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Qt 定制QFileDialog 实现文件新建 删除 修改 保存等功能 


     
     
#ifndef SPMFILELOADDIALOG_H
#define SPMFILELOADDIALOG_H
#include <QFileDialog>
#include <QCheckBox>
#include <QTextEdit>
#include <QPushButton>
#include <qfiledialog.h>
#include <QFile>
class spmFileLoadDialog : public QFileDialog
{
    Q_OBJECT
public:
    explicit spmFileLoadDialog(QObject *parent = 0);
    ~spmFileLoadDialog();
protected:
    virtual void customEvent(QEvent *e);
    virtual void done(int result);
    virtual void accept();
    virtual void changeEvent(QEvent *e);
    virtual bool eventFilter(QObject *obj, QEvent *event);
    virtual void resizeEvent(QResizeEvent *event);
    virtual void showEvent(QShowEvent *);
signals:
public slots:
    void newCall();
    void saveCall();
    void saveAsCall();
    void loadCall();
    void deleteCall();
    void fileSelectedChanged(const QString &file);
    void setBrowseDirectory(const QString &directory)
    {
        curdirectory = directory;
        this->setDirectory(directory);
    };
    void setSaveLoadMode(int mode = 0)
    {
        if(mode == 1)
        {
            setLabelText(QFileDialog::Accept, "Save");
        }
    };
    int showRenameDialog();
    void hideRenameDialog();
    void renameFile(QString fpath, QString fname);
    void copyFile(QString fpath, QString fname);
private:
    QString caption;
    QString curdirectory;
    QString filter;
    QCheckBox *checkBox;
    QTextEdit *pTextEditor;
    QPushButton  *pLoadBtn, *pSaveBtn,
                 *pSaveAsBtn, *pNewBtn, *pDelBtn;
    QString currFile;
    QString currLoadedFile;
    bool m_bModified;
};
#endif // SPMFILELOADDIALOG_H

 


 
#include "spmFileLoadDialog.h"
 
#include <stdio.h>
 
#include <stdlib.h>
 
#include <superlog.h>
 
#include <QMessageBox>
 
#include <HResourceRO.h>
 
#include <QPalette>
 
#include <QLabel>
 
#include <QKeyEvent>
 
#include <QCoreApplication>
 
#include <QFile>
 
#include <QVBoxLayout>
 
static QDialog *pRenameDialog;
 
//static QTextEdit *pNameText;
 
static QLabel *pNameLabel;
 
spmFileLoadDialog::spmFileLoadDialog(QObject *parent)
 
    :QFileDialog((QWidget *)parent, tr("Open File"), tr("/home/lcdrm/recipe"),  tr("Image Files (*.rcp)") )
 
{
 
    /* //this->setGeometry(this->geometry().x(), this->geometry().y(), 800, this->geometry().height());
 
    checkBox = new QCheckBox(this);
 
    checkBox->setText("Include Original Document");
 
    checkBox->setCheckState(Qt::Checked);
 
     //QFileDialogPrivate *pprivate; = reinterpret_cast<d_ptr>;
 
     //pprivate->qFileDialogUi->gridLayout->addWidget(checkBox,4,1);
 
     //setAcceptMode(QFileDialog::AcceptOpen);
 
     //setFileMode(QFileDialog::ExistingFile);
 
    //checkBox->setGeometry();
 
     checkBox->show();
 
*/
 
    pRenameDialog  = new QDialog(this);
 
    pRenameDialog->setModal(TRUE);
 
    pNameLabel = new QLabel(pRenameDialog);
 
    pNameLabel->setGeometry(10, 10, 130, 20);
 
    pNameLabel->setText("FileName:");
 
 
    pNameText = new QTextEdit(pRenameDialog);
 
    pNameText->setGeometry(30, 10, 150, 20);
 
    pNameText->installEventFilter(this);
 
 
    pTextEditor = new QTextEdit(this);
 
    pTextEditor->setGeometry( QRect(0,0, 400,  this->geometry().height() - 110) );
 
    pTextEditor->move(500,44);
 
    pTextEditor->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 
    pTextEditor->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 
    pTextEditor->setStyleSheet("background-color:rgb(4,4,4)");
 
    QPalette p = palette();
 
    p.setColor(QPalette::Text, QColor(177, 177, 177));
 
    pTextEditor->setPalette(p); // ????, ???widget????, ???ui->lineEdit?????.
 
    pTextEditor->show();
 
 
    pLoadBtn = new QPushButton(this);
 
    pLoadBtn->setText("Load");
 
    pLoadBtn->setGeometry( 410, 85, 80, 40 );
 
    pSaveBtn  = new QPushButton(this);
 
    pSaveBtn->setText("Save");
 
    pSaveBtn->setGeometry( 410, 125, 80, 40 );
 
    pSaveAsBtn  = new QPushButton(this);
 
    pSaveAsBtn->setText("SaveAs");
 
    pSaveAsBtn->setGeometry( 410, 165, 80, 40 );
 
    pNewBtn = new QPushButton(this);
 
    pNewBtn->setText("CreateNew");
 
    pNewBtn->setGeometry( 410, 205, 80, 40 );
 
    pDelBtn = new QPushButton(this);
 
    pDelBtn->setText("Delete");
 
    pDelBtn->setGeometry( 410, 245, 80, 40 );
 
    pLoadBtn->show();
 
    pSaveBtn->show();
 
    pNewBtn->show();
 
    pDelBtn->show();
 
    connect( pLoadBtn, SIGNAL( clicked() ), this, SLOT( loadCall() ) );
 
    connect( pSaveBtn, SIGNAL( clicked() ), this, SLOT( saveCall() ) );
 
    connect( pNewBtn, SIGNAL( clicked() ), this, SLOT( newCall() ) );
 
    connect( pDelBtn, SIGNAL( clicked() ), this, SLOT( deleteCall() ) );
 
    connect( pSaveAsBtn, SIGNAL( clicked() ), this, SLOT( saveAsCall() ) );
 
 
    findDlg = new QDialog(this);
 
    findDlg->setWindowTitle(tr("ęŸ„ę‰¾"));
 
    findLineEdit = new QLineEdit(findDlg);
 
    QPushButton *btn= new QPushButton(tr("ęŸ„ę‰¾äø‹äø€äøŖ"), findDlg);
 
    QVBoxLayout *layout= new QVBoxLayout(findDlg);
 
    layout->addWidget(findLineEdit);
 
    layout->addWidget(btn);
 
    connect(btn, SIGNAL(clicked()), this, SLOT(showFindText()));
 
    findDlg->hide();
 
 
    //connect( this, SIGNAL( fileSelected(const QString &file) ), this, SLOT( fileSelectedChanged(const QString &file) ) );
 
    QCoreApplication::postEvent( this, new QEvent( QEvent::Type( QEvent::User ) ) );
 
    this->installEventFilter(this);
 
    currFile = "";
 
    m_bModified = FALSE;
 
}
 
 
void spmFileLoadDialog::newCall()
 
{
 
    QString fpath;
 
    int iCnt = 0;
 
    pRenameDialog->show();
 
    fpath += this->curdirectory;
 
    fpath += "//NewFile";
 
    fpath += '0' + iCnt;
 
    fpath += ".txt";
 
    plog(GU(2),"spmFileLoadDialog newCall pathname:%s\n",fpath.toStdString().c_str() );
 
    QFile *qfn = new QFile();
 
    while(qfn->exists(fpath))
 
    {
 
        ++ iCnt;
 
        fpath.clear();
 
        fpath += this->curdirectory;
 
        fpath += "//NewFile";
 
        fpath += '0' + iCnt;
 
        fpath += ".txt";
 
    }
 
    qfn->setFileName(fpath);
 
    qfn->open(QIODevice::ReadWrite);
 
    qfn->close();
 
    this->update();
 
    this->updateGeometry();
 
    selectedFiles().clear();
 
    this->selectFile(fpath);
 
   // pRenameDialog->hide();
 
}
 
 
void spmFileLoadDialog::showFindText()
 
{
 
 
}
 
 
void spmFileLoadDialog::saveCall()
 
{
 
    if(currLoadedFile == "")
 
    {
 
        QMessageBox::information(this,"Warning",  "File Di Not Loaded?",
 
                                 QMessageBox::Ok );
 
    }
 
    else
 
    if(QMessageBox::Yes==QMessageBox::information(this,"Warning",
 
                                                  "Are you sure to Save?",
 
                                                  QMessageBox::Yes,QMessageBox::No))
 
    {
 
        QFile *saveFile  = new QFile(currFile);
 
        saveFile->open(QIODevice::ReadWrite);
 
        saveFile->seek(-1);
 
        saveFile->write( QByteArray(pTextEditor->document()->toPlainText().toStdString().c_str() ));
 
        saveFile->close();
 
        pTextEditor->document()->setModified(false);
 
        this->update();
 
        this->updateGeometry();
 
    }
 
    else
 
    {
 
 
    }
 
}
 
 
void spmFileLoadDialog::copyFile(QString fpath, QString fname)
 
{
 
    QString path = fpath, cmd;
 
    int curr = 0;
 
   // while(1)
 
    {
 
        curr = path.lastIndexOf("/");
 
        if(curr)
 
        {
 
        }
 
        else
 
        {
 
             ++ curr       ;
 
        }
 
 
    }
 
    path.clear();
 
    path = fpath.left(curr);
 
    path += "/";
 
    path += fname;
 
    cmd.sprintf("/bin/cp -rp %s %s", fpath.toStdString().c_str(), path.toStdString().c_str());
 
    plog(GU(1),"spmFileLoadDialog execute copyFilename=%s cmd:%s\n", fname.toStdString().c_str(),cmd.toStdString().c_str() );
 
    system(cmd.toStdString().c_str());
 
    this->selectFile(path);
 
}
 
 
void spmFileLoadDialog::renameFile(QString fpath, QString fname)
 
{
 
   QString path = fpath, cmd;
 
   int curr = 0;
 
  // while(1)
 
   {
 
       curr = path.lastIndexOf("/");
 
       if(curr)
 
       {
 
       }
 
       else
 
       {
 
            ++ curr       ;
 
       }
 
 
   }
 
   path.clear();
 
   path = fpath.left(curr);
 
   path += "/";
 
   path += fname;
 
   cmd.sprintf("/bin/mv %s %s", fpath.toStdString().c_str(), path.toStdString().c_str());
 
   plog(GU(1),"spmFileLoadDialog execute renameFilename=%s cmd:%s\n", fname.toStdString().c_str(),cmd.toStdString().c_str() );
 
   system(cmd.toStdString().c_str());
 
   this->selectFile(path);
 
}
 
 
void spmFileLoadDialog::hideRenameDialog()
 
{
 
    pNameText->document()->setModified(TRUE);
 
    //rename the current selected file  this->selectFile(fpath);
 
    pNameText->update();
 
    qDebug("### hideRenameDialog par0:%s par1:%s### currTxt:%s",
 
           ((QString)(selectedFiles()[0])).toStdString().c_str(),
 
           pNameText->document()->toPlainText() );
 
     //rename the current selected file  this->selectFile(fpath);
 
     copyFile(this->selectedFiles()[0], pNameText->document()->toPlainText());
 
     //renameFile(this->selectedFiles()[0], pNameText->document()->toPlainText());
 
     pRenameDialog->hide();
 
     this->update();
 
}
 
 
int spmFileLoadDialog::showRenameDialog()
 
{
 
    QPoint pos;
 
    //pos = this->mapToParent(pos);
 
    pos = this->mapToGlobal(pos);
 
    pRenameDialog->setWindowTitle("FileName:");
 
    pRenameDialog->setGeometry(pos.x()+geometry().width()/2, pos.y()+geometry().height()/3,
 
                               geometry().width()/2, geometry().height()/3);
 
    pRenameDialog->move( pos.x()+geometry().width()/2,
 
                         pos.y()+geometry().height()/3 );
 
    pRenameDialog->show();
 
    return 0;
 
}
 
 
void spmFileLoadDialog::saveAsCall()
 
{
 
    showRenameDialog();
 
    m_bModified = 3;
 
    if(QMessageBox::Yes==QMessageBox::information(this,"Warning",
 
                                                  "Are you sure to Save?",
 
                                                  QMessageBox::Yes,QMessageBox::No))
 
    {
 
 
        pTextEditor->document()->setModified(false);
 
    }
 
    else
 
    {
 
 
    }
 
}
 
 
 
 
void spmFileLoadDialog::loadCall()
 
{
 
    QString fileBuf;
 
    QFile curloader;
 
 
    if(pTextEditor->document()->isModified())
 
    {
 
        if(QMessageBox::No==QMessageBox::information(this,"Warning",
 
                                                      "Current File is modified ,\nAre you sure to load another file?",
 
                                                      QMessageBox::Yes,QMessageBox::No))
 
        {
 
            return;
 
        }
 
 
    }
 
 
    fileBuf.clear();
 
    curloader.setFileName(currFile);
 
    curloader.open(QIODevice::ReadWrite);
 
    fileBuf.append(curloader.readAll());
 
    //plog(GU(1),"spmFileLoadDialog loadCall buffer:%s\n",fileBuf.toStdString().c_str() );
 
    pTextEditor->clear();
 
    pTextEditor->setText(fileBuf);
 
    pTextEditor->update();
 
    currLoadedFile = currFile;
 
}
 
 
void spmFileLoadDialog::deleteCall()
 
{
 
    if(QMessageBox::Yes==QMessageBox::information(this,"Warning",
 
                                                  "Are you sure to Delete?",
 
                                                  QMessageBox::Yes,QMessageBox::No))
 
    {
 
        QString currFile = this->selectedFiles()[0];
 
        QString cmdstr;
 
        cmdstr.sprintf("/bin/rm -rf %s", currFile.toStdString().c_str());
 
        plog(GU(2),"spmFileLoadDialog deleteCall cmdstr:%s\n",cmdstr.toStdString().c_str() );
 
        system(cmdstr.toStdString().c_str());
 
        this->update();
 
        this->updateGeometry();
 
    }
 
    else
 
    {
 
 
    }
 
 
}
 
 
void spmFileLoadDialog::fileSelectedChanged(const QString &file)
 
{
 
    QString currFile =  this->selectedFiles()[0];
 
    plog(GU(1),"fileSelectedChanged Current Selected file:%s\n", currFile.toStdString().c_str());
 
}
 
 
void spmFileLoadDialog::customEvent(QEvent *e)
 
{
 
    this->setGeometry(this->geometry().x(), this->geometry().y(), 900, this->geometry().height());
 
    this->setViewMode(QFileDialog::Detail);
 
    this->setFileMode(QFileDialog::AnyFile);
 
}
 
 
spmFileLoadDialog::~spmFileLoadDialog()
 
{
 
 
}
 
 
 
void spmFileLoadDialog::done(int result)
 
{
 
 
    QFileDialog::done(result);
 
}
 
 
void spmFileLoadDialog::accept()
 
{
 
 
    QFileDialog::accept();
 
}
 
 
void spmFileLoadDialog::changeEvent(QEvent *event)
 
{//Read the content from the path
 
    currFile =  this->selectedFiles()[0];
 
    //plog(GU(1),"Current Selected file:%s\n", currFile.toStdString().c_str());
 
    QFileDialog::changeEvent(event);
 
}
 
 
void spmFileLoadDialog::showEvent(QShowEvent *event)
 
{
 
    return QFileDialog::showEvent(event);
 
}
 
 
void spmFileLoadDialog::resizeEvent(QResizeEvent *event)
 
{
 
    //QRect rect =  this->geometry();
 
    int xEdStartPos = this->geometry().width()/2;
 
    int xBtStartPos = this->geometry().width()/2 - 90;
 
    pLoadBtn->setGeometry( xBtStartPos, 85, 80, 40 );
 
 
    pSaveBtn->setGeometry( xBtStartPos, 125, 80, 40 );
 
 
    pSaveAsBtn->setGeometry( xBtStartPos, 165, 80, 40 );
 
 
    pNewBtn->setGeometry( xBtStartPos, 205, 80, 40 );
 
 
    pDelBtn->setGeometry( xBtStartPos, 245, 80, 40 );
 
 
    pTextEditor->setGeometry( QRect( xEdStartPos, 44, this->geometry().width()/2-45,  this->geometry().height() - 115) );
 
 
    return QFileDialog::resizeEvent(event);
 
}
 
 
bool spmFileLoadDialog::eventFilter(QObject *obj, QEvent *event)
 
{
 
 
    if(obj == this->pTextEditor)
 
    {
 
        if(event->type() == QEvent::KeyPress)
 
        {
 
 
        }
 
    }
 
    if( obj == pNameText )
 
    {
 
        //plog(GU(2),"EventFilter pNameText event!\n");
 
        if(event->type() == QEvent::KeyPress)
 
        {
 
            int key = static_cast<QKeyEvent*>(event)->key();
 
            switch(key)
 
            {
 
            case Qt::Key_Enter:
 
            case Qt::Key_Return:
 
                hideRenameDialog();
 
                break;
 
            default:
 
                break;
 
            }
 
        }
 
    }
 
    changeEvent(event);
 
 
    QFileDialog::eventFilter(obj, event);
 
}
 
 

                
      


    


    

      




    

      
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道可道，非常道；名可名，非常名。
无名，天地之始，有名，万物之母。
故常无欲，以观其妙，常有欲，以观其徼。
此两者，同出而异名，同谓之玄，玄之又玄，众妙之门。

    


    
    
    
    
    
    
    
    

    
    




  
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