this is my wlanmode.cpp

#include "wlanmodel.h"
#include <networkinterface.h>
#include <QImage>
#include "union-dbus-network-interface.h"


const int NM_DEVICE_TYPE_WIFI = 2;
const int CONNECT_TYPE_WIRELESS = 14;

WlanModel::WlanModel(QObject *parent)
    : QAbstractListModel(parent)
{
    //m_data = UnionNetworkDBusInterface::Instance()->networkInterface()->wifiList();
    //m_data<<"redflag_5G1"<<"redflag_5G2"<<"redflag_5G3"<<"redflag_5G4"<<"redflag_5G5"<<"redflag_5G6";
    m_data.insert("redflag_5G1",":/strongwlansignal.svg");
    m_data.insert("redflag_5G2",":/strongwlansignal.svg");
    m_data.insert("redflag_5G3",":/strongwlansignal.svg");
    m_data.insert("redflag_5G4",":/strongwlansignal.svg");
    m_data.insert("redflag_5G5",":/strongwlansignal.svg");
    m_data.insert("redflag_5G6",":/strongwlansignal.svg");
    m_data.insert("redflag_5G7",":/strongwlansignal.svg");
    qDebug()<<"--------variantmap"<<m_data;

}

int WlanModel::rowCount(const QModelIndex &parent) const
{
    return parent.isValid() ? 0 : m_data.size();
}

QVariant WlanModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();
    if (role == Qt::DisplayRole) {
        return m_data.keys().at(index.row());
    } else if (role == Qt::DecorationRole) {
        return QImage(m_data.values().at(index.row()).toString());
    }
    return QVariant();
}

QString WlanModel::getKey(int index) const
{
    QStringList keys = m_data.keys();
    qDebug()<<"keys ===="<<keys;
    return index >= 0 && index < keys.size() ? keys.at(index) : QString();
}

QVariant WlanModel::getValueByKey(const QString &key) const
{
    return m_data.value(key, QVariant());
}

this is my wlandelegate.cpp

#include "wlandelegate.h"
#include <QPainter>
#include <QImage>
#include <QApplication>
#include <QPushButton>
#include <QBoxLayout>
#include <QDebug>
#include <rf-widget/rlabel.h>
#include <rf-widget/rbackgroundframe.h>
#include <rf-widget/rpushbutton.h>

#define TableControllerSpacing 20

WlanDelegate::WlanDelegate(QListView *listView,QObject *parent)
    : QStyledItemDelegate(parent),
      m_listView(listView)
{
}

void WlanDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    painter->save();
    // 获取项的矩形区域
    QRect rect = option.rect;

    // 如果需要选中效果，设置不同的背景颜色
    if (option.state & QStyle::State_Selected) {
        painter->fillRect(rect, option.palette.color(QPalette::Window).lighter());
        //p.setBrush(opt.palette.color(QPalette::Window).lighter());
    } else {
        painter->fillRect(rect, option.palette.base());
    }

    QStyleOptionViewItem opt = option;
    // 禁用焦点框的绘制
    opt.state &= ~QStyle::State_HasFocus;

    // 调用父类的绘制行为
    QStyledItemDelegate::paint(painter, opt, index);

    // 恢复绘制状态
    painter->restore();
}

QSize WlanDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    return QSize(300, 82);  // 设置每一项的大小
}

QWidget *WlanDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QWidget *editor = new QWidget(parent);
    editor->setLayout(new QHBoxLayout(editor));  // 设置布局，具体的控件将在setEditorData中添加
    return editor;
}

void WlanDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{

    // 清除既有布局中的所有控件
    QLayout *pLayout = editor->layout();
    QLayoutItem *item;
    while ((item = pLayout->takeAt(0)) != nullptr)
    {
        delete item->widget();
        delete item;
    }

    // 创建并添加新的控件
//    QLabel *iconLabel = new QLabel(editor);
//    QLabel *textLabel = new QLabel(editor);
//    QImage wlanImage;
//    wlanImage.load(index.data(Qt::DecorationRole).toString());
//    iconLabel->setPixmap(QPixmap::fromImage(wlanImage));
    QString key = index.data(Qt::DisplayRole).toString();
//    textLabel->setText(key);
    QPushButton *pConnectAndDisconnectButton = new QPushButton(editor);
    pConnectAndDisconnectButton->setText(key);
    QHBoxLayout *pHlayout = new QHBoxLayout(editor);
    QSpacerItem* tabelControllerspacing = new QSpacerItem(TableControllerSpacing, 0, QSizePolicy::Minimum, QSizePolicy::Minimum);
    pHlayout->addSpacerItem(tabelControllerspacing);
    pHlayout->setContentsMargins(100,0,30,0);
//    pHlayout->addWidget(iconLabel);
//    pHlayout->addWidget(textLabel);
    pHlayout->addWidget(pConnectAndDisconnectButton);
    editor->setLayout(pHlayout);
}

void WlanDelegate::setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const
{
}

void WlanDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const
{

}

in setEditorData function i init my layout then

this is my using of wlanmode mvc in my mainwindow

 WlanDelegate *delegate = new WlanDelegate(m_pListView, this);
 m_pListView->setItemDelegate(delegate);
 m_pMainLayout->addWidget(m_pTitlebackgroundFrame);
 m_pMainLayout->addWidget(m_pListView);
 setLayout(m_pMainLayout);

then i get a image

enter image description here

then no matter how i change setEditorData function,i always get the picture up,why my setEditorData function doesn’t work later.

i change my code here

void WlanDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const
{

    editor->setFixedSize(300,82);
    QLayout *pLayout = editor->layout();
    QLayoutItem *item;
    while ((item = pLayout->takeAt(0)) != nullptr)
    {
        delete item->widget();
        delete item;
    }

    // 创建并添加新的控件
    QLabel *iconLabel = new QLabel(editor);
    QLabel *textLabel = new QLabel(editor);
    QImage wlanImage;
    wlanImage.load(index.data(Qt::DecorationRole).toString());
    iconLabel->setPixmap(QPixmap::fromImage(wlanImage));
    QString key = index.data(Qt::DisplayRole).toString();
    textLabel->setText(key);
    QPushButton *pConnectAndDisconnectButton = new QPushButton(editor);
    pConnectAndDisconnectButton->setText(key);
    QHBoxLayout *pHlayout = new QHBoxLayout(editor);
    QSpacerItem* tabelControllerspacing = new QSpacerItem(TableControllerSpacing, 0, QSizePolicy::Minimum, QSizePolicy::Minimum);
    pHlayout->addSpacerItem(tabelControllerspacing);
    pHlayout->setContentsMargins(100,0,30,0);
    pHlayout->addWidget(iconLabel);
    pHlayout->addWidget(textLabel);
    pHlayout->addWidget(pConnectAndDisconnectButton);
    editor->setLayout(pHlayout);
}

and addSpacindg,setContetMargin doesn’t work,i expect that they can work and i hope i can add new controllers.