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   源码介绍

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本源码基于Qt4.8.0开发，成功实现了PCD和txt的文件转换，给点云的处理操作带来的很大的方便，同时也是Qt拖放操作和文件写入与读取操作的很好例子。

#include "transformerdialog.h"
#include <QtGui>
TransformerDialog::TransformerDialog(QWidget *parent)
    : QDialog(parent), extension(".pcd")
{
    setupUi(this);
    connect(p2tRadioButton, SIGNAL(clicked()), this, SLOT(pcd2txtClicked()));
    connect(t2pRadioButton, SIGNAL(clicked()), this, SLOT(txt2pcdClicked()));
    connect(transPushButton, SIGNAL(clicked()), this, SLOT(filesTrans()));
}

TransformerDialog::~TransformerDialog()
{

}


// 抓取释放事件
void TransformerDialog::dragEnterEvent(QDragEnterEvent *event)
{
    // 释放输入输出文件容器
    localFile.clear();
    outputFileName.clear();

    // 清空output pool
    tgtListWidget->clear();

    if (event->mimeData()->hasUrls()) {
        event->acceptProposedAction();
    } else {
        event->ignore();
    }
}

// 释放事件
void TransformerDialog::dropEvent(QDropEvent *event)
{
    QList<QUrl> urls = event->mimeData()->urls();
    QString fileName = urls.first().toLocalFile();
    if (urls.isEmpty() || fileName.isEmpty()) {
        event->ignore();
        return;
    } else {
        event->acceptProposedAction();
        foreach (QUrl url, urls) {
            // 将合法文件名导入localFile同时生成输出文件名
            if (url.toLocalFile().contains(extension)) {
                localFile.push_back(url.toLocalFile());
                QFileInfo tmp(url.path());
                srsListWidget->addItem(tmp.fileName());
                // pcd 2 txt OR txt 2 pcd
                if (extension == ".pcd") {
                    outputFileName.push_back(tmp.fileName().replace("pcd", "txt"));
                } else {
                    outputFileName.push_back(tmp.fileName().replace("txt", "pcd"));
                }
            }
        }
        fbTextBrowser->clear();
        fbTextBrowser->insertPlainText(QString::number(localFile.size()) " file(s) added!\n");
    }
}

void TransformerDialog::pcd2txtClicked()
{
    extension = ".pcd";
}

void TransformerDialog::txt2pcdClicked()
{
    extension = ".txt";
}

void TransformerDialog::filesTrans()
{
    // 使widget上的button失效以防止误操作
    transPushButton->setEnabled(false);
    p2tRadioButton->setEnabled(false);
    t2pRadioButton->setEnabled(false);

    // 转换进程
    if (extension == ".pcd") {

        // pcd 2 txt
        for (int i = 0; i != outputFileName.size();   i) {
            QFile infile(localFile.at(i));
            QFile outfile(outputFileName.at(i));
            if (infile.open(QFile::ReadOnly) && outfile.open(QFile::WriteOnly)) {
                QTextStream in(&infile);
                QTextStream out(&outfile);
                int counter = 0;
                QString line;
                while (!in.atEnd()) {
                    counter  ;
                    line = in.readLine();
                    // 11 行之后转换txt
                    if (counter > 11) {    
                        out << line << endl;
                    }
                }
            }
            infile.close();
            outfile.close();
            tgtListWidget->addItem(outputFileName.at(i));

        }

    } else {

        // txt 2 pcd
        for (int i = 0; i != outputFileName.size();   i) {
            QFile infile(localFile.at(i));
            QFile outfile(outputFileName.at(i));
            QFile infiles(localFile.at(i));
            int counter = 0;
            if (infile.open(QFile::ReadOnly) && outfile.open(QFile::WriteOnly) && infiles.open(QFile::ReadOnly)) {
                QTextStream in(&infile);
                QTextStream out(&outfile);
                QTextStream inr(&infiles);
                counter = 0;    // 初始化（很重要）
                QString line;
                while (!in.atEnd()) {
                    counter  ;
                    line = in.readLine();
                }
                out << line1 << endl;
                out << line2 << endl;
                out << line3 << endl;
                out << line4 << endl;
                out << line5 << endl;
                out << line6 << endl;
                out << line7 << counter << endl;
                out << line8 << endl;
                out << line9 << endl;
                out << line10 << counter << endl;
                out << line11 << endl;
                while (!inr.atEnd()) {
                    line = inr.readLine();
                    out << line << endl;
                }
            }
            infile.close();
            outfile.close();
            tgtListWidget->addItem(outputFileName.at(i));
        }
    }

    fbTextBrowser->clear();
    fbTextBrowser->insertPlainText(QString::number(outputFileName.size()) " file(s) transformed!\n");
    // source pool 清空
    srsListWidget->clear();

    // 使widget上的button恢复功能
    transPushButton->setEnabled(true);
    p2tRadioButton->setEnabled(true);
    t2pRadioButton->setEnabled(true);
}