QtNovelUI/TestWidget/widget.cpp

#include "widget.h"
#include "tools.h"

#include <QPushButton>
#include <QTreeView>
#include <QVBoxLayout>

Widget::Widget(QWidget *parent)
    : QWidget(parent), model(new QStandardItemModel(this))
{
    auto layout = new QVBoxLayout(this);
    auto widget = new QTreeView(this);
    layout->addWidget(widget);
    widget->setModel(model);


    Tools::ModelSyncs<QString>* xmodel = new Tools::ModelSyncs<QString>(model,
                               [](const QString &d, QStandardItem *n){return d == n->text();},
    [](const QString &d, QStandardItem *i){i->setText(d);});

    model->appendRow(new QStandardItem("sldkjflkdf"));

    auto button = new QPushButton("click");
    layout->addWidget(button);

    connect(button,     &QPushButton::clicked,   [this, xmodel](){
        xmodel->presentSync([](const QString &x){
            if(x.length() > 3)
                return QList<QString>();

            return QList<QString>() << x + "a" << x + "b" << x + "c" << x + "d";
        });
    });
}

Widget::~Widget()
{
}