Color list editor : QComboBox « Qt « C++

1. C++
2. Qt
3. QComboBox

Color list editor

  

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#ifndef COLORLISTEDITOR_H
#define COLORLISTEDITOR_H

#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();
};


#endif





#include <QtGui>

#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);
    }
}






#ifndef WINDOW_H
#define WINDOW_H

#include <QWidget>

class Window : public QWidget
{
    Q_OBJECT

public:
    Window();

private:
    void createGUI();
};

#endif





#include <QtGui>

#include "window.h"
#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"));
}





#include <QtGui>

#include "window.h"

int main(int argv, char **args)
{
    QApplication app(argv, args);

    Window window;
    window.show();

    return app.exec();
}

   
    
  

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