Qt实现notepad记事本源码工程(版本四）

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QTextEdit> #include <QDebug> #include <QFileDialog> #include <QFile> #include <QTextStream> #include <QMessageBox> #include <QSignalMapper> #include <QLabel> #include <QFont> #include <QFontDialog> #include <QColorDialog> #include <QPlainTextEdit> #include <QTextEdit> #include <QDateTime> #include <QLabel> #include <QDesktopServices> #include <QUrl> #include <QPrintDialog> #include <QPrinter> #include <QPageSetupDialog> #include "myabout.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); this->setWindowTitle(tr("无标题 - 测试记事本[*]")); connect(ui->action_New, SIGNAL(triggered()), this, SLOT(NewCreate()));//新建文件 connect(ui->action_Open, SIGNAL(triggered()), this, SLOT(OpenFile()));//打开文件 connect(ui->action_Save, SIGNAL(triggered()), this, SLOT(SaveFile()));//保存文件 connect(ui->action_SaveAs, SIGNAL(triggered()), this, SLOT(SaveAsFile()));//另存文件 connect(ui->action_Close, SIGNAL(triggered()), this, SLOT(close()));//关闭 connect(ui->action_Font,SIGNAL(triggered(bool)),this,SLOT(SetFont()));//设置字体 connect(ui->action_Color, SIGNAL(triggered(bool)),this, SLOT(SetClolor()));//设置颜色 connect(ui->action_Time, SIGNAL(triggered(bool)), this, SLOT(GetCurrentTime()));//获取当前时间日期 connect(ui->action_Print,SIGNAL(triggered(bool)), this, SLOT(Printer()));//打印机 connect(ui->action_PageSet, SIGNAL(triggered(bool)), this, SLOT(PageSet()));//页面设置 connect(ui->textEdit->document(), &QTextDocument::contentsChanged,this, &MainWindow::documentWasModified); //Edit Option connect(ui->action_Uodo, SIGNAL(triggered(bool)), ui->textEdit->document(), SLOT(undo()));//撤销 connect(ui->action_Cut, SIGNAL(triggered(bool)), ui->textEdit, SLOT(cut()));//剪贴 connect(ui->action_Copy, SIGNAL(triggered(bool)), ui->textEdit, SLOT(copy()));//复制 connect(ui->action_Paste, SIGNAL(triggered(bool)), ui->textEdit, SLOT(paste()));//粘贴 connect(ui->action_SelectAll, SIGNAL(triggered(bool)), ui->textEdit, SLOT(selectAll()));//全选 connect(ui->action_About, SIGNAL(triggered(bool)), this, SLOT(showAbout()));//“关于记事本”子对话框 connect(ui->action_VisitWeb,SIGNAL(triggered(bool)), this, SLOT(VisitMyWeb()));//访问我的主页 //查看Option connect(ui->action_Enlarge, SIGNAL(triggered(bool)), this, SLOT(FontSizeEnlarge()));//放大字体 connect(ui->action_Reduce, SIGNAL(triggered(bool)), this, SLOT(FontSizeReduce()));//缩小字体 connect(ui->action_Default, SIGNAL(triggered(bool)), this, SLOT(FontRestoreDefault()));//恢复默认 connect(ui->action_State, SIGNAL(triggered(bool)), this, SLOT(statusBar_Slot()));//状态栏 //一开始为选中文字时，标签不可用，只有当选中文字的时候才可用 ui->action_Cut->setEnabled(false); ui->action_Copy->setEnabled(false); ui->action_delete->setEnabled(false); //当text被选中时，发出copyAvailable信号 connect(ui->textEdit, SIGNAL(copyAvailable(bool)), ui->action_Cut, SLOT(setEnabled(bool))); connect(ui->textEdit, SIGNAL(copyAvailable(bool)), ui->action_Copy, SLOT(setEnabled(bool))); connect(ui->textEdit, SIGNAL(copyAvailable(bool)), ui->action_delete, SLOT(setEnabled(bool))); //添加状态栏,临时消息显示2秒 //ui->statusBar->showMessage(tr("欢迎使用康晓勇的记事本@@"),2); statusLabel = new QLabel; statusLabel->setText(tr("欢迎使用康晓勇的记事本@@")); //statusLabel->setMinimumSize(150, 20); // 设置标签最小大小 //statusLabel->setFrameShape(QFrame::WinPanel); // 设置标签形状 //statusLabel->setFrameShadow(QFrame::Sunken); // 设置标签阴影 //ui->statusBar->addWidget(statusLabel);//显示左边 ui->statusBar->addPermanentWidget(statusLabel);//显示右边 //修改程序左上角图标 this->setWindowIcon(QIcon(":/images/images/notepad.png")); //打印机对象 printer = new QPrinter; //字体对象 font = new QFont; fontSize = 12;//字体大小 //一开始"查看"菜单中的”状态栏“处于选中状态 ui->action_State->setCheckable(true); ui->action_State->setChecked(true); } MainWindow::~MainWindow() { delete ui; } void MainWindow::documentWasModified() { setWindowModified(ui->textEdit->document()->isModified()); } void MainWindow::VisitMyWeb() { QUrl url("https://blog.csdn.net/kxykkk"); QDesktopServices::openUrl(url); } //关于记事本 void MainWindow::About() { QString str = tr("这是一个记事本测试程序\n所有权：康晓勇\n时间：2018.12\n代码路径：https://me.csdn.net/download/kxykkk"); QMessageBox::about(this,tr("关于\"记事本\""),str); } //获取系统时间 void MainWindow::GetCurrentTime() { QDateTime currentData = QDateTime::currentDateTime(); ui->textEdit->insertPlainText(currentData.toString("yyyy-MM-dd hh:mm")); } //新建文档 void MainWindow::NewCreate() { bool isModified = ui->textEdit->document()->isModified();//当前文档已经改变 if(isModified) { if(fileName.isEmpty()) { switch (MyMessageBox(tr("是否将更改保存到 无标题？"),tr("记事本"))) { case QMessageBox::Save: SaveAsFile(); break; case QMessageBox::Discard: break; case QMessageBox::Cancel: return; default: break; } } else { SaveFile(); } } ui->textEdit->clear(); fileName.clear(); this->setWindowTitle(tr("无标题 - 测试记事本[*]")); setWindowModified(false);//窗口不显示被更改标志 } //打开文档 void MainWindow::OpenFile() { if(ui->textEdit->document()->isModified())//如果已经被修改过了，应该先保存再打开 { QString text(tr("是否将更改保存到 ")); text += fileName.isEmpty()?(tr("无标题？")):fileName; switch (MyMessageBox(text,tr(("记事本")))) { case QMessageBox::Save: SaveFile(); break; case QMessageBox::Discard: break; case QMessageBox::Cancel: return; default: break; } } QString openfileName = QFileDialog::getOpenFileName(this, tr("Open File"), QDir::currentPath(), tr("Images (*.png *.xpm *.jpg *.*)")); if(openfileName.isEmpty()) return; QFile file; file.setFileName(openfileName);//设置文件名称 bool ok = file.open(QIODevice::ReadOnly); if(ok) { QTextStream in(&file); ui->textEdit->setText(in.readAll()); file.close(); fileName = openfileName; ui->textEdit->document()->setModified(false);//文档没有别修改过 setWindowModified(false);//窗口不显示被更改标志 QFileInfo fi = QFileInfo(fileName); this->setWindowTitle(fi.fileName()+"[*]"); } else { QMessageBox::information(this, tr("错误提示"), tr("打开文件错误")+file.errorString(), QMessageBox::Abort); return ; } } void MainWindow::WriteFile(QString filepath) { if(ui->textEdit->document()->isModified()) { QFile file; file.setFileName(filepath);//设置文件名称 bool ok = file.open