QT QListwidgetItem

#include "listitem.h"

#include "ui_listitem.h"

#include <QListView>

#include <QListWidgetItem>

#include <QObject>

#include <QString>

#include <QDebug>

#include <QtSql/QSqlDatabase>

#include <ctime>

#include <QTime>

listitem::listitem(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::listitem)

    ui->setupUi(this);

    ui->listWidget->setViewMode(QListView::IconMode);//设置显示模式为图标模式

    //ui->listWidget->setViewMode(QListView::ListMode);

    InsertIcon();//添加目录图片文件名称

    this->setMaximumSize(421,444);

    this->setMinimumSize(421,444);

    QListWidgetItem *IconItem=new QListWidgetItem(QIcon(":/new/prefix1/image/164-font.png"),tr("深圳"),ui->listWidget);//添加QListWidgetItem项目

    QListWidgetItem *IconItem1=new QListWidgetItem(QIcon(":/new/prefix1/image/cut.png"),tr("天津"),ui->listWidget);//添加QListWidgetItem

    QListWidgetItem *IconItem2=new QListWidgetItem(QIcon(":/new/prefix1/image/convert.png"),tr("上海"),ui->listWidget);//添加QListWidgetItem项目

    QObject::connect(ui->pushButton,SIGNAL(clicked()),this,SLOT(addCitySlot()));//添加项

    QObject::connect(ui->lineEdit,SIGNAL(returnPressed()),this,SLOT(addCitySlot()));//添加回车键入

    QObject::connect(ui->pushButton_2,SIGNAL(clicked()),this,SLOT(deleteCitySlot()));//删除选项

    QObject::connect(ui->pushButton_3,SIGNAL(clicked()),this,SLOT(deleteAllSlot()));//删除所有项

    QObject::connect(ui->pushButton_4,SIGNAL(clicked()),this,SLOT(showDirSlot()));//导入目录

    QObject::connect(ui->listWidget,SIGNAL(itemClicked(QListWidgetItem*)),this,SLOT(singleClickedSlot(QListWidgetItem*)));//左键单击

    QObject::connect(ui->listWidget,SIGNAL(itemDoubleClicked(QListWidgetItem*)),this,SLOT(doubleClickedSlot(QListWidgetItem*)));//右键双击

    //QObject::connect(ui->listWidget,SIGNAL(itemChanged(QListWidgetItem*)),this,SLOT(singleClickedSlot(QListWidgetItem*)));

listitem::~listitem()

    delete ui;

void listitem::addCitySlot()

    //create a item add to litwidget

    QString cityName=ui->lineEdit->text();

    if(!cityName.isEmpty())

        srand((unsigned)time(0));//设置随机种子

        //qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));

        int ran_num=rand()%23;

        int a;

        for(int i=0;i<ran_num;i++)

            srand((unsigned)time(0));//设置随机种子

            a=rand()%23;

        QListWidgetItem *IconItem=new QListWidgetItem(QIcon(":/new/prefix1/image/"+IconList->at(a)),cityName,ui->listWidget);

        //QListWidgetItem *item=new QListWidgetItem;

        //item->setText(cityName);

        //ui->listWidget->addItem(item);

        ui->lineEdit->setText("");

    else

        QMessageBox::information(this,"Send Error","录入的内容不能为空!!");

void listitem::deleteCitySlot()

    //create a item delete to litwidget

    QString cityName=ui->lineEdit->text();

    if(ui->listWidget->count()>0)

        if(!cityName.isEmpty())

            int index=ui->listWidget->count();

            for(int n=0;n<index;n++)

                if(ui->listWidget->item(n)->text()==cityName)

                    delete ui->listWidget->item(n);

        else

            QListWidgetItem *item=ui->listWidget->takeItem(ui->listWidget->currentRow());//光标选中的当前行

            delete item;

    else

        QMessageBox::information(this,"System Send Err!!","列表内容无为空!!");

void listitem::deleteAllSlot()

    int counter=ui->listWidget->count();//获取列表项的总数目

    ui->listWidget->setFocus();//将光标设置到表框上，若注释该语

    for(int index=0;index<counter;index++)

        //QListWidgetItem *item=ui->listWidget->takeItem(index);

        QListWidgetItem *item=ui->listWidget->takeItem(ui->listWidget->currentRow());

        delete item;

void listitem::showDirSlot()

    //QStringList fileNames=QFileDialog::getOpenFileNames(this,"Open File",QDir::currentPath());

    ui->listWidget->clear();

    QDir dir=QDir::current();

    QStringList fileNames=dir.entryList();

    if(fileNames.size()==0)

        QMessageBox::information(this,"Error Message","No File Select");

        return;

    for(int index=0;index<fileNames.size();index++)

        if(fileNames.at(index)!="."&&fileNames.at(index)!="..")

            srand((unsigned)time(0));//设置随机种子

            //qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));

            int ran_num=rand()%23;

            int a;

            for(int i=0;i<ran_num;i++)

                srand((unsigned)time(0));//设置随机种子

                a=rand()%23;

            QListWidgetItem *IconItem=new QListWidgetItem(QIcon(":/new/prefix1/image/"+IconList->at(a)),fileNames.at(index),ui->listWidget);

            //QListWidgetItem *item=new QListWidgetItem;

            //item->setText(fileNames.at(index));

            //ui->listWidget->addItem(item);

void listitem::singleClickedSlot(QListWidgetItem *item)

    QMessageBox::information(this,"information","single clicked text is:"+item->text());

void listitem::doubleClickedSlot(QListWidgetItem *item)

    QMessageBox::information(this,"information","double clicked text is:"+item->text());

void listitem::InsertIcon()

    //qDebug()<<"PATH1:"<<QCoreApplication::applicationDirPath();

    //qDebug()<<"PATH2:"<<QDir::currentPath();

    //QMessageBox::information(this,"Path1",QCoreApplication::applicationDirPath());

    //QMessageBox::information(this,"Path2",QDir::currentPath());

    QString path=QDir::currentPath()+"/image";//读取执行目录地址

    QDir dir(path);//设置路径

    QFileInfoList file_list=dir.entryInfoList(QDir::Files|QDir::Hidden|QDir::NoSymLinks);

    for(int i=0;i!=file_list.size();i++)

        QString name=file_list.at(i).fileName();//读取路径下文件名称

        IconList->append(name);

    //QMessageBox::information(this,"path1",path);

    //QDir dir(path);

listitem.h source code:

#ifndef LISTITEM_H

#define LISTITEM_H

#include <QListView>

#include <QListWidgetItem>

#include <QWidget>

#include <QMessageBox>

#include <QString>

#include <QStringList>

#include <QFileDialog>

#include <QMessageBox>

#include <QtDebug>

#include <QDir>

#include <QFileDialog>

#include <QList>

namespace Ui {

class listitem;

class listitem : public QWidget

    Q_OBJECT

public:

    explicit listitem(QWidget *parent = 0);

    ~listitem();

private:

    Ui::listitem *ui;

    QStringList *IconList=new QStringList();

    //QList<QString> IconListStr=new QList<QString>();

private slots:

    void InsertIcon();//插入ICO图片地址

    void addCitySlot();//添加列表

    void deleteCitySlot();//删除列表单项

    void deleteAllSlot();//删除列表所有项

    void showDirSlot();//显示目录

    void singleClickedSlot(QListWidgetItem *);//单击列表事件

    void doubleClickedSlot(QListWidgetItem *);//双击列表事件

};

#endif // LISTITEM_H

main.cpp Source code:

#include "listitem.h"

#include <QApplication>

int main(int argc, char *argv[])

    QApplication a(argc, argv);

    QString strPath=QApplication::applicationDirPath();

    strPath+="/fonts.png";

    a.setWindowIcon(QIcon(strPath));

    listitem w;

    w.show();

    return a.exec();