Display camera preview using Qt Mobility
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| − | [[ | + | {{ArticleMetaData <!-- v1.2 --> |
| + | |sourcecode= <!-- Link to example source code e.g. [[Media:The Code Example ZIP.zip]] --> | ||
| + | |installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) --> | ||
| + | |devices= <!-- Devices tested against - e.g. ''devices=Nokia 6131 NFC, Nokia C7-00'') --> | ||
| + | |sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Qt SDK 1.1.4]) --> | ||
| + | |platform= <!-- Compatible platforms - e.g. Symbian^1 and later, Qt 4.6 and later --> | ||
| + | |devicecompatability= <!-- Compatible devices e.g.: All* (must have internal GPS) --> | ||
| + | |dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 --> | ||
| + | |signing= <!-- Signing requirements - empty or one of: Self-Signed, DevCert, Manufacturer --> | ||
| + | |capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. --> | ||
| + | |keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase --> | ||
| + | |language= <!-- Language category code for non-English topics - e.g. Lang-Chinese --> | ||
| + | |translated-by= <!-- [[User:XXXX]] --> | ||
| + | |translated-from-title= <!-- Title only --> | ||
| + | |translated-from-id= <!-- Id of translated revision --> | ||
| + | |review-by= <!-- After re-review: [[User:username]] --> | ||
| + | |review-timestamp= <!-- After re-review: YYYYMMDD --> | ||
| + | |update-by= <!-- After significant update: [[User:username]]--> | ||
| + | |update-timestamp= <!-- After significant update: YYYYMMDD --> | ||
| + | |creationdate= 20100328 | ||
| + | |author= [[User:Skumar rao]] | ||
| + | }} | ||
| + | [[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" | ||
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|'''Tested on devices''' || Nokia N97 Mini | |'''Tested on devices''' || Nokia N97 Mini | ||
|- | |- | ||
| − | |'''Category''' || Qt | + | |'''Category''' || Qt |
|'''Subcategory''' || Qt Mobility API | |'''Subcategory''' || Qt Mobility API | ||
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{{Warning| Camera API has been removed from Mobility. It was in the tech preview and maybe it will be added again later on.}} | {{Warning| Camera API has been removed from Mobility. It was in the tech preview and maybe it will be added again later on.}} | ||
| − | {{Tip| Read this article before moving forward: [[Setting up environment for Qt Mobility API]]}} | + | {{Tip| Read this article before moving forward: [[Archived:Setting up environment for Qt Mobility API]]}} |
== Overview == | == Overview == | ||
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== Header File == | == Header File == | ||
| − | <code cpp> | + | <code cpp-qt> |
#include <qcamera.h> | #include <qcamera.h> | ||
#include <qvideowidget.h> | #include <qvideowidget.h> | ||
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== Source File == | == Source File == | ||
| − | <code cpp> | + | <code cpp-qt> |
#include <qmessagebox.h> | #include <qmessagebox.h> | ||
#include <qgridlayout.h> | #include <qgridlayout.h> | ||
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</code> | </code> | ||
| − | <code cpp> | + | <code cpp-qt> |
void CameraApp::initCamera() { | void CameraApp::initCamera() { | ||
QByteArray cameraDevice = QCamera::availableDevices()[0]; | QByteArray cameraDevice = QCamera::availableDevices()[0]; | ||
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</code> | </code> | ||
| − | <code cpp> | + | <code cpp-qt> |
void CameraApp::error(QCamera::Error e) { | void CameraApp::error(QCamera::Error e) { | ||
switch (e) { | switch (e) { | ||
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== Reference links== | == Reference links== | ||
* [http://qt.nokia.com/ Qt - cross-platform application and UI framework] | * [http://qt.nokia.com/ Qt - cross-platform application and UI framework] | ||
| − | * [http:// | + | * [http://developer.qt.nokia.com/wiki/Category:Qt_Labs_Projects Qt Mobility API] |
| − | * [http://qt.nokia.com/developer/ | + | * [http://qt.nokia.com/developer/qt-roadmap New Qt APIs Beta - Mobility Project][[Category:MeeGo Harmattan]] [[Category:Symbian]] |
| − | + | ||
| − | + | ||
Latest revision as of 04:23, 11 October 2012
Article Metadata
| 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: Camera API has been removed from Mobility. It was in the tech preview and maybe it will be added again later on.
Tip: Read this article before moving forward: Archived: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
