基于QT的文本编辑器程序源代码.doc

太原工业学院毕业设计附录 文本编辑器代码 TEMPLATE = appTARGET = texteditCONFIG += qt warn_onHEADERS = textedit.hSOURCES = textedit.cpp main.cppRESOURCES += textedit.qrcbuild_all:!build_pass CONFIG -= build_all CONFIG += release# installtarget.path = $QT_INSTALL_DEMOS/texteditsources.files = $SOURCES $HEADERS $RESOURCES *.pro *.html *.doc imagessources.path = $QT_INSTALL_DEMOS/texteditINSTALLS += target sources textedit.h#ifndef TEXTEDIT_H#define TEXTEDIT_H#include #include #include QT_FORWARD_DECLARE_CLASS(QAction)QT_FORWARD_DECLARE_CLASS(QComboBox)QT_FORWARD_DECLARE_CLASS(QFontComboBox)QT_FORWARD_DECLARE_CLASS(QTextEdit)QT_FORWARD_DECLARE_CLASS(QTextCharFormat)QT_FORWARD_DECLARE_CLASS(QMenu)class TextEdit : public QMainWindow Q_OBJECTpublic: TextEdit(QWidget *parent = 0);protected: virtual void closeEvent(QCloseEvent *e);private: void setupFileActions(); void setupEditActions(); void setupTextActions(); bool load(const QString &f); bool maybeSave(); void setCurrentFileName(const QString &fileName);private slots: void fileNew(); void fileOpen(); bool fileSave(); bool fileSaveAs(); void filePrint(); void filePrintPreview(); void filePrintPdf(); void textBold(); void textUnderline(); void textItalic(); void textFamily(const QString &f); void textSize(const QString &p); void textStyle(int styleIndex); void textColor(); void textAlign(QAction *a); void currentCharFormatChanged(const QTextCharFormat &format); void cursorPositionChanged(); void clipboardDataChanged(); void about(); void printPreview(QPrinter *);private: void mergeFormatOnWordOrSelection(const QTextCharFormat &format); void fontChanged(const QFont &f); void colorChanged(const QColor &c); void alignmentChanged(Qt:Alignment a); QAction *actionSave, *actionTextBold, *actionTextUnderline, *actionTextItalic, *actionTextColor, *actionAlignLeft, *actionAlignCenter, *actionAlignRight, *actionAlignJustify, *actionUndo, *actionRedo, *actionCut, *actionCopy, *actionPaste; QComboBox *comboStyle; QFontComboBox *comboFont; QComboBox *comboSize; QToolBar *tb; QString fileName; QTextEdit *textEdit;#endif main.cpp#include textedit.h#include int main( int argc, char * argv ) Q_INIT_RESOURCE(textedit); QApplication a( argc, argv ); TextEdit mw; mw.resize( 700, 800 ); mw.show(); return a.exec(); textedit.cpp#include textedit.h#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef Q_WS_MACconst QString rsrcPath = :/images/mac;#elseconst QString rsrcPath = :/images/win;#endifTextEdit:TextEdit(QWidget *parent) : QMainWindow(parent) this-setWindowTitle(QString(文本编辑器); QTextCodec:setCodecForCStrings(QTextCodec:codecForName(UTF-8); setupFileActions(); setupEditActions(); setupTextActions(); QMenu *helpMenu = new QMenu(帮助, this); menuBar()-addMenu(helpMenu); helpMenu-addAction(关于, this, SLOT(about(); helpMenu-addAction(关于 &Qt, qApp, SLOT(aboutQt(); textEdit = new QTextEdit(this); connect(textEdit, SIGNAL(currentCharFormatChanged(const QTextCharFormat &), this, SLOT(currentCharFormatChanged(const QTextCharFormat &); connect(textEdit, SIGNAL(cursorPositionChanged(), this, SLOT(cursorPositionChanged(); setCentralWidget(textEdit); textEdit-setFocus(); setCurrentFileName(QString(); fontChanged(textEdit-font(); colorChanged(textEdit-textColor(); alignmentChanged(textEdit-alignment(); connect(textEdit-document(), SIGNAL(modificationChanged(bool), actionSave, SLOT(setEnabled(bool); connect(textEdit-document(), SIGNAL(modificationChanged(bool), this, SLOT(setWindowModified(bool); connect(textEdit-document(), SIGNAL(undoAvailable(bool), actionUndo, SLOT(setEnabled(bool); connect(textEdit-document(), SIGNAL(redoAvailable(bool), actionRedo, SLOT(setEnabled(bool); setWindowModified(textEdit-document()-isModified(); actionSave-setEnabled(textEdit-document()-isModified(); actionUndo-setEnabled(textEdit-document()-isUndoAvailable(); actionRedo-setEnabled(textEdit-document()-isRedoAvailable(); connect(actionUndo, SIGNAL(triggered(), textEdit, SLOT(undo(); connect(actionRedo, SIGNAL(triggered(), textEdit, SLOT(redo(); actionCut-setEnabled(false); actionCopy-setEnabled(false); connect(actionCut, SIGNAL(triggered(), textEdit, SLOT(cut(); connect(actionCopy, SIGNAL(triggered(), textEdit, SLOT(copy(); connect(actionPaste, SIGNAL(triggered(), textEdit, SLOT(paste(); connect(textEdit, SIGNAL(copyAvailable(bool), actionCut, SLOT(setEnabled(bool); connect(textEdit, SIGNAL(copyAvailable(bool), actionCopy, SLOT(setEnabled(bool); connect(QApplication:clipboard(), SIGNAL(dataChanged(), this, SLOT(clipboardDataChanged(); QString initialFile = 文本编辑器; const QStringList args = QCoreApplication:arguments(); if (args.count() = 2) initialFile = args.at(1); if (!load(initialFile) fileNew();void TextEdit:closeEvent(QCloseEvent *e) if (maybeSave() e-accept(); else e-ignore();void TextEdit:setupFileActions() QToolBar *tb = new QToolBar(this); tb-setWindowTitle(tr(File Actions); addToolBar(tb); QMenu *menu = new QMenu(&文件, this); menuBar()-addMenu(menu); QAction *a; a = new QAction(QIcon(rsrcPath + /filenew.png), &新建, this); a-setShortcut(QKeySequence:New); connect(a, SIGNAL(triggered(), this, SLOT(fileNew(); tb-addAction(a); menu-addAction(a); a = new QAction(QIcon(rsrcPath + /fileopen.png), &打开, this); a-setShortcut(QKeySequence:Open); connect(a, SIGNAL(triggered(), this, SLOT(fileOpen(); tb-addAction(a); menu-addAction(a); menu-addSeparator(); actionSave = a = new QAction(QIcon(rsrcPath + /filesave.png), &保存, this); a-setShortcut(QKeySequence:Save); connect(a, SIGNAL(triggered(), this, SLOT(fileSave(); a-setEnabled(false); tb-addAction(a); menu-addAction(a); a = new QAction(&另存为., this); connect(a, SIGNAL(triggered(), this, SLOT(fileSaveAs(); menu-addAction(a); menu-addSeparator(); a = new QAction(QIcon(rsrcPath + /fileprint.png), &打印, this); a-setShortcut(QKeySequence:Print); connect(a, SIGNAL(triggered(), this, SLOT(filePrint(); tb-addAction(a); menu-addAction(a); a = new QAction(QIcon(rsrcPath + /fileprint.png), &打印预览, this); connect(a, SIGNAL(triggered(), this, SLOT(filePrintPreview(); menu-addAction(a); a = new QAction(QIcon(rsrcPath + /exportpdf.png), &转换为 PDF., this); a-setShortcut(Qt:CTRL + Qt:Key_D); connect(a, SIGNAL(triggered(), this, SLOT(filePrintPdf(); tb-addAction(a); menu-addAction(a); menu-addSeparator(); a = new QAction(&退出, this); a-setShortcut(Qt:CTRL + Qt:Key_Q); connect(a, SIGNAL(triggered(), this, SLOT(close(); menu-addAction(a);void TextEdit:setupEditActions() QToolBar *tb = new QToolBar(this); tb-setWindowTitle(tr(Edit Actions); addToolBar(tb); QMenu *menu = new QMenu(&编辑, this); menuBar()-addMenu(menu); QAction *a; a = actionUndo = new QAction(QIcon(rsrcPath + /editundo.png),&撤销, this); a-setShortcut(QKeySequence:Undo); tb-addAction(a); menu-addAction(a); a = actionRedo = new QAction(QIcon(rsrcPath + /editredo.png), &恢复, this); a-setShortcut(QKeySequence:Redo); tb-addAction(a); menu-addAction(a); menu-addSeparator(); a = actionCut = new QAction(QIcon(rsrcPath + /editcut.png), &剪切, this); a-setShortcut(QKeySequence:Cut); tb-addAction(a); menu-addAction(a); a = actionCopy = new QAction(QIcon(rsrcPath + /editcopy.png), &复制, this); a-setShortcut(QKeySequence:Copy); tb-addAction(a); menu-addAction(a); a = actionPaste = new QAction(QIcon(rsrcPath + /editpaste.png), &粘贴, this); a-setShortcut(QKeySequence:Paste); tb-addAction(a); menu-addAction(a); actionPaste-setEnabled(!QApplication:clipboard()-text().isEmpty();void TextEdit:setupTextActions() QToolBar *tb = new QToolBar(this); tb-setWindowTitle(tr(Format Actions); addToolBar(tb); QMenu *menu = new QMenu(&格式, this); menuBar()-addMenu(menu); actionTextBold = new QAction(QIcon(rsrcPath + /textbold.png), &加粗, this); actionTextBold-setShortcut(Qt:CTRL + Qt:Key_B); QFont bold; bold.setBold(true); actionTextBold-setFont(bold); connect(actionTextBold, SIGNAL(triggered(), this, SLOT(textBold(); tb-addAction(actionTextBold); menu-addAction(actionTextBold); actionTextBold-setCheckable(true); actionTextItalic = new QAction(QIcon(rsrcPath + /textitalic.png), &斜体, this); actionTextItalic-setShortcut(Qt:CTRL + Qt:Key_I); QFont italic; italic.setItalic(true); actionTextItalic-setFont(italic); connect(actionTextItalic, SIGNAL(triggered(), this, SLOT(textItalic(); tb-addAction(actionTextItalic); menu-addAction(actionTextItalic); actionTextItalic-setCheckable(true); actionTextUnderline = new QAction(QIcon(rsrcPath + /textunder.png), &下划线, this); actionTextUnderline-setShortcut(Qt:CTRL + Qt:Key_U); QFont underline; underline.setUnderline(true); actionTextUnderline-setFont(underline); connect(actionTextUnderline, SIGNAL(triggered(), this, SLOT(textUnderline(); tb-addAction(actionTextUnderline); menu-addAction(actionTextUnderline); actionTextUnderline-setCheckable(true); menu-addSeparator(); QActionGroup *grp = new QActionGroup(this); connect(grp, SIGNAL(triggered(QAction *), this, SLOT(textAlign(QAction *); actionAlignLeft = new QAction(QIcon(rsrcPath + /textleft.png), &左对齐, grp); actionAlignLeft-setShortcut(Qt:CTRL + Qt:Key_L); actionAlignLeft-setCheckable(true); actionAlignCenter = new QAction(QIcon(rsrcPath + /textcenter.png), &中间对齐, grp); actionAlignCenter-setShortcut(Qt:CTRL + Qt:Key_E); actionAlignCenter-setCheckable(true); actionAlignRight = new QAction(QIcon(rsrcPath + /textright.png), &右对齐, grp); actionAlignRight-setShortcut(Qt:CTRL + Qt:Key_R); actionAlignRight-setCheckable(true); actionAlignJustify = new QAction(QIcon(rsrcPath + /textjustify.png), &整理, grp); actionAlignJustify-setShortcut(Qt:CTRL + Qt:Key_J); actionAlignJustify-setCheckable(true); tb-addActions(grp-actions(); menu-addActions(grp-actions(); menu-addSeparator(); QPixmap pix(16, 16); pix.fill(Qt:black); actionTextColor = new QAction(pix, &字体颜色., this); connect(actionTextColor, SIGNAL(triggered(), this, SLOT(textColor(); tb-addAction(actionTextColor); menu-addAction(actionTextColor); tb = new QToolBar(this); tb-setAllowedAreas(Qt:TopToolBarArea | Qt:BottomToolBarArea); tb-setWindowTitle(tr(Format Actions); addToolBarBreak(Qt:TopToolBarArea); addToolBar(tb); comboStyle = new QComboBox(tb); tb-addWidget(comboStyle); comboStyle-addItem(Standard); comboStyle-addItem(Bullet List (Disc); comboStyle-addItem(Bullet List (Circle); comboStyle-addItem(Bullet List (Square); comboStyle-addItem(Ordered List (Decimal); comboStyle-addItem(Ordered List (Alpha lower); comboStyle-addItem(Ordered List (Alpha upper); connect(comboStyle, SIGNAL(activated(int), this, SLOT(textStyle(int); comboFont = new QFontComboBox(tb); tb-addWidget(comboFont); connect(comboFont, SIGNAL(activated(const QString &), this, SLOT(textFamily(const QString &); comboSize = new QComboBox(tb); comboSize-setObjectName(comboSize); tb-addWidget(comboSize); comboSize-setEditable(true); QFontDatabase db; foreach(int size, db.standardSizes() comboSize-addItem(QString:number(size); connect(comboSize, SIGNAL(activated(const QString &), this, SLOT(textSize(const QString &); comboSize-setCurrentIndex(comboSize-findText(QString:number(QApplication:font() .pointSize();bool TextEdit:load(const QString &f) if (!QFile:exists(f) return false; QFile file(f); if (!file.open(QFile:ReadOnly) return false; QByteArray data = file.readAll(); QTextCodec *codec = Qt:codecForHtml(data); QString str = codec-toUnicode(data); if (Qt:mightBeRichText(str) textEdit-setHtml(str); else str = QString:fromLocal8Bit(data); textEdit-setPlainText(str); setCurrentFileName(f); return true;bool TextEdit:maybeSave() if (!textEdit-document()-isModified() return true; if (fileName.startsWith(QLatin1String(:/) return true; QMessageBox:StandardButton ret; ret = QMessageBox:warning(this, tr(Application), 文件尚未保存，是否保存？, QMessageBox:Yes | QMessageBox:No | QMessageBox:Cancel); if (ret = QMessageBox:Yes) return fileSave(); else if (ret = QMessageBox:Cancel) return false; return true;void TextEdit:setCurrentFileName(const QString &fileName) this-fileName = fileName; textEdit-document()-setModified(false); QString shownName; if (fileName.isEmpty() shownName = 我的文本编辑器; else shownName = QFileInfo(fileName).fileName(); setWindowTitle(tr(%1*).arg(shownName); setWindowModified(false);void TextEdit:fileNew() if (maybeSave() textEdit-clear(); setCurrentFileName(QString(); void TextEdit:fileOpen() QString fn = QFileDialog:getOpenFileName(this, tr(Open File.), QString(), tr(TXT-Files (*.txt);All Files (*); if (!fn.isEmpty() load(fn);bool TextEdit:fileSave() if (fileName.isEmpty() return fileSaveAs(); QFile file(fileName); if (!file.open(QFile:WriteOnly) return false; QTextStream ts(&file); ts.setCodec(QTextCodec:codecForName(UTF-8); ts document()-toHtml(UTF-8); textEdit-document()-setModified(false); return true;bool TextEdit:fileSaveAs() QString fn = QFileDialog:getSaveFileName(this, tr(Save as.), QString(), tr(TXT-Files (*.txt);All Files (*); if (fn.isEmpty() return false; setCurrentFileName(fn); return fileSave();void TextEdit:filePrint()#ifndef QT_NO_PRINTER QPrinter printer(QPrinter:HighResolution); QPrintDialog *dlg = new QPrintDialog(&printer, this); if (textEdit-textCursor().hasSelection() dlg-addEnabledOption(QAbstractPrintDialog:PrintSelection); dlg-setWindowTitle(tr(Print Document); if (dlg-exec() = QDialog:Accepted) textEdit-print(&printer); delete dlg;#endifvoid TextEdit:filePrintPreview()#ifndef QT_NO_PRINTER QPrinter printer(QPrinter:HighResolution); QPrintPreviewDialog preview(&printer, this); connect(&preview, SIGNAL(paintRequested(QPrinter *), SLOT(printPreview(QPrinter *); preview.exec();#endifvoid TextEdit:printPreview(QPrinter *printer)#ifdef QT_NO_PRINTER Q_UNUSED(printer);#else textEdit-print(printer);#endifvoid TextEdit:filePrintPdf()#ifndef QT_NO_PRINTER/! 0 QString fileName = QFileDialog:getSaveFileName(this, 转换为 PDF, QString(), *.pdf); if (!fileName.isEmpty() if (QFileInfo(fileName).suffix().isEmpty() fileName.append(.pdf); QPrinter printer(QPrinter:HighResolution); printer.setOutputFormat(QPrinter:PdfFormat); printer.setOutputFileName(fileName); textEdit-do