Qt 5.7 | Qt Charts | Pie Chart Customization Example | brushtool.cpp Example File

Qt 5.7.1 Reference Documentation

# brushtool.cpp Example File

piechartcustomization/brushtool.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Charts module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** 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
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      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** GNU General Public License Usage
      ** Alternatively, this file may be used under the terms of the GNU
      ** General Public License version 3 or (at your option) any later version
      ** approved by the KDE Free Qt Foundation. The licenses are as published by
      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
      ** included in the packaging of this file. Please review the following
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      #include "brushtool.h"
      #include <QtWidgets/QPushButton>
      #include <QtWidgets/QFormLayout>
      #include <QtWidgets/QComboBox>
      #include <QtWidgets/QColorDialog>

      BrushTool::BrushTool(QString title, QWidget *parent)
          : QWidget(parent)
      {
          setWindowTitle(title);
          setWindowFlags(Qt::Tool);

          m_colorButton = new QPushButton();
          m_styleCombo = new QComboBox();
          m_styleCombo->addItem("Nobrush", (int) Qt::NoBrush);
          m_styleCombo->addItem("Solidpattern", (int) Qt::SolidPattern);
          m_styleCombo->addItem("Dense1pattern", (int) Qt::Dense1Pattern);
          m_styleCombo->addItem("Dense2attern", (int) Qt::Dense2Pattern);
          m_styleCombo->addItem("Dense3Pattern", (int) Qt::Dense3Pattern);
          m_styleCombo->addItem("Dense4Pattern", (int) Qt::Dense4Pattern);
          m_styleCombo->addItem("Dense5Pattern", (int) Qt::Dense5Pattern);
          m_styleCombo->addItem("Dense6Pattern", (int) Qt::Dense6Pattern);
          m_styleCombo->addItem("Dense7Pattern", (int) Qt::Dense7Pattern);
          m_styleCombo->addItem("HorPattern", (int) Qt::HorPattern);
          m_styleCombo->addItem("VerPattern", (int) Qt::VerPattern);
          m_styleCombo->addItem("CrossPattern", (int) Qt::CrossPattern);
          m_styleCombo->addItem("BDiagPattern", (int) Qt::BDiagPattern);
          m_styleCombo->addItem("FDiagPattern", (int) Qt::FDiagPattern);
          m_styleCombo->addItem("DiagCrossPattern", (int) Qt::DiagCrossPattern);

          QFormLayout *layout = new QFormLayout();
          layout->addRow("Color", m_colorButton);
          layout->addRow("Style", m_styleCombo);
          setLayout(layout);

          connect(m_colorButton, SIGNAL(clicked()), this, SLOT(showColorDialog()));
          connect(m_styleCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(updateStyle()));
      }

      void BrushTool::setBrush(QBrush brush)
      {
          m_brush = brush;
          m_colorButton->setText(m_brush.color().name());
          m_styleCombo->setCurrentIndex(m_brush.style()); // index matches the enum
      }

      QBrush BrushTool::brush() const
      {
          return m_brush;
      }

      QString BrushTool::name()
      {
          return name(m_brush);
      }

      QString BrushTool::name(const QBrush &brush)
      {
          return brush.color().name();
      }

      void BrushTool::showColorDialog()
      {
          QColorDialog dialog(m_brush.color());
          dialog.show();
          dialog.exec();
          m_brush.setColor(dialog.selectedColor());
          m_colorButton->setText(m_brush.color().name());
          emit changed();
      }

      void BrushTool::updateStyle()
      {
          Qt::BrushStyle style = (Qt::BrushStyle) m_styleCombo->itemData(m_styleCombo->currentIndex()).toInt();
          if (m_brush.style() != style) {
              m_brush.setStyle(style);
              emit changed();
          }
      }

      #include "moc_brushtool.cpp"