C++实现基于Qt的文本编辑器

#include "mainwindow.h" #include "ui_mainwindow.h" #include "global.h" #include <QDebug> #include <QMessageBox> #include <QFileDialog> #include <string> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); this->setWindowFlags(Qt::FramelessWindowHint); this->setAttribute(Qt::WA_TranslucentBackground); ui->lineEdit->setPlaceholderText("please enter string"); ui->lineEdit_2->setPlaceholderText("please enter location"); ui->lineEdit_3->setPlaceholderText("find and delete"); ui->lineEdit_4->setPlaceholderText("after location replace with"); QAction *lineEditAction = new QAction; lineEditAction->setIcon(QIcon(":/icon/x.ico")); ui->label->setText(""); //ui->label_2->setText("show search location"); ui->lineEdit->addAction(lineEditAction,QLineEdit::TrailingPosition); connect(lineEditAction,SIGNAL(triggered(bool)),this,SLOT(Clear())); connect(ui->lineEdit,SIGNAL(returnPressed()),this,SLOT(inSert())); connect(ui->lineEdit_3,SIGNAL(returnPressed()),this,SLOT(Search())); connect(ui->lineEdit_4,SIGNAL(returnPressed()),this,SLOT(Replace())); //Clear(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::Clear() { ui->lineEdit->clear(); } void MainWindow::Search() { QString res; //ui->label_2->setText(""); int searchlength = 0; MyString temp = textEditor.strcurrent; QByteArray ba = ui->lineEdit_3->text().toLatin1(); char* buffer = ba.data(); //qDebug()<<temp.indexof(buffer); while(temp.indexof(buffer)){ int start = temp.indexof(buffer); searchlength = searchlength + start; //ui->label_2->setText(ui->label_2->text()+'\t'+QString::number(searchlength)); res = res + '\t' + QString::number(searchlength); temp = temp.substring(start, strlen(temp.data()) - start); } QMessageBox::about(this, "About",res); } void MainWindow::Replace() { int deleteflag; textEditor.previous = push(textEditor.previous, textEditor.strcurrent.data()); MyString s = textEditor.strcurrent.data();//被替换后的返回的内容 MyString d = textEditor.strcurrent.data();//被替换的内容 QByteArray ba = ui->lineEdit_3->text().toLatin1(); char* buffer = ba.data(); ba = ui->lineEdit_4->text().toLatin1(); char* p = new char[strlen(ba.data())+1]; for(int i = 0;i < strlen(ba.data());++i){ p[i] = ba.data()[i]; } p[strlen(ba.data())] = '\0'; int index = ui->lineEdit_2->text().toInt(); textEditor.strcurrent.replace(d, s, buffer, p, false, index-1); textEditor.strcurrent.setchar(d.data()); Clear(); Review(); textEditor.now = push(textEditor.now, textEditor.strcurrent.data()); delete(p); } //输入插入位置->保存原先的字符串->插入->显示->保存插入后的字符串 void MainWindow::inSert() { QByteArray ba = ui->lineEdit->text().toLatin1(); char* buffer = ba.data(); int index = ui->lineEdit_2->text().toInt(); textEditor.previous = push(textEditor.previous,textEditor.strcurrent.data()); textEditor.strcurrent.insert(buffer,index - 1); Clear(); Review(); textEditor.now = push(textEditor.now,textEditor.strcurrent.data()); //qDebug()<<QString(QLatin1String(textEditor.strcurrent.data())); delete(buffer); } void MainWindow::Review() { ui->label->setText(QString(QLatin1String(textEditor.strcurrent.data()))); } void MainWindow::on_pushButton_clicked() { int deleteflag; textEditor.previous = push(textEditor.previous, textEditor.strcurrent.data()); MyString s = textEditor.strcurrent.data();//被替换后的返回的内容 MyString d = textEditor.strcurrent.data();//被替换的内容 QByteArray ba = ui->lineEdit_3->text().toLatin1(); char* buffer = ba.data(); int replaceflag = 0; textEditor.strcurrent.replace(d, s, buffer, (char*)"", replaceflag); textEditor.strcurrent.setchar(d.data()); Clear(); Review(); textEditor.now = push(textEditor.now, textEditor.strcurrent.data()); } void MainWindow::on_pushButton_2_clicked() { int deleteflag; textEditor.previous = push(textEditor.previous, textEditor.strcurrent.data()); MyString s = textEditor.strcurrent.data();//被替换后的返回的内容 MyString d = textEditor.strcurrent.data();//被替换的内容 QByteArray ba = ui->lineEdit_3->text().toLatin1(); char* buffer = ba.data(); int replaceflag = 1; textEditor.strcurrent.replace(d, s, buffer, (char*)"", replaceflag); textEditor.strcurrent.setchar(d.data()); Clear(); Review(); textEditor.now = push(textEditor.now, textEditor.strcurrent.data()); } void MainWindow::on_pushButton_3_clicked() { int deleteflag; textEditor.previous = push(textEditor.previous, textEditor.strcurrent.data()); MyString s = textEditor.strcurrent.data();//被替换后的返回的内容 MyString d = textEditor.strcurrent.data();//被替换的内容 QByteArray ba = ui->lineEdit_3->text().toLatin1(); char* buffer = ba.data(); ba = ui->lineEdit_4->text().toLatin1(); char* p = new char[strlen(ba.data())+1]; for(int i = 0;i < strlen(ba.data());++i){ p[i] = ba.data()[i]; } p[strlen(ba.data())] = '\0'; int index = ui->lineEdit_2->text().toInt(); textEditor.strcurrent.replace(d, s, buffer, p, true,index - 1); textEditor.strcurrent.setchar(d.data()); Clear(); Review(); textEditor.now = push(textEditor.now, textEditor.strcurrent.data()); delete(p); } void MainWindow::on_pushButton_4_clicked() { if(path == ""){ path = QFileDialog::getSaveFileName(this, "保存", "..", "TXT(*.txt)"); } QFile file(path); file.open(QIODevice::WriteOnly | QIODevice::Text); file.write(textEditor.strcurrent.data()); file.close(); } void MainWindow::on_pushButton_5_clicked() { path = QFileDialog::getOpenFileName(this, "打开文件", "..", "TXT(*.txt)"); QFile file(path); if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) { return; } textEditor.strcurrent.setchar(file.readAll().data()); Clear(); Review(); //QByteArray allArray = file.readAll(); //QTextCodec *codec = QTextCodec::codecForName("gb18030"); //QString allStr = codec->toUnicode(allArray); //QString allStr = QString(allArray); file.close(); } void MainWindow::on_pushButton_6_clicked() { if (textEditor.previous != NULL) { textEditor.now = push(textEditor.now, textEditor.strcurrent.data()); textEditor.strcurrent = textEditor.previous->data; Clear(); Review(); textEditor.previous = pop(textEditor.previous); } else { QMessageBox::about(this, "about","no back"); } } void MainWindow::on_pushButton_7_clicked() { if (textEditor.now != NULL) { textEditor.previous = push(textEditor.previous, textEditor.strcurrent.data()); textEditor.strcurrent = textEditor.now->data; Clear(); Review(); textEditor.now = pop(textEditor.now); } else { QMessageBox::about(this, "about","no next"); } } void MainWindow::on_pushButton_8_clicked() { QString res; res = res + "number of capital letters:" + QString::number(textEditor.strcurrent.CharCount().bchar) + "\n"; res = res + "number of lowercase letters:"+ QString::number(textEditor.strcurrent.CharCount().schar) + "\n"; res = res + "number of space:" + QString::number(textEditor.strcurrent.CharCount().space) + "\n"; res = res + "number of Total characters:" + QString::number(textEditor.strcurrent.CharCount().length) + "\n"; qDebug()<<textEditor.strcurrent.CharCount().len