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terminal.cpp
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terminal.cpp
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#include "terminal.h"
#include "ui_terminal.h"
#include <QMessageBox>
#include <QTimer>
#include <QProcess>
#include <QKeyEvent>
#include <QTextBlock>
#define CMDTXT "user@Terminal# "
#define T_PrivPtr( o ) (( StationaryLampSet *) o )
Terminal::Terminal(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::Terminal)
{
ui->setupUi(this);
//注册监视对象
ui->textEdit->installEventFilter(this);
//初始化QProcess
cmd=new QProcess(this);
connect(cmd , SIGNAL(readyReadStandardOutput()) , this , SLOT(on_readoutput()));
connect(cmd , SIGNAL(readyReadStandardError()) , this , SLOT(on_readerror()));
//注册启动事件
QTimer::singleShot(0, this, SLOT(init()));
}
Terminal::~Terminal()
{
//销毁外部程序
if(cmd)
{
cmd->close();
cmd->waitForFinished();
}
delete ui;
}
void Terminal::init()
{
cmd->start("bash"); //启动终端(Windows下改为cmd)
cmd->waitForStarted(); //等待启动完成
ui->textEdit->append(CMDTXT);
}
void Terminal::write(){
QString word=Terminal::textCursor();
QRegExp rxlen("user@Terminal#(.+)$");
if(rxlen.indexIn(word)!=-1 && Terminal::textEnd(15)!=CMDTXT)
{
QString ch = rxlen.cap(1).trimmed()+"\n";
char* shell; QByteArray ba = ch.toLatin1(); shell=ba.data();
cmd->write(shell);
//Terminal::checkshell();
}else{
QTextCursor cursor = ui->textEdit->textCursor();
cursor.movePosition(QTextCursor::End);
ui->textEdit->setTextCursor(cursor);
}
}
void Terminal::checkshell(){
QString word= ui->textEdit->toPlainText().trimmed();
QString w=word.mid(word.length()-1,word.length());
if(w!="#"){
ui->textEdit->append(CMDTXT);
}
}
//监视对象
bool Terminal::eventFilter(QObject *target, QEvent *event)
{
/*处理按键消息 */
if(event->type() == QEvent::KeyPress)
{
if (target == ui->textEdit){
/*强制类型转换 */
QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
//处理回车消息
if (keyEvent->key() == Qt::Key_Enter || keyEvent->key() == 16777220){
Terminal::write();
return true;
//处理删除消息
}else if(keyEvent->key() == Qt::Key_Backspace ){
QString word=Terminal::textCursor();
//不允许删除前面的内容
if(Terminal::textEnd(15)==CMDTXT){return true;}
if(word.contains(CMDTXT)){
return (Terminal::textCursor()==CMDTXT);
}else{
return true;
}
//不允许修改前面的内容
}else if(Terminal::textEnd(15)==CMDTXT && Terminal::textCursor()!=CMDTXT){
return true;
}
}
}
return QWidget::eventFilter(target, event);
}
//取光标所在行内容
QString Terminal::textCursor()
{
QTextCursor tc;
tc = ui->textEdit->textCursor();
return tc.block().text();
}
//从后截取文本
QString Terminal::textEnd(int num)
{
QString word=ui->textEdit->toPlainText();
word=word.mid(word.size()-num,word.size());
return word;
}
void Terminal::on_readoutput()
{
ui->textEdit->append(cmd->readAllStandardOutput().data()); //将输出信息读取到编辑框
Terminal::checkshell();
}
void Terminal::on_readerror()
{
ui->textEdit->append(cmd->readAllStandardError().data());
Terminal::checkshell();
}