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Archived:How to select a color using QColorDialog

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{{Archived|timestamp=20120209041840|user=[[User:Hamishwillee|<br />----]]|[[:Category:Qt Quick|Qt Quick]] should be used for all UI development on mobile devices. The approach described in this article (based on {{Qapiname|QWidget}}) is deprecated.}}
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Revision as of 07:18, 9 February 2012

Archived.pngArchived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

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
Tested with
Devices(s): Emulator
Compatibility
Platform(s): Qt
Symbian
Platform Security
Capabilities: )
Article
Keywords: QColorDialog,QColor
Created: james1980 (28 Jan 2009)
Last edited: hamishwillee (09 Feb 2012)


Contents

Overview

This code snippet demonstrates how to use the QColorDialog for colour selection.


Preconditions

  • Download and install the Qt SDK


Source File

#include "dialogcolor.h"
 
dialogcolor::dialogcolor(QWidget *parent)
: QDialog(parent)
{
button = new QPushButton("Select Color", this);
connect(button, SIGNAL(clicked()), this, SLOT(setcolor()));
 
colorLabel =new QLabel(this);
layout = new QVBoxLayout(this);
layout->addWidget(button);
layout->addWidget(colorLabel);
setLayout(layout);
}
 
dialogcolor::~dialogcolor()
{
// No need to delete any object that got a parent that is properly deleted.
}
void dialogcolor::setcolor()
{
QColor color = QColorDialog::getColor(Qt::green, this);
if (color.isValid())
{
colorLabel->setText(color.name());
colorLabel->setPalette(QPalette(color));
colorLabel->setAutoFillBackground(true);
}
}

Header File

#ifndef DIALOGCOLOR_H
#define DIALOGCOLOR_H
 
#include <QtGui/QDialog>
#include "ui_dialogcolor.h"
#include <QPushButton>
#include <QColorDialog>
#include <QLabel>
#include <QVBoxLayout>
 
class dialogcolor : public QDialog
{
Q_OBJECT
 
public:
dialogcolor(QWidget *parent = 0);
~dialogcolor();
private slots:
void setcolor();
 
private:
QPushButton *button;
QLabel *colorLabel;
QVBoxLayout *layout;
};
 
#endif // DIALOGCOLOR_H

Screenshot

QColorDialog

Colordialog.JPG


Co.JPG


Co1.JPG

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