Intro to model view programming

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本文介绍了一个使用Qt框架实现的应用程序案例，该程序通过QPushButton触发不同功能，包括向QStringListModel添加、插入和删除条目。文章展示了如何初始化一个包含预设项目的列表，并演示了如何将同一个模型同时应用到QListView和QComboBox中。

#ifndef MODVIEW_H

#define MODVIEW_H

#include <QMainWindow>

#include <QtCore>

namespace Ui {

class ModView;

class ModView : public QMainWindow

    Q_OBJECT

public:

    explicit ModView(QWidget *parent = 0);

    ~ModView();

private slots:

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

    void on_pushButton_clicked();

private:

    Ui::ModView *ui;

    QStringListModel *model;

};

#endif // MODVIEW_H


cpp=====

#include "modview.h"#include "ui_modview.h"
ModView::ModView(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::ModView)
{
    ui->setupUi(this);
    model = new QStringListModel(this);
    QStringList list;
    list << "cats" << "dogs" << "birds";
    model->setStringList(list);
    ui->listView->setModel(model);
    ui->comboBox->setModel(model);
    ui->listView->setEditTriggers(QAbstractItemView::AnyKeyPressed | QAbstractItemView::DoubleClicked);
}
ModView::~ModView()
{
    delete ui;
}
void ModView::on_pushButton_2_clicked()
{
    //add
    int row = model->rowCount();
    model->insertRows(row,1);
    QModelIndex index = model->index(row);
    ui->listView->setCurrentIndex(index);
    ui->listView->edit(index);
}
void ModView::on_pushButton_3_clicked()
{
    //insert
    int row = ui->listView->currentIndex().row();
    model->insertRows(row,1);
    QModelIndex index = model->index(row);
    ui->listView->setCurrentIndex(index);
    ui->listView->edit(index);
}
void ModView::on_pushButton_clicked()
{
    //delete
    model->removeRows(ui->listView->currentIndex().row(),1);
}