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Color list editor

<source lang="cpp"> /****************************************************************************

    • Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
    • All rights reserved.
    • Contact: Nokia Corporation (qt-info@nokia.com)
    • This file is part of the examples of the Qt Toolkit.
    • $QT_BEGIN_LICENSE:LGPL$
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    • GNU Lesser General Public License Usage
    • Alternatively, this file may be used under the terms of the GNU Lesser
    • General Public License version 2.1 as published by the Free Software
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    • packaging of this file. Please review the following information to
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    • GNU General Public License Usage
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                                                                                                                                                        • /
  1. ifndef COLORLISTEDITOR_H
  2. define COLORLISTEDITOR_H
  3. include <QComboBox>

QT_BEGIN_NAMESPACE class QColor; class QWidget; QT_END_NAMESPACE

class ColorListEditor : public QComboBox {

   Q_OBJECT
   Q_PROPERTY(QColor color READ color WRITE setColor USER true)

public:

   ColorListEditor(QWidget *widget = 0);

public:

   QColor color() const;
   void setColor(QColor c);

private:

   void populateList();

};

  1. endif


  1. include <QtGui>
  2. include "colorlisteditor.h"

ColorListEditor::ColorListEditor(QWidget *widget) : QComboBox(widget) {

   populateList();

}

QColor ColorListEditor::color() const {

   return qVariantValue<QColor>(itemData(currentIndex(), Qt::DecorationRole));

}

void ColorListEditor::setColor(QColor color) {

   setCurrentIndex(findData(color, int(Qt::DecorationRole)));

}

void ColorListEditor::populateList() {

   QStringList colorNames = QColor::colorNames();
   for (int i = 0; i < colorNames.size(); ++i) {
       QColor color(colorNames[i]);
       insertItem(i, colorNames[i]);
       setItemData(i, color, Qt::DecorationRole);
   }

}


  1. ifndef WINDOW_H
  2. define WINDOW_H
  3. include <QWidget>

class Window : public QWidget {

   Q_OBJECT

public:

   Window();

private:

   void createGUI();

};

  1. endif


  1. include <QtGui>
  2. include "window.h"
  3. include "colorlisteditor.h"

Window::Window() {

   QItemEditorFactory *factory = new QItemEditorFactory;
   QItemEditorCreatorBase *colorListCreator =
       new QStandardItemEditorCreator<ColorListEditor>();
   factory->registerEditor(QVariant::Color, colorListCreator);
   QItemEditorFactory::setDefaultFactory(factory);
   createGUI();

}

void Window::createGUI() {

   QList<QPair<QString, QColor> > list;
   list << QPair<QString, QColor>(tr("Alice"), QColor("aliceblue")) <<
           QPair<QString, QColor>(tr("Neptun"), QColor("aquamarine")) <<
           QPair<QString, QColor>(tr("Ferdinand"), QColor("springgreen"));
   QTableWidget *table = new QTableWidget(3, 2);
   table->setHorizontalHeaderLabels(QStringList() << tr("Name")
                                                  << tr("Hair Color"));
   table->verticalHeader()->setVisible(false);
   table->resize(150, 50);
   for (int i = 0; i < 3; ++i) {
       QPair<QString, QColor> pair = list.at(i);
       QTableWidgetItem *nameItem = new QTableWidgetItem(pair.first);
       QTableWidgetItem *colorItem = new QTableWidgetItem;
       colorItem->setData(Qt::DisplayRole, pair.second);
       table->setItem(i, 0, nameItem);
       table->setItem(i, 1, colorItem);
   }
   table->resizeColumnToContents(0);
   table->horizontalHeader()->setStretchLastSection(true);
   QGridLayout *layout = new QGridLayout;
   layout->addWidget(table, 0, 0);
   setLayout(layout);
   setWindowTitle(tr("Color Editor Factory"));

}


  1. include <QtGui>
  2. include "window.h"

int main(int argv, char **args) {

   QApplication app(argv, args);
   Window window;
   window.show();
   return app.exec();

}


 </source>