1、附錄 文本編輯器代碼 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 $RESOURC

2、ES *.pro *.html *.doc imagessources.path = $QT_INSTALL_DEMOS/texteditINSTALLS += target sources textedit.h#ifndef TEXTEDIT_H#define TEXTEDIT_H#include <QMainWindow>#include <QMap>#include <QPointer>QT_FORWARD_DECLARE_CLASS(QAction)QT_FORWARD_DECLARE_CLASS(QComboBox)QT_FORWARD_DECLA

3、RE_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(); voi

4、d 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(); v

5、oid 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 cursorPositionChan

6、ged(); 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, *ac

7、tionTextBold, *actionTextUnderline, *actionTextItalic, *actionTextColor, *actionAlignLeft, *actionAlignCenter, *actionAlignRight, *actionAlignJustify, *actionUndo, *actionRedo, *actionCut, *actionCopy, *actionPaste; QComboBox *comboStyle; QFontComboBox *comboFont; QComboBox *comboSize; QToolBar *tb;

8、 QString fileName; QTextEdit *textEdit;#endif main.cpp#include "textedit.h"#include <QApplication>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 "text

9、edit.h"#include <QAction>#include <QApplication>#include <QClipboard>#include <QColorDialog>#include <QComboBox>#include <QFontComboBox>#include <QFile>#include <QFileDialog>#include <QFileInfo>#include <QFontDatabase>#include <QMen

10、u>#include <QMenuBar>#include <QPrintDialog>#include <QPrinter>#include <QTextCodec>#include <QTextEdit>#include <QToolBar>#include <QTextCursor>#include <QTextList>#include <QtDebug>#include <QCloseEvent>#include <QMessageBox>#inc

11、lude <QPrintPreviewDialog>#include <QTextCodec>#ifdef Q_WS_MACconst QString rsrcPath = ":/images/mac"#elseconst QString rsrcPath = ":/images/win"#endifTextEdit:TextEdit(QWidget *parent) : QMainWindow(parent) this->setWindowTitle(QString("文本編輯器"); QTextCod

12、ec:setCodecForCStrings(QTextCodec:codecForName("UTF-8"); setupFileActions(); setupEditActions(); setupTextActions(); QMenu *helpMenu = new QMenu("幫助", this); menuBar()->addMenu(helpMenu); helpMenu->addAction("關于", this, SLOT(about(); helpMenu->addAction("關

13、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(

14、); 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

15、); 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); se

16、tWindowModified(textEdit->document()->isModified(); actionSave->setEnabled(textEdit->document()->isModified(); actionUndo->setEnabled(textEdit->document()->isUndoAvailable(); actionRedo->setEnabled(textEdit->document()->isRedoAvailable(); connect(actionUndo, SIGNAL(t

17、riggered(), 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(act

18、ionPaste, 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(clipboardDataChang

19、ed(); QString initialFile = "文本編輯器" 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:setupFileAc

20、tions() 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->se

21、tShortcut(QKeySequence:New); connect(a, SIGNAL(triggered(), this, SLOT(fileNew(); tb->addAction(a); menu->addAction(a); a = new QAction(QIcon(rsrcPath + "/fileopen.png"), "&打開", this); a->setShortcut(QKeySequence:Open); connect(a, SIGNAL(triggered(), this, SLOT(fileO

22、pen(); 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-&g

23、t;addAction(a); menu->addAction(a); a = new QAction("&另存為.", 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(QKe

24、ySequence:Print); connect(a, SIGNAL(triggered(), this, SLOT(filePrint(); tb->addAction(a); menu->addAction(a); a = new QAction(QIcon(rsrcPath + "/fileprint.png"), "&打印預覽", this); connect(a, SIGNAL(triggered(), this, SLOT(filePrintPreview(); menu->addAction(a); a = ne

25、w QAction(QIcon(rsrcPath + "/exportpdf.png"), "&轉換為 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);

26、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("&編輯", this);

27、menuBar()->addMenu(menu); QAction *a; a = actionUndo = new QAction(QIcon(rsrcPath + "/editundo.png"),"&撤銷", this); a->setShortcut(QKeySequence:Undo); tb->addAction(a); menu->addAction(a); a = actionRedo = new QAction(QIcon(rsrcPath + "/editredo.png"), &q

28、uot;&恢復", 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->

29、addAction(a); a = actionCopy = new QAction(QIcon(rsrcPath + "/editcopy.png"), "&復制", this); a->setShortcut(QKeySequence:Copy); tb->addAction(a); menu->addAction(a); a = actionPaste = new QAction(QIcon(rsrcPath + "/editpaste.png"), "&粘貼", this)

30、; 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); QMe

31、nu *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); co

32、nnect(actionTextBold, SIGNAL(triggered(), this, SLOT(textBold(); tb->addAction(actionTextBold); menu->addAction(actionTextBold); actionTextBold->setCheckable(true); actionTextItalic = new QAction(QIcon(rsrcPath + "/textitalic.png"), "&斜體", this); actionTextItalic->

33、;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); acti

34、onTextUnderline = new QAction(QIcon(rsrcPath + "/textunder.png"), "&下劃線", this); actionTextUnderline->setShortcut(Qt:CTRL + Qt:Key_U); QFont underline; underline.setUnderline(true); actionTextUnderline->setFont(underline); connect(actionTextUnderline, SIGNAL(triggered()

35、, 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 *); ac

36、tionAlignLeft = new QAction(QIcon(rsrcPath + "/textleft.png"), "&左對齊", grp); actionAlignLeft->setShortcut(Qt:CTRL + Qt:Key_L); actionAlignLeft->setCheckable(true); actionAlignCenter = new QAction(QIcon(rsrcPath + "/textcenter.png"), "&中間對齊", grp)

37、; actionAlignCenter->setShortcut(Qt:CTRL + Qt:Key_E); actionAlignCenter->setCheckable(true); actionAlignRight = new QAction(QIcon(rsrcPath + "/textright.png"), "&右對齊", grp); actionAlignRight->setShortcut(Qt:CTRL + Qt:Key_R); actionAlignRight->setCheckable(true); a

38、ctionAlignJustify = 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->addSepara

39、tor(); QPixmap pix(16, 16); pix.fill(Qt:black); actionTextColor = new QAction(pix, "&字體顏色.", this); connect(actionTextColor, SIGNAL(triggered(), this, SLOT(textColor(); tb->addAction(actionTextColor); menu->addAction(actionTextColor); tb = new QToolBar(this); tb->setAllowedAre

40、as(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

41、 (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 (A

42、lpha 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->

43、;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 &);

44、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:codecF

45、orHtml(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

46、; 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 (r

47、et = 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 = "我的文本編輯器" else shownName = QFileInfo(fileName

48、).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(&quo

49、t;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 <<

50、 textEdit->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

51、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:PrintSelecti

52、on); 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); conn

53、ect(&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, " 轉換為 PDF", QString(), "*.pdf"); if (!fileName.isEmpty() if (QFileInfo(fileName).suffix().i