PrismLauncher/launcher/ui/widgets/ModListView.cpp

/* Copyright 2013-2021 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "ModListView.h"

#include "minecraft/mod/ModFolderModel.h"

#include <QHeaderView>
#include <QMouseEvent>
#include <QPainter>
#include <QDrag>
#include <QRect>

ModListView::ModListView ( QWidget* parent )
    :QTreeView ( parent )
{
    setAllColumnsShowFocus ( true );
    setExpandsOnDoubleClick ( false );
    setRootIsDecorated ( false );
    setSortingEnabled ( true );
    setAlternatingRowColors ( true );
    setSelectionMode ( QAbstractItemView::ExtendedSelection );
    setHeaderHidden ( false );
    setSelectionBehavior(QAbstractItemView::SelectRows);
    setHorizontalScrollBarPolicy ( Qt::ScrollBarAsNeeded );
    setDropIndicatorShown(true);
    setDragEnabled(true);
    setDragDropMode(QAbstractItemView::DropOnly);
    viewport()->setAcceptDrops(true);
}

void ModListView::setModel ( QAbstractItemModel* model )
{
    QTreeView::setModel ( model );
    auto head = header();
    head->setStretchLastSection(false);
    // HACK: this is true for the checkbox column of mod lists
    auto string = model->headerData(0,head->orientation()).toString();
    if(head->count() < 1)
    {
        return;
    }
    if(!string.size())
    {
        head->setSectionResizeMode(0, QHeaderView::ResizeToContents);
        head->setSectionResizeMode(1, QHeaderView::Stretch);
        for(int i = 2; i < head->count(); i++)
            head->setSectionResizeMode(i, QHeaderView::ResizeToContents);
    }
    else
    {
        head->setSectionResizeMode(0, QHeaderView::Stretch);
        for(int i = 1; i < head->count(); i++)
            head->setSectionResizeMode(i, QHeaderView::ResizeToContents);
    }

    auto real_model = model;
    if (auto proxy_model = dynamic_cast<QSortFilterProxyModel*>(model); proxy_model)
        real_model = proxy_model->sourceModel();

    if (auto mod_model = dynamic_cast<ModFolderModel*>(real_model); mod_model) {
        connect(mod_model, &ModFolderModel::updateFinished, this, [this, mod_model]{
            auto mods = mod_model->allMods();
            // Hide the 'Provider' column if no mod has a defined provider!
            setColumnHidden(ModFolderModel::Columns::ProviderColumn,
                    std::none_of(mods.constBegin(), mods.constEnd(), [](auto const mod){ return mod->provider().has_value(); }));
        });
    }
}