(二)使用预定义模型 QStringListModel例子

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目录：

(一) Qt Model/View 的简单说明 、预定义模型

(二)使用预定义模型 QstringListModel例子

(三)使用预定义模型QDirModel的例子

(四)Qt实现自定义模型基于QAbstractTableModel

(五)Qt实现自定义模型基于QAbstractItemModel 

(六) Qt实现自定义委托 QDelegate

 

使用预定义模型 QStringListModel例子

 

源代码如下

Main.cpp

 

#include 

#include "teamleadersdialog.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    //字符串数组
    QStringList leaders;
    leaders << "Stooge Viller" << "Littleface" << "B-B Eyes"
            << "Pruneface" << "Mrs. Pruneface" << "The Brow"
            << "Vitamin Flintheart" << "Flattop Sr." << "Shakey"
            << "Breathless Mahoney" << "Mumbles" << "Shoulders"
            << "Sketch Paree";

    //对话框
    TeamLeadersDialog dialog(leaders);
    dialog.show();

    return app.exec();
}

 

 

teamleadersdialog.h

 

#ifndef TEAMLEADERSDIALOG_H
#define TEAMLEADERSDIALOG_H

#include 

class QDialogButtonBox;
class QListView;
class QStringListModel;

class TeamLeadersDialog : public QDialog
{
    Q_OBJECT

public:
    //构造函数
    TeamLeadersDialog(const QStringList &leaders, QWidget *parent = 0);

    QStringList leaders() const;

private slots:
    void insert();
    void del();

private:
    QListView *listView;
    QDialogButtonBox *buttonBox;
    QStringListModel *model;
};

#endif

 

teamleadersdialog.cpp

 

#include 

#include "teamleadersdialog.h"

TeamLeadersDialog::TeamLeadersDialog(const QStringList &leaders,
                                     QWidget *parent)
    : QDialog(parent)
{
    //创建并组装一个QStringListModel
    model = new QStringListModel(this);
    model->setStringList(leaders);

    //创建一个QListView
    listView = new QListView;
    //设置模型
    listView->setModel(model);
    //设置QListView编辑触发器：通过开始输入或者双击进入编辑字符串的状态
    listView->setEditTriggers(QAbstractItemView::AnyKeyPressed
                              | QAbstractItemView::DoubleClicked);
    //
    buttonBox = new QDialogButtonBox();
    QPushButton *insertButton = buttonBox->addButton(tr("&Insert"),
            QDialogButtonBox::ActionRole);
    QPushButton *deleteButton = buttonBox->addButton(tr("&Delete"),
            QDialogButtonBox::ActionRole);
    buttonBox->addButton(QDialogButtonBox::Ok);
    buttonBox->addButton(QDialogButtonBox::Cancel);
    //信号槽绑定插入、删除按钮
    connect(insertButton, SIGNAL(clicked()), this, SLOT(insert()));
    connect(deleteButton, SIGNAL(clicked()), this, SLOT(del()));
    //按钮盒的ok和Cancel事件
    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    //界面竖直布局listView和buttonBox
    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(listView);
    mainLayout->addWidget(buttonBox);
    //设置当前窗口的布局为mainLayout
    setLayout(mainLayout);

    setWindowTitle(tr("Team Leaders"));
}
//获取当前模型中的内容
QStringList TeamLeadersDialog::leaders() const
{
    return model->stringList();
}

void TeamLeadersDialog::insert()
{
    //从列表视图得到当前项的行数
    int row = listView->currentIndex().row();
    //在模型中插入一个新行，并且模型会自动更新列表视图
    model->insertRows(row, 1);
    //获取当前行在模型中的"模型索引"
    QModelIndex index = model->index(row);
    //设置刚刚插入的空白行为列表视图的当前索引
    listView->setCurrentIndex(index);
    //设置列表视图在当前行进入编辑状态
    listView->edit(index);
}

void TeamLeadersDialog::del()
{
    //从目前行开始，共删除1行model数据，并自动更新列表视图
    model->removeRows(listView->currentIndex().row(), 1);
}