Multilist.h

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#pragma once
#ifndef MULTILIST
#define MULTILIST
 
#include <QtWidgets>
 
class MultiList : public QComboBox {
    Q_OBJECT
 
private:
    QString displayText;
    QStandardItemModel* model;
 
public:
    MultiList(QWidget* parent = 0) : QComboBox(parent) {
        setEditable(true);
 
        displayText = "";
        model = new QStandardItemModel;
        slotUpdateText();
 
        connect(model, SIGNAL(itemChanged(QStandardItem*)), this, SLOT(slotUpdate()));
    }
 
    void addItem(const QString& text) {
        int row = model->rowCount();
        QStandardItem* item = new QStandardItem();
        item->setText(text);
        item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
        item->setData(Qt::Unchecked, Qt::CheckStateRole);
        model->setItem(row, 0, item);
        this->setModel(model);
    }
 
    void addItems(const QStringList& texts) {
        for (int i = 0; i < texts.count(); i++) {
            addItem(texts.at(i));
        }
    }
 
    QStringList getCheckedItems() const {
        QStringList checkedItems;
 
        for (int i = 0; i < model->rowCount(); i++) {
            if (model->item(i, 0)->checkState() == Qt::Checked) {
                checkedItems << model->item(i, 0)->text();
            }
        }
 
        return checkedItems;
    }
 
    void setCheckedItems(const QStringList& items) {
        for (int i = 0; i < items.count(); i++) {
            int index = findText(items.at(i));
 
            if (index != -1) {
                model->item(index)->setData(Qt::Checked, Qt::CheckStateRole);
            }
        }
 
        slotUpdate();
    }
 
public slots:
    void slotUpdateText() {
        lineEdit()->setText(displayText);
    }
 
    void slotUpdate() {
        displayText = "";
 
        for (int i = 0; i < model->rowCount(); i++) {
            if (model->item(i, 0)->checkState() == Qt::Checked) {
                displayText = displayText + model->item(i, 0)->text() + "; ";
            }
        }
 
        QTimer::singleShot(0, this, SLOT(slotUpdateText()));
    }
};
 
 
#endif