058-第三代软件开发-文件Model

第三代软件开发-文件Model

文章目录

• 第三代软件开发-文件Model

关键字： Qt、 Qml、 关键字3、 关键字4、 关键字5

项目介绍

重要说明☝

☀该专栏在第三代软开发更新完将涨价

文件Model

这个就是想做一个通用一点的model，因为我需要知道我的文件夹下的mp4 和pdf 文件，这两个除了类型不同，其他功能都相同，所以就有了这个，代码如下

头文件

#ifndef XXXX_FILEMODEL_H
#define XXXX_FILEMODEL_H

#include <QAbstractListModel>




class XXXX_FileModel : public QAbstractListModel
{
    Q_OBJECT
    enum FileType
    {
        Name,
    };

    Q_PROPERTY(QString path READ path WRITE setPath NOTIFY pathChanged FINAL)

public:
    explicit XXXX_FileModel(QObject *parent = nullptr);

    // Header:
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;

    bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role = Qt::EditRole) override;

    // Basic functionality:
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;

    // Fetch data dynamically:
    bool hasChildren(const QModelIndex &parent = QModelIndex()) const override;

    bool canFetchMore(const QModelIndex &parent) const override;
    void fetchMore(const QModelIndex &parent) override;

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    QHash<int,QByteArray> roleNames() const override;

    // Editable:
    bool setData(const QModelIndex &index, const QVariant &value,
                 int role = Qt::EditRole) override;

    Qt::ItemFlags flags(const QModelIndex& index) const override;

    // Add data:
    bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex()) override;

    // Remove data:
    bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex()) override;

    QString path() const;
    void setPath(const QString &newPath);

signals:
    void pathChanged();

protected:
    void updateFile();

private:
    QString m_path = "/home";
    QStringList m_fileList;
};

#endif // XXXX_FILEMODEL_H

源文件

#include "XXXX_filemodel.h"
#include "qdebug.h"
#include "qdir.h"

XXXX_FileModel::XXXX_FileModel(QObject *parent)
    : QAbstractListModel(parent)
{
    updateFile();
}

QVariant XXXX_FileModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    // FIXME: Implement me!
}

bool XXXX_FileModel::setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role)
{
    if (value != headerData(section, orientation, role)) {
        // FIXME: Implement me!
        emit headerDataChanged(orientation, section, section);
        return true;
    }
    return false;
}

int XXXX_FileModel::rowCount(const QModelIndex &parent) const
{
    // For list models only the root node (an invalid parent) should return the list's size. For all
    // other (valid) parents, rowCount() should return 0 so that it does not become a tree model.
    if (parent.isValid())
        return 0;
    // FIXME: Implement me!
    return m_fileList.count();
}

bool XXXX_FileModel::hasChildren(const QModelIndex &parent) const
{
    // FIXME: Implement me!
}

bool XXXX_FileModel::canFetchMore(const QModelIndex &parent) const
{
    // FIXME: Implement me!
    return false;
}

void XXXX_FileModel::fetchMore(const QModelIndex &parent)
{
    // FIXME: Implement me!
}

QVariant XXXX_FileModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();

    // FIXME: Implement me!


    if(m_fileList.count() > 0)
        return m_fileList.at(index.row());



    return QVariant();
}

QHash<int, QByteArray> XXXX_FileModel::roleNames() const
{
    QHash<int,QByteArray> roles;
    roles.insert(FileType::Name,"name");
    return roles;
}

bool XXXX_FileModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (data(index, role) != value) {
        // FIXME: Implement me!
        emit dataChanged(index, index, {role});
        return true;
    }
    return false;
}

Qt::ItemFlags XXXX_FileModel::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return Qt::NoItemFlags;

    return QAbstractItemModel::flags(index) | Qt::ItemIsEditable; // FIXME: Implement me!
}

bool XXXX_FileModel::insertRows(int row, int count, const QModelIndex &parent)
{
    beginInsertRows(parent, row, row + count - 1);
    // FIXME: Implement me!
    endInsertRows();
    return true;
}

bool XXXX_FileModel::removeRows(int row, int count, const QModelIndex &parent)
{
    beginRemoveRows(parent, row, row + count - 1);
    // FIXME: Implement me!
    endRemoveRows();
    return true;
}

QString XXXX_FileModel::path() const
{
    return m_path;
}

void XXXX_FileModel::setPath(const QString &newPath)
{
    if (m_path == newPath)
        return;
    m_path = newPath;
    emit pathChanged();
    updateFile();
}

void XXXX_FileModel::updateFile()
{
    QDir folder(m_path);
    m_fileList.clear();
    m_fileList = folder.entryList(QDir::Files);
    foreach(QString file, m_fileList)
    {
        qDebug() << file;
    }
}

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