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https://github.com/saitohirga/WSJT-X.git
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94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
#include "CheckableItemComboBox.hpp"
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#include <QStyledItemDelegate>
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#include <QStandardItemModel>
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#include <QStandardItem>
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#include <QLineEdit>
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#include <QEvent>
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#include <QListView>
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class CheckableItemComboBoxStyledItemDelegate
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: public QStyledItemDelegate
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{
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public:
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explicit CheckableItemComboBoxStyledItemDelegate (QObject * parent = nullptr)
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: QStyledItemDelegate {parent}
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{
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}
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void paint (QPainter * painter, QStyleOptionViewItem const& option, QModelIndex const& index) const override
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{
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QStyleOptionViewItem& mutable_option = 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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: QComboBox {parent}
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, model_ {new QStandardItemModel()}
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{
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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(), &QLineEdit::deselect);
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connect (static_cast<QListView *> (view ()), &QListView::pressed, this, &CheckableItemComboBox::item_pressed);
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connect (model_.data (), &QStandardItemModel::dataChanged, this, &CheckableItemComboBox::model_data_changed);
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}
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QStandardItem * CheckableItemComboBox::addCheckItem (QString const& label, QVariant const& data
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, Qt::CheckState checkState)
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{
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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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{
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if (object == lineEdit() && event->type () == QEvent::MouseButtonPress)
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{
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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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{
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QString text;
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for (int i = 0; i < model_->rowCount (); ++i)
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{
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if (model_->item (i)->checkState () == Qt::Checked)
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{
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if (text.size ())
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{
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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 ()
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{
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update_text ();
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}
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void CheckableItemComboBox::item_pressed (QModelIndex const& index)
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{
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QStandardItem * item = model_->itemFromIndex (index);
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item->setCheckState (item->checkState () == Qt::Checked ? Qt::Unchecked : Qt::Checked);
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}
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#include "widgets/moc_CheckableItemComboBox.cpp"
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