Qt4系列之開發(fā)文本編輯器

mainwindow.h:

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include

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namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

Q_OBJECT

public:

explicit MainWindow(QWidget *parent = 0);

void createAction();

void createMenu();

void createToolBar();

void fileRead();//讀文件

void fileWrite();//寫文件

~MainWindow();

public:

Ui::MainWindow *ui;

QMenu *file;

QMenu *edit;

QMenu *style;

QMenu *insert;//插入菜單

QMenu *search;//查找菜單

QMenu *help;//幫助菜單

QToolBar *fileToolBar;

QToolBar *editToolBar;

QToolBar *styleToolBar;

QToolBar *insertToolBar;

QToolBar *searchToolBar;

QToolBar *helpToolBar;

QTextEdit *textEdit;

QAction *newFile;

QAction *openFile;

QAction *save;

QAction *saveAs;

QAction *printText;

QAction *exit;

QAction *undoAction;//撤銷

QAction *redoAction;//恢復(fù)

QAction *copy;

QAction *cut;

QAction *paste;

QAction *insertImg;

QAction *insertTable;

QAction *find;

QAction *about;

QAction *aboutQt;

QAction *bold;

QAction *italic;

QAction *underLine;

QAction *color;

QAction *left;

QAction *center;

QAction *right;

QAction *justify;

QActionGroup *group;

QLabel *fontLabel;

QLabel *fontSizeLabel;

QFontComboBox *fontCom;

QComboBox *fontSizeCom;

QString fileName;

QLineEdit *lineEdit;

QLabel *label;

QPushButton *btn;

QVBoxLayout *layout;

QLineEdit *column;

QLineEdit *row;

private slots:

void findNext();

void NewFile();

void OpenFile();

void Save();

void SaveAs();

void Color();

void Bold();

void Italic();

void UnderLine();

void ALignment(QAction *);

void PrintText();

void InsertImage();

void InsertTable();

void mergeFormat(QTextCharFormat);

void FontComBox(QString fontComStr);

void FontSizeCom(QString fontSizeStr);

void Find();

void About();

void AboutQt();

void showCurrentCharFormatChanged(const QTextCharFormat &form);

};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"

#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

QTextCodec::setCodecForTr(QTextCodec::codecForLocale());

setWindowIcon(QIcon(":/images/textEditor.png"));

setWindowTitle(tr("Qt文本編輯器"));

textEdit = new QTextEdit();

setCentralWidget(textEdit);

createAction();//創(chuàng)建動(dòng)作

createMenu();//創(chuàng)建菜單

createToolBar();//創(chuàng)建工具欄

//文件菜單的動(dòng)作與槽的連接

connect(newFile,SIGNAL(triggered()),this,SLOT(NewFile()));

connect(openFile,SIGNAL(triggered()),this,SLOT(OpenFile()));

connect(save,SIGNAL(triggered()),this,SLOT(Save()));

connect(saveAs,SIGNAL(triggered()),this,SLOT(SaveAs()));

connect(exit,SIGNAL(triggered()),this,SLOT(close()));

//編輯菜單的動(dòng)作與槽的連接

connect(cut,SIGNAL(triggered()),textEdit,SLOT(cut()));

connect(copy,SIGNAL(triggered()),textEdit,SLOT(copy()));

connect(paste,SIGNAL(triggered()),textEdit,SLOT(paste()));

connect(undoAction,SIGNAL(triggered()),textEdit,SLOT(undo()));

connect(redoAction,SIGNAL(triggered()),textEdit,SLOT(redo()));

//字體設(shè)置動(dòng)作與槽的連接

connect(fontCom,SIGNAL(activated(QString)),this,

SLOT(FontComBox(QString)));

//字號(hào)設(shè)置動(dòng)作與槽的連接

connect(fontSizeCom,SIGNAL(activated(QString)),this,SLOT(FontSizeCom(QString)));

connect(textEdit,SIGNAL(currentCharFormatChanged(QTextCharFormat&)),

this,SLOT(showCurrentCharFormatChanged(QTextCharFormat&)));

//顏色編輯動(dòng)作與槽的連接

connect(color,SIGNAL(triggered()),this,SLOT(Color()));

//格式菜單動(dòng)作與槽的連接

connect(bold,SIGNAL(triggered()),this,SLOT(Bold()));

connect(italic,SIGNAL(triggered()),this,SLOT(Italic()));

connect(underLine,SIGNAL(triggered()),this,SLOT(UnderLine()));

connect(group,SIGNAL(triggered(QAction*)),this,SLOT(ALignment(QAction *)));

//插入菜單動(dòng)作與槽的連接

connect(insertImg,SIGNAL(triggered()),this,SLOT(InsertImage()));

connect(insertTable,SIGNAL(triggered()),this,SLOT(InsertTable()));

//打印動(dòng)作與槽的連接

connect(printText,SIGNAL(triggered()),this,SLOT(PrintText()));

//查找菜單動(dòng)作與槽的連接

connect(find,SIGNAL(triggered()),this,SLOT(Find()));

connect(about,SIGNAL(triggered()),this,SLOT(About()));

connect(aboutQt,SIGNAL(triggered()),this,SLOT(AboutQt()));

resize(1000,600);

}

//創(chuàng)建動(dòng)作

void MainWindow::createAction(){

QTextCodec::setCodecForTr(QTextCodec::codecForLocale());

//新建文件

newFile = new QAction(QIcon(":/images/new.png"),tr("新建文件"),this);

newFile->setShortcut(tr("Ctrl+N"));

newFile->setStatusTip(tr("新建一個(gè)文件"));

//打開文件

openFile = new QAction(QIcon(":/images/open.png"),tr("打開文件"),this);

openFile->setShortcut(tr("Ctrl+O"));

openFile->setStatusTip(tr("打開一個(gè)文件"));

//保存文件

save = new QAction(QIcon(":/images/save.png"),tr("保存"),this);

save->setShortcut(tr("Ctrl+S"));

save->setStatusTip(tr("保存文件"));

//另存為

saveAs = new QAction(QIcon(":/images/saveAs.png"),tr("另存為"),this);

saveAs->setShortcut(tr("Ctrl+A"));

saveAs->setStatusTip(tr("文件另存為"));

//打印

printText = new QAction(QIcon(":/images/printText.png"),tr("打印"),this);

printText->setShortcut(tr("Ctrl+P"));

printText->setStatusTip(tr("打印"));

//退出

exit = new QAction(QIcon(":/images/exit.png"),tr("退出"),this);

exit->setShortcut(tr("Ctrl+E"));

exit->setStatusTip(tr("退出"));

//恢復(fù)

redoAction = new QAction(QIcon(":/images/redo.png"),tr("恢復(fù)"),this);

redoAction->setShortcut(tr("Ctrl+R"));

redoAction->setStatusTip(tr("恢復(fù)"));

//撤銷

undoAction = new QAction(QIcon(":/images/undo.png"),tr("撤銷"),this);

undoAction->setShortcut(tr("Ctrl+U"));

undoAction->setStatusTip(tr("撤銷"));

//剪切

cut = new QAction(QIcon(":/images/cut.png"),tr("剪切"),this);

cut->setShortcut(tr("Ctrl+X"));

cut->setStatusTip(tr("剪切"));

//復(fù)制

copy = new QAction(QIcon(":/images/copy.png"),tr("復(fù)制"),this);

copy->setShortcut(tr("Ctrl+C"));

copy->setStatusTip(tr("復(fù)制"));

//粘貼

paste = new QAction(QIcon(":/images/paste.png"),tr("黏貼"),this);

paste->setShortcut(tr("Ctrl+P"));

paste->setStatusTip(tr("粘貼"));

//粗體

bold = new QAction(QIcon(":/images/bold.png"),tr("粗體"),this);

bold->setStatusTip(tr("粗體字"));

bold->setCheckable(true);

//斜體

italic = new QAction(QIcon(":/images/italic.png"),tr("斜體"),this);

italic->setStatusTip(tr("斜體字"));

italic->setCheckable(true);

//下劃線

underLine = new QAction(QIcon(":/images/underline.png"),tr("下劃線"),this);

underLine->setStatusTip(tr("下劃線"));

underLine->setCheckable(true);

//顏色

color = new QAction(QIcon(":/images/color.png"),tr("顏色"),this);

color->setShortcut(tr("Ctrl+C"));

color->setStatusTip(tr("顏色編輯"));

group = new QActionGroup(this);

//左對(duì)齊

left = new QAction(QIcon(":/images/left.png"),tr("左對(duì)齊"),group);

left->setStatusTip(tr("左對(duì)齊"));

left->setCheckable(true);

//居中

center = new QAction(QIcon(":/images/center.png"),tr("居中對(duì)齊"),group);

center->setStatusTip(tr("居中對(duì)齊"));

center->setCheckable(true);

//右對(duì)齊

right = new QAction(QIcon(":/images/right.png"),tr("右對(duì)齊"),group);

right->setStatusTip(tr("右對(duì)齊"));

right->setCheckable(true);

//兩端對(duì)齊

justify = new QAction(QIcon(":/images/justify.png"),tr("兩端對(duì)齊"),group);

justify->setStatusTip(tr("兩端對(duì)齊"));

justify->setCheckable(true);

group->addAction(left);

group->addAction(center);

group->addAction(right);

group->addAction(justify);

//插入圖片

insertImg = new QAction(QIcon(":/images/image.png"),tr("插入圖片"),this);

insertImg->setStatusTip(tr("插入圖片"));

//插入表格

insertTable = new QAction(QIcon(":/images/table.png"),tr("插入表格"),this);

insertTable->setStatusTip(tr("插入表格"));

//查找

find = new QAction(QIcon(":/images/find.png"),tr("查找"),this);

find->setShortcut(tr("Ctrl+F"));

find->setStatusTip(tr("查找"));

//關(guān)于

about = new QAction(QIcon(":/images/about.png"),tr("關(guān)于"),this);

about->setStatusTip(tr("關(guān)于"));

//字體

fontLabel = new QLabel(tr("字體"));

fontCom = new QFontComboBox();

fontCom->setFontFilters(QFontComboBox::ScalableFonts);

fontCom->setStatusTip(tr("字體設(shè)置"));

//字號(hào)

fontSizeLabel = new QLabel(tr("字號(hào)"));

QFontDatabase db;

fontSizeCom = new QComboBox();

foreach(int size,db.standardSizes())

fontSizeCom->addItem(QString::number(size));

fontSizeCom->setStatusTip(tr("字號(hào)設(shè)置"));

//關(guān)于

aboutQt = new QAction(tr("關(guān)于QT"),this);

aboutQt->setStatusTip(tr("關(guān)于Qt"));

}

//創(chuàng)建菜單

void MainWindow::createMenu(){

//文件菜單

file = menuBar()->addMenu(tr("文件(&F)"));

file->addAction(newFile);

file->addAction(openFile);

file->addSeparator();

file->addAction(save);

file->addAction(saveAs);

file->addSeparator();

file->addAction(printText);

file->addSeparator();

file->addAction(exit);

//編輯菜單

edit = menuBar()->addMenu(tr("編輯(&E)"));

edit->addAction(undoAction);

edit->addAction(redoAction);

edit->addSeparator();

edit->addAction(cut);

edit->addAction(copy);

edit->addAction(paste);

//插入菜單

insert = menuBar()->addMenu(tr("插入(&I)"));

insert->addAction(insertImg);

insert->addAction(insertTable);

//查找菜單

search = menuBar()->addMenu(tr("查找(&F)"));

search->addAction(find);

//格式菜單

style = menuBar()->addMenu(tr("格式(&S)"));

style->addAction(bold);

style->addAction(italic);

style->addAction(underLine);

style->addSeparator();

style->addAction(color);

style->addSeparator();

style->addAction(left);

style->addAction(center);

style->addAction(right);

style->addAction(justify);

//幫助菜單

help = menuBar()->addMenu(tr("幫助(&H)"));

help->addAction(about);

help->addAction(aboutQt);

}

//創(chuàng)建工具欄

void MainWindow::createToolBar(){

//文件

fileToolBar = addToolBar(tr("文件(&N)"));

fileToolBar->addAction(newFile);

fileToolBar->addAction(openFile);

fileToolBar->addSeparator();

fileToolBar->addAction(save);

fileToolBar->addAction(saveAs);

fileToolBar->addSeparator();

fileToolBar->addAction(printText);

fileToolBar->addSeparator();

//編輯

editToolBar = addToolBar(tr("編輯(&E)"));

editToolBar->addAction(undoAction);

editToolBar->addAction(redoAction);

editToolBar->addSeparator();

editToolBar->addAction(cut);

editToolBar->addAction(copy);

editToolBar->addAction(paste);

//格式

styleToolBar = addToolBar(tr("格式(&S)"));

styleToolBar->addAction(bold);

styleToolBar->addAction(italic);

styleToolBar->addAction(underLine);

styleToolBar->addSeparator();

styleToolBar->addAction(left);

styleToolBar->addAction(center);

styleToolBar->addAction(right);

styleToolBar->addAction(justify);

styleToolBar->addSeparator();

styleToolBar->addWidget(fontLabel);

styleToolBar->addWidget(fontCom);

styleToolBar->addWidget(fontSizeLabel);

styleToolBar->addWidget(fontSizeCom);

//插入

insertToolBar = addToolBar(tr("插入(&I)"));

insertToolBar->addAction(insertImg);

insertToolBar->addAction(insertTable);

insertToolBar->addSeparator();

//查找

searchToolBar = addToolBar(tr("查找(&F)"));

searchToolBar->addAction(find);

search->addSeparator();

}

//封裝的讀文件,用于精簡程序

void MainWindow::fileRead(){

QFile file(fileName);

if(!file.open(QFile::ReadOnly|QFile::Text)){

QMessageBox::warning(this,tr("多文檔編輯器"),

tr("不可以打開文件%1:\n%2").arg(fileName).arg(file.errorString()));

return;

}

QTextStream in(&file);

QApplication::setOverrideCursor(Qt::WaitCursor);

textEdit->setPlainText(in.readAll());

QApplication::restoreOverrideCursor();

}

//封裝的寫文件,用于精簡程序

void MainWindow::fileWrite(){

QFile file(fileName);

if(!file.open(QFile::WriteOnly|QFile::Text)){

QMessageBox::warning(this,tr("多文檔編輯器"),

tr("不可以寫入文件%1:/n%2").arg(fileName).arg(file.errorString()));

return;

}

QTextStream out(&file);

QApplication::setOverrideCursor(Qt::WaitCursor);

out<toPlainText();

QApplication::restoreOverrideCursor();

return;

}

//新建文件

void MainWindow::NewFile(){

MainWindow *newEdit = new MainWindow;

newEdit->show();

}

//打開文件

void MainWindow::OpenFile(){

fileName = QFileDialog::getOpenFileName(this,tr("打開文件"),"/","allFile(*.*)");

if(!fileName.isEmpty()){

if(textEdit->document()->isEmpty()){

fileRead();

}else{

MainWindow *newEdit = new MainWindow;

newEdit->show();

QFile file(fileName);

if(!file.open(QFile::ReadOnly|QFile::Text)){

QMessageBox::warning(this,tr("多文檔編輯器"),

tr("不可以打開文件%1:\n%2").arg(fileName).arg(file.errorString()));

return;

}

QTextStream in(&file);

QApplication::setOverrideCursor(Qt::WaitCursor);

newEdit->textEdit->setPlainText(in.readAll());

QApplication::restoreOverrideCursor();

}

}

}

//保存文件

void MainWindow::Save(){

if(fileName.isEmpty()){

fileName = QFileDialog::getSaveFileName(this,tr("另存為"),tr("未命名.txt"));

fileWrite();

}else{

fileWrite();

}

}

//另存為

void MainWindow::SaveAs(){

fileName = QFileDialog::getSaveFileName(this,tr("另存為"),tr("未命名.txt"));

fileWrite();

}

//字體設(shè)置

void MainWindow::FontComBox(QString fontComStr){

QTextCharFormat format;

format.setFontFamily(fontComStr);

mergeFormat(format);

}

void MainWindow::mergeFormat(QTextCharFormat format){

QTextCursor cursor = textEdit->textCursor();

if(!cursor.hasSelection())

cursor.select(QTextCursor::WordUnderCursor);

cursor.mergeCharFormat(format);

textEdit->mergeCurrentCharFormat(format);

}

//字號(hào)設(shè)置

void MainWindow::FontSizeCom(QString fontSizeStr){

QTextCharFormat format;

format.setFontPointSize(fontSizeStr.toFloat());

textEdit->mergeCurrentCharFormat(format);

}

//顏色設(shè)置

void MainWindow::Color(){

QColor color = QColorDialog::getColor(Qt::blue,this);

if(color.isValid()){

QTextCharFormat format;

format.setForeground(color);

textEdit->mergeCurrentCharFormat(format);

}

}

//粗體

void MainWindow::Bold(){

QTextCharFormat format;

format.setFontWeight(bold->isChecked()?QFont::Bold:QFont::Normal);

textEdit->mergeCurrentCharFormat(format);

}

//斜體

void MainWindow::Italic(){

QTextCharFormat format;

format.setFontItalic(italic->isChecked());

textEdit->mergeCurrentCharFormat(format);

}

//下劃線

void MainWindow::UnderLine(){

QTextCharFormat format;

format.setFontUnderline(underLine->isChecked());

textEdit->mergeCurrentCharFormat(format);

}

//對(duì)齊

void MainWindow::ALignment(QAction *act){

if(act == left){

textEdit->setAlignment(Qt::AlignLeft);

}else if(act == center){

textEdit->setAlignment(Qt::AlignCenter);

}else if(act == right){

textEdit->setAlignment(Qt::AlignRight);

}else if(act == justify){

textEdit->setAlignment(Qt::AlignJustify);

}

}

//插入圖片

void MainWindow::InsertImage(){

QTextCursor cursor = textEdit->textCursor();

QTextImageFormat format;

QString image = QFileDialog::getOpenFileName(this,"insert image","/","png(*.png)");

format.setName(image);

cursor.insertImage(format);

}

//插入表格,用到輸入對(duì)話框

void MainWindow::InsertTable(){

bool ok;

int a = QInputDialog::getInt(this,tr("插入表格"),tr("輸入行數(shù):"),0,0,300,1,&ok);

int b = QInputDialog::getInt(this,tr("插入表格"),tr("輸入列數(shù):"),0,0,300,1,&ok);

if(ok){

QTextCursor cursor = textEdit->textCursor();

QTextTableFormat format;

format.setCellSpacing(0);

format.setCellPadding(30);

cursor.insertTable(a,b,format);

}

}

//查找

void MainWindow::Find(){

QDialog *dialog = new QDialog(this);

dialog->setWindowTitle(tr("查找"));

lineEdit = new QLineEdit(dialog);

label = new QLabel(this);

btn = new QPushButton(dialog);

btn->setText(tr("下一個(gè)"));

connect(btn,SIGNAL(clicked()),this,SLOT(findNext()));

layout = new QVBoxLayout();

layout->addWidget(lineEdit);

layout->addWidget(btn);

dialog->setLayout(layout);

dialog->resize(60,60);

dialog->show();

}

void MainWindow::findNext(){

QString str = lineEdit->text();

bool isfind = textEdit->find(str,QTextDocument::FindBackward);

if(isfind){

label->setText(tr("查找目標(biāo)在,行號(hào):%1 列號(hào):%2!").arg(textEdit->textCursor().blockNumber()).arg(textEdit->textCursor().columnNumber()));

ui->statusBar->addPermanentWidget(label);

}

}

//打印

void MainWindow::PrintText(){

QPrinter printer;

QPrintDialog printDialog(&printer,this);

if(printDialog.exec()){

QTextDocument *textDocument = textEdit->document();

textDocument->print(&printer);

}

}

//幫助

void MainWindow::About(){

QMessageBox::about(this,tr("關(guān)于"),tr("這是一個(gè)文本編輯器"));

}

void MainWindow::AboutQt(){

QMessageBox::aboutQt(this,tr("Qt編輯器"));

}

void MainWindow::showCurrentCharFormatChanged(const QTextCharFormat &form){

fontCom->setCurrentIndex(fontCom->findText(form.fontFamily()));

fontSizeCom->setCurrentIndex(fontSizeCom->findText(QString::number(form.fontPointSize())));

bold->setChecked(form.font().bold());

italic->setChecked(form.font().italic());

underLine->setChecked(form.font().underline());

}

MainWindow::~MainWindow()

{

delete ui;

}

main.cpp:

#include

#include "mainwindow.h"

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

MainWindow w;

w.show();

return a.exec();

}

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Qt

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版權(quán)聲明：本文內(nèi)容由網(wǎng)絡(luò)用戶投稿，版權(quán)歸原作者所有，本站不擁有其著作權(quán)，亦不承擔(dān)相應(yīng)法律責(zé)任。如果您發(fā)現(xiàn)本站中有涉嫌抄襲或描述失實(shí)的內(nèi)容，請(qǐng)聯(lián)系我們jiasou666@gmail.com 處理，核實(shí)后本網(wǎng)站將在24小時(shí)內(nèi)刪除侵權(quán)內(nèi)容。