Archived:ComboBox with color palettes in Qt

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Qt Quick should be used for all UI development on mobile devices. The approach described in this article (based on QWidget) is deprecated.

Article Metadata

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Tested with

Devices(s): Emulator,5800 XM

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Compatibility

Platform(s): S60 3rd Edition FP1, S60 3rd Edition FP2, S60 5th Edition

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Article

Keywords: QPalette,QComboBox

Created: mind_freak (07 Aug 2009)

Last edited: hamishwillee (11 Oct 2012)

Overview

In this code the different color palette are set as QComboBox items. List of different colors is provided as strings from which the palette color is retrieved.

Name of classes used:

QPalette-Contains color groups for each widget state

QComboBox-widget is a combined button and popup list

Code Snippet

#include "widget.h"
 
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    QStringList colorNms;
    colorNms <<"darkGreen"<<"green"<<"gray"<<"red"<<"white"<<"blue"<<"cyan"<<"darkMagenta"<<"yellow"<<"darkRed"<<"black"<<"magenta";
 
    Combcolor = new QComboBox(this);
    Combcolor->setMinimumWidth(40);
    Combcolor->setMaximumWidth(40);
    QPalette pal = Combcolor->palette(); // holds the widget's palette.
    pal.setColor(QPalette::Highlight, Qt::transparent); // construction of palette
    Combcolor->setPalette(pal); //set the comboBox palette
 
    int size = Combcolor->style()->pixelMetric(QStyle::PM_SmallIconSize);
    QPixmap pixmap(size,size);
 
    int con=0;
    foreach (QString name, colorNms)
    {
        Combcolor->addItem("", QColor(con));//Adding ComboItems
        pixmap.fill(QColor(name));
        Combcolor->setItemData(con, pixmap, Qt::DecorationRole);//Setting color palettes 
        con=con+1;
    }
}
 
Widget::~Widget()
{
}

Screenshot