QT 新手练习 模仿系统自带 记事本

#ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QtGui/QMainWindow> class QAction; class QTextEdit; class QLabel; class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(QWidget *parent = 0); ~MainWindow(); //rewrite event handle protected: void closeEvent(QCloseEvent *); private: //state flag int changed; //file menu QAction *newAt; QAction *openAt; QAction *saveAt; QAction *sAsAt; QAction *quitAt; QAction *undoAt; //edit menu QAction *findAt; QAction *rPeAt; //help menu QAction *abtAt; //work space QTextEdit *textEdit; //QString QString fileName; //QLabel QLabel *numOfWord; //function private slots: void open(); void newFile(); void save(); void saveAs(); void change(); void pressOk_have(); void pressOk_new(); void findNowNext(QString,bool); void findNowPre(QString,bool); void findText(); void setUndo(bool); void repNow(QString,QString,bool); void repAllNow(QString,QString,bool); void repText(); }; #endif // MAINWINDOW_H #ifndef FINDDIALOG_H #define FINDDIALOG_H #include <QDialog> class QLabel; class QLineEdit; class QCheckBox; class QPushButton; class QRadioButton; class FindDialog:public QDialog { Q_OBJECT public: enum state{NEXT,PRE}; FindDialog(QWidget *parent=0); private: QLabel *findLabel; QLineEdit *inText; QCheckBox *checkBox; QPushButton *next, *cancel; QRadioButton *up, *down; state uod; void setupWidget(); void setConns(); signals: void findNext(QString,bool b=0); void findPrevious(QString,bool b=0); private slots: void sendsgl(); void setUp(bool); }; #endif // FINDDIALOG_H #ifndef REPLDIALOG_H #define REPLDIALOG_H #include <QDialog> class QLabel; class QPushButton; class QCheckBox; class QLineEdit; class ReplDialog:public QDialog { Q_OBJECT private: QLabel *scLabel, *reLabel; QLineEdit *scEdit, *reEdit; QPushButton *repButton, *repAllButton, *cancelButton; QCheckBox *sensCheckBox; //Function void setupWidget(); void setConns(); public: ReplDialog(QWidget *parent=0); signals: void sigRep(QString,QString,bool); void sigAll(QString,QString,bool); private slots: void sendRep(); void sendAll(); }; #endif // REPLDIALOG_H #include "mainwindow.h" #include <QtGui> #include "finddialog.h" #include "repldialog.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),changed(0) { fileName=tr("无标题"); this->setWindowTitle(fileName+"-Notepad+"); //QAction memory allocate //file menu newAt=new QAction(this); openAt=new QAction(this); saveAt=new QAction(this); sAsAt=new QAction(this); quitAt=new QAction(this); //edit menu undoAt=new QAction(this); findAt=new QAction(this); rPeAt=new QAction(this); //help menu abtAt=new QAction(this); //text edit textEdit=new QTextEdit; //statustip numOfWord=new QLabel(this); numOfWord->setText(tr("您已经输入0个字符(包括换行回车等)")); //QAction title set newAt->setText(tr("新建")); newAt->setShortcut(QKeySequence::New); openAt->setText(tr("打开")); openAt->setShortcut(QKeySequence::Open); saveAt->setText(tr("保存")); saveAt->setShortcut(QKeySequence::Save); sAsAt->setText(tr("另存为")); sAsAt->setShortcut(QKeySequence::SaveAs); quitAt->setText(tr("退出")); quitAt->setShortcut(QKeySequence::Quit); findAt->setText(tr("查找")); findAt->setShortcut(QKeySequence::Find); rPeAt->setText(tr("替换")); rPeAt->setShortcut(QKeySequence::Replace); abtAt->setText(tr("关于")); abtAt->setShortcut(QKeySequence::HelpContents); undoAt->setText(tr("撤销")); //Action enable set undoAt->setEnabled(false); findAt->setEnabled(false); //text config textEdit->setFont(QFont("宋体",10)); //布局 //file QMenu *file=this->menuBar()->addMenu(tr("文件(&F)")); file->addAction(newAt); file->addAction(openAt); file->addAction(saveAt); file->addAction(sAsAt); file->addAction(quitAt); //edit QMenu *edit=this->menuBar()->addMenu(tr("编辑(&E)")); edit->addAction(undoAt); edit->addAction(findAt); edit->addAction(rPeAt); //help QMenu *help=this->menuBar()->addMenu(tr("帮助(&H)")); help->addAction(abtAt); //center this->setCentralWidget(textEdit); //statustip this->statusBar()->addPermanentWidget(numOfWord); //connections connect(openAt,SIGNAL(triggered()),this,SLOT(open())); connect(textEdit,SIGNAL(textChanged()),this,SLOT(change())); connect(saveAt,SIGNAL(triggered()),this,SLOT(save())); connect(newAt,SIGNAL(triggered()),this,SLOT(newFile())); connect(sAsAt,SIGNAL(triggered()),this,SLOT(saveAs())); connect(undoAt,SIGNAL(triggered()),textEdit,SLOT(undo())); connect(findAt,SIGNAL(triggered()),this,SLOT(findText())); connect(textEdit,SIGNAL(undoAvailable(bool)),this,SLOT(setUndo(bool))); connect(rPeAt,SIGNAL(triggered()),this,SLOT(repText())); //window size this->resize(800,600); } MainWindow::~MainWindow() { } //Event handle void MainWindow::closeEvent(QCloseEvent *e) { if(changed==1) { QMessageBox msg(this); msg.setText(tr("文件已改变")); msg.setInformativeText(tr("要将修改保存到")+fileName+"?"); msg.setIcon(QMessageBox::Question); msg.setStandardButtons(QMessageBox::Save | QMessageBox::No | QMessageBox::Cancel); msg.setDefaultButton(QMessageBox::Save); int ret = msg.exec(); switch(ret) { case QMessageBox::Save: if(fileName!=tr("无标题")) { pressOk_have();break; } else { pressOk_new();break; } case QMessageBox::No: e->accept();break; case QMessageBox::Cancel: e->ignore();break; } } else e->accept(); } //function void MainWindow::open() { fileName = QFileDialog::getOpenFileName(this, tr("打开文件"), "/home", tr("文本文档 (*.txt *.doc)")); if(!fileName.isEmpty()) { QFile file(fileName); if (file.open(QFile::ReadOnly | QFile::Text)) { QTextStream toText(&file); toText.setCodec("UNICODE"); textEdit->setPlainText(toText.readAll()); } this->setWindowTitle(fileName+"-Notepad+"); changed=0; } } void MainWindow::save() { if(fileName==tr("无标题")) { fileName = QFileDialog::getSaveFileName(this, tr("保存文件"), "untitled.txt", tr("文本文件 (*.txt)")); QString content=textEdit->toPlainText(); QFile file(fileName); if(file.open(QFile::WriteOnly|QFile::Text)) { QTextStream save(&file); save<<content; this->setWindowTitle(fileName+"-Notepad+"); changed=0; } } else { QString content=textEdit->toPlainText(); QFile file(fileName); if(file.open(QFile::WriteOnly|QFile::Text)) { QTextStream save(&file); save<<content; this->setWindowTitle(fileName+"-Notepad+"); changed=0; } } } void MainWindow::change() { if(textEdit->toPlainText().isEmpty()) { findAt->setEnabled(false); } else { findAt->setEnabled(true); } numOfWord->setText(tr("您已经输入")+QString::number(textEdit->toPlainText().length())+tr("个字符(包括换行回车等)")); this->setWindowTitle(fileName+"(*)"+"-Notepad+"); changed=1; } void MainWindow::pressOk_have() { QString content=textEdit->toPlainText(); QFile file(fileName); if(file.open(QFile::WriteOnly|QFile::Text)) { QTextStream save(&file); save<<content; this->setWindowTitle(fileName+"-Notepad+"); changed=0; } } void MainWindow::pressOk_new() { fileName = QFileDialog::getSaveFileName(this, tr("保存文件"), "untitled.txt", tr("文本文件 (*.txt)")); QString content=textEdit->toPlainText(); QFile file(fileName); if(file.open(QFile::WriteOnly|QFile::Text)) { QTextStream save(&file); save<<content; this->setWindowTitle(fileName+"-Notepad+"); changed=0; } } void MainWindow::newFile() { if(changed==1) { QMessageBox msg(this); msg.setText(tr("文件已改变")); msg.setInformativeText(tr("要将修改保存到")+fileName+"?"); msg.setIcon(QMessageBox::Question); msg.setStandardButtons(QMessageBox::Save | QMessageBox::No | QMessageBox::Cancel); msg.setDefaultButton(QMessageBox::Save); int ret = msg.exec(); switch(ret) { case QMessageBox::Save: if(fileName!=tr("无标题")) { pressOk_have(); textEdit->clear(); fileName=tr("无标题"); this->setWindowTitle(fileName+"-Notepad+"); break; } else { pressOk_new(); textEdit->clear(); fileName=tr("无标题"); this->setWindowTitle(fileName+"-Notepad+"); break; } case QMessageBox::No: textEdit->clear(); fileName=tr("无标题"); this->setWindowTitle(fileName+"-Notepad+"); break; case QMessageBox::Cancel: break; } } else { textEdit->clear(); fileName=tr("无标题"); this->setWindowTitle(fileName+"-Notepad+"); } changed=0; } void MainWindow::saveAs() { pressOk_new(); } void MainWindow::findText() { FindDialog findit(this); connect(&findit,SIGNAL(findNext(QString,bool)),this,SLOT(findNowNext(QString,bool))); connect(&findit,SIGNAL(findPrevious(QString,bool)),this,SLOT(findNowPre(QString,bool))); findit.exec(); } void MainWindow::findNowPre(QString str,bool b) { switch(b) { case false: if(textEdit->find(str,QTextDocument::FindBackward)) {} else { QMessageBox::warning(this,tr("无法找到"),tr("已到开头或结尾，找不到")+str+"!"); } break; case true: if(textEdit->find(str,QTextDocument::FindBackward|QTextDocument::FindCaseSensitively)) {} else { QMessageBox::warning(this,tr("无法找到"),tr("已到开头或结尾，找不到")+str+"!"); } break; } } void MainWindow::findNowNext(QString str,bool b) { switch(b) { case false: if(textEdit->find(str)) {} else { QMessageBox::warning(this,tr("无法找到"),tr("已到开头或结尾，找不到")+str+"!"); } break; case true: if(textEdit->find(str,QTextDocument::FindCaseSensitively)) {} else { QMessageBox::warning(this,tr("无法找到"),tr("已到开头或结尾，找不到")+str+"!"); } break; } } void MainWindow::setUndo(bool b) { if(b==true) { undoAt->setEnabled(true); } else { undoAt->setEnabled(false); } } void MainWindow::repText() { ReplDialog rep(this); connect(&rep,SIGNAL(sigRep(QString,QString,bool)),this,SLOT(repNow(QString,QString,bool))); connect(&rep,SIGNAL(sigAll(QString,QString,bool)),this,SLOT(repAllNow(QString,QString,bool))); rep.exec(); } void MainWindow::repNow(QString s1, QString s2, bool b) { QTextCursor textCur=textEdit->textCursor(); switch(b) { case false: if(textEdit->find(s1)) { textCur=textEdit->textCursor(); textCur.insertText(s2); } else { QMessageBox::warning(this,tr("提示"),tr("找不到需要替换的内容，可能光标在要查找的内容之后!"),QMessageBox::Ok); } break; case true: if(textEdit->find(s1,QTextDocument::FindCaseSensitively)) { textCur=textEdit->textCursor(); textCur.insertText(s2); } else { QMessageBox::warning(this,tr("提示"),tr("找不到需要替换的内容，可能光标在要查找的内容之后!"),QMessageBox::Ok); } break; } } void MainWindow::repAllNow(QString s1, QString s2, bool b) { qDebug()<<"Run"; QTextCursor textSt; QTextCursor textCur=textEdit->textCursor(); textCur.movePosition(QTextCursor::Start); textEdit->setTextCursor(textCur); switch(b) { case false: while(textEdit->find(s1)) { textSt=textEdit->textCursor(); textSt.insertText(s2); } break; case true: while(textEdit->find(s1,QTextDocument::FindCaseSensitively)) { textSt=textEdit->textCursor(); textSt.insertText(s2); } break; } } #include "finddialog.h" #include <QtGui> FindDialog::FindDialog(QWidget *parent):QDialog(parent) { uod=NEXT; setupWidget(); setConns(); } void FindDialog::setupWidget() { findLabel=new QLabel(tr("查找内容:"),this); inText=new QLineEdit(this); checkBox=new QCheckBox(tr("大小写敏感"),this); next=new QPushButton(tr("查找下一个"),this); cancel=new QPushButton(tr("取消"),this); up=new QRadioButton(tr("向前"),this); down=new QRadioButton(tr("向后"),this); down->setDown(true); QHBoxLayout *topLayout=new QHBoxLayout; QHBoxLayout *botLayout=new QHBoxLayout; QVBoxLayout *rightLayout=new QVBoxLayout; QVBoxLayout *leftLayout=new QVBoxLayout; QHBoxLayout *mainLayout=new QHBoxLayout; QHBoxLayout *cenLayout=new QHBoxLayout; QGroupBox *upOrDown=new QGroupBox(tr("方向"),this); cenLayout->addWidget(up); cenLayout->addWidget(down); upOrDown->setLayout(cenLayout); topLayout->addWidget(findLabel); topLayout->addWidget(inText); botLayout->addWidget(checkBox); botLayout->addWidget(upOrDown); rightLayout->addWidget(next); rightLayout->addWidget(cancel); leftLayout->addLayout(topLayout); leftLayout->addLayout(botLayout); mainLayout->addLayout(leftLayout); mainLayout->addLayout(rightLayout); this->setLayout(mainLayout); } void FindDialog::setConns() { connect(cancel,SIGNAL(clicked()),this,SLOT(close())); connect(next,SIGNAL(clicked()),this,SLOT(sendsgl())); connect(up,SIGNAL(toggled(bool)),this,SLOT(setUp(bool))); } void FindDialog::sendsgl() { if(uod==NEXT) { emit findNext(this->inText->text(),checkBox->isChecked()); qDebug()<<"send"<<checkBox->isChecked()<<uod; } else { emit findPrevious(this->inText->text(),checkBox->isChecked()); qDebug()<<"send"<<checkBox->isChecked()<<uod; } } void FindDialog::setUp(bool n) { if(n) { uod=PRE; } else { uod=NEXT; } } #include "repldialog.h" #include <QtGui> ReplDialog::ReplDialog(QWidget *parent):QDialog(parent) { setupWidget(); setConns(); } void ReplDialog::setupWidget() { scLabel=new QLabel(tr("查找内容:"),this); reLabel=new QLabel(tr("替换为 :"),this); scEdit=new QLineEdit(this); reEdit=new QLineEdit(this); repButton=new QPushButton(tr("替换"),this); repAllButton=new QPushButton(tr("替换全部"),this); cancelButton=new QPushButton(tr("取消"),this); sensCheckBox=new QCheckBox(tr("大小写敏感"),this); QHBoxLayout *topLayout=new QHBoxLayout; QHBoxLayout *midLayout=new QHBoxLayout; QVBoxLayout *leftLayout=new QVBoxLayout; QVBoxLayout *rightLayout=new QVBoxLayout; QHBoxLayout *mainLayout=new QHBoxLayout; topLayout->addWidget(scLabel); topLayout->addWidget(scEdit); midLayout->addWidget(reLabel); midLayout->addWidget(reEdit); leftLayout->addLayout(topLayout); leftLayout->addLayout(midLayout); leftLayout->addWidget(sensCheckBox); rightLayout->addWidget(repButton); rightLayout->addWidget(repAllButton); rightLayout->addWidget(cancelButton); mainLayout->addLayout(leftLayout); mainLayout->addLayout(rightLayout); this->setLayout(mainLayout); } void ReplDialog::setConns() { connect(cancelButton,SIGNAL(clicked()),this,SLOT(close())); connect(repButton,SIGNAL(clicked()),this,SLOT(sendRep())); connect(repAllButton,SIGNAL(clicked()),this,SLOT(sendAll())); } //SLOTS void ReplDialog::sendRep() { emit sigRep(scEdit->text(),reEdit->text(),sensCheckBox->isChecked()); qDebug()<<sensCheckBox->isChecked(); } void ReplDialog::sendAll() { emit sigAll(scEdit->text(),reEdit->text(),sensCheckBox->isChecked()); } 用了QTextEdit

写的很烂 凑合着看看

主要写了打开 保存 另存为 查找 替换

其它都没写