学习Qt已经 好长时间了，在通过几个模块化的学习后，想要写一些东西，学了基本控件，信号和槽，对话框，文件与目录的输入输出等。感受能够作一个简单的记事本。其实昨天上传过一次，查找和替换写的很差，由于实战经验少，一直不知道该如何对那么多控件布局，睡觉的时候忽然惊醒能够直接再写对话框窗口呀！！！瞬间清醒过来，又写了一下。基本的复制粘贴和剪切功能我的感受QTextedit控件自带的有，就没有写…web
1.文件（新建，打开，保存，另存为，打印，退出）
2.字体格式（字体大小，颜色，形式，加粗，倾斜，下划线）
3.文本格式（对齐方式）
4.编辑功能（复制，粘贴，删除，全选，查找，替换）windows
废话很少说直接上代码：
mainwindow.cppide
#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); isunderline=false; isItalic=false; isheight=false; pad = new QTextEdit; this->setCentralWidget(pad); resize(900,500); pad->setText(""); createActions();//菜单栏行为 createMenus();//文件菜单栏函数 createToolbar();//工具栏 void (finddialog::*findsignals)(QString) = &finddialog::findText; connect(&fdg,findsignals,this,&MainWindow::dealfromfind); void (replace::*replacesignals)(QString,QString) = &replace::replaceText; connect(&rdg,replacesignals,this,&MainWindow::dealfromreplace); } MainWindow::~MainWindow() { delete ui; } //-----------------建立菜单栏函数------------- void MainWindow::createMenus(){ //————文件———— file_menu = menuBar()->addMenu(tr("&文件")); file_menu->setStyleSheet("color:blue"); file_menu->addAction(new_file); file_menu->addAction(open_file); file_menu->addAction(save_file); file_menu->addAction(another_save_file); file_menu->addAction(print_file); file_menu->addSeparator();//添加分割线 file_menu->addAction(exit_file); //———编辑——— edit_menu = menuBar()->addMenu(tr("&编辑")); edit_menu->setStyleSheet("color:blue"); edit_menu->addAction(edit_font); edit_menu->addAction(edit_Wedight); edit_menu->addAction(edit_Italic); edit_menu->addAction(edit_Underline); edit_menu->addAction(edit_AlignLeft); edit_menu->addAction(edit_AlignRigeht); edit_menu->addAction(edit_AlignCenter); edit_menu->addAction(edit_color); edit_menu->addAction(edit_find); edit_menu->addAction(edit_replace); //———关于———— about_menu = menuBar()->addMenu(tr("关于")); about_menu->setStyleSheet("color:blue"); about_menu->addAction(about_help); about_menu->addAction(about_fabricator); } void MainWindow::createActions(){ //Action响应file_menu new_file = new QAction(QIcon(tr(":/new/prefix1/images/xinjian.png")),tr("&新建"),this); new_file->setShortcut(QKeySequence::New); open_file= new QAction(QIcon(tr(":/new/prefix1/images/dakaiwenjian.png")),tr("&打开"),this); open_file->setShortcut(QKeySequence::Open); save_file = new QAction(QIcon(tr(":/new/prefix1/images/baocun.png")),tr("&保存"),this); save_file->setShortcut(QKeySequence::Save); another_save_file = new QAction(QIcon(tr(":/new/prefix1/images/lingcunwei")),tr("&另存为"),this); another_save_file->setShortcut(QKeySequence::SaveAs); print_file= new QAction(QIcon(tr(":/new/prefix1/images/dayin.png")),tr("&打印"),this); print_file->setShortcut(QKeySequence::Print); exit_file = new QAction(QIcon(tr(":/new/prefix1/images/tuichu")),tr("&退出"),this); exit_file->setShortcut(QKeySequence::Quit); //——————编辑———————— edit_font = new QAction(QIcon(tr(":/new/prefix1/images/zitifont5.png")),tr("&字体"),this); edit_color = new QAction(QIcon(tr(":/new/prefix1/images/yanse.png")),tr("&颜色"),this); edit_Wedight = new QAction(QIcon(tr(":/new/prefix1/images/jiacu.png")),tr("&加粗"),this); edit_Italic = new QAction(QIcon(tr(":/new/prefix1/images/qingxie.png")),tr("&倾斜"),this); edit_Underline = new QAction(QIcon(tr(":/new/prefix1/images/Underline.png")),tr("&下划线"),this); edit_AlignLeft = new QAction(QIcon(tr(":/new/prefix1/images/zuoduiqi")),tr("&左对齐"),this); edit_AlignRigeht = new QAction(QIcon(tr(":/new/prefix1/images/youduiqi")),tr("&右对齐"),this); edit_AlignCenter = new QAction(QIcon(tr(":/new/prefix1/images/juzhong")),tr("&居中"),this); edit_find = new QAction(QIcon(tr(":/images/tuichu")),tr("&查找"),this); edit_replace = new QAction(QIcon(tr(":/images/tuichu")),tr("&替换"),this); // edit_Wedight = new QAction(); //————————关于———————— about_help = new QAction(QIcon(tr("../images/tuichu")),tr("&帮助"),this); about_fabricator = new QAction(QIcon(tr("../images/tuichu")),tr("&制做人"),this); //信号和槽 //————————文件—————— connect(new_file,SIGNAL(triggered()),this,SLOT(newFile())); connect(open_file,SIGNAL(triggered()),this,SLOT(openFile())); connect(save_file,SIGNAL(triggered()),this,SLOT(saveFile())); connect(another_save_file,SIGNAL(triggered()),this,SLOT(anotherSaveFile())); connect(print_file,SIGNAL(triggered()),this,SLOT(printFile())); connect(exit_file,SIGNAL(triggered()),this,SLOT(QuitFile())); //————编辑———————— connect(edit_font,SIGNAL(triggered()),this,SLOT(editFont())); connect(edit_Wedight,SIGNAL(triggered()),this,SLOT(editWedight())); connect(edit_Italic,SIGNAL(triggered()),this,SLOT(editItalic())); connect(edit_Underline,SIGNAL(triggered()),this,SLOT(editUnderline())); connect(edit_AlignLeft,SIGNAL(triggered()),this,SLOT(AlignLeft())); connect(edit_AlignRigeht,SIGNAL(triggered()),this,SLOT(AlignRight())); connect(edit_AlignCenter,SIGNAL(triggered()),this,SLOT(AlignCenter())); connect(edit_color,SIGNAL(triggered()),this,SLOT(editColor())); connect(edit_find,SIGNAL(triggered()),this,SLOT(editFind())); connect(edit_replace,SIGNAL(triggered()),this,SLOT(editReplace())); //——————关于—————— connect(about_help,SIGNAL(triggered()),this,SLOT(abouthelp())); connect(about_fabricator,SIGNAL(triggered()),this,SLOT(aboutfabricator())); } void MainWindow::createToolbar(){ QToolBar *tool_bar = addToolBar(tr("file")); tool_bar->addAction(new_file);// tool_bar->addAction(open_file);// tool_bar->addAction(save_file);// tool_bar->addAction(another_save_file);// tool_bar->addAction(print_file);// tool_bar->addAction(edit_Wedight);// tool_bar->addAction(edit_Italic);// tool_bar->addAction(edit_Underline);// tool_bar->addAction(edit_font);// tool_bar->addAction(edit_color);// tool_bar->addAction(edit_AlignLeft);// tool_bar->addAction(edit_AlignRigeht);// tool_bar->addAction(edit_AlignCenter);// tool_bar->addAction(exit_file);// } void MainWindow::newFile(){ if (pad->document()->isModified()) { QMessageBox::StandardButton button = QMessageBox::information(this, "还没有保存", "是否要保存?",QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel); switch(button) { case QMessageBox::Save:{ saveFile(); if (pad->document()->isModified()){ return; } } case QMessageBox::Cancel:{ return; } case QMessageBox::Discard:{ break; } } } pad->clear(); } void MainWindow::openFile(){ QString filename = QFileDialog::getOpenFileName(this,tr("文件对话框"), "D:",tr("文本文档(*txt *word *rtf)")); str=filename; if(!filename.isEmpty()){ QFile file(filename); if(!file.open(QIODevice::ReadOnly)){ QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); return; } QTextStream streamcin(&file); streamcin.setCodec("UTF-8"); pad->setText(streamcin.readAll()); file.close(); } } void MainWindow::saveFile(){ if(str.isEmpty()){ QString filename = QFileDialog::getSaveFileName(this,tr("保存文件"),QString(), tr("文本文件(*.txt) ;; C++文件(*.h *.cpp *.hpp)")); if(!filename.isEmpty()){ QFile file(filename); if(!file.open(QIODevice::WriteOnly)){ QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); return; } QTextStream streamout(&file); streamout.setCodec("UTF-8"); streamout<<pad->toPlainText(); streamout.flush(); file.close(); } } else{ QFile file(str); if(!file.open(QIODevice::WriteOnly)){ QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); return; } QTextStream streamout(&file); streamout.setCodec("UTF-8"); streamout<<pad->toPlainText(); streamout.flush(); file.close(); } } void MainWindow::anotherSaveFile() { QString filename = QFileDialog::getSaveFileName(this,tr("保存文件"),QString(), tr("文本文件(*.txt) ;; C++文件(*.h *.cpp *.hpp)")); if(!filename.isEmpty()){ QFile file(filename); if(!file.open(QIODevice::WriteOnly)){ QMessageBox::critical(this,tr("错误"),tr("不能打开文件")); return; } QTextStream streamout(&file); streamout.setCodec("UTF-8"); streamout<<pad->toPlainText(); streamout.flush(); file.close(); } } void MainWindow::printFile(){ QMessageBox::information(this,"通知","本功能暂时没法使用"); QPrinter q; //打印对话框. QPrintDialog s(&q, this); if (s.exec() == QDialog::Accepted) pad->print(&q); } void MainWindow::QuitFile(){ this->close(); } void MainWindow::editFont(){ bool ok; QFont font=QFontDialog::getFont(&ok,this); if(ok){ pad->setFont(font); } else{ QMessageBox::warning(this,tr("警告"),tr("没有选择字体"),QMessageBox::Yes); } } void MainWindow::editColor(){ QColor color = QColorDialog::getColor(Qt::red,this,tr("颜色对话框")); pad->setTextColor(color); } void MainWindow::editWedight(){//加粗 QFont boldFont; if(isheight==false){ boldFont.setBold(true); isheight=true; } else { boldFont.setBold(false); isheight=false; } pad->setFont(boldFont); } void MainWindow::editItalic(){//倾斜 if(isItalic==false){ pad->setFontItalic(true); isItalic=true; } else{ pad->setFontItalic(false); isItalic=false; } } void MainWindow::editUnderline(){//下划线 if(isunderline==false){ pad->setFontUnderline(true); isunderline=true; } else{ pad->setFontUnderline(false); isunderline=false; } } void MainWindow::AlignLeft(){//对齐方式左对齐 pad->setAlignment(Qt::AlignLeft); } void MainWindow::AlignRight(){//对齐方式右对齐 pad->setAlignment(Qt::AlignRight); } void MainWindow::AlignCenter(){//对齐方式居中对齐 pad->setAlignment(Qt::AlignCenter); } void MainWindow::editFind(){//查找按钮点后出来查找对话框 fdg.show(); } void MainWindow::dealfromfind(QString str){//收到查找对话框传来的信息开始查找 if (str.trimmed().isEmpty()) { QMessageBox::information(this, tr("警告"), tr("输入框为空")); } else { if(pad->find(str,QTextDocument::FindBackward)) { QPalette palette = pad->palette(); palette.setColor(QPalette::Highlight,palette.color(QPalette::Active,QPalette::Highlight)); pad->setPalette(palette); } else{ QMessageBox::information(this,tr("查找"),tr("没有找到该字符串")); } } } void MainWindow::editReplace(){ rdg.show(); } void MainWindow::dealfromreplace(QString findstr,QString replacestr){ if (findstr.trimmed().isEmpty()) { QMessageBox::information(this, tr("警告"), tr("输入框为空")); } else{ if(pad->find(findstr,QTextDocument::FindBackward)){ QTextCursor cursor = pad->textCursor(); cursor.insertText(replacestr); } else{ QMessageBox::information(this,tr("结果"),tr("没有内容不能替换:")+str,QMessageBox::Yes); rdg.hide(); } } } QWizardPage * MainWindow::createPage1() { QWizardPage * page = new QWizardPage; page->setTitle(tr("介绍:\n参照windows自带的记事本，能够实现文件的新建保存打印以及格式的修改\n" "制做人：王啸楠")); return page; } QWizardPage * MainWindow::createPage2() { QWizardPage * page = new QWizardPage; page->setTitle("使用方式1:加粗，倾斜，下划线等功能点击后为相反样式\n如：未加粗文字点后会加粗，加粗文字点击后会变为未加粗"); return page; } QWizardPage * MainWindow::createPage3() { QWizardPage * page = new QWizardPage; page->setTitle("使用方式2:对于查找和替换功能请保证光标在末尾处（实现的是倒叙查找和替换）"); return page; } QWizardPage * MainWindow::createPage4() { QWizardPage * page = new QWizardPage; page->setTitle("结束"); return page; } void MainWindow::abouthelp(){ int ret = QMessageBox::question(this,tr("帮助文档"), tr("请参照wps，若没有用过wps请点击no"),QMessageBox::Yes,QMessageBox::No); if(ret==QMessageBox::No){ QWizard wizard(this); wizard.setWindowTitle("帮助文档"); wizard.addPage(createPage1()); wizard.addPage(createPage2()); wizard.addPage(createPage3()); wizard.addPage(createPage4()); wizard.exec(); } } void MainWindow::aboutfabricator(){ QMessageBox::information(this,tr("制做人"),tr("王啸楠")); }
finddialog.cppsvg
#include "finddialog.h" finddialog::finddialog(QWidget *parent) : QDialog(parent) { this->setWindowTitle("查找"); resize(300,120); creatpbt(); } finddialog::~finddialog(){ } void finddialog::creatpbt(){ a = new QLabel(this); a->move(25,20); a->setText("请输入要查找的字符串："); lineedit = new QLineEdit(this); lineedit->move(25,40); find_pbt = new QPushButton(tr("查找(下一个)"),this); find_pbt->move(180,10); cancel_pbt = new QPushButton(tr("取消"),this); cancel_pbt->move(180,70); connect(find_pbt,&QPushButton::clicked,this,&finddialog::findpdt); connect(cancel_pbt,&QPushButton::clicked,this,&QDialog::close); } void finddialog::findpdt(){ findtext = lineedit->text(); //发出信号. emit findText(findtext); }
replace.cpp模块化
#include "replace.h" replace::replace(QWidget *parent) : QDialog(parent) { this->setWindowTitle("替换"); resize(300,120); creatpbt(); } replace::~replace(){ } void replace::creatpbt(){ a = new QLabel(this); a->move(25,15); a->setText("请输入被替换的字符串："); findedit = new QLineEdit(this); findedit->move(25,30); b = new QLabel(this); b->move(25,60); b->setText("请输入替换的字符串："); replaceedit = new QLineEdit(this); replaceedit->move(25,75); replace_pbt = new QPushButton(tr("替换"),this); replace_pbt->move(180,10); cancel_pbt = new QPushButton(tr("取消"),this); cancel_pbt->move(180,70); connect(replace_pbt,&QPushButton::clicked,this,&replace::replacepdt); connect(cancel_pbt,&QPushButton::clicked,this,&replace::close); } void replace::replacepdt(){ QString str1,str2; str1=findedit->text(); str2=replaceedit->text(); emit replaceText(str1,str2); }
由于这个文件还要审核后才能发出暂时没有下载连接…
你们能够私聊我。函数