140 lines
4.1 KiB
C++
140 lines
4.1 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Clementine is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "searchpreview.h"
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#include "ui_searchpreview.h"
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#include <memory>
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#include <QFutureWatcher>
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#include <QtConcurrentRun>
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#include "querygenerator.h"
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#include "playlist/playlist.h"
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namespace smart_playlists {
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typedef QFuture<PlaylistItemList> Future;
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typedef QFutureWatcher<PlaylistItemList> FutureWatcher;
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SearchPreview::SearchPreview(QWidget* parent)
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: QWidget(parent), ui_(new Ui_SmartPlaylistSearchPreview), model_(nullptr) {
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ui_->setupUi(this);
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// Prevent editing songs and saving settings (like header columns and
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// geometry)
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ui_->tree->setEditTriggers(QAbstractItemView::NoEditTriggers);
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ui_->tree->SetReadOnlySettings(true);
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QFont bold_font;
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bold_font.setBold(true);
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ui_->preview_label->setFont(bold_font);
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ui_->busy_container->hide();
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}
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SearchPreview::~SearchPreview() { delete ui_; }
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void SearchPreview::set_application(Application* app) {
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ui_->tree->SetApplication(app);
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}
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void SearchPreview::set_library(LibraryBackend* backend) {
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backend_ = backend;
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model_ = new Playlist(nullptr, nullptr, backend_, -1, QString(), false, this);
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ui_->tree->setModel(model_);
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ui_->tree->SetPlaylist(model_);
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ui_->tree->SetItemDelegates(backend_);
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}
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void SearchPreview::Update(const Search& search) {
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if (search == last_search_) {
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// This search was the same as the last one we did
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return;
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}
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if (generator_ || isHidden()) {
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// It's busy generating something already, or the widget isn't visible
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pending_search_ = search;
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return;
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}
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RunSearch(search);
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}
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void SearchPreview::showEvent(QShowEvent* e) {
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if (pending_search_.is_valid() && !generator_) {
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// There was a search waiting while we were hidden, so run it now
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RunSearch(pending_search_);
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pending_search_ = Search();
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}
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QWidget::showEvent(e);
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}
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PlaylistItemList DoRunSearch(GeneratorPtr gen) { return gen->Generate(); }
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void SearchPreview::RunSearch(const Search& search) {
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generator_.reset(new QueryGenerator);
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generator_->set_library(backend_);
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std::dynamic_pointer_cast<QueryGenerator>(generator_)->Load(search);
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ui_->busy_container->show();
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ui_->count_label->hide();
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Future future = QtConcurrent::run(DoRunSearch, generator_);
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FutureWatcher* watcher = new FutureWatcher(this);
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watcher->setFuture(future);
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connect(watcher, SIGNAL(finished()), SLOT(SearchFinished()));
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}
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void SearchPreview::SearchFinished() {
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FutureWatcher* watcher = static_cast<FutureWatcher*>(sender());
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watcher->deleteLater();
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last_search_ =
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std::dynamic_pointer_cast<QueryGenerator>(generator_)->search();
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generator_.reset();
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if (pending_search_.is_valid() && pending_search_ != last_search_) {
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// There was another search done while we were running - throw away these
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// results and do that one now instead
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RunSearch(pending_search_);
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pending_search_ = Search();
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return;
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}
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PlaylistItemList all_items = watcher->result();
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PlaylistItemList displayed_items = all_items.mid(0, Generator::kDefaultLimit);
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model_->Clear();
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model_->InsertItems(displayed_items);
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if (displayed_items.count() < all_items.count()) {
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ui_->count_label->setText(tr("%1 songs found (showing %2)")
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.arg(all_items.count())
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.arg(displayed_items.count()));
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} else {
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ui_->count_label->setText(tr("%1 songs found").arg(all_items.count()));
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}
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ui_->busy_container->hide();
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ui_->count_label->show();
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}
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} // namespace
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