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#include <DataSource/DataSourceWidget.h>
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#include <ui_DataSourceWidget.h>
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#include <DataSource/DataSourceItem.h>
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#include <DataSource/DataSourceTreeWidgetHelper.h>
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#include <DataSource/DataSourceTreeWidgetItem.h>
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#include <QMenu>
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namespace
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{
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/// Number of columns displayed in the tree
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const auto TREE_NB_COLUMNS = 1;
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/// Header labels for the tree
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const auto TREE_HEADER_LABELS = QStringList { QObject::tr("Name") };
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/**
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* Creates the item associated to a data source
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* @param dataSource the data source for which to create the item
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* @return the new item
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*/
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DataSourceTreeWidgetItem* createTreeWidgetItem(DataSourceItem* dataSource)
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{
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// Creates item for the data source
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auto item = new DataSourceTreeWidgetItem { dataSource };
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// Generates items for the children of the data source
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std::for_each(dataSource->cbegin(), dataSource->cend(),
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[&item](const std::unique_ptr<DataSourceItem>& child) {
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item->addChild(createTreeWidgetItem(child.get()));
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});
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return item;
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}
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} // namespace
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DataSourceWidget::DataSourceWidget(QWidget* parent)
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: QWidget { parent }
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, ui { new Ui::DataSourceWidget }
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, m_Root { std::make_unique<DataSourceItem>(
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DataSourceItemType::NODE, QStringLiteral("Sources")) }
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{
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ui->setupUi(this);
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// Set tree properties
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ui->treeWidget->setColumnCount(TREE_NB_COLUMNS);
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ui->treeWidget->setHeaderLabels(TREE_HEADER_LABELS);
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ui->treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);
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// Connection to show a menu when right clicking on the tree
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connect(ui->treeWidget, &QTreeWidget::customContextMenuRequested, this,
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&DataSourceWidget::onTreeMenuRequested);
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// Connection to filter tree
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connect(ui->filterLineEdit, &QLineEdit::textChanged, this, &DataSourceWidget::filterChanged);
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// First init
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updateTreeWidget();
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}
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DataSourceWidget::~DataSourceWidget() noexcept
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{
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delete ui;
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}
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void DataSourceWidget::addDataSource(DataSourceItem* dataSource) noexcept
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{
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// Merges the data source (without taking its root)
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if (dataSource)
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{
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std::for_each(std::cbegin(*dataSource), std::cend(*dataSource),
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[this](const auto& child) { this->m_Root->merge(*child.get()); });
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updateTreeWidget();
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}
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}
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void DataSourceWidget::updateTreeWidget() noexcept
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{
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ui->treeWidget->clear();
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auto rootItem = createTreeWidgetItem(m_Root.get());
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ui->treeWidget->addTopLevelItem(rootItem);
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rootItem->setExpanded(true);
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// Sorts tree
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ui->treeWidget->setSortingEnabled(true);
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ui->treeWidget->sortByColumn(0, Qt::AscendingOrder);
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}
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void DataSourceWidget::filterChanged(const QString& text) noexcept
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{
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auto validateItem = [&text](const DataSourceTreeWidgetItem& item) {
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auto regExp = QRegExp { text, Qt::CaseInsensitive, QRegExp::Wildcard };
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// An item is valid if any of its metadata validates the text filter
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auto itemMetadata = item.data()->data();
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auto itemMetadataEnd = itemMetadata.cend();
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auto acceptFilter
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= [®Exp](const auto& variant) { return variant.toString().contains(regExp); };
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return std::find_if(itemMetadata.cbegin(), itemMetadataEnd, acceptFilter)
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!= itemMetadataEnd;
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};
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// Applies filter on tree widget
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DataSourceTreeWidgetHelper::filter(*ui->treeWidget, validateItem);
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}
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void DataSourceWidget::onTreeMenuRequested(const QPoint& pos) noexcept
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{
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// Retrieves the selected item in the tree, and build the menu from its actions
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if (auto selectedItem = dynamic_cast<DataSourceTreeWidgetItem*>(ui->treeWidget->itemAt(pos)))
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{
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QMenu treeMenu {};
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treeMenu.addActions(selectedItem->actions());
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if (!treeMenu.isEmpty())
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{
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treeMenu.exec(QCursor::pos());
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}
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}
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}
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