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mainwindow.cpp
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mainwindow.cpp
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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "huffman.h"
#include <QDebug>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->tblMap->setColumnWidth(0, 60);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_btnEncode_clicked()
{
ui->txtCode->setPlainText(Huffman::encode(ui->txtPlain->toPlainText()));
ui->tblMap->setRowCount(Huffman::mapping.size());
int r = 0;
QHashIterator<QChar, QString> it(Huffman::mapping);
while(it.hasNext())
{
it.next();
ui->tblMap->setItem(r, 0, new QTableWidgetItem(it.key()));
ui->tblMap->setItem(r, 1, new QTableWidgetItem(it.value()));
r++;
}
ui->statusBar->showMessage("已编码");
}
void MainWindow::on_txtCode_textChanged()
{
if(ui->txtCode->toPlainText().startsWith("# Yuki Huffman Encoded"))
ui->btnDecode->setText("<-解码");
else
ui->btnDecode->setText("<-解码...");
}
void MainWindow::on_btnDecode_clicked()
{
QStringList li = ui->txtCode->toPlainText().split('\n');
if(li[0]=="# Yuki Huffman Encoded")
{
Huffman::restoreTree(li[1]);
Huffman::mapping.clear();
Huffman::treeToMap(0, QString());
ui->tblMap->setRowCount(Huffman::mapping.size());
int r = 0;
QHashIterator<QChar, QString> it(Huffman::mapping);
while(it.hasNext())
{
it.next();
ui->tblMap->setItem(r, 0, new QTableWidgetItem(it.key()));
ui->tblMap->setItem(r, 1, new QTableWidgetItem(it.value()));
r++;
}
ui->txtPlain->setPlainText(Huffman::decode(li[2]));
ui->txtCode->setPlainText(li[2]);
ui->statusBar->showMessage("已解码");
}
else
{
on_actionOpen_triggered();
}
}
void MainWindow::on_actionSaveCode_triggered()
{
QString path = QFileDialog::getSaveFileName(this, "保存编码", ".", "二进制编码(*.huffman);;编码后的文本(*.txt)");
qDebug() << path;
if(!path.isEmpty())
{
if(path.endsWith(".huffman"))
{
QFile file(path);
if(!file.open(QIODevice::WriteOnly))
{
QMessageBox(QMessageBox::Critical, "保存文件失败", "保存二进制文件失败！", QMessageBox::Ok, this);
return;
}
file.write("Yuki Huffman Encoded", 21);
QByteArray bts = Huffman::binTreeStruct();
int btssize = bts.size();
file.write((char*)&btssize, sizeof(int));
file.write(bts);
QString code = ui->txtCode->toPlainText();
int codesize = code.size();
file.write((char*)&codesize, sizeof(int));
for(int i=0; i<codesize; i+=8)
{
char newByte(0);
for(int j=0; j<8 && i+j<codesize; j++)
{
newByte |= (code[i+j].digitValue()<<(7-j));
}
file.write(&newByte, 1);
qDebug() << (int)newByte;
}
file.close();
}
else if(path.endsWith(".txt"))
{
QFile file(path);
if(!file.open(QIODevice::WriteOnly | QIODevice::Text))
{
QMessageBox(QMessageBox::Critical, "保存文件失败", "保存编码文件失败！", QMessageBox::Ok, this);
return;
}
QTextStream ts(&file);
ts << "# Yuki Huffman Encoded" << endl << Huffman::treeStruct() << endl << ui->txtCode->toPlainText();
file.close();
}
ui->statusBar->showMessage("保存编码成功");
}
}
void MainWindow::on_actionSavePlain_triggered()
{
QString path = QFileDialog::getSaveFileName(this, "保存文本", ".", "文本文档(*.txt)");
qDebug() << path;
if(!path.isEmpty())
{
QFile file(path);
if(!file.open(QIODevice::WriteOnly | QIODevice::Text))
{
QMessageBox(QMessageBox::Critical, "保存文件失败", "保存原文文件失败！", QMessageBox::Ok, this);
return;
}
QTextStream ts(&file);
ts.setCodec("UTF-8");
ts << ui->txtPlain->toPlainText();
file.close();
ui->statusBar->showMessage("保存原文成功");
}
}
void MainWindow::on_actionExit_triggered()
{
this->close();
}
void MainWindow::on_actionOpen_triggered()
{
QString path = QFileDialog::getOpenFileName(this, "打开文本或编码", ".", "支持的格式(*.txt;*.huffman)");
qDebug() << path;
if(!path.isEmpty())
{
QFile file(path);
if(!file.open(QIODevice::ReadOnly))
{
QMessageBox(QMessageBox::Critical, "打开文件失败", "无法打开选定的文件，请检查权限。", QMessageBox::Ok, this);
return;
}
char tempbuff[21];
file.read(tempbuff, 21);
if(strcmp(tempbuff, "Yuki Huffman Encoded")==0)
{
int treesize;
file.read((char*)&treesize, sizeof(int));
char* treeStruct = new char[treesize];
file.read(treeStruct, treesize);
Huffman::restoreTree((uchar*)treeStruct, treesize);
delete[] treeStruct;
Huffman::mapping.clear();
Huffman::treeToMap(0, QString());
ui->tblMap->setRowCount(Huffman::mapping.size());
int r = 0;
QHashIterator<QChar, QString> it(Huffman::mapping);
while(it.hasNext())
{
it.next();
ui->tblMap->setItem(r, 0, new QTableWidgetItem(it.key()));
ui->tblMap->setItem(r, 1, new QTableWidgetItem(it.value()));
r++;
}
QString code;
int codesize;
file.read((char*)&codesize, sizeof(int));
QByteArray binCode = file.readAll();
for(int i=0; i*8<codesize; i++)
{
for(int j=0; j<8&&i*8+j<codesize; j++)
{
code+=(binCode[i]&(1<<(7-j))?'1':'0');
}
}
ui->txtCode->setPlainText(code);
ui->txtPlain->setPlainText(Huffman::decode(code));
ui->statusBar->showMessage("已打开编码文件并解码成功");
}
else
{
file.close();
// old
if(!file.open(QIODevice::ReadOnly | QIODevice::Text))
{
QMessageBox(QMessageBox::Critical, "打开文件失败", "无法打开选定的文件，请检查权限。", QMessageBox::Ok, this);
return;
}
QString text(file.readAll());
if(text.startsWith("# Yuki Huffman Encoded"))
{
QStringList li = text.split('\n');
Huffman::restoreTree(li[1]);
Huffman::mapping.clear();
Huffman::treeToMap(0, QString());
ui->tblMap->setRowCount(Huffman::mapping.size());
int r = 0;
QHashIterator<QChar, QString> it(Huffman::mapping);
while(it.hasNext())
{
it.next();
ui->tblMap->setItem(r, 0, new QTableWidgetItem(it.key()));
ui->tblMap->setItem(r, 1, new QTableWidgetItem(it.value()));
r++;
}
ui->txtPlain->setPlainText(Huffman::decode(li[2]));
ui->txtCode->setPlainText(li[2]);
ui->statusBar->showMessage("已打开编码文件并解码成功");
}
else
{
ui->txtPlain->setPlainText(text);
ui->txtCode->setPlainText(Huffman::encode(text));
ui->tblMap->setRowCount(Huffman::mapping.size());
int r = 0;
QHashIterator<QChar, QString> it(Huffman::mapping);
while(it.hasNext())
{
it.next();
ui->tblMap->setItem(r, 0, new QTableWidgetItem(it.key()));
ui->tblMap->setItem(r, 1, new QTableWidgetItem(it.value()));
r++;
}
ui->statusBar->showMessage("已打开文本并编码");
}
}
}
}
void MainWindow::on_actionSaveBinary_triggered()
{
QString path = QFileDialog::getSaveFileName(this, "保存二进制", ".", "二进制编码(*.huffman)");
qDebug() << path;
if(!path.isEmpty())
{
}
}