stylesheetdialog.cpp Example File | Qt WebEngine 5.10

Qt 5.10 | Qt WebEngine | WebEngine StyleSheet Browser Example | stylesheetdialog.cpp Example File

Qt 5.10.1 Reference Documentation

# stylesheetdialog.cpp Example File

webenginewidgets/stylesheetbrowser/stylesheetdialog.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2017 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 "mainwindow.h"
      #include "stylesheetdialog.h"
      #include "ui_stylesheetdialog.h"

      StylesheetDialog::StylesheetDialog(QWidget *parent) :
          QDialog(parent),
          ui(new Ui::StylesheetDialog)
      {
          ui->setupUi(this);

          connect(ui->styleSheetList, &QListWidget::currentItemChanged, this, &StylesheetDialog::currentStyleSheetChanged);
          connect(ui->fileNameEdit, &QLineEdit::textChanged, this, &StylesheetDialog::fileNameChanged);

          connect(ui->addButton, &QPushButton::clicked, this, &StylesheetDialog::addButtonClicked);
          connect(ui->removeButton, &QPushButton::clicked, this, &StylesheetDialog::removeButtonClicked);

          QSettings settings;
          settings.beginGroup("styleSheets");
          for (auto name : settings.allKeys())
              new QListWidgetItem(name,  ui->styleSheetList);
          settings.endGroup();
      }

      StylesheetDialog::~StylesheetDialog()
      {
          delete ui;
      }

      void StylesheetDialog::currentStyleSheetChanged(QListWidgetItem *current, QListWidgetItem *previous)
      {
          if (!previous) {
              // Select the first item on startup
              ui->styleSheetList->setCurrentItem(current);
          }

          if (!current) {
              ui->fileNameEdit->setText(QString());
              ui->sourceCodeEdit->setPlainText(QString());
              return;
          }

          QSettings settings;
          settings.beginGroup("styleSheets");
          ui->fileNameEdit->setText(current->text());
          ui->sourceCodeEdit->setPlainText(settings.value(current->text(), QString()).toString());
          settings.endGroup();
      }

      void StylesheetDialog::fileNameChanged(const QString &text)
      {
          QList<QListWidgetItem *> items = ui->styleSheetList->findItems(text, Qt::MatchFixedString);
          if (items.size())
              ui->addButton->setEnabled(false);
          else
              ui->addButton->setEnabled(true);
      }

      void StylesheetDialog::addButtonClicked()
      {
          new QListWidgetItem(ui->fileNameEdit->text(),  ui->styleSheetList);

          MainWindow *window = static_cast<MainWindow *>(parent());
          const QString name = ui->fileNameEdit->text();
          const QString source = ui->sourceCodeEdit->toPlainText();
          window->insertStyleSheet(name, source, true);

          QSettings settings;
          settings.beginGroup("styleSheets");
          settings.setValue(name, source);
          settings.endGroup();

          ui->addButton->setEnabled(false);
      }

      void StylesheetDialog::removeButtonClicked()
      {
          if (ui->styleSheetList->selectedItems().isEmpty())
              return;

          MainWindow *window = static_cast<MainWindow *>(parent());
          QSettings settings;
          settings.beginGroup("styleSheets");

          QListWidgetItem *item = ui->styleSheetList->selectedItems().first();
          const QString name = item->text();
          window->removeStyleSheet(name, true);
          settings.remove(name);
          delete item;

          settings.endGroup();
      }