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DataSourceWidget.cpp
100 lines | 3.1 KiB | text/x-c | CppLexer
#include <DataSource/DataSourceWidget.h>
#include <ui_DataSourceWidget.h>
#include <DataSource/DataSourceItem.h>
#include <DataSource/DataSourceTreeWidgetHelper.h>
#include <DataSource/DataSourceTreeWidgetItem.h>
#include <QMenu>
namespace {
/// Number of columns displayed in the tree
const auto TREE_NB_COLUMNS = 1;
/// Header labels for the tree
const auto TREE_HEADER_LABELS = QStringList{QObject::tr("Name")};
/**
* Creates the item associated to a data source
* @param dataSource the data source for which to create the item
* @return the new item
*/
DataSourceTreeWidgetItem *createTreeWidgetItem(DataSourceItem *dataSource)
{
// Creates item for the data source
auto item = new DataSourceTreeWidgetItem{dataSource};
// Generates items for the children of the data source
for (auto i = 0; i < dataSource->childCount(); ++i) {
item->addChild(createTreeWidgetItem(dataSource->child(i)));
}
return item;
}
} // namespace
DataSourceWidget::DataSourceWidget(QWidget *parent) : QWidget{parent}, ui{new Ui::DataSourceWidget}
{
ui->setupUi(this);
// Set tree properties
ui->treeWidget->setColumnCount(TREE_NB_COLUMNS);
ui->treeWidget->setHeaderLabels(TREE_HEADER_LABELS);
ui->treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);
// Connection to show a menu when right clicking on the tree
connect(ui->treeWidget, &QTreeWidget::customContextMenuRequested, this,
&DataSourceWidget::onTreeMenuRequested);
// Connection to filter tree
connect(ui->filterLineEdit, &QLineEdit::textChanged, this, &DataSourceWidget::filterChanged);
}
DataSourceWidget::~DataSourceWidget() noexcept
{
delete ui;
}
void DataSourceWidget::addDataSource(DataSourceItem *dataSource) noexcept
{
// Creates the item associated to the source and adds it to the tree widget. The tree widget
// takes the ownership of the item
if (dataSource) {
ui->treeWidget->addTopLevelItem(createTreeWidgetItem(dataSource));
}
}
void DataSourceWidget::filterChanged(const QString &text) noexcept
{
auto validateItem = [&text](const DataSourceTreeWidgetItem &item) {
auto regExp = QRegExp{text, Qt::CaseInsensitive, QRegExp::Wildcard};
// An item is valid if any of its metadata validates the text filter
auto itemMetadata = item.data()->data();
auto itemMetadataEnd = itemMetadata.cend();
auto acceptFilter
= [&regExp](const auto &variant) { return variant.toString().contains(regExp); };
return std::find_if(itemMetadata.cbegin(), itemMetadataEnd, acceptFilter)
!= itemMetadataEnd;
};
// Applies filter on tree widget
DataSourceTreeWidgetHelper::filter(*ui->treeWidget, validateItem);
}
void DataSourceWidget::onTreeMenuRequested(const QPoint &pos) noexcept
{
// Retrieves the selected item in the tree, and build the menu from its actions
if (auto selectedItem = dynamic_cast<DataSourceTreeWidgetItem *>(ui->treeWidget->itemAt(pos))) {
QMenu treeMenu{};
treeMenu.addActions(selectedItem->actions());
if (!treeMenu.isEmpty()) {
treeMenu.exec(QCursor::pos());
}
}
}