×
Namespaces

Variants
Actions
(Difference between revisions)

Display camera preview using Qt Mobility

From Nokia Developer Wiki
Jump to: navigation, search
hamishwillee (Talk | contribs)
m (Added category Category:Symbian. (Preparing for ontology change))
hamishwillee (Talk | contribs)
m (Removed Symbian specifier on category, as this is not platform dependent)
Line 1: Line 1:
[[Category:Qt for Symbian]][[Category:Qt for Symbian]]
+
[[Category:Qt Mobility]]
 
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"  
 
{|style="background:#eceff2" width="660px" border="1" cellpadding="5" cellspacing="0"  
 
|-
 
|-
Line 8: Line 8:
 
|'''Tested on devices''' || Nokia N97 Mini
 
|'''Tested on devices''' || Nokia N97 Mini
 
|-
 
|-
|'''Category''' || Qt for Symbian
+
|'''Category''' || Qt
 
|'''Subcategory''' || Qt Mobility API
 
|'''Subcategory''' || Qt Mobility API
 
|-
 
|-
Line 145: Line 145:
 
* [http://qt.nokia.com/developer/new-qt-apis New Qt APIs Beta - Mobility Project]
 
* [http://qt.nokia.com/developer/new-qt-apis New Qt APIs Beta - Mobility Project]
 
* SDK help
 
* SDK help
--[[User:Skumar rao|Skumar rao]] 03:02, 28 March 2010 (UTC) [[Category:Qt]] [[Category:Symbian]]
 

Revision as of 05:32, 4 April 2011

ID Creation date 28th Mar 2010
Platform S60 5th Edition Tested on devices Nokia N97 Mini
Category Qt Subcategory Qt Mobility API


Keywords (APIs, classes, methods, functions): QCamera, QVideoWidget

Warning.pngWarning: Camera API has been removed from Mobility. It was in the tech preview and maybe it will be added again later on.

Tip.pngTip: Read this article before moving forward: Setting up environment for Qt Mobility API

Contents

Overview

Display Camera Preview on Widget using Qt Mobility APIs

Project configuration file (.Pro file)

  • Add the Qt Mobility project configuration option in the .Pro file as shown below
CONFIG += mobility
MOBILITY += multimedia
symbian:TARGET.CAPABILITY = UserEnvironment

Header File

#include <qcamera.h>
#include <qvideowidget.h>
#include <qstackedwidget.h>
 
class CameraApp : public QWidget
{
Q_OBJECT
public:
CameraApp(QWidget* parent = 0);
~CameraApp();
public slots:
void error(QCamera::Error);
private:
void initCamera();
 
private:
QStackedWidget* m_stackedWidget;
QCamera* m_camera;
QVideoWidget* m_videoWidget;
};

Source File

#include <qmessagebox.h>
#include <qgridlayout.h>
 
CameraApp::CameraApp(QWidget *parent) :
QWidget(parent), m_camera(0)
{
QGridLayout* layout = new QGridLayout;
layout->setSpacing(0);
layout->setMargin(0);
 
m_videoWidget = new QVideoWidget();
 
QPalette black(Qt::black);
m_stackedWidget = new QStackedWidget();
m_stackedWidget->setPalette(black);
 
m_stackedWidget->addWidget(m_videoWidget);
 
m_stackedWidget->setCurrentIndex(0);
layout->addWidget(m_stackedWidget);
 
setLayout(layout);
 
InitCamera();
}
void CameraApp::initCamera() {
QByteArray cameraDevice = QCamera::availableDevices()[0];
m_camera = new QCamera(cameraDevice);
 
connect(m_camera, SIGNAL(error(QCamera::Error)), this, SLOT(error(QCamera::Error)));
 
m_camera->setFocusMode(QCamera::AutoFocus);
 
m_videoWidget->setMediaObject(m_camera);
m_videoWidget->setAspectRatioMode(QVideoWidget::KeepAspectRatio);
 
if (m_camera->state() == QCamera::ActiveState) {
m_camera->stop();
}
m_camera->start();
}
void CameraApp::error(QCamera::Error e) {
switch (e) {
case QCamera::CameraError: {
QMessageBox::warning(this, "Camera error", "General camera error");
break;
}
case QCamera::NotReadyToCaptureError: {
QMessageBox::warning(this, "Camera error", "Camera not ready to capture image");
break;
}
case QCamera::InvalidRequestError: {
QMessageBox::warning(this, "Camera error", "Invalid request");
break;
}
case QCamera::ServiceMissingError: {
QMessageBox::warning(this, "Camera error", "Service missing");
break;
}
case QCamera::NotSupportedFeatureError: {
QMessageBox::warning(this, "Camera error", "Not supported feature");
break;
}
default:
break;
};
}

Classes

QCamera

QVideoWidget

Reference links

116 page views in the last 30 days.

Was this page helpful?

Your feedback about this content is important. Let us know what you think.

 

Thank you!

We appreciate your feedback.

×