【源代码】用C++、Qt实现的记事本，模拟Windows自带的

#include <QtGui> #include <QDateTime> #include <QTextCursor> #include "windowmanager.h" #include "mainwindow.h" #include "finddialog.h" #include "replacedialog.h" #include "gotodialog.h" extern windowManager *wmanager; MainWindow::MainWindow(QString fileName, windowListNode *_myNode, QWidget *parent) : QMainWindow(parent) { myNode = _myNode; setAttribute(Qt::WA_DeleteOnClose); setAcceptDrops(true); textEdit = new QTextEdit(this); setCentralWidget(textEdit); textEdit->setAcceptRichText(false); textEdit->setFocus(); textCodecName = QTextCodec::codecForLocale()->name(); createActions(); createMenus(); createStatusBar(); if (!fileName.isEmpty()){ loadFile(fileName); } else { setCurrentFile(""); } readSettings(); setFormat(true); connect(textEdit, SIGNAL(textChanged ()), this, SLOT(textModified())); findDialog = 0; replaceDialog = 0; gotoDialog = 0; printer = 0; utf8HaveBom = true; setWindowIcon(QIcon(":/nipad_icon.ico")); } MainWindow::~MainWindow() //删除没有父对象的指针，防止内存泄露 { delete CurrentTextCursor; if (printer) delete printer; wmanager->deleteClosed(myNode); } void MainWindow::createActions() { newAction = new QAction(tr("新建(&N)"), this); newAction->setShortcut(QKeySequence::New); connect(newAction, SIGNAL(triggered()), this, SLOT(newFile())); openAction = new QAction(tr("打开(&O)..."), this); openAction->setShortcut(QKeySequence::Open); connect(openAction, SIGNAL(triggered()), this, SLOT(open())); saveAction = new QAction(tr("保存(&S)"), this); saveAction->setShortcut(QKeySequence::Save); connect(saveAction, SIGNAL(triggered()), this, SLOT(save())); saveAsAction = new QAction(tr("另存为(&A)..."), this); connect(saveAsAction, SIGNAL(triggered()), this, SLOT(saveAs())); pageSetupAction = new QAction(tr("页面设置(&U)..."), this); connect(pageSetupAction, SIGNAL(triggered()), this, SLOT(pageSetup())); printAction = new QAction(tr("打印(&P)..."), this); printAction->setShortcut(QKeySequence::Print); connect(printAction, SIGNAL(triggered()), this, SLOT(print())); exitAction = new QAction(tr("退出(&X)"), this); connect(exitAction, SIGNAL(triggered()), this, SLOT(close())); undoAction = new QAction(tr("撤销(&U)"), this); undoAction->setShortcut(QKeySequence::Undo); connect(undoAction, SIGNAL(triggered()), this, SLOT(undo())); undoAction->setEnabled(false); connect(textEdit->document(), SIGNAL(undoAvailable(bool)), undoAction, SLOT(setEnabled(bool))); redoAction = new QAction(tr("重做(&R)"), this); redoAction->setShortcut(QKeySequence::Redo); connect(redoAction, SIGNAL(triggered()), this, SLOT(redo())); redoAction->setEnabled(false); connect(textEdit->document(), SIGNAL(redoAvailable(bool)), redoAction, SLOT(setEnabled(bool))); cutAction = new QAction(tr("剪切(&T)"), this); cutAction->setShortcut(QKeySequence::Cut); connect(cutAction, SIGNAL(triggered()), this, SLOT(cut())); cutAction->setEnabled(false); connect(textEdit, SIGNAL(copyAvailable(bool)), cutAction, SLOT(setEnabled(bool))); copyAction = new QAction(tr("复制(&C)"), this); copyAction->setShortcut(QKeySequence::Copy); connect(copyAction, SIGNAL(triggered()), this, SLOT(copy())); copyAction->setEnabled(false); connect(textEdit, SIGNAL(copyAvailable(bool)), copyAction, SLOT(setEnabled(bool))); pasteAction = new QAction(tr("粘贴(&P)"), this); pasteAction->setShortcut(QKeySequence::Paste); connect(pasteAction, SIGNAL(triggered()), this, SLOT(paste())); pasteAction->setEnabled(false); #ifndef QT_NO_CLIPBOARD pasteAction->setEnabled(!QApplication::clipboard()->text().isEmpty()); connect(QApplication::clipboard(), SIGNAL(dataChanged()), this, SLOT(clipboardDataChanged())); #endif deleteAction = new QAction(tr("删除(&D)"), this); deleteAction->setShortcut(QKeySequence::Delete); connect(deleteAction, SIGNAL(triggered()), this, SLOT(del())); deleteAction->setEnabled(false); connect(textEdit, SIGNAL(copyAvailable(bool)), deleteAction, SLOT(setEnabled(bool))); findAction = new QAction(tr("查找(&F)..."), this); findAction->setShortcut(QKeySequence::Find); connect(findAction, SIGNAL(triggered()), this, SLOT(find())); findAction->setEnabled(false); findNextAction = new QAction(tr("查找下一个(&N)"), this); findNextAction->setShortcut(QKeySequence::FindNext); findNextAction->setEnabled(false); connect(findNextAction, SIGNAL(triggered()), this, SLOT(findNext())); replaceAction = new QAction(tr("替换(&R)..."), this); replaceAction->setShortcut(QKeySequence::Replace); connect(replaceAction, SIGNAL(triggered()), this, SLOT(replace())); gotoAction = new QAction(tr("转到(&G)..."), this); gotoAction->setShortcut(tr("Ctrl+G")); connect(gotoAction, SIGNAL(triggered()), this, SLOT(gotoSlot())); selectAllAction = new QAction(tr("全选(&A)"), this); selectAllAction->setShortcut(QKeySequence::SelectAll); connect(selectAllAction, SIGNAL(triggered()), this, SLOT(selectAll())); timeDateAction = new QAction(tr("时间/日期(&D)"), this); timeDateAction->setShortcut(tr("F5")); connect(timeDateAction, SIGNAL(triggered()), this, SLOT(timeDate())); wordWrapAction = new QAction(tr("自动换行(&W)"), this); wordWrapAction->setCheckable(true); connect(wordWrapAction, SIGNAL(triggered(bool)), this, SLOT(setFormat(bool))); fontAction = new QAction(tr("字体(&F)..."), this); connect(fontAction, SIGNAL(triggered()), this, SLOT(setFont())); statusBarAction = new QAction(tr("状态栏(&S)"), this); statusBarAction->setCheckable(true); connect(statusBarAction, SIGNAL(triggered(bool)), this, SLOT(setFormat(bool))); aboutAction = new QAction(tr("关于(&A)"), this); connect(aboutAction, SIGNAL(triggered()), this, SLOT(aboutNipad())); aboutQtAction = new QAction(tr("关于&Qt"), this); connect(aboutQtAction, SIGNAL(triggered()), this, SLOT(aboutQt())); } void MainWindow::createMenus() { fileMenu = menuBar()->addMenu(tr("文件(&F)")); fileMenu->addAction(newAction); fileMenu->addAction(openAction); fileMenu->addAction(saveAction); fileMenu->addAction(saveAsAction); fileMenu->addSeparator(); fileMenu->addAction(pageSetupAction); fileMenu->addAction(printAction); fileMenu->addSeparator(); fileMenu->addAction(exitAction); editMenu = menuBar()->addMenu(tr("编辑(&E)")); editMenu->addAction(undoAction); editMenu->addAction(redoAction); editMenu->addSeparator(); editMenu->addAction(cutAction); editMenu->addAction(copyAction); editMenu->addAction(pasteAction); editMenu->addAction(deleteAction); editMenu->addSeparator(); editMenu->addAction(findAction); editMenu->addAction(findNextAction); editMenu->addAction(replaceAction); editMenu->addAction(gotoAction); editMenu->addSeparator(); editMenu->addAction(selectAllAction); editMenu->addAction(timeDateAction); formatMenu = menuBar()->addMenu(tr("格式(&O)")); formatMenu->addAction(wordWrapAction); formatMenu->addAction(fontAction); viewMenu = menuBar()->addMenu(tr("查看(&V)")); viewMenu->addAction(statusBarAction); menuBar()->addSeparator(); helpMenu = menuBar()->addMenu(tr("帮助(&H)")); helpMenu->addAction(aboutAction); helpMenu->addSeparator(); helpMenu->addAction(aboutQtAction); } void MainWindow::dragEnterEvent(QDragEnterEvent *event) {