QT编写图片数据转换工具

#ifndef FRMMAIN_H
#define  FRMMAIN_H

#include  QWidget>
#include QtGui>
#include QDrag>

namespace Ui {
    class frmmain;
}

class frmmain : public QWidget
{
    Q_OBJECT

public:
    explicit frmmain(QWidget *parent = 0);
    ~frmmain();

private:
    Ui::frmmain *ui;

private slots:

    void on_btnChangeToJpg_clicked();
    void on_btnChangeToTxt_clicked();
    void on_btnSelectTxt_clicked();

    void on_btnSelectFile_clicked();
    void on_btnDataToPic_clicked();
    void on_btnPicToData_clicked();
    void on_btn2_clicked();
    void on_btn1_clicked();
    void picToData(QString fromPic,QString toData,QString myformat);
    void dataToPic(QString fromData,QString toPic,QString myformat);

    QString getFileName(QString filter);//获取打开对话框中指定格式的文件
    QStringList getFileNames(QString filter);//获取打开对话框中指定格式的文件列表

    void delayTime(int s);
};

#endif // FRMMAIN_H

#include  " frmmain.h "
#include  " ui_frmmain.h "

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

frmmain:: ~ frmmain()
{
    delete ui;
}
// 图片转数据
void  frmmain::picToData(QString fromPic, QString toData, QString myformat)
{
    QImage img(fromPic);
    QByteArray ba;
    QBuffer buf( & ba);
    img.save( & buf, " JPG " ); // 按照JPG解码保存数据
    QByteArray cc = qCompress(ba, 1 );
    QByteArray hh;
     if  (myformat == " Hex " )
    {
        hh = cc.toHex(); // 16进制数据
    }
     else
    {
        hh = cc.toBase64(); // base64数据
    }
    QString str(hh);
    QFile file(toData);
     if  (file.open(QFile::WriteOnly))
    {
        file.write(str.toLatin1());
        file.close();
    }
}
// 数据转图片
void  frmmain::dataToPic(QString fromData, QString toPic, QString myformat)
{
    QFile file(fromData);
     if  (file.open(QFile::ReadOnly))
    {
        QByteArray read = file.readAll();
        file.close();
        QString ss = QString::fromLatin1(read.data(),read.size());
        QByteArray rc;
         if  (myformat == " Hex " )
        {
            rc = QByteArray::fromHex(ss.toAscii());
        }
         else
        {
            rc = QByteArray::fromBase64(ss.toAscii());
        }
        QByteArray rdc = qUncompress(rc);

        QImage img;
        img.loadFromData(rdc);
        img.save(toPic);
    }
}
QString frmmain::getFileName(QString filter)
{
    QString fileName;
    fileName = QFileDialog::getOpenFileName( this ,tr( " 选择文件 " ),QCoreApplication::applicationDirPath(),filter);
     if  ( ! fileName.isEmpty())
    {
         return  fileName;
    }
     else
    {
         return   "" ;
    }
}

QStringList frmmain::getFileNames(QString filter)
{
    QStringList fileNames;
    fileNames = QFileDialog::getOpenFileNames( this ,tr( " 选择文件 " ),QCoreApplication::applicationDirPath(),filter);
     if  ( ! fileNames.isEmpty())
    {
         return  fileNames;
    }
     else
    {
         return  fileNames;
    }
}

void  frmmain::on_btn1_clicked()
{
    ui -> pic -> setText( this -> getFileName(tr( " 图片文件(*.jpg) " )));
}

void  frmmain::on_btn2_clicked()
{
    ui -> txt -> setText( this -> getFileName(tr( " 文本文件(*.txt) " )));
}

void  frmmain::on_btnPicToData_clicked()
{
     if  (ui -> pic -> text() == "" )
    {
        QMessageBox::information( this ,tr( " 提示 " ),tr( " 请选择图片文件 " ));
         return ;
    }
     if  (ui -> txt -> text() == "" )
    {
        QMessageBox::information( this ,tr( " 提示 " ),tr( " 请选择文本文件 " ));
         return ;
    }
     if  (ui -> rbtn16 -> isChecked())
    {
         this -> picToData(ui -> pic -> text(),ui -> txt -> text(), " Hex " );
    }
     else
    {
         this -> picToData(ui -> pic -> text(),ui -> txt -> text(), " Base64 " );
    }
}

void  frmmain::on_btnDataToPic_clicked()
{
     if  (ui -> pic -> text() == "" )
    {
        QMessageBox::information( this ,tr( " 提示 " ),tr( " 请选择图片文件 " ));
         return ;
    }
     if  (ui -> txt -> text() == "" )
    {
        QMessageBox::information( this ,tr( " 提示 " ),tr( " 请选择文本文件 " ));
         return ;
    }
     if  (ui -> rbtn16 -> isChecked())
    {
         this -> dataToPic(ui -> txt -> text(),ui -> pic -> text(), " Hex " );
    }
     else
    {
         this -> dataToPic(ui -> txt -> text(),ui -> pic -> text(), " Base64 " );
    }
}

void  frmmain::on_btnSelectFile_clicked()
{
    ui -> listWidget -> addItems( this -> getFileNames(tr( " 图片文件(*.jpg) " )));
}

void  frmmain::delayTime( int  s)
{
    QTime t = QTime::currentTime().addMSecs(s);
     while (QTime::currentTime() t)
    {
        QCoreApplication::processEvents(QEventLoop::AllEvents,100);
    }
}

void frmmain::on_btnSelectTxt_clicked()
{
    ui->listWidget->addItems(this->getFileNames(tr("文本文件(*.txt)")));
}

void frmmain::on_btnChangeToTxt_clicked()
{
    QListWidgetItem *myitem;
    if (ui->listWidget->count()==0)
    {
        return;
    }

    for (int i=0;iui->listWidget->count();i++)
    {
        QString timeNow=QTime::currentTime().toString("hhmmss");
        QString dateNow=QDate::currentDate().toString("yyyyMMdd");
        QString saveFileName=QCoreApplication::applicationDirPath()+tr("/imagedata/%1%2.txt").arg(dateNow,timeNow);
        myitem=ui->listWidget->item(i);
        if (ui->rbtn16->isChecked())
        {
            this->picToData(myitem->text(),saveFileName,"Hex");
        }
        else
        {
            this->picToData(myitem->text(),saveFileName,"Base64");
        }
        this->delayTime(1000);//为了确保命名不冲突和转换完成，延时1秒
    }
    QMessageBox::information(this,tr("提示"),tr("恭喜你！转换完成！"));
}

void frmmain::on_btnChangeToJpg_clicked()
{
    QListWidgetItem *myitem;
    if (ui->listWidget->count()==0)
    {
        return;
    }

    for (int i=0;iui->listWidget->count();i++)
    {
        QString timeNow=QTime::currentTime().toString("hhmmss");
        QString dateNow=QDate::currentDate().toString("yyyyMMdd");
        QString saveFileName=QCoreApplication::applicationDirPath()+tr("/imageto/%1%2.jpg").arg(dateNow,timeNow);
        myitem=ui->listWidget->item(i);
        if (ui->rbtn16->isChecked())
        {
            this->dataToPic(myitem->text(),saveFileName,"Hex");
        }
        else
        {
            this->dataToPic(myitem->text(),saveFileName,"Base64");
        }
        this->delayTime(1000);//为了确保命名不冲突和转换完成，延时1秒
    }
    QMessageBox::information(this,tr("提示"),tr("恭喜你！转换完成！"));
}