rect.height();
int icon_x_margin = (rect.height() - icon_width) / 2;
int icon_y_margin = (rect.height() - icon_height) / 2;
if (!opt.icon.isNull())
{ // Icon painting
{
auto icon_size = opt.decorationSize;
icon_width = icon_size.width();
icon_height = icon_size.height();
icon_y_margin = (rect.height() - icon_height) / 2;
icon_x_margin = icon_y_margin; // use same margins for consistency
}
// Centralize icon with a margin to separate from the other elements
int x = rect.x() + icon_x_margin;
int y = rect.y() + icon_y_margin;
if (opt.features & QStyleOptionViewItem::HasCheckIndicator)
rect.translate(icon_x_margin / 2, 0);
// Prevent 'scaling null pixmap' warnings
if (icon_width > 0 && icon_height > 0)
opt.icon.paint(painter, x, y, icon_width, icon_height);
}
// Change the rect so that funther painting is easier
auto remaining_width = rect.width() - icon_width - 2 * icon_x_margin;
rect.setRect(rect.x() + icon_width + 2 * icon_x_margin, rect.y(), remaining_width, rect.height());
int title_height = 0;
{ // Title painting
auto title = index.data(UserDataTypes::TITLE).toString();
painter->save();
auto font = opt.font;
if (isChecked)
{
font.setBold(true);
}
if (isInstalled)
{
title = tr("%1 [installed]").arg(title);
}
font.setPointSize(font.pointSize() + 2);
painter->setFont(font);
title_height = QFontMetrics(font).height();
// On the top, aligned to the left after the icon
painter->drawText(rect.x(), rect.y() + title_height, title);
painter->restore();
}
{ // Description painting
auto description = index.data(UserDataTypes::DESCRIPTION).toString().simplified();
QTextLayout text_layout(description, opt.font);
qreal height = 0;
auto cut_text = viewItemTextLayout(text_layout, remaining_width, height);
// Get first line unconditionally
description = cut_text.first().second;
auto num_lines = 1;
// Get second line, elided if needed
if (cut_text.size() > 1)
{
// 2.5x so because there should be some margin left from the 2x so things don't get too squishy.
if (rect.height() - title_height <= 2.5 * opt.fontMetrics.height())
{
// If there's not enough space, show only a single line, elided.
description = opt.fontMetrics.elidedText(description, opt.textElideMode, cut_text.at(0).first);
}
else
{
if (cut_text.size() > 2)
{
description +=
opt.fontMetrics.elidedText(cut_text.at(1).second, opt.textElideMode, cut_text.at(1).first);
}
else
{
description += cut_text.at(1).second;
}
num_lines += 1;
}
}
int description_x = rect.x();
// Have the y-value be set based on the number of lines in the description, to centralize the
// description text with the space between the base and the title.
int description_y = rect.y() + title_height + (rect.height() - title_height) / 2;
if (num_lines == 1)
description_y -= opt.fontMetrics.height() / 2;
else
description_y -= opt.fontMetrics.height();
// On the bottom, aligned to the left after the icon, and featuring at most two lines of text (with some margin
// space to spare)
painter->drawText(description_x,
description_y,
remaining_width,
cut_text.size() * opt.fontMetrics.height(),
Qt::TextWordWrap,
description);
}
painter->restore();
}
bool ProjectItemDelegate::editorEvent(QEvent* event,
QAbstractItemModel* model,
const QStyleOptionViewItem& option,
const QModelIndex& index)
{
if (!(event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::MouseButtonPress
|| event->type() == QEvent::MouseButtonDblClick))
return false;
auto mouseEvent = (QMouseEvent*)event;
if (mouseEvent->button() != Qt::LeftButton)
return false;
QStyleOptionViewItem opt(option);
initStyleOption(&opt, index);
const QStyle* style = opt.widget == nullptr ? QApplication::style() : opt.widget->style();
const QStyleOptionViewItem checkboxOpt = makeCheckboxStyleOption(opt, style);
if (!checkboxOpt.rect.contains(mouseEvent->pos().x(), mouseEvent->pos().y()))
return false;
// swallow other events
// (prevents item being selected or double click action triggering)
if (event->type() != QEvent::MouseButtonRelease)
return true;
emit checkboxClicked(index);
return true;
}
QStyleOptionViewItem ProjectItemDelegate::makeCheckboxStyleOption(const QStyleOptionViewItem& opt,
const QStyle* style) const
{
QStyleOptionViewItem checkboxOpt = opt;
checkboxOpt.state &= ~QStyle::State_HasFocus;
if (checkboxOpt.checkState == Qt::Checked)
checkboxOpt.state |= QStyle::State_On;
else
checkboxOpt.state |= QStyle::State_Off;
QRect checkboxRect = style->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &checkboxOpt, opt.widget);
// 5px is the typical top margin for image
// we don't want the checkboxes to be all over the place :)
checkboxOpt.rect = QRect(opt.rect.x() + 5,
opt.rect.y() + (opt.rect.height() / 2 - checkboxRect.height() / 2),
checkboxRect.width(),
checkboxRect.height());
return checkboxOpt;
}
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