标签：style http color io os ar 文件 sp div
Action 的用法
首先在头文件的 private 中加：
1 2 3 | QMenu *fileMenu;QMenu *editMenu;QMenu *helpMenu; |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | void MainWindow::createActions()//! [17] //! [18]{ newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this); newAct->setShortcuts(QKeySequence::New); newAct->setStatusTip(tr("Create a new file")); connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));//! [19] openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this); openAct->setShortcuts(QKeySequence::Open); openAct->setStatusTip(tr("Open an existing file")); connect(openAct, SIGNAL(triggered()), this, SLOT(open()));} |
menubar
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | fileMenu = menuBar()->addMenu(tr("&File")); fileMenu->addAction(newAct);//! [28] fileMenu->addAction(openAct);//! [28] fileMenu->addAction(saveAct);//! [26] fileMenu->addAction(saveAsAct); fileMenu->addSeparator(); fileMenu->addAction(exitAct); editMenu = menuBar()->addMenu(tr("&Edit")); editMenu->addAction(cutAct); editMenu->addAction(copyAct); editMenu->addAction(pasteAct); |
toolbar
1 2 3 4 5 6 7 8 9 10 11 | fileToolBar = addToolBar(tr("File")); fileToolBar->addAction(newAct);//! [29] //! [31] fileToolBar->addAction(openAct);//! [31] fileToolBar->addAction(saveAct); editToolBar = addToolBar(tr("Edit")); editToolBar->addAction(cutAct); editToolBar->addAction(copyAct); editToolBar->addAction(pasteAct); |
Qsetting
1 2 3 | QSettings settings("QtProject", "Application Example");settings.setValue("pos", pos());settings.setValue("size", size()); |
1 2 3 | QSettings settings("QtProject", "Application Example");QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();QSize size = settings.value("size", QSize(400, 400)).toSize(); |
打开文本文件
1 2 3 4 5 6 7 8 9 | void MainWindow::open()//! [7] //! [8]{ if (maybeSave()) { QString fileName = QFileDialog::getOpenFileName(this); if (!fileName.isEmpty()) loadFile(fileName); }} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | void MainWindow::loadFile(const QString &fileName)//! [42] //! [43]{ QFile file(fileName); if (!file.open(QFile::ReadOnly | QFile::Text)) { QMessageBox::warning(this, tr("Application"), tr("Cannot read file %1:\n%2.") .arg(fileName) .arg(file.errorString())); return; } QTextStream in(&file);#ifndef QT_NO_CURSOR QApplication::setOverrideCursor(Qt::WaitCursor);#endif textEdit->setPlainText(in.readAll());#ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor();#endif setCurrentFile(fileName); statusBar()->showMessage(tr("File loaded"), 2000);} |
文本文件保存
1 2 3 4 5 6 7 8 9 | bool MainWindow::saveAs()//! [11] //! [12]{ QString fileName = QFileDialog::getSaveFileName(this); if (fileName.isEmpty()) return false; return saveFile(fileName);} |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | bool MainWindow::saveFile(const QString &fileName)//! [44] //! [45]{ QFile file(fileName); if (!file.open(QFile::WriteOnly | QFile::Text)) { QMessageBox::warning(this, tr("Application"), tr("Cannot write file %1:\n%2.") .arg(fileName) .arg(file.errorString())); return false; } QTextStream out(&file);#ifndef QT_NO_CURSOR QApplication::setOverrideCursor(Qt::WaitCursor);#endif out << textEdit->toPlainText();#ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor();#endif setCurrentFile(fileName); statusBar()->showMessage(tr("File saved"), 2000); return true;} |
标签：style http color io os ar 文件 sp div
原文地址：http://www.cnblogs.com/chen-/p/4006584.html
