Qt5主窗体：文本编辑器

#include "mainwindow.h" #include "showwidget.h" #include <QApplication> #include <QToolBar> #include <QFileDialog> #include <QTextStream> #include <QtPrintSupport/QPrinter> #include <QtPrintSupport/QPrintDialog> #include <QPainter> #include <QRect> #include <QSize> #include <QGraphicsItem> #include <QColorDialog> #include <QColor> #include <QAction> #include <QTextList> #include <QTextBlockFormat> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { setWindowTitle(tr("Easy Word")); showWidget = new ShowWidget(this); setCentralWidget(showWidget); 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); //文字排版功能 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)); } //各字体设置相关功能的信号与槽 connect(fontComboBox,SIGNAL(activated(QString)),this,SLOT(showFontComboBox(QString))); connect(sizeComboBox,SIGNAL(activated(QString)),this,SLOT(showSizeSpinBix(QString))); connect(boldBtn,SIGNAL(clicked(bool)),this,SLOT(showBoldBtn())); connect(italicBtn,SIGNAL(clicked(bool)),this,SLOT(showItalicBtn())); connect(underlineBtn,SIGNAL(clicked(bool)),this,SLOT(showUnderlineBtn())); connect(colorBtn,SIGNAL(clicked(bool)),this,SLOT(showColorBtn())); connect(showWidget->text,SIGNAL(currentCharFormatChanged(QTextCharFormat &)),this,SLOT(showCurrentFormatChanged(QTextCharFormat &))); // //文字排版功能的信号与槽 // connect(listComboBox,SIGNAL(activated(int)),this,SLOT(showList(int))); // connect(showWidget->text->document(),SIGNAL(undoAvailable(bool)),redoAction,SLOT(setEnabled(bool))); // connect(showWidget->text->document(),SIGNAL(redoAvailable(bool)),redoAction,SLOT(setEnabled(bool))); // connect(showWidget->text,SIGNAL(cursorPositionChanged()),this,SLOT(showCursorPositionChanged())); connect(listComboBox,SIGNAL(activated(int)),this,SLOT(showList(int))); connect(showWidget->text->document(),SIGNAL(undoAvailable(bool)),redoAction,SLOT(setEnabled(bool))); connect(showWidget->text->document(),SIGNAL(redoAvailable(bool)),redoAction,SLOT(setEnabled(bool))); connect(showWidget->text,SIGNAL(cursorPositionChanged()),this,SLOT(showCursorPositionChanged())); } 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(bool)),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(bool)),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(bool)),showWidget->text,SLOT(copy())); //剪切操作 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(bool)),showWidget->text,SLOT(cut())); //粘贴操作 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(bool)),showWidget->text,SLOT(paste())); //“关于”操作 aboutAction = new QAction(tr("关于") ,this); connect(aboutAction, SIGNAL(triggered(bool)),this, SLOT(Qapplication::aboutQt())); //打印文本 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(bool)),this,SLOT(showPrintText())); //打印图片 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(bool)),this,SLOT(showPrintImage())); //放大图片 zoomInAction = new QAction(QIcon("zoomin.png") , tr("放大") ,this); zoomInAction->setStatusTip(tr("放大一张图片")); connect(zoomInAction,SIGNAL(triggered(bool)),this,SLOT(showZoomIn())); //缩小图片 zoomOutAction = new QAction(QIcon("zoomout.png") ,tr("缩小") ,this); zoomOutAction->setStatusTip(tr("缩小一张图片")); connect(zoomOutAction,SIGNAL(triggered(bool)),this,SLOT(showZoomOut())); //旋转图片 rotate90Action = new QAction(QIcon("rotate90.png") , tr("旋转90") ,this); rotate90Action->setStatusTip(tr("将一幅图旋转90度")); connect(rotate90Action,SIGNAL(triggered(bool)),this,SLOT(showRotate90())); rotate180Action = new QAction(QIcon("rotate180.png") ,tr("旋转180") ,this); rotate180Action->setStatusTip(tr("将一幅图片旋转180度")); connect(rotate180Action,SIGNAL(triggered(bool)),this,SLOT(showRotate180())); rotate270Action = new QAction(QIcon("rotate270.png"), tr("旋转270") ,this); rotate270Action->setStatusTip(tr("将一幅图片旋转270度")); connect(rotate270Action,SIGNAL(triggered(bool)),this,SLOT(showRotate270())); //垂直镜像 mirrorVerticalAction = new QAction(QIcon("mirrorVertical.png") , tr("纵向镜像") ,this); mirrorVerticalAction->setStatusTip(tr("对一张图片做纵向镜像")); connect(mirrorVerticalAction,SIGNAL(triggered(bool)),this,SLOT(showMirrorVertical())); //水平镜像 mirrorHorizontalAction = new QAction(QIcon("mirrorHorizontal.png") ,tr("横向镜像") ,this); mirrorHorizontalAction->setStatusTip(tr("对一张图