Qt 5.7 | Qt Designer Manual | Container Extension Example | multipagewidget.cpp Example File

Qt 5.7.1 Reference Documentation

# multipagewidget.cpp Example File

containerextension/multipagewidget.cpp

      /****************************************************************************
      **
      ** 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."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include <QComboBox>
      #include <QVBoxLayout>
      #include <QStackedWidget>

      #include "multipagewidget.h"

      MultiPageWidget::MultiPageWidget(QWidget *parent)
          : QWidget(parent)
          , stackWidget(new QStackedWidget)
          , comboBox(new QComboBox)
      {
          typedef void (QComboBox::*ComboBoxActivatedIntSignal)(int);

          comboBox->setObjectName("__qt__passive_comboBox");

          connect(comboBox, static_cast<ComboBoxActivatedIntSignal>(&QComboBox::activated),
                  this, &MultiPageWidget::setCurrentIndex);

          QVBoxLayout *layout = new QVBoxLayout(this);
          layout->addWidget(comboBox);
          layout->addWidget(stackWidget);
      }

      QSize MultiPageWidget::sizeHint() const
      {
          return QSize(200, 150);
      }

      void MultiPageWidget::addPage(QWidget *page)
      {
          insertPage(count(), page);
      }

      void MultiPageWidget::removePage(int index)
      {
          QWidget *widget = stackWidget->widget(index);
          stackWidget->removeWidget(widget);

          comboBox->removeItem(index);
      }

      int MultiPageWidget::count() const
      {
          return stackWidget->count();
      }

      int MultiPageWidget::currentIndex() const
      {
          return stackWidget->currentIndex();
      }

      void MultiPageWidget::insertPage(int index, QWidget *page)
      {
          page->setParent(stackWidget);

          stackWidget->insertWidget(index, page);

          QString title = page->windowTitle();
          if (title.isEmpty()) {
              title = tr("Page %1").arg(comboBox->count() + 1);
              page->setWindowTitle(title);
          }
          connect(page, &QWidget::windowTitleChanged,
                  this, &MultiPageWidget::pageWindowTitleChanged);
          comboBox->insertItem(index, title);
      }

      void MultiPageWidget::setCurrentIndex(int index)
      {
          if (index != currentIndex()) {
              stackWidget->setCurrentIndex(index);
              comboBox->setCurrentIndex(index);
              emit currentIndexChanged(index);
          }
      }

      void MultiPageWidget::pageWindowTitleChanged()
      {
          QWidget *page = qobject_cast<QWidget *>(sender());
          const int index = stackWidget->indexOf(page);
          comboBox->setItemText(index, page->windowTitle());
      }

      QWidget* MultiPageWidget::widget(int index)
      {
          return stackWidget->widget(index);
      }

      QString MultiPageWidget::pageTitle() const
      {
          if (const QWidget *currentWidget = stackWidget->currentWidget())
              return currentWidget->windowTitle();
          return QString();
      }

      void MultiPageWidget::setPageTitle(QString const &newTitle)
      {
          if (QWidget *currentWidget = stackWidget->currentWidget())
              currentWidget->setWindowTitle(newTitle);
          emit pageTitleChanged(newTitle);
      }