mirror of
https://github.com/JS8Call-improved/JS8Call-improved
synced 2026-08-13 17:47:36 -04:00
88 lines
3 KiB
C++
88 lines
3 KiB
C++
/**
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* @file CheckableItemComboBox.cpp
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* @brief QComboBox with support of checkboxes
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* http://stackoverflow.com/questions/8422760/combobox-of-checkboxes
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*/
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#include "CheckableItemComboBox.h"
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#include <QEvent>
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#include <QLineEdit>
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#include <QListView>
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#include <QStandardItem>
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#include <QStandardItemModel>
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#include <QStyledItemDelegate>
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class CheckableItemComboBoxStyledItemDelegate : public QStyledItemDelegate {
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public:
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explicit CheckableItemComboBoxStyledItemDelegate(QObject *parent = nullptr)
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: QStyledItemDelegate{parent} {}
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void paint(QPainter *painter, QStyleOptionViewItem const &option,
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QModelIndex const &index) const override {
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QStyleOptionViewItem &mutable_option =
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const_cast<QStyleOptionViewItem &>(option);
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mutable_option.showDecorationSelected = false;
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QStyledItemDelegate::paint(painter, mutable_option, index);
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}
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};
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CheckableItemComboBox::CheckableItemComboBox(QWidget *parent)
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: LazyFillComboBox{parent}, model_{new QStandardItemModel()} {
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setModel(model_.data());
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setEditable(true);
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lineEdit()->setReadOnly(true);
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lineEdit()->installEventFilter(this);
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setItemDelegate(new CheckableItemComboBoxStyledItemDelegate{this});
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connect(lineEdit(), &QLineEdit::selectionChanged, lineEdit(),
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&QLineEdit::deselect);
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connect(static_cast<QListView *>(view()), &QListView::pressed, this,
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&CheckableItemComboBox::item_pressed);
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connect(model_.data(), &QStandardItemModel::dataChanged, this,
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&CheckableItemComboBox::model_data_changed);
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}
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QStandardItem *CheckableItemComboBox::addCheckItem(QString const &label,
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QVariant const &data,
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Qt::CheckState checkState) {
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auto *item = new QStandardItem{label};
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item->setCheckState(checkState);
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item->setData(data);
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item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
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model_->appendRow(item);
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update_text();
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return item;
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}
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bool CheckableItemComboBox::eventFilter(QObject *object, QEvent *event) {
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if (object == lineEdit() && event->type() == QEvent::MouseButtonPress) {
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showPopup();
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return true;
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}
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return false;
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}
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void CheckableItemComboBox::update_text() {
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QString text;
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for (int i = 0; i < model_->rowCount(); ++i) {
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if (model_->item(i)->checkState() == Qt::Checked) {
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if (text.size()) {
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text += ", ";
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}
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text += model_->item(i)->data().toString();
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}
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}
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lineEdit()->setText(text);
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}
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void CheckableItemComboBox::model_data_changed() { update_text(); }
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void CheckableItemComboBox::item_pressed(QModelIndex const &index) {
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QStandardItem *item = model_->itemFromIndex(index);
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item->setCheckState(item->checkState() == Qt::Checked ? Qt::Unchecked
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: Qt::Checked);
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}
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#include "moc_CheckableItemComboBox.cpp"
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