QT　listwiget 控件添加图片

时间：2023-03-09 01:35:54
QT　listwiget 控件添加图片

很多的时候我们需要制作类似手机的中的电子相框，　可以用listwidget 控件实现　　直接上代码　

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    this->move(,);

//    ui->listWidget->resize(365,400);

    //设置QListWidget的显示模式

    ui->listWidget->setViewMode(QListView::IconMode);

    //设置QListWidget中单元项的图片大小

    ui->listWidget->setIconSize(QSize(,));

    //设置QListWidget中单元项的间距

    ui->listWidget->setSpacing();

    //设置自动适应布局调整（Adjust适应，Fixed不适应），默认不适应

    ui->listWidget->setResizeMode(QListWidget::Adjust);

    //设置不能移动

    ui->listWidget->setMovement(QListWidget::Static);

    connect(ui->listWidget,SIGNAL(itemClicked(QListWidgetItem*)),this,SLOT(listWidgetClicked(QListWidgetItem*)));

    //显示图像空间的照片数量

//    QString  imageWorkPath=imagePATH;  //  /home/wanghuixi/keysiQt/workspace

    QDir * imagePath=new QDir("./123/");

    QStringList filter;

    filter << "*.jpg"<< "*.png"  ;

    QList<QFileInfo> *fileInfo=new QList<QFileInfo>(imagePath->entryInfoList(filter));

    int imageSum = fileInfo->count();//the file have "."and ".." file

    QList<QString>  fileNames;

    fileNames.clear();

    if(imageSum == )

    {

        return;

    }

    for(int i=;i<imageSum;i++)

    {

      fileNames.append(fileInfo->at(i).filePath());

    }

    for(auto tmp : fileNames)

    {

        qDebug()<<tmp<<endl;

        ui->listWidget->addItem(new QListWidgetItem(QIcon(tmp),"Tornado"));

    }

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::listWidgetClicked(QListWidgetItem *item)

{

    qDebug() << "ddsfsdf"  << "   "<<item->text() << "  " << ui->listWidget->currentIndex().row() << "   "<< ui->listWidget->count()<< endl;

    ui->listWidget->removeItemWidget(item);

    delete item;

}

运行的结果就是

QT　listwiget 控件添加图片

可以点击指定的照片会返回照片的编号　我们可以根据照片的编号　可以干很多事情　。

工程链接　

https://pan.baidu.com/s/1kYtFou2q-xu6SapUzA6TTw

还有一种可以限制　图片为指定大小的　添加到listwidget中　　思路就是把　QLabel　控件添加到listwidget 里面

        QLabel * labelP = new QLabel;

        labelP->setFixedSize(,);   //:/123/3.jpg

         labelP->setStyleSheet(tr("border-image: url(:/123/3.jpg);color: transparent;"));  //background-color: rgb(102, 194, 255);

        QListWidgetItem *aItemHome = new QListWidgetItem(ui->listWidget);

        aItemHome->setSizeHint(QSize(,));

        ui->listWidget->addItem(aItemHome);

        ui->listWidget->setItemWidget(aItemHome,labelP);

有的时候listwidget 有很多用处接下来我介绍一下 动态布局并且能滑动显示按钮

主要代码

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

#include <QListWidgetItem>

#include <QHBoxLayout>

#include <QGridLayout>

#include <QDebug>

#include <QLabel>

#include <QMoveEvent>

#include <QDir>

#include <QStandardItem>

#include <QStringList>

#include <QListWidgetItem>

#include <QPushButton>

#include <QMouseEvent>

#include "pushbutton.h"

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

    Q_OBJECT

public:

    explicit MainWindow(QWidget *parent = );

    ~MainWindow();

    QPoint pointStart;//大按钮的滑动的开始坐标

    int currentPosX;//　当前位置的　ｘ值

    QPoint pointEnd; //

    int posX ; //大图标的　Ｘ坐标

    bool eventFilter(QObject *,QEvent *);

private slots:

    void listWidgetClicked(QListWidgetItem*); //listWidgetDoubleClicked

    void listWidgetDoubleClicked(QListWidgetItem*);

private:

    Ui::MainWindow *ui;

};

#endif // MAINWINDOW_H
#include "mainwindow.h"

#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    this->move(,);

        this->setFixedSize(,); //设置窗体固定大小

    //    ui->listWidget->resize(365,400);

        //设置QListWidget的显示模式

        ui->listWidget->setViewMode(QListView::IconMode);

        //设置QListWidget中单元项的图片大小

        ui->listWidget->setIconSize(QSize(,));

        //设置QListWidget中单元项的间距

        ui->listWidget->setSpacing();

        //设置自动适应布局调整（Adjust适应，Fixed不适应），默认不适应

        ui->listWidget->setResizeMode(QListWidget::Adjust);

        //设置不能移动

        ui->listWidget->setMovement(QListWidget::Static);

        connect(ui->listWidget,SIGNAL(itemClicked(QListWidgetItem*)),this,SLOT(listWidgetClicked(QListWidgetItem*)));

        connect(ui->listWidget, SIGNAL( itemDoubleClicked ( QListWidgetItem *  ) ), this, SLOT(listWidgetDoubleClicked( QListWidgetItem * )));

        //显示图像空间的照片数量

    //    QString  imageWorkPath=imagePATH;  //  /home/wanghuixi/keysiQt/workspace

        QDir * imagePath=new QDir("./123/");

        QStringList filter;

        filter << "*.jpg"<< "*.png"  ;

        QList<QFileInfo> *fileInfo=new QList<QFileInfo>(imagePath->entryInfoList(filter));

        int imageSum = fileInfo->count();//the file have "."and ".." file

        QList<QString>  fileNames;

        fileNames.clear();

        if(imageSum == )

        {

            return;

        }

        for(int i=;i<imageSum;i++)

        {

          fileNames.append(fileInfo->at(i).filePath());

        }

        for(auto tmp : fileNames)

        {

            qDebug()<<tmp<<endl;

            ui->listWidget->addItem(new QListWidgetItem(QIcon(tmp),"Tornado"));

            QLabel * labelP = new QLabel;

            labelP->setFixedSize(,);   //:/123/3.jpg

            labelP->setStyleSheet(tr("border-image: url(:/123/3.jpg);border-radius:10px;color: transparent;"));  //background-color: rgb(102, 194, 255);

            QListWidgetItem *aItemHome = new QListWidgetItem(ui->listWidget);

            aItemHome->setSizeHint(QSize(,));

            ui->listWidget->addItem(aItemHome);

            ui->listWidget->setItemWidget(aItemHome,labelP);

        }

        ui->listWidget->installEventFilter(this);

        ui->listWidget->setMouseTracking(true);

        ui->listWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

        ui->listWidget->setVerticalScrollMode(QListWidget::ScrollPerPixel);

//          QListWidgetItem *item=new QListWidgetItem(ui->listWidget2,0);

//          item->setSizeHint(QSize(10,10));

//          QPushButton *pushButton=new QPushButton();

//          ui->listWidget2->setItemWidget(item,pushButton);

//          ui->listWidget2->show();

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

    {

        QPushButton *pushButton=new QPushButton();

        QListWidgetItem *aItemHome = new QListWidgetItem(ui->listWidget2,i);

        aItemHome->setSizeHint(QSize(,));

        pushButton->setFixedSize(,);

        ui->listWidget2->addItem(aItemHome);

        ui->listWidget2->setSpacing();

        ui->listWidget2->setItemWidget(aItemHome,pushButton);

    }

//            QListWidget *list=new QListWidget;

//            QListWidgetItem *item=new QListWidgetItem(list,0);

//            item->setSizeHint(QSize(100,100));

//            QWidget *w = new QWidget(list);

//            QHBoxLayout *layout=new QHBoxLayout(w);

//            QPushButton *pushButton=new QPushButton(w);

//            QCheckBox *checkBox=new QCheckBox(w);

//            layout->addWidget(checkBox);

//            layout->addWidget(pushButton);

//            w->setLayout(layout);

//            w->show();

//            list->setItemWidget(item,w);

//            list->show();

    QGridLayout *layout=new QGridLayout(ui->widget);

    layout->setContentsMargins(,,,);

    layout->setSpacing();

    int sum = ;

    int row = ;//hang

    int Column = ;//lie

    int num =;//jishu

    int ColumnNum[]= {,,,};

    if(sum%Column)

        {

        row = sum /Column +;

    }

    else

        {

        row = sum /Column;

    }

//    item->setSizeHint(QSize(1705,sum*30));

    ui->widget->setFixedSize(,sum*);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    layout->setColumnStretch(,);

    for(int i = ;i<=row; i++)

    {

        layout->setRowStretch(i*-,);

        for(int j=; j<Column;j++)

            {

            if(num >= sum)

                {break;}

            PushButton *pushButton=new PushButton(QString::number(num, ) );

            pushButton->installEventFilter(this);

            pushButton->setMouseTracking(true);

            pushButton->setFixedSize(,);

            layout->addWidget(pushButton,i*-,ColumnNum[j]);

            num++;

        }

        layout->setRowStretch(i*-,);

    }

    ui->widget->installEventFilter(this);

    ui->widget->setMouseTracking(true);

    ui->widgetWai->installEventFilter(this);

    ui->widgetWai->setMouseTracking(true);

    ui->widget->setLayout(layout);

    ui->widget->show();

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::listWidgetClicked(QListWidgetItem *item)

{

    qDebug() << "单击相应"  << "   "<<item->text() << "  " << ui->listWidget->currentIndex().row() << "   "<< ui->listWidget->count()<< endl;

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

//    delete item;

}

void MainWindow::listWidgetDoubleClicked(QListWidgetItem *item)

{

    qDebug() << "双击的"  << "   "<<item->text() << "  " << ui->listWidget->currentIndex().row() << "   "<< ui->listWidget->count()<< endl;

    ui->listWidget->removeItemWidget(item);

    delete item;

}

bool MainWindow::eventFilter(QObject *watched, QEvent *event)

{

  bool statues = false;

     QMouseEvent *mouseEvent = (QMouseEvent *)event;

    static int i= ;

    i++;

//        qDebug() << "对象：" <<watched->objectName()<< i <<"事件："<<event->type()<< endl;

//        if (watched==ui->informationPB ||watched==ui->knowledgePB||watched==ui->messagePB ||watched==ui->reservationPB  )

//            {

                if(event->type() == QEvent::MouseButtonPress)//:Paint

                {

                    statues = true;

                    pointStart = mouseEvent->pos();

                    currentPosX = ui->widget->y();

                    qDebug() << "＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊按下" << endl;

                }

                if(event->type() == QEvent::MouseMove)//MouseMove

                {

//                    if(statues == false)

//                       {}

//                    else

//                       {

                        pointEnd = mouseEvent->pos();

                        posX = currentPosX + (pointEnd.y() - pointStart.y());

                        ui->widget->move(,posX);

                        if(posX <ui->widgetWai->height() - ui->widget->height() )

                        {

                        ui->widget->move(,ui->widgetWai->height() - ui->widget->height());

                        }

                        if(posX >ui->widget->height() - ui->widgetWai->height())

                        {

                        ui->widget->move(,);

                        }

                        qDebug() << "／／／／／／／／／／／／／／／／／移动" << posX <<endl;

//                    }

                }

                if(event->type() == QEvent::Leave)

                {

                    qDebug() << "--------------------------离开" << endl;

                }

                if(event->type() == QEvent::Paint)

                {

                    qDebug() << "-------------------------Paint" << endl;

                }

                if(event->type() == QEvent::MouseButtonRelease)

                {

                    statues = false;

                    qDebug() << "--------------------------抬起" << ui->widgetWai->height() - ui->widget->height() << endl;

//                    if(posX < ui->widgetWai->height() - ui->widget->height())

//                    {

//                        ui->widget->move(0,ui->widgetWai->height() - ui->widget->height());

//                    }

//                    if(posX >0 )

//                    {

//                        ui->widget->move(0,0);

//                    }

                }

//            }

    return QWidget::eventFilter(watched,event);     // 最后将事件交给上层对话框

}
#ifndef PUSHBUTTON_H

#define PUSHBUTTON_H

#include <QObject>

#include <QWidget>

#include <QDebug>

#include <QPushButton>

class PushButton : public QPushButton

{

    Q_OBJECT

public:

    explicit PushButton(QString name);

signals:

private slots:

    void PushButtonClickedSlots();

public slots:

};

#endif // PUSHBUTTON_H
#include "pushbutton.h"

PushButton::PushButton(QString name)

{

    this->setText(name);

    connect(this,SIGNAL(clicked(bool)),this,SLOT(PushButtonClickedSlots()));

}

void PushButton::PushButtonClickedSlots()

{

    qDebug() << this->text() << endl;

}

工程见此链接

链接：https://pan.baidu.com/s/10pb59Ii-b_yjMuDx-Okrdw 密码：gtte

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