// 全局下設(shè)置增加菜單
QAction *NewAction;
QAction *InsertAction;
QAction *DeleteAction;

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMenuBar>
#include <QMenu>
#include <QToolBar>
#include <iostream>

// 全局下設(shè)置增加菜單
QAction *NewAction;
QAction *InsertAction;
QAction *DeleteAction;

// By: LyShark
// https://www.cnblogs.com/lyshark
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 使用 customContextMenuRequested 信號(hào)則需要設(shè)置
    ui->listWidget->setContextMenuPolicy(Qt::CustomContextMenu);

    // 隱藏菜單欄上的右擊菜單
    this->setContextMenuPolicy(Qt::NoContextMenu);

    // 創(chuàng)建基礎(chǔ)頂部菜單
    QMenuBar *bar = menuBar();
    this->setMenuBar(bar);
    QMenu * fileMenu = bar->addMenu("菜單1");
    bar->setVisible(false);   // 隱藏頂部菜單欄

    // 添加子菜單
     NewAction = fileMenu->addAction("增加IP地址");
     InsertAction = fileMenu->addAction("插入IP地址");
     DeleteAction = fileMenu->addAction("刪除IP地址");

    // 分別設(shè)置圖標(biāo)
    NewAction->setIcon(QIcon(":/image/1.ico"));
    InsertAction->setIcon(QIcon(":/image/2.ico"));
    DeleteAction->setIcon(QIcon(":/image/3.ico"));

    // 綁定槽函數(shù)
    connect(NewAction,&QAction::triggered,this,[=](){
        std::cout << "new action" << std::endl;
        ui->plainTextEdit->appendPlainText(QString("新建觸發(fā)"));
    });

    connect(InsertAction,&QAction::triggered,this,[=](){
        std::cout << "insert action" << std::endl;
        ui->plainTextEdit->appendPlainText(QString("插入觸發(fā)"));
    });

    // 以刪除為例,演示如何刪除選中行
    connect(DeleteAction,&QAction::triggered,this,[=](){
        int row = ui->listWidget->currentRow();
        QListWidgetItem *aItem = ui->listWidget->takeItem(row);
        delete aItem;
        std::cout << "delete action" << std::endl;
        ui->plainTextEdit->appendPlainText(QString("刪除觸發(fā)"));
    });
}

MainWindow::~MainWindow()
{
    delete ui;
}

// 當(dāng)listWidget被右鍵點(diǎn)擊時(shí)則觸發(fā)
void MainWindow::on_listWidget_customContextMenuRequested(const QPoint &pos)
{
    std::cout << "x pos = "<< pos.x() << "y pos = " << pos.y() << std::endl;
    Q_UNUSED(pos);

    // 新建Menu菜單
    QMenu *ptr = new QMenu(this);

    // 添加Actions創(chuàng)建菜單項(xiàng)
    ptr->addAction(NewAction);
    ptr->addAction(InsertAction);
    // 添加一個(gè)分割線
    ptr->addSeparator();
    ptr->addAction(DeleteAction);

    // 在鼠標(biāo)光標(biāo)位置顯示右鍵快捷菜單
    ptr->exec(QCursor::pos());

    // 手工創(chuàng)建的指針必須手工刪除
    delete ptr;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMenuBar>
#include <QMenu>
#include <QToolBar>
#include <iostream>

// 全局下設(shè)置增加刪除菜單
QAction *NewAction;
QAction *InsertAction;
QAction *DeleteAction;

MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 使用 customContextMenuRequested 信號(hào)則需要設(shè)置
    ui->listWidget_2->setContextMenuPolicy(Qt::CustomContextMenu);

    // 隱藏菜單欄上的右擊菜單
    this->setContextMenuPolicy(Qt::NoContextMenu);

    // 創(chuàng)建基礎(chǔ)頂部菜單
    QMenuBar *bar = menuBar();
    this->setMenuBar(bar);
    QMenu * fileMenu = bar->addMenu("菜單1");
    bar->setVisible(false);   // 隱藏頂部菜單欄

    // 添加子菜單
     NewAction = fileMenu->addAction("增加IP地址");
     InsertAction = fileMenu->addAction("插入IP地址");
     DeleteAction = fileMenu->addAction("刪除IP地址");

    // 分別設(shè)置圖標(biāo)
    NewAction->setIcon(QIcon(":/image/1.ico"));
    InsertAction->setIcon(QIcon(":/image/2.ico"));
    DeleteAction->setIcon(QIcon(":/image/3.ico"));

    // 綁定槽函數(shù)
    connect(NewAction,&QAction::triggered,this,[=](){
        std::cout << "new action" << std::endl;
    });

    connect(InsertAction,&QAction::triggered,this,[=](){
        std::cout << "insert action" << std::endl;
    });

    // 以刪除為例,演示如何刪除選中行
    connect(DeleteAction,&QAction::triggered,this,[=](){
        int row = ui->listWidget_2->currentRow();
        QListWidgetItem *aItem = ui->listWidget_2->takeItem(row);
        delete aItem;
        std::cout << "delete action" << std::endl;
    });
	
	// 第二個(gè)ListWidget_使用圖標(biāo)方式展示
    ui->listWidget_2->setViewMode(QListView::IconMode);

    // 每一行是一個(gè)QListWidgetItem
    QListWidgetItem *aItem;

    // 設(shè)置ICON的圖標(biāo)
    QIcon aIcon;
    aIcon.addFile(":/image/1.ico");

    ui->listWidget_2->clear();
    for(int x=0;x<10;x++)
    {
        QString str = QString::asprintf("admin_%d",x);
        aItem = new QListWidgetItem();   // 新建一個(gè)項(xiàng)

        aItem->setText(str);                   // 設(shè)置文字標(biāo)簽
        aItem->setIcon(aIcon);                 // 設(shè)置圖標(biāo)
        //aItem->setCheckState(Qt::Checked);     // 設(shè)為選中狀態(tài)
        aItem->setFlags(Qt::ItemIsSelectable |  // 設(shè)置為不可編輯狀態(tài)
                         Qt::ItemIsUserCheckable
                        |Qt::ItemIsEnabled);

        ui->listWidget_2->addItem(aItem); //增加項(xiàng)
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}

// By: LyShark
// https://www.cnblogs.com/lyshark
void MainWindow::on_listWidget_2_customContextMenuRequested(const QPoint &pos)
{
    std::cout << "x pos = "<< pos.x() << "y pos = " << pos.y() << std::endl;
    Q_UNUSED(pos);

    // 新建Menu菜單
    QMenu *ptr = new QMenu(this);

    // 添加Actions創(chuàng)建菜單項(xiàng)
    ptr->addAction(NewAction);
    ptr->addAction(InsertAction);
    // 添加一個(gè)分割線
    ptr->addSeparator();
    ptr->addAction(DeleteAction);

    // 在鼠標(biāo)光標(biāo)位置顯示右鍵快捷菜單
    ptr->exec(QCursor::pos());

    // 手工創(chuàng)建的指針必須手工刪除
    delete ptr;
}