30.QT IDE编写

mainwindow.h

 #ifndef MAINWINDOW_H

 #define MAINWINDOW_H

 #include <QMainWindow>

 #include <QTextEdit>

 #include <QMenu>

 #include <QMenuBar>

 #include <QAction>

 #include <QFileDialog>

 #include <QMessageBox>

 #include <iostream>

 #include <fstream>

 #include <cstdlib>

 #include <QImage>

 #include <QLabel>

 #include <QMenu>

 #include <QMenuBar>

 #include <QComboBox>

 #include <QSpinBox>

 #include <QToolBar>

 #include <QFontComboBox>

 #include <QToolButton>

 #include <QTextCharFormat>

 using namespace std;

 namespace Ui {

 class MainWindow;

 }

 class MainWindow : public QMainWindow

 {

     Q_OBJECT

 public:

     explicit MainWindow(QWidget *parent = );

     ~MainWindow();

     void createActions();

     void createMenus();

     void createToolBars();

 private:

     Ui::MainWindow *ui;

     QString filename;

     //文本编辑

     QTextEdit *text;

     //菜单

     QMenu *file;

         //菜单选项

         QAction *Afile_open;

         QAction *Afile_close;

         QAction *Afile_save;

         QAction *Afile_exit;

     QMenu *edit;

         QAction *Afile_selall;

         QAction *Afile_cut;

         QAction *Afile_copy;

         QAction *Afile_paste;

     QMenu *build;

         QAction *Abuild_it;

         QAction *Abuild_andrun;

     QMenu *about;

         QAction *Aabout_it;

 private:

         QMenu *fileMenu;                                   //各项菜单栏

             QMenu *zoomMenu;

             QMenu *rotateMenu;

             QMenu *mirrorMenu;

             QImage img;

             QString fileName;

             //编辑显示窗口

            // ShowWidget *showWidget;

             QAction *openFileAction;                         //文件菜单项

             QAction *NewFileAction;

             QAction *PrintTextAction;

             QAction *PrintImageAction;

             QAction *exitAction;

             QAction *copyAction;                              //编辑菜单项

             QAction *cutAction;

             QAction *pasteAction;

             QAction *aboutAction;

             QAction *zoomInAction;

             QAction *zoomOutAction;

             QAction *rotate90Action;                         //旋转菜单项

             QAction *rotate180Action;

             QAction *rotate270Action;

             QAction *mirrorVerticalAction;                  //镜像菜单项

             QAction *mirrorHorizontalAction;

             QAction *undoAction;

             QAction *redoAction;

             QToolBar *fileTool;                              //工具栏

             QToolBar *zoomTool;

             QToolBar *rotateTool;

             QToolBar *mirrorTool;

             QToolBar *doToolBar;

             QLabel *fontLabel1;                             //字体设置项

             QFontComboBox *fontComboBox;

             QLabel *fontLabel2;

             QComboBox *sizeComboBox;

             QToolButton *boldBtn;

             QToolButton *italicBtn;

             QToolButton *underlineBtn;

             QToolButton *colorBtn;

             QToolBar *fontToolBar;                          //字体工具栏

             QLabel *listLabel;                              //排序设置项

             QComboBox *listComboBox;

             QActionGroup *actGrp;

             QAction *leftAction;

             QAction *rightAction;

             QAction *centerAction;

             QAction *justifyAction;

             QToolBar *listToolBar;                          //排序工具栏

 private slots:

     void file_open();

     void file_close();

     void file_save();

     void file_exit();

     void file_selall();

     void file_cut();

     void file_copy();

     void file_paste();

     void build_it();

     void build_andrun();

     void about_it();

 };

 #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);

     //设置文本编辑器

     text = new QTextEdit;

     QFont font;

     font.setPixelSize();

     text->setFont(font);

     QColor qcolor;

     qcolor.setRgb(,,);

     this->setCentralWidget(text);

     //设置菜单

     file = this->menuBar()->addMenu("文件");

     edit = this->menuBar()->addMenu("编辑");

     build = this->menuBar()->addMenu("构建");

     about = this->menuBar()->addMenu("关于");

     //about菜单

     {

         Aabout_it = new QAction("关于",this);

         about->addAction(Aabout_it);

         connect(Aabout_it,SIGNAL(triggered(bool)),this,SLOT(about_it()));

     }

     //open菜单

     {

         Afile_open = new QAction("打开文件",this);

         file->addAction(Afile_open);

         connect(Afile_open,SIGNAL(triggered(bool)),this,SLOT(file_open()));

         Afile_close = new QAction("关闭文件",this);

         file->addAction(Afile_close);

         connect(Afile_close,SIGNAL(triggered(bool)),this,SLOT(file_close()));

         Afile_save = new QAction("保存文件",this);

         file->addAction(Afile_save);

         connect( Afile_save,SIGNAL(triggered(bool)),this,SLOT(file_save()));

         Afile_exit = new QAction("退出",this);

         file->addAction(Afile_exit);

         connect(Afile_exit,SIGNAL(triggered(bool)),this,SLOT(file_exit()));

     }

     //编辑菜单

     {

         Afile_selall = new QAction("全选",this);

         edit->addAction(Afile_selall);

         connect(Afile_selall,SIGNAL(triggered(bool)),this,SLOT(file_selall()));

         Afile_cut = new QAction("剪切",this);

         edit->addAction(Afile_cut);

         connect(Afile_cut,SIGNAL(triggered(bool)),this,SLOT(file_cut()));

         Afile_copy = new QAction("复制",this);

         edit->addAction(Afile_copy);

         connect(Afile_copy,SIGNAL(triggered(bool)),this,SLOT(file_copy()));

         Afile_paste = new QAction("粘贴",this);

         edit->addAction(Afile_paste);

         connect(Afile_paste,SIGNAL(triggered(bool)),this,SLOT(file_paste()));

     }

     {

         Abuild_it = new QAction("编译",this);

         build->addAction(Abuild_it);

         connect(Abuild_it,SIGNAL(triggered(bool)),this,SLOT(build_it()));

         Abuild_andrun = new QAction("编译执行",this);

         build->addAction(Abuild_andrun);

         connect(Abuild_andrun,SIGNAL(triggered(bool)),this,SLOT(build_andrun()));

     }

     this->setWindowTitle("简易编译器");

     //showWidget =new ShowWidget(this);

      //   setCentralWidget(showWidget);

         //在工具栏上嵌入控件

         //设置字体

         fontLabel1 =new QLabel(tr("字体:"));

         fontComboBox =new QFontComboBox;

         fontComboBox->setFontFilters(QFontComboBox::ScalableFonts);

         fontLabel2 =new QLabel(tr("字号:"));

         sizeComboBox =new QComboBox;

         QFontDatabase db;

         foreach(int size,db.standardSizes())

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

         boldBtn =new QToolButton;

         boldBtn->setIcon(QIcon("bold.png"));

         boldBtn->setCheckable(true);

         italicBtn =new QToolButton;

         italicBtn->setIcon(QIcon("italic.png"));

         italicBtn->setCheckable(true);

         underlineBtn =new QToolButton;

         underlineBtn->setIcon(QIcon("underline.png"));

         underlineBtn->setCheckable(true);

         colorBtn =new QToolButton;

         colorBtn->setIcon(QIcon("color.png"));

         colorBtn->setCheckable(true);

         //排序

         listLabel =new QLabel(tr("排序"));

         listComboBox =new QComboBox;

         listComboBox->addItem("Standard");

         listComboBox->addItem("QTextListFormat::ListDisc");

         listComboBox->addItem("QTextListFormat::ListCircle");

         listComboBox->addItem("QTextListFormat::ListSquare");

         listComboBox->addItem("QTextListFormat::ListDecimal");

         listComboBox->addItem("QTextListFormat::ListLowerAlpha");

         listComboBox->addItem("QTextListFormat::ListUpperAlpha");

         listComboBox->addItem("QTextListFormat::ListLowerRoman");

         listComboBox->addItem("QTextListFormat::ListUpperRoman");

         createActions();

         createMenus();

         createToolBars();

         if(img.load("image.png"))

         {

             //showWidget->imageLabel->setPixmap(QPixmap::fromImage(img));

         }

 }

 MainWindow::~MainWindow()

 {

     delete ui;

 }

 void MainWindow::file_open()

 {

     filename =QFileDialog::getOpenFileName(this,"hello","*.*");

     if(filename.isEmpty())

     {

         QMessageBox::information(this,"提示","注意选择一个文件");

         return;

     }

     fstream fin(filename.toStdString().c_str());

     if(!fin)

     {

         QMessageBox::information(this,"提示","打开文件失败");

         return;

     }

     while(!fin.eof())

     {

         char buf[]={};

         fin.getline(buf,);

         text->append(buf);

     }

     fin.close();

 }

 void MainWindow::file_close()

 {

     text->setText("");

     filename ="";

 }

 void MainWindow::file_save()

 {

     filename = QFileDialog::getSaveFileName();

     if(filename.isEmpty())

     {

         QMessageBox::information(this,"提示","打开文件失败");

         return;

     }

     QString info =text->toPlainText().toStdString().c_str();

     //写入

     ofstream fout(filename.toStdString().c_str());

     if(!fout)

     {

         QMessageBox::information(this,"提示","打开文件失败");

         return;

     }

     fout.write(info.toStdString().c_str(),strlen(info.toStdString().c_str()));

     fout.close();

 }

 void MainWindow::file_exit()

 {

     exit();

 }

 void MainWindow::file_selall()

 {

     text->selectAll();

 }

 void MainWindow::file_cut()

 {

     text->cut();

 }

 void MainWindow::file_copy()

 {

     text->copy();

 }

 void MainWindow::file_paste()

 {

     text->paste();

 }

 void MainWindow::build_it()

 {

     QString destexename = filename;

     bool iscpp = destexename.contains(".cpp");

     QString cmd;

     if(iscpp)

     {

         destexename.replace(".cpp",".exe");

         cmd = "g++ -o " + destexename+" " +filename;

     }

     else

     {

         destexename.replace(".c",".exe");

         cmd = "gcc -o "+destexename+" "+filename;

     }

     system(cmd.toStdString().c_str());

 }

 void MainWindow::build_andrun()

 {

     QString destexename = filename;

     bool iscpp = destexename.contains(".cpp");

     QString cmd;

     if(iscpp)

     {

         destexename.replace(".cpp",".exe");

         cmd = "g++ -o "+filename+" "+destexename;

     }

     else

     {

         destexename.replace(".c",".exe");

         cmd = "gcc -o "+filename+" "+destexename;

     }

     system(cmd.toStdString().c_str());

     system(destexename.toStdString().c_str());

 }

 void MainWindow::about_it()

 {

     QMessageBox::information(this,"hello","版权所有,盗版不究");

 }

 void MainWindow::createActions()

 {

     //"打开"动作

     openFileAction =new QAction(QIcon("open.png"),tr("打开"),this);

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

     openFileAction->setStatusTip(tr("打开一个文件"));

    // connect(openFileAction,SIGNAL(triggered()),this,SLOT(ShowOpenFile()));

     //"新建"动作

     NewFileAction =new QAction(QIcon("new.png"),tr("新建"),this);

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

     NewFileAction->setStatusTip(tr("新建一个文件"));

     //connect(NewFileAction,SIGNAL(triggered()),this,SLOT(ShowNewFile()));

     //"退出"动作

     exitAction =new QAction(tr("退出"),this);

     exitAction->setShortcut(tr("Ctrl+Q"));

     exitAction->setStatusTip(tr("退出程序"));

     //connect(exitAction,SIGNAL(triggered()),this,SLOT(close()));

     //"复制"动作

     copyAction =new QAction(QIcon("copy.png"),tr("复制"),this);

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

     copyAction->setStatusTip(tr("复制文件"));

    // connect(copyAction,SIGNAL(triggered()),showWidget->text,SLOT(copy()));

     //"剪切"动作

     cutAction =new QAction(QIcon("cut.png"),tr("剪切"),this);

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

     cutAction->setStatusTip(tr("剪切文件"));

     //connect(cutAction,SIGNAL(triggered()),showWidget->text,SLOT(cut()));

     //"粘贴"动作

     pasteAction =new QAction(QIcon("paste.png"),tr("粘贴"),this);

     pasteAction->setShortcut(tr("Ctrl+V"));

     pasteAction->setStatusTip(tr("粘贴文件"));

   //  connect(pasteAction,SIGNAL(triggered()),showWidget->text,SLOT(paste()));

     //"关于"动作

     aboutAction =new QAction(tr("关于"),this);

    // connect(aboutAction,SIGNAL(triggered()),this,SLOT(QApplication::aboutQt()));

     //"打印文本"动作

     PrintTextAction =new QAction(QIcon("printText.png"),tr("打印文本"), this);

     PrintTextAction->setStatusTip(tr("打印一个文本"));

    // connect(PrintTextAction,SIGNAL(triggered()),this,SLOT(ShowPrintText()));

     //"打印图像"动作

     PrintImageAction =new QAction(QIcon("printImage.png"),tr("打印图像"), this);

     PrintImageAction->setStatusTip(tr("打印一幅图像"));

   //  connect(PrintImageAction,SIGNAL(triggered()),this,SLOT(ShowPrintImage()));

     //"放大"动作

     zoomInAction =new QAction(QIcon("zoomin.png"),tr("放大"),this);

     zoomInAction->setStatusTip(tr("放大一张图片"));

    // connect(zoomInAction,SIGNAL(triggered()),this,SLOT(ShowZoomIn()));

     //"缩小"动作

     zoomOutAction =new QAction(QIcon("zoomout.png"),tr("缩小"),this);

     zoomOutAction->setStatusTip(tr("缩小一张图片"));

    // connect(zoomOutAction,SIGNAL(triggered()),this,SLOT(ShowZoomOut()));

     //实现图像旋转的动作（Action）

     //旋转90°

     rotate90Action =new QAction(QIcon("rotate90.png"),tr("旋转90°"),this);

     rotate90Action->setStatusTip(tr("将一幅图旋转90°"));

    // connect(rotate90Action,SIGNAL(triggered()),this,SLOT(ShowRotate90()));

     //旋转180°

     rotate180Action =new QAction(QIcon("rotate180.png"),tr("旋转180°"), this);

     rotate180Action->setStatusTip(tr("将一幅图旋转180°"));

     connect(rotate180Action,SIGNAL(triggered()),this,SLOT(ShowRotate180()));

     //旋转270°

     rotate270Action =new QAction(QIcon("rotate270.png"),tr("旋转270°"), this);

     rotate270Action->setStatusTip(tr("将一幅图旋转270°"));

    // connect(rotate270Action,SIGNAL(triggered()),this,SLOT(ShowRotate270()));

     //实现图像镜像的动作（Action）

     //纵向镜像

     mirrorVerticalAction =new QAction(tr ("纵向镜像"),this);

     mirrorVerticalAction->setStatusTip(tr("对一张图作纵向镜像"));

    // connect(mirrorVerticalAction,SIGNAL(triggered()),this,SLOT(ShowMirrorVertical()));

     //横向镜像

     mirrorHorizontalAction =new QAction(tr("横向镜像"),this);

     mirrorHorizontalAction->setStatusTip(tr("对一张图作横向镜像"));

     //connect(mirrorHorizontalAction,SIGNAL(triggered()),this,SLOT(ShowMirrorHorizontal()));

     //排序:左对齐、右对齐、居中和两端对齐

     actGrp =new QActionGroup(this);

     leftAction =new QAction(QIcon("left.png"),"左对齐",actGrp);

     leftAction->setCheckable(true);

     rightAction =new QAction(QIcon("right.png"),"右对齐",actGrp);

     rightAction->setCheckable(true);

     centerAction =new QAction(QIcon("center.png"),"居中",actGrp);

     centerAction->setCheckable(true);

     justifyAction =new QAction(QIcon("justify.png"),"两端对齐",actGrp);

     justifyAction->setCheckable(true);

    // connect(actGrp,SIGNAL(triggered(QAction*)),this,SLOT(ShowAlignment(QAction*)));

     //实现撤销和重做的动作（Action）

     //撤销和重做

     undoAction =new QAction(QIcon("undo.png"),"撤销",this);

    // connect(undoAction,SIGNAL(triggered()),showWidget->text,SLOT(undo()));

     redoAction =new QAction(QIcon("redo.png"),"重做",this);

     //connect(redoAction,SIGNAL(triggered()),showWidget->text,SLOT(redo()));

 }

 void MainWindow::createMenus()

 {

     //文件菜单

     fileMenu =menuBar()->addMenu(tr("文件"));

     fileMenu->addAction(openFileAction);

     fileMenu->addAction(NewFileAction);

     fileMenu->addAction(PrintTextAction);

     fileMenu->addAction(PrintImageAction);

     fileMenu->addSeparator();

     fileMenu->addAction(exitAction);

     //缩放菜单

     zoomMenu =menuBar()->addMenu(tr("编辑"));

     zoomMenu->addAction(copyAction);

     zoomMenu->addAction(cutAction);

     zoomMenu->addAction(pasteAction);

     zoomMenu->addAction(aboutAction);

     zoomMenu->addSeparator();

     zoomMenu->addAction(zoomInAction);

     zoomMenu->addAction(zoomOutAction);

     //旋转菜单

     rotateMenu =menuBar()->addMenu(tr("旋转"));

     rotateMenu->addAction(rotate90Action);

     rotateMenu->addAction(rotate180Action);

     rotateMenu->addAction(rotate270Action);

     //镜像菜单

     mirrorMenu =menuBar()->addMenu(tr("镜像"));

     mirrorMenu->addAction(mirrorVerticalAction);

     mirrorMenu->addAction(mirrorHorizontalAction);

 }

 void MainWindow::createToolBars()

 {

     //文件工具条

     fileTool =addToolBar("File");

     fileTool->addAction(openFileAction);

     fileTool->addAction(NewFileAction);

     fileTool->addAction(PrintTextAction);

     fileTool->addAction(PrintImageAction);

     //编辑工具条

     zoomTool =addToolBar("Edit");

     zoomTool->addAction(copyAction);

     zoomTool->addAction(cutAction);

     zoomTool->addAction(pasteAction);

     zoomTool->addSeparator();

     zoomTool->addAction(zoomInAction);

     zoomTool->addAction(zoomOutAction);

     //旋转工具条

     rotateTool =addToolBar("rotate");

     rotateTool->addAction(rotate90Action);

     rotateTool->addAction(rotate180Action);

     rotateTool->addAction(rotate270Action);

     //撤销和重做工具条

     doToolBar =addToolBar("doEdit");

     doToolBar->addAction(undoAction);

     doToolBar->addAction(redoAction);

     //字体工具条

     fontToolBar =addToolBar("Font");

     fontToolBar->addWidget(fontLabel1);

     fontToolBar->addWidget(fontComboBox);

     fontToolBar->addWidget(fontLabel2);

     fontToolBar->addWidget(sizeComboBox);

     fontToolBar->addSeparator();

     fontToolBar->addWidget(boldBtn);

     fontToolBar->addWidget(italicBtn);

     fontToolBar->addWidget(underlineBtn);

     fontToolBar->addSeparator();

     fontToolBar->addWidget(colorBtn);

     //排序工具条

     listToolBar =addToolBar("list");

     listToolBar->addWidget(listLabel);

     listToolBar->addWidget(listComboBox);

     listToolBar->addSeparator();

     listToolBar->addActions(actGrp->actions());

 }

main.cpp

 #include "mainwindow.h"

 #include <QApplication>

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

 {

     QApplication a(argc, argv);

     MainWindow w;

     w.show();

     w.resize(,);

     return a.exec();

 }

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