Qt 5.9 | Qt Widgets | MDI Example | mainwindow.h Example File

Qt 5.9.9 Reference Documentation

# mainwindow.h Example File

mainwindows/mdi/mainwindow.h

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #ifndef MAINWINDOW_H
      #define MAINWINDOW_H

      #include <QMainWindow>

      class MdiChild;
      class QAction;
      class QMenu;
      class QMdiArea;
      class QMdiSubWindow;

      class MainWindow : public QMainWindow
      {
          Q_OBJECT

      public:
          MainWindow();

          bool openFile(const QString &fileName);

      protected:
          void closeEvent(QCloseEvent *event) override;

      private slots:
          void newFile();
          void open();
          void save();
          void saveAs();
          void updateRecentFileActions();
          void openRecentFile();
      #ifndef QT_NO_CLIPBOARD
          void cut();
          void copy();
          void paste();
      #endif
          void about();
          void updateMenus();
          void updateWindowMenu();
          MdiChild *createMdiChild();
          void switchLayoutDirection();

      private:
          enum { MaxRecentFiles = 5 };

          void createActions();
          void createStatusBar();
          void readSettings();
          void writeSettings();
          bool loadFile(const QString &fileName);
          static bool hasRecentFiles();
          void prependToRecentFiles(const QString &fileName);
          void setRecentFilesVisible(bool visible);
          MdiChild *activeMdiChild() const;
          QMdiSubWindow *findMdiChild(const QString &fileName) const;

          QMdiArea *mdiArea;

          QMenu *windowMenu;
          QAction *newAct;
          QAction *saveAct;
          QAction *saveAsAct;
          QAction *recentFileActs[MaxRecentFiles];
          QAction *recentFileSeparator;
          QAction *recentFileSubMenuAct;
      #ifndef QT_NO_CLIPBOARD
          QAction *cutAct;
          QAction *copyAct;
          QAction *pasteAct;
      #endif
          QAction *closeAct;
          QAction *closeAllAct;
          QAction *tileAct;
          QAction *cascadeAct;
          QAction *nextAct;
          QAction *previousAct;
          QAction *windowMenuSeparatorAct;
      };

      #endif