QT学习笔记之八 MDIEditor

这个程序由于期末考试搁置很久了，下午由于下大雨没出去，就把他完成了哈.....主要实现多文档编辑功能，测试了下，基本上没有bug，由于整体设计思路参考书上的，大牛们不要BS我阿.....

 

等下次有时间将他改成简易的代码编辑器好了，貌似国外网站上有相关模块，有时间去看看。。。。

 

=============================================================

程序部分代码如下：

editor.h

#ifndef EDITOR_H#define EDITOR_H#include <QTextEdit>class Editor : public QTextEdit{ Q_OBJECTpublic: Editor(QWidget *parent=0); void newFile(); bool save(); bool saveAs(); QSize sizeHint() const; QAction *windowMenuAction() const { return action ;} static Editor *open(QWidget *parent = 0); static Editor *openFile(const QString &fileName,QWidget *parent = 0);protected: void closeEvent(QCloseEvent *event);private slots: void documentWasModified();private: bool okToContinue(); bool saveFile(const QString &fileName); void setCurrentFile(const QString &fileName); bool readFile(const QString &fileName); bool writeFile(const QString &fileName); QString strippedName(const QString &fullFileName); QString curFile; bool isUntitled; QAction *action;};#endif // EDITOR_H

 

editor.cpp

#include <QtGui>#include "editor.h"/** 构造函数*/Editor::Editor(QWidget *parent) :QTextEdit(parent){ action = new QAction(this); action->setCheckable(true); connect(action,SIGNAL(triggered()),this,SLOT(show())); connect(action,SIGNAL(triggered()),this,SLOT(setFocus())); isUntitled = true; connect(document(),SIGNAL(contentsChanged()),this,SLOT(documentWasModified())); setWindowIcon(QPixmap(":/images/document.png")); setWindowTitle("[*]"); setAttribute(Qt::WA_DeleteOnClose); //Makes Qt delete this widget when the widget has accepted the close event}/** 新建文件*/void Editor::newFile(){ static int documentNumber = 1; curFile = tr("document%1.txt").arg(documentNumber); setWindowTitle(curFile + "[*]"); action->setText(curFile); isUntitled= true; ++documentNumber;}/** 保存*/bool Editor::save(){ if(isUntitled) { return saveAs(); } else { return saveFile(curFile); }}/** 另存为*/bool Editor::saveAs(){ QString fileName = QFileDialog::getSaveFileName(this,tr("Save As"),curFile); if(fileName.isEmpty()) return false; return saveFile(fileName);}/** 大小调整*/QSize Editor::sizeHint() const{ return QSize(72 * fontMetrics().width('x'),25* fontMetrics().lineSpacing()); //Returns the font metrics for the widget's current font}/** 打开*/Editor *Editor::open(QWidget *parent){ QString fileName = QFileDialog::getOpenFileName(parent,tr("Open"),"."); if(fileName.isEmpty()) return 0; return openFile(fileName,parent);}/** 打开文件*/Editor *Editor::openFile(const QString &fileName,QWidget *parent){ Editor *editor = new Editor(parent); if(editor->readFile(fileName)) { editor->setCurrentFile(fileName); return editor; } else { delete editor; return 0; }}/** 关闭事件*/void Editor::closeEvent(QCloseEvent *event){ if(okToContinue()) { event->accept(); } else { event->ignore(); }}/** 文件已被修改*/void Editor::documentWasModified(){ setWindowModified(true);}/** 是否可以继续*/bool Editor::okToContinue(){ if(document()->isModified()) { int r=QMessageBox::warning(this,tr("MDI Editor"), tr("File %1 has been modified./n").arg(strippedName(curFile), QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel)); if(r == QMessageBox::Yes) { save(); } else if (r == QMessageBox::Cancel) { return false; } } return true;}/** 文件保存*/bool Editor::saveFile(const QString &fileName){ if (writeFile(fileName)) { setCurrentFile(fileName); return true; } else { return false; }}/** 设置为当前文件*/void Editor::setCurrentFile(const QString &fileName){ curFile = fileName; isUntitled = false; action->setText(strippedName(curFile)); document()->setModified(false); setWindowTitle(strippedName(curFile)+ "[*]"); setWindowModified(false);}/** 读取文件*/bool Editor::readFile(const QString &fileName){ QFile file(fileName); if(!file.open(QIODevice::ReadOnly | QIODevice::Text)) { //设置文件读取模式 QMessageBox::warning(this,tr("MDI Editor"),tr("Cannot read file %1:/n%2."). arg(file.fileName()).arg(file.errorString())); return false; } QTextStream in(&file); QApplication::setOverrideCursor(Qt::WaitCursor); //设置鼠标 setPlainText(in.readAll()); QApplication::restoreOverrideCursor(); return true;}/** 文件写入*/bool Editor::writeFile(const QString &fileName){ QFile file(fileName); if(!file.open(QIODevice::WriteOnly | QIODevice::Text)) { QMessageBox::warning(this,tr("MDI Editor"), tr("Cannot write file %1:/n%2").arg(file.fileName()).arg(file.errorString())); return false; } QTextStream out(&file); QApplication::setOverrideCursor(Qt::WaitCursor); out<<toPlainText() ; QApplication::restoreOverrideCursor(); return true;}QString Editor::strippedName(const QString &fullFileName){ return QFileInfo(fullFileName).fileName();}

 

mainwindow.h

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QtGui/QMainWindow>class QAction;class QActionGroup;class QLabel;class QMdiArea;class QMenu;class QToolBar;class Editor;namespace Ui{ class MainWindow;}class MainWindow : public QMainWindow{ Q_OBJECTpublic: MainWindow(QWidget *parent = 0); ~MainWindow();public slots: void newFile(); void openFile(const QString &fileName);protected: void closeEvent(QCloseEvent *event);private slots: void open(); void save(); void saveAs(); void cut(); void copy(); void paste(); void about(); void updateActions(); void loadFiles();private: Ui::MainWindow *ui; void createActions(); void createMenus(); void createToolBars(); void createStatusBar(); void addEditor(Editor *editor); Editor *activeEditor(); QMdiArea *mdiArea; //The QMdiArea widget provides an area in which MDI windows are displayed QLabel *readyLabel; QWidgetList windows; //Menu QMenu *fileMenu; QMenu *editMenu; QMenu *windowMenu; QMenu *helpMenu; //ToolBar QToolBar *fileToolBar; QToolBar *editToolBar; //Actions QActionGroup *windowActionGroup; QAction *newAction; QAction *openAction; QAction *saveAction; QAction *saveAsAction; QAction *exitAction; QAction *cutAction; QAction *copyAction; QAction *pasteAction; QAction *closeAction; QAction *closeAllAction; QAction *tileAction; QAction *cascadeAction; QAction *nextAction; QAction *previousAction; QAction *separatorAction; QAction *aboutAction; QAction *aboutQtAction;};#endif // MAINWINDOW_H

 

mainwindos.cpp

#include <QtGui>#include "mainwindow.h"#include "ui_mainwindow.h"#include "editor.h"MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow){ ui->setupUi(this); mdiArea = new QMdiArea; setCentralWidget(mdiArea); connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow*)),this, SLOT(updateActions())); createActions(); createMenus(); createToolBars(); createStatusBar(); setWindowIcon(QPixmap(":/images/icon.png")); setWindowTitle("Killua MDI Editor"); QTimer::singleShot(0,this,SLOT(loadFiles()));}MainWindow::~MainWindow(){ delete ui;}/** 文件读取 */void MainWindow::loadFiles(){ QStringList args = QApplication::arguments(); args.removeFirst(); if (!args.isEmpty()) { foreach(QString arg,args) openFile(arg); mdiArea->cascadeSubWindows(); } else { newFile(); } mdiArea->activateNextSubWindow();}/** 新建文件 */void MainWindow::newFile(){ Editor *editor = new Editor; editor->newFile(); addEditor(editor);}/** 打开文件 */void MainWindow::openFile(const QString &fileName){ Editor *editor = Editor::openFile(fileName,this); if(editor) addEditor(editor);}/** 关闭事件 */void MainWindow::closeEvent(QCloseEvent *event){ mdiArea->closeAllSubWindows(); if(!mdiArea->subWindowList().isEmpty()) { event->ignore(); } else { event->accept(); }}/** 打开操作 */void MainWindow::open(){ Editor *editor = Editor::open(this); if(editor) addEditor(editor);}/** 保存文件 */void MainWindow::save(){ if(activeEditor()) activeEditor()->save();}/** 文件另存为 */void MainWindow::saveAs(){ if (activeEditor()) activeEditor()->saveAs();}/** 剪切 */void MainWindow::cut(){ if(activeEditor()) activeEditor()->cut();}/** 复制 */void MainWindow::copy(){ if(activeEditor()) activeEditor()->copy();}/** 粘贴 */void MainWindow::paste(){ if(activeEditor()) activeEditor()->paste();}/** 关于 */void MainWindow::about(){ QMessageBox::about(this,tr("About Killua MDI Editor"), tr("Design by Killua"));}/** 事件更新 */void MainWindow::updateActions(){ bool hasEditor = (activeEditor()!=0); bool hasSelection = activeEditor() && activeEditor()->textCursor().hasSelection(); saveAction->setEnabled(hasEditor); saveAsAction->setEnabled(hasEditor); cutAction->setEnabled(hasSelection); copyAction->setEnabled(hasSelection); pasteAction->setEnabled(hasEditor); closeAction->setEnabled(hasEditor); closeAllAction->setEnabled(hasEditor); tileAction->setEnabled(hasEditor); cascadeAction->setEnabled(hasEditor); nextAction->setEnabled(hasEditor); previousAction->setEnabled(hasEditor); separatorAction->setEnabled(hasEditor); if(activeEditor()) activeEditor()->windowMenuAction()->setChecked(true); //菜单栏可点击}/** 事件创建 */void MainWindow::createActions(){ //newAction newAction = new QAction(tr("&New"), this); newAction->setIcon(QIcon(":/images/new.png")); newAction->setShortcut(QKeySequence::New); connect(newAction, SIGNAL(triggered()), this, SLOT(newFile())); //openAction openAction = new QAction(tr("&Open..."), this); openAction->setIcon(QIcon(":/images/open.png")); openAction->setShortcut(QKeySequence::Open); connect(openAction, SIGNAL(triggered()), this, SLOT(open())); //saveAction saveAction = new QAction(tr("&Save"), this); saveAction->setIcon(QIcon(":/images/save.png")); saveAction->setShortcut(QKeySequence::Save); connect(saveAction, SIGNAL(triggered()), this, SLOT(save())); //saveAsAction saveAsAction = new QAction(tr("Save &As..."), this); connect(saveAsAction, SIGNAL(triggered()), this, SLOT(saveAs())); //exitAction exitAction = new QAction(tr("E&xit"), this); exitAction->setShortcut(tr("Ctrl+Q")); connect(exitAction, SIGNAL(triggered()), this, SLOT(close())); //cutAction cutAction = new QAction(tr("Cu&t"), this); cutAction->setIcon(QIcon(":/images/cut.png")); cutAction->setShortcut(QKeySequence::Cut); connect(cutAction, SIGNAL(triggered()), this, SLOT(cut())); //copyAction copyAction = new QAction(tr("&Copy"), this); copyAction->setIcon(QIcon(":/images/copy.png")); copyAction->setShortcut(QKeySequence::Copy); connect(copyAction, SIGNAL(triggered()), this, SLOT(copy())); //pasteAction pasteAction = new QAction(tr("&Paste"), this); pasteAction->setIcon(QIcon(":/images/paste.png")); pasteAction->setShortcut(QKeySequence::Paste); connect(pasteAction, SIGNAL(triggered()), this, SLOT(paste())); //closeAction closeAction = new QAction(tr("Cl&ose"), this); closeAction->setShortcut(QKeySequence::Close); connect(closeAction, SIGNAL(triggered()),mdiArea, SLOT(closeActiveSubWindow())); //closeAllAction closeAllAction = new QAction(tr("Close &All"), this); connect(closeAllAction, SIGNAL(triggered()), this, SLOT(close())); //tileAction tileAction = new QAction(tr("&Tile"), this); connect(tileAction, SIGNAL(triggered()),mdiArea, SLOT(tileSubWindows())); //cacadeAction cascadeAction = new QAction(tr("&Cascade"), this); connect(cascadeAction, SIGNAL(triggered()),mdiArea, SLOT(cascadeSubWindows())); //newAction nextAction = new QAction(tr("Ne&xt"), this); nextAction->setShortcut(QKeySequence::NextChild); connect(nextAction, SIGNAL(triggered()),mdiArea, SLOT(activateNextSubWindow())); //previousAction previousAction = new QAction(tr("Pre&vious"), this); previousAction->setShortcut(QKeySequence::PreviousChild); connect(previousAction, SIGNAL(triggered()),mdiArea, SLOT(activatePreviousSubWindow())); //separatorAction separatorAction = new QAction(this); separatorAction->setSeparator(true); //aboutAction aboutAction = new QAction(tr("&About"), this); aboutAction->setStatusTip(tr("Show the application's About box")); connect(aboutAction, SIGNAL(triggered()), this, SLOT(about())); //aboutQtAction aboutQtAction = new QAction(tr("About &Qt"), this); connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt())); windowActionGroup = new QActionGroup(this);}/** 菜单栏创建 */void MainWindow::createMenus(){ //fileMenu fileMenu = menuBar()->addMenu("&File"); fileMenu->addAction(newAction); fileMenu->addAction(openAction); fileMenu->addAction(saveAction); fileMenu->addAction(saveAsAction); fileMenu->addSeparator(); fileMenu->addAction(exitAction); //editMenu editMenu = menuBar()->addMenu(tr("&Edit")); editMenu->addAction(cutAction); editMenu->addAction(copyAction); editMenu->addAction(pasteAction); windowMenu=menuBar()->addMenu(tr("&Windos")); windowMenu->addAction(closeAction); windowMenu->addAction(closeAllAction); windowMenu->addSeparator(); windowMenu->addAction(tileAction); windowMenu->addAction(cascadeAction); windowMenu->addSeparator(); windowMenu->addAction(nextAction); windowMenu->addAction(previousAction); windowMenu->addAction(separatorAction); menuBar()->addSeparator(); helpMenu = menuBar()->addMenu(tr("&Help")); helpMenu->addAction(aboutAction); helpMenu->addAction(aboutQtAction);}/** 创建工具栏 */void MainWindow::createToolBars(){ fileToolBar = addToolBar(tr("FIle")); fileToolBar->addAction(newAction); fileToolBar->addAction(openAction); fileToolBar->addAction(saveAction); editToolBar = addToolBar(tr("Edit")); editToolBar->addAction(cutAction); editToolBar->addAction(copyAction); editToolBar->addAction(pasteAction);}/** 创建状态栏 */void MainWindow::createStatusBar(){ readyLabel = new QLabel(tr("Ready")); statusBar()->addWidget(readyLabel,1);}/** 添加Editor */void MainWindow::addEditor(Editor *editor){ connect(editor,SIGNAL(copyAvailable(bool)),cutAction,SLOT(setEnabled(bool))); connect(editor,SIGNAL(copyAvailable(bool)),copyAction,SLOT(setEnabled(bool))); QMdiSubWindow *subWindow = mdiArea->addSubWindow(editor); windowMenu->addAction(editor->windowMenuAction()); subWindow->show();}/** 激活窗口 */Editor *MainWindow::activeEditor(){ QMdiSubWindow *subWindow = mdiArea->activeSubWindow(); if(subWindow) return qobject_cast<Editor *>(subWindow->widget()); return 0;}

 

PS:完整源代码放到资源里面了，附上链接......

http://download.csdn.net/source/1458294

 

===================================================================

放假了...无聊中....