QT5开发及实例（源码）.zip

#include "myword.h" #include <QtWidgets> #include "mychild.h" const QString rsrcPath = ":/images"; MyWord::MyWord(QWidget *parent) : QMainWindow(parent) { mdiArea = new QMdiArea; mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded); mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded); setCentralWidget(mdiArea); connect(mdiArea, SIGNAL(subWindowActivated(QMdiSubWindow*)),this, SLOT(updateMenus())); windowMapper = new QSignalMapper(this); connect(windowMapper, SIGNAL(mapped(QWidget*)),this, SLOT(setActiveSubWindow(QWidget*))); createActions(); createMenus(); createToolBars(); createStatusBar(); updateMenus(); move(200,150); resize(800,500); setWindowTitle(tr("Myself Word")); setUnifiedTitleAndToolBarOnMac(true); } MyWord::~MyWord() { } void MyWord::closeEvent(QCloseEvent *event) { mdiArea->closeAllSubWindows(); if (mdiArea->currentSubWindow()) { event->ignore(); } else { event->accept(); } } void MyWord::updateMenus() { //至少有一个子文档打开着的情况 bool hasMyChild = (activeMyChild()!=0); saveAct->setEnabled(hasMyChild); saveAsAct->setEnabled(hasMyChild); printAct->setEnabled(hasMyChild); printPreviewAct->setEnabled(hasMyChild); pasteAct->setEnabled(hasMyChild); closeAct->setEnabled(hasMyChild); closeAllAct->setEnabled(hasMyChild); tileAct->setEnabled(hasMyChild); cascadeAct->setEnabled(hasMyChild); nextAct->setEnabled(hasMyChild); previousAct->setEnabled(hasMyChild); separatorAct->setVisible(hasMyChild); //文档打开着并且其中有内容被选中的情况 bool hasSelection = (activeMyChild() && activeMyChild()->textCursor().hasSelection()); cutAct->setEnabled(hasSelection); copyAct->setEnabled(hasSelection); boldAct->setEnabled(hasSelection); italicAct->setEnabled(hasSelection); underlineAct->setEnabled(hasSelection); leftAlignAct->setEnabled(hasSelection); centerAct->setEnabled(hasSelection); rightAlignAct->setEnabled(hasSelection); justifyAct->setEnabled(hasSelection); colorAct->setEnabled(hasSelection); } void MyWord::updateWindowMenu() { windowMenu->clear(); windowMenu->addAction(closeAct); windowMenu->addAction(closeAllAct); windowMenu->addSeparator(); windowMenu->addAction(tileAct); windowMenu->addAction(cascadeAct); windowMenu->addSeparator(); windowMenu->addAction(nextAct); windowMenu->addAction(previousAct); windowMenu->addAction(separatorAct); QList<QMdiSubWindow *> windows = mdiArea->subWindowList(); separatorAct->setVisible(!windows.isEmpty()); //显示当前打开着的文档子窗口项 for (int i = 0; i < windows.size(); ++i) { MyChild *child = qobject_cast<MyChild *>(windows.at(i)->widget()); QString text; if (i < 9) { text = tr("&%1 %2").arg(i + 1).arg(child->userFriendlyCurrentFile()); } else { text = tr("%1 %2").arg(i + 1).arg(child->userFriendlyCurrentFile()); } QAction *action = windowMenu->addAction(text); action->setCheckable(true); action ->setChecked(child == activeMyChild()); connect(action, SIGNAL(triggered()), windowMapper, SLOT(map())); windowMapper->setMapping(action, windows.at(i)); } enabledText(); //使得字体设置菜单可用 } MyChild *MyWord::createMyChild() { MyChild *child = new MyChild; mdiArea->addSubWindow(child); connect(child, SIGNAL(copyAvailable(bool)),cutAct, SLOT(setEnabled(bool))); connect(child, SIGNAL(copyAvailable(bool)),copyAct, SLOT(setEnabled(bool))); return child; } void MyWord::createActions() { /*【文件】菜单动作集*/ newAct = new QAction(QIcon(rsrcPath + "/filenew.png"), tr("新建(&N)"), this); newAct->setShortcuts(QKeySequence::New); newAct->setToolTip("新建"); //设置工具栏按钮的提示文本 newAct->setStatusTip(tr("创建一个新文档")); //设置状态栏提示文本 connect(newAct, SIGNAL(triggered()), this, SLOT(fileNew())); openAct = new QAction(QIcon(rsrcPath + "/fileopen.png"), tr("打开(&O)..."), this); openAct->setShortcuts(QKeySequence::Open); openAct->setToolTip("打开"); openAct->setStatusTip(tr("打开已存在的文档")); connect(openAct, SIGNAL(triggered()), this, SLOT(fileOpen())); saveAct = new QAction(QIcon(rsrcPath + "/filesave.png"), tr("保存(&S)"), this); saveAct->setShortcuts(QKeySequence::Save); saveAct->setToolTip("保存"); saveAct->setStatusTip(tr("将当前文档存盘")); connect(saveAct, SIGNAL(triggered()), this, SLOT(fileSave())); saveAsAct = new QAction(tr("另存为(&A)..."), this); saveAsAct->setShortcuts(QKeySequence::SaveAs); saveAsAct->setStatusTip(tr("以一个新名字保存文档")); connect(saveAsAct, SIGNAL(triggered()), this, SLOT(fileSaveAs())); printAct = new QAction(QIcon(rsrcPath + "/fileprint.png"), tr("打印(&P)..."), this); printAct->setShortcuts(QKeySequence::Print); printAct->setToolTip("打印"); printAct->setStatusTip(tr("打印文档")); connect(printAct, SIGNAL(triggered()), this, SLOT(filePrint())); printPreviewAct = new QAction(tr("打印预览..."), this); printPreviewAct->setStatusTip(tr("预览打印效果")); connect(printPreviewAct, SIGNAL(triggered()), this, SLOT(filePrintPreview())); exitAct = new QAction(tr("退出(&X)"), this); exitAct->setShortcuts(QKeySequence::Quit); exitAct->setStatusTip(tr("退出应用程序")); connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows())); //不用自己实现 /*【编辑】菜单动作集*/ undoAct = new QAction(QIcon(rsrcPath + "/editundo.png"),tr("撤销(&U)"), this); undoAct->setShortcut(QKeySequence::Undo); undoAct->setToolTip("撤销"); undoAct->setStatusTip(tr("撤销当前操作")); connect(undoAct, SIGNAL(triggered()), this, SLOT(undo())); //不用子窗口类去实现 redoAct = new QAction(QIcon(rsrcPath + "/editredo.png"),tr("重做(&R)"), this); redoAct->setShortcut(QKeySequence::Redo); redoAct->setToolTip("重做"); redoAct->setStatusTip(tr("恢复之前操作")); connect(redoAct, SIGNAL(triggered()), this, SLOT(redo())); //不用子窗口类去实现 cutAct = new QAction(QIcon(rsrcPath + "/editcut.png"),tr("剪切(&T)"), this); cutAct->setShortcuts(QKeySequence::Cut); cutAct->setToolTip("剪切"); cutAct->setStatusTip(tr("从文档中裁剪所选内容，并将其放入剪贴板")); connect(cutAct, SIGNAL(triggered()), this, SLOT(cut())); //不用子窗口类去实现 copyAct = new QAction(QIcon(rsrcPath + "/editcopy.png"),tr("复制(&C)"), this); copyAct->setShortcuts(QKeySequence::Copy); copyAct->setToolTip("复制"); copyAct->setStatusTip(tr("拷贝所选内容，并将其放入剪贴板")); connect(copyAct, SIGNAL(triggered()), this, SLOT(copy())); //不用子窗口类去实现 pasteAct = new QAction(QIcon(rsrcPath + "/editpaste.png"),tr("粘贴(&P)"), this); pasteAct->setShortcuts(QKeySequence::Paste); pasteAct->setToolTip("粘贴"); pasteAct->setStatusTip(tr("将剪贴板的内容粘贴到文档")); connect(pasteAct, SIGNAL(triggered()), this, SLOT(paste())); //不用子窗口类去实现 /*【格式】菜单动作集*/ boldAct = new QAction(QIcon(rsrcPath + "/textbold.png"),tr("加粗(&B)"), this); boldAct->setCheckable(true); boldAct->setShortcut(Qt::CTRL + Qt::Key_B); boldAct->setToolTip("加粗"); boldAct->setStatusTip(tr("将所选文字加粗")); QFont